Copyright 2005 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.
Ge - Y 0.7 V_pp / 75 ohm jq
Bu - Pb 0.7 V_pp / 75 ohm jq
Rd - Pr 0.7 V_pp / 75 ohm jq
AV1 In
Ye - Video (CVBS) 1 V_pp / 75 ohm jq
Wh - Audio - L 0.5 V_rms / 10 kohm jq
Rd - Audio - R 0.5 V_rms / 10 kohm jq
AV2 In
Ye - Video (CVBS) 1 V_pp / 75 ohm jq
Wh - Audio - L 0.5 V_rms / 10 kohm jq
Rd - Audio - R 0.5 V_rms / 10 kohm jq
AV2 In (SVHS)
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
Technical Specifications, Connections, and Chassis Overview
1.4Chassis Overview
EN 3L04A AB1.
B1
CRT
ECO
B2
SCAVEM
SIDE AV PANEL +
D
HEADPHONE
T1
DPTV SDP
Y Pb Pr INPUT
T2
RGB INPUT
ADC
T3
SDRAM
T4
DISPLAY &
T5
PROCESSING
TRIDENT INTERFACE PANEL
TI
B1
CRT
ECO
B2
SCAVEM
CRT PANEL
TRIDENT PANEL
CRT PANEL
Figure 1-3 PWB location without Top Control
MONO
CARRIER
FRONT INTERFACE PANEL
POWER SUPPLY
LINE & FRAME DEFLECTION
TUNER IF
HERCULES
FEATURES & CONNECTIVITIES
CLASS D AUDIO AMPLIFIER
AUDIO AMPLIFIER
REAR I/O CINCH
FRONT CONTROL
DVD POWER SUPPLY
E_14770_045.eps
TOP CONTROL PANEL
FRONT INTERFACE PANEL
J
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
010904
E
J
SIDE AV PANEL +
D
HEADPHONE
T1
DPTV SDP
Y Pb Pr INPUT
T2
RGB INPUT
ADC
T3
SDRAM
T4
DISPLAY &
T5
PROCESSING
TRIDENT INTERFACE PANEL
TI
TRIDENT PANEL
Figure 1-4 PWB location with Top Control
MONO
CARRIER
POWER SUPPLY
LINE & FRAME DEFLECTION
TUNER IF
HERCULES
FEATURES & CONNECTIVITIES
CLASS D AUDIO AMPLIFIER
AUDIO AMPLIFIER
REAR I/O CINCH
FRONT CONTROL
DVD POWER SUPPLY
E_14770_057.eps
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
231204
EN 4L04A AB2.
Safety Instructions, Warnings, and Notes
2.Safety Instructions, Warnings, and Notes
Index of this chapter:
2.1 Safety Instructions
2.2 Warnings
2.3 Notes
2.1Safety Instructions
Safety regulations require that during a repair:
•Connect the set to the Mains (AC Power) via an isolation
transformer (> 800 VA).
•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.
Safety regulations require that after a repair, the set must be
returned in its original condition. Pay in particular attention to
the following points:
•Route the wire trees correctly and fix them with the
mounted cable clamps.
•Check the insulation of the Mains (AC Power) lead for
external damage.
•Check the strain relief of the Mains (AC Power) cord for
proper function.
•Check the electrical DC resistance between the Mains (AC
Power) plug and the secondary side (only for sets which
have a Mains (AC Power) isolated power supply):
1. Unplug the Mains (AC Power) cord and connect a wire
between the two pins of the Mains (AC Power) plug.
2. Set the Mains (AC Power) switch to the "on" position
(keep the Mains (AC Power) cord unplugged!).
3. Measure the resistance value between the pins of the
Mains (AC Power) plug and the metal shielding of the
tuner or the aerial connection on the set. The reading
should be between 4.5 Mohm and 12 Mohm.
4. Switch "off" the set, and remove the wire between the
two pins of the Mains (AC Power) plug.
•Check the cabinet for defects, to avoid touching of any
inner parts by the customer.
2.2Warnings
Service Default Mode (see chapter 5) with a colour 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 stand-by (F). These values are
indicated by means of the appropriate symbols.
•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.
2.3.2Schematic 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 given in micro-farads (µ= x10
nano-farads (n= x10
•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 Spare Parts
List. Therefore, always check this list when there is any
doubt.
2.3.3Rework on BGA (Ball Grid Array) ICs
General
Although (LF)BGA assembly yields are very high, there may
still be a requirement for component rework. By rework, we
mean the process of removing the component from the PWB
and replacing it with a new component. If an (LF)BGA is
removed from a PWB, the solder balls of the component are
deformed drastically so the removed (LF)BGA has to be
discarded.
-9
), or pico-farads (p= x10
-12
-6
),
).
•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 same potential. Available
ESD protection equipment:
– Complete kit ESD3 (small tablemat, wristband,
connection box, extension cable and earth cable) 4822
310 10671.
– Wristband tester 4822 344 13999.
•Be careful during measurements in the high voltage
section.
•Never replace modules or other components while the unit
is switched "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.
2.3Notes
2.3.1 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
Device Removal
As is the case with any component that, it is essential when
removing an (LF)BGA, the board, tracks, solder lands, or
surrounding components are not damaged. To remove an
(LF)BGA, the board must be uniformly heated to a temperature
close to the reflow soldering temperature. A uniform
temperature reduces the chance of warping the PWB.
To do this, we recommend that the board is heated until it is
certain that all the joints are molten. Then carefully pull the
component off the board with a vacuum nozzle. For the
appropriate temperature profiles, see the IC data sheet.
Area Preparation
When the component has been removed, the vacant IC area
must be cleaned before replacing the (LF)BGA.
