Copyright reserved 2000 Philips Consumer Electronics B.V. Eindhoven, The
Netherlands. All rights reserved. No part of this publication may be reproduced,
stored in a retrieval system or transmitted, in any form or by any means, electronic,
mechanical, photocopying, or otherwise without the prior permission of Philips.
Published by JvR 0062 Service PaCEPrinted in the NetherlandsSubject to modification5 3122 785 10430
Page 2
GB 2A10E1.
Technical specification, connection facilities and chassis overview
1.Technical specification, connection facilities and chassis
overview
1.1Supply
Mains Voltage: 230 Vac ± 15 %
Power Consumption: 160 W max.
Stand By cosumption (220V):≤ 3 W
Mains Frequency: 50 - 60 Hz ( 5 %
Tuning System: PLL
Reception: Western Europe -
PAL B/G/D/K/I,
SECAM B/G/D/K/L/L’
: Eastern Europe - PAL
B/G/D/K, SECAM B/
G/D/K
Sound System: Western Europe -
2CS BG, NICAM I/B/
G/D/K/L,
1.2Connection Diagram
EXT1
EXT2
AUDIO L, R
: Eastern Europe -
2CS, NICAM B/G/D/K
Sound Output: 2 x 5 W - 24” and 28”
Ambient temperature : : + 5 oC to +45
: 2 x 10 W - 32”
ο
C
Frequency ranges - tuner: Off air - 45.25 - 855.25
MHz
: Cable - 69.25 - 463.25
MHz
Aerial input: Coaxial 75
Ω
Synchronization : Horizontal Pull-In
range ( +200-300Hz )
: Vertical pull-in Range
( ± 5 Hz )
Teletext: 10 / 100 pages
Remote Control : Type - RCA10E82B
FRONT + TOP CONTROL
OR
- VOLUME +
SIDE I/O
S-Video
Video
1.2.1EXT1: CVBS (in/out) + RGB (in) - Tuner at output
1 - Audio R (0.5 V
2 - Audio R (0.2 - 2 V
3 - Audio L (0.5 V
4 - Audio GND
RMS
RMS
/ 1 kΩ)
/ 10 kΩ)
RMS
/ 1kΩ)
5 - Blue GND
6 - Audio L (0.2 - 2 V
7 - Blue (0.7 V
RMS
/ 75 Ω)
PP
/ 10kΩ)
8 - CVBS status (0-2V: INT; 4.5-7V: EXT1-16/9; 9.5-
12V:EXT1-4/3)
9 - Green GND
10-
11- Green (0.7 V
12-
/ 75 Ω)
PP
13- Red GND
14- RGB status GND
15- Red (0.7 V
/ 75Ω)
PP
16- RGB status (0-0.4V: INT;1-3V: EXT1/75Ω)
17- CVBS GND
18- CVBS GND
19- CVBS (1 V
20- CVBS (1 V
21- Earth screen GND
PP
PP
/75Ω)
/75Ω)
IR
RED
Figure 1-1
k
j
k
H
H
j
j
H
j
H
H
j
H
H
k
j
H
L
- PROGRAM +
CL 06532012_007.eps
Audio
R
010200
1.2.2EXT2: CVBS (in/out) + SVHS (in)
Input: EXT2 then output = tuner; input: other then output = input
1 - Audio R (0.5 V
2 - Audio R (0.2 - 2 V
3 - Audio L (0.5 V
9.5 - 12 V: EXT1 4:3)
9-
10-
11-
12-
13- C GND
14-
15- C (300 mV
/ 75 Ω)
PP
16-
17- CVBS GND
18- CVBS GND
19- CVBS (1 V
20- CVBS/Y (1 V
/ 75 Ω)
PP
/ 75 Ω)
PP
21- Earth screen GND
k
j
k
H
j
H
j
H
H
k
j
H
Page 3
Technical specification, connection facilities and chassis overview
GB 3A10E1.
1.2.3Cinch - audio out
L - Audio (red) (0.5 V
R - Audio (white) (0.5 V
RMS
RMS
1.2.4Cinch - audio/video in
--CVBS
(yellow) (1 V)
L - Audio (red) (0.2 - 2 V
R - Audio (white) (0.2 - 2 V
1.3PCB location drawing
B
D
C
CRT/SCAVEM PANEL
SIDE I/O PANEL
SMALL SIGNAL BOARD
/ 1 kΩ)
/ 1 kΩ)
/ 10 kΩ)
RMS
/ 10 kΩ)
RMS
kq
kq
jq
jq
jq
1.2.5Headphone
- - Jack 32 - 2000
1.2.6SVHS
pppp
1-
2-
3-Y (1 V
4-C (0.3 V
Ω
.(10 mW)
/ 75 Ω)
PP
/ 75 Ω)
PP
TOP CONTROL PANEL
LARGE SIGNAL PANEL
t
E
A
MAINSWITCH PANEL
CL 06532012_014.eps
J
140300
Page 4
GB 4A10E2.
Safety instructions, maintenance instruction, warnings and Notes
2.Safety instructions, maintenance instruction, warnings and Notes
2.1Safety instructions for repairs
1. Safety regulations require that during a repair:
– The set should be connected to the mains via an
isolating transformer;
– Safety components, indicated by the symbol h,
should be replaced by components identical to the
original ones;
– When replacing the CRT, safety goggles must be
worn.
2. Safety regulations require that after a repair the set must
be returned in its original condition. In particular attention
should be paid to the following points.
– As a strict precaution, we advise you to resolder the
solder joints through which the horizontal deflection
current is flowing, in particular ('general repair
instruction'):
•All pins of the line output transformer (LOT);
•Fly-back capacitor(s);
•S-correction capacitor(s);
•Line output transistor;
•Pins of the connector with wires to the deflection
coil;
•Other components through which the deflection
current flows.
•Note:
•This resoldering is advised to prevent bad
connections due to metal fatigue in solder joints
and is therefore only necessary for television sets
older than 2 years.
– The wire trees and EHT cable should be routed
correctly and fixed with the mounted cable clamps.
– The insulation of the mains lead should be checked for
external damage.
– The mains lead strain relief should be checked for its
function in order to avoid touching the CRT, hot
components or heat sinks.
– The electrical DC resistance between the mains plug
and the secondary side should be checked (only for
sets which have a mains isolated power supply). This
check can be done as follows:
•Unplug the mains cord and connect a wire
between the two pins of the mains plug;
•Set the mains switch to the "on" position (keep the
mains cord unplugged!);
•Measure the resistance value between the pins of
the mains plug and the metal shielding of the tuner
or the aerial connection on the set. The reading
should be between 4.5 MΩ and 12 M
•Switch off the TV and remove the wire between the
two pins of the mains plug.
– The cabinet should be checked for defects to avoid
touching of any inner parts by the customer.
hhhh
2.2Maintenance instruction
It is recommended to have a maintenance inspection carried
out by a qualified service employee. The interval depends on
the usage conditions:
– When the set is used under normal circumstances, for
example in a living room, the recommended interval is 3 to
5 years.
– When the set is used in circumstances with higher dust,
grease or moisture levels, for example in a kitchen, the
recommended interval is 1 year.
– The maintenance inspection contains the following actions:
•Execute the above mentioned 'general repair
instruction'.
•Clean the power supply and deflection circuitry on the
chassis.
•Clean the picture tube panel and the neck of the picture
tube.
2.3Warnings
1. ESD
2. All ICs and many other semiconductors are susceptible to
3. Available ESD protection equipment:
4. In order to prevent damage to ICs and transistors, all high-
5. Together with the deflection unit and any multipole unit, the
6. Be careful during measurements in the high-voltage
7. Never replace modules or other components while the unit
8. When making settings, use plastic rather than metal tools.
9. Wear safety goggles during replacement of the picture
w
electrostatic discharges (ESD). Careless handling during
repair can reduce life drastically. When repairing, make
sure that you are connected with the same potential as the
mass of the set by a wristband with resistance. Keep
components and tools also at this same potential.
– Complete kit ESD3 (small table mat, Wristband,
Connection box, Extension cable and Earth cable)
4822 310 10671
– Wristband tester 4822 344 13999
voltage flashovers must be avoided. In order to prevent
damage to the picture tube, the method shown in Fig. 2.1
should be used to discharge the picture tube. Use a highvoltage probe and a multimeter (position DC-V). Discharge
until the meter reading is 0V (after approx. 30s).
flat square picture tubes used form an integrated unit. The
deflection and the multipole units are set optimally at the
factory. Adjustment of this unit during repair is therefore not
recommended.
section and on the picture tube.
is switched on.
This will prevent any short circuits and the danger of a
circuit becoming unstable.
tube.
2.4Notes
The direct voltages and oscillograms should be measured with
regard to the tuner earth (H), or hot earth (I) as this is called.
The direct voltages and oscillograms shown in the diagrams
are indicative and should be measured in the Service Default
Ω
Mode (see chapter 8) with a colour bar signal and stereo sound
(L:3 kHz, R:1 kHz unless stated otherwise) and picture carrier
at 475.25 MHz.
Where necessary, the oscillograms and direct voltages are
measured with (D) and without aerial signal (E). Voltages in
the power supply section are measured both for normal
operation (G) and in standby (F). These values are indicated
by means of the appropriate symbols.
The picture tube PWB has printed spark gaps. Each spark gap
is connected between an electrode of the picture tube and the
Aquadag coating.
The semiconductors indicated in the circuit diagram and in the
parts lists are completely interchangeable per position with the
semiconductors in the unit, irrespective of the type indication
on these semiconductors.
Page 5
Safety instructions, maintenance instruction, warnings and Notes
V
CL 26532098/042
140792
Figure 2-1
GB 5A10E2.
Page 6
GB 6A10E3.
The television set has 4 keys which are
located on the front or the top of the set
depending on the model.
The VOLUME - + (-
”
+) keys are used to
adjust sound levels.
The PROGRAM - + (- P +) keys are used to
select the required programmes.
To access the menus, simultaneously hold
down the
”
- and
”
+ keys.The
PROGRAM - + keys may then be used to
select an adjustment and the -
”
+ keys to
make that adjustment.
To exit from the menus,hold down the 2
”
- and
”
+ keys.
Note
: when the CHILD LOCK function is activated,
these keys are unavailable (refer to FEATURES
menu on page 8).
P
+
+
-
-
a
P
+
+
-
-
a
2
&
Positioning the television set
Place your TV on a solid, stable surface, leaving
a space of at least 5 cm around the appliance.
To avoid accidents,do not put anything on the
set such as a cloth or cover, a container full of
liquid (vase) or a heat source (lamp).The set
must not be exposed to water.
é
Connections
• Insert the aerial plug into the
:
socket at
the rear of the set.
• Insert the mains plug into a wall socket (220-
240 V / 50 Hz).
“
Remote control
Insert the two R6-type batteries (supplied)
making sure that they are the right way round.
Check that the mode selector is set to TV.
The batteries supplied with this appliance do not
contain mercury or nickel cadmium. If you have
access to a recycling facility, please do not discard
your used batteries (if in doubt, consult your dealer).
When the batteries are replaced, use the same type.
‘
Switching on
To switch on the set, press the on/off key.
A red indicator comes on and the screen
lights up. Go straight to the chapter Quick
installation on page 4.
If the television remains in standby mode,
press P
#
on the remote control.
The indicator will flashe when you use the remote
control.
5 cm
5 cm
5 cm
Installing your television set
The keys on the TV set
1
Introduction
Table of Contents
Thank you for purchasing this television set.
This handbook has been designed to help you install and operate your TV set.
We would strongly recommend that you read it thoroughly.
We hope our technology meets entirely with your satisfaction.
The materials used in your set are either reusable or can be recycled.
To minimise environmental waste, specialist companies collect used appliances
and dismantle them after retrieving any materials that can be used again (ask
your dealer for further details).
3.Directions for use
Directions for use
Page 7
Directions for use
4
Quick installation
Sorting programmes
The first time you switch on the television, a
menu appears on the screen.
This menu asks you to choose the language of
the menus :
If the menu does not appear, hold down the
”
-
and
”
+ keys on the set for 5 seconds to bring
it up.
& Use the
IJ
keys on the remote control to
choose your language then confirm with
L
.
é Then select your country using the
IJ
keys
and confirm with
L
.
If your country does not appear in the list, select “.. .”
“ Tuning starts automatically.
The operation takes several minutes.
A display shows the search status and the
number of programmes found.When it has
finished the menu disappears.
To exit or interrupt the search, press the
H
key.
If no programmes are found, refer to the chapter
entitled Tips on p. 14.
‘ If the transmitter or the cable network
broadcasts the automatic sort signal, the
programmes will be correctly numbered.
( If not, the programmes found will be
numbered in descending order starting at 99,
98, 97,etc. (or 79, 78,...).
Use the SORT menu to renumber them.
Some transmitters or cable networks broadcast
their own sort parameters (region, language, etc.).
Where this is the case, make your choice using the
IJ
keys and confirm with
L
.
& Press the
H
key.The main menu is displayed.
é Select INSTALL (
J
), then press
L
.
The INSTALL menu appears.
“ Using the
J
key, select SORT then press
L
.
The SORT menu appears.The FROM option is
activated.
Note:
this menu works as follows:
• Change "FROM" (enter the current programme
number),
• "TO" (enter the new number),
• EXCHANGE numbers" (the operation is carried
out).
‘ Select the programme you wish to renumber
using
KL
keys or
0
to
9
.
Example: to renumber programme 78 as 2
press
78
.
( Select TO (using
J
key) and enter the new
number with
KL
keys or
0
to
9
(for the
example given, enter
2
).
§ Select EXCHANGE (
J
key) and press
L
.
The message EXCHANGED appears, the
exchange takes place. In our example,
programme 78 is renumbered as 2 (and
programme 2 as 78).
è Select the option FROM (
I
key) and repeat
stages ‘ to § as many times as there are
programmes to renumber.
! To exit from the menus, press
R
.
SELECT LANGUAGE
LANGUAGE
•
ENGLISH
DANSK
NEDERLANDS
FINNISH
FRANCAIS
COUNTRY
ABCHDDK
• PICTURE
• SOUND
• FEATURES
• INSTALL
INSTALL
• LANGUAGE
• COUNTRY
• AUTO STORE
• MANUAL STORE
• SORT
• NAME
FROMTOEXCHANGE
3
The remote control keys
key not used
key not used
Mode selector (p. 13)
To activate the remote control
in TV,VCR (video recorder) or
DVD mode.
Select EXT sockets
Press several times to select
EXT1, EXT2 and on certain
models EXT3 and S-VHS2.
Smart sound controls
To access a series of settings:
VOICE, MUSIC,THEATRE and
return to PERSONAL
Menu
To display or exit from the menus
Cursor
These 4 keys are used to move
within the menus or to have
direct access to the 16:9 formats
(p 10).
Mute
To disable or enable the sound.
Volume
To adjust the sound level
Sound mode
To switch from STEREO to
MONO or to choose between
Dual I and Dual II for
bilingual transmissions.
For TV sets fitted with NICAM
reception, depending on the
transmission, you can switch
from NICAM STEREO to
MONO or choose between
NICAM DUAL I, NICAM DUAL
II and MONO.
When the sound mode is switched
to MONO, the indication is
displayed in red.
Contrast +
To activate / de-activate the
automatic contrast adjustment
system (the dark areas are made
darker whilst maintaining the
detail).
Standby
To set the TV to standby mode.
To switch the TV set on again,
press P
@#
or
09
.
Numerical keys
For direct access to programmes.
For a 2 digit programme number,
the 2
nd
digit must be entered
before the dash disappears.
Smart picture controls
To access a series of settings:
RICH, NATURAL, SOFT,
MULTIMEDIA and return to
PERSONAL.
Incredible Surround
To activate / deactivate the
surround sound effect. In stereo,
this gives the impression that
the speakers are further apart.
In mono, a stereo spatial effect
is simulated.
Selecting TV programmes
To move up or down a
programme.The number,(the
name) and the sound mode are
displayed for a few seconds.
For some programmes equipped with
teletext, the title of the programme
appears at the bottom of the screen.
Teletext features (p. 9)
Previous programme
To access the previously viewed
programme.
16:9 formats (p. 10)
Screen information
To display / remove the programme
number,the name (if it exists), the
time, the sound mode and the
time remaining on the timer. Hold
down for 5 seconds to
permanently display the
programme number on the screen
Sleeptimer
To select the length of time
before the set automatically
switches to standby (from 0 to
240 minutes)
GB 7A10E3.
Page 8
GB 8A10E3.
6
Manual tuning
Programme name
This menu allows you to store the
programmes one by one.
& Press
H
.
é Select INSTALL (
J
), then press
L
.
The INSTALL menu appears.
“ Select MANUAL STORE (
J
) then press
L
.
The menu appears :
‘ Press
L
to go to the SYSTEM menu.
Use
IJ
to choose EUROPE (automatic
detection*) or manual detection with WEST
EUR (standard BG reception), EAST EUR
(standard DK reception), UK (standard I
reception) or FRANCE (standard LL').
Then press
K
to exit from the menu.
* Except for France (standard LL'): select the
option FRANCE.
( Select SEARCH and press
L
.
The search begins.As soon as a programme is
found, the search will stop. If you know the
frequency of the programme required,enter
its number directly using the
09
keys and
go to step è.
If no programme is found, refer to the Tips chapter
on page 14).
§ If reception is un-satisfactory, select FINE
TUNE and hold down
K
or
L
key.
è Select PROG. NO (programme number) and
use the
KL
or
0
to
9
keys to enter the
desired number.
! Select STORE and press
L
.The message
STORED appears.The programme is stored.
ç Repeat steps ( to ! for each programme to
be stored.
To exit: press the
R
key.
You may, if you wish, give a name to the first
40 programmes (from 1 to 40).
& Press
H
.
é Select INSTALL (
J
), then press
L
.
The INSTALL menu appears.
“ Press
J
5 times to select NAME (concealed
at the bottom of the screen), then press
L
.
The menu appears :
‘ Select the programme you wish to name using
the keys
09
or
@
P
#
.
Note:
at the time of installation, the programmes
are automatically named when the identification
signal is transmitted.
( Use the keys
KL
to move within the name
display area (5 characters).
§ Use keys
IJ
to choose the characters.
è Press
H
when the name has been entered.
The programme name is stored.
! Repeat steps ‘ to è for each programme to
be named.
ç To exit from the menus, press
R
.
• PICTURE
• SOUND
• FEATURES
• INSTALL
INSTALL
MANUAL STORE
• SYSTEM
• SEARCH
• PROG. NO.
