Copyright 2004 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.
Top Control Panel (FL9)(Diagram E) 5555
Power Supply PIP Panel(Diagram F1) 5658-59
Tuner IF and Demodulator PIP(Diagram F2) 5758-59
Linearity & Panorama Panel(Diagram G) 6060
LTI/CTI Interface Panel(Diagram H) 6162
Front Interface Panel (PV2)(Diagram J) 6363
Front Interface Panel (FL-9) (Diagram J) 64 64
8. Alignments65
9. Circuit Descriptions 73
Abbreviation List82
IC Data Sheets84
10 Spare Parts List86
11 Revision List 90
Published by BB 0465 Service PaCEPrinted in the NetherlandsSubject to modificationEN 3122 785 14470
Page 2
EN 2L04A AA1.
Technical Specifications, Connections, and Chassis Overview
1.Technical Specifications, Connections, and Chassis Overview
Notes:
•Described specifications are valid for the whole product
range.
•Figures below can deviate slightly from the actual situation,
due to different set executions.
1-Ground GND H
2-Ground GND H
3-Y 1 V_pp / 75 ohm jq
4-C 0.3 V_pp / 75 ohm jq
Page 3
Technical Specifications, Connections, and Chassis Overview
1.3Chassis Overview
B1
B2
CRT
ECO
SCAVEM
CRT PANEL
EN 3L04A AA1.
SIDE AV PANEL +
D
HEADPHONE
LTI/CTI INTERFACE
H
PANEL
F1
POWER SUPPLY
TUNER IF &
F2
DEMODULATION
LINEARITY &
G
PANORAMA PANEL
PIP PANEL
Figure 1-3 PWB location
MONO
CARRIER
TOP CONTROL PANEL
FRONT INTERFACE PANEL
POWER SUPPLY
LINE DEFLECTION
TUNER IF
HERCULES
FEATURES & CONNECTIVITIES
CLASS D AUDIO AMPLIFIER
AUDIO AMPLIFIER
REAR I/O CINCH
FRONT CONTROL
DVD POWER SUPPLY
E_14480_110.eps
E
J
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
060504
Page 4
EN 4L04A AA2.
Safety and Maintenance Instructions, Warnings, and Notes
2.Safety and Maintenance Instructions, Warnings, and Notes
2.1Safety Instructions
Safety regulations require that during a repair:
•Due to the chassis concept, a very large part of the circuitry
(incl. deflection) is 'hot'. Therefore, connect the set to the
mains via an isolation transformer.
•Replace safety components, indicated by the symbol h,
only by components identical to the original ones. Any
other component substitution (other than original type) may
increase risk of fire or electrical shock hazard.
•Wear safety goggles when you replace the CRT.
Safety regulations require that after a repair, you must return
the set in its original condition. Pay, in particular, attention to
the following points:
•General repair instruction: as a strict precaution, we advise
you to re-solder the solder connections through which the
horizontal deflection current is flowing. In particular this is
valid for the:
1. Pins of the line output transformer (LOT).
2. Fly-back capacitor(s).
3. S-correction capacitor(s).
4. Line output transistor.
5. Pins of the connector with wires to the deflection coil.
6. Other components through which the deflection current
flows.
Note: This re-soldering is advised to prevent bad connections
due to metal fatigue in solder connections, and is therefore only
necessary for television sets more than two years old.
•Route the wire trees and EHT cable correctly and secure
them with the mounted cable clamps.
•Check the insulation of the mains cord for external
damage.
•Check the strain relief of the mains cord for proper function,
to prevent the cord from touching the CRT, hot
components, or heat sinks.
•Check the electrical DC resistance between the mains plug
and the secondary side (only for sets that have an isolated
power supply). Do this as follows:
1. Unplug the mains cord and connect a wire between the
two pins of the mains plug.
2. Turn on the main power switch (keep the mains cord
unplugged!).
3. Measure the resistance value between the pins of the
mains plug and the metal shielding of the tuner or the
aerial connection of the set. The reading should be
between 4.5 MΩ and 12 MΩ.
4. Switch the TV 'off' and remove the wire between the
two pins of the mains plug.
•Check the cabinet for defects, to prevent the possibility of
the customer touching any internal parts.
2.3Warnings
•In order to prevent damage to ICs and transistors, avoid all
high voltage flashovers. In order to prevent damage to the
picture tube, use the method shown in Fig. 2-1, to
discharge the picture tube. Use a high voltage probe and a
multi-meter (position V_dc). Discharge until the meter
reading is 0 V (after approx. 30 s).
V
Figure 2-1 Discharge picture tube
•All ICs and many other semiconductors are susceptible to
electrostatic discharges (ESD, w). Careless handling
during repair can reduce life drastically. Make sure that,
during repair, 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 potential. Available ESD
protection equipment:
– Complete kit ESD3 (small tablemat, wristband,
connection box, extension cable and ground cable)
4822 310 10671.
– Wristband tester 4822 344 13999.
•Together with the deflection unit and any multi-pole unit,
flat square picture tubes form an integrated unit. The
deflection and the multi-pole units are set optimally at the
factory. We do not recommend adjusting this unit during
repair.
•Be careful during measurements in the high voltage
section and on the picture tube.
•Never replace modules or other components while the unit
is 'on’.
•When you align the set, use plastic rather than metal tools.
This will prevent any short circuits and the danger of a
circuit becoming unstable.
2.4Notes
E_06532_007.eps
250304
2.2Maintenance Instructions
We recommend a maintenance inspection carried out by
qualified service personnel. The interval depends on the usage
conditions:
•When a customer uses the set under normal
circumstances, for example in a living room, the
recommended interval is three to five years.
•When a customer uses the set in an environment with
higher dust, grease, or moisture levels, for example in a
kitchen, the recommended interval is one year.
•The maintenance inspection includes the following actions:
1. Perform the 'general repair instruction' noted above.
2. Clean the power supply and deflection circuitry on the
chassis.
3. Clean the picture tube panel and the neck of the picture
tube.
2.4.1 General
•Measure the voltages and waveforms with regard to the
chassis (= tuner) ground (H), or hot ground (I), depending
on the tested area of circuitry.
•The voltages and waveforms shown in the diagrams are
indicative. Measure them in the Service Default Mode (see
chapter 5) with a color bar signal and stereo sound
(L: 3 kHz, R: 1 kHz unless stated otherwise) and picture
carrier at 475.25 MHz for PAL, or 61.25 MHz for NTSC
(channel 3).
•Where necessary, measure the waveforms and voltages
with (D) and without (E) aerial signal. Measure the
voltages in the power supply section both in normal
operation (G) and in standby (F). These values are
indicated by means of the appropriate symbols.
Page 5
Safety and Maintenance Instructions, Warnings, and Notes
EN 5L04A AA2.
•The picture tube panel 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 interchangeable per position with the
semiconductors in the unit, irrespective of the type
indication on these semiconductors.
2.4.2 Schematic Notes
•All resistor values are in ohms and the value multiplier is
often used to indicate the decimal point location (e.g. 2K2
indicates 2.2 kohm).
•Resistor values with no multiplier may be indicated with
either an "E" or an "R" (e.g. 220E or 220R indicates 220
ohm).
•All capacitor values are expressed in micro-farads
(µ= x 10^-6), nano-farads (n= x 10^-9), or pico-farads
(p= x 10^-12).
•Capacitor values may also use the value multiplier as the
decimal point indication (e.g. 2p2 indicates 2.2 pF).
•An "asterisk" (*) indicates component usage varies. Refer
to the diversity tables for the correct values.
•The correct component values are listed in the Electrical
Replacement Parts List. Therefore, always check this list
when there is any doubt.
2.4.3 Practical Service Precautions
•Adjust your solder tool so that a temperature around
217 - 220 deg. C is reached at the solder joint.
•Do not mix lead-free soldering tin with leaded soldering tin;
this will lead to unreliable solder joints!
•Use only original spare parts listed in this manual. These
are lead-free parts!
•On the website www.atyourservice.ce.philips.com you can
find more information on:
– Aspects of lead-free technology.
– BGA (de-)soldering, heating-profiles of BGAs used in
Philips sets, and others
•It makes sense to avoid exposure to electrical shock.
While some sources are expected to have a possible
dangerous impact, others of quite high potential are of
limited current and are sometimes held in less regard.
•Always respect voltages. While some may not be
dangerous in themselves, they can cause unexpected
reactions - reactions that are best avoided. Before reaching
into a powered TV set, it is best to test the high voltage
insulation. It is easy to do, and is a good service precaution.
•Before powering up the TV set with the back cover off
(or on a test fixture), attach a clip lead to the CRT DAG
ground and to a screwdriver blade that has a well insulated
handle. After the TV is powered "on" and high voltage has
developed, probe the anode lead with the blade, starting at
the case of the High Voltage Transformer (flyback - IFT).
Move the blade to within two inches of the connector of the
CRT. If there is an arc, you found it the easy way, without getting a shock! If there is an arc to the
screwdriver blade, replace the part that is causing the
problem: the High Voltage Transformer or the lead (if it is
removable).
2.4.4 Lead Free Solder
This set is manufactured with lead-free production technology.
This is also indicated on the PWB by the PHILIPS lead-free
logo (either by a service-printing or by a sticker).
P
b
Figure 2-2 Lead-free logo
This set is produced with lead-free solder alloy as well as with
lead-free sub-parts. It can be considered as lead-free.
Due to this fact, some rules have to be respected by the
workshop during a repair:
•Use only lead-free soldering tin Philips SAC305 with order
code 0622 149 00106. If lead-free solder paste is required,
please contact the manufacturer of your soldering
equipment.
•Use only adequate solder tools applicable for lead-free
soldering tin.
Page 6
EN 6L04A AA3.
3.Directions for Use
You can download this information from the following website:
http://www.philips.com/support
1. Click on “Downloads and Troubleshooting” [1].
2. Fill in the TV model/type number in the field “Which Model/
Type?” [2] and click on “Search” [3].
Note: The correct model/typenumber can be found on the
rear cover of the set. If you do not have the complete
model/typenumber, just fill in e.g. “32PW95” or “PW95” (do
not use wildcards).
3. When results are returned, click on the desired model/
typenumber under “Model” [4].
4. Now, click on the “Owner's manual” [5] in the desired
language. To read/open the PDF files you can download
and install the free Acrobat Reader
Note: Figures below can deviate slightly from the actual
situation, due to different set executions.
4.1Set Disassembly
Warning: Be sure to disconnect the AC power from the set
before opening it.
4.1.1 Rear Cover
1. Remove all fixation screws of the rear cover (do not forget
the screws that hold the rear connection panel).
2. Pull the rear cover backwards to remove it.
4.2Service Position
Before placing the Mono Carrier in its service position, remove
the Front Interface assy/panel (see paragraph “Front Interface
Assy/Panel removal”), the Side AV assy/panel (see paragraph
“Side AV Assy/Panel removal”) and the PIP assy/panel (if
exists) (see paragraph “PIP Assy/Panel removal”).
1. Disconnect the degaussing coil [1].
2. Release the two fixation clamps (at the mid left and mid
right side of the bracket), and remove the bracket from the
bottom tray, by pulling it backwards [2].
3. Turn the chassis tray 90 degrees counter clockwise.
4. Move the panel bracket somewhat to the left and flip it 90
degrees [3], with the components towards the CRT.
5. Turn the panel bracket with the rear I/O toward the CRT.
6. Place the hook of the tray in the fixation hole of the cabinet
bottom [4] and secure it.
4.3Assies/Panels Removal
4.3.1Front Interface Assy/Panel Removal
1
2
3
1
3
E_14480_049.eps
110204
1
2
A
3
4
E_14480_048.eps
B
110204
Figure 4-1 Front interface assy/panel removal
Figure 4-2 Front interface assy/panel removal
1. Remove the complete module from the bottom plate, by
pulling the two fixation clamps upward [1], while sliding the
module away from the CRT [2]. Note: these clamps are
difficult to access.
2. Release the two fixation clamps [3] at the side of the
bracket, and lift the panel out of the bracket (it hinges at
one side).
4.3.2Side AV Assy/Panel Removal
E_14480_050.eps
170204
Figure 4-3 Side AV assy/panel removal
1. Remove the two fixation screws, and remove the complete
Side AV assembly.
2. Release the two fixation clamps, and lift the panel out of the
bracket.
Page 8
EN 8L04A AA4.
4.3.3 LTI/CTI Interface Panel Removal
Remove the LTI/CTI Interface panel from the Mono Carrier, by
disconnecting it from connector 1212.
4.3.4 Top Control Assy/Panel Removal
1. Remove the two fixation screws.
2. Push the assy a little bit upwards, and then pull it
backwards to release it from the front hinge.
3. Lift the panel from its bracket, while releasing the two
fixation clamps. The panel hinges on the other side.
4.3.5 Linearity Assy/Panel Removal
2
Mechanical Instructions
Figure 4-4 Linearity assy/panel removal
1. Release the two fixation clamps [1] to lift the panel out of
the bracket [2].
4.3.6 PIP Assy/Panel Removal
1. Release the two fixation clamps to lift the panel out of the
bracket.
4.4Set Re-assembly
To re-assemble the whole set, do all processes in reverse
order.
Note: before you mount the rear cover, perform the following
checks:
1. Check whether the AC power cord is mounted correctly in
its guiding brackets.
2. Check whether all cables are replaced in their original
position
1
1
E_14480_051.eps
270204
Page 9
Service Modes, Error Codes and Fault Finding
5.Service Modes, Error Codes and Fault Finding
Index:
1. Test Points.
2. Service Modes.
3. Problems and Solving Tips (related to CSM).
4. ComPair.
5. Error Codes.
6. The Blinking LED Procedure.
7. Protections.
8. Repair Tips.
5.1Test Points
The chassis is equipped with test points printed on the circuit
board assemblies. These test points refer to the functional
blocks:
Perform measurements under the following conditions:
•Television set in Service Default Alignment Mode.
•Video input: Colour bar signal.
•Audio input: 3 kHz left channel, 1 kHz right channel.
5.2Service Modes
Service Default mode (SDM) & Service Alignment Mode (SAM)
offers several features for the service technician, while the
Customer Service Mode (CSM) is used for communication
between the call centre and the customer.
This chassis also offers the option of using ComPair, a
hardware interface between a computer and the TV chassis. It
offers the abilities of structured troubleshooting, error code
reading, and software version readout for all these chassis.
Minimum requirements for ComPair: a Pentium processor, a
Windows OS, and a CD-ROM drive (see "ComPair" section).
Abbreviations: A = AP, C = NTSC, F = Full TXT, N = Non TXT.
