Philips LC4.2U AA Diagram
IMPORTANT SAFETY NOTICE
Proper service and repair is important to the safe, reliable operation of all Philips
Consumer Electronics Company** Equipment. The service procedures recommended by
Philips and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed
for the purpose. The special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES
which should be carefully read in order to minimize the risk of personal injury to service
personnel. The possibility exists that improper service methods may damage the
equipment. It also is important to understand that these CAUTIONS and NOTICES
ARE NOT EXHAUSTIVE. Philips could not possibly know, evaluate and advise the
service trade of all conceivable ways in which service might be done, or of the possible
hazardous consequences of each way. Consequently, Philips has not undertaken any such
broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is
not recommended by Philips must first satisfy himself thoroughly that neither his safety
nor the safe operation of the equipment will be jeopardized by the service method
selected.
** Hereafter throughout this manual, Philips Consumer Electronics Company will be
referred to as Philips.
WARNING
Critical components having special safety characteristics are identified with a or
"S" by the Ref. No. in the parts list and enclosed within a broken line* (where
several critical components are grouped in one area) along with the safety symbol
on the schematics or exploded views. Use of substitute replacement parts which
do not have the same specified safety characteristics may create shock, fire, or other
hazards. Under no circumstances should the original design be modified or altered
without written permission from Philips. Philips assumes no liability, express or
implied, arising out of any unauthorized modification of design. Servicer assumes all
liability.
* Broken Line ____ _ ____ _ ____ _ ____
FIRE AND SHOCK HAZARD
1. Be sure all components are positioned in such a way as to avoid the possibility of adjacent component
shorts. This is especially important on those chassis which are transported to and from the service shop.
2. Never release a repaired unit unless all protective devices such as insulators, barriers, covers, strain
reliefs, and other hardware have been installed in accordance with the original design.
3. Soldering and wiring must be inspected to locate possible cold solder joints, solder splashes, sharp solder
points, frayed leads, pinched leads, or damaged insulation (including the ac cord). Be certain to remove
loose solder balls and all other loose foreign particles.
4. Check across-the-line components and other components for physical evidence of damage or
deterioration and replace if necessary. Follow original layout, lead length, and dress.
5. No lead or component should touch a receiving tube or a resistor rated at 1 watt or more. Lead tension
around protruding metal surfaces or edges must be avoided.
6. Critical components having special safety characteristics are identified with an 'S' by the Ref. No. in the
parts list and enclosed within a broken line* (where several critical components are grouped in one area)
along with the safety symbol on the schematic diagrams and /or exploded views.
7. When servicing any unit, always use a separate isolation transformer for the chassis. Failure to use a
separate isolation transformer may expose you to possible shock hazard, and may cause damage to
servicing instruments.
8. Many electronic products use a polarized ac line cord (one wide pin on the plug). Defeating this safety
feature may create a potential hazard to the servicer and the user. Extension cords which do not
incorporate the polarizing feature should never be used.
9. After reassembly of the unit, always perform an ac leakage test or resistance test from the line cord to all
exposed metal parts of the cabinet. Also, check all metal control shafts (with knobs removed), antenna
terminals, handles, screws, etc., to be sure the unit may be safely operated without danger of electrical
shock.
* Broken line ____ _ ____ _ ____ _ ____
LEAKAGE CURRENT COLD CHECK
1. Unplug the ac line cord and connect a jumper between the two prongs of the plug.
2. Turn on the power switch.
3. Measure the resistance value between the jumpered ac plug and all exposed cabinet parts of the receiver,
such as screw heads, antennas, and control shafts. When the exposed metallic part has a return path to the
chassis, the reading should be between 1 megohm and 5.2 megohms. When the exposed metal does not
have a return path to the chassis, the reading must be infinity. Remove the jumper from the ac line cord.
LEAKAGE CURRENT HOT CHECK
1. Do not use an isolation transformer for this test. Plug the completely reassembled receiver directly into
the ac outlet.
2. Connect a 1.5k, 10W resistor paralleled by a 0.15uF. capacitor between each exposed metallic cabinet
part and a good earth ground such as a water pipe, as shown below.