Removing an IC often leaves varying amounts of solder on the
mounting lands. This excessive solder can be removed with
either a solder sucker or solder wick. The remaining flux can be
removed with a brush and cleaning agent.
After the board is properly cleaned and inspected, apply flux on
the solder lands and on the connection balls of the (LF)BGA.
Note: Do not apply solder paste, as this has shown to result in
problems during re-soldering.
Device Replacement
The last step in the repair process is to solder the new
component on the board. Ideally, the (LF)BGA should be
Safety Instructions, Warnings, and Notes
EN 5L04A AB2.
aligned under a microscope or magnifying glass. If this is not
possible, try to align the (LF)BGA with any board markers.
To reflow the solder, apply a temperature profile according to
the IC data sheet. So as not to damage neighbouring
components, it may be necessary to reduce some
temperatures and times.
More Information
For more information on how to handle BGA devices, visit this
URL: www.atyourservice.ce.philips.com (needs subscription,
not available for all regions). After login, select “Magazine”,
then go to “Workshop Information”. Here you will find
Information on how to deal with BGA-ICs.
2.3.4 Lead Free Solder
Philips CE is going to produce lead-free sets (PBF) from
1.1.2005 onwards.
P
b
Figure 2-1 Lead-free logo
This sign normally has a diameter of 6 mm, but if there is less
space on a board also 3 mm is possible.
be available till the end of the service period. For the repair
of such sets nothing changes.
In case of doubt whether the board is lead-free or not (or with
mixed technologies), you can use the following method:
•Always use the highest temperature to solder, when using
SAC305 (see also instructions below).
•De-solder thoroughly (clean solder joints to avoid mix of
two alloys).
Caution: For BGA-ICs, you must use the correct temperatureprofile, which is coupled to the 12NC. For an overview of these
profiles, visit the website www.atyourservice.ce.philips.com
(needs subscription, but is not available for all regions)
You will find this and more technical information within the
"Magazine", chapter "Workshop information".
For additional questions please contact your local repair help
desk.
2.3.5Practical Service Precautions
•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 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.
Regardless of this logo (is not always present), one must treat
all sets from this date onwards according to the following rules.
Due to lead-free technology 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. In general, use of solder paste within
workshops should be avoided because paste is not easy to
store and to handle.
•Use only adequate solder tools applicable for lead-free
soldering tin. The solder tool must be able
– To reach at least a solder-tip temperature of 400°C.
– To stabilise the adjusted temperature at the solder-tip.
– To exchange solder-tips for different applications.
•Adjust your solder tool so that a temperature around 360°C
- 380°C is reached and stabilised at the solder joint.
Heating time of the solder-joint should not exceed ~ 4 sec.
Avoid temperatures above 400°C, otherwise wear-out of
tips will rise drastically and flux-fluid will be destroyed. To
avoid wear-out of tips, switch “off” unused equipment or
reduce heat.
•Mix of lead-free soldering tin/parts with leaded soldering
tin/parts is possible but PHILIPS recommends strongly to
avoid mixed regimes. If not to avoid, clean carefully the
solder-joint from old tin and re-solder with new tin.
•Use only original spare-parts listed in the Service-Manuals.
Not listed standard material (commodities) has to be
purchased at external companies.
•Special information for lead-free BGA ICs: these ICs will be
delivered in so-called "dry-packaging" to protect the IC
against moisture. This packaging may only be opened
short before it is used (soldered). Otherwise the body of the
IC gets "wet" inside and during the heating time the
structure of the IC will be destroyed due to high (steam)pressure inside the body. If the packaging was opened
before usage, the IC has to be heated up for some hours
(around 90°C) for drying (think of ESD-protection!).
Do not re-use BGAs at all!
•For sets produced before 1.1.2005, containing leaded
soldering tin and components, all needed spare parts will
EN 6L04A AB3.
3.Directions for Use
You can also download this information from the following
websites:
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 Trident assy/panel (see
paragraph “Trident Assy/Panel removal”).
4.3Assies/Panels Removal
4.3.1Front assy/panel Removal
1
Figure 4-2 Front assy/panel removal
E_14770_038.eps
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E_14970_040.eps
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Figure 4-1 Service position Mono Carrier
1. Disconnect the degaussing coil.
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.
3. Turn the chassis tray 90 degrees counter clockwise.
4. Move the panel bracket somewhat to the left and flip it 90
degrees, 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 and secure it.
1
E_14770_039.eps
010904
Figure 4-3 Front panel detail
1. Remove the complete module from the bottom plate, by
pulling the fixation clamp [1] left on the bracket (see Front
assy/panel removal), while sliding the module to the left.
Note: this clamp is difficult to access.
2. Release the two fixation clamps at the side of the bracket,
and lift the panel out of the bracket (it hinges at one side).
EN 14L04A AB4.
Mechanical Instructions
4.3.2 Side AV Assy/Panel Removal
Figure 4-4 AV assy/panel removal
Remove the IO bracket by pulling the fixation clamp [1] while
sliding it away from the front side.
4.3.3 Trident assy/panel Removal
E_14770_041.eps
010904
1. Remove screw [1] at the bottom of the Trident bracket.
2. To remove bracket pull both fixation clamps [2] while lifting
at the opposite side near the heatsink [3].
3. To remove shielding bracket push fixation clamps [4] and
pull at the top.
4. To remove the Trident assy from the remaining bracket
release the two fixation clamps [5] (see Trident assy)
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
4
2
1
Figure 4-5 AV assy/panel removal
3
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010904
3
Figure 4-6 Trident assy
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010904
Service Modes, Error Codes and Fault Finding
5.Service Modes, Error Codes and Fault Finding
EN 15L04A AB5.