Hercules
Diversity12 NCChecksumROM SizsSpecial Features
TDA120109352 754 36557
TDA120119352 754 37557
TDA120219352 754 41557
TDA120219352 754 43557
TDA120119352 754 45557
Page 10
EN 10L04A AA5.
Service Modes, Error Codes and Fault Finding
5.2.1 Service Default Mode (SDM)
Purpose
•To create a predefined setting for measurements to be
made.
•To override software protections.
•To start the blinking LED procedure.
Specifications
•Tuning frequency:
For sets with PLL tuning AP-NTSC: Channel 3 is tuned
(61.25 MHz).
•For sets with PLL tuning AP-PAL: 475.25 MHz is tuned
•Colour system:
– For AP-NTSC: NTSC
– For AP-PAL: PAL B/G
•All picture settings at 50% (brightness, colour contrast,
hue).
•Bass, treble and balance at 50 %; volume at 25 %.
•All service-unfriendly modes (if present) are disabled. The
service unfriendly modes are:
– Timer / Sleep timer.
– Child / parental lock.
– Blue mute.
– Hotel / hospital mode.
– Auto shut off (when no 'IDENT' video signal is received
for 15 minutes).
– Skipping of non-favourite presets / channels.
– Auto-storage of personal presets.
– Auto user menu time-out.
– Auto Volume Levelling (AVL).
How to enter
To enter SDM, use one of the following methods:
•Press the following key sequence on the remote control
transmitter: '0 6 2 5 9 6' directly followed by the 'MENU'
button (do not allow the display to time out between entries
while keying the sequence).
•Short jumper wires 9252 and 9275 on the family board (see
Fig. 8-1) and apply mains. Then press the power button
(remove the short after start-up).
Caution: Entering SDM by shorting wires 9252 and 9275
will override the +8V-protection. Do this only for a short
period. When doing this, the service-technician must know
exactly what he is doing, as it could damage the television
set.
•Or via ComPair (with the ComPair ‘Tools’, it should be
possible to enter SDM via the ComPair interface).
After entering SDM, the following screen is visible, with SDM in
the upper right corner of the screen to indicate that the
television is in Service Default Alignment Mode.
How to navigate
Use one of the following methods:
•When you press the MENU button on the remote control,
the set will switch on the normal user menu in the SDM
mode.
•On the TV, press and hold the 'VOLUME down' and press
the 'CHANNEL down' for a few seconds, to switch from
SDM to SAM and reverse.
How to exit
Switch the set to STANDBY by pressing the POWER button on
the remote control transmitter or the television set.
If you turn the television set off by removing the Mains (i.e.,
unplugging the television) without using the POWER button,
the television set will remain in SDM when mains is re-applied,
and the error buffer is not cleared.
5.2.2 Service Alignment Mode (SAM)
Purpose
•To change option settings.
•To display / clear the error code buffer.
•To perform alignments.
Specifications
•Run timer (maximum five digits displayed)
•Software version, Error & Option Bytes display
•Clear error buffer.
•Option settings
•AKB switching
•Software alignments (Tuner, 2 Tuner PIP, White Tone,
Geometry & Audio)
•NVM Editor
•ComPair Mode switching
How to enter
To enter SAM, use one of the following methods:
•Press the following key sequence on the remote control
transmitter: '0 6 2 5 9 6' directly followed by the “On Screen
Display icon “i +” button (do not allow the display to time out
between entries while keying the sequence).
•Or via ComPair.
After entering SAM, the following screen is visible, with SAM in
the upper right corner of the screen to indicate that the
television is in Service Alignment Mode.
. Clear Clear ?
. Options
. AKB On
. Tuner
. 2 Tuner PIP*
. White Tone
. Geometry
. Audio
. NVM Editor
. ComPair on
optional
*
Figure 5-2 SAM menu
E_14480_113.eps
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Service Modes, Error Codes and Fault Finding
EN 11L04A AA5.
Menu explanation
1. LLLLL. This represents the run timer. The run timer counts
normal operation hours, but does not count standby hours
(maximum four digits displayed).
2. AAABCD-X.Y. This is the software identification of the
main microprocessor:
– A = the project name (L04).
– B = the region: E= Europe, A= Asia Pacific, U= NAFTA,
L= LATAM.
– C = the software diversity:
•Europe: T = 1 page TXT, F = Full TXT, V = Voice
control.
•LATAM and NAFTA: N = Stereo non-dBx, S =
Stereo dBx.
•Asian Pacific: F = Full TXT, N = non TXT, C =
NTSC.
•ALL regions: M = mono, D = DVD, Q = Mk2.
– D = the language cluster number.
– X = the main software version number (updated with a
major change that is incompatible with previous
versions).
– Y = the sub software version number (updated with a
minor change that is compatible with previous
versions).
3. SAM. Indication of the Service Alignment Mode.
4. Error Buffer. Shows all errors detected since the last time
the buffer was erased. Five errors possible.
5. Option Bytes. Used to set the option bytes. See 'Options'
in the Alignments section for a detailed description. Seven
codes are possible.
6. Clear. Erases the contents of the error buffer. Select the
CLEAR menu item and press the MENU RIGHT key. The
content of the error buffer is cleared.
7. Options. Used to set the option bits. See 'Options' in the
Alignments section for a detailed description.
8. AKB. Used to disable (Off) or enable (On) the 'black
current loop' (AKB = Auto Kine Bias).
9. Tuner. Used to align the tuner. See 'Tuner' in the
Alignments section for a detailed description.
10. 2 Tuner PIP. Used to align the tuner PIP (optional)
11. White Tone. Used to align the white tone. See 'White Tone'
in the Alignments section for a detailed description.
12. Geometry. Used to align the geometry settings of the
television. See 'Geometry' in the Alignments section for a
detailed description.
13. Audio. No audio alignment is necessary for this television
set.
14. NVM Editor. Used to change the NVM data in the
television set.
15. ComPair Mode. Used to switch on the television to ISP
mode (for uploading software)
How to navigate
•In SAM, select menu items with the MENU UP/DOWN keys
on the remote control transmitter. The selected item will be
highlighted. When not all menu items fit on the screen, use
the MENU UP/DOWN keys to display the next / previous
menu items.
•With the MENU LEFT/RIGHT keys, it is possible to:
– Activate the selected menu item.
– Change the value of the selected menu item.
– Activate the selected submenu.
•In SAM, when you press the MENU button twice, the set
will switch to the normal user menus (with the SAM mode
still active in the background). To return to the SAM menu
press the MENU or STATUS/EXIT button.
•When you press the MENU key in while in an SDAM
submenu, you will return to the previous menu.
How to store SAM settings
To store settings changed in SAM leave the top level SAM
menu by using the POWER button on the remote control
transmitter or the television set.
How to exit
Switch the set to STANDBY by pressing the POWER button on
the remote control transmitter or the television set.
If you turn the television set off by removing the mains (i.e.,
unplugging the television) without using the POWER button,
the television set will remain in SAM when mains is re-applied,
and the error buffer is not cleared.
5.2.3Customer Service Mode (CSM)
Purpose
The Customer Service Mode shows error codes and
information on the TV operation settings. The call centre can
instruct the customer to enter CSM by telephone and read off
the information displayed. This helps the call centre to
diagnose problems and failures in the TV set before making a
service call.
The CSM is a read-only mode; therefore, modifications are not
possible in this mode.
How to enter
To enter CSM, press the following key sequence on the remote
control transmitter: '1 2 3 6 5 4' (do not allow the display to time
out between entries while keying the sequence).
Upon entering the Customer Service Mode, the following
screen will appear:
1 00028 L04AF1 1.4 CSM
2 CODES 0 0 0 0 0
3 OP 000 057 140 032 120 128 000
4 nnXXnnnn/nnX
5 P3C-1
6 NOT TUNED
7 PAL
8 NICAM STEREO
9 CO 50 CL 50 BR 50 HU 0
0 AVL Off BS 50
E_14480_114.eps
Figure 5-3 CSM menu
Menu explanation
1. Indication of the service mode (CSM = Customer Service
Mode).
2. Reserved item.
3. Software identification of the main microprocessor (see
'Service Default Alignment Mode' for an explanation)
4. Reserved item for P3C call centres (AKBS stands for
Advanced Knowledge Base System).
5. Indicates the type of TV system or whether or not the
television is receiving an 'IDENT' signal on the selected
source. If no 'IDENT' signal is detected, the display will
read 'NOT TUNED'
6. Displays the last five errors detected in the error code
buffer.
How to exit
To exit CSM, use one of the following methods:
•Press the MENU, STATUS/EXIT, or POWER button on the
remote control transmitter.
•Press the POWER button on the television set.
060504
Page 12
EN 12L04A AA5.
Service Modes, Error Codes and Fault Finding
5.3Problems and Solving Tips Related to CSM
5.3.1 Picture Problems
Note: The problems described below are all related to the TV
settings. The procedures used to change the value (or status)
of the different settings are described.
Picture too dark or too bright
If:
•The picture improves when you have press the AUTO
PICTURE button on the remote control transmitter, or
•The picture improves when you enter the Customer
Service Mode
Then:
1. Press the AUTO PICTURE button on the remote control
transmitter repeatedly (if necessary) to choose
PERSONAL picture mode.
2. Press the MENU button on the remote control transmitter.
This brings up the normal user menu.
3. In the normal user menu, use the MENU UP/DOWN keys
to highlight the PICTURE sub menu (if necessary).
4. Press the MENU LEFT/RIGHT keys to enter the PICTURE
sub menu.
5. Use the MENU UP/DOWN keys (if necessary) to select
BRIGHTNESS.
6. Press the MENU LEFT/RIGHT keys to increase or
decrease the BRIGHTNESS value.
7. Use the MENU UP/DOWN keys to select PICTURE.
8. Press the MENU LEFT/RIGHT keys to increase or
decrease the PICTURE value.
9. Press the MENU button on the remote control transmitter
twice to exit the user menu.
10. The new PERSONAL preference values are automatically
stored.
White line around picture elements and text
If:
The picture improves after you have pressed the AUTO
PICTURE button on the remote control transmitter
Then:
1. Press the AUTO PICTURE button on the remote control
transmitter repeatedly (if necessary) to choose
PERSONAL picture mode.
2. Press the MENU button on the remote control transmitter.
This brings up the normal user menu.
3. In the normal user menu, use the MENU UP/DOWN keys
to highlight the PICTURE sub menu (if necessary).
4. Press the MENU LEFT/RIGHT keys to enter the PICTURE
sub menu.
5. Use the MENU UP/DOWN keys to select SHARPNESS.
6. Press the MENU LEFT key to decrease the SHARPNESS
value.
7. Press the MENU button on the remote control transmitter
twice to exit the user menu.
8. The new PERSONAL preference value is automatically
stored.
Snowy picture
To enter CSM, press the following key sequence on the remote
control transmitter: '123654' (do not allow the display to time
out between entries while keying the sequence).
Check CSM line 5. If this line reads 'Not Tuned,' check the
following:
•Antenna not connected. Connect the antenna.
•No antenna signal or bad antenna signal. Connect a proper
antenna signal.
•The tuner is faulty (in this case line 6, the Error Buffer line,
will contain error number 10). Check the tuner and replace/
repair the tuner if necessary.
Black and white picture
If:
•The picture improves after you have pressed the AUTO
PICTURE button on the remote control transmitter
Then:
1. Press the AUTO PICTURE button on the remote control
transmitter repeatedly (if necessary) to choose
PERSONAL picture mode.
2. Press the MENU button on the remote control transmitter.
This brings up the normal user menu.
3. In the normal user menu, use the MENU UP/DOWN keys
to highlight the PICTURE sub menu (if necessary).
4. Press the MENU LEFT/RIGHT keys to enter the PICTURE
sub menu.
5. Use the MENU UP/DOWN keys to select COLOR.
6. Press the MENU RIGHT key to increase the COLOR value.
7. Press the MENU button on the remote control transmitter
twice to exit the user menu.
8. The new PERSONAL preference value is automatically
stored.
Menu text not sharp enough
If:
•The picture improves after you have pressed the AUTO
PICTURE button on the remote control transmitter.
Then:
1. Press the AUTO PICTURE button on the remote control
transmitter repeatedly (if necessary) to choose
PERSONAL picture mode.
2. Press the MENU button on the remote control transmitter.
This brings up the normal user menu.
3. In the normal user menu, use the MENU UP/DOWN keys
to highlight the PICTURE sub menu (if necessary).
4. Press the MENU LEFT/RIGHT keys to enter the PICTURE
sub menu.
5. Use the MENU UP/DOWN keys to select PICTURE.
6. Press the MENU LEFT key to decrease the PICTURE
value.
7. Press the MENU button on the remote control transmitter
twice to exit the user menu.
8. The new PERSONAL preference value is automatically
stored.
5.4ComPair
5.4.1 Introduction
ComPair (Computer Aided Repair) is a service tool for Philips
Consumer Electronics products. ComPair is a further
development of the European DST (special remote control
transmitter for Service), which allows faster and more accurate
diagnostics. ComPair has three big advantages:
•ComPair helps you to get an understanding on how to
repair the chassis in a short time, by guiding you
systematically through the repair procedures.
•ComPair allows very detailed diagnostics (on I2C level)
and is therefore capable of accurately indicating problem
areas. You do not have to know anything about I2C
commands yourself because ComPair takes care of this.
•ComPair speeds up the repair time since it can
automatically communicate with the chassis (when the
microprocessor is working) and all repair information is
directly available. When ComPair is installed together with
the Force electronic manual of the L04A AA chassis,
schematics and CBAs are only a mouse-click away.
5.4.2 Specifications
ComPair consists of a Windows based faultfinding program
and an interface box between PC and the product. The
Page 13
Service Modes, Error Codes and Fault Finding
ComPair interface box is connected to the PC via a serial or
RS232 cable.
In the case of the L04 chassis, the ComPair interface box and
the TV communicate via a bi-directional service cable via the
service connector (connector 1005).
The ComPair faultfinding program is able to determine the
problem of the television set. ComPair can gather diagnostic
information in two ways:
•Automatic (by communication with the television):
ComPair can automatically read the contents of the entire
error buffer. Diagnosis is done on I2C level. ComPair can
access the I2C bus of the television. ComPair can send
and receive I2C commands to the microprocessor of the
television. In this way, it is possible for ComPair to
communicate (read and write) to devices on the I2C
busses of the television set.
•Manually (by asking questions to the services): Automatic
diagnosis is only possible if the microprocessor of the
television is working correctly, and only to a certain extent.
When this is not the case, ComPair will guide you through
the faultfinding tree by asking you questions (for example;
Does the screen give a picture? Click on the correct
answer: YES / NO) and showing you examples (for
example; Measure test-point I7 and click on the correct
oscillogram you see on the oscilloscope). You can answer
by clicking on a link (for example, text or a waveform
picture) that will bring you to the next step in the faultfinding
process.