• FINE TUNE
• STORE
EUROPE
WEST EUR
EAST EURUKFRANCE
INSTALL
• LANGUAGE
• COUNTRY
• AUTO STORE
• MANUAL STORE
• SORT
•
NAME
BBC_1
MENUMENUMENU
5
Using other menus
Choosing a language and country
Automatic tuning
& Press the
H
key to display the main menu.
é Select INSTALL (
J
), then press
L
.
The INSTALL menu appears.
The LANGUAGE option is activated.
“ Press
L
to go into the LANGUAGE menu.
‘ Select your language with the
IJ
keys.
The menus will appear in the chosen language.
( Press
K
to exit the LANGUAGE menu.
§ Select the option COUNTRY and press
L
.
è Select your country with
IJ
keys (GB).
If your country does not appear in the list, select “.. .”
! Press
K
to exit the COUNTRY menu.
ç To exit from the menus, press
R
.
This menu allows you to automatically search
for all the programmes available in your region
(or on your cable network).
& First carry out operations & to ! above, then:
é Press
J
once to select AUTO STORE then
press
L
.The search begins.
After several minutes, the INSTALL menu
reappears automatically.
“ If the transmitter or the cable network
broadcasts the automatic sort signal, the
programmes will be correctly numbered.
‘ If not, the programmes found will be
numbered in descending order starting at 99,
98, 97,etc. (or 79, 78,...).
Use the SORT menu to renumber them.
Some transmitters or cable networks broadcast
their own sort parameters (region, language, etc.).
Where this is the case, make your choice using the
IJ
keys and confirm with
L
.
To exit or interrupt the search, press the
H
key. If
no picture is found, refer to the chapter entitled
Tips on p. 14.
( To exit from the menus, press
R
.
PICTURE
• BRIGHTNESS
• COLOUR
• CONTRAST --I------ 39
• SHARPNESS
• STORE
• PICTURE
• SOUND
• FEATURES
• INSTALL
INSTALL
• LANGUAGE
• COUNTRY
• AUTO STORE
• MANUAL STORE
• SORT
•
NAME
ENGLISH
DANSK
NEDERLANDS
INSTALL
• LANGUAGE
• COUNTRY
• AUTO STORE
• MANUAL STORE
• SORT
•
NAME
SEARCHING
PLEASE WAIT
PROG. NO.2
215.18 MHZ
Directions for use
Page 9
Directions for use
8
Timer function
Locking the set
This menu allows you to use your TV as an
alarm clock.
& Press
H
.
é Select FEATURES (
J
) and press
L
twice.
The TIMER menu appears :
“ Press
L
to enter and exit the sub-menus and
use keys
IJ
or
09
to adjust:
‘ TIME: enter current time.
Note:
the time is updated automatically each time
the set is switched on using teletext information
taken from programme 1. If programme 1 does
not have teletext, the update will not take place.
( START TIME: enter the start time.
§ STOP TIME: enter the stop time.
è PROG; NO;: enter the number of the
programme required.
! ACTIVATE: you can set the alarm to be
activated:
• ONCE ONLY for a one-off alarm,
• DAILY for a daily alarm or
• STOP to cancel.
ç Press
R
to set the TV to standby.It will
automatically switch on at the time
programmed. If you leave the TV switched on,
it will only change programme at the time
indicated.
The combination of the CHILD LOCK and TIMER
functions may be used to limit the length of time
your television is in use, for example, by your
children.
You can bar access to certain programmes or
completely lock the set by locking the keys.
Locking programmes
& Press
H
.
é Select FEATURES (
J
) and press
L
.
“ Select PARENTAL. CONT.(
J
) and press
L
.
‘ Enter your confidential access code.The first
time, enter the code 0711 then confirm by
re-entering 0711.The menu appears.
( Press
L
to go into the menu.
§ Use keys
IJ
to select the required
programme and confirm with
L
.The symbol
+
is displayed alongside the programmes or
sockets that have been locked.
è Press
R
to exit.
To watch a programme which has been locked
you will now need to enter the confidential
code; otherwise the screen will remain blank.
Caution:
in the case of encrypted programmes
which use an external decoder, it is necessar y to
lock the corresponding EXT socket.
To unlock all programmes
Repeat stages & to ‘ above, then select
CLEAR ALL and press
L
.
To change the confidential code
Repeat stages & to ‘ above, then:
( Select CHANGE CODE and enter your own
4-digit number.
§ Confirm by entering it again.
Your new code will be stored.
è Press
R
to exit from the menus.
Locking the keys
& Press
H
, select FEATURES (
J
) and press
L
.
é Select CHILD LOCK (
J
) and press
L
.
“ Enter your confidential access code.
‘ Press
L
to set the lock to ON.
( Switch off the set and put the remote control
out of sight.
The set cannot be used (it can only be
switched on using the remote control).
§ To cancel:switch CHILD LOCK to OFF.
• PICTURE
• SOUND
• FEATURES
• INSTALL
FEATURES
TIMER
• TIME
• START TIME
• STOP TIME
• PROG; NO;
• ACTIVATE
10:56
• PICTURE
• SOUND
• FEATURES
• INSTALL
FEATURES
• TIMER
• CHILD LOCK
• PARENTAL CONT
• ROTATION
ACCES CODE
- - - -
7
Adjusting the picture
Adjusting the sound
& Press
H
then
L
.
The PICTURE menu appears :
é Use
IJ
keys to select a setting and
KL
keys to adjust.
Note:
the menu is a scroll-down menu.
Keep the key
J
held down to access the settings
hidden at the bottom of the screen.
“ Once the necessary adjustments have been
made, select the option STORE and press
L
to store them.
‘ To exit from the menus, press
R
.
Description of the settings:
• BRIGHTNESS: alters the brightness of the
image.
• COLOUR: alters the colour intensity.
• CONTRAST: alters the variation between
light and dark tones.
• SHARPNESS: alters the crispness of the
image.
• STORE:stores the picture settings.
• COLOUR TEMP (colour temperature):
adjusts the colour temperature of the
picture.Three options are available here:
COOL (blue white), NORMAL (balanced) or
WARM (red white).
• NR (Noise Reduction): alleviates fuzziness
(snowy picture).This setting is useful when
reception is difficult.
& Press
H
, select the SOUND option (
J
) and
press
L
.The SOUND menu appears :
é Use
IJ
keys to select a setting and keys
KL
to adjust.
Note:
to access the AVL setting (hidden at the
bottom of the screen) hold down
J
key.
“ Once the necessary adjustments have been
made, select the option STORE and press
L
to store them.
‘ To exit from the menus, press
R
.
Description of the settings:
• TREBLE: alters the levelof the high frequency
sound.
• BASS: alters the levelof the low frequency
sound.
• BALANCE: to balance the sound between
the left and right speakers.
• DELTA VOLUME (volume difference):allows
you to compensate for the volume differences
between the different programmes or the
EXT sockets.This setting is available for
programmes 1 - 40 and the EXT sockets.
• STORE:stores the sound settings.
• AVL (Automatic Volume Leveller): automatic
volume control used to avoid sudden
increases in volume, particularly when
changing programmes or during
advertisements
Rotating the picture
Larger screens are sensitive to variations in
the earth's magnetic field.This setting makes it
possible to compensate for this phenomenon.
& Press
H
.
é Select FEATURES (
J
) and press
L
.
The FEATURES menu appears.
“ Use
J
key to select ROTATION and use
KL
keys to alter the angle of the image.
‘ Press
R
to exit from the menus.
(only available on certain versions)
• PICTURE
• SOUND
• FEATURES
• INSTALL
PICTURE
• BRIGHTNESS
• COLOUR
• CONTRAST
• SHARPNESS
• STORE
• COLOUR TEMP.
• NR
--I------ 39
• PICTURE
• SOUND
• FEATURES
• INSTALL
SOUND
• TREBLE
• BASS
• BALANCE
• DELTA VOLUME
• STORE
• AVL
-----I--- 56
GB 9A10E3.
Page 10
GB 10A10E3.
10
16:9 Formats
The pictures you receive may be transmitted in 16:9 format (wide screen) or 4:3 format
(conventional screen). 4:3 pictures sometimes have a black band at the top and bottom of the screen
(letterbox format).This function allows you to optimise the picture display on screen.
Automatic switching
This TV set is also equipped with automatic switching which will select the correct-screen format,
provided the specific signals are transmitted with the programmes.
This automatic format can olso be modified manually.
Using the different screen formats
Press the
L
key (or
K
) to select the different modes:
4:3, ZOOM 14:9,ZOOM 16:9, SUBTITLE ZOOM, SUPER ZOOM and WIDE SCREEN.
You can also access these settings with key
P
.
4:3 Mode
The picture is reproduced in 4:3 format and a black band
is displayed on either side of the picture.The picture may
be progressively enlarged using the
IJ
keys.
ZOOM 14:9 Mode
The picture is enlarged to 14:9 format, a thin black band
remains on both sides of the picture.The keys
IJ
allow
you to move the image up or down to view subtitles.
ZOOM 16:9 Mode
The picture is enlarged to 16:9 format.This mode is
recommended when displaying pictures which have black
bands at the top and bottom (letterbox format).
Use the
IJ
keys if you wish to display sub-titles.
SUBTITLE ZOOM Mode
This mode is used to display 4:3 pictures using the full
surface of the screen leaving the sub-titles visible.
Use the
IJ
keys to increase or decrease the section at
the bottom of the picture.
SUPERWIDE Mode
This mode is used to display 4:3 pictures using the full
surface of the screen by enlarging the sides of the picture.
The keys
IJ
allow you to move the image up or down to
view subtitles.
WIDE SCREEN Mode
This mode restores the correct proportions of pictures
transmitted in 16:9 using full screen display.
Note:
If you display a 4:3 picture in thid mode, it will be
enlarged horizontally.
MENU
9
Teletext
Teletext is an information system, broadcast by certain channels, which can be read like a newspaper. It
also provides subtitles for people with hearing difficulties or those who are unfamiliar with the
language in which a particular programme is being broadcast (cable networks, satellite channels, etc.).
Switch teletext on/off
To call up or exit from teletext. At first, the main index page appears
with a list of the items available. Each page has a corresponding 3-
figure number.
If the selected channel does not broadcast teletext, 100 will appear and
the screen will remain blank (in this case, exit from teletext and choose
another channel).
Selecting a teletext page
Use keys
0
to
9
or
@
P
#
to enter the page number required.
For example: for page 120, press
120
.
The number is displayed in the top left-hand corner, the page counter
starts searching and the page is displayed.Repeat the procedure to
consult another page.
If the counter continues searching, this means that the selected page is not
broadcast. Choose another number.
Direct access to subject headings
Coloured zones are displayed at the bottom of the screen.The 4
coloured keys give access to the corresponding subjects or pages.
The coloured zones flash when the subject or the page is not yet available.
Stop the sequence of sub-pages
Some pages contain sub-pages which follow on automatically from
one another.This key allows sub-page sequence to be enabled or
disabled.The
_
sign appears in the top left hand corner.
Table of contents
To return to the table of contents (normally page 100).
Page enlargement
Press this key to display the upper, then lower part of the screen,and
then to return to the normal page size.
Reveal
Use this key to reveal/conceal hidden information (answers to puzzles).
Overlaying text on the TV picture
To activate or deactivate screen overlay.
Favourite pages
(available only on certain models)
For teletext programmes 1 to 40, you can store 4 favourite pages
which you can then access via the coloured keys.
& Press
H
.
é Enter the number of the page required.
“ Press
R
then the coloured key of your choice.The page is stored.
‘ Repeat steps é and “ for the other coloured keys.
( From now on, when you consult teletext, your favourite pages appear
in colour at the bottom of the screen.
To get back to the normal subject headings, press
H
.
To remove these settings, hold
R
down for 5 seconds.
Directions for use
.
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3
6
SMART
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5
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TV
VCR
DVD
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Page 11
Directions for use
I.S.
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12
Connecting peripheral equipment
The television has 2 external sockets situated at the back of the set (EXT1 and EXT2).
The EXT1 socket has audio and video inputs/outputs and RGB inputs.
The EXT2 socket has audio and video inputs/outputs and S-VHS inputs.
Video recorder (only)
Carry out the connections featured opposite. Use a good
quality euroconnector cable.
If your video recorder does not have a euroconnector socket, the
only connection possible is via the aerial cable.You will therefore
need to tune in your video recorder's test signal and assign it
programme number 0 (refer to manual store, p. 6).
To reproduce the video recorder picture,press
0
.
Video recorder with decoder
Connect the decoder to the second euroconnector socket
of the video recorder. You will then be able to record
scrambled transmissions.
Video recorder
Satellite receiver, decoder, CDV,games, etc.
Carry out the connections featured opposite.
To optimise picture quality, connect the equipment which
produces the RGB signals (digital decoder, games, etc.) to
EXT1, and the equipment which produces the S-VHS
signals (S-VHS and Hi-8 video recorders, certain CDV
drives) to EXT2 and all other equipment to either EXT1
or EXT2.
Other equipment
To select connected equipment
Press the
N
key to select EXT1, EXT2, S-VHS2 (S-VHS signals from
the EXT2 socket) and EXT3 for connections on the front panel.
Most equipment (decoder, video recorder) carries out the switching itself.
VCR
EXT 2
EXT 1
11
WIDE SCREEN
4 : 3
SUPERWIDE
SUBTITLE ZOOM
PLEIN ÉCRAN
Subtitles
4 : 3
ZOOM 14 : 9
Selecting the correct mode
Different modes can be selected to suit different picture formats,
use the following diagrams as a guide to which mode to use.
ZOOM 16 : 9
&
4:3 Picture
There are 5 possible modes for this type of picture
é
4:3 Picture Letterbox
“
16:9 Picture
x2
x1
4 : 3
Progressive zoom
GB 11A10E3.
MENU
MENU
MENU
MENU
Page 12
GB 12A10E3.
14
Tips
Glossary
Poor reception
The proximity of mountains or high buildings
may be responsible for ghost pictures,
echoing or shadows. In this case, try manually
adjusting your picture: see "fine tuning" (p.6)
or modify the orientation of the outside
aerial. Does your antenna enable you to
receive broadcasts in this frequency range
(UHF or VHF band)?
In the event of difficult reception (snowy
picture) switch the NR on the PICTURE
menu to ON. (p. 7).
No picture
Have you connected the aerial socket
properly? Have you chosen the right system?
(p. 6) Is the contrast or the brightness badly
adjusted ? Press
F
and readjust the
PICTURE menu. Poorly connected
euroconnector cables or aerial sockets are
often the cause of picture or sound problems
(sometimes the connectors can become half
disconnected if the TV set is moved or
turned). Check all connections.
Peripheral equipment gives a black and
white picture
You have not selected the right socket with
the
N
key: S-VHS2 instead of EXT2.
To play a video cassette, check that it has
been recorded under the same standard
(PAL,SEC AM, NTSC) which can be replayed
by the video recorder.
The remote control no longer works.
Check that the mode selector on the side of
the remote control is set to TV.
No sound
If on certain channels you receive a picture
but no sound, this means that you do not
have the correct TV system. Modify the
SYSTEM setting (p. 6).
Remote control
The TV set does not react to the remote
control; the indicator on the set no longer
flashes when you use the remote control?
Replace the batteries.
Standby
When you switch the TV set on it remains in
standby mode and the indication LOCKED is
displayed when you use the keys on the TV set?
The CHILD LOCK function is switched on (p. 8).
If the set receives no signal for 15 mins, it
automatically goes into standby mode.
To save power,your set is fitted with components
that give it a very low power consumption when
in standby mode (less than 3 W).
Cleaning the set
Only use a clean, soft and lint-free cloth to
clean the screen and the casing of your set.
Do not use alcohol-based or solvent-based
products.
Still no results?
If your TV set breaks down, never attempt to
repair it yourself: contact your dealer's after-
sales service.
RGB Signals: These are 3 Red, Green and Blue video signals which directly drive the red, green and
blue emitters in the cathode ray tube. Using these signals provides better picture quality.
S-VHS Signals: These are 2 separate Y/C video signals from the S-VHS and Hi-8 recording standards.
The luminance signals Y (black and white) and chrominance signals C (colour) are recorded
separately on the tape.This provides better picture quality than with standard video (VHS and 8
mm) where the Y/C signals are combined to provide only one video signal.
NICAM sound: Process by which digital sound can be transmitted.
System: Television pictures are not broadcast in the same way in all countries.There are different
standards: BG, DK, I, and L L’. The SYSTEM setting (p. 4) is used to select these different standards.
This is not to be confused with PAL or SECAM colour coding. Pal is used in the majority of
European countries, Secam in France, the CIS and the majority of African countries.
The United States and Japan use a different system called NTSC.The inputs EXT1 and EXT2 are
used to read NTSC coded recordings.
16:9: Refers to the ration between the length and height of the screen.
Wide screen televisions have a ration of 16/9,conventional screen TV sets have a ration of 4/3.
13
TV / VCR / DVD mode selector
Connect other appliances as shown opposite.
Select EXT 3 by pressing
N
.
For a monophonic camera, connect the sound signal to the
AUDIO L input. Use the
E
key to reproduce the sound
through the left and right TV speakers.
Headphones
Keys
@”#
allow you to adjust the volume on the
headphones and on the set. Press
m
if you want to cut off
the sound on the set.
The headphones must have an impedance of between 32 and
600 ohms.
Connecting other appliances
& Set the switch on the side of the remote control to
the required mode:TV,VCR (video recorder) or DVD.
é Then press one of the following keys:
standby
contrast + setting *
enter a number
bring up a menu *
select (
IJ
) and set (
KL
) *
select programme,
· record *,
¢ rewind,
Ê stop,
Æ play,
∫ fast forward,
% programming *,
OK
confirm*
∆ pause
* Some programming functions are not available on all
models (cursors, menu, OK key, etc.).
The remote control is compatible with all the video
recorders in our range as well as models which use the
RC5 signalling standard.
The remote control allows you to control the main functions of your video recorder or DVD.
Directions for use
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.
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3
6
8
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VCR
DVD
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Page 13
Mechanical instructions
4.Mechanical instructions
4.1Accessing the service connector (for ComPair)
1. Connect the ComPair cable to connector 0229 (in front of
the Tuner).
2. Start ComPair and perform the diagnosis (for more info see
chapter 5).
4.2Removing the Rear Cover
1. Remove all the fixation screws of the rear cover.
2. Now the rear cover can be removed.
4.3Service position
GB 13A10E4.