Index of this chapter:
5.1 Test Points
5.2 Service Modes
5.3 Problems and Solving Tips Related to CSM
5.4 ComPair
5.5 Error Codes
5.6 The Blinking LED Procedure
5.7 Protections
5.8 Fault Finding and 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).
Table 5-2 Software cluster overview
SW Cluster SW name Hercules Diversity 12 NCChecksumROM SizsSpecial Features
Abbreviations: CC = Closed CaptionNONTXT= No teletextMULTISND=2CS BG, 2CS D/K, FM/FM (5.5-5.74) (B/G),
FM/FM (6.5-6.74) (China), NICAM B/G (5.5-5.85), NICAM D/K (6.5-5.85) (Hung), NICAM I (6.0-6.52)
EN 16L04A AB5.
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.
– 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 +8Vprotection. 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.
•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
. White Tone
. Geometry
. Audio
. NVM Editor
. ComPair Mode off
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Figure 5-2 SAM menu
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Service Modes, Error Codes and Fault Finding
EN 17L04A AB5.
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 01535 L04T1 1.0 CSM
2 CODES 0 0 0 0 0
3 OP 185 141 128 033 252 136 000
4 nnXXnnnn/nnX
5 P3C-1
6 NOT TUNED
7 PAL
8 STEREO
9 CO 50 CL 50 BR 50 HU 0
0 AVL Off BS 50
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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.
010904
EN 18L04A AB5.
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
5.4.1Introduction
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 L01.1U AC chassis,
schematics and CBAs are only a mouse-click away.
Service Modes, Error Codes and Fault Finding
EN 19L04A AB5.
5.4.2 Specifications
ComPair consists of a Windows based faultfinding program
and an interface box between PC and the product. The
ComPair interface box is connected to the PC via a serial or
RS232 cable.
In the case of the L01 chassis, the ComPair interface box and
the TV communicate via a bi-directional service cable via the
service connector (connector 0267).
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.
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 0267).
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.
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
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.
5.5.2How 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.
I2C SERVICE
CONNECTOR
9V DC
E_06532_008.eps
180804
TO
EN 20L04A AB5.
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).
2High beam (BCI) protection Not applicable3404, 7405A2
3Vertical guard protection Not applicable3466, 7451, 7452, 7453, 7454A2
4I2C error while communicating with 2nd tunerNot applicableNot applicableN.A
5+5v protectionNot applicable7604,7605A5
6General I2C errorI2C bus7200,3214 or 3207A4
7Power Down (over current) protection Not applicableNot applicableN.A
8EW protection (sets with EW circuitry) Not applicableNot applicableN.A
9I2C error while communicating with the EEPROM IC M24C16-WBN6 (ST00) L7601, 3604, 3605A5
10I2C error while communicating with the PLL tunerTUNER UV1356A/A I G-3 (T.B.C)1000,3000 or 3001A3
11Black current loop instability protectionIC TDA6108JF/N1 (PHSE) L7330, 3351, CRTB1
12I2C error while communicating with the PIP processorNot applicableN.AN.A
13I2C error while communicating with the Voice control processorNot applicableN.AN.A
14I2C error while communicating with the DVD Interface moduleNot applicableN.AN.A
15I2C error while communicating with LTI module Not applicableN.AN.A
16I2C error while communicating with PIP_DemodulatorNot applicableN.AN.A
17I2C error while communicating with IBO moduleNot applicableN.AN.A
18I2C error while communicating with other I2C IBO module Not applicableN.AN.A
19I2C error while communicating with SSD stereo sound decoderIC SM TDA12010H1/N1B51 (PHSE)Y 7200A4
20I2C error while communicating with video cosmic in Hercules ICIC SM TDA12010H1/N1B51 (PHSE)Y 7200A4
21I2C error while communicating with the 3D processor (DPTV SVP).IC SM DPTVSVP (TRDI) Y3204,3206,7201-3T1
22I2C error while communicating with the High End output proc. (TDA9330H). IC SM TDA9330H/N3 (PHSE) R3244,7218,3243T5
23I2C error while communicating with the OSD memory (MTV030).IC MTV030N-64 (MYTE) L7217,3288,3289T5
24I2C error while communicating with the ADC (MST9893B).IC SM MST9883-110 (MSTA) Y 3263 or 3264 or 7204 T3
Service Modes, Error Codes and Fault Finding
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.
Service Modes, Error Codes and Fault Finding
EN 21L04A AB5.
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
5.8.2Power 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
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.
Table 5-4 NVM default values
AlignmentDefault values (HEX)
EW (EW width)1B
PW (EW parabola width)2E
HS (Horizontal shift)26
HP (Horizontal parallelogram)7
HB (Horizontal Bow)7
UCP (EW upper corner parabola)16
LCP (EW lower corner parabola)1F
TC (EW trapezium)1B
VS (Vertical slope)2C
VA (Vertical amplitude)2C
SC (S-Correction)1F
VSH (Vertical Shift)18
VX (Vertical Zoom)19
VSL (Vertical scroll)1F
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
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
EN 22L04A AB5.
Service Modes, Error Codes and Fault Finding
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
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
Yes
Check Horizontal
Deflection
Circuitry
CB
Ok
Not Ok
Ok
Picture
appears?
Picture not appearing
Check deflection
circuit
Picture not appearing
Picture
appears?
Ok
Not Ok
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
Ok
Figure 5-9 Fault finding tree “Blank screen”
5.8.4Source 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.