By a combination of automatic diagnostics and an interactive
question and answer procedure, ComPair will enable you to
find most problems in a fast and effective way.
Beside fault finding, ComPair provides some additional features like:
•Uploading or downloading of presets.
•Management of preset lists.
•If both ComPair and the Force electronic service manual
are installed, all the schematics and CBAs of the television
set are available by clicking on the appropriate hyperlink.
•Example: Measure the DC-voltage on capacitor C2568
(Schematic/Panel) at the Mono-carrier.
– Click on the 'Panel' hyperlink to automatically show the
CBA with a highlighted capacitor C2568.
– Click on the 'Schematic' hyperlink to automatically
show the electronic position of the highlighted
capacitor.
Note: If you encounter any problems, contact your local
support desk.
5.5Error Codes
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, it is displayed at the left side and all other errors shift one
position to the right.
5.5.1How To Read The Error Buffer
EN 13L04A AA5.
9V DC
E_06532_008.eps
190204
5.4.3 How To Connect ComPair
1. First, install the ComPair Browser software on your PC
(see the Quick Reference Card for installation instructions).
2. Connect the RS232 interface cable between a free serial
(COM) port of your PC and the PC connector (marked with
'PC') of the ComPair interface.
3. Connect the mains adapter to the supply connector
(marked 'POWER 9V DC') on the ComPair interface.
4. Switch the ComPair interface 'off'.
5. Switch the television set 'off' (and remove the mains).
6. Connect the ComPair interface cable between the
connector on the rear side of the ComPair interface
(marked 'I2C') and the ComPair connector on the family
board (connector 1005).
7. Plug the mains adapter in the mains outlet and switch the
ComPair interface 'on'. The green and red LEDs light up
together. The red LED turns off after approximately 1
second, while the green LED remains lit.
8. Start the ComPair program and read the 'introduction'
chapter.
You can read the error buffer in 3 ways:
•On screen via the SDAM (if you have a picture).
Examples:
– ERROR: 0 0 0 0 0 : No errors detected
– ERROR: 6 0 0 0 0 : Error code 6 is the last and only
detected error
– ERROR: 9 6 0 0 0 : Error code 6 was detected first and
error code 9 is the last detected (newest) error
•Via the blinking LED procedure (when you have no
picture). See 'The Blinking LED Procedure'.
•Via ComPair.
Page 14
EN 14L04A AA5.
5.5.2 How To Clear The Error Buffer
The error code buffer is cleared in the following cases:
•By using the CLEAR command in the SDAM menu:
– To enter SAM, press the following key sequence on the
remote control transmitter: '062596' directly followed
by the “OSD" icon button (do not allow the display to
time out between entries while keying the sequence).
– Make sure the menu item CLEAR is highlighted. Use
the MENU UP/DOWN buttons, if necessary.
– Press the MENU RIGHT button to clear the error
buffer. The text on the right side of the 'CLEAR' line will
change from 'CLEAR?' to 'CLEARED'
•If the contents of the error buffer have not changed for 50
hours, the error buffer resets automatically.
Note: If you exit SAM by disconnecting the Mains from the
television set, the error buffer is not reset.
5.5.3 Error Codes
In case of non-intermittent faults, write down the errors present
in the error buffer and clear the error buffer before you begin
the repair. This ensures that old error codes are no longer
present.
If possible, check the entire contents of the error buffer. In
some situations, an error code is only the result of another error
and not the actual cause of the problem (for example, a fault in
the protection detection circuitry can also lead to a protection).
Service Modes, Error Codes and Fault Finding
Table 5-3 Error codes overview
ERROR DeviceError descriptionCheck itemDiagram
0Not applicableNo Error
1Not applicableX-Ray / over-voltage protection (US only)2411, 2412, 2413, 6404, 6411, 6412.A2
2Not applicableHigh beam (BCI) protection3404, 7405A2
3Not applicableVertical guard protection3466, 7451, 7452, 7453, 7454A2
4Tuner UA1316/AI2C error while communicating with 2nd tuner1000, 5010 (PIP Module)F2
5Not applicable+5v protection 7604, 7605A5
6I2C busGeneral I2C error7200, 3207, 3214A4
7Not applicable--8Not applicable--924C16I2C error while communicating with the EEPROM7601, 3604, 3605A5
10Tuner= I2C error while communicating with the PLL tuner1000, 5001A3
11TDA6107/ABlack current loop instability protection7330, 3351, CRTB1
12SDA9488XI2C error while communicating with the PIP processor7242 (PIP Module)F1
13Not applicable--14DVD LoaderI2C error while communicating with the DVD Interface moduleDVD Interface moduleDVD Loader
15TDA9178T/N1I2C error while communicating with LTI module7610H
16TDA9887I2C error while communicating with PIP_Demodulator7201F2
17Not applicable--18Not applicable--19TDA1200I2C error while communicating with SSD stereo sound decoder7200A4
20TDA1200I2C error while communicating with video cosmic in Hercules IC7200A4
Note: Errors 7, 8, 13, 17, 18 are not applicable.
5.6The Blinking LED Procedure
Using this procedure, you can make the contents of the error
buffer visible via the front LED. This is especially useful when
there is no picture.
When the SDM is entered, the LED will blink the contents of the
error-buffer:
•When all the error-codes are displayed, the sequence
finishes with an 'on' LED blink of 1.5 seconds,
•The sequence starts again.
Example of error buffer: 12 9 6 0 0
After entering SDM, the following occurs:
•1 long 'on' blink of 5 seconds to start the sequence,
•12 short blinks followed by a pause of 1.5 seconds,
•9 short blinks followed by a pause of 1.5 seconds,
•6 short blinks followed by a pause of 1.5 seconds,
•1 long 'on' blink of 1.5 seconds to finish the sequence,
•The sequence starts again at 12 short blinks.
Page 15
Service Modes, Error Codes and Fault Finding
EN 15L04A AA5.
5.7Protections
If a fault situation is detected, an error code will be generated;
and, if necessary, the television set will go into protection
mode. Blinking of the red LED at a frequency of 3 Hz indicates
the protection mode. In some error cases, the microprocessor
does not put the set in protection mode. The error codes of the
error buffer and the blinking LED procedure can be read via the
Service Default Menu (SDM), or via ComPair.
To get a quick diagnosis the chassis has three service modes
implemented:
•The Customer Service Mode (CSM).
•The Service Default Mode (SDM).
•The Service Alignment Mode (SAM).
For a detailed description, see the "Customer Service Mode,
Service Default mode" and "Service Alignment Mode" sections.
5.8Fault Finding and Repair Tips
Notes:
•It is assumed that the components are mounted correctly
with correct values and no bad solder joints.
•Before any fault finding actions, check if the correct options
are set.
5.8.1 NVM Editor
In some cases, it can be handy if one directly can change the
NVM contents. This can be done with the “NVM Editor” in SAM
mode. In the next table, the default NVM values are given.
Peak White Limit)
COR (Phase 1 time constant, Video Dependant
Coring, Ratio & White stretch)
60 Hz Vertical amplitude4240
YD & CL435A
RGB amplitude for full teletext mode468
NVM_TABLE_VERSION6016
OPTION_TABLE_VERSION617
CVI_BLOR6215
CVI_BLOG630F
TXT Brightness6417
V60 offset (60Hz Vertical Amplitude)66FE
FOAB, CHSE1393
SPR, WS1400
VMA, SVM14132
NVM_SOC_SMD1423
CCC_Preset_Gain_Red1431F
CCC_Preset_Gain_Green1441F
CCC_Preset_Gain_Blue1451F
NVM_FMWS1493
NVM_ASD_SC1_THR15010
NVM_CRYSTAL_ALIGN2083F
Last Brightness (VID PP others)26430
Last Color (VID PP others)26530
Last Contrast (VID PP others)266E4
Last Sharpness (VID PP others)26743
Last Hue (VID PP others)26832
Last Colour Temperature (VID PP others)2694
White-D Cool Red294FD
White-D Cool Blue2960
White-D Normal Red2971A
White-D Normal Green29820
White-D Normal Blue2991B
White-D Warm Red3002
White-D Warm Blue302FA
Last Volume34319
Last Balance34432
Last Treble (AUD PP others)34532
Last Bass (AUD PP others)34632
400A
410C
Page 16
EN 16L04A AA5.
Service Modes, Error Codes and Fault Finding
5.8.2 Power Supply
Set Not Working
Check Power
Supply Mains
Switch
Bridge Rectifier
circuit 6500
Ok
Check DC
voltage at
2505/2507
Ok
Check
fusible
resistor 3532
Not Ok
Check
7512
Not Ok
Check fusible
resistor 3510 &
circuit before it
Check IC7511 &
IC7531
Ok
Set able to
start-up
Ye s
No
Check other
fusible resistor
and capacitor in
the circuit
5.8.3 Deflection
One Thin Vertical Line
Quick check:
•Set in protection mode.
•LED blinking with error “3”.
One Thin Vertical Line
LED Blinking
Check all
connection and
peripheral at
Deflection Circuit in
place
Check
Line Transistor
7405
Is VBE between
200mV to 30mV & V
approximately 500mV
Yes
Check Horizontal
Deflection
Circuitry
CB
End
Figure 5-5 Fault finding tree “Set not working”
Set Does Not Start Up
Set Unable
to Start
Software
loaded?
Yes
Check
voltage
across 2552
No
Is Vbatt
approximately
140V
Yes
Check
voltage 2562
&2563
16V
Yes
Check 3V
across 2535
Yes
Check 6V
across 2535
Fuse Blown?
Load
Software
No
Yes
Check Power
Supply circuit
No
Change
Fuse
E_14480_057.eps
190204
Replace transistor
E_14480_059.eps
170204
Figure 5-7 Fault finding tree “One thin vertical line”
One Thin Horizontal Line
Quick check:
•Set in protection mode.
•LED blinking with error “2”.
One Horizontal
Thin Line
LED Blinking
Check all connection
and peripheral at
Deflection Circuit
in place
Check transistor
(7451, 7523, 7543) at
Vertical Deflection Circuitry
Replace transistor
Yes
Set able to
Start
Yes
End
No
Check Line
Transistor 7405
E_14480_058.eps
Figure 5-6 Fault finding tree “Set does not start up”
170204
Check Vertical
Deflection Circuit
E_14480_060.eps
170204
Figure 5-8 Fault finding tree “One thin horizontal line”
Page 17
Service Modes, Error Codes and Fault Finding
EN 17L04A AA5.
Blank Screen
Blank Screen
Check Vg2
(fine tune)
Not Ok
Check Beam Current Limit
(voltage is 1.8V-2V when
brightness and contrast is
set to the maximum
Ok
Check heater voltage
(measure pin 9&10
at the CRT socket)
Check video supply
(2457) is approximately
180V
5.8.5Tuner and IF
No Picture
1. Check that the Option settings are correct.
2. If correct, check that supply voltages are there.
3. If supply voltages are present, check whether picture is
Ok
Picture
appears?
present in AV.
4. If picture is present in AV, check with the scope the Tuner
IF output signal by manual storage to a known channel.
5. If IF output is present, Tuner is working fine. If no IF output,
Picture not appearing
I2C data lines may be open, check continuity of I2C lines.
If I2C lines are ok, Tuner may be defect, replaced Tuner.
6. If Tuner IF is present and yet still no picture in RF mode, go
to Video Processing troubleshooting section.
Not Ok
Check deflection
circuit
No Picture, No Sound
Yes
Check tuning
supply voltage,
pin 9 of tuner
>30V & <35V
Check supply
voltage, pin 7 of
tuner
5V
Yes
Check Tuner
pin 4 & 5
I2C Bus
Check
Supply
V
No
T
Section
Check Power
No
Supply
No Picture,
No Sound,
Raster Ok
Picture not appearing
Not Ok
Ok
Picture
appears?
Ok
End
Ok
E_14480_061.eps
170204
Check AGC
Voltage, pin 1
of tuner
AGC voltage
changes with
different signal
strength
No
Check AGC
circuit section
Figure 5-9 Fault finding tree “Blank screen”
5.8.4 Source Selection
Set is not able to go into AV or any missing AV is
encountered
E.g. AV1 is available but not able to enter to AV1: Check if the
option setting is correct.
Set is able to go to AV, but no audio is heard.
1. Check that continuity of signal is there from the SCART/
Cinch input to the input of the Hercules.
2. If continuity is there and still no audio, check that option
settings are correct.
3. If logic setting is correct and still no audio, proceed to Audio
Decoder/Processor troubleshooting section.
Set is able to go into AV but no video is available:
1. Check continuity from AV input to HERCULES depending
on the input.
2. If continuity is available and yet no video, proceed to Video
Processor troubleshooting section.
Ok
Yes
Replace Tuner
No
Check other
functional area
E_14480_062.eps
Figure 5-10 Fault finding tree “No picture, no sound”
170204
Page 18
EN 18L04A AA5.
Service Modes, Error Codes and Fault Finding
Picture Ok, No Sound
Picture Ok,
No Sound
Check IF output of
tuner, pin 11
CVBS
present?
Ye s
Check SAW filter output
(pin 4&5)
EU/AP/CH (QSS)- 1001
NA/LA/AP INT - 1002
Output Ok?
Ye s
Check other
functional area
No
No
Refer to fig.
"Power Supply:
Set not working"
Replace SAW
filter
E_14480_063.eps
170204
Figure 5-11 Fault finding tree “Picture ok, no sound”
Unable To Perform Tuning
Unable to
perform tuning
Enter SDM
check optionbyte 1
Correct
Check if tuner
Supply Voltage
pin 7
Incorrect
5V
Yes
Check Tuner
Supply Voltage
Check I2C at pin
4 & 5 and tuner
Ok
Check other
functional area
Enter SDM and change
to the appropriate byte
Check Power
No
Supply
No
33V
Yes
Not Ok
Check I2C
circuit
Not Ok
I2C
Not Ok
E_14480_064.eps
Replace
Tuner
Not Ok
Tuner
170204
5.8.6 Controller
Below are some guidelines for troubleshooting of the Micro
Controller function. Normally Micro Controller should be
checked when there is a problem of startup.
1. Check that both +3.3 V_dc and +1.8 V_dc are present.
2. Check that crystal oscillator is working.
3. Check that Power Good signal is at “high” logic, normal
operation.
4. Check that HERCULES is not in standby mode. Pin 15 of
HERCULES should be 0 V_dc.
5. Make sure H-drive pulse is there. This can be checked at
resistor R3239. If H-drive does not exist, remove resistor
R3239 to check if there is loading.
Note: When the set shuts down after a few second after power
“on”, the main cause is that Vg2 not aligned properly, try
adjusting Vg2 during the few seconds of power “on”.