1
2
1
A
3
4
CL 06532012._002.eps
B
030200
The following PWB's are present in this chassis (see also
'Chassis overview', chapter 1):
1. Large Signal Panel (LSP)
2. Small Signal Board (SSB)
3. Top Control panel
4. CRT panel (or PTP)
5. Side I/O panel
6. Mains Switch/LED panel
4.3.1Service position LSP
Position 1: For better accessibility of the LSP, do the following:
SSB
LSP
1
2
2
1
LSP - bracket
Bottom tray
CL 06532012_001.eps
030200
Figure 4-2
1. Disconnect the degaussing coil from the LSP by removing
the cable on connector 0211 (1).
2. Release some of the wiring from their fixation clamps, in
order to get room for repositioning the LSP.
3. Turn the chassis tray 90 degrees counter clockwise (2).
4. Flip the tray with the rear I/O panel towards the CRT (3).
5. Place the hook of the tray in the fixation hole at the right
side of the cabinet bottom (4) and pull the chassis tray
forward.
4.3.2Service position SSB
In fact there is no predefined service position for the bottom (B) side of the SSB. All relevant test points can be accessed in
both service positions.
If IC's must be replaced: take the complete panel out of the
SIMM-connector.
1. Put the LSP in service position 1 (as described above).
2. Release the 2 metal clamps at both sides of the SIMMconnector and the complete SSB can be taken out. It
'hinges' in the SIM-connector.
4.3.3Accessing the Top Control panel
Figure 4-1
1. Remove the LSP-bracket from the bottom tray by pulling it
backwards.
2. Hook the bracket in the first row of fixation holes of the
cabinet bottom. In other words reposition the bracket from
(1) to (2).
Position 2: To get access to the bottom side (solder side) of the
LSP, do the following:
M
Top control board
CL 06532012_003.eps
030200
Figure 4-3
1. Remove the two fixation screws, which hold the panel.
2. Pull the board backward (w.o.w. release it from the front
hinge).
Page 14
GB 14A10E4.
4.3.4Accessing the Side I/O panel
Mechanical instructions
CL 06532012_004.eps
Figure 4-4
1. The complete Side I/O-assembly can easily be removed by
unscrewing the 2 fixation screws.
2. The board can easily be lifted out of the bracket after
releasing the 2 fixation clamps.
4.3.5Accessing the Mains Switch/LED panel
111
2
030200
CL 06532012_006.eps
Figure 4-6
1. For easy measurements, panel can be clicked to the LSP
bracket.
4.4Mounting the Rear Cover
Before mounting the Rear Cover, some checks has to be
performed:
•Check whether the Mains Cord is mounted correctly in the
guiding brackets.
•Check whether all cables are replaced in their original
position.
030200
3
3
CL 06532012_005.eps
030200
Figure 4-5
1. Release the two fixation clamps (1) by pushing them
upward.
2. At the same time, the complete assy must be pulled
backward (2).
3. If the board has to be removed, release the 2 clamps at the
sides of the bracket and lift panel out (3).
Page 15
Service Modes, error messages and repair tips
5.Service Modes, error messages and repair tips
GB 15A10E5.
In this chapter the following paragraphs are included:
5.1 Test points
5.2 Service Modes and Dealer Service Tool (DST)
5.3 Error code buffer and error codes
5.4 The “blinking LED” procedure
5.5 Trouble shooting tips
5.6 Customer Service Mode
5.1Test points
The A10 chassis is equipped with test points in the service
printing. These test points are referring to the functional blocks:
•A1-A2-A3, etc.: Test points for the audio processing
circuitry [A6, C6]
•C1-C2-C3, etc.: Test points for the control circuitry [C8]
•F1-F2-F3, etc.: Test points for the frame drive and frame
output circuitry [A3]
•I1-I2-I3, etc.: Test points for the intermediate frequency
circuitry [A4, C1]
•L1-L2-L3, etc.: Test points for the line drive and line output
circuitry [A2]
•P1-P2-P3, etc.: Test points for the power supply [A1]
•S1, S2, S3, etc.: Test points for the synchronisation
circuitry [C1]
•V1-V2-V3, etc.: Test points for the video processing
circuitry [B, C2, C3]
Measurements are performed under the following conditions:
Video: colour bar signal; audio: 3kHz left, 1kHz right
5.2Service modes and Dealer Service Tool (DST)
For easy installation and diagnosis the dealer service tool
(DST) RC7150 can be used. When there is no picture (to
access the error code buffer via the OSD), DST can enable the
functionality of displaying the contents of the entire error code
buffer via the blinking LED procedure.
5.2.1Installation features for the dealer
The dealer can use the RC7150 for programming the TV-set
with presets. 10 Different program tables can be programmed
into the DST via a GFL TV-set (downloading from the GFL to
the DST; see GFL service manuals) or by the DST-I. For
explanation of the installation features of the DST, the
directions for use of the DST are recommended (For the A10
chassis, download code 4 should be used).
5.2.2Diagnose features for the service engineer
A10 sets can be put in the two service modes via the RC7150.
These are the Service Default Mode (SDM) and the Service
Alignment Mode (SAM). SDM can also be entered by short
circuiting the jumpers 9261 and 9262 on the chassis with a
screwdriver.
Service Default Mode (SDM)
The purpose of the SDM is:
– provide a situation with predefined settings to get the same
measurements as in this manual
– start the blinking LED procedure
– have the possibility to override the 5V protection
Entering the SDM:
– By transmitting the "DEFAULT" command with the RC7150
Dealer Service Tool (this works both while the set is in
normal operation mode or in the SAM)
– Standard RC sequence 0-6-2-5-9-6 followed by pressing
the “MENU”-button
– By shorting jumpers 9261 and 9262 on the monocarrier
while switching on the set
By temporarily shorting jumper 9261 and 9262 when switching
on the set, the 5V protection is disabled.
CAUTION ! Overriding the 5V protection should only be used
for a short period of time. In case of S/W protections ( error 14 ) the set will shutdown after 15 sec.
For recognition of the SDM, “SDM” is displayed at the upper
right side of the screen.
SDM Menu
HRS: 0001 SWID: A10 EU1-2.7
ERR: 0 0 0 0 0 0 0
SDM
PICTUREBRIGHTNESS
+
SDM
SOUNDCOLOURNESS
MENU
FEATURESCONTRAST
INSTALLSHARPNESS
CL 06532012_008.eps
Figure 5-1
Exit the SDM:
– Press the “EXIT”-button on the DST
– Switch the set to Standby (the error buffer is also cleared)
Note: When the mains power is switched off while the set is in
SDM, the set will switch to SDM immediately when the mains
is switched on again.
The SDM sets the following pre-defined conditions:
•PAL/Secam sets: tuning at 475.25 MHz PAL
•NTSC sets: tuning at channel 3 (61.25MHz)
Volume level is set to 25% (of the maximum volume level).
Other picture and sound settings are set to 50%. The following
functions are switched off in SDM (and after leaving SDM):
•Timer
•Sleep timer
The following functions are disabled during SDM (and enabled
after leaving SDM)
•Parental lock
•Blue mute
•Hospitality Mode
•No-ident Timer (normally the set is automatically switched
off when no video signal (IDENT) was received for 15
minutes).
All other controls operate normally.
Special functions in SDM
Access to normal user menu
Pressing the “MENU” button on the remote control switches
between the SDM and the normal user menus (with the SDM
mode still active in the background)
Channel search
Pressing the “P+” button of the remote control starts a tuning
search. Search is indicated by a blinking LED (this stops when
a transmitter is found; the transmitter is stored on the highest
channel number, typically this is 99 and the TV switches to this
preset)
SDM
STORE
030200
Page 16
GB 16A10E5.
Service Modes, error messages and repair tips
Error buffer
Pressing the “OSD” button of the remote control shows/hides
the error buffer. OSD can be hidden to prevent interference
with oscillogram measurements.
Access to SAM
By pressing the “VOLUME +” and “VOLUME -“ buttons on the
local keyboard simultaneously the set switches from SDM to
SAM.
Service Alignment Mode (SAM)
The purpose of the SAM is:
– to do alignments
– Change option settings
– display/clear the error code buffer values.
CLEAR ERRORS
OPTIONS
AKB OFF
VSD OFF
TUNER
WHITE TONE
GEOMETRY
SOUND
SMART SETTING
MENU
STORE
234
SAM
SAM
Entering SAM:
– By transmitting the "ALIGN" command with the RC7150
Dealer Service Tool (this works both while the set is in
normal operation mode or in the SDM)
– By pressing the “VOLUME +” and “VOLUME -” key on the
local keyboard simultaneously when the set is in SDM
– Standard RC sequence 0-6-2-5-9-6 followed by pressing
the “OSD”-button
Exit SAM:
Switch the set to Standby (the error buffer will be erased)
Note: When the mains power is switched off while the set is in
SAM, the set will enter to SAM immediately when the mains is
switched on again.
In the SAM the following information is displayed on the screen:
SAM
SAM
SAM
MENU
MENU
NPRG
WSSB
SYSTEM
OB1
OB2
TUNER
IF-PLL OFFSET
AFC WINDOW
AGC
AFA
AFB
MENU
NORMAL RED
KHZ(100/250)
5
SAM
SAM
SAM
CL 06532012_009.eps
180200
MENU
MENU
MENU
VER-AMPL
SOUND
NIC-FMAM
PS-FM
PS-NIC-BGDK
PS-NIC-I
RICH
RICH BGT
RICH COL
RICH CON
RICH SHP
RICH HUE
Figure 5-2
Page 17
Service Modes, error messages and repair tips
GB 17A10E5.
Explanation notes/references:
1. Operation hours timer (hexadecimal)
2. Software identification of the main micro controller
(A10BBC-X.Y)
•A10 is the chassis name for A10
•BBC is 2 letter and 1 digit combination to indicate the
software type and the supported languages:
•X = (main version number)
•Y = (subversion number)
3. Error buffer (7 errors possible)
4. Option bytes (8 codes possible), summary of options are
explained below
5. Sub menus are listed in a scroll-menu.
SAM menu control
Menu items can be selected with the cursor UP/DOWN key.
The selected item will be highlighted. When not all menu items
fit on the screen, moving the cursor UP/DOWN will display the
next/previous menu items.
With the cursor LEFT/RIGHT keys, it is possible to:
– (de)activate the selected menu item (e.g. GEOMETRY)
– change the value of the selected menu item ( e.g VER-
SLOPE )
– activate the selected submenu (e.g SERV-BLK)
Access to normal user menu
Pressing the “MENU” button on the remote control switches
between the SDM and the normal user menus (with the SAM
mode still active in the background). Pressing the “MENU” key
in a submenu will go to the previous menu.
The menus and submenus
CLEAR ERRORS
Erasing the contents of the error buffer. Select the CLEAR
ERRORS menu item and press the MENU RIGHT key. The
contents of the error buffer is cleared.
The functionality of the OPTIONS and ALIGNMENTS
(TUNER, WHITE TONE, GEOMETRY, SOUND and SMART
SETTING) sub menus is described in chapter 8.
5.3Error code buffer and error codes
5.3.1Error code buffer
The error code buffer contains all errors detected since the last
time the buffer was erased. The buffer is written from left to
right. when an error occurs that is not yet in the error code
buffer, the error is written at the left side and all other errors
shift one position to the right.
The error code buffer will be cleared in the following cases:
– by activating the “CLEAR ERRORS” in SAM menu
– exiting SDM or SAM with the “Standby" command on
the remote control
– transmitting the commands “DIAGNOSE 99 OK” with
the DST (RC7150) or with ComPair
– Automatically reset if its contents has not changed for 50
hours
By leaving SDM or SAM with the mains switch, the error buffer
is not reset.
Examples:
ERROR: 0 0 0 0 0 0 0 : No errors detected
ERROR: 6 0 0 0 0 0 0 : Error code 6 is the last and only
detected error
ERROR: 9 6 0 0 0 0 0 : Error code 6 was first detected and error
code 9 is the last detected (newest) error
The contents of the error buffer can also be made visible
through the “blinking LED” procedure. This is especially useful
when there is no picture. See paragraph 5.4 “The blinking LED
procedure “.
5.3.2Error codes
In case of non-intermittent faults, clear the error buffer before
starting the repair, to prevent that “old” error codes are present.
If possible check the entire content of the error buffers. In some
situations an error code is only the result of another error code
(and not the actual cause).
Note: a fault in the protection detection circuitry can also lead
to a protection.
Error 0 = No error
Error 1 = X-ray protection, E/W protection and/or IBeam
X-ray protection, E/W protection and/or IBeam; set is switched
to protection; error code 1 is placed in the error buffer; the LED
will blink 1 time (repeatedly). If this happens, isolate each
circuit to determine the cause. These circuits are:
•X-Ray protection - PROTN
If this protection is active, the most likely cause is the LOT.
Detection via pin 3 of the BOCMA - item 7301.
•EW protection - PROT-UP
If this protection is active, the causes could be one of the
following;
•short circuit of:
– flyback diode 6414
– EW transformer (bridge coil) 5478/5479 or 5474/5475/
5476 (version dependent)
– EW driver 7470
•High beam current protection - IBeam
As the name implies, the cause of this protection is a too high
beam current (bright screen with flyback lines). Check whether
the +200V supply to the CRT panel is present. If the voltage is
present, the most like cause is the CRT panel or the picture
tube. Disconnect the CRT panel to determine the cause. If the
+200V voltage is not present, check R3840 at CRT-panel and
R3445 & D6445 at main panel.
Error 2 = Vertical protection - VFB
If this protection is active, the cause could be one of the
following (most likely in the vertical output stage):
– 7501 is faulty
– poor contact or open circuit of deflection coil
– +13V-VERT and/or -13V not present
Error 3 = Reserved
Error 4 = +5V protection
5V protection active; set is switched to protection; error code 4
is placed in the error buffer; the LED will blink 4 times
(repeatedly). A 5V failure can cause a drop in the 5V supply
output, resulting in an undefined behaviour of the set.
Therefore, all I
2
C devices connected to the 5V supply are
constantly monitored. When none of these devices responds to
the micro controller for a prolonged time, the micro controller
assumes that there is a failure in the 5V supply.
By starting up the set with the service jumpers shorted, the 5V
protection is disabled and it is easier to determine the cause.
+5V protection will be activated when these I
2
I
C communication):
2
•Main Tuner 1125 on main panel
•ITT sound processor MSP34xx ( 7064 ) on the SSB
The following tips are useful to isolate the problem area after
overriding the +5V protection. Determine whether:
1. The +5V source is working properly; isolate coil 5430 and
jumper 9044 and measure the +5V
2. ITT sound processor circuit is loading the +5V; isolate coil
5430
3. The tuner is loading the +5V source; isolate jumper 9044
4. Main tuner circuit is loading the +5V source; isolate coil
5261
C devices fail (no
Page 18
GB 18A10E5.
Service Modes, error messages and repair tips
Caution! Overriding the 5V protection when there is a 5V failure
can increase the temperature in the set and may cause
permanent damage to components. Do not override the 5V
protection for a prolonged time.
Error 5 = Reserved
Error 6 = General I
2
C error. This will occur in the following
cases:
•SCL or SDA is shorted to ground
•SCL is shorted to SDA
•SDA or SCL connection at the micro controller is open
circuit.
Error 7 = BC-loop not stabilised ( BCF = 1 ) Black current loop
instability protection. The possible cause could be a defect in
one or more of the RGB amplifiers, RGB guns or RGB driving
signals.
Error 8 = BOCMA IC TDA888xx I
BOCMA ( item 7301 on SSB ) is corrupted or the I
2
C communication failure.
2
C line to the
BOCMA is low or no supply voltage present at pin 14 and/or
pin 60 (3V3)
Error 9 = BOCMA IC TDA888xx 8V failure ( SUP bit ). No
supply voltage at pin 53. Check NFR 3331 and coil 5333.
Error 10 =NVM I
2
C error. NV memory (EEPROM - item 7066)
does not respond to the micro controller.
Error 11 = micro controller / NV Memory identification error.
During the last start-up the NVM and the micro controller did
not recognize each other (e.g. one of them was replaced or the
NVM memory has been changed/adapted or lost), therefore
the NVM was loaded with default values.
Error 12 = Microprocessor ( Painter - item 7064) internal RAM
test failure.
Error 13 =Main Tuner I
is corrupted or the I
votage at pin 9, pin 6 or 7 of the tuner.
Error 14 =Sound processor I
2
C failure UV13xx. Tuner ( item 1225 )
2
C line to the Tuner is low or not supply
2
C error (MSP34xx - ). Sound
controller MSP3400 or MSP3410 does not respond to the
micro controller.
Error 15 =SRAM IC uPD431000A-B test failure ( item - 7070 ).
Error 16 =PIP/DW Tuner I
2
C error. The Tuner ( TEDE9 - item
1900 ) on the PIP-panel does not respond to the micro
controller.
Error 17 = PIP IC M65669SP I
Window IC SAB9081 I
Error18 = I/O expander IC 62320P I
PIP panel ).
Error 19 = Guide+ I
2
C failure ( LC27016B - item 7005 ). USA
only.
Error 20 = V-chip for PIP, IC ZILOG 86130 I
Error 21 = NV clock IC MK41T56 I
2
C failure ( item 7803 ) or Double
2
C failure.
2
C failure ( item 7910 on
2
2
C failure USA only.
C failure at mono board Item 7011 at A7.
Error 22 = Reserved.
Error 23 = Second BOCMA IC TDA888xx ( on DW panel ) I
2
C
communication failure.
Error 24/29 = Reserved.
– Error codes 1,2, and 4 are protection codes and in this case
supplies of some circuits will be switched off. Also in
protection, the LED will blink the number of times
equivalent to the most recent error code.
5.3.3Error code table
Error code Error descriptionPossible defective components
0No error detected1X-ray protection/ EW and/or High beam
protection active
2Vertical protectionVertical circuit is defective
3Reserved
45V protection active+5V supply line is low or short circuit
5Reserved
6General I
7BC-loop not stabilised RGB amplifiers, RGB guns or RGB driving signals of BOCMA
8BOCMA I
9BOCMA 8V supply failure IC 7301 and R3331
10NVM I
11NVM identification failureIC7066
12uProcessor internal RAM test failure IC 7064
13Main Tuner I
14Sound processor I
15SRAM I
16PIP tuner I
17PIP IC I
18I/O expander IC 62320P I
19Guide+ I
20V-chip for PIP - I
21NV clock - I
22Reserved
23Second BOCMA IC on DW panel - I
LOT, Line deflection circuit, EW-circuit or CRT amplifier circuit, picture tube or +200V missing
2
C bus error I2C bus s/c or o/c on uP
2
C errorIC 7301
2
C error IC7066
2
C errorIC 1225 - UV13xx
2
C errorIC 7 (2CS/Nicam)
2
C errorIC 7070
2
C errorIC 1900 - TEDE9
2
C error or DW IC I2C errorIC M656695P or IC SAB9081
2
C errorIC 62320P - item 7910
2
C errorIC LC27016B - item 7005
2
C errorIC ZILOG 86130 -
2
C errorIC MK41T56 - item 7011
2
C error IC TDA888xx - item
Page 19
Service Modes, error messages and repair tips
GB 19A10E5.