3. Use an ac voltmeter with at least 5000 ohms/volt sensitivity to measure the potential across the resistor.
4. The potential at any point should not exceed 0.75 volts. A leakage current tester may be used to make
this test; leakage current must not exceed 0.5mA. If a measurement is outside of the specified limits,
there is a possibility of shock hazard. The receiver should be repaired and rechecked before returning it
to the customer.
5. Repeat the above procedure with the ac plug reversed. (Note: An ac adapter is necessary when a
polarized plug is used. Do not defeat the polarizing feature of the plug.)
OR
With the instrument completely reassembled, plug the ac line cord directly into a 120Vac outlet. (Do not
use an isolation transformer during this test.) Use a leakage current tester or a metering system that
complies with American National Standards Institute (ANSI) C101.1 Leakage Current for Appliances and
Underwriters Laboratories (UL) 1410, (50.7). With the instrument ac switch first in the on position and
then in the off position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed
metal parts of the instrument (antennas, handle brackets, metal cabinet, screw heads, metallic overlays,
control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis.
Any current measured must not exceed 0.5mA. Reverse the instrument power cord plug in the outlet and
repeat the test. See the graphic below.
TV SAFETY NOTES
SAFETY CHECKS
After the original service problem has been corrected, a complete safety check should be made. Be sure to
check over the entire set, not just the areas where you have worked. Some previous servicer may have left
an unsafe condition, which could be unknowingly passed on to your customer. Be sure to check all of the
following:
Fire and Shock Hazard
Implosion
X-Radiation
Leakage Current Cold Check
Leakage Current Hot Check
Picture Tube Replacement
Parts Replacement
WARNING: Before removing the CRT anode cap, turn the unit OFF and short the HIGH VOLTAGE to
the CRT DAG ground.
SERVICE NOTE: The CRT DAG is not at chassis ground.
IMPLOSION
1. All picture tubes used in current model receivers are equipped with an integral implosion system.
Care should always be used, and safety glasses worn, whenever handling any picture tube. Avoid
scratching or otherwise damaging the picture tube during installation.
2. Use only replacement tubes specified by the manufacturer.
X-RADIATION
1. Be sure procedures and instructions to all your service personnel cover the subject of X-radiation.
Potential sources of X-rays in TV receivers are the picture tube and the high voltage circuits. The
basic precaution which must be exercised is to keep the high voltage at the factory recommended
level.
2. To avoid possible exposure to X-radiation and electrical shock, only the manufacturer's specified
anode connectors must be used.
3. It is essential that the service technician has an accurate HV meter available at all times. The
calibration of this meter should be checked periodically against a reference standard.
4. When the HV circuitry is operating properly there is no possibility of an X-radiation problem. High
voltage should always be kept at the manufacturer's rated value - no higher - for optimum
performance. Every time a color set is serviced, the brightness should be run up and down while
monitoring the HV with a meter to be certain that the HV is regulated correctly and does not exceed
the specified value. We suggest that you and your technicians review test procedures so that HV and
HV regulation are always checked as a standard servicing procedure, and the reason for this prudent
routine is clearly understood by everyone. It is important to use an accurate and reliable HV meter. It
is recommended that the HV reading be recorded on each customer's invoice, which will
demonstrate a proper concern for the customer's safety.
5. When troubleshooting and making test measurements in a receiver with a problem of excessive high
voltage, reduce the line voltage by means of a Variac to bring the HV into acceptable limits while
troubleshooting. Do not operate the chassis longer than necessary to locate the cause of the excessive
HV.
6. New picture tubes are specifically designed to withstand higher operating voltages without creating
undesirable X-radiation. It is strongly recommended that any shop test fixture which is to be used
with the new higher voltage chassis be equipped with one of the new type tubes designed for this
service. Addition of a permanently connected HV meter to the shop test fixture is advisable. The
CRT types used in these new sets should never be replaced with any other types, as this may result in
excessive X-radiation.
7. It is essential to use the specified picture tube to avoid a possible X-radiation problem.
8. Most TV receivers contain some type of emergency "Hold Down" circuit to prevent HV from rising
to excessive levels in the presence of a failure mode. These various circuits should be understood by
all technicians servicing them, especially since many hold down circuits are inoperative as long as
the receiver performs normally.
PICTURE TUBE REPLACEMENT
The primary source of X-radiation in this television receiver is the picture tube. The picture tube
utilized in this chassis is specially constructed to limit X-radiation emissions. For continued Xradiation protection, the replacement tube must be the same type as the original, including suffix letter,
or a Philips approved type.
