Copyright 2007 Philips Consumer Electronics B.V. Eindhoven, The Netherlands.
All rights reserved. No part of this publication may be reproduced, stored in a
retrieval system or transmitted, in any form or by any means, electronic,
mechanical, photocopying, or otherwise without the prior permission of Philips.
Published by JY 0768 BU CD Customer ServicePrinted in the NetherlandsSubject to modificationEN 3122 785 17460
EN 2SK5.0l CA1.
Technical Specifications, Connections, and Chassis Overview
1.Technical Specifications, Connections, and Chassis Overview
Index of this chapter:
1.1 Technical Specifications
1.2 Connection Overview
1.3 Chassis Overview (Mechanical chassis)
Note: Data below can deviate slightly from the actual situation,
due to the different set executions.
1.1Technical Specifications
1.1.1Vision
Display type: CRT
Screen size: 29” (72 cm), 4:3
Tuning system: PLL
TV Colour systems: NTSC, PAL M, N
Video playback: NTSC,
Presets/channels: 181 channels
Tuner bands: VHF
1.1.2Sound
Sound systems: Stereo, SAP
Maximum power (W
):2 x 5
RMS
1.1.3Miscellaneous
Power supply:
- Mains voltage (V
): 100 - 240
AC
- Mains frequency (Hz): 50 / 60
Ambient conditions:
- Temperature range (°C): -5 to +45
- Maximum humidity: 90% R.H.
: UHF
1.2Connection Overview
Note: The following connector colour abbreviations are used
(acc. to DIN/IEC 757): Bk= Black, Bu= Blue, Gn= Green, Gy=
Grey, Rd= Red, Wh= White, and Ye= Yellow.
1.2.1Rear and Side Connections
Figure 1-1 Rear and Side Connections
Aerial - In
--F-connector Coax, 75 ohm D
Cinch: Video YPbPr - In
Gn -Video Y 1 V
Bu -Video Pb 0.7 V
Rd - Video Pr 0.7 V
Wh -Audio L 0.5 V
Rd - Audio R 0.5 V
Cinch: Video CVBS - In, Audio - In
Ye -Video CVBS 1 V
Wh -Audio L 0.5 V
Rd - Audio R 0.5 V
/ 75 ohm jq
PP
/ 75 ohm jq
PP
/ 75 ohm jq
PP
/ 10 kohm jq
RMS
/ 10 kohm jq
RMS
/ 75 ohm jq
PP
/ 10 kohm jq
RMS
/ 10 kohm jq
RMS
H_17220_035.eps
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Power consumption
- Normal operation (W): ≈ 105
- Stand-by (W): < 3
Cinch: Video CVBS - Out, Audio - Out
Ye -Video CVBS 1 V
Wh -Audio L 0.5 V
Rd - Audio R 0.5 V
/ 75 ohm kq
PP
/10 kohm kq
RMS
/ 10 kohm kq
RMS
Technical Specifications, Connections, and Chassis Overview
1.3Chassis Overview (Mechanical chassis)
CRT BOARD
B
MAINS FILTER
E
CONTROL PANEL
D
EN 3SK5.0l CA1.
Figure 1-2 PWB location
MONO CARRIER
BTSC PANEL
SIDE AV PANEL
A
M
G
POWER SUPPLY
A1
A2
LINE DEFLECTION
A3
FRAME DEFLECTION
A4
TUNER IF
A5
AV SWITCH
A6
TONE CONTROL
A7
AUDIO AMPLIFIER
A8
CPU & DECODER
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EN 4SK5.0l CA2.
Safety Instructions, Warnings, and Notes
2.Safety Instructions, Warnings, and Notes
Index of this chapter:
2.1 Safety Instructions
2.2 Maintenance Instructions
2.3 Warnings
2.4 Notes
2.1Safety Instructions
Safety regulations require the following 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.
•Wear safety goggles when you replace the CRT.