5.4The “blinking LED” procedure
The contents of the error buffer can also be made visible
through the “blinking LED” procedure. This is especially useful
when there is no picture.
– When the SDM is entered, the LED will blink the number of
times, equal to the value of the error code.
When the SDM is entered, the LED will blink the contents of the
error-buffer. Error-codes ≥ 10 are shown as followed. A long
blink of 750 msec. which is an indication of the decimal digit,
followed by a pause of 1500 msec. followed by n short blinks.
When all the error-codes are displayed, the sequence is
finished with a LED display of 3 seconds. The sequence starts
again.
Example:
Error code position 1 2 3 4 5
Error buffer: 12 9 6 0 0
•after entering SDM: 1 long blink of 750 msec. + pause of
1500 msec + 2 short blinks - pause of 3 sec. - 9 short
blinks - pause of 3 sec. - 6 short blinks - pause of 3 sec. -
long blink of 3 sec. -- etc.
NOTE: If errors 1, 2 or 4 occurs the LED ALWAYS blinks the
last occurred error, even if the set in NOT in service mode.
5.5TROUBLE SHOOTING TIPS
In this paragraph some trouble shooting tips for the deflection
and power supply circuitry are described. For detailed
diagnostics, check the fault finding tree.
5.5.1THE DEFLECTION CIRCUIT:
– Measure if the VBAT (140V) is present across 2939/2940
(A1 POWER SUPPLY). If the voltage is not present,
disconnect jumper 9936 and 9937 ( see A1 Power Supply)
The whole Line Deflection stage is now disconnected. If the
voltage is present then the problem might be caused by the
deflection circuit. Possibilities:
– Transistor 7410 is defective
– The driver circuit around transistor 7481 is faulty
– No horizontal drive signal coming from the BOCMA IC
7301 pin 56 on the SSB
1. Note: If the C and E of 7410 are shorted, hick-up noise can
be heard from the power supply circuit.
2. To determine whether the fault is present in the line
deflection circuit (A2 LINE DEFLECTION) or in the EW
circuit/panel (screen size above 21”), insert jumper into
position numbers 9409 (in this case the EW protection is
disabled). If the basic deflection is working (picture is
parabolic distorted), then the fault is located in the EW
circuit/panel. If there is no hor. deflection, the fault is
present in the basic deflection circuitry.
3. Also take note of protection circuits in the line output stage.
If any of these circuits are activated, the set will shut down.
Depending on protections, the LED will blink according to
the fault defined. In order to determine which protection
circuit is active, isolation of circuits is necessary. These
protection circuits are:
4. High beam protection. See error 1 - IBeam.
5. X-ray protection : See error 1
If the high beam protection or the X-ray protection is active, it
will switch the set to protection and the SDM is activated. The
service LED blinks repetitively 1 time. If this happen, isolate
each circuit to determine the cause
problem might be caused on the primary side of the switching
supply. Check the output of the bridge diodes on the cathode
side of D6912/D6913 or D6915 - pin 1 for approximately 300V
DC. If this voltage is missing, check the bridge diodes and the
fuse. If fuse F1900 is found open, check IC7921 (circuit A1)
between pins 3 and 2 to make sure that there is no short circuit
present. If the 300V DC is present on pin 3 of IC7902, check for
a startup voltage of 16V on pin 4 of IC7921. If startup voltage
is not present, check if R3914 is open; a short circuit between
pin 4 and 5 will also cause this problem. It is necessary to have
a feedback signal from the hot secondary side of switch mode
transformer T5912 at pin 8 and pin 9 for the power supply to
oscillate. If this startup voltage is present on pin 4 of IC7902
and the supply is not oscillating, check R3929 and D6929.
The A10 power supply has been designed with Over Voltage
Protection (OVP). To determined whether OVP is active, check
whether VBAT - 141V is present at IC7971 pin 1. If not, check
the components D6938, C2939 and C2940 and L5941. If these
components are O.K., then check voltage at pin 3 of IC 7942.
If this voltage is not present check fuse 1941 and fuse 1942.
Replace if necessary. If dc-voltage is present at pin 3, replace
opto-coupler 7929.
Another way to confirm whether OVP is active, is to measure
the voltage with an oscilloscope at IC7902 pin 4. If the voltage
is fluctuating between 11-14V, then check the components as
described in the above mentioned paragraph.
5.6Customer Service Mode (CSM)
All A10.0 sets are equipped with the “Customer Service Mode”
(CSM). CSM is a special service mode that can be activated
and deactivated by the customer, upon request of the service
technician/dealer during a telephone conversation in order to
identify the status of the set. This CSM is a 'read only' mode,
therefore modifications in this mode are not possible.
5.6.1Entering the Customer Service Mode.
The Customer Service Mode can be switched on:
– by pressing simultaneously the Cbutton (MUTE) on the
remote control and any key on the control buttons (P+, P-,
VOL +, VOL -) on the TV for at least 4 seconds.
When the CSM is activated:
•picture and sound settings are set to nominal levels
•modes that interfere with the behaviour of the set are
switched off (sleep timer, auto standby, etc.)
5.6.2Exit the Customer Service Mode.
The Customer Service Mode will be switched off after:
– pressing any key on the remote control handset (except
“P+” or “P-”)
– switching off the TV set with the mains switch.
All settings that were changed at activation of CSM are set
back to the initial values
5.6.3The Customer Service Mode information screen
After switching on the Customer Service Mode the following
screen will appear.
5.5.2THE POWER SUPPLY.
To trouble shoot the A10 SMPS, first check the +5V_STBY
voltage on IC7968, pin 3/4. If this voltage is not present, check
fuse 1961 and D6961. If 1906 or D6917 is not open circuit, the
The Customer Service Menu shows the following information:
– Line 1 : “HRS : nnnnn” and SWID : “A10BBC-X.Y”
HRS : Hexadecimal counter of operating hours. (Standby hours
are not counted as operating hours) .
SWID : (Software identification of the main micro controller )
See paragraph 5.2. Details on available software versions can
be found in the chapter “Software Survey” of the publication
“Product Survey - Colour Television”.
– Line 2 : “CODES : xx xx xx xx xx xx xx ”
Error code buffer (see paragraph 5.3). Displays the last 7 errors
of the error code buffer.
– Line 3 : “OPT xxx xxx xxx xxx xxx xxx xxx xxx”
Option bytes. Software and hardware functionality of the A10.0
is controlled by option bits. An option byte or option number
represents 8 of those bits. Each option number is displayed as
a decimal number between 0 and 255. The set may not work
correctly when an incorrect option code is set. See chapter 8
for more information on correct option settings
– Line 4: “SYSTEM : EUROPE”
Indicates which colour and sound system is installed for this
preset:
– PAL BG
– PAL I
– PAL DK
– SECAM BG
– SECAM DK
– SECAM LL’
Complaints that may be caused by an incorrect system setting:
•no colours
•colours not correct
•unstable picture
•noise in picture
To change the system setting of a preset:
1. press the “MENU” button on the remote control
2. select the INSTALL sub menu
3. select the MANUAL STORE sub menu
4. select and change the SYSTEM setting until picture and
sound are correct
5. select the STORE menu item
– Line 5 : “NO SIGNAL”
Indicates that the set is not receiving an “ident” signal on the
selected source.
•no or bad antenna signal; connect a proper antenna signal
•antenna not connected; connect the antenna
•no channel / preset is stored at this program number; go to
the INSTALL menu and store a proper channel at this
program number
•the tuner is faulty (in this case the CODES line will contain
number 13 or 16); check the tuner and replace/repair if
necessary
Note: On some models, BLUE MUTE is displayed (if the BM
option is ON) when no signal is received.
– Line 6 : “TIMER ON ”
Indicates that the on/off timer is running. Complaints that may
be caused by the activation of the sleep timer.
CSM
070200
Without using the remote control of the local keybpard the set
is switching:
•on from standby:
•to a different channel
To switch off the activation timer:
1. select “TIMER” in the “FEATURE” menu
2. select “ACTIVATE’ in the “TIMER” menu
3. set to “OFF” with the left/right cursor keys
– Line 7 : “CHANNEL BLOCKED”
Indicates that all channels are locked except the selected
channel. Complaint that may be caused by locked channels:
– TV cannot be switched on from standby with the local
keyboard buttons
–“P+” and “P-“ buttons on local keyboard do not function
To disable the LOCK feature:
1. select ”FEATURE” menu (with the Remote Control)
2. select “LOCK” (with the RC)
3. set to “OFF”
– Line 8 : “NOT PREFERED”
Indicates that at least one channel is deleted as a preferred
channel (by default, all channels are skipped. Note that
“SKIPPED” will always be displayed in CSM unless all the
channels are not skipped. A channel can be added as a
selected channel to the list of preferred channels:
1. select “INSTALL” menu
2. select “CHANNEL EDIT”
3. select “ADD/DELETE”
4. set to “ADD” with the left/right cursor keys
– Line 9 : “HOTEL MODE ON”
Inidcates that the Hotel mode has been activated.
– Line 10 : “SOURCE”
Indicates which SOURCE is installed for this preset.
EXT1, SVHS2, EXT2, Tuner.
– Line 11 : “SOUND”
Inicates which sound mode is installed for this preset.
Mono, NICAM, Stereo, L1, L2, SAP, Virtual and Digital
– Line 12 : “VOLUME”
Value indicates level at entry CSM.
– Line 13 : “BALANCE”
Value indicates level at entry CSM.
– Line 14 : “HUE”
Value indicates level at entry CSM.
– Line 15 : “COLOR”
Value indicates level at entry CSM.
– Line 16 : “BRIGHTNESS”
Value indicates level at entry CSM.
– Line 17 : “CONTRAST”
Value indicates level at entry CSM.
5.6.4Solving other problems
TV switched off or changed channel without any user action
Set switches off after “TV SWITCHING OFF” was displayed
Auto standby switched the set off because:
•there was no ident signal for more than 15 minutes
•there was no remote control signal received or local key
pressed for > 2 hours
See chapter 8 for a description on the options to enable/disable
auto standby
Picture problems
Picture too dark or too bright
– Press “Smart Picture” button on the remote control. In case
the picture improves, increase / decrease the brightness
value or increase / decrease the contrast value. The new
“Personal Preference” value is automatically stored after 3
minutes
– After switching on the Customer Service Mode the picture
is OK. Increase / decrease the brightness value or increase
/ decrease the contrast value. The new “Personal
Preference” value is automatically stored after 3 minutes
Page 21
Service Modes, error messages and repair tips
White line around picture elements and text
– press “Smart Picture” button on the remote control. In case
the picture improves, decrease the sharpness value. The
new “Personal Preference” value is automatically stored
after 3 minutes
– after switching on the Customer Service Mode the picture
is OK. Decrease the sharpness value. The new “Personal
Preference” value is automatically stored after 3 minutes
Snowy picture
– check the “NOT TUNED” section of the Customer Service
Mode screen
Snowy picture and/or unstable picture
– a scrambled or decoded signal is received
Black and white picture
– press “Smart Picture” button on the remote control. In case
picture improves, increase the colour value. The new
“Personal Preference” value is automatically stored after 3
minutes
– after switching on the Customer Service Mode the picture
is OK. Increase the colour value. The new “Personal
Preference” value is automatically stored after 3 minutes
Menu text not sharp enough
– press “Smart Picture” button on the remote control. In case
the picture improves, decrease the contrast value. The new
“Personal Preference” value is automatically stored after 3
minutes
– after switching on the Customer Service Mode the picture
is OK. Decrease the contrast value. The new “Personal
Preference” value is automatically stored after 3 minutes
GB 21A10E5.
Sound problems
No sound or sound too loud (after channel change / switching
on)
– after switching on the Customer Service Mode the volume
is OK. Increase / decrease the volume level. The new
“Personal Preference” value is automatically stored after 3
minutes
Page 22
GB 22A10E5.
Personal notes:
Service Modes, error messages and repair tips
Page 23
Blockdiagram, supply diagram and testpointsoverviews.
6.Blockdiagram, supply diagram and testpointsoverviews.
Supply voltage diagram
23A10E6.
Large Signal Panel
POWER SUPPLY
A1
1941
VS
GND
1942
1961
3004
13
AC MAINS
INPUT
110V/220V
J
AC MAINS
*
INPUT
110V/220V
Front interface panel plus connections present.
*
28" + 32" PW6305
0211
1
2
15
18
FRONT INTERFACE PANEL
1002
3
28" + 32" PW6515
29" PT5515
7942
7942
3964
7967
+3.3V-STBY
3003
1008
3002
+8V
+3.3V-STBY
+5V
+5V-STBY
VBATVBAT
+27V
0212
1
2
5
LINE DEFLECTION
A2
+8V
+3.3VSTBY
+33V
A4
+33V
+5V
+8V
+3.3V-STBY
A5
+8V
A6
+27V
+5V
EW
+
PANORAMA
SSP TUNER
+3.3V-STBY
+8V
+5V
SSP-SCART
3247
AUDIO
3736
3737
7703
TD1308T
5431
3
1225
9
6
TUNER
UV1300
7280
7273
7224
7702
AN5277
7
10
6
3448
3449
3446
3447
+13V_SCAVEM
3445
0226
40
38
36
+13V_VERT.
0241
+200V
C8
0226
C4
A3
+13V_VERT.
-13V
1
2
-13V-13V
0244
SSB-CONNECTOR
40
38
36
U-CONT.
3032
6020
7022
3054
7053
3044
C5
C6
C7
FRAME DEFLECTION
7501
TDA6172
CRT PANEL
B
1
1
+13V_
SCAVEM
+200V
7066
7064
3860
3840
+3.3V-STBY
+8V
+5V
MEMORY
7070
UPD431000A
AUDIO PROCESSING
7851
1163
AUDIO PROCESSING
7630
74HC4053
7650
74HC4053
7645
AC8478S
7513
SCAVEM
7830
TDA6107Q
5625
5602
0252
1
+3.3V-STBY
+3.3V-STBY
+8V SOUND
+8V SOUND
A7
0235
1
+5V
+5V
+8V
FRONT
ROTATION
+13V_VERT.
FRONT CONTROL
+3.3V-STBY
C3
+8VA
+5V
7012
3035
7016
7017
7014
0214
5
GND
6009
VS
VIDEO-FEATURES
1451
3
1465
1454
16
7066
3407
3406
3448
Small Signal Panel
C1
+3.3V-STBY
*
+8VA
+8V
C2
+8V
+8VA
+3.3V-STBY
+8V SOUND
-8V SOUND
7421
3425
4
IF &SYNC
3320
7321
3321
3340
7331
3331
VIDEO PROCESSING
3388
7368
3364
3332
3395
3385
3481
12
7408
4
5
3480
7308
-5V
6417
3485
3393 3339
3358
7444
33166301
6303
6305
R
6304
G
6308
B
+8V SOUND
CL 06532012_034.eps
14
23
53
54
30
33
32
31
44
3063
7
3
0238
7301
TDA8885
7301
1
3
FROM
B
SCAVEM
280200
Page 24
Blockdiagram, supply diagram and testpointsoverviews.
Blockdiagram
24A10E6.
C 4
A14
OENOT
WENOT
A7
COMM-LINE
A6
A5
A4
CENOT
A15
A13
A12
A3
A2
A1
A0
C 5
FOR 100 PAGES
TELETEXT
+3.3V-STBY
CONTROLS
SEL-SVHS-RR_STATUS2
STATUS_PIP-AFT_PIP-50-60HZ
7022
+3.3V-STBY
KEYBOARD
FRONT-DETECT
STAND-BY
+3.3V-STBY
SEL-MAIN-FRNT-RR
3029
LIGHT-SENSOR-VDEGAUSS
ON-OFF-LED
CVBS2OUT
G-SC1-IN-Y-IN
+3.3V-STBY
B-TXT-OSD
G-TXT-OSD
R-TXT-OSD
MEMORY
11
A
3090
1
3091
T
O
N
E
O
7064
TILT
1
2
4
5
6
8
9
10
13
14
15
16
17
18
22
SYS1
SYS2
9
A
2 3 4 5 6 7 8 9 10 11 12 13 14 16 16
10
A
23
24
25
26
27
28
29
31
32
33
36
37
38
39
40
45
46
47
48
49
+3.3V-STBY
T
8
13
A
T
O
N
E
C
15
O
A
A
N
E
W
90
8
7
6
5
IO
IO
IO
IO
7070
PANORAMA
100
SOUND-ENABLE
98
97
HIS-OFF
96
AGCuP
93
92
91
90
89
88
87
86
85
SDA-2
84
SCL-2
83
SDA
82
SCL
81
80
79
78
RC5
76
75
73
71
70
69
68
67
66
65
64
63
59
55
54
53
52
51
.
.C
N
4
IO
1057
SEL-IF-LL
SEL-MAIN-R1R2
7053-A
14
16
12
A
A
A
2
1
3
IO
IO
IO
+3.3V-STBY
2041
2042
+3.3V-STBY
3025
7
A
2122232425262728303132
0
A
FBL-SCAVEM
FBL-TXT-OSD
HFB
5
6
A
A
1
2
A
A
7301-A
1
2
7
8
9
C-FRONT-IN
C 1
15
14
SDA
SCL
VBF
+33V
IF
7412-A
3413
7412-B
3416
Sound
Traps
QSS Demod. +
AM Detection
+8VA
23
16
11
+8VA
I5
3326
3327
+8VA
3306
3302
CVBS-PIP_TUN1-2-CVBS-IN
7305
CVBS_TER_OUT
7307
SIF
+8VA
1333
7301-B
+
V2
+
54
V15
V13
V14
42
43
Y-MAIN
U-MAIN
V-MAIN
R-TXT-OSD
G-TXT-OSD
B-TXT-OSD
FBL-TXT-OSD
41,42
44,45
38,39
IF
S
DEMODULATOR
41
40
45
46
39
47
48
35
36
37
38
T
T
U
U
-O
-O
IN
IN
A
A
-M
-M
V
U
43
43
1
F ..