PARTS REPLACEMENT
Many electrical and mechanical parts in Philips television sets have special safety related
characteristics. These characteristics are often not evident from visual inspection nor can the protection
afforded by them necessarily be obtained by using replacement components rated for higher voltage,
wattage, etc. The use of a substitute part which does not have the same safety characteristics as the
Philips recommended replacement part shown in this service manual may create shock, fire, or other
hazards.
PRODUCT SAFETY GUIDELINES FOR ALL PRODUCTS
CAUTION: Do not modify any circuit. Service work should be performed only after you are thoroughly
familiar with all of the following safety checks. Risk of potential hazards and injury to the user increases if
safety checks are not adhered to.
USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING.
PREVENTION OF ELECTROSTATIC DISCHARGE (ESD)
Some semiconductor solid state devices can be damaged easily by static electricity. Such components
commonly are called Electrostatically Sensitive (ES) Devices, Examples of typical ES devices are
integrated circuits and some field-effect transistors and semiconductor "chip" components. The following
techniques should be used to help reduce the incidence of component damage caused by electrostatic
discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain
off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a
commercially available discharging ESD wrist strap, which should be removed for potential shock
reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive
surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "antistatic
(ESD protected)" can generate an electrical charge sufficient to damage ES devices.
5. Do not use Freon propelled chemicals. These can generate electrical charges sufficient to damage ES
devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are
ready to install it (most replacement ES devices are packaged with leads electrically shorted together by
conductive foam, aluminum foil or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch
the protective material to the chassis or circuit assembly into which the device will be installed.
CAUTION: Be sure no power is applied to the chassis or circuit and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless
motion such as the brushing together of your clothes fabric or the lifting of your feet from a carpeted
floor can generate static electricity (ESD) sufficient to damage an ES device.)
NOTE to CATV system Installer:
This reminder is provided to call the CATV system installer's attention to article 820-22 of the NEC that
provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be
connected to the grounding system of the building, as close to the point of cable entry as practical.
PRACTICAL 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 – reactions that are best avoided. Before reaching into the powered color TV set, it is
best to test the high voltage insulation. It is easy to do, and is just a good service precaution.
BEFORE POWERING UP THE TV WITH THE BACK OFF (or on a test fixture), attach a clip lead to
the CRT DAG ground and to a screwdriver blade that has a well insulated handle. After the TV is powered
on and high voltage has developed, probe the anode lead with the blade, starting at the bottom of the High
Voltage Transformer (flyback – IFT). Move the blade to within two inches of the connector of the CRT. IF
THERE IS AN ARC, YOU FOUND IT THE EASY WAY, WITHOUT GETTING A SHOCK! If
there is an arc to the screwdriver blade, replace the High Voltage Transformer or the lead, (if removable)
whichever is causing the problem.
PICTURE TUBE REPLACEMENT PROCEDURE
Note: a. Two (2) people are required to handle this picture tube.
b. Safety Glasses must be worn during this procedure or whenever directly handling a picture tube.
c. Take care in each step not to damage the CRT or the cabinet.
1. Remove the Chassis and the CRT Socket Board Module from the cabinet.
2. A furniture pad or blanket should be positioned on the floor to support only the CRT Face. This pad or
blanket should be high enough to keep the CRT Face approximately 12 to 14 inches off the floor.
3. Using two people, place the cabinet in a front down position with the CRT Face on the pad or blanket.
4. Place padded blocks under each corner of the cabinet to keep it from rocking.
5. Remove the four screws, at the corners of the CRT.
6. With two people lowering the cabinet to the floor, leave the CRT elevated by the pad or blanket.
Note: Take care not to grasp the neck of the CRT during this procedure, as it is extremely fragile.
7. Two (2) people may then lift the CRT from the cabinet.
8. Remove the degaussing coil from the defective CRT and mount on the replacement. Take care to
maintain the exact shape and fit.
To install the new CRT, reverse steps 1 to 7.
Mechanical Instructions
Index of this chapter:
1. Service Position
2. Rear Cover Removal
3. Power Supply Unit Removal
4. TV & Scaler Board Removal
5. I/O Panel Removal
6. Side I/O & Keyboard Panel and Front LED Panel Removal
7. Exchanging the LCD Panel
8. Re-assembly
Note: Figures below can deviate from the actual situation, due to different set
executions.