Safety regulations require that after a repair, the set must be
returned in its original condition. Pay in particular attention to
the following points:
•General repair instruction: as a strict precaution, we advise
you to re-solder the solder connections through which the
horizontal deflection current flows. In particular this is valid
for the:
1. Pins of the line output transformer (LOT).
2. Fly-back capacitor(s).
3. S-correction capacitor(s).
4. Line output transistor.
5. Pins of the connector with wires to the deflection coil.
6. Other components through which the deflection current
flows.
Note: This re-soldering is advised to prevent bad connections
due to metal fatigue in solder connections, and is therefore only
necessary for television sets more than two years old.
•Route the wire trees and EHT cable correctly and secure
them with the mounted cable clamps.
•Check the insulation of the Mains/AC Power lead for
external damage.
•Check the strain relief of the Mains/AC Power cord for
proper function, to prevent the cord from touching the CRT,
hot components, or heat sinks.
•Check the electrical DC resistance between the Mains/AC
Power plug and the secondary side (only for sets that 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 prevent touching of any
inner parts by the customer.
2.2Maintenance Instructions
We recommend a maintenance inspection carried out by
qualified service personnel. The interval depends on the usage
conditions:
•When a customer uses the set under normal
circumstances, for example in a living room, the
recommended interval is three to five years.
•When a customer uses the set in an environment with
higher dust, grease, or moisture levels, for example in a
kitchen, the recommended interval is one year.
•The maintenance inspection includes the following actions:
1. Perform the “general repair instruction” noted above.
2. Clean the power supply and deflection circuitry on the
chassis.
3. Clean the picture tube panel and the neck of the picture
tube.
2.3Warnings
•In order to prevent damage to ICs and transistors, avoid all
high voltage flashovers. In order to prevent damage to the
picture tube, use the method shown in figure “Discharge
picture tube”, to discharge the picture tube. Use a high
voltage probe and a multi-meter (position V
until the meter reading is 0 V (after approx. 30 s).
V
E_06532_007.eps
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Figure 2-1 Discharge picture tube
•All ICs and many other semiconductors are susceptible to
electrostatic discharges (ESD w ). Careless handling
during repair can reduce life drastically. Make sure that,
during repair, you are connected with the same potential as
the mass of the set by a wristband with resistance. Keep
components and tools also at this same potential.
•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 prevents circuits
from becoming unstable.
2.4Notes
2.4.1General
•Measure the voltages and waveforms with regard to the
chassis (= tuner) ground (H), or hot ground (I ), depending
on the tested area of circuitry. The voltages and waveforms
shown in the diagrams are indicative. Measure them in the
Service Default Mode (see chapter 5) with a 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.
•Manufactured under license from Dolby Laboratories.
“Dolby”, “Pro Logic” and the “double-D symbol”, are
trademarks of Dolby Laboratories.
). Discharge
DC
Directions for Use
EN 5SK5.0l CA3.
2.4.2Schematic 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.
2.4.3Lead-free Soldering
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 a solder-tip temperature of at least 400°C.
– To stabilize the adjusted temperature at the solder-tip.
– To exchange solder-tips for different applications.
•Adjust your solder tool so that a temperature of around
360°C - 380°C is reached and stabilized 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 increase 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
-9
), or pico-farads (p= x10
-12
avoid mixed regimes. If this cannot be avoided, carefully
clear the solder-joint from old tin and re-solder with new tin.
2.4.4Alternative BOM identification
In September 2003, Philips CE introduced a change in the way
the serial number (or production number, see Figure 2-2) is
-6
),
).
composed. From this date on, the third digit in the serial
number (example: AG2B0335000001) indicates the number of
the alternative BOM (Bill of Materials used for producing the
specific model of TV set). It is possible that the same TV model
on the market is produced with e.g. two different types of
displays, coming from two different O.E.M.s.
By looking at the third digit of the serial number, the service
technician can see if there is more than one type of B.O.M.
used in the production of the TV set he is working with. He can
then consult the At Your Service Web site, where he can type
in the Commercial Type Version Number of the TV set (e.g.