DW PANEL
19
18
7403
HISTOGRAM
986
867542
714
2
3
16
+8V
10
10
986
9
0226
23,28
21,29
20,25
C 6
436
4435
4434
4
Y-PIP+MAIN-IN
U-PIP+MAIN-IN
V-PIP+MAIN-IN
31
33
44
4432
44
-IN
D
U
-A
IP
P
AUDIO PROCESSING
_IN
T
N
O
_FR
LR
V17
V18
V16
T
U
-O
IN
A
-M
Y
1
0205
0205
200
0200
0
1
1
2
2
4
4
5
5
6
6
8
10
+5V
+8V
8
10
1
0201
01
02
1
2
4
5
6
7
8
9
3340
RGB/
YUV
INT
RGB/
YUV
MATRIX
YUV
INTER-
FACE
SAT.
CTRL
RGB
INPUT
L
C
S
I2C
INTERF
IDENT
D/A
7331
A
D
S
21
INPUT SWITCH
A 7
KEYBOARD
ON-OFF-LED
RC5
V1
COLOUR
DECOD-
ING
RGB/
YUV
MATRIX
I2C
BUS
CTRL
CAT.
CALIB.
RGB
OUTPUT
34
EHT-INFO
7651
DSP
FRONT
0226
2
4
3
+3.3V-STBY
V11
2924
26
71
44
Y-IN
21
C-IN
20
+5V
V12
V3
COMB-ON
49
51
1732
52
SCL
17
SDA
18
30
33
32
31
V6
V7V8
+8VSOUND
3067
7402
3063
4750
D/A
D/A
D/A
0215
2
0214
2
3
4
5
V9
8
342
14
16
5
V5
23
21
20
HEADPHONE-R
17
HEADPHONE-L
18
LR-SC1_AV_OUT
28,29
215
0
214
0
EHT-INFO
V10
12
7405
COMB
FILTER
6
9
R-CRT
G-CRT
B-CRT
CUTOFF
AUDIO-SW
AUDIO-L
AUDIO-R
2
TOP CONTROL
FRONT
2
INTERFACE
3
4
5
48
1
56
57
58
60
3
7
6
5
13
14
15,16
A 4
26
02
7277
V22
6
022
11
2
3
5
0238
FROM
A 2
A 6
A1
6
022
SSP-TUNER
6271
3271
2271
3272
6273
6274
6275
6276
7277
V20
2
44
024
02
2
3
5
8
023
3
3
024
1
2
AUDIO
STAND-BY
A2
SOUND_ENABLE
7703
67
2
IBEAM
3274
3273
3278
82
32
V21
CRT PANEL
B
7830
2
1
3
5
SCAVEM AMP
+13V
+200V
2
10
7710
3
7704
5
1
6266
8
9
7
7702
A5
POWER-DOWN
6278
2284
R
G
B
10
9
f f
V25
8
7701
A6
Y_CVBS_FRONT-IN
M-LINK INTERFACE
3456
0244
0224
3456
Y
CL
DA
S
TB
S
_S
5V
A 7
+
V23
V24
0165
FOCUS
+27V
A3
12
A4
7
HP_OUT_R
HP_OUT_L
LR_FRONT_IN
FRONT_DETECT
C-FRONT
SCAVEM COIL
SUBWOOFER
46
02
2
4
3
46
02
1
4
0240
11
10
6,8
7
4
2
ACTIVE
LEFT
RIGHT
0240
11
10
6,8
7
4
2
CRT
EHT
SIDE IO
PANEL
SSP-TUNER
A 4
+5V +33v
1225
69
11
4
SDA
IO8
IO7
IO6
IO5
IO4
IO3
IO2
IO1
+3.3V-STBY
7066
5
SDA
7
WC
NVM
6
SCL
3081
+3.3VSTBY
7063
3055
3083
A12
A8
A9
A10
A11
7053-B
3055
VFB
A16
4
A
17181920
3
A
SCL
6031
A 5
AV2
MONITOR OUT
51
0226
66
3534
L
A
C
D
S
S
SEL-IF-LL
SSP-CINCH
SVHS
C
Y
LL
RR
VIDEO
L
R
SEL-SVHS-RR_STATUS2
3242
AV1
Y
U
V
C 3
IF-TER
68
SEL-MAIN-R1R2
Y-CVBS-FRONT-IN
T
U
_O
S_TER
B
V
C
70
C-SC2_SVHS-IN
3241
+5V
Y-CVBS-SC2_AV2-IN
CVBS-SC1_AV1-IN
LR-SC1_AV1-IN
LR-SC2_AV2-IN
CVBS-SC2_MON-OUT
G-SC1-IN_Y-IN
B-SC1-IN_U-IN
R-SC1-IN_V-IN
LR-SC1_AV-OUT
VIDEO_FEATURES
1451
1454
1455
7413//7414
-IN
S
B
V
2
S
TU
1-2-C
TA
R
2-IN
E
V
_S
1-IN
N
-IN
V
R
S
2_A
-R
H
C
_TU
1_A
S
V
-S
IP
C
H
S
V
-P
-S
B
2_S
S
S
V
C
L-S
B
B
-C
-S
E
V
V
Y
S
C
C
C
7
8
7
8
VSIF1
7
VSIF2
8
7401-C
5
2
9
C-FRONT-IN
SEL-MAIN-FRNT-RR
T
U
-O
N
O
-IN
-IN
V-IN
2_M
_Y
_
_U
C
-S
1-IN
1-IN
1-IN
S
C
C
C
B
-S
-S
V
-S
R
B
G
C
0226
STAT_PIP-AFT_PIP-50-60HZ
I4
VIF1
VIF2
AGC
7401-B
2
4
1
10
7401-A
12
13
11
7368
3365
Y-CVBS-FRONT-IN
CVBS-SC1_AV1-IN
C-SC2_SVHS-IN
Y-CVBS-SC2_AV2-IN
CVBS-PIP_TUNER1-2-CVBS-IN
CVBS_TER_OUT
7280
+8V
3280
B
C
F
S
H
CL 06532012_018.eps
040200
Page 25
Blockdiagram, supply diagram and testpointsoverviews.
Blockdiagram
25A10E6.
SYNC
C 1
FRAME DEFLECTION
A 3
3501
3501
3528
F1
F2
+8V
7301-C
G
50/60Hz
FRAMEDRIVE-
FRAMEDRIVE+
7501
7
1
3525~ 3527
LINE DEFLECTION
A 3
DYN-PHASE-COR
0226
47
53
58
7513
3513
S1
S4
+13-VERT
VFB
55
50
45
G
56
15625
62
TV
6463
S2
5352
0226
6505
6
2
TV
3
S3
35112506
F4
3
5
LINEDRIVE1
3401
L1
49
1
SC
EW-DRIVE
PROTN
0222
5406
L2
7481
L7
3470
F3
VERT. DEFL COIL
-13V
4
3
L3
7481
HFB
5474//5475//5476
7470
3478
3474//3475
6414
3411
3412
6474
7478
2414/16
FOR WIDESCREEN ONLY
PANORAMA
2474
3480
3479
6480
7480
6482/83
2475
+13-VERT
PROT-UP
L4
L6
7482/61
5478//5479
0221
0221
2468
6485//
7466
1
4
41
DAF PANEL
(34" RF)
EHT
0221
1
2
2419
IL
EL
O
EFL C
. D
R
R DAF PAN
O
O
H
5417
VBAT
5430
1
10
3
1
4
3445
9
12
11
8
3446
7
3447
3448
6
3449
5
TO LOT (DYNAMIC FOCUS)
0258
FOCUS
VG2
6445
6446/6447
6448
L10
3487
HOR. DEFL COIL
3435
3436
3437
6461
2445
FF
2447
2450
3438
L9
L8
2462
6439
+200V
+13-VERT
9441/2
+13V_SCAVEM
+13V_SCAVEM
6440
-13V
7440
PROT-UP
DYN-PHASE-COR1
IBEAM
PROTN
+8V
7464
6464
7467
PROTN
220VAC
FRONT INTERFACE
0133
DEGAUSSING
COIL
POWER SUPPLY
A 1
-
3914
6915
P1
+
P3
2915
7921
4
START
3
P2
&
1
-
+
OSC
5
2
3923
0212
1
2
0212
0211
1
1900
2
3911
2
1
7932
5902
+13V
1931
LIGHT-SENSOR-VDEGAUSS
6929
6928
6926
7929
3
4
2
1
6938
5912
17
6
16
5
15
4
13
3
12
8
14
9
10
11
6972
1941
1961
2940
2974
6944
6961
+27V
6941
2962
2943
2942
3964
6986
7967
5
2
5
2
7965
1
7968
1
7987
POWER-DOWN
3989
P6
+3.3V-STBY
6966
P7
3
4
3
4
3969
2969
BURST
MODE
GEN
7971
2
3
7942
3
1
3947
7946
P4
1
P5
2
7944
STAND-BY
+140V
VBAT
+8V
+5V
+13-VERT
+5V-STBY
CL 06532012_019.eps
180200
Page 26
Blockdiagram, supply diagram and testpointsoverviews.
CL 06532012_037.eps
220200
3836
3832
3834
V25
V23
V24
19
2
V22V20
V21
8
VIDEO PROCESSING
C2
SCL
SDA
SCL
SDA
7301
TDA 8885
17
18
SCL
SDA
TUNER
1225
UV1300
4
5
U-CONTROL
C4
SCL
SDA
SDA
SCL
SDA-2
SCL-2
7066
M24C32
7064
SAA5667/
5565
6
5
78
48
82
81
84
83
AUDIO PROCESSING
C6
7651
MSP3451G
1
2
SCL
SDA
SSB-CONNECTOR
C8
SDA-2
SCL-2
SCL
SDA
SSP-TUNER
A4
0226
46
47
SDA-2
SCL-2
48
49
I2C BUS
I2C BUS-2
0226
46
47
48
49
CL 06532012_033.eps
220200
3329
3330
3085
3017
3018
3019
3601
3602
3084
3086
3268
3267
26A10E6.
Testpointoverview LSP (comp.side)
7965
EB
C
P6
2715
A5
A6
2718
P4
2
7942
Testpointoverview CRT (comp.side)
P2
7921
4
15
P3
5912
3971
2489
L6
P5
SW RS
OUT
L5
P7
L4
GKA
6485
3916
P1
6448
6446
L9
L10
7470
GS
D
L8
6445
L7
L3
7410
C
BE
7481
EB
C
L2
F2
F4
F3
F1
L1
3401
1357
7501
IC overview
Testpointoverview SSB (comp.side)
C
7370-C
S1
BE
I1V8
068
1327
V3
S4
62
63
S2
64
S3
116
I4
7403
2
V13
V14
7301
24412434
I5
V7
58 57 5653 52 5141
V6
3348
2426
V15
2311
V12
V7
32
31
V8
26
V2
3301
V6
S3
S2
I6
V9
V11
S4
161
3340
14712
A1
A2A4A3
115 4
I1I3
I2
CL 06532012_039.eps
220200
0205
134
V17V18
V16
V10
V4
2665
A8
2613
A12
2612
2611
2610
A9
A11
A10
CL 06532012_038.eps
220200
Page 27
Blockdiagram, supply diagram and testpointsoverviews.
Wiringdiagram
A10 - Wire Diagram ( Basic Configuration )
Top Control Panel
27A10E6.
Direct mount cable from Sub-Woofer
to LSP
[ All Set with subwoofer except
those listed in Appendix ]
Direct mount from Subwoofer to Side I/O Panel &
from Side I/O to LSP
[ Only for Set listed in Appendix ]
Top control 52870 (component side)Top control 52870 (copper side)
CL 06532012_031.eps
040200
C
CL 06532012_032.eps
CL06532012_064.eps
100300
040200
Page 52
Schematics and PWB’s
52A10E7.
Front interface
0132 A3
0211 A2
0212 B4
A
AC MAINS
INPUT
110V/220V AC
FRONT INTERFACE PANEL
0214 C1
0218 C1
1000 D2
1002 B4
1008 D2
2001 C3
2002 C3
3001 D2
3002 D3
123
3003 C2
3004 C3
3008 B3
0211
3009 A2
9001 A3
9002 B3
4
0132
T4.0AE
9001
2
1
3009
2M2
2
4
89
9002
1
3
56
0212
TO 0212 OF
1
POWER SUPPLY
2
A
Front interface (component side)
CL 06532012_023.eps
040200
B
C
D
TO ITV/
MULTIMEDIA
TO 0214
OF
FRONT
CONTROL
1
0218
0214
3008
4M7
1002
GP1U28QP
2
VS
1
2
5
4
3
2
1
2
+3V3
3003
680R
1008
3004
220R
2001
100u
3
2002
100n
1
OUT
3
GND
CL06532012_066.eps
130300
4
B
C
D
Page 53
Alignments
8.Alignments
General: The Service Default Mode (SDM) and Service
Alignment Mode (SAM) are described in chapter 5.
8.1Alignment conditions
All electrical adjustments should be performed under the
following conditions:
•Supply voltage: 220-240V +/- 10%
•Warm-up time: 10 minutes
•The voltages and oscillograms are measured in relation to
the tuner earth.
•Test probe: Ri > 10MΩ Ci < 2.5 pF.
8.2Electrical alignments
8.2.1VG2
Rough alignment
Using a pattern generator displaying a circle pattern, adjust the
VG2 potmeter of LOT L5630 to obtain normal picture.
Fine adjustment
1. Activate the SAM-menu. Go to the sub-menu “ WHITE
TONE” and select the subsubmenu NORMAL.
– Adjust the value of RED, GREEN and BLUE to 40
– Adjust the value of RED, GREEN and BLUE to 42 for
29” RF.
2. Temporarely leave the SAM-menu and go to the normal
user menu. Select sub-menu CONTRAST and set it to 0.
3. Switch OFF the normal user menu and return to the SAMmenu. Disable black current loop by changing the AKB bit.
Connect RF output of the pattern generator to antenna. Test
pattern: blank pattern (blank screen on CRT). Set the time base
of the oscilloscope to 0.5ms with external triggering of the
vertical pulse. Measure the black level pulse during the vertical
flyback at the RGB cathodes of the CRT.
GB 53A10E8.
max.
160V
0V Ref.
86532031_007.AI
Figure 8-1 Black level pulse
Adjust the highest of the three guns with the VG2 pot meter of
the LOT to 160Vdc for 24”, 25” and
28” BLD WS” set, while the min. black level voltage 165Vdc is
for 28” BLSW, 28” RFW, 29” RF and 32” BLSW picture tubes.
8.2.2Focus
Set the “SMART” picture setting to “natural”.
Using a pattern generator displaying a crosshatch pattern,
adjust the focus potmeter of LOT L5431 in such a way that the
haze on the vertical lines at 2/3 from the left and right edges of
the screen (just) disappears.
210100
Page 54
GB 54A10E8.
Alignments
8.3Software alignments (Service Alignment
Mode)
With the software alignments of the Service Alignment Mode
the geometry, white tone and tuner (IF) can be aligned.
CLEAR ERRORS
OPTIONS
AKB OFF
VSD OFF
TUNER
WHITE TONE
GEOMETRY
SOUND
SMART SETTING
5
MENU
STORE
234
SAM
SAM
MENU
MENU
MENU
NPRG
WSSB
SYSTEM
OB1
OB2
TUNER
IF-PLL OFFSET
AFC WINDOW
AGC
AFA
AFB
MENU
NORMAL RED
VER-AMPL
SAM
SAM
KHZ(100/250)
SAM
SAM
MENU
MENU
SOUND
NIC-FMAM
PS-FM
PS-NIC-BGDK
PS-NIC-I
RICH
RICH BGT
RICH COL
RICH CON
RICH SHP
RICH HUE
Figure 8-2 Service Alignments Mode screens and structure
SAM
SAM
CL 06532012_009.eps
180200
Page 55
Alignments
GB 55A10E8.
8.3.1Tuner
AGC
Set pattern generator (e.g. PM5418) with colour bar pattern
and connect to aerial input with RF signal amplitude - 10mV
and set frequency for PAL/SECAM to 475.25 MHz. For France
select the L’-signal.
– Activate the SAM-menu. Go to the sub-menu “ TUNER”,
select the sub-menu option AFC WINDOW and adjust the
value to 100kHz.
– Select the AGC sub-menu
– Connect a DC multi-meter to pin 1 of the tuner IC 1225.
– Adjust the AGC until the voltage at pin 1 of the tuner is 1.0V
+/- 0.1V.
– The value can be incremented or decremented by pressing
the right/left MENU-button on the RC.
– Switch the set to standby.
Tuner options - IF PLL OFFSET and AFC WINDOW
NO ADJUSTMENTS NEEDED FOR THESE ALIGNMENTS
The default values for these options are:
– IF PLL OFFSET :
– AFC WINDOW :
8.3.2White tone
In the white tone sub menu the colour values for the colour
temperature values can be changed.
The colour temperature mode (NORMAL, DELTA COOL,
DELTA WARM) or the colour (R, G, B) can be selected with the
RIGHT/LEFT cursor keys. The mode or value can be changed
with the UP/DOWN cursor keys.
First the values for the NORMAL colour temperature should be
selected. Then the offset values for the DELTA COOL and
DELTA WARM mode can be selected. Note that the alignment
values are non-linear
0 represent the middle value (no offset difference)
+1 to +63 represent a positive offset (63 is the maximum
positive offset)
-63 to -1 represent a negative offset ( -63 is the minimum
negative offset)
Negative <<< -63, -62,..., -1, 0, 1,..., 62, 63 >>> Positive (0 = no
offset)
8.3.3Geometry
– Adjust Horizontal shiftHOR-SHIFT xx
– Adjust Horizontal widthEW-WIDTH xx
– Adjust ParabolaEW-PARA xx
– Adjust Up cornerEW-UCORN xx
– Adjust low cornerEW-LCORN xx
– Adjust TrapeziumEW-TRAP xx
– Adjust Horizontal parrallogramEW-PARA xx
– Adjust Horizontal bowHOR-BOW xx
SERV.BLK: switch on/off the blanking of the lower half of the
screen (To be used in combination with the vertical slope
alignment)
VER-SLOPE; Align the vertical centre of the picture to the
vertical centre of the CRT. (This is the first alignment to be
performed of the vertical alignments)
VER-AMPL; align the picture height (other vertical alignments
are NOT compensated)
VERSHIFT; align the vertical centre of the picture to the
vertical centre of the CRT
HORSHIFT; align the horizontal centre of the picture to the
horizontal centre of the CRT
EW-WIDTH; align the picture width (*)
EW PARA; align straight vertical lines at the sides of the
screen (*)
EW-UCORN; align straight vertical lines in the upper corners of
the screen (*)
EW-LCORN; align straight vertical lines in the lower corners of
the screen (*)
EW TRAP; align straight vertical lines in the middle of the
screen (*)
EW-PARA; align straight vertical lines in the top and in the
bottom; vertical rotation around the centre (*)
HOR-BOW; align straight horizontal lines in the top and the
bottom; horizontal rotation around the centre
Alignments indicated with (*) are not applicable for sets without
East/West circuitry
8.3.4Sound
NO ADJUSTMENTS NEEDED FOR SOUND
The default values for the audio alignments are:
– NIC-FMAM : 250 NICAM error rate threshold, the higher
the more tolerance
– PS-FM: 38 Prescale for FM
– NIC BG/DK: 82 Prescale for NICAM in BG/DK system
– NIC I: 127 Prescale for NICAM in I system
– NIC L: 82 Prescale for NICAM in L system
The geometry alignments menu contains 13 items to align a
correct picture geometry. In widescreen sets, the GEOMETRY
SW is available for separate alignments of the superwide
(panorama) mode. The geometry alignments are:
Initial set-up:
– Activate the SAM-menu. Go to the sub-menu “SMART
SETTING” and change the setting to NATURAL.