5.8.7 Video Processing
No Picture
When “no picture in RF”, first check if the microprocessor is
functioning ok in section “Controller”. If that is ok, follow the
next steps.
When “no picture in AV”, first check if the video source
selection is functioning ok in section “Source Selection”. If that
is ok, follow the next steps.
1. Check that normal operating conditions are met.
2. Check that there is video signal at pin 81. If no video,
demodulator part of the HERCULES is faulty, replace with
new HERCULES.
3. If video signal is available at pin 81, check pin 56, 57, and
58 for the RGB signal.
4. If signal is not available, try checking the BRIGHTNESS
and/or CONTRAST control, and make sure it is not at zero.
5. If still with the correct settings and no video is available,
proceed to the CRT/RGB amplifier diagram.
For sets with TDA9178, follow steps below:
1. Put Option Byte 2 bit 4 to “0”; if video signal is not available,
then check fault finding section “Controller”, Section
“Source Selection”, and steps above.
2. If video is available but not correct, put Option Byte 2 bit 4
to “1”, then check if LTI panel is present. If not, put LTI
panel in the main chassis (connector 1221).
3. If LTI panel is in main chassis, check cable between LTI
panel and main chassis (position is 1206). If it is
connected, then the LTI panel is faulty, replace it.
For sets with Scavem, and Scavem does not work, follow steps
below:
1. Check Scavem coil connector (position is 1361) if
connected; if not, connect it.
2. If connected, check NVM “bit storage” byte 1 bit 7; if it is not
“1”, set it to “1”.
3. If it is “1”, then check the data of the NVM addresses as in
the next table. If the data is not correct, then set these
addresses to diagram values.
4. If it still not works, track Scavem output from pin64 of
HERCULES to CRT panel.
Table 5-5 NVM default values for Scavem
Figure 5-12 Fault finding tree “Unable to perform tuning”
•The Service Default Mode (SDM) and Service Alignment
Mode (SAM) are described in chapter 5 “Service Modes”
•Menu navigation is done with the CURSOR UP, DOWN,
LEFT, or RIGHT keys of the remote control transmitter.
8.1General Alignment Conditions
Perform all electrical adjustments under the following
conditions:
•AC voltage and frequency: 120 V_ac / 60 Hz or 240 V_ac /
50 Hz (region dependent).
•Connect the set to the Mains voltage via an isolation
transformer with a low internal resistance.
•Allow the set to warm up for approximately 20 minutes.
•Measure the voltages and waveforms in relation to chassis
ground (with the exception of the voltages on the primary
side of the power supply). Never use the cooling fins /
plates as ground.
•Test probe: Ri > 10 Mohm; Ci < 2.5 pF.
•Use an isolated trimmer / screwdriver to perform the
alignments.
8.2Hardware Alignments
6. CONTRAST to “0”.
7. BRIGHTNESS to minimum (OSD just visible).
8. Return to the SAM via the MENU key.
9. Connect the RF output of a pattern generator to the
antenna input. Test pattern is a 'black' picture (blank
screen on CRT without any OSD info) with a signal
strength of 1 V_pp.
10. Set the channel of the oscilloscope to 50 V/div and the time
base to 0.2 ms (external triggering on the vertical pulse).
Ground the scope at the CRT panel and connect a 10:1
probe to one of the cathodes of the picture tube socket (see
diagram B).
11. Measure the cut off pulse during first full line after the frame
blanking (see figure “V_cutoff waveform”). You will see two
pulses, one being the “cut off” pulse and the other being the
“white drive” pulse. Choose the one with the lowest value;
this is the “cut off” pulse.
12. Select the cathode with the highest V_dc value for the
alignment. Adjust the V_cutoff of this gun with the
SCREEN potentiometer (see figure “Top view family
board”) on the LOT to 160 V_dc, except for the 25/28BLD
picture tube (Black Line Display, for EU only); this tube
must be aligned to 140 V_dc.
13. Restore BRIGHTNESS and CONTRAST to normal (= 31).
max.
V
CUTOFF
[VDC]
D
1005
ComPair
7990
1000 (TUNER)
7601
1204
9252
SDM
9275
1221
0V Ref.
E_06532_011.eps
110204
Figure 8-2 V_cutoff waveform
1504
C
1506
8.2.2Focusing
1. Tune the set to a circle or crosshatch test pattern (use an
external video pattern generator).
2. Choose picture mode NATURAL (or MOVIES) with the
SMART PICTURE button on the remote control
transmitter.
3. Adjust the FOCUS potentiometer (see figure “Top view
family board”) until the vertical lines at 2/3 from east and
Focus
Screen
5512
B
LOT
VG2
E_14480_030.eps
130204
A
west, at the height of the centreline, are of minimum width
without visible haze.
Figure 8-1 Top view family board
8.2.1 Vg2 Adjustment
1. Activate the SAM.
2. Go to the WHITE TONE sub menu.
3. Set the values of NORMAL RED, GREEN and BLUE to
“32”.
4. Go, via the MENU key, to the normal user menu and set
Enter the Service Alignment Mode (see also chapter 5 “Service
Modes, ....”). The SAM menu will now appear on the screen.
Select one of the following alignments:
•Options
•Tuner
•White Tone
•Geometry
•Audio
8.3.1 Options
Options are used to control the presence/absence of certain
features and hardware.
How to change an Option Byte
An Option Byte represents a number of different options.
Changing these bytes directly, makes it possible to set all
options very fast. All options are controlled via seven option
bytes. Select the option byte (OP1.. OP7) with the MENU UP/
DOWN keys, and enter the new value.
Leaving the OPTION submenu saves the changes in the
Option Byte settings. Some changes will only take effect after
the set has been switched “off” and “on” with the AC power
switch (cold start).
How to calculate the value of an Option Byte
•Calculate an Option Byte value (OP1 .. OP7) in the
following way:
•Check the status of the single option bits (OB): are they
enabled (1) or disabled (0).
•When an option bit is enabled (1) it represents a certain
value (see column “Bit value” in table below). When an
option bit is disabled, its value is 0.
•The total value of an Option Byte (decimal) is formed by the
sum of its eight option bits. The factory values are printed
on a sticker on the CRT.
•OB12: UK PNP
– 0 : UK's default Plug and Play setting is not available or
not applicable.
– 1 : UK's default Plug and Play setting is available.
– When UK PNP and VIRGIN MODE are set to “1” at the
initial setup and after exiting from menu, VIRGIN
MODE will be set automatically to “0” while UK PNP
remains “1”.
•OB11: VIRGIN MODE
– 0 : Virgin mode is disabled or not applicable.
– 1 : Virgin mode is enabled. Plug and Play menu item
will be displayed to perform installation at the initial
startup of the TV when VIRGIN MODE is set to “1”.
After installation is finished, this option bit will be
automatically set to “0”.
•OB10: CHINA
– 0 : Tuning is not for China set, or this option bit is not
applicable.
– 1 : Tuning is for China set.
Option Byte 2 (OP2)
•OB27: SC
– 0 : Soft clipping is disabled.
– 1 : Soft clipping is enabled.
•OB26: GREEN UI
– 0 : Green UI is disabled (for Philips brand).
– 1 : Green UI is enabled (for Magnavox brand).
– Note: only for NAFTA region.
•OB25: CHANNEL NAMING
– 0 : Name FM Channel is disabled or not applicable.
– 1 : Name FM Channel is enabled.
– Note : Name FM channel can be enabled only when
•OB23: TILT
– 0 : Rotate Picture is disabled or not applicable.
– 1 : Rotate Picture is enabled.
•OB22: FINE TUNING
– 0 : Fine Tuning for Channel Offset is disabled or not
applicable.
– 1 : Fine Tuning for Channel Offset is enabled.
•OB21: PIP PHILIPS TUNER
– 0 : ALPS / MASCO compatible tuner is in use for PIP
module.
– 1 : Philips compatible tuner is in use for PIP module.
•OB20: HUE
– 0 : Hue/Tint Level is disabled or not applicable.
– 1 : Hue/Tint Level is enabled.
Option Byte 3 (OP3)
•OB37: EW FUNCTION
– 0 : EW function is disabled. In this case, only Expand
4:3 is allowed, Compress 16:9 is not applicable.
– 1 : EW function is enabled. In this case, both Expand
4:3 and Compress 16:9 are applicable.
•OB36: 2 TUNER PIP
– 0 : Software selection no PIP
– 1 : Software selection with PIP
– Note: Only for EU/AP region for sets with PIP.
•OB35: PIP SPLITTER
– 0 : Normal Tuner in PIP
– 1 : Splitter in PIP
– Note: Only for EU/AP region. For PIP sets and build in
with Splitter in PIP tuner.
•OB34: SPLITTER
– 0 : Normal Tuner for main chassis
– 1 : Splitter Tuner for main chassis
– Note: Only for EU/AP region.
•OB33: VIRTUAL DOLBY
– 0 : Virtual Dolby is not applicable.
– 1 : Virtual Dolby is applicable.
•OB32: WIDE SCREEN
– 0 : Software is used for 4:3 sets or not applicable.
– 1 : Software is used for 16:9 sets.
•OB31: WSSB (EU)
– 0 : WSSB is disabled or not applicable.
– 1 : WSSB is enabled.
– Note : This option bit can be set to “1” only when WIDE
SCREEN= “1”.
•OB30: ECO SUBWOOFER
– 0 : Feature is disabled or not applicable.
– 1 : Feature is enabled.
Option Byte 4 (OP4)
•OB47: Reserved
– Default setting is “0”.
•OB46: Reserved
– Default setting is “0”.
•OB45: ULTRA BASS
– 0 : Ultra Bass is disabled or not applicable.
– 1 : Ultra Bass is enabled.
– Default setting is “0”.
•OB44: DELTA VOLUME
– 0 : Delta Volume Level is disabled or not applicable.
– 1 : Delta Volume Level is enabled.
•OB43: Reserved
– Default setting is “0”.
•OB42: VOLUME LIMITER
– 0 : Volume Limiter Level is disabled or not applicable.
– 1 : Toggle Volume Limiter Level is enabled.
•OB41: Reserved
– Default setting is “0”.
•OB40: STEREO NICAM 2CS
– 0 : For AV Stereo.
– 1 : For NICAM Stereo 2CS.
Option Byte 5 (OP5)
•OB57: AV1
– 0 : AV1 source is not present.
– 1 : AV1 source is present.
•OB56: AV2
– 0 : AV2 source is not present.
– 1 : AV2 source is present.
– Note : For EU, when AV2=“1”, both EXT2 and SVHS2
should be included in the OSD loop.
•OB55: AV3
– 0 : Side/Front AV3 source is not present.
– 1 : Side/Front AV3 source is present.
•OB54: CVI
– 0 : CVI source is not available.
– 1 : CVI source is available.
•OB53: SVHS2
– 0 : SVHS2 source is not available.
– 1 : SVHS2 source is available.
– Note : This option bit is not applicable for EU.
•OB52: SVHS3
– 0 : SVHS3 source is not available.
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Alignments
EN 71L04A AA8.
– 1 : SVHS3 source is available.
– Note : This option bit is not applicable for EU.
•OB51: HOTEL MODE
– 0 : Hotel mode is disabled or not applicable.
– 1 : Hotel mode is enabled.
•OB50: Reserved
– Default setting is “0”.
Option Byte 6 (OP6)
•OB67: PERSONAL ZAPPING
– 0 : Personal Zapping feature is disabled or not
applicable.
– 1 : Personal Zapping feature is enabled.
•OB66: Reserved
– Default setting is “0”.
•OB65: FM TRAP
– 0 : FM Trap is not present.
– 1 : FM Trap is present.
– Note: Only for LATAM region.
•OB64: COMBFILTER
– 0 : 3D-combfilter is not present.
– 1 : 3D-combfilter is present.
•OB63: ACTIVE CONTROL
– 0 : Active Control feature is disabled or not applicable.
– 1 : Active Control feature is enabled.
•OB62: VIDEO TEXT
– 0 : Video Text (DW with TXT) is disabled or not
applicable.
– 1 : Video Text (DW with TXT) is enabled.
– Note: For EU only.
•OB61: LIGHT SENSOR
– 0 : Light sensor feature is disabled or not applicable.
– 1 : Light sensor feature is enabled.
•OB60: DUAL TEXT
– 0 : Dual Text and Text Dual Screen are disabled or not
applicable.
– 1: Dual Text and Text Dual Screen are enabled.
Option Byte 7 (OP7)
•OB77: TIME WIN1
– 00 : The time window is set to 1.2 s.
– 01 : The time window is set to 2 s.
– Note :The time-out for all digit entries depends on this
setting.
•OB76: Reserved
– Default setting is “0”.
•OB75: Reserved
– Default setting is “0”.
•OB74: Reserved
– Default setting is “0”.
•OB73: Reserved
– Default setting is “0”.
•OB72 Reserved
– Default setting is “0”.
•OB71 Reserved
– Default setting is “0”.
•OB70: Reserved
– Default setting is “0”.
2. Connect a DC multimeter to pin 1 of the tuner (item 1000
on the main panel).
3. Activate the SAM.
4. Go to the TUNER sub menu.
5. Select AGC with the UP/DOWN cursor keys.
6. Adjust the AGC-value with the LEFT/ RIGHT cursor keys
until the voltage at pin 1 of the tuner lies between 3.8 and
2.3 V (default value is “20”).
7. Switch the set to STANDBY, in order to store the
alignments.
CL (Cathode drive level)
Always set to “5”.
8.3.3White Tone
In the WHITE TONE sub menu, the values of the black cut off
level can be adjusted. Normally, no alignment is needed, and
you can use the given default values.
The colour temperature mode (NORMAL, COOL and WARM)
and the colour (R, G, and B) can be selected with the UP/
DOWN RIGHT/LEFT cursor keys. The value can be changed
with the LEFT/RIGHT cursor keys. First, select the values for
the NORMAL colour temperature. Then select the values for
the COOL and WARM mode. After alignment, switch the set to
STANDBY, in order to store the alignments.
Default settings:
•NORMAL:
– NORMAL R= “26”
– NORMAL G= “32”
– NORMAL B= “27”
Note: Described alignments are only necessary when the NVM
(item 7601) is replaced.
IF PLL
This adjustment is auto-aligned. Therefore, no action is
required.
AGC (AGC take over point)
1. Set the external pattern generator to a colour bar video
signal and connect the RF output to aerial input. Set
amplitude to 10 mV and set frequency to 61.25 MHz
(channel 3).
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EN 72L04A AA8.
Alignments
8.3.4 Geometry
The geometry alignments menu contains several items to align
the set, in order to obtain correct picture geometry.
•East West Trapezium (EWT). Align straight vertical lines
in the middle of the screen.