Note: To diagnose the set with ComPair it is not needed to open the set entirely.
1. Manually unlock and remove the cover cap (1). See figure “TV set rear view”.
2. Break away the protective plate (2) at the I/O panel bracket to get access to the
needed plugs. See figure “Protective plate”.
Figure: Protective plate
Service Position
Figure: TV set rear view
Figure: TV stand removal
1. Carefully pull upwards the cover plate (2) (from its left side) to unlock it (3) and
remove the plate from the stand.
2. Unplug the AC power and the antenna cables.
3. Be sure to remove the coin slotted mounting screw (4) from the stand.
4. Carefully lift the TV from the swivel base (it uses a vertical sliding mechanism).
5. Place the TV upside down on a tabletop (use a protection sheet or foam bars). Take
care, that this is flat and free from obstacles like screws, to prevent damaging the
fragile LCD screen.
Foam Bars
Figure: Foam bars
The foam bars (order code 3122 785 90580) can be used for all types and sizes of Flat
TVs. By laying the plasma or LCD TV flat on the (ESD protective) foam bars, a stable
situation is created to perform measurements and alignments. By placing a mirror under
the TV, you can easily monitor the screen.
Rear Cover Removal
Figure: Rear cover removal
1. Manually unlock and remove the top cover cap (5). See Figure: “TV set rear view”.
2. Make sure all power-, audio-, video- and coax- cables are unplugged.
3. Remove all Torx screws (1) around the edges of the rear cover.
4. Remove the four silver coloured Torx screws (2) around the stand holder. See figure
“Rear cover removal”.
5. Carefully use a flat screwdriver to release the clamps (3). See figure “Rear cover
removal”.
6. Remove the rear cover and store it in a safe place.
Note: avoid holding the button-area during removal (it can be easily damaged).
Power Supply Unit Removal
Figure: Power supply unit
1. Disconnect all cables from the Power supply unit.
2. Remove all mounting screws (1) from the Power supply unit.
3. Take out the Power supply unit.
TV & Scaler Board Removal
Figure: TV & Scaler board shield removal
Figure: TV & Scaler board removal
1. Disconnect all cables from the TV & Scaler board.
2. Remove all shield mounting screws (1) and remove the shield.
3. Remove the screw from the grounding cable (2).
4. Remove the mounting screw (3) and remove the board.
I/O Panel Removal
Figure: I/O panel removal
1. Release the two clamps (1) at the I/O panel bracket. Carefully pull the bracket in the
direction (2), as shown at the figure “I/O panel removal”, and remove it.
2. Disconnect all cables from the I/O panel.
3. Remove all mounting screws from the I/O panel (3).
4. Take out the I/O panel.
3D Comb Filter Panel Removal
1. Disconnect all cables from the 3D Comb Filter panel.
2. Remove all mounting screws from the 3D Comb filter panel.
3. Take out the 3D Comb filter panel.
Pixel Plus Panel Removal
Figure: Power supply unit
1. Disconnect all cables from the Pixel Plus panel.
2. Remove all mounting screws from the Pixel Plus panel.
3. Take out the Pixel Plus panel.
Side I/O & Keyboard Panel / Front LED Panel Removal
Figure: Side I/O & Keyboard panel and Front LED panel removal
1. Release the clamp (1) and take out the Front LED panel.
2. Disconnect the cable (2) from the Side I/O & Keyboard panel.
3. Remove all mounting screws (3) from the Side I/O & Keyboard panel bracket.
4. Unlock this unit by shifting it to the outside direction of the monitor.
5. Release the clamp (4) and take out the Side I/O & Keyboard panel from the bracket.
Exchanging the LCD Panel
Figure: Exchanging the LCD panel
1. Disconnect all cables from the LCD Panel.
2. Remove all mounting screws (1) from the metal cover.
3. Lift and take off the metal cover.
4. Now you can exchange the LCD panel.
Re-Assembly
To re-assemble the whole set, do all processes in reverse order.
Notes:
l Do not forget to replace the ground cable of the TV & Scaler board, while mounting
the screw at the board topside. See figure “TV & Scaler board shield removal”.
l Make sure the ferrite ring (1) is properly tightened to the clip (this is valid only for 26
inch sets).