– Exit the sub-menu “SMART SETTING” and go to sub-
menu “ GEOMETRY”.
•Adjust VER-SCOR to 8 for 28” WS-sets
•Adjust VER-SCOR to 13 for 25”, 28”, 29” 32” and 34”
picture tubes.
•Adjust VER-SCOR to 23 for 29” SF- sets
– Vertical zoom is fixed at a default value of 25
– Vertical scroll is fixed at a default value of 32
VER-SCOR; align the vertical linearity, meaning that vertical
intervals of a grid-pattern must be equal over the entire height.
Extra Alignment for 4:3 sets and Widescreen sets ( Widescreen
mode )
– Set Service blanking on SERV-BLK ON
– Adjust Vertical slopeVER-SLOPE xx
– Set Service blanking OFFSERV-BLKOFF
General Alignment (4:3 set, Widescreen and Superwide mode)
– Adjust Vertical amplitudeVER-AMPL xx
– Adjust Vertical shirtVER-SHIFT xx
8.4Options
8.4.1Options
Options are used to control the presence / absence of certain
features and hardware. There are two ways to change the
option settings, see Figure 2 : Service Alignments Mode
screens and structure.
1. Changing a single option
An option can be selected with the MENU UP/DOWN keys
and its setting can be changed with the MENU LEFT/
RIGHT keys
2. Changing multiple options by changing option byte values
Option bytes make it possible to set very fast all options. An
option byte represents a number of different options. All
options of the A10 are controlled via 7 option bytes. Select
the option byte (OB1, OB2, OB3, OB4, OB5, OB6 or OB7)
and key in the new value.
3. Changes in the options and option bytes settings are saved
by selecting STORE and pressing the MENU RIGHT key.
All changes are disregarded when the OPTION submenu
is left without using the STORE command. Some changes
will only take affect after the set has been switched OFF
and ON with the mains switch (cold start).
Page 56
GB 56A10E8.
8.4.2List of options
Unless otherwise stated Y(es) means present (or ON), N(o)
means not present (or OFF).
Alignments
FeaturesAbbreviations
(A10)
Auto Standby with no pictureSBNPOFF = Disabled, no automatic switch to standby
Side AV SourceAV3OFF = Disabled, side AV source not avaliable
Picture Setting for compress 16:9C169OFF=Disabled, 16:9 COMPRESS setting is not available in FORMAT menu
Picture Setting for expand 14:9E149OFF= Disabled, 14:9 EXPAND setting is not available in FORMAT menu
Wide screenWSCROFF= Disabled, WIDESCREEN is replaced by FORMAT
Hospitality modeHOSPOFF = Disabled, hospital mode cannot be entered
Smart clock/AutochronSMCKOFF= Disabled, menu item smart clock function not available
Comb filterCBFLOFF= Disabled, no comb filter on the SSB
Incredible pictureIPIXOFF= Disabled, INCR. PICT is replaced by CONSTRAST+
Incredible picture via menuIPMUOFF = Disabled, menu item INCR. PICT not available
Dynamic Noise Reduction/Noise ReductionDNRMOFF=Disabled, menu item NOISE REDUCTION not available
Virtual dolbyVDBYOFF = Disabled, menu item DOLBY VIRTUAL not available
NTSC playback hardware configurationNTSCOFF= Disabled, NTSC playback not possible
System (*)SYSTEMEW - Select West Europe's colour and sound system
Favorite pageFAPGOFF = Disabled favourite page in Teletext mode
Philips tunerPITNOFF = Disabled, ALPS compatible tuner is used
An option byte value is calculated in the following way:
value “option bit 1” x 1 =
value “option bit 2” x 2 =
value “option bit 3” x 4 =
value “option bit 4” x 8 =
value “option bit 5” x 16 =
value “option bit 6” x 32 =
value “option bit 7” x 64 =
value “option bit 8” x 128 =
Total : value “option byte” =
Page 58
GB 58A10E9.
Circuit descriptions and abbreviation list
9.Circuit descriptions and abbreviation list
9.1Circuit descriptions
The following circuits are described:
1. Introduction
2. Block diagram
3. Power supply (see A8 TM: 4822 727 21613)
4. Control
5. Tuner & IF
6. Video processing
7. Synchronisation
8. Horizontal deflection (see A8 TM: 4822 727 21613)
9. Vertical deflection (see A8 TM: 4822 727 21613)
10. Audio processing
11. OSD / Teletext / NexTView
12. CRT / SCAVEM / Rotation
9.1.1Introduction
The A10E is the successor of the A8-chassis. A10 is the
chassis name, E stands for Europe.
Where the A8 used a lot of different panels, the A10
architecture consist of 1 conventional large signal panel (LSP)
9.1.2Block diagram
and a small signal board (SSB) module, placed into a so called
SIMM-connector (Standard Interface, 80 pins):
•The LSP is built up very conventional, with hardly any
surface mounted components on the copper side. It
incorporates the Power Supply, the Deflection, the Tuner,
the I/O and the Audio Amplifier circuits.
•The SSB is a high tech module (2 sides reflow technology,
full SMC) with very high component density. Despite this, it
is designed in such a way, that repair on component level
will be possible. To achieve this extensive diagnostic
possibilities are provided via Service Modes and/or
ComPair. The SSB incorporates the IF-, Video/Audioprocessing, Control and OSD/TXT circuits.
Due to the low amount of cabling etc., expectation is that the
FCR will be low.
In this 'circuit description' chapter, sometimes will be referred to
the Training Manual of the A8 (4822 727 21613). This is done
for the following circuits: the Power supply, the Horizontal
(Line) Deflection and the Vertical (Frame) deflection parts. The
electrical principle of these circuits is also applicable on the
A10.
TUNER
EXT
I/O
TOP
CONTROL
KEYBRD
IR
RECEIVER
SUPPLY
EHT
200V
V
BAT
+8V
+5V
+13V
-13V
V
SOUND
FILTER
(+140V)
(+27V)
IF
VSIF
PAINTER
VSIF
SIFL/R
R/L
RGB-TXT-OSD
MSP
FRAMEVIF
LINEVIDEO
E/W
HFB VFB
HP
SW
VERTBOCMA
HOR
E/W
NVM
FLASH
+27V
CRT
+
SCAVEM
R
G
B
L/R
HP
ACTIVE
SUBWOOFER
Figure 9-1
CL 06532012_011.eps
180200
Page 59
Circuit descriptions and abbreviation list
GB 59A10E9.
The tuner type UV1316 is a PLL tuner and delivers the IFsignal, via audio & video SAW-filters, to the Multi-system TV
processor (TDA888x, IC7301 also called BOCMA), which has
the following functions:
•Multi-system decoder.
•Video source- and record select.
•Colour decoder.
•RGB output.
•Sound demodulator.
•Geometry control.
•Picture improvement.
•Synchronisation.
The BOCMA has 1 input for the internal CVBS signal and 2
inputs for external CVBS or Y signals. It has only one Chroma
input so that it is not possible to apply 2 separate Y/C inputs.
The selection is made via the I
It has 2 independently switchable CVBS outputs for e.g. TXT,
Comb-filter, CVBS-monitor or PIP (optional).
Two SCART-connectors are used: SCART1 is fully equipped
and SCART2 is meant for VCR. Pin 10 of SCART2 is used for
Easylink and there is a possibility for Y/C in. The CVBS-out on
pin 19 can be used for WYSIWYR (What You See Is What You
Record).
Internal video processing is done in the BOCMA with YUVsignals. It also handles the video control, geometry part and the
insertion of the TXT/OSD RGB-signals. The video part delivers
the RGB signals to the CRT-panel and the geometry part
delivers the H-drive, V-drive (differential output), E/W-drive.
Both deflection circuits are located on the LSP and are driven
by the BOCMA. The horizontal output stage generates also
some supply voltages and the EHT-, focus- and Vg2-voltages.
The RGB amplifiers on the CRT-panel are integrated in one IC
(TDA6107Q) and are supplied with 200 V from the LOT. The
SCAVEM circuit modulates transitions of the Luminance (Y)
signal on the horizontal deflection current, giving a sharper
picture.
The sound part is built up around the MSP34xx (Multi-channel
Sound Processor) for IF sound detection, sound control and
source selection. Dolby decoding is also done by the MSP.
Amplification is done via an integrated power amplifier IC, the
AN5277.
The microprocessor, called Painter (SAA55XX, IC7064), takes
care of the set control, error generation and analogue TXT/
OSD input- and output processing.
The Painter, ROM and RAM are supplied with 3.3 V, which is
also present during STANDBY.
The NVM (Non Volatile Memory) is used to store the settings,
the flash-RAM contains the set software and the DRAM
(located inside the µP) is capable for storing 10 Teletext pages.
The power supply is a Switch Mode Power Supply (SMPS) with
minimum voltage switch. It is a flyback converter with primary
current sensing, secondary voltage sensing and mains input
measuring. It is built around IC7921 (which has a built-in
MOSFET and control circuit) and generates a.o. the 140 V (VBAT) and the 27 V (for the audio part).
During Standby, the power supply is switched to a 'low power
burst mode' via TS7946 and the following burst mode
generator, in order to reduce the power consumption.
A relay is used to switch the degaussing circuit for several
seconds during switching 'ON' of the set.
9.1.3Power supply (diagram A1)
For circuit description see A8 Training Manual: 4822 727
21613.
2
C-bus.
Differences with the A8 are:
•Item-numbers are different from the one mentioned in the
text.
•Degaussing cicrcuit
•Output voltages
Degaussing circuit (diagram A1: section A1 - D3)
The degaussing circuit is activated whenever the TV set is
turned on. So from normal 'off' to 'on' and from 'stand-by' to 'on'
the degaussing circuit is activated. During start-up the signal
LIGHT_SENSOR_VDEGAUS (A4-1) is low. After start-up of
the µP this becomes high for 2 seconds which forces TS7932
in conduction. Now the coil of the relay is activated and switch
1931 is closed. The mains voltage is now connected to the
degaussing coil. The degaussing current passes through the
degaussing coil and through PTC 3911 and PTC 3912 which
limit the inrush-current.
After these 2 seconds, the signal
LIGHT_SENSOR_VDEGAUS goes low, 7900 turns off, the
coil of relay 1931 is de-energised and the 220 Vac is
disconnected from the degaussing coil. During normal
operation, no current passes through the degaussing coil due
to the fact that switch 1931 is opened.
Output voltages
•+8V_UNREG (Input voltage for stabiliser 7942 and supply
voltage for the circuit to activate the degausssing coil) :
+13.5 V. If +14 V and +8 V are not present check 1905.
•+33V (For Tuner at Mono-carrier and PIP-panel) : +33 V.
Created via R3409 and zenerdiode 6481
•Vbat (Battery Voltage for Line Output Stage) : +140 V
•+8V (BOCMA Supply, Scart, Video at SSB) : +8.3 V.
Output voltage from stabiliser 7942. This voltage is
decreased in standby to 2.3 V. In standby TS7944 is
conducting and switching R3945 parallel to R3942 and
R3947.
•+5V_STBY : +5.1 V. This voltage is also present during
standby. If this voltage and +5V are missing check Fuse
1961. If the voltage at pin 2 and 5 of IC7968 are present
replace 7907.
•+5V (For Tuner, NV_CLOCK, Video at SSB, PIP-panel):
+5.1 V. This voltage is disabled when the +13V-VERT is
not present at pin 2 of IC7967. +13V -VERT is generated
by the line-output circuit. So when the line-output circuit is
working correctly the +5V is enabled to start the set.
•+27V (Audio Supply) : +27 V. If this voltage is missing
check D6971/6972 and/or sound-amplifier IC7702.
•3V3_STBY (µP Supply, NVM, BOCMA supply, Receiver
LED): This voltage is also present during standby. If this
voltage is missing check NFR 3964.
9.1.4Control (diagram C4)
Micro-processor
The microprocessor (SAA55XX, IC7064 called Painter)
provides:
•Control functions for the TV-set.
•On Screen Display (OSD).
•Teletext functions.
•P50 (Easylink) communication.
•I/O-ports for I
•Error code generation.
For 10 pages TXT-data can be stored internally.
The Non Volatile Memory IC7066 is a 4 kB version
M24C32W6.
All ICs in this part are supplied with 3V3 that is also present
during Standby. For this voltage a zenerdiode is used (D6966).
For stable OSD and TXT, the display is synchronised to the TV
signal processing device by way of horizontal and vertical sync
2
C, RC5, LED, and service modes.
Page 60
GB 60A10E9.
Circuit descriptions and abbreviation list
signals provided by external circuits (HFB and VFB). From
these signals all display timings are derived.
The OSD/TXT RGB-outputs (46/47/48) and fastblanking (52)
are fed to the BOCMA (pins 35 - 38).
Pin SignalFunction
1TILTGenerates drive signal for rota-
tion circuit
2SEL_SVHS_RR_ST
ATUS2
Selects Y/C source from Side or
Rear I/O and detects presence of
EXT2 (CVBS) / 4:3 or 16:9
4STATUS1_PIP-
AFT_PIP-50-60HZ
Detects presence of EXT1
(CVBS) / 4:3 or 16:9
5KEYBOARDInput line from Top Control key-
board
6FRONT_DETECTDetects presence of Headphone
at FRONT
13 STAND-BYTo switch between Standby and
Normal operation
16 SEL_MAIN_FRNT_RRSelects main video source from
Rear or Front
17 COMM_LINEP50 in/output (Easylink)
18 LIGHT-
SENSOR_VDEGAU
Activates the degaussing relay at
switch on
SS
24 SYS1Selects Combfilter
25 SYS2Selects Combfilter
28 ON_OFF_LEDLED driver output
31 CVBS2OUTCVBS input for TXT data
32 G_SC1-IN_Y-IN
46 B_TXT_OSDBlue output for OSD/TXT
47 G_TXT_OSDGreen output for OSD/TXT
48 R_TXT_OSDRed output for OSD/TXT
52 FBL_TXT_OSDFast blanking output for TXT and
OSD
52 FBL_SCAVEMFast blanking output for SCAVEM
53 HFBH-sync input for stable OSD/TXT
54 SEL_MAIN_R1R2Selects main video source from
EXT1 or EXT2
55 VFBV-sync input for stable OSD/TXT
59 SEL_IF_LLSwitches the appropriate SAW fil-
ter for LL'
70 CLOCK12MHZClock output for external IC's
76 RC5Input line from Remote Control
2
81 SCLClock output of master I
82 SDAData in/out of master I
83 SCL_2Clock output of NVM I
84 SDA_2Data in/out of NVM I
2
2
2
C bus
C bus
C bus
C bus
93 AGCuP
96 HIS_OFFTo activate the optional Histo-
gram IC TDA9171
98 SOUND_ENABLEMutes the audio amplifier
100 PANORAMAActivates 16:9 feature
2222
C-busses
I
In the A10E-chassis with Painter-processor there are two I
busses used:
•Hardware I
2
C-bus, used for all IC communication.
2
C-
•Separate short bus for the Non Volatile Memory (NVM), to
avoid data corruption.
NVM
The Non Volatile Memory IC7066 contains all set related data
that must be kept permanently, such as:
•Software identification.
•Operational hours.
•Error-codes.
•Option codes.
•All factory alignments.
•Last Status items for the customer + a complete factory
recall.
9.1.5Tuner & IF (diagram A4, C1 & C3)
Tuner
The tuner UV1316 is I
2
C-controlled and is capable of receiving
off-air, S- (cable) and Hyperband channels:
•Low44.25 - 157.25 MHz
•Mid157.25 - 442.5 MHz
•High142.5 - 890.0 MHz
Tuning is done via I
2
C. The reference voltage on pin 9 is 33 V.
This voltage is derived from the V-BAT via a resistor of 68 kΩ
and a zenerdiode.
Video IF amplifier
The IF-filter is integrated in a SAW (Surface Acoustic Wave)
filter. One for filtering IF-video (1451 or 1454 in case of system
L/L') and one for IF-audio (1455). The type of these filters is
depending of the standard(s) that has to be received.
The output of the tuner is controlled via an IF-amplifier with
AGC-control. This is a voltage feedback from pin 7 of the
BOCMA to pin 1 of the tuner. The AGC-detector operates on
top sync and top white level. AGC take-over point is adjusted
via the service alignment mode ’Tuner' - 'AGC’. If there is too
much noise in the picture, then it could be that the AGC setting
is wrong. The AGC-setting could also be mis-aligned if the
picture deforms with perfect signal; the IF-amplifier amplifies
too much.
An (alignment free) PLL carrier regenerator with an internal
VCO demodulates the video signal. This VCO is calibrated by
means of a digital control circuit, which uses the clock
frequency of the µP as a reference. The frequency setting for
the various standards (33.4, 33.9, 38.0, 38.9, 45.75 and 58.75
MHz) is realised via the I
2
C-bus.
The AFC output is generated by the digital control circuit of the
IF-PLL demodulator and can be read via the I
The video identification circuit is used to identify the selected
CBVS or Y/C signal.
The IC contains a group delay correction circuit, which can be
switched between the BG and a flat group delay response
characteristic. This has the advantage that in multi-standard
receivers no compromise has to be made for the choice of the
SAW filter. Also the sound trap is integrated. The centre
frequency of the trap can be switched via the I
signal is available on pin 27.