•H60 (Delta HSH for 60Hz, if present). Align straight
horizontal lines if NTSC system is used (60 Hz) i.s.o.
PAL (50 Hz). Default value is “9”.
Vertical
•Service blanking (SBL). Switch the blanking of the lower
half of the screen “on” or “off” (to be used in combination
with the vertical slope alignment).
•Vertical Shift (VSH). Align the vertical centring so that the
test pattern is located vertically in the middle. Repeat the
'vertical amplitude' alignment if necessary.
•Vertical slope (VS). Align the vertical centre of the picture
to the vertical centre of the CRT. This is the first of the
vertical alignments to perform. For an easy alignment, set
SBL to “on”.
•Vertical Amplitude (VAM). Align the vertical amplitude so
that the complete test pattern is visible.
•Vertical S-Correction (VSC). Align the vertical linearity,
meaning that vertical intervals of a grid pattern must be
equal over the entire screen height.
•Vertical Zoom (VX, if present). The vertical zoom is
added in for the purpose of development. It helps the
designer to set proper values for the movie expand or
movie (16x9) compress. Default value is “25”.
•V60 (Delta VAM for 60Hz, if present). Align straight
vertical lines if NTSC system (60 Hz) is used i.s.o.
PAL (50 Hz). Default value is “-2”.
In the next table, you will find the GEOMETRY default values
for the different sets.
10
11
12
E/W TRAPEZIUM
HOR. PARALLELOGRAM
HOR. BOW
E_06532_010.eps
110204
Figure 8-4 Geometry alignments
1. Connect an external video pattern generator to the aerial
input of the TV-set and input a crosshatch test pattern. Set
the generator amplitude to at least 1 mV and set frequency
to 61.25 MHz (channel 3).
2. Set 'Smart Picture' to NATURAL (or MOVIES).
3. Activate the SAM menu (see chapter 5 “Service Modes”).
4. Go to the GEOMETRY sub menu.
5. Choose HORIZONTAL or VERTICAL alignment.
Now the following alignments can be performed:
Horizontal
•Horizontal Parallelogram (HP). Align straight vertical
lines in the top and the bottom; vertical rotation around the
centre.
•Horizontal Bow (HB). Align straight horizontal lines in the
top and the bottom; horizontal rotation around the centre.
•Horizontal Shift (HSH). Align the horizontal centre of the
picture to the horizontal centre of the CRT.
•East West Width (EWW). Align the picture width until the
complete test pattern is visible.
•East West Parabola (EWP). Align straight vertical lines at
the sides of the screen.
•Upper Corner Parabola (UCP). Align straight vertical lines
in the upper corners of the screen.
No alignments are needed for the audio sub menu. Use the
given default values.
QSS (Quasi Split Sound)
•For NICAM/2CS sound system (EU/AP, except for
APNTSC), set to “On”.
•For AV-Stereo sound system (sets without NICAM), set to
“On”.
•For all other sets (NAFTA/LATAM/AP-NTSC), set to “Off”.
FMI (Freq. Modulation Intercarrier)
•For NICAM/2CS sound system (EU/AP, except for
APNTSC), set to “On”.
•For AV-Stereo sound system (sets without NICAM), set to
“Off”.
•For dBx/non-dBx sound systems, set to “On”.
NICAM Alignment
•For sets with NICAM/2CS (EU/AP, except for AP-NTSC)
sound system, set to “79”.
•For all other sets (NAFTA/LATAM/AP-NTSC), set to “63”
(= don’t care).
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Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 73L04A AA9.
9.Circuit Descriptions, List of Abbreviations, and IC Data Sheets
Index of this chapter:
1. Introduction
2. Power Supply
3. Deflection
4. Control
5. Tuner and IF
6. Source Selection
7. Video Processing
8. Audio Processing
9. Picture in Picture (PIP)
10. Abbreviations
11. IC Data Sheets
Notes:
•Only new (not recently published) circuits are described in
this chapter. For the other circuit descriptions, see the
L01.1/M8 Service Manual.
•The descriptions below are a copy from the L04U manual,
therefore sometimes a reference is made to region specific
terminology or chassis (like the M8). Only the PIP
description is new.
•Figures can deviate slightly from the actual situation, due
to different set executions.
•For a good understanding of the following circuit
descriptions, please use the diagrams in sections “Block
Diagrams, ...”, and/or “Electrical Diagrams”. Where
necessary, you will find a separate drawing for clarification.
9.1Introduction
The "L04" chassis is a global TV chassis for the model year
2004 and is used for TV sets with large screen sizes (from 21
to 36 inch), in Super Flat and Real Flat executions (both in 4:3
and 16:9 variants).
There are three types of CRT namely the 100 degrees, 110
degrees and Wide Screen CRT.
•The 100 deg. 4:3 CRT is raster-correction-free and does
not need East/West Correction (except when used in AP
regions), therefore the corrections needed are Horizontal
Shift, Vertical Slope, Vertical Amplitude, Vertical SCorrection, Vertical Shift, and Vertical Zoom for geometry
corrections.
•The 110 deg. 4:3 CRT comes with East/West Correction.
In addition to the parameter mentioned above, it also
needs the Horizontal Parallelogram, Horizontal Bow,
Horizontal Shift, East/West Width, East/West Parabola,
East/West Upper and Lower Corners, and East/West
Trapezium correction.
•The Wide Screen TV sets have all the correction of the
110 deg. 4:3 CRTs and also have additional picture format
like the 4:3 format, 16:9, 14:9, 16:9 zoom, subtitle zoom,
and the Super-Wide picture format.
In comparison to its predecessor (the L01.1/M8), this chassis is
has the following (new) features:
•Audio: The sound processor is part of the UOC processor
(called “Hercules”).
•Video: Enhanced video features, video drivers, and Active
Control.
•Power Supply: Adapted to supply the Hercules IC, and to
enable 0.5 W Standby power dissipation. Also provisions
are made for future extensions like DVD and iDTV.
The standard architecture consists of a Main panel (called
"family board"), a Picture Tube panel, a Side I/O panel, and a
Top Control panel. The Main panel consists primarily of
conventional components with some surface mounted devices
in the audio and video processing part.
The functions for video/audio processing, microprocessor (P),
and CC/Teletext (TXT) decoder are all combined in one IC
(TDA1200x, item 7200), the so-called third generation Ultimate
One Chip (UOC-III) or “Hercules”. This chip is mounted on the
“solder” side of the main panel, and has the following features:
•Control, small signal, mono/stereo, and extensive Audio/
Video switching in one IC.
•Upgrade with digital sound & video processing.
•Alignment free IF, including SECAM-L/L1 and AM.
•FM sound 4.5/5.5/6.0/6.5, no traps/bandpass filters.
•Full multi-standard color decoder.
•One Xtal reference for all functions (microprocessor, RCP,
TXT/CC, RDS, color decoder, and stereo sound
processor).
The tuning system features 181 channels with on-screen
display. The main tuning system uses a tuner, a
microcomputer, and a memory IC mounted on the main panel.
The microcomputer communicates with the memory IC, the
customer keyboard, remote receiver, tuner, signal processor IC
and the audio output IC via the I2C bus. The memory IC retains
the settings for favorite stations, customer-preferred settings,
and service / factory data.
The on-screen graphics and closed caption decoding are done
within the microprocessor where they are added to the main
signal.
The chassis uses a Switching Mode Power Supply (SMPS) for
the main voltage source. The chassis has a 'hot' ground
reference on the primary side and a cold ground reference on
the secondary side of the power supply and the rest of the
chassis.
9.2Power Supply
9.2.1Block Diagram
Vbatt (to deflection & DVD interface board)
FILTER &
SWITCH
Degaussing Supply (V_DG)
Derived from =Vaudio
MH COIL
RELAY
DEGAUSS
RECTIFIER
MAIN SMPS
AUX SMPS
Figure 9-1 Block diagram power supply
Stdby_con signal
The Hercules generates this signal. This line is logic “low” (0 V)
under normal operation and in semi-Standby of the TV, and is
“high” (3.3 V) during Standby.
Power_down signal
The AUX SMPS generates this signal. It is logic “high” (3 .3 V)
under normal operation of the TV and goes “low” (0 V) when the
AC power (or Mains) input voltage supply goes below 70 V_ac.
B (Hercules port)
This port is used to switch the AUX SMPS output V_aux “On/
Off”. This is required for DVD and iDTV (for future extensions).
Vaux (for IDTV)
B (connected to HERCULES port B to
switch ON/OFF Vaux)
E_14480_072.eps
120504
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EN 74L04A AA9.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
9.2.2 Timing Diagrams
Power ON - To Standby - Out of Standby - Power OFF
3, 3.3, 6V
POWER_DOWN
STDBY
+1V8 EXT.
Stdby_con
Vbat, Vaudio
STB bit
VT_supply
+5V
PIP Supplies
Relay status
Power ON
Normal
10mS
B
Closed
200ms100ms(ref)
2s(ref)
1s(ref)
To Standby
Standby mode
Open
Out of Standby
800ms
200ms
Normal
2s(ref)
Figure 9-2 Timing diagram Standby
Power ON - To Semi Standby - Out of Semi Standby Power OFF
Power ON
3, 3.3,6V
STDBY
+1V8 ext
Stdby_con
Vbat, Vaudio
STB bit
VT_supply
+5V
PIP Supplies
B
Relay status
Normal
10mS
Closed
200ms 20ms (ref) 10ms(ref)
1s(ref)
2s(ref)
To Semi Standby Out of Semi Standby
Semi Standby Normal
Open
800ms
Figure 9-3 Timing diagram Semi Standby
9.2.3 Startup Sequence
When the set is connected to the AC power, the rectified line
voltage (via winding 4-5 of L5531 connected to pin 14 of
IC7531) will start the internal voltage source to charge the V_cc
capacitor (C2532). The IC starts to switch as soon as the V_cc
reaches the V_cc start level of 9.5 V. This supply is
automatically taken over by winding 1-2, as soon as the V_cc
is high enough, and the internal supply source will stop (for high
efficiency switching).
Power off
20ms(ref)
Power OFF
Perform hard-reset
10ms(ref
10ms(ref)
E_14480_073.eps
under start_up
Perform
sequence for details.
Hard-reset
10ms(ref)
E_14480_074.eps
Table 9-1 Pinning overview TEA1523
Pin Symbol Description
2GndThis pin is Ground of the IC.
3V_ccThis pin is connected to the supply voltage. An internal current
charges the V_cc capacitor (2532), and the start-up sequence
is initiated when this voltage reaches a leve l of 9.5 V. Note: The
output power is disabled when the voltage gets below 9 V
(UVLO). Operating range is between 0 to 40 V.
5RCFrequency setting
6REGThis pin is connected to the feedback loop. The pin contains two
functions: 1) Between 1 to 1.425 V it controls the "on" time. 2)
Above the threshold of 3.5 V, it is possible to initiate "burst
mode" standby.
11Demag This pin is connected to the V_cc winding of 5531. It has three
functions: 1) During Magnetisation, the input voltage is sensed
to compensate OCP level for OPP. 2) During demagnetisation,
the output voltage is sensed for OVP and 3) A comparator is
used to prevent continuous conduction when output is
overloaded.
12Sense This pin contains three different functions.: 1) Dectection of soft
200204
14DrainThis pin is connected to the drain of the switch or center tap of
start, protection levels of 2) OCP, and 3) SWP.
the transformer. It contains three functions: 1) M-level (mains-
dependent operation-enabling level), 2) Supply for start-up
current, and 3) Valley detection.
As C2532 of IC7531 is charged, it will also start to charge the
V_cc capacitor (C2511) of IC7511. Via resistor R3519 and
C2511, the TEA1506 starts to switch as soon as the V_cc
voltage reaches the V_cc start level of is about 11 V. The V_cc
voltage is automatically taken over by the main transformer
L5512 (winding 2-3) when the V_cc is high enough (when this
voltage is even higher than the voltage on C2511, there is no
current flow from C2532 to C2511 due to diode D6512).
Table 9-2 Pinning overview TEA1506
Pin Symbol Description
2VccThis pin is connected to the supply voltage. When this voltage
200204
3GndThis pin is Ground of the IC.
6CtrlThis pin is connected to the feedback loop. The pin will control
7Demag This pin is connected to the Vcc winding of 5512. It contains
9Sense This pin contains three different functions: 1) dectection of soft
11DriverThis pin will drive the (MOSFET) switch.
12HVSThis is High Volt Spacer (n.a.)
14DrainConnected to the Drain of the external MOSFET switch, this is
is high (Vcc_start level, about 11 V), the IC will start switching.
When the voltage is lower than Vcc_uvlo (about 8.7 V), the IC
will stop switching.Note: This pin is not self supplied by internal
source like in TEA1507
the "on" time between 1 V to 1.5 V.
three functions: 1) During magnetisation, the input voltage is
sensed to compensate OCP level for OPP, 2) During
demagnetisation, the output voltage is sensed for OVP and 3)
a comparator is used to prevent continuous conduction when
the output is overloaded.
start, protection levels of 2) OCP, and 3) SWP.
the input for valley sensing and initial internal supply.
9.2.4 Standby Mode
In this mode, IC7511 (TEA1506) will be totally disabled. So
there is no voltage on the main transformer output. But IC7531
(TEA1523) will still work and will provide the necessary output
voltages (6V -> 5V, 3.3V, 3V -> 1.8V) to the Hercules (IC7200).
Table 9-3 PSU voltage overview
VoltageNormal operationStdby mode
V_batt130 - 143 V0 V
V_audio+/- 15.5 V0 V
+6V6 V6 V
+3V3 V3 V
Stdby_con0 V3.3 V
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Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 75L04A AA9.
9.3Deflection
9.3.1 Synchronization
Before the Hercules (IC7200) can generate horizontal drive
pulses, the +3.3V supply voltages must be present. After the
start up command of the microprocessor (via I2C), the
Hercules outputs the horizontal pulses. These horizontal
pulses begin “initially” with double line frequency and then
change “gradually” to line frequency in order to limit the current
in the line stage (slow-start).
The VDRA and VDRB signals are the balanced output currents
(sawtooth shaped) of the frame oscillator (pins 106 and 107 of
the Hercules). These output signals are balanced, so they are
less sensitive to disturbances.
There is a current source inside the UOC at pin 102. This
pumps energy in the capacitor connected to this pin producing
a pure saw tooth. The vertical drive signals and the E/W
correction signal are derived.
Pin 108 is the East-West drive (or AVL), and it is a single ended
current output. The correction for “horizontal width for changed
EHT” from this pin is available by setting the HCO bit to “1”.
The Phase-2 Compensation available at pin 113 gives frame
correction for high beam currents. The phase compensation
signal is used to correct the phase of the picture from the
horizontal drive signal.