Figure: Ferrite ring
Service Modes, Error Codes, and Fault Finding
Index of this chapter:
1. Test Points
2. Service Modes
3. Problems and Solving Tips (related to CSM)
4. ComPair
5. Error Codes
6. The Blinking LED Procedure
7. Fault Finding and Repair Tips
8. Power Supply
Test Points
This chassis is equipped with test points in the service printing. In the schematics test points
are identified with a rectangle box around Fxxx or Ixxx. These test points are specifically
mentioned in the service manual as “half moons” with a dot in the centre.
Perform measurements under the following conditions:
l Television set in Service Default Alignment Mode.
l Video input: Colour bar signal.
l Audio input: 3 kHz left channel, 1 kHz right channel.
Service Modes
Service Default mode (SDM) and 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 chassis.
Minimum requirements for ComPair: a Pentium processor, a Windows OS, and a CD-ROM
drive (see also paragraph 'ComPair').
Service Default Mode (SDM)
Purpose
l To create a predefined setting for measurements to be made.
l To override software protections.
l To start the blinking LED procedure.
l To inspect the error buffer.
l To check the life timer.
Specifications
l Tuning frequency: 61.25 MHz (Channel 3).
l Colour system: NTSC.
l All picture settings at 50% (brightness, colour contrast, hue).
l Bass, treble and balance at 50 %; volume at 25 %.
l All service-unfriendly modes (if present) are disabled. The service unfriendly modes are:
n Timer / Sleep timer.
n Child / parental lock.
n Blue mute.
n Hotel / hospital mode.
n Auto shut off (when no “IDENT” video signal is received for 15 minutes).
n Skipping of non-favourite presets / channels.
n Auto-storage of personal presets.
n Auto user menu time-out.
n Auto Volume Levelling (AVL).
How to enter
To enter SDM, use one of the following methods:
l Press the following key sequence on the remote control transmitter: “062596” directly
followed by the MENU button (do not allow the display to time out between entries while
keying the sequence).
l Short 'Service' jumpers on the TV board during cold start and apply mains (see Figure
'Service jumpers'). Then press the mains button (remove the short after start-up).
Caution: Entering SDM by shorting 'Service' jumpers will override the +8V-protection.
Do this only for a short period. When doing this, the service-technician must know
exactly what he is doing, as it could damage the television set.
l Or via ComPair.
Figure: Service jumpers
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.
Figure: SDM menu
How to navigate
Use one of the following methods:
l When you press the MENU button on the remote control, the set will switch on the normal
user menu in the SDM mode.
l 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 press the 'POWER' switch on the set.
Service Alignment Mode (SAM)
Purpose
l To change option settings.
l To display / clear the error code buffer.
l To perform alignments.
Specifications
l Operation hours counter (maximum five digits displayed).
l Software version, Error codes, and Option settings display.
l Error buffer clearing.
l Option settings.
l AKB switching.
l Software alignments (Tuner, White Tone, Geometry & Audio).
l NVM Editor.
l ComPair Mode switching.
How to enter
To enter SAM, use one of the following methods:
l Press the following key sequence on the remote control transmitter: “062596' directly
followed by the OSD/STATUS button (do not allow the display to time out between entries
while keying the sequence).
l 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.
Figure: SAM menu
Menu explanation
1. LLLLL. This represents the run timer. The run timer counts normal operation hours, but
does not count standby hours.
2. AAABCD-X.Y/EEEEEE F.GG This is the software identification of the main
microprocessor:
n A = the project name (LC42).
n B = the region: E= Europe, A= Asia Pacific, U= NAFTA, L= LATAM.
n C = the software diversity:
n Europe: T= 1 page TXT, F= Full TXT, V= Voice control.
n LATAM and NAFTA: N= Stereo non-dBx, S= Stereo dBx.
n Asian Pacific: T= TXT, N= non-TXT, C= NTSC.
n ALL regions: M= mono, D= DVD, Q= Mk2.
n D = the language cluster number.
n X = the main software version number (updated with a major change that is incompatible
with previous versions).
n Y = the sub software version number (updated with a minor change that is compatible
with previous versions).
n EEEEEE = the scaler sw cluster
n F = the main sw version no.
n GG = the sub-version no.