End
E_14480_061.eps
170204
Check Vertical
Deflection Circuit
E_14480_060.eps
170204
Figure 5-8 Fault finding tree “One thin horizontal line”
Service Modes, Error Codes and Fault Finding
EN 23L04A AB5.
5.8.5 Tuner 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
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,
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.
No Picture, No Sound
Yes
Check tuning
supply voltage,
pin 9 of tuner
>30V & <35V
Check supply
voltage, pin 7 of
tuner
No
No Picture,
No Sound,
Raster Ok
Check AGC
Voltage, pin 1
of tuner
AGC voltage
changes with
different signal
strength
Check
Supply
V
T
Section
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
No
No
Refer to fig.
"Power Supply:
Set not working"
Replace SAW
filter
No
Check AGC
circuit section
5V
Yes
Check Tuner
pin 4 & 5
I2C Bus
Ok
Yes
Replace Tuner
Check Power
No
No
Supply
Check other
functional area
E_14480_062.eps
Figure 5-10 Fault finding tree “No picture, no sound”
170204
Check other
functional area
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
Figure 5-12 Fault finding tree “Unable to perform tuning”
EN 24L04A AB5.
Service Modes, Error Codes and Fault Finding
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 NVM default. 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.
5.8.8Audio Processing
No Sound
Picture Ok,
No Sound
Tuner IF OkCheck Tuner/IFNot Ok
Ok
Check AUDOUTLSL &
AUDOUTLSR pin at
Hercules
Ok
Check Audio
Amplifier
Not Ok
Not Ok
Check Hercules IC
Check Audio
Power Supply
Ok
Check Audio
Amplifier Circuit
and loud speaker
Ok
Check NVM
Not Ok
Figure 5-13 Fault finding tree “No sound”
No RF audio for QSS/Inter-Carrier stereo sets.
1. Check pin 99 and 100 for SIF signal (for QSS) or pin 104
and 105 for video with SIF (for Inter-Carrier)
2. If signal is not present, check for the QSS/FMI bit settings.
Check also the NVM data.
3. If signals are present and still no audio, check the audio
supply voltage +8V are present.
4. If still no audio signal at Hercules output, Hercules is faulty.
No AV audio.
1. Check troubleshooting methods in section “Source
Selection”.
2. Check the output of the Hercules to see if there is signal
available. If no, check the normal operating condition and
also the NVM data.
3. If still no audio signal at Hercules output, Hercules is faulty.
Note: If there is audio signal at Hercules output and no audio
at loudspeaker, proceed to Audio Amplifier troubleshooting
methods.
5.8.9Audio Amplifier
No RF as well as AV audio at the loudspeaker:
1. Check that the normal operation condition of the amplifier
is met.
2. If normal operation conditions are met, check the continuity
from Hercules output to input of the amplifier.
3. If continuity is there and still no audio, check speaker wire
connections. If still no audio, amplifier IC might be faulty
Check Power
Supply
Replace Audio
Amplifier
E_14480_065.eps
170204
Block Diagrams, Testpoint Overviews, and Waveforms
6.Block Diagrams, Testpoint Overviews, and Waveforms
Wiring Diagram
(component view)
CRT PANEL
B
25L04A AB6.
DEGAUSSING COIL
AQUADAG
CRT
EHT
CRT
CVBS (YELLOW)
LEFT (WHITE)
RIGHT (RED)
HEADPHONE
SIDE
D
A/V PANEL +
HEADPHONE
BLACK
RED
1279
3P
RIGHT
SPEAKER
1252
7P
1254
5P
1278
4P
5P
1280
1331
5P
1351
1332
1352
9P
CRT
SOCKET
1361
3P
RED
B
SCAVEM
COIL
LEFT
SPEAKER
CRT PANEL
1381
3P
BLACK
RED
FRONT INTERFACE
J
0214
6P
0212
2P
MAINS
SWITCH
1211
2P
MAINS
CORD
1582
1510
1693
6P
1509
1504
2P
2P
1508
MONO
A
CARRIER
4P
T
1201
6P
TRIDENT
1204
9P
1205
1206
15P
15P
TRIDENT
TI
INTERFACE
1205
15P
1206
15P
1202
1682
1244
3P
1246
3P
1221
3P
4P
1245
5P
1219
9P91
1403
1401
1451
2P
11P
5P
LOT
1404
2P
5401
E_14770_001.eps
180404
1206
7P
4P
1204
1203
5P5P5P
1208
1201
6P
11P
COMPAIR
CONNECTOR
1005
1207
7P
TUNER
1013
3P
Block Diagrams, Testpoint Overviews, and Waveforms
Block Diagram Supply and Deflection
26L04A AB6.
SUPPLY AND DEFLECTION
SUPPLY
FRONT INTERFACE
J
1211
A1
1505
1
2
1231
MAINS
SWITCH
(not USA)
POWER SUPPLY
Degaussing
1506
MAINS
SWITCH
(not USA)
I511
6512
3519
7532
F508 268V / div DC
F511 15V5 / div DC
F531 2V7 / div DC
F537 0V (N.A.)
I513I516I519I533
Coil
2511
6533
3530
I531
1500
T4E
2
6
3
6
11
7511
TEA1506T
Vcc
CTRL
STANDBY
7531
TEA1623
Vcc
REG
AUX
0212
1
2
1504
2
3507
1
t
5500 :
5502
14
DRAIN
DRIVER
SENSE
CONTROL
IC
DEMAG
SUPPLY
DRAIN
CONTROL
IC
SOURCE
F552 130V / div DC
F561 15V9 / div DC
F564 9V4 / div DC
F573 0V (N.A.)