Pin 63 is the SANDCASTLE output (contains all sync info) and
also HORIZONTAL FLYBACK (HFB) input.
Pin 97 is the EHT tracking/over-voltage protection pin. The
HCO bit can switch on the tracking on EW. If the voltage at pin
97 exceeds 3.9 V, the over-voltage protection will be activated
and the horizontal drive is switched “off” via a slow stop.
9.3.2 Horizontal Deflection
There are several executions (depending on the CRT):
•Sets with no East-West correction. The principle of the
horizontal deflection is based on the quasi-diode
modulation circuit. This horizontal deflection circuit
supplies the deflection current and auxiliary voltages from
the LOT.
•Sets with East-West correction. The principle of the
horizontal deflection is based on a diode modulator with
east-west correction. This horizontal deflection circuit
supplies the deflection current and auxiliary voltages from
the LOT.
•Sets with dynamic East-West correction. The principle
of the horizontal deflection is based on a diode modulator
with dynamic east-west correction for picture tubes with
inner pincushion. This horizontal deflection circuit supplies
the deflection current and auxiliary voltages from the LOT.
Basic Principle
During a scan period, either the Line Transistor or diode(s)
conduct to ensure a constant voltage over the deflection coil
(that results in a linear current). During the flyback period, the
Line Transistor stops conducting, and the flyback capacitor(s)
together with the inductance of the deflection coil creates
oscillation.
First Part of Scan
Pin 62 of the UOC delivers the horizontal drive signal for the
Line Output stage. This signal is a square pulse of line
frequency. L5402 is the flyback drive transformer. This
transformer de-couples the line output stage from the UOC. It
has a direct polarization. The flyback drive circuit works with
the start-up supply taken from +6V of the Aux supply (and
subsequently taking from VlotAux+9V). When the H-drive is
high, TS7404 conducts, and transformer L5402 starts to store
energy. The base of the line transistor TS7405 is low and
therefore blocks. The current in the deflection coil returns from
diode D6404.
Second Part of Scan
When the H-drive is low, TS7404 does not conduct, and the
energy that is stored in the transformer will transfer to the
secondary, making the base of the Line Transistor high. Then
the Line Transistor starts to conduct. The current in the
deflection coil returns from the transistor in another direction.
Flyback
At the moment the H-drive becomes high, the base of the Line
Transistor becomes low. Both the Line Transistor and the
Flyback Diode will block. There is an oscillation between the
flyback capacitor C2412 and the deflection coil. Because of the
inductance of the LOT, the Line Transistor cannot stop
conducting immediately. After the Line Transistor is out of
conduction, the flyback pulse is created. The flyback capacitor
charges until the current in the deflection coil reduce to zero.
Then it discharges through the deflection coil and the deflection
current increases from the other direction. The flyback diode
conducts and is back to the first part of the scan.
Linearity Correction
Because the deflection coil has a certain resistance, a picture
without any linearity issues cannot be expected. L5401 is the
linearity coil to compensate for this resistance. It is a coil with a
pre-magnetized core. This correction is called linearity
correction.
Horizontal S-Correction
Because the electronic beam needs to travel a longer distance
to both sides of the screen than the center, the middle of the
screen would become narrower than both sides. To prevent
this, a parabolic voltage is applied across the deflection coil
during scan. To create this parabolic voltage, a capacitor called
S-cap (C2417/C2418) is used as a voltage source during scan.
The sawtooth current of the deflection through this capacitor
creates the required parabolic voltage. This correction is called
S-Correction.
Mannheim-Circuit
When the EHT is heavily loaded with a bright line, the flyback
time can be increased a bit in this situation. As a result, the
scan delays a bit causing a DC-shift to the right in the next line,
which would create a small spike on the S-cap. This spike
oscillates with the inductance of the deflection coil and the
primary of LOT. The result is visible in vertical lines under
horizontal white line. This is called the Mannheim-effect.
To prevent this from happening, a circuit called Mannheimcircuit is added. This consists of C2415, R3404, R3417 and
D6406. During the scan, C2415 is charged via R3417. During
the flyback, the S-correction parabola across the S-Cap
C2417/C2418 is in its most negative, and D6406 conducts.
Thus, C2415 is switched in parallel to C2417/C2418 during
flyback. As C2415 is much larger than C2417/C2418, the
voltage across C2415 reduces the Mannheim-effect oscillation.
Class D East-West Driver
To reduce the power loss of the normal used linear East-West
amplifier, a class-D East-West circuit is used. To achieve this,
the East-West parabola waveform EW_DRIVE from the
Hercules (frame frequency) is sampled with a saw tooth (line
frequency) taken from the line aux output. Then a series of
width-modulated pulses is formed via two inverted phase
amplifiers, filtered by an inductor, which then directly drive the
diode modulated line circuit.
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EN 76L04A AA9.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
East-West Correction
To achieve a good geometry, dynamic S-correction is needed.
The design is such that the tube/yoke needs East-West
correction. Besides that, an inner pincushion is present after
East-West correction. The line deflection is modulated with a
parabolic voltage (frame frequency). In this way it is not so
much at top and bottom, and much more in the middle.
Upon entering the picture geometry menu in the SAM mode,
the following corrections will be displayed.
•EWW: East West Width.
•EWP: East West Parabola.
•UCP: Upper Corner Parabola.
•LCP: Lower Corner Parabola.
•EWT: East West Trapezium.
The East-West drive circuit realizes them all. The settings can
be changed by a remote control. All changed data will be
stored into the NVM after the geometry alignment.
Panorama
For Wide Screen sets, the S-correction of the picture has to
adapt between the different picture modes. In particular,
between 16:9 Wide Screen and 4:3 picture modes. This is
achieved with the (separate) Panorama circuit (see diagram
“G”). A signal (I2SDI1) from the UOC controls the state of
TS7463. When in the normal 16:9 Wide Screen mode, the
signal is “low” and therefore TS7463 is switched “off”.
When the 4:3 mode is selected, this signal from the UOC is
pulled “high”, switching TS7463 “on”. The relay 1463 on the
Panorama panel is subsequently turned “on” and, in effect,
paralleling capacitor C2475/C2474 to the S-Cap C2469/
C2470. This changes the overall effective S-correction. The
relay is switched “on” in 4:3 and Superwide picture modes.
9.3.3 Auxiliary Voltages
The horizontal deflection provides various auxiliary voltages
derived either directly or indirectly from the secondary pins of
the LOT:
•+9V: This supplies the Hercules’s flyback driver.
•+11V: This supplies the frame amplifier.
•-12V: This supplies the frame amplifier.
•50V: This supplies the frame amplifier.
•Filament: This supplies the heater pins of the picture tube.
•VideoSupply (+200V from primary side of LOT): This
supplies the RGB amplifier and Scavem circuit at the CRT
panel.
Notes:
•The V_T voltage (to tuner) is drawn from V_batt.
•The EHT voltage is generated by the Line Output
Transformer (LOT). The Focus and Vg2 voltages are
created with two potentiometers integrated in the
transformer.
9.3.4 Beam Current
The beam current is adjusted with R3451 and R3452. The
components R3473, R3453 and C2451 determine the
EHT_info characteristic. The voltage across C2412 varies
when the beam current changes. This EHT_info is used to
compensate the picture geometry via pin 97 of the Hercules
when the picture changes rapidly, and compensate the phase
2 loop via pin 113 of the Hercules. Also from the EHT_info line,
a BCL signal is derived and sent to the Hercules for controlling
the picture’s contrast and brightness.
When the picture content becomes brighter, it will introduce:
•Geometry distortion due to the impedance of the LOT
causing the EHT to drop.
•Picture blooming due to the picture characteristics
Because of the above mentioned, we will need a circuit for
Beam Current Limiter (BCL) and EHT compensation
(EHT_info). These two circuits derive the signal from the
picture tube current info through LOT pin 10.
BCL
•When the BCL pin voltage goes to 2.8 V, the Hercules will
start to limit CONTRAST gain.
•When it reaches 1.7 V, then the BRIGHTNESS gain limit
will start to react.
•When BCL pin voltage goes to 0.8 V, the RGB will be
blanked.
Components TS7483, R3490, R3491, R3492, and C2483 are
for fast beam current limiting (e.g. with a Black-to-White
pattern).
Components R3454, D6451, D6450, C2453, R3493, and
C2230 are for average beam current limiting. C2453 and
R3493 also control the timing where average beam current
limiting is more active or less active.
EHT_info
The “PHI2 correction” is to correct the storage time deviation of
the Line Output Transistor, which is causing geometry
distortion due to brightness change.
Line EHT_info is to correct the geometry distortion due to EHT
deviation.
Both of them feedback through the EHTO and PH2LF pin, and
correct the geometry through the East-West circuit.
Power Down
The power down connection is for EHT discharge during AC
Power “Off” state. In the Hercules, if EHT_info > 3.9 V, it will
trigger the X-ray protection circuit via a 2fH soft stop sequence.
The Hercules bits OSO (Switch Off in Vertical Over scan) and
FBC (Fixed Beam Current Switch Off) will discharge the EHT
with 1mA cathode current at over-scan position.
During switch-off, the H_out frequency is doubled immediately
and the duty cycle is set to 25% fixed, during 43 ms. The RGB
outputs are driven “high” to get a controlled discharge of the
picture tube with 1 mA during 38 ms. This will decrease the
EHT to about half the nominal value (= safety requirement).
When bit OSO is set, the white spot/flash during switch-off will
be written in overscan and thus will not be visible on the screen.
Careful application must guarantee that the vertical deflection
stays operational until the end of the discharge period.
9.3.5 DAF
The Dynamic Astigmatic Focus (DAF) circuit is required by
34RF sets only. It provides vertical DAF and horizontal DAF.
Both of the parabola signals are derived through integration by
using chassis available signals:
•The vertical parabola is using RC integration (via R3403
and C2401) on the Frame sensing resistor saw tooth
(Frame_FB).
•The horizontal parabola is obtained by 2 RC integration
(R3409, R3410, C2402, C2403) on the +9V LOT output.
Both of the parabolas are added on the output stage through
adder TS7402 and TS7403. The collector of TS7402 emitterdrives TS7401 and is amplified by pull up resistor R3411.
D6401 and C2405 provide the rectified supply voltage.
9.3.6 X-ray Protection
The X-ray protection circuit rectifies the filament voltage and
uses it to trigger TS7481 when the EHT is too high. TS7481 is
biased at “off” condition by D6480, R3482, and R3483 during
normal operation. When the EHT goes too high, the voltage
across R3482 will tend to increase as well, while the voltage
across D6481 is fixed. Up to certain level (triggering point),
TS7481 will be “on” and will force the EHT_info > 3.9 V. The
chassis will be shut down through a soft stop sequence.
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Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 77L04A AA9.
9.3.7 Vertical Deflection
The Frame stage consists fully of discrete components. This
has the advantage for better flash behavior than when an IC
was used.
The Frame differential drive signal from the Hercules comes
from a current source. Resistors R3460 and R3461 convert
them into a voltage, and feed them into the differential amplifier
TS7455 and TS7456. The output of TS7456 is input to the next
amplification stage of TS7452. Finally, TS7451 and TS7453
deliver the Vertical yoke current to the coil and feedback
through the sensing resistors R3471 and R3472.
D6458 and TS7454 are used to bias TS7451 and TS7453, to
get rid of zero crossovers, which can cause horizontal lines at
the screen center.
The negative supply is from -12V and the positive scanning
supply is from +12V through D6459. The flyback supply is
derived from D6455, D6456 and C2456. This circuit is a voltage
doubler, which stores energy in C2456 during the Line flyback
period and delivers the energy to C2465 during the Line
scanning period. Throughout the Frame period, the charging
and discharging of C2456 works alternatively. However, at the
first half of the Frame scanning, TS7451 is “on” and consumes
all the charge from C2456. When entering 2nd half Frame
period, TS7451 is “off”, so C2456 will gradually charge up to the
required flyback supply.
C2463, R3464 and D6457 are for boosting the base voltage of
TS7451 during the flyback period and the 1st half Frame period
as well. C2463 is charged by D6457 during the 2nd half
scanning. R3467 and R3468 are for oscillation damping.
The V_guard protection is to protect the Frame stage if a fault
condition happens. The V_guard will sense the pulse with
voltage > 3.8 V and period < 900 us. Any signal out of this
range will be considered as fault, and the chassis will be shut
down.
9.3.8 Tilt and Rotation
The rotation control signal is a PWM output from the UOC. It is
filtered by R3252, R3246, R3259 and C2259. The DC voltage
after filtering at C2259 will be amplified by R3245 (Main Board)
and R3390 (CRT panel).
The output stage functions similarly as in L01.1/M8 with
rotation IC TDA8941P. TS7331/TS7382 and TS7332/TS7381
will function alternatively corresponding to the rotation setting.
9.3.9 CRT panel
density transition is processed in a similar way and is also
sharpened.
In this chassis the SCAVEM signal is different from its
predecessor because the Hercules generates the differential
SCAVEM signal inside the IC.
The supply of the SCAVEM is taken from V_bat through a 1k5
/ 5 W resistor. Compared with the L01.1/M8, this has the
advantage of getting better performance for the pattern with
tremendous SCAVEM current (like V_sweep). In this former
chassis, because the supply was taken from the 200 V through
a 8k2 / 5 W resistor, the supply dropped significantly during a
large SCAVEM current. In this chassis, the drop due to the
pattern will be less because of the lower supply voltage
impedance.
In the Main Board, 1st stage amplification is taken care by 7208
with the pull up resistors (3361, 3387) located in the CRT panel.
TS7361 and TS7362 is the current buffer delivering the current
to the output stage. The diode D6361 is to lightly bias these
transistors, to get rid of the zero crossover of the stage.
After that, the signal is ac-coupled to TS7363 and TS7364
where the emitter resistors (R3364 and R3370) will determine
the final SCAVEM current. TS7363 and TS7364 are biased by
R3363, R3366, R3367 and R3368.
C2387, R3388, R3389, R3365, R3369, C2384, and C2385 are
used for suppressing unwanted oscillations.
The function of TS7376 is to limit the SCAVEM current from
going too high. It basically senses the voltage after R3373 and
clamps the SCAVEM signal through D6367 and C2376.
9.4Control
The Micro Controller is integrated with the Video Processor,
and is called the Hercules. For dynamic data storage, such as
SMART PICTURE and SMART SOUND settings, an external
NVM IC is being used.
Another feature includes an optional Teletext/Closed Caption
decoder with the possibility of different page storage depending
on the Hercules type number.
The Micro Controller ranges in ROM from 128 kB with no TXTdecoder to 128 kB with a 10 page Teletext or with Closed
Caption.