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. White Tone. Used to align the white tone. See “White Tone” in the Alignments section for a
detailed description.
11. Geometry. Used to align the geometry settings of the television. See “Geometry” in the
Alignments section for a detailed description.
12. Audio. No audio alignment is necessary for this television set.
13. NVM Editor. Can be used to change the NVM data in the television set. See table “NVM
data” further on.
14. SC NVM Editor. Can be used to edit Scaler NVM.
15. ComPaIr. Can be used to switch on the television to In System Programming (ISP) mode,
for software uploading via ComPair. Caution: When this mode is selected without ComPair
connected, the TV will be blocked. Remove the AC power to reset the TV.
How to navigate
l 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.
l With the MENU LEFT/RIGHT keys, it is possible to:
n Activate the selected menu item.
n Change the value of the selected menu item.
n Activate the selected submenu.
l 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.
l When you press the MENU key in while in a submenu, you will return to the previous menu.
How to store SAM settings
To store the settings changed in SAM mode, 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
press the 'POWER' switch on the set.
Customer Service Mode (CSM)
Purpose
The Customer Service Mode shows error codes and information on the TV's operation
settings. The call centre can instruct the customer (by telephone) to enter CSM in order to
identify the status of the set. 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: “123654”
(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:
Figure: CSM menu
Menu explanation
1. Indication of the decimal value of the operation hours counter, Software identification of the
main microprocessor (see 'Service Default or Alignment Mode' for an explanation), and the
service mode (CSM= Customer Service Mode).
2. Displays the last five errors detected in the error code buffer.
3. Displays the option bytes.
4. Displays the type number version of the set.
5. Reserved item for P3C call centres (AKBS stands for Advanced Knowledge Base System).
6. Indicates the television is receiving an 'IDENT' signal on the selected source. If no 'IDENT'
signal is detected, the display will read 'NOT TUNED'
7. Displays the detected Colour system (e.g. PAL/NTSC).
8. Displays the detected Audio (e.g. stereo/mono).
9. Displays the picture setting information.
10. Displays the sound setting information.
How to exit
To exit CSM, use one of the following methods:
l Press the MENU, STATUS/EXIT, or POWER button on the remote control transmitter.
l Press the POWER button on the television set.
Problems and Solving Tips Related to CSM
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:
l The picture improves when you press the AUTO PICTURE button on the remote control
transmitter, or
l 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.
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.
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
Check CSM line 6. If this line reads “Not Tuned”, check the following:
l Antenna not connected. Connect the antenna.
l No antenna signal or bad antenna signal. Connect a proper antenna signal.
l The tuner is faulty (in this case line 2, 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.
4. Press the MENU LEFT/RIGHT keys to enter the PICTURE sub menu.
5. Use the MENU UP/DOWN keys to select COLOUR.
6. Press the MENU RIGHT key to increase the COLOUR 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.
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.
ComPair
Introduction
ComPair (Computer Aided Repair) is a service tool for Philips Consumer Electronics products.
ComPair is a further development on the European DST (service remote control), which allows
faster and more accurate diagnostics. ComPair has three big advantages:
ComPair helps you to quickly 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 defective chassis,
schematics and PWBs are only a mouse click away.
Specifications
ComPair consists of a Windows based faultfinding program and an interface box between PC
and the (defective) product. The ComPair interface box is connected to the PC via a serial or
RS232 cable.
In this chassis, the ComPair interface box and the TV communicate via a bi-directional service
cable via the service connector.
The ComPair faultfinding program is able to determine the problem of the defective television.
ComPair can gather diagnostic information in two ways:
l Automatic (by communication with the television): ComPair can automatically read out 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 micro
controller of the television. In this way, it is possible for ComPair to communicate (read and
write) to devices on the I2C busses of the TV-set.
l Manually (by asking questions to you): Automatic diagnosis is only possible if the micro
controller of the television is working correctly and only to a certain extend. When this is not
the case, ComPair will guide you through the faultfinding tree by asking you questions (e.g.
Does the screen give a picture? Click on the correct answer: YES / NO) and showing you
examples (e.g. Measure test-point I7 and click on the correct waveform you see on the
oscilloscope). You can answer by clicking on a link (e.g., 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 / answer procedure,
ComPair will enable you to find most problems in a fast and effective way.
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