11
9
7
14
12
6532
TRIDENT INTERFACE BOARDA
DEFLECTION
T1
7201-2
6930DPTVSVP
SEE ALSO
BLOCK DIAGRAM
DAC
&
DDP
7541
1503
43
2
6500
AC
I513
3513
3514
I519
3532
3517
3518
I533
3534
3531
DC
2534
3538
6511
G
7512
F508
2505
MAIN
SUPPLY
3516
D
S
I516
7514
1532
T315mA
3532
5512
9
8
4
5
3
2
4
3
5531
4
5
1
2
(optional)
55515552
17
18
5562
13
14
5561
10
11
1
7513
TCET1103
2
6564
6535
10
9
6536
8
6
ENERGIZING
CIRCUIT
1
6551
6563
6562
3571
6573
2564
2535
2536
V_DG
F552
1543
6571
7571
REFERENCE
CIRCUIT
7573
STANDBY
CIRCUIT
6565 6566
3565
F536
6537
I548
G
7561
6676
DS
7536
I573
7535
For IDTV only
Vbatt
F563
-Vaudio
F561
+Vaudio
+6VA
3575
3576
Stdby_Con
POWER-DOWN
A4
F564
+3V
+6VA
+6VA
5537
+6V
F537
Vaux
B
A4
TRIDENT INTERFACE
TI
EHTb
H_DRIVE
EW_DRIVE
EHT_INFO
V_GUARD
7208
L4978
SUPPLY
FB
7207
L78L05ACZ
7201
6930DPTVSVP
45
8
PROC
HD
VDRA
VDRB
BCL
6206
5203
+9V
+5V
+8V
1201
1205
1
2
3
4
5
6
7
8
9
10
11
7
TO
6
1205
T5
5
1206
8
12
2
4
6
7
10
9
11
A4
1202
2x
TO
1202
A10
1
2
3
4
LINE + FRAME DEFLECTION
A2
1403
EHTb
1
A2
HD
2
H_DRIVE
3
4
EW_DRIVE
5
VDRA
6
+9V
7
VDRB
8
BCL
9
10
11
EHT_INFO
V_GUARD
A2
A2
VDRA
VDRB
DPTV_R
27
DPTV_G
28
DPTV_B
29
V_SYNC
35
H_SYNC
34
HD
F460
F461
7404
74557456
T5
VIDEO
LINE
5402
E/W
34393497
+9V
DISPLAY & PROCESSING
(SYNC PART)
7218
TDA9332H
Y_OUT
28
U_OUT
27
V_OUT
26
YUV
30
31
32
MATRIX
23
24
SDA
11
SCL
10
Vbatt
F414
7405
BU4508DX
F418
OUTPUT
CIRCUIT
7406
3462
3449
HD
3463
5403
6408
Y/U/V
RGB
MATRIX
HOP
RGB
YUV
PH1-122PH1-2
12MHz
CORR.
1301
LINE
E/W
ERR
91413
2120
5410
1404
1
2
+
FRAME
7451
7454
6458
7453
7452
-12V
22
3
1
HOR.
DEFL.
COIL
35 36 37 38
RGB
INSERTION
OUTPUT
AMPL.
CATHODE
CALIBR.
RAMP
GEN
STARISTOP
H-DRIVE
29
5445
3466
3461
E/W
DRIVE
FRAME
3474
F458
1491
1
2
F459
3471
43
R
40
G
41
B
42
44
3
EHT_INFO
4
2
1
8
5
EHT
FOCUS VG2
10
6
5
7
8
9
VER.
DEFL.
COIL
R_OUT
G_OUT
B_OUT
BC
1455
6456
1456
6464
6442
34523451
TO
CRT
B1
3442
Vbatt
VD
V_GUARD
1454
EHT_INFO
SEE ALSO
BLOCK DIAGRAM
VIDEO
EW_DRIVE
7481 : 7483
3481
6481
6452
6483 6484
3458
6453
1452
6459
64546460
A4
ABL
VD+
VD-
H_DRIVE
HD
FLASH
V_GUARD
EHTb
+
EHTinfo
+
BCL
PROC.
5409
2456
VIDEO/SUPPLY
Vbatt
3401
1206
POWER-DOWN
EHTb
EHTinfo
BCL
F452
F453
VIDEO/SUPPLY
FILAMENT
EHTb
FILAMENT
F401
10
9
4
6
7
2
12
8
11
A1
A2
A2
A2
-12V
+9V
1401
VT_SUPPLY
A3
5
4
TO 135 1
3
B1
2
CRT
1
100V / div DC
5µs / div
100V / div DC
5µs / div
2V / div DC
5µs / div
100V / div DC
5µs / div
HOT GROUND COLD GROUND
E_14770_002.eps
260804
Block Diagrams, Testpoint Overviews, and Waveforms
•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
west, at the height of the centreline, are of minimum width
without visible haze.
Focus
Screen
5512
B
LOT
VG2
E_14480_030.eps
130204
A
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
. Cool . Delta Warm Red 4
. Normal . Delta Warm Green 0
. Warm . Delta Warm Blue -5
. BL R 4
. BL G 0
SAM
. Delta Cool Red -1
. Delta Cool Green 4
. Delta Cool Blue 5
SAM
. Normal Red 32
. Normal Green 37
. Normal Blue 34
SAM SAM
. Horizontal.HP 5
. Vertical .HB 5
SAM SAM
. QSS On
. FMI Off
. NICAM Alignment 63
SAM
.ADR 0x0000 0
.VAL 0x0000 0
.Store Store ?