9.4.1Block Diagram
The block diagram of the Micro Controller application is shown
below.
The RGB amplifier stage is exactly the same as in L01.1/M8.
However, the RGB amplifier IC has been changed to
TDA6107AJF or TDA6108AJF. The “A” indication is with gain
of “80” rather than “50” in L01.1/M8. The diode D6332 used in
the former chassis, to solve the bright screen during start up, is
not required because this IC has the error correction
implemented.
Scavem
In certain versions, the Scavem feature is used to enhance the
sharpness of the picture. The RGB signals are first
differentiated and subsequently amplified before feeding to an
auxiliary coil known as the SVM coil. The current, flowing
through the SVM coil during the picture intensity transients,
modulates the deflection field and thus the scan velocity.
During the first half of the intensity increase, the scan velocity
is increased (thus decreasing the current density by spreading
it on a wider area). During the second half of the intensity
increase, the scan velocity is decreased (increasing the current
density by concentrating it on a smaller area). The increasing
current density transition is sharpened. A decreasing current
#!$$%
KEYBOARD/
PROTECTION
CIRCUIT
VOLUME/MUTE/TREBBLE /BASS/PANORAMA
STBY_CON
POWER GOOD
KEYBOARD/PROTECTION
INPUT
OUTPUT
LIGHT SENSOR
LED
IR
" !
Figure 9-4 Micro Controller block diagram
9.4.2Basic Specification
The Micro Controller operates at the following supply voltages:
•+3.3 V_dc at pins 33, 125, and 19.
•+1.8 V_dc at pins 126, 36, and 33.
•I2C pull up supply: +3.3V_dc.
WRITE
PROTECT
E_14480_070.eps
120504
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EN 78L04A AA9.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
9.4.3 Pin Configuration and Functionality
The ports of the Micro Controller can be configured as follows:
•A normal input port.
•An input ADC port.
•An output Open Drain port.
•An output Push-Pull port.
•An output PWM port.
•Input/Output Port
The following table shows the ports used for the L04 control:
The description of each functional pin is explained below:
•LED. This signal is used as an indication for the Standby,
Remote and Error Indicator. Region diversity:
– During protection mode, the LED blinks and the set is
in standby mode.
– During error conditions it blinks at a predefined rate.
– After receiving a valid RC-5 or local keyboard
command it flashes once.
– For sets with error message indication, the LED blinks
when message is active and the set is in standby
mode.
– 1: PAL B/G, DK, I, L
•Write Protect. The global protection line is used to enable
and disable write protection to the NVM. When write to the
NVM is required, pin 7 of the NVM must be pulled to logic
‘0’ first (via Write_Protect of the micro-controller pin) before
a write is performed. Otherwise pin 7 of NVM must always
be at logic “1”
– 0: Disabled
– 1: Enabled (default)
•Mute. This pin is use to MUTE the audio amplifier. It is
configured as push pull.
•Rotation. This pin is configured as PWM for the Rotation
feature. The output of the PWM is proportional to the
feature control.
•Light Sensor. This pin is configured as ADC input for the
Light Sensor.
•Sel_SC2_Interface. This pin is use to switch between the
SC2_CVBS_OUT and the INTF_CVBS_OUT for the
SCART_2_CVBS_OUT/ MONITOR_OUT signal.
•PWRDOWN. The AUX SMPS generates this signal. Logic
“high” (3.3 V) under normal operation of the TV and goes
“low” (0 V) when the Mains input voltage supply goes below
70 V_ac.
•Keyboard. Following are the Keyboard functions and the
step values (8 bit) for it.
Table 9-6 Local keyboard values
FunctionVoltage (V_dc) Step values (8 bit)
NAFTA Standby00 - 6
Ch +0.437 - 33
Exit Factory (Ch- and Vol-)0.6934 - 53
Ch -0.9354 - 73
Menu (Vol - and Vol +)1.1974 - 96
Vol -1.4997 - 121
DVD Eject1.8122 - 147
Vol +2.12148 - 169
•SDM. This pin is configured as Open Drain during the cold
start only. If this pin is shorted to ground during cold start,
it will enter the SDM mode (for Service use).
•ISP. This pin is configured as Open Drain during the cold
start only. If this pin is shorted to ground during cold start,
it will enter the ISP mode (for Service use).
•PANEL. This pin is configured as Open Drain during the
cold start only. If this pin is shorted to ground during that,
then it will enter to the PANEL mode.
•ResetEnabled. This is an output pin to switch the control
transistor (pos. TS7202) “high” or “low” for the reset of 1.8
V in case there is a corruption in the Hercules.
Table 9-5 LED signal diversity
LEDEuropeAP/ LATAMNAFTA
0 LED brighter Standby LED lighted Standby LED lighted Normal
1 LED dimmerNormalLED "off" NormalLED "off" Standby
•SCL. This is the clock wire of the two-wire single master bi-
directional I2C bus.
•SDA. This is the data wire of the two-wire single master bi-
directional I2C bus.
•STDBY_CON. The Hercules generates this signal. This
can enable the MAIN SMPS in normal operation and
disable it during Standby. It is of logic “low” (0 V) under
normal operation and “high” (3.3 V) during Standby.
•IR. This input pin is connected to an RC5 remote control
receiver.
•SEL-IF-LL’/ M-TRAP. For AP: All L04 AP sets are Multi
System QSS set. This is an output pin to switch the Video
SAW filter between M system and other systems.
– 0: NTSC M (default)
9.5Tuner and IF
The tuner used in this chassis comes from two sources, from
Philips and from Alps. Both tuner sources have the same pin
configuration so they are 1 to 1 compatible except for the
software, which will be selected by means of Option Settings.
Some features:
•Multi-Standard alignment free PLL-IF, including SECAM L/
L’.
•QSS versions with digital Second-Sound-IF SSIF (AM
demodulator for free).
•FM mono operation possible: Inter-Carrier or QSS.
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Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 79L04A AA9.
9.5.1 Diversity
The following Tuners can be present (depending on the region
and the set execution):
•Normal tuner without PIP.
•FM radio tuner without PIP.
•Normal tuner with PIP (main tuner with splitter).
•FM radio set with PIP (PIP tuner with splitter).
The SAW filter used, depends on the application concept
(whether it is a QSS concept or an Intercarrier):
•OFWM3953M for QSS Video.
•OFWK9656M for QSS Audio.
•OFWM1971M for Intercarrier.
9.5.2 Pin Assignments and Functionality
Pin assignment of the Tuner:
Table 9-7 Pinning Tuner
Pin Pin DescriptionDC Voltages
1 RF-AGC4V for Maximum Gain < 4V for Strong Signal
2 FM Radio Input or N.C3 NC (Address Pin)4 SCL0 to 3.3 V_dc
5 SDA0 to 3.3 V_dc
6/7 Supply Voltage5 V_dc +/- 0.25 V
8 N.C-
9 Tuning Supply Voltage30 to 35 V_dc
10 FM Radio IF Output/Ground 11 TV IF Output-
Condition
Pin assignment of the several SAW filters (depends on region/
execution):
Table 9-8 Pinning SAW filters
– Bit 4: OP_ATS
– Bit 3: OP_ACI
– Bit 2: OP_UK_PNP
– Bit 1: OP_VIRGIN_MODE
– Bit 0: OP_CHINA
For more details on the option settings, please refer to the
chapter 8 “Alignments”.
9.6Source Select
For this chassis, the audio/video source selection is controlled
via the Hercules.
The Audio/Video Source Select is one of the more complex
functions due to its diversity and complex switching. The Audio/
Video Source Select comprises of the following components:
•The Hercules itself for Mono Audio and Video Source
Selection.
•The HEF switch for Stereo Audio as well as Video
Selection.
9.6.1Options
The option settings for the Source Selection can be found in
Option settings of the SAM mode. The Option settings for
Option 5 are as follows:
•Option Byte 5
– Bit 7: AV1
– Bit 6: AV2
– Bit 5: AV3
– Bit 4: CVI
– Bit 3: SVHS2
– Bit 2: SVHS3
– Bit 1: HOTEL MODE
– Bit 0:
For more detail on the option settings, please refer to the
chapter 8 “Alignments”.
The table below shows the switching behavior of SAW filter.
Table 9-9 Switching behavior SAW filter
Condition
HighLow
SystemMBG/DK/I/L
Note: The logic level is measured at the base of transistor
7001.
9.5.3 Option Settings
The option settings for the Tuner type can be found in Option
setting 1 of the SAM mode. The Option settings for Option 1 are
as follows:
•Option Byte 1
– Bit 7: OP_PHILIPS_TUNER
– Bit 6: OP_FM_RADIO
– Bit 5: OP_LNA
9.6.2Diversity
The basic diversity of the Audio/Video Source Select is
between the Mono and the Stereo sets and the number of
Cinch/SCART’s as specified in the product specification. The
table below shows the Audio/Video Source Select diversity for
all regions:
Table 9-10 AV Source Select diversity
Pin SymbolRemark
51 R/Pr IN3AV1 (CVI)
50 G/Y IN3
49 B/Pb IN3
52 INSSW3
74 CVBS2/Y2
95 AUDIO IN5 L
94 AUDIO IN5 R
73 AUDIO IN3 LAV2 (SVHS)
72 AUDIO IN3 R
71 CVBS3/Y3
70 C2/C3
80 AUDIO IN4 LSide (SHVS)
79 AUDIO IN4 R
78 CVBS4/Y4
77 C4
81 IFVO/SVO/CVBSIMonitor Out
67 AUD OUT HP L
66 AUD OUT HP R
69 AUD OUT LS L (AUD OUT/AM OUT)HP/ LS Out
68 AUD OUT LS R
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EN 80L04A AA9.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
Pin SymbolRemark
59 V IN (R/Pr IN2/CX)Interface
58 U IN (B/Pb IN2)
57 Y IN (G/Y IN2/CVBS-Yx)
54 U OUT (INSSW2)
76 AUDIO IN2 L
75 AUDIO IN2 R
86 DVBO/IFVO/FMRON.C.
65 CVBSO/PIPPIP application
56 Y SYNC100 nF
55 Y OUT100 nF
53 V OUT (SWO)N.C.
93 AUD OUT S LN.C.
92 AUD OUT S RN.C.
Table 9-11 SCART Source Select diversity
Pin SymbolRemark
51 R/Pr IN3SCART 1
50 G/Y IN3
49 B/Pb IN3
52 INSSW3
74 CVBS2/Y2
86 DVBO/IFVO/FMRO
95 AUDIO IN5 L
94 AUDIO IN5 R
93 AUD OUT S L
92 AUD OUT S R
71 CVBS3/Y3SCART 2
70 C2/C3
81 IFVO/SVO/CVBSI
73 AUDIO IN3 L
72 AUDIO IN3 R
67 AUD OUT HP L
66 AUD OUT HP R
80 AUDIO IN4 LSide I/O
79 AUDIO IN4 R
78 CVBS4/Y4
77 C4
69 AUD OUT LS L (AUD OUT/AM OUT)LS/ HP/ MON OUT
68 AUD OUT LS R
59 V IN (R/Pr IN2/CX)Interface
58 U IN (B/Pb IN2)
57 Y IN (G/Y IN2/CVBS-Yx)
54 U OUT(INSSW2)
76 AUDIO IN2 L
75 AUDIO IN2 R
65 CVBSO/PIPfor PIP
56 YSYNC100 nF
55 YOUT100 nF
53 VOUT(SWO)N.C.
9.6.4 Video Source Selection
Video source selection is done inside the Hercules. Therefore
it provides a video switch with 3 external CVBS inputs and a
CVBS output. All CVBS inputs can be used as Y-input for Y/C
signals. However, only 2 Y/C sources can be selected because
the circuit has 2 chroma inputs.
All input signals are converted to YUV, and looped through an
external interface. This to enable picture improvement features
(like LTI/CTI) or PIP.
9.7Video Processing
The Video Processor is basically the Hercules and the
TDA9178 (CTI/LTI). Video processing is done in these two
chips such as the Brightness Control, Contrast Control and so
on.
Some features:
•Full YUV-loop interface (alternative functions: DVD, RGB
or Y/C).
•Internal OSD insertion (not Saturation or Contrast
controlled).
•Double window implementation.
•Linear / non linear scaling for 16:9 sets.
•Tint (hue) on UV signals (including DVD).
•Peaking, Coring, Black \ Blue \ White-stretch.
•Transfer-Ratio and Scavem (also on TXT).
9.7.1 Features
The features included in the Hercules are as follows:
•Brightness Control.
•Contrast Control.
•Saturation Control.
•Sharpness Control.
•Peak White Limiter.
•Beam Current Limiter.
•Black Stretch (Contrast Plus).
For sets with the TDA9178, there are two extra features:
•Luminance Transient Improvement (LTI).
•Color Transient Improvement (CTI).
9.7.2 Block Diagram
Following diagram is the block diagram of the video processing
part:
NVM
9.6.3 Audio Source Selection
The signals coming out of the DEMDEC (internal demodulator/
decoder block of the Hercules) are selectable and consist of
the following (depending on the transmission):
•DEC L/R (Can be NICAM, FM 2CS, or BTSC Stereo).
•Mono (Refers to fallback/forced Mono in Stereo
Transmission).
•SAP.
For L04, the assigned I/O with respect to the Hercules is as
follows:
•SCART1 or AV1 Input assigned to Audio In 5.
•SCART2 or AV2 Input assigned to Audio In 3.
•Side AV Input assigned to Audio In 4.
•External Interface Input assigned to Audio In 2.
•SCART1 Output assigned to SCART Output.
•SCART2 Output (EU) or Monitor Output (LA/NA/AP)
assigned to Headphone Output.
•Constant Level Output assigned to Loudspeaker Output.
68,69
2021
MONITOR
OUT
AUDIO
AMP
TUNER
VIDEO
SAW
AUDIO
SAW
2425
29,30
95,94,80,79,
78,77,76,75,
74,73,72,71,70
CVBS/AUDIO
REAR/SIDE
INPUT/OUTPUT
HERCULES
67,66
Figure 9-5 Video processing block diagram
42,4344
CRT
49,50,51
RGB/CVI
INPUT
53,54,55
57,5859
6586,81,
LTI/CTI
SW
PIP/
DVD
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EN 81L04A AA9.
9.7.3 LTI/CTI
The TDA9178 is an I2C-bus controlled IC (INCREDIBLE chip)
with YUV interface. This IC can do mainly histogram
processing, color transient improvement (CTI) and line
transient improvement (LTI).
•Luminance Vector Processing involves histogram function,
which provides scene dependent contrast improvement,
adaptive black and white point stretching.
•Color Vector Processing involves skin tone correction,
green enhancement and blue stretch.
•Spectral Processor involves step improvement processing,
contour processing, smart sharpness control, color
dependant sharpness and Color Transient Improvement.