QSS sound circuit
The single reference QSS mixer is realised by a multiplier. In
this multiplier the SIF signal is converted to the intercarrier
frequency by mixing it with the regenerated picture carrier from
the VCO. The mixer output signal is supplied to the output via
a high-pass filter for attenuation of the residual video signals.
With this system a high performance hi-fi stereo sound
processing can be achieved.
The AM sound demodulator is realised by a multiplier. The
modulated sound IF signal is multiplied in phase with the
limited SIF signal. The demodulator output signal is supplied to
the output via a low-pass filter for attenuation of the carrier
harmonics. The AM signal is supplied to the output (pin 27) via
the volume control.
2
C-bus.
2
C-bus. The
Page 61
Circuit descriptions and abbreviation list
9.1.6Video processing (diagram C2 & C3)
GB 61A10E9.
R-CRT
G-CRT
B-CRT
EHT-INF
33
35
31
34
18
SDA
17
SCL
IIC BUS
CONTROL
13
HALFT
50
SWO2
22
SWO1
Y
SW OUT
LUM-
RGB
MATRIX
CD
CD
MATRIX
MATRIX
U
RGB-2
Y
DELAY
PEAKING
RGB
R
G
BLACK
WHITE/
CONTROL
CONTROL
SATURATION
SATURATION
V
INPUT
RGB/YUV
CORING
OUTPUT
B
+
RGB1
STRETCH
MATRIX
V
U
LINE
BASE
BAND
DELAY
U
V
SECAM
PAL/NTSC
DEMODULATOR
PASS
BAND
+TRAP
CHROMA
+
INPUT
CATHODE
CALIBRAT.
TINT
30
BLKINCUTOFF
38
BLI1
BI1
GI1
35 36 37
RI1
19
WHSTR
48
V1R1
U1B1
VO(Y1)GI
45 46 47
UO1BL3
44
BLI2
BI2
GI2
41 42 43
RI2
40
YOUT
39
YIN
FSCOUT
OSCOUT
51 52 49
OSCIN
DSX840
1327 1281
TDA9171
2328
2327
(OPT.)
HISTO
COMB-ON
22P22P
7403
R-SC1-V-IN
B-SC1-U-IN
G-SC1-Y-IN
FBL-SC1-IN
070200
CL 06532012_013.eps
1451
VSIF
SAW
1225
VIF
1455
TUNER
SAW
LSP
SC1
1
2
1,2 8,9
IF AMPL.
7301
TDA8885-B
27
16
SIF1
B-SC1-V-IN
G-SC1-Y-IN
R-SC1-U-IN
STATUS1_PIP-
AFT_PIP-50-60Hz
CVBS1OUT
26
52
CVBS2OUT
CVBS_TER_OUTCVBS2OUT
7401
2151
7401
543
FBL-SC1-IN
CVBS-SC1-AV1-IN
CVBS
SWITCH
CVBSINT
CVBSY2
CVBSY3
24
SND
CVBS-SC2-MON-OUT
C3
29
21
20
TRAP
MAIN-CVBS-EXT-IN
1
SC2
2
STATUS2
SEL-SVHS-RR_
C-IN
Y-IN
COMB
TDA9181
7405
121413
C-SC2-SVHS-IN
VIDEO
INDENT
9
(OPT.)
AV2-IN
Y-CVBS-SC2-
R-TXT-OSD
G-TXT-OSD
B-TXT-OSD
FBL-TXT-OSD
484746
CVBS2OUT
SEL_MAIN_FRONT_RR
52
PAINTER
SEL_MAIN_RIR2
25516 31
SEL_SVHS_RR_STATUS2
7064
SIDE VO
YC
V
SVHS
53
HFB
55
VFB
2
4
Figure 9-2
Page 62
GB 62A10E9.
Circuit descriptions and abbreviation list
Introduction
The video processing is completely handled by a one-chip
video processor the TDA888X. This IC contains:
•IF demodulator.
•Chrominance decoder
•Sync separator.
•Horizontal & vertical drive.
•RGB processing.
•CVBS and SVHS source select.
It has also build in features like:
•CTI.
•Black stretch.
•Blue stretch.
•White stretch.
•Slow start up.
•Dynamic skin tone correction etc.
Further, and this is different with the used TDA884x in the A8,
it also incorporates sound IF traps and filters, and requires only
one crystal for all systems.
Source selection
The BOCMA has an input for the internal CVBS signal and 2
inputs for external CVBS or Y signals. The circuit has only 1
chroma input so that it is not possible to apply 2 separate Y/C
inputs.
The selection of the various sources is made via the I
2
C-bus.
The used IC version has 2 independently switchable outputs:
•The CVBS1 output (pin 54) is identical to the selected
signal that is supplied to the internal video processing
circuit and is used as source signal for the teletext decoder
(Painter). Both CVBS outputs have an amplitude of 2.0 VPP.
•The CVBS2 output (pin 26) is fed to pin 19 of SCART2 for
WYSIWYR (What You See Is What You Record).
If the Y/C-3 signal is selected for one of the outputs, the
luminance and chrominance signals are added so that a CVBS
signal is obtained again.
The I/O is divided over two parts: Rear I/O and Side I/O. The
rear has 2 SCART inputs, the side has only one SVHS input.
The I/O signals are routed via the LSP to the SSB panel.
EXT1: The input of SCART1 is CVBS + RGB + L/R and the
output is the video (+ sound) signal from the tuner
(CVBS_TER_OUT).
EXT2: The input of SCART2 is Y/C + CVBS + L/R. The output
signal is CVBS_SC2_MON_OUT (+ sound).
SCART2 is meant for VCR and has therefore some additional
signals in relation to EXT1 but no RGB: it has the possibility for
Y/C_in and Easylink-Plus (P50): Y_in on pin 20 and Chroma_in
on pin 15. Easylink is handled via pin 10 of the SCART2 (this is
a bi-directional communication with the µP) and supports the
next features:
•Signal quality and aspect ratio matching
•One touch play & text
•PIP
•Pre-set download
•WYSIWYR
•Automatic Standby
•Country and language installation
•System Standby
•Intelligent set top box features
•NexTView download
•Timer record control
•VCR control feature
The selection of the external I/O's is controlled by the µP (pins
16 & 55) and handled via IC7401:
•SEL-MAIN-R1R2 is the selection between SCART1 (R1)
and SCART2 (R2).
•SEL-FRNT-RR selection is made between Side and Rear
I/O.
The status signals (SCART pin 8) and also Front detection is
fed to the Painter (pins 2, 4 and 6).
Combfilter
After the selection of the external signals (EXT1, EXT2 or Side
I/O) is made, the Y/CVBS signal is fed to the TDA888X (pin 29)
along with the Front-end signal (pin 24). The selection between
the 2 is made in the BOCMA and the output (pin 26) is fed to
the (optional) Comb Filter, whose output is again fed to the
BOCMA (pin 21) for further processing. The external colour
signals are also fed to the Comb filter. In SVHS mode the Comb
filter is bypassed and the external signals are directly fed to the
BOCMA.
Switching the Comb filter is done via pen 49 of IC7301. Video
standard selection is done via the SYS1 and SYS2 signals from
the microprocessor.
If the Combfilter is not used then the jumpers (4472 diagram
C3) is present and the external Y/C signals are directly fed to
the pins 20, 21 of IC7301.
After this stage we add the external RGB signals (from SCART)
to pins 40 - 44.
Histogram (YUV picture improvement) IC
The demodulated video-signal can be checked on pins 40, 45
and 46 of IC7301 and is fed to pins 39, 47 and 48. In this path
the Histogram IC TDA9171 can be inserted. Without this IC, the
jumpers 4436 & 4433 (Y), 4434 & 4432 (U) and 4435 & 4431
(V) are used.
This TDA9178 can control various picture improvements:
histogram processing, colour transient improvement and
luminance transient improvement.
•Sets without TDA9178; for sets without TDA9178, the
Dynamic Skin Tone Control, Blue Stretch and Green
Enhancement are controlled by the BOCMA.
•Sets with TDA9178: for sets with TDA9178 the Dynamic
Skin Tone Control and Green Enhancement are controlled
in the TDA9178. The Blue Stretch is controlled by the
BOCMA and the Blue Stretch of the TDA9178 is switched
off.
When the TDA9178 is used, noise reduction is also available.
The action of the noise reduction has also influence on the
sharpness control: if a noisy signal is received then the noise
reduction should be high and sharpness low and also vice
versa.
Protections
Overvoltage conditions (X-ray protection) can be detected via
the EHT tracking pin (pin 3). When an overvoltage condition is
detected the horizontal output drive signal will be switched-off
via the slow stop procedure but it is also possible that the drive
is not switched-off and that just a protection indication is given
2
C-bus.
in the I
This pin can also be used to switch off the TV-receiver in a
correct way when it is switched off via the mains switch or when
the power supply is interrupted by pulling the mains plug. It is
possible to place the vertical deflection in an overscan position.
The IC has a second protection input on pin 58 used as 'flash'
protection. When this input is activated the horizontal drive
signal is switched-off immediately and switched-on again via
the slow start procedure.
Chroma and Luminance processing
The circuit contains a chroma bandpass and trap circuit
(including a luminance delay line and the delay for the peaking
circuit). The centre frequency of the chroma bandpass filter is
switchable via the I
2
C-bus so that the performance can be
optimised for ‘front-end’ signals and external CVBS signals.
Page 63
Circuit descriptions and abbreviation list
GB 63A10E9.
Colour decoder
The colour decoder can decode PAL, NTSC and SECAM
signals. The internal clock signals for the various colour
standards are generated by means of an internal VCO, which
uses the 12 MHz crystal frequency as a reference.
Under bad-signal conditions (e.g. VCR-playback), it may occur
that the colour killer is activated although the colour PLL is still
in lock. When this killing action is not wanted it is possible to
overrule it.
The IC contains an Automatic Colour Limiting (ACL) circuit
which is switchable via the I
2
C-bus and which prevents that
oversaturation occurs when signals with a high chroma-toburst ratio are received.
The reference frequency of the colour decoder is fed to the Fsc
output (pin 49) and can be used to tune an external comb filter.
The base-band delay line is integrated. The demodulated
colour difference signals are internally supplied to the delay
line. The colour difference matrix switches automatically
between PAL/SECAM and NTSC.
Picture improvement features
In the BOCMA various picture improvement features have
been integrated. These features are:
•Video dependent coring in the peaking circuit. The coring
can be activated only in the low-light parts of the screen.
This effectively reduces noise while having maximum
peaking in the bright parts of the picture.
•Colour Transient Improvement (CTI). This circuit improves
the rise and fall times of the colour difference signals.
•Black-stretch. This circuit corrects the black level for
incoming video signals, which have a deviation between
the black level and the blanking, level (back porch).
•Blue-stretch. This circuit is intended to shift colour near
‘white’ with sufficient contrast values towards more blue to
obtain a brighter impression of the picture
•White-stretch. This function adapts the transfer
characteristic of the luminance amplifier in a non-linear way
dependent on the picture content. The system operates
such that maximum stretching is obtained when signals
with a low video level are received. For bright pictures the
stretching is not active.
•Dynamic skin tone (flesh) control. This function is realised
in the YUV domain by detecting the colours near to the skin
tone. The correction angle can be controlled via the I
2
C-
bus.
RGB output
The IC's have a flexible control circuit for RGB and YUV input
signals which has the following features:
•Input which can be used for YUV or RGB input signals and
as YUV interface. The selection of the various modes can
be realised via the I
2
C-bus. For the YUV input 2 different
input signal conditions can be chosen It is also possible to
connect the synchronisation circuit to the incoming Y input
signal. This input signal can be controlled on saturation,
contrast and brightness.
•The RGB-1 input which is intended for OSD/text signals
and which can be controlled on contrast and brightness. By
means of software the insertion blanking can be switched
on or off. It is also possible to convert the incoming RGB-1
signal to a YUV signal. The resulting signal is supplied to
the YUV outputs.
•The TDA888X versions have an additional YUV or RGB
input which can be controlled on contrast, saturation and
brightness. This signal is supplied to the control circuit via
the YUV interface so that an external picture improvement
IC will also have effect on this signal.
Geometry control
The deflection processor of the TDA888X series offers several
control parameters for picture alignment:
•S-correction
•vertical amplitude
•vertical slope
•vertical shift
•vertical zoom
•vertical scroll
for vertical picture alignment, and
•horizontal shift.
•EW width with extended range because of the “zoom”
function
•EW parabola width
•EW upper/lower corner parabola
•EW trapezium correction.
•horizontal parallelogram and bow correction
for the horizontal picture alignment.
The IC is designed for use with a DC-coupled vertical deflection
stage. This is the reason why a vertical linearity alignment is not
necessary (and therefore not available).
All geometry control is done via I
2
C and the data is stored in the
NVM (IC7066) of the SSB.
Cut-off control / white drive
The picture tube is continuously adjusted to prevent visible
ageing of the picture tube. In this way the customer has always
a perfect picture. This is so-called ‘Continuous Cathode
Calibration’. The function is realised by means of 2-point black
level stabilisation. By inserting two levels for each gun and
comparing the result with 2 different reference circuits the drive
is controlled. With two different reference currents the influence
of picture tube parameters like the spread in cut-off voltage can
be eliminated.
The measurement of the 'high' and the 'low' current of the 2point stabilisation circuit is carried out in 2 consecutive fields.
The leakage current is measured in each field, The maximum
allowable leakage current is 100 A. The current is measured
via Black Current Input (BLKIN) that is fed back to pin 30 of
IC7301.
When the TV is switched-on the RGB output signals are
blanked and the black current loop will try to set the right picture
tube bias levels and then there is RGB-drive.
Peak White Limiting
If the beam current becomes too high, the picture tube could be
damaged. The control circuit contains a Peak White Limiting
circuit (pin 34): if the beam current increases, the EHT-info
voltage will decrease. Now the contrast will be reduced. The
peak white level is adjustable via the I
2
C-bus.
The circuit also contains a soft-clipper, which prevents that the
high frequency peaks in the output signal become too high. The
difference between the PWL level and the soft clipping level is
adjustable via the I
2
C-bus in a few steps.
Switch-off control
During switch-off of the TV receiver a fixed beam current is
generated by the black current control circuit. This current
ensures that the picture tube capacitance is discharged. During
the switch-off period the vertical deflection is placed in an
overscan position so that the discharge is not visible on the
screen.
9.1.7Synchronisation (diagram C1)
Horizontal synchronisation
Before the video processor IC7301 can generate horizontal
drive pulses, the supply voltages on both pins 23 and 53 must
be present. After the start-up command of the µP (via the I
the BOCMA starts giving horizontal pulses.
To obtain a smooth switch-on/off behaviour the horizontal drive
signal is switched-on/off via the soft-start/soft-stop procedure.
This function is realised by means of a variation of the T-ON of
the horizontal drive pulse. When the soft-start procedure is
completed the horizontal output is gated with the flyback pulse
2
C)
Page 64
GB 64A10E9.
Circuit descriptions and abbreviation list
so that the horizontal output transistor cannot be switched-on
during the flyback time.
An additional function of the IC is the ‘low-power start-up’
feature. For this function a supply voltage with a value between
3 and 5 V must be available at the start-up pin (required current
5 mA typical).
In this condition the horizontal drive signal has the nominal TOFF and the T-ON grows gradually from zero to the nominal
value as indicated in the soft-start behaviour. As soon as the 8
V supply is present, the switch-on procedure (e.g. closing of the
second loop) is continued.
The horizontal drive signal is generated by an internal VCO,
which is running at a frequency of 25 MHz. This oscillator is
stabilised to that frequency by using the 12 MHz frequency of
the crystal oscillator as a reference. The horizontal sawtooth
oscillator signal is converted into a square wave voltage. This
square wave LINEDRIVE1 signal at pin 56 is fed to the line
output stage. The time constant of the sync. circuit (different for
VCR and weak terrestrial signals) is automatically internally
determined by the BOCMA.
On pin 57 of IC7301 the sandcastle pulse (SC) is available.
This is a 2-state pulse that is used for the synchronisation of the
(optional) IC's 7405 and 7403.
The dynamic phase-correction signal at pin 58 of IC7301 gives
horizontal shift corrections during beam current changes. If the
beam current increases (more white), the EHT voltage
decreases so the picture will become off-centre. This signal
takes care that the picture remains in the middle of the screen
by adapting the timing of the horizontal drive pulse
(LINEDRIVE1).
9.1.9Vertical (frame) deflection (diagram A3)
For circuit description see A8 Training Manual: 4822 727
21613.
Differences with the A8 are:
•Item-numbers are different from the one mentioned in the
text.
•Additional protection circuit “Prot E-W” has been removed.
Vertical synchronisation
The vertical sawtooth generator drives the vertical output drive
circuit. On pins 63 & 64 are 2 differential voltages
FRAMEDRIVE+ and FRAMEDRIVE-. These create differential
currents, which are fed to the vertical output stage. Via the I
bus adjustments can be made of the horizontal and vertical
geometry. t.
E/W correction
The EW_DRIVE signal at pin 62 takes care for the correct pincushion correction for 110° tubes. It also corrects breathing of
the picture due to beam current variations (EHT varies
dependent of the beam current: e.g. for widescreen without
load this is 31.5 kV and with load (1.5 mA) 29.5 kV). This
correction is derived from the signal on pin 34 (EHT_INFO)
which “measures” the beam-current. This signal has two
functions:
•To correct the pin-cushion due to beam current variations.
•As protection signal. As the beam current is too high
(voltage on pin 34 > 3. 5 V) the set is forced into protection.
9.1.8Horizontal (line) deflection (diagram A2)
For circuit description see A8 Training Manual: 4822 727
21613.
Differences with the A8 are:
•Item-numbers are different from the one mentioned in the
text.
•Addditional Panorama circuit
•Output voltages: absense of the +30 V for the East-West
protection.
2
C-
Page 65
Circuit descriptions and abbreviation list
9.1.10 Audio processing (diagram C6 & A6)
TUNER
AGC
IF
SAW
VIF
7301 BOCMA
1
2
7
SOUND
TRAPS
GB 65A10E9.
+8V
3326
16
+8V
7305
CVBS
SIF
MONO-IN
SC1-L-IN
SC1-R-IN
SC2-L-IN
SC2-R-IN
FRONT-IN-L
FRONT-IN-R
SC1-R-OUT
SC1-L-OUT
7051 MSP 3451G
50
A/D
47
44
45
41
42
38
39
SAW
VSIF
DEMOD.