.HSH 41
.EWW 32
.EWP 43
.EWT 17
.UCP 20
.LCP 36
.SBL OFF
.VS 48
.VSH 22
.VAM 41
.VSC 19
Figure 8-3 Service Mode overview
E_14770_049.eps
010904
Alignments
EN 69L04A AB8.
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.
Table 8-1 Option Byte calculation
Bit (value) OP1 OP2 OP3 OP4 OP5 OP6 OP7
0 (1)OB10 OB20 OB30 OB40 OB50 OB60 OB70
1 (2)OB11 OB21 OB31 OB41 OB51 OB61 OB71
2 (4)OB12 OB22 OB32 OB42 OB52 OB62 OB72
3 (8)OB13 OB23 OB33 OB43 OB53 OB63 OB73
4 (16)OB14 OB24 OB34 OB44 OB54 OB64 OB74
5 (32)OB15 OB25 OB35 OB45 OB55 OB65 OB75
6 (64)OB16 OB26 OB36 OB46 OB56 OB66 OB76
7 (128)OB17 OB27 OB37 OB47 OB57 OB67 OB77
Total:Sum Sum Sum Sum Sum Sum Sum
Option Bit Assignment
Following are the option bit assignments for all software
clusters.
•Option Byte 1 (OP1)
– OB17: PHILIPS TUNER
– OB16: FM RADIO
– OB15: LNA
– OB14: ATS (EU)
– OB13: ACI
– OB12: UK PNP
– OB11: VIRGIN MODE
– OB10: CHINA
•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.
EN 70L04A AB8.
Alignments
– 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.
– 1 : SVHS3 source is available.
– Note : This option bit is not applicable for EU.
•OB51: HT 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.
Alignments
EN 71L04A AB8.
•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: MALAY
– 0 : Malay is disabled.
– 1 : Malay is enabled.
•OB75: THAI
– 0 : Thai is disabled.
– 1 : Thai is enabled.
•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”.
8.3.2 Tuner
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”
The geometry alignments menu contains several items to align
the set, in order to obtain correct picture geometry.
1
2
3
4
VERT. SLOPE
VERT. SHIFT
VERT. AMPLITUDE
V.S-CORRECTION
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).
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”.
8.3.3 White 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.
5
6
7
8
9
10
11
12
HOR. SHIFT
HOR. AMPLITUDE
E/W PARABOLE
UPPER E/W CORNER
LOWER E/W CORNER
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).
EN 72L04A AB8.
Alignments
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.
•Lower Corner Parabola (LCP). Align straight vertical lines
in the lower corners of the screen.
•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”.
8.3.5 Audio
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).
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.
Table 8-2 Default geometry values
AlignmentDefault values (HEX)
EW (EW width)1B
PW (EW parabola width)2E
HS (Horizontal shift)26
HP (Horizontal parallelogram)7
HB (Horizontal Bow)7
UCP (EW upper corner parabola)16
LCP (EW lower corner parabola)1F
TC (EW trapezium)1B
VS (Vertical slope)2C
VA (Vertical amplitude)2C
SC (S-Correction)1F
VSH (Vertical Shift)18
VX (Vertical Zoom)19
VSL (Vertical scroll)1F
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 73L04A AB9.
9.Circuit Descriptions, List of Abbreviations, and IC Data Sheets
Index of this chapter:
9.1 Introduction
9.2 Power Supply
9.3 Deflection
9.4 Control
9.5 Tuner and IF
9.6 Source Select
9.6 Source Select
9.7 Video Processing
9.8 Audio Processing
9.9 Picture in Picture (PIP)
9.10 Abbreviation list
9.11 IC Data Sheets
Notes:
•Only new (not recently published) circuits are described in
this chapter. For the other circuit descriptions, see the
L04A AA Service Manual.
•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 "L04A AB" chassis is a 2fh TV chassis for the China market
only. For the year 2004 only two large screen sizes are
available (29 and 34inch) in Real Flat 4:3 execution.
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.
In comparison to L04A AA this is a 2fh chassis. For this a new
board is added for 2fh signal processing, the so-called ‘Trident
board’. Trident Board is design to handle the standard video
display source(1fH) of either CVBS or YPbPr and High
definition video display source of 1920/1080i in 2fH according
to China GB draft for digital tv display. The scan rate
conversion from 1fH to 2fH in interlace or progressive scanning
format is performed at the scaling part of SVP chip. The SVP
also perform NTSC/PAL/SECAM video decoding function, but
this is not used. Basically, 3 output display format has been
selected to match with our 31.25/31.50 KHz CRT deflection
system design. There are 1080i/50Hz,625i/100Hz and 480p/
60Hz.
Since the deflection part is newly designed it also will use more
power thus the power supply has been modified. this chassis is
has the following (new) features:
•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, the Trident
Module consisting of a ‘Interface’ panel and ‘Trident’ panel, a
CRT (Picture Tube) panel, a Side AV panel, and a Front
Interface 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.
AV1
SVHS
/2
AV
CVI
Tu ne r
SAW SAW
SIF
VIF
UOC III
(HERCULES)
CRT Panel
O/P
Stage
2 fH Deflection
H
EW
V+
V-
8V
EHT
BCL
Hfb
5V
IIC
CVBS
YUV
RESET
CRT PANEL
(TDA6108)
RGB
TDA9332
HOP
HVBRG
SVP
H V CLK
AD9883
Y
YPbPr
(1080i)
BLK SVM
SOG
SOG
FB
MTV030
R
GENERATOR
G
B
E_14770_044.eps
Figure 9-1 Block diagram Video
The UOC-III interfaces with the DPTV SVP a digital video
processor which converts the 1fh video signal into 2fh. (see
Block diagram video) and is placed on the Trident panel. This
architecture makes it necesarry that a TDA9332 which does
the 2fh video output processing. Also a OSD generator is
added the MTV030. These latter functions of the UOC are
therefore not used.