•Noise detector, feature mode detector and cue flash
functions.
•Demonstration mode shows all the improvement features
in one picture.
Table 9-12 Pinning overview TDA9178
Pin SymbolDescription
1SCSandcastle input pin
2n.c.Not connected pin
3ADEXT1 External AD-conversion #1 input pin
4ADEXT2 External AD-conversion #2 input pin
5ADEXT3 External AD-conversion #3 input pin
6Y inLuminance input pin
7ADRAddress selection input pin
8U in-(B-Y) signal input pin
9V in-(R-Y) signal input pin
10 TPTestpin, connected to ground
11 SCLI2C-bus: clock input pin
12 n.c.Not connected pin
13 n.c.Not connected pin
14 SDAI2C-bus: data input pin
15 DECDIG Decoupling digital supply
16 V out-(R-Y) signal output pin
17 U out-(B-Y) signal output pin
18 V eeGround pin
19 Y outLuminance output pin
20 V ccSupply-voltage pin
21 S outLuminance output for SCAVEM
22 CFCue-flash output pin
23 n.c.Not connected pin
24 n.c.Not connected pin
9.7.4 Options
The option settings allow for process of the video as per set
specification. The option settings can be found in “Option 2”
and “Option 6” in the SAM mode. The option settings are as
follows:
•Option Byte 2
– Bit 7:
– Bit 6 :OP_GREEN_UI
– Bit 5: OP_CHANNEL_NAMING,
– Bit 4: OP_LTI,
– Bit 3: OP_TILT,
– Bit 2: OP_FINE_TUNING
– Bit 1: OP_PIP_PHILIPS_TUNER,
– Bit 0: OP_HUE,
•Option Byte 6
– Bit 7: OP_PERSONAL_ZAPPING,
– Bit 6:
– Bit 5: OP_FMTRAP
– Bit 4: OP_COMBFILTER
– Bit 3: OP_ACTIVE_CONTROL
– Bit 2: OP_VIDEO_TEXT
– Bit 1 :OP_LIGHT_SENSOR,
– Bit 0: OP_DUAL_TEXT
For more details on the option settings, please refer to the
chapter 8 “Alignments”.
9.8Audio Processing
The audio decoding is done entirely via the Hercules. The IF
output from the Tuner is fed directly to either the Video-IF or the
Sound-IF input depending on the type of concept chosen.
There are mainly two types of decoder in the Hercules, an
analog decoder that decodes only Mono, regardless of any
standards, and a digital decoder (or DEMDEC) that can decode
both Mono as well as Stereo, again regardless of any
standards.
In this chassis, the analog decoder is used in two cases:
•It is used for AM Sound demodulation in the Europe
SECAM LL’ transmission.
•It is used for all FM demodulation in AP AV-Stereo sets.
9.8.1Diversity
The diversity for the Audio decoding can be broken up into two
main concepts:
•The Quasi Split Sound concept used in Europe and some
AP sets.
•The Inter Carrier concept, used in NAFTA and LATAM.
The UOC-III family makes no difference anymore between
QSS- and Intercarrier IF, nearly all types are softwareswitchable between the two SAW-filter constructions.
Simple data settings are required for the set to determine
whether it is using the Inter Carrier or the QSS concept. These
settings are done via the “QSS” and “FMI” bit found in SAM
mode. Due to the diversity involved, the data for the 2 bits are
being placed in the NVM location and it is required to write once
during startup.
On top of that, it can be further broken down into various
systems depending on the region. The systems or region
chosen, will in turn affect the type of sound standard that is/are
allowed to be decoded.
•For the case of Europe, the standard consists of BG/DK/I/
LL’ for a Multi-System set. There are also versions of
Eastern Europe and Western Europe set and the standard
for decoding will be BG/DK and I/DK respectively. FM
Radio is a feature diversity for the Europe sets. The same
version can have either FM Radio or not, independent of
the system (e.g. sets with BG/DK/I/LL’ can have or not
have FM radio).
•For the case of NAFTA and LATAM, there is only one
transmission standard, which is the M standard. The
diversity then will be based on whether it has a dBx noise
reduction or a Non-dBx (no dBx noise reduction).
•For the case of AP, the standard consists of BG/DK/I/M for
a Multi-System set. The diversity here will then depends on
the region. AP China can have a Multi-System and I/DK
version. For India, it might only be BG standard.
9.8.2Functionality
The features available in the Hercules are as follows:
•Treble and Bass Control.
•Surround Sound Effect that includes:
– Incredible Stereo.
– Incredible Mono.
– 3D Sound (not for AV Stereo).
– TruSurround (not for AV Stereo).
– Virtual Dolby Surround, VDS422 (not for AV Stereo).
– Virtual Dolby Surround, VDS423 (not for AV Stereo).
– Dolby Pro-Logic (not for AV Stereo).
•Bass Feature that includes:
– Dynamic Ultra-Bass.
– Dynamic Bass Enhancement.
– BBE (not for AV Stereo).
•Auto-Volume Leveler.
•5 Band Equalizer.
•Loudness Control.
Page 82
EN 82L04A AA9.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
All the features stated are available for the Full Stereo versions
and limited features for the AV Stereo
9.8.3 Audio Amplifier
The audio amplifier part is very straightforward. It uses the
integrated power amplifier TDA2616Q, and delivers a
maximum output of 2 x 10 W_rms.
The maximum operating condition for this amplifier is 21 V
unloaded. Normal operating supply is from 7.5 V to 16 V.
Muting is done via the VOLUME_MUTE line connected to pin
2 of the amplifier-IC and coming from the UOC.
The following table shows pin functionality of the Audio
Amplifier:
Table 9-13 Pinning overview TDA2616
Pin Pin NameNormal Operation
1 Input LeftInput AC signal
2 Mute16 V_dc
3 Ground0 V
4 Output L Channel AC waveform
5 Supply Voltage (negative)-16 V_dc
6 Output R ChannelAC waveform
7 Supply Voltage (positive)+ 16 V_dc
8 Inverting inputs L and R0 V
9 Input RightInput AC signal
9.9Picture in Picture (PIP)
The PIP application has two tuners, one with a splitter on the
main chassis and another with "phono" input on the PIP panel.
The same signal is injected to both tuners, so that it does not
need separate auto tuning for the PIP tuner.
The TDA9887TS (item 7201) is an alignment free multistandard vision and sound IF signal PLL demodulator for
positive and negative modulation, including sound AM and FM
processing.
The SDA9489 (item 7242) is a multi system color decoder with
many features such as: half screen size PIP, selectable YUV or
YPbPr, 16:9 application, WSS detection, Closed Caption, and
OSD display for PIP window etc.
The PIP power supply is based on the step down converter
principle. The +9V input voltage is converted to +5V and +3.3V
via the regulator (item 7501).
algorithm that installs TV sets directly
from cable network by means of a
predefined TXT page
ADCAnalogue to Digital Converter
AFCAutomatic Frequency Control: control
signal used to tune to the correct
frequency
AFTAutomatic Fine Tuning
AGCAutomatic Gain Control: algorithm that
controls the video input of the feature
box
AMAmplitude Modulation
APAsia Pacific region
ARAspect Ratio: 4 by 3 or 16 by 9
ATSAutomatic Tuning System
AVExternal Audio Video
AVLAutomatic Volume Leveler
BCLBeam Current Limitation
B/GMonochrome TV system. Sound
carrier distance is 5.5 MHz
BTSCBroadcast Television Standard
Committee. Multiplex FM stereo sound
system, originating from the USA and
used e.g. in LATAM and AP-NTSC
countries
CCClosed Caption
CCCContinuous Cathode Calibration
ComPairComputer aided rePair
CRTCathode Ray Tube or picture tube
CSMCustomer Service Mode
CTIColor Transient Improvement:
manipulates steepness of chroma
transients
CVBSComposite Video Blanking and
Synchronization
CVIComponent Video Input
DACDigital to Analogue Converter
DBXDynamic Bass Expander or noise
reduction system in BTSC
D/KMonochrome TV system. Sound
carrier distance is 6.5 MHz
DFUDirection For Use: description for the
end user
DNRDynamic Noise Reduction
DSPDigital Signal Processing
DSTDealer Service Tool: special remote
control designed for dealers to enter
e.g. service mode
DVDDigital Versatile Disc
EEPROMElectrically Erasable and
Programmable Read Only Memory
EHTExtra High Tension
EHT-INFOExtra High Tension information
EPGElectronic Programming Guide
EUEurope
EWEast West, related to horizontal
deflection of the set
EXTExternal (source), entering the set via
SCART or Cinch
FBLFast Blanking: DC signal
accompanying RGB signals
FILAMENTFilament of CRT
FMField Memory or Frequency
Modulation
HHorizontal sync signal
HPHeadphone
IMonochrome TV system. Sound
carrier distance is 6.0 MHz
I2CIntegrated IC bus
IFIntermediate Frequency
Page 83
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
IICIntegrated IC bus
ITVInstitutional TV
LATAMLatin American countries like Brazil,
Argentina, etc.
LEDLight Emitting Diode
L/L'Monochrome TV system. Sound
carrier distance is 6.5 MHz. L' is Band
I, L is all bands except for Band I
LSLarge Screen or Loudspeaker
M/NMonochrome TV system. Sound
carrier distance is 4.5 MHz
NCNot Connected
NICAMNear Instantaneous Compounded
Audio Multiplexing. This is a digital
sound system, mainly used in Europe.
NTSCNational Television Standard
Committee. Color system mainly used
in North America and Japan. Color
carrier NTSC M/N = 3.579545 MHz,
NTSC 4.43 = 4.433619 MHz (this is a
VCR norm, it is not transmitted off-air)
NVMNon Volatile Memory: IC containing
TV related data e.g. alignments
OBOption Bit
OCOpen Circuit
OPOption Byte
OSDOn Screen Display
PALPhase Alternating Line. Color system
mainly used in West Europe (color
carrier = 4.433619 MHz) and South
America (color carrier PAL M =
3.575612 MHz and PAL N = 3.582056
MHz)
PCBPrinted Circuit board
PLLPhase Locked Loop. Used for e.g.
FST tuning systems. The customer
can give directly the desired frequency
PIPPicture In Picture
PORPower-On Reset
PTPPicture Tube Panel (or CRT-panel)
RAMRandom Access Memory
RCRemote Control handset
RGBRed, Green, and Blue video signals
ROMRead Only Memory
SDAMService Default / Alignment Mode
SAPSecond Audio Program
SCSandcastle: pulse derived from sync
signals
S/CShort Circuit
SCLSerial Clock
SDASerial Data
SECAMSEequence Couleur Avec Memoire.
Color system mainly used in France
and East Europe. Color carriers =
4.406250 MHz and 4.250000 MHz
SIFSound Intermediate Frequency
SSSmall Screen
STBYStandby
SVHSSuper Video Home System
SWSoftware
THDTotal Harmonic Distortion
TXTTeletext
uPMicroprocessor
UOCUltimate One Chip
VVertical sync signal
V_BATMain supply voltage for the deflection
stage (mostly 141 V)
V-chipViolence Chip
VCRVideo Cassette Recorder
WYSIWYRWhat You See Is What You Record:
record selection that follows main
picture and sound
XTALQuartz crystal
YCLuminance (Y) and Chrominance (C)
signal
EN 83L04A AA9.
Page 84
EN 84L04A AA9.
9.11 IC Data Sheets
This section shows the internal block diagrams and pin layouts
of ICs that are drawn as "black boxes" in the electrical diagrams
(with the exception of "memory" and "logic" ICs).
9.11.1 Diagram F, TDA9887 (IC7201)
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
BLOCK DIA
VIF2
2
1
VIF1
SIF2
24
23
SIF1
GRAM
C
VAGC(pos)
TAGC
14
C
AGC(neg)
TUNER AGC
SUPPLYSIF AGC
AGND
V
P
VAGCTOP
VIF-AGC
VIF-PLL
filter
VPLL
199161521
C
BL
RC VCO
VIF-PLL
SINGLE REFERENCE QSS MIXER
INTERCARRIER MIXER
AND AM DEMODULATOR
MAD
OUTPUT
PORTS
C
AGC
OP1 OP2FMPLLFMIN
I2C-BUS TRANSCEIVER
113
22
external reference signal
or 4 MHz crystal
REFAFC
DIGITAL VCO CONTROL AFC DETECTOR
SOUND TRAPS
4.5 to 6.5 MHz
TDA9887TS
AUDIO PROCESSING
AND SWITCHES
NARROW-BAND
FM-PLL DEMODULATOR
121820
7
SIOMADSDASCL
DGND
17
CVBS
video output: 2 V (p-p)
[1.1 V (p-p) without trap]
AUD
8
5
6
41310
MHC143
DEEM
AFD
audio output
de-emphasis
network
C
AF
PIN CONFIGURATION
sound intercarrier output
and MAD select
VIF1
VIF2
OP1
FMPLL
DEEM
AFD
DGND
AUD
TOP
SDA
SCL
SIOMAD
1
2
3
4
5
6
TDA9887TS
7
8
9
10
11
12
MHC144
SIF2
24
SIF1
23
OP2
22
AFC
21
V
20
P
19
VPLL
AGND
18
17
CVBS
VAGC
16
REF
15
TAGC
14
FMIN
13
Figure 9-6 Internal Block Diagram and Pin Configuration
FM-PLL
filter
E_14480_129.eps
120504
Page 85
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
9.11.2 Diagram H, TDA9178 (IC7610)
BLOCK DIAGRAM
EN 85L04A AA9.
Sout
Yin
Uin
Vin
DEC
DIG
Vcc
ground
Sandcastle
inputstage
supply
window
generation
calibrate
Y
U,V
Luminance vector processing
luminance
processing
saturation
correction
skin tone correction
green enhancement
blue stretch
noise
measuring
featuremode
detection
black stretch
histogram processing
gamma control
colour vector processing
"cue flash"
spectral processing
smart peaking
LTI
VDC
delay
control
colour
processing
CDS
CTI
+
ADC
output
stage
ADext1 (low frequencies)
ADext2 (low frequencies)
ADext3 (low frequencies)
Yout
Uout
Vout
CF
I2C
PIN CONFIGURATION
2
C-control
I
Sc
Nc
ADEXT1
ADEXT2
ADEXT3
Yin
1
2
3
4
5
6
24
23
22
21
20
19
TDA9178
ADR
Uin
Vin
TP
SCL
NcNc
7
8
9
10
11
1213
18
17
16
15
14
Nc
Nc
CF
Sout
Vcc
Yout
Vee
Uout
Vout
DEC
SDA
DIG
E_14480_075.eps
270204
Figure 9-7 Internal Block Diagram and Pin Configuration