INDENT
A/D
A/D
INPUT SWITCH
8
9
DSPD/A
QSS DEMOD.
+ AM DETECTION
D/A
D/A
3301
11
7702
+27V
2
5
7703
6
2
ACTIVE
SUBWOOFER
2
4
3
21
20
18
17
23
29
28
SOUND
ENABLE
12
7
8
MUTE
7
1
7307
3302
L
R
L
HP
R
CL 06532012_012.eps
3327
180200
Introduction
The following systems are available:
•Basic : FM/AM mono (all standards).
•NICAM : FM stereo / NICAM B/G, D/K, I, L/L’.
•2CS : FM stereo / dual language (all standards 4.5, 5.5, 6.5
MHz).
All A10E sets contain one of ITT's Multistandard Sound
Processing IC's for sound decoding:
•MSP3415D:Europe & AP decoding, Stereo incl.
NICAM.
•MSP3451G:Global decoding, Virtual Dolby.
This IC takes care of the main FM, AM and NICAM sound
decoding.
The analogue input and output sections of MSP offer wide
range of switching facilities such that it is possible to distribute
all possible source signals (internal and external) to the desired
output channels (main, headphone or SCART outputs).
All MSP versions contain digital audio processing, used for the
basic left/right stereo sound, such as bass, treble, balance,
incredible sound and spatial and source selection (SIF-signal,
EXT1 or EXT2).
In addition to that, the MSP3451 is also able to perform Virtual
Dolby, a Dolby approved sound mode for surround sound
reproduction with left/right speakers only.
Figure 9-3
Basic
The MSP is used as sound decoder in all cases of
transmission.
NICAM
This high quality digital audio format is used in Eastern Europe,
Belgium, France, and UK, while NICAM LL’ is being used in
France.
The IF output from the tuner is filtered by SAW filters. AM
sound is directly demodulated from the SIF. The L/L’ switching
is done for the BOCMA and also on the SAW filter to select the
appropriate filter (SEL_IF_LL signal from µP). The SIF from the
BOCMA (pin 11) passes through the high pass filter and
amplifier into the MSP input (pin 50) for further demodulation.
2CS
This analogue FM stereo audio standard is predominately used
in Germany and The Netherlands. It is also used on some cable
television networks.
The SIF from the BOCMA is available at its CVBS output (pin
11) and passes through the high pass filter and amplifier and
fed into the MSP input (pin 50) for further demodulation.
Signals of all standards of 2CS and MONO are demodulated by
MSP.
Source selection
•MSP3515D (stereo)
Page 66
GB 66A10E9.
Circuit descriptions and abbreviation list
This IC is an economised version of the MSP3410 that is used
in the MG-chassis. It can cover 2 stereo and 1 mono (AM)
input. Since more inputs are required, separate source
selectors are used (HEF4052, IC7650 and HEF4053, IC7630).
This selector has EXT1, EXT2, FRONT and SC1-OUT (Tuner)
as input and is connected to the SCART1 input of the
MSP3415. The SCART2 input is not used.
Since the MSP3415 has only one SCART output, which is
connected to the SCART1, a constant level output and
connection to SCART2 is not available. This is fixed by
connecting the HEF4052 input selector to the constant level
output and to SCART2.
To get a constant level output if the Tuner is selected, the
SCART1 output (Tuner at any time), has to be fed back to the
input selector and selected as input for the MSP (SCART1
input).
The MSP3415 has no separate output to drive a headphone.
Therefore the speaker outputs are hardwired (on the LSP) to
the headphone amplifier.
•MSP3451G (Virtual Dolby)
The MSP3451, which is used in all versions supporting Virtual
Dolby, is capable of supporting 4 stereo inputs and 1 mono
(AM) input. Therefore the extra input selector (HEF4052) is not
needed.
The MSP3451 is also capable of supporting 2 SCART outputs,
so the trick used in the MSP3415 set-up to get a constant level
output is not needed.
The MSP3451 has a separate headphone output, so sound
control be done separate from the speakers.
Audio decoding
At the input a choice can be made between two IF-signals; SIF
and SIFM.
The selected signal is fed to the AGC. After this, an ADC
converts the IF-signal to digital.
This digital signal can be processed by 2 demodulation
channels. The first one is able to handle FM and NICAM
signals. The second one can handle FM and AM signals.
Each channel contains a mixer to shift the incoming signal in
the frequency domain. This shift is determined by the value of
a DCO (Digital Controlled Oscillator).
After the down-mix, the signal is fed, via a filter, to a
discriminator. From here the AM, FM or NICAM demodulation
can be performed.
Both channels contain an 'automatic carrier mute' function,
which automatically mutes the output of the analogue section
when no carrier is detected.
After demodulation, the FM-signals are subjected to a deemphasis operation. After that the matrix of the stereo system
is applied.
Audio processing
The sound processing in A10E is completely done by the
MSP3415D for 'Stereo' sets and the MSP3451G for 'Virtual
Dolby' sets:
•Volume control is done by the user via the SOUND menu.
•Tone control in 'Stereo' sets is done via the BASS/TREBLE
control.
•Headphone control in 'Stereo'-sets is done via the
loudspeaker output of the MSP, no sound control possible.
In 'Virtual Dolby'-sets, the MSP has a separate Headphone
output so separate sound control is possible.
•Mute control can be done in different ways:
– System muting: via the SOUND_ENABLE line of the
Painter. Used during start-up/switch-off conditions, in
order to avoid audible plops.
– Headphone muting: the presence of a headphone is
detected by the FRONT_DETECT line. If present the
main speakers will be muted.
Automatic Volume Levelling (AVL)
One of the features of the MSP-family is AVL. If used, it limits
the big volume differences in the broadcast between e.g. news
transmissions and commercials or within a movie.
To be able to get a Dolby approval (for the Virtual Dolby sets),
the AVL feature must be switchable. Therefore, the AVL
feature is customer switchable via the menu.
Audio amplification (diagram A6)
The audio output stage is built around IC7702 , which is a
balanced amplifier, and is located on the LSP. It uses an
monolithic integrated power amplifier IC, the AN5277. The gain
of the amplifier is constant. This means that volume control has
to be done via the MSP.
The supply voltage is +27 V, generated by the power supply via
L5912
The AN5277 delivers an output of 2 x 10 W-RMS to 2 full range
speakers. A subwoofer is implemented, for 28” and 32”
PW6515 and for 29” FT5515.
Muting
There are 3 types of muting available: system mute,
headphone status mute and user mute.
•System muting - System muting is implemented for
“special events” such as channel/source change event,
loss of identification signal, on/off of set, during search and
auto store/program, sound mode change. This muting is
transparent to the user. Audio output should be muted
before the above “special events” occurred, to prevent
problems such as audible plop. Muting is done via the
SOUND-ENABLE line connected (via TS7701) to pin 8 of
the amplifier-IC and coming from the Painter. This signal is
inverted by TS7701, as a result of which at a low level of
the SOUND-ENABLE signal the IC will mute.
•Headphone status mute - A headphone status is available
to detect the presence of the headphone and mute the
main speakers if the headphone is detected. The
microprocessor will read the FRONT-DETECT status.
•User muting - This is a mute option available to the user.
The user select the MUTE option on the remote control to
switched off/on the sound output to the main loudspeaker
and the subwoofer.
Headphone amplifier (diagram A6)
The headphone amplifier is built around IC7703 (TDA1308T),
which is an integrated class AB stereo headphone driver.
The On Screen Display information is generated by the
microprocessor IC7064. The RGB and blanking signals for the
OSD are fed to the RGB/blanking input of the Video Processing
section of IC7301 via the same path as the teletext RGB/
blanking signals.
The control circuit of the BOCMA has a half tone input (pin 13)
which is used to reduce the contrast setting during mixed mode
operation for teletext and OSD signals. The output signal has
an amplitude of about 2 V black-to-white at nominal input
signals and nominal settings of the controls. To increase the
flexibility of the IC it is possible to insert OSD and/or teletext
signals directly at the RGB outputs. This insertion mode is
controlled via the Fast Blanking insertion input (pin 38).
Page 67
Circuit descriptions and abbreviation list
GB 67A10E9.
Teletext
Sets with the SAA55XX microprocessor have the capability of
decoding and displaying both 525-line and 625-line World
System Teletext and offer a 10 page Teletext memory.
The teletext function can be divided into the functions
described below:
•The Data Capture section takes in the analogue Composite
Video and Blanking Signal (CVBS), and from this extracts
the required data, which is then decoded and stored in
memory.
•The extraction of the data is performed in the digital
domain. The first stage is to convert the analogue CVBS
•signal into a digital form. This is done using an ADC
sampling at 12 MHz.
•The data slicer extracts the digital teletext data from the
incoming CVBS signal. This is performed by sampling the
CVBS signal and processing the samples to extract the
teletext data and clock.
•The data and clock recovery is then performed by a Multirate Video Input Processor (MulVIP). From the recovered
data and clock the following data types are extracted: WST
Teletext (625/525), Closed Caption, VPS and WSS. The
extracted data is stored in on-chip DRAM via the Memory
interface.
The capabilities of the display block are based on level 1.5
teletext. It consists of 25 rows each of 40 characters, with the
characters displayed being those from rows 0 to 24 of the page
memory. The display block supplies the RGB output signals.
For the display timing the signals VFB and HFB from the LSP
are used. The display timing arranges the timing of the RGB
signal in order to ensure a stable teletext picture:
•The VFB signal (pin 55) is derived from the vertical
deflection circuitry. This is a signal with active 'Low' sync
pulses.
•The HFB signal (pin 53) is derived from the horizontal
output stage. The HFB signal is a signal with active 'HIGH'
sync pulses.
Via the pins 46, 47 and 48 of IC7064 the B, G, R colour signals
are supplied respectively to the RGB switch of the
TDA888X.The output polarity of all these pins is active 'High'.
Via pin 52 of IC7064 the FBL (fast blanking) signal is supplied
to the RGB switch. Via the fast blanking signal the R, G, B
signals are inserted in the television picture.
NextView (EPG)
The EPG in A10 provides the TV viewer with information on the
programmes that are being broadcast that day by the first 20
pre-sets. Its functionality is based on the availability of
broadcasters transmitting Teletext pages with NexTView data.
In regions where no NexTView but still Teletext is broadcasted,
the A10 EPG feature provides easy access to common
Teletext pages with programme guide.
Blue, Red and Green. Pin 5 is the black current stabilisation
output.
Cut-off stabilisation is an auto-tuning loop (active during a fourline period prior to the end of a field blanking pulse) which
stabilises the black current of each RGB-channel sequentially
and independently. This is a new concept known as
‘Continuous Cathode Calibration’, provided by the BiMOS. In
this concept the cathode drive is adjusted at two points and
hence provides better accuracy of black level.
To protect the RGB-amplifier against picture tube flashover
discharge, an external protection circuit consisting of D6831,
D6833 and D6835 combined with 100 Ohm resistors R3831,
R3833 and R3835 is implemented. These diodes clamp the
cathode output voltage to VDD. To limit the diode current,
external resistors R3832, R3834 and R3836 of 1 kOhm are
connected in series with the cathode input of each gun, in
conjunction with the 2 kV sparkgaps in the CRT socket.
SCAVEM
The SCAVEM-circuitry is implemented in the layout of the
picture tube panel. It is thus not an extra module. SCAVEM
means SCAn VElocity Modulation. This means that the
horizontal deflection is influenced by the picture content. In an
ideal square wave, the sides are limited in slope by a limited
bandwidth (5 MHz).
SCAVEM will improve the slope as follows: At a positive slope,
a SCAVEM-current is generated which supports the deflection
current. The first half of the slope the spot is accelerated and
the picture is darker, while at the second half of the slope, the
spot is delayed and the slope becomes steeper.
At the end of the slope, the SCAVEM-current decays to zero
and the spot is at the original position. An overshoot occurs
which improves the impression of sharpness. At the negative
slope, the SCAVEM-current counteracts the deflection.
During the first half of the slope, the spot is delayed, the slope
becomes steeper.
During the second half the spot accelerates, the SCAVEMcurrent is zero at the end of the slope.
Via connector 0238, signal 'Y_MAIN_IN' is added to the emitter
of TS7864. Via the emitter follower formed with TS7860, this
signal is conveyed to the differentiator C2878 and R3864. Only
the high frequencies are differentiated (small RC-time). The
positive and negative pulses of this signal drive respectively
TS7861 and TS7865 into conductivity. The DC setting of the
output stage is set by R3870, R3871, R3872 and R3873. The
working voltage of the transistors is settled at half the supply
voltage.
At the positive section of the pulse, the current flows through
R3887 and C2869, the SCAVEM-coil and TS7863. At the
negative section of the pulse, the current flows through R3886
and C2869, the SCAVEM-coil and TS7862.
9.1.12 CRT / SCAVEM / Rotation (diagram B / B / A7)
RGB amplifiers
The integrated RGB video amplifier (IC7830 located on the
CRT-panel) has three amplifier channels inside and drives the
three cathodes of the colour CRT. The main features of this IC
(TDA6107Q) are :
•This amplifier is connected to 200 V only (13 V reference is
generated internally).
•Black current stabilisation output is also generated
internally and this signal goes directly to the BiMOS
feedback input.
•Thermal protection.
The amplifiers are basically 'negative feedback OpAmps'
located inside the IC. Pins 1, 2 and 3 are inverting inputs for
Green, Red and Blue; pins 7, 8 and 9 are cathode outputs for
Rotation
In sets with a rotation coil (widescreen sets ≥ 32"), the amount
of frame rotation is adjusted with the TILT-output of the Painter
(pin 1).
algorithm that installs TV sets directly
from cable network by means of a
predefined TXT page
ADCAnalogue Digital Converter
AFCAutomatic Frequency Control: control
signal used to tune to the correct
frequency
AGCAutomatic Gain Control: algorithm that
controls the video input of the
featurebox
AMAmplitude Modulation
ARAspect Ratio: 4 by 3 or 16 by 9
Artisticsee Painter 2.5: main processor
AVLAutomatic Volume Level
BGSystem B and G
BLKINBlack current information
B-SC1-INBlue SCART1 in
B-SC2-INBlue SCART2 in
B-TXTBlue teletext
BOCMABimos one Chip Mid-end Architecture
C-FRONTChrominance front input
CLConstant Level: audio output to
connect with an external amplifier
ComPairComputer aided rePair
CRTCathode Ray Tube or picture tube
CSMCustomer Service Mode
CTIColour Transient Improvement:
manipulates steepness of chroma
transients
CVBSComposite Video Blanking and
Synchronisation
CVBS-EXTCVBS signal from external source
(VCR, VCD, etc.)
CVBS-INTCVBS signal from Tuner
CVBS-MONCVBS monitor signal
CVBS-TER-OUTCVBS terrestrial out
DFUDirection For Use: description for the
end user
DNRDigital Noise Reduction: noise
reduction feature of the box
DSPDigital Signal Processing
DSTDealer Service Tool: special remote
control designed for dealers to enter
e.g. service mode
DVDDigital Versatile Disc
DYN-PHASE-CORRDynamic phase correction
EHTExtra High Tension
EHT-INFOExtra High Tension information
EPGElectronic Program Guide: system
used by broadcasters to transmit TV
guide information (= NexTView)
EWEast West, related to horizontal
deflection of the set
EXTExternal (source), entering the set via
SCART or via cinches
FBLFast Blanking: DC signal
accompanying RGB signals
FBL-SC1-INFast blanking signal for SCART1 in
FBL-SC2-INFast blanking signal for SCART2 in
FBL-TXTFast Blanking Teletext
FILFilament supply voltage
FMField Memory or Frequency
G-SC2-INGreen SCART2 in
G-TXTGreen teletext
HAHorizontal Acquisition: horizontal sync
pulse coming out of the BOCMA
HFBHorizontal Flyback Pulse: horizontal
sync pulse from large signal deflection
BOCMAHigh-end video Input Processor: video
and chroma decoder of A10E
HPHeadphone
InterlacedScan mode where two fields are used
to form one frame. Each field contains
half the number of the total amount of
lines. The fields are written in “pairs”,
causing line flicker.
IO-BUSIn/Out - Bus
Last StatusThe settings last chosen by the
customer and read and stored in RAM
or in the NVM. They are called at start-
up of the set to configure it according
the customers wishes
LEDLight Emitting Diode
LINE-DRIVELine drive signal
LSPLarge signal panel
MSPMultistandard Sound Processor: ITT
sound decoder of A10E
MUTEMute-Line
NCNot Connected
NICAMNear Instantaneously Companded
Audio Multiplexing
NVMNon Volatile Memory: IC containing
TV related data e.g. alignments
O/COpen Circuit
ON/OFF LEDOn/Off control signal for the LED
OSDOn Screen Display
PainterOn Screen Display, Teletext and
Control; also named Artistic
(SAA5565)
P50Project 50 communication: protocol
between TV and peripherals
PCBPrinted Circuit board
PTPPicture Tube Panel
RAMRandom Access Memory
RCRemote Control
RC5RC5 signal from the remote control
receiver
RESETReset signal
ROMRead Only Memory
SAMService Alignment Mode
SCSandcastle: pulse derived from sync
signals
SCAVEMScan Velocity Modulation
S/CShort Circuit
SC1-OUTSCART output of the MSP audio IC
SC2-B-INSCART2 Blue in
SC2-C-INSCART2 chrominance in
SC2-OUTSCART output of the MSP audio IC
SIFSound Intermediate Frequency
SIMM80-fold connector between LSP and
SSB
SNDL-SC1-INSound left SCART1 in
SNDL-SC1-OUTSound left SCART1 out
SNDL-SC2-INSound left SCART2 in
SNDL-SC2-OUTSound left SCART2 out
SNDR-SC1-INSound right SCART1 in
SNDR-SC1-OUTSound right SCART1 out
SNDR-SC2-INSound right SCART2 out
SNDR-SC2-OUTSound right SCART2 out
SNDS-VL-OUTSurround sound left variable level out
SNDS-VR-OUTSurround sound right variable level out
SNERTSynchronous No parity Eight bit
Reception and Transmit
SSBSmall Signal Board
STBYStandby
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Circuit descriptions and abbreviation list
SWSubwoofer
TXTTeletext
µ
Pmicroprocessor
V-BATmain supply for deflection (mostly 141
VFBVertical Flyback Pulse: vertical sync
VLVariable Level out: processed audio
WYSIWYRWhat You See Is What You Record:
XTALQuartz crystal
V)
pulse coming from the feature box
output towards external amplifier
record selection that follows main
picture and sound