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.
OSD
SDRAM
4x1MB
010904
EN 74L04A AB9.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
9.2Power Supply
9.2.1 Block 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 9-2 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).
9.2.2 Timing Diagrams
Notes: Shown timings may be different, given timings are for
information only.
Power ON - To Standby - Out of Standby - Power OFF
Vaux (for IDTV)
B (connected to HERCULES port B to
switch ON/OFF Vaux)
Normal
2s
(ref)
Perform
hard-reset
10ms
10ms
20ms
(ref)
(ref)
(ref)
E_14770_047.eps
010904
E_14480_072.eps
120504
Power ON - To Semi Standby - Out of Semi Standby Power OFF
Power ONPower OFFTo
3, 3.3, 6V
POWER_DOWN
STDBY
+1V8 EXT.
Stdby_con
Vbat, Vaudio
STB bit
VT_supply
+5V
PIP Supplies
B
Relay status
1s
200ms
(ref)
Standby
NormalStandby
10ms
Closed
2s
(ref)
mode
Out of
Standby
Normal
Open
800ms
Figure 9-4 Timing diagram Semi Standby
9.2.3Startup 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).
Table 9-1 Pinning overview TEA1623
Pin SymbolDescription
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 level 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.
11 DemagThis 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.
12 SenseThis pin contains three different functions.: 1) Dectection of soft
start, protection levels of 2) OCP, and 3) SWP.
14 DrainThis pin is connected to the drain of the switch or center tap of
the transformer. It contains three functions: 1) M-level (mainsdependent 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).
Perform
hard-reset
10ms
10ms
20ms
(ref)
(ref)
(ref)
E_14770_048.eps
010904
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 75L04A AB9.
Table 9-2 Pinning overview TEA1506
Pin SymbolDescription
2VccThis pin is connected to the supply voltage. When this voltage
3GndThis pin is Ground of the IC.
6CtrlThis pin is connected to the feedback loop. The pin will control
7DemagThis pin is connected to the Vcc winding of 5512. It contains
9SenseThis pin contains three different functions: 1) dectection of soft
11 DriverThis pin will drive the (MOSFET) switch.
12 HVSThis is High Volt Spacer (n.a.)
14 DrainConnected 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 operation Stdby mode
V_batt143 V ± 3%0 V
V_audio+/- 15.5 V0 V
+12V12 V ± 0.6V12 V
+6V6 V ± 0.6V6 V
+3V3 V ± 0.3V3 V
Stdby_con 0 V3.3 V
9.3Deflection
9.3.1 Synchronization
After initialisation of both the UOC and the SVP, the SVP
generates both H and V sync. The TDA9332 takes care of the
deflection signals HD, VD+, VD-, E_W and HBLK.
The VD+ and VD- signals are the balanced output currents
(sawtooth shaped). These output signals are balanced, so they
are less sensitive to disturbances.
9.3.2 Horizontal Deflection
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.
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
The TDA9332 (HOP) 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 HOP. 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 C2411 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.
East-West Driver
The East-West parabola waveform EW_DRIVE comes from
the HOP (frame frequency) and modulates the line deflection
current.
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.
EN 76L04A AB9.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
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.
•-12V: This supplies the frame amplifier.
•Frame supply: approx. 22 V (C2465).
•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.
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.
9.3.5DAF
The Dynamic Astigmatic Focus (DAF) circuit is required by
both 29RF and 34RF sets. 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.
9.3.6X-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.
9.3.7Vertical Deflection
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.
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
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 77L04A AB9.
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 CRT panel
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
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.
9.3.9 2fh synchronisation
The 2fh sync generation is done by the DPTV SVP (IC7201).
This IC converts the H and V sync signals (Hs and VS) coming
from the UOC into 2fh sync signals (HSYNC and VSYNC)
which are outputted to the TDA9332 (HOP).
The HOP again generates the necesarry deflection signals like
VD+ and VD- for the Frame deflection; HD for Line deflection;
EW_DRIVE.
9.4Control
The Micro Controller is integrated in the UOC (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.
9.4.1Block Diagram
The block diagram of the Micro Controller application is shown
below.
Power Supply
KEYBOARD/
PROTECTION
CIRCUIT
VIDEO
MONO AUDIO PROC.
LIGHT SENSOR
VOLUME/MUTE/TREBBLE /BASS/PANORAMA
AUDIO AMP
MONITOR
OUTPUT
LED
IR
Figure 9-5 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.
9.4.3Pin 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:
Table 9-4 Micro Controller ports overview
Pin NameDescriptionConfiguration
32 INT0/ P0.5IRINT0
31 P1.0/ INT1PWRDOWNINT1
30 P1.1/ T0LEDP1.1
27 P0.4/ I2SWS(for future use)-
26 P0.3/ I2SCLK(for future use)-
25 P0.2/ I2SDO2SEL_SC2_INTERF
24 P0.1/ I2SDO1(for future use)P0.1
23 P0.0/ I2SDI/OPanoramaP0.0
22 P1.3/ T1Write ProtectP1.3
21 P1.6/ SCLSCLSCL
20 P1.7/ SDASDASDA
18 P2.0/ TPWMVOL_MUTEP2.0
17 P2.1/ PWM0ROTATIONPWM0
16 P2.2/ PWM1SEL_LL'/MP2.2
15 P2.3/ PWM2STANDBY_CONP2.3
14 P3.0/ ADC0Light SensorADC0
13 P3.1/ ADC1(for future use)-
STBY_CON
POWER GOOD
KEYBOARD/PROTECTION
INPUT
OUTPUT
LIGHT SENSOR
LED
ACE/ SDM
IR
HERCULES
Micro
Controller
Horizontal
Pulse
DEFLECTION
PROTECT
P0.2
WRITE
NVM
ST24C16W6
IIC
Data
Lines
E_14770_053 .eps
TUNER
010904
EN 78L04A AB9.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
Pin NameDescriptionConfiguration
10 P3.2/ ADC2(for future use)-
9P3.3/ ADC3KEYBOARDADC3
7P2.4/ PWM3A (for future use)P2.4
6P2.5/ PWM4B (for future use)P2.5
3P1.2/ INT2C (for future use)INT2
2P1.4/ RXE (for future use)-
1P1.5/ TXD (for future use)-
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.
Table 9-5 LED signal diversity
LEDAP/ LATAM
0LED lightedStandby
1LED "off"Normal
•SCL. This is the clock wire of the two-wire single master bidirectional I2C bus.
•SDA. This is the data wire of the two-wire single master bidirectional 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)
– 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.
– 0: Hercules CVBS Output (default)
– 1: Interface CVBS Output
•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.
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.
9.5.1Pin Assignments and Functionality
Pin assignment of the Tuner:
Table 9-7 Pinning Tuner
Pin Pin DescriptionDC Voltages
1RF-AGC4V for Maximum Gain < 4V for Strong Signal
2FM Radio Input or N.C-
3NC (Address Pin)-
4SCL0 to 3.3 V_dc
5SDA0 to 3.3 V_dc
6/7 Supply Voltage5 V_dc +/- 0.25 V
8N.C-
9Tuning Supply Voltage30 to 35 V_dc
10 FM Radio IF Output/Ground -
11 TV IF Output-
The table below shows the switching behavior of SAW filter.
Table 9-8 Switching behavior SAW filter
Condition
HighLow
SystemMBG/DK/I/L
Condition
Note: The logic level is measured at the base of transistor
7001.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 79L04A AB9.
9.5.2 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
– Bit 4: OP_BLUEMUTE
– 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.
9.6.1 Options
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: OP_AV1
– Bit 6: OP_AV2
– Bit 5: OP_AV3
– Bit 4: OP_CVI
– Bit 3: OP_SVHS2
– Bit 2: OP_YPbPr
– Bit 1: OP_NTSC_PLAYBACK
–Bit 0:
For more detail on the option settings, please refer to the
chapter 8 “Alignments”.
9.6.2 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:
•AV1 Input assigned to Audio In 5.
•AV2 Input assigned to Audio In 3.
•Side AV Input assigned to Audio In 4.
•External Interface Input assigned to Audio In 2.
•Monitor Output assigned to SCART Output (S).
•SCART2 Output (EU) or Monitor Output (LA/NA/AP)
assigned to Headphone Output (HP).
•Main Output assigned to Loudspeaker Output (LS).
9.6.3 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.
9.7Video Processing
The Video Processor is basically the Hercules. Video
processing is done such as the Brightness Control, Contrast
Control and so on.
Some features:
•Full YUV-loop interface (alternative functions: DVD, RGB
or Y/C).
•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).
9.7.1Features
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).
9.7.2Block Diagram
Following diagram is the block diagram of the video processing
part:
NVM
2021
TUNER
VIDEO
SAW
AUDIO
SAW
2425
29,30
95,94,80,79,
78,77,76,75,
74,73,72,71,70
HERCULES
86,81,
67,66
CVBS/AUDIO
REAR/SIDE
INPUT/OUTPUT
68,69
MONITOR
OUT
Figure 9-6 Video processing block diagram
9.7.3Options
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: OP_SC
– 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,
42,4344
49,50,51
AUDIO
AMP
CRT
RGB/CVI
INPUT
E_14770_054.eps
010904
EN 80L04A AB9.
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
–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”.
9.7.4 2fh video processing
The DPTV SVP is a video processor for a wide range of
applications. In this application it functions as scan rate
converter. It can handle the standard video display source(1fH)
of either CVBS or YPbPr and High definition video display
source of 1920/1080i in 2fH. The scan rate conversion from 1fH
to 2fH in interlace or progressive scanning format is performed
at the scaling part of SVP chip. The SVP also perform NTSC/
PAL/SECAM video decoding function, but this is not used.
Basically, 3 output display format has been selected to match
with our 31.25/31.50 KHz CRT deflection system design. There
are 1080i/50Hz,625i/100Hz and 480p/60Hz
9.7.5 OSD insertion
Since this is a 2fh chasis the OSD is inserted at the TDA9332
(HOP). For this a seperate OSD generator is used the
MTV030. It is a I2C controlled device and is suitable for line
frequencies upto 150KHz.
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.
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.
All the features stated are available for the Full Stereo versions
and limited features for the AV Stereo
9.8.3Audio 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 9-9 Pinning overview TDA2616
Pin Pin NameNormal Operation
1 Input LeftInput AC signal
2 Mute16 V_dc
3Ground0 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
9.8.1 Diversity
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.
Since this is a China only chassis the AP sound systems will be
discussed.
For AP, the standard consists of BG/DK/I/M for a Multi-System
set. The diversity here will then depends on the region. AP
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).
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
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
HOPHigh-End video Output Processor
HPHeadphone
IMonochrome TV system. Sound
carrier distance is 6.0 MHz
I2CIntegrated IC bus
IFIntermediate Frequency
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
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 82L04A AB9.
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 T, DPTV SVP (IC7201)
BLOCK DIAGRAM
Circuit Descriptions, List of Abbreviations, and IC Data Sheets