28PW9515/12), after which a screen will appear that gives
information about the number of alternative B.O.M.s used.
If the third digit of the serial number contains the number 1
(example: AG1B033500001), then there is only one B.O.M.
version of the TV set on the market. If the third digit is a 2
(example: AG2B0335000001), then there are two different
B.O.M.s. Information about this is important for ordering the
correct spare parts!
For the third digit, the numbers 1...9 and the characters A...Z
can be used, so in total: 9 plus 26 = 35 different B.O.M.s can
be indicated by the third digit of the serial number.
2.4.5Practical 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.
3.Directions for Use
You can download this information from the following websites:
Note: Figures below can deviate slightly from the actual
situation, due to the different set executions.
4.1Set Disassembly
Follow the disassemble instructions in described order.
4.1.1Rear Cover Removal
Warning: disconnect the mains power cord before you remove
the rear cover.
1. Remove all the fixation screws of the rear cover.
2. Now, pull the rear cover backwards and remove it.
4.2Assembly / Board Removal
4.2.1Power Switch and Control Panel removal
1. From the mono carrier disconnect the main power and the
keyboard circuit cables. Release the main power cord and
the keyboard circuit cable from it’s strain reliefs.
2. Then, remove the six fixation screws [1] of the power
switch and control panel and remove the board.
Figure 4-1 Rear Cover removal
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H_17230_027.eps
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Figure 4-2 Power Switch and Control Panel removal
4.2.2Side I/O Panel removal
Mechanical Instructions
1
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EN 7SK5.0l CA4.
Figure 4-3 Side-I/O panel removal
1. Disconnect the side panel cable from the mono carrier and
remove the cable from it’s strain reliefs.
2. Then, remove the four fixation screws [1] and remove the
board.
4.3Set Re-assembly
To re-assemble the whole set, do all processes in reverse
order.
Be sure that, before the rear cover is mounted:
•The mains cord is positioned correctly in its guiding
brackets (make sure that the strain reliefs are replaced in
its correct position and that it will function correctly!).
•All wires/cables are returned in their original positions.
EN 8SK5.0l CA5.
Service Modes, Error Codes, and Fault Finding
5.Service Modes, Error Codes, and Fault Finding
Index of this chapter:
5.1 Test Points
5.2 Service Modes
5.3 Error Codes
5.4 Fault Finding
5.1Test Points
See chapter 6 "Block Diagrams, Testpoint Overviews, and
Waveforms".
Perform measurements under the following conditions:
•Service Default Mode.
•Video: colour bar signal.
•Audio: 3 kHz left, 1 kHz right.
5.2Ser vice Modes
This chassis does not contain a specific Service Mode. Service
and Alignment of the TV set can be done via the Factory Mode
by the service technician, see further down in this manual.
5.3Error Codes
Not applicable.
5.4.6Picture not or incorrect Coloured
•Check the circuit from IC201 to R.G.B. three gun circuit.
•Check the IC soldering and relevant circuitry on physical
damage or check for defective capacitors.
5.4.7Picture with Horizontal Bright Line and Sound
Check both supply voltages of vertical IC301 and relevant
circuitry on correctness. Also check the vertical synchronizing
signal from IC201.
5.4.8Remote Control Malfunction
Check the voltage on pin 64 of IC201. The normal value should
be 5.15 V. If this is correct check front control panels soldering
connections. If can't be solved, check the remote control,
crystal or transmitting diode of the remote control are in good
condition.
5.4.9No Sound
Check power supply of sound IC (IC402) and relevant circuitry.
Check as well the BTSC board, check the power supply of
IC801 and relevant output signal pins 21 and 27 of this IC. Do
not exclude IC801 and/or IC402 to be defective. If needed
replace the speakers.
5.4Fault Finding
5.4.1 Power on Failure
Check whether the power supply is working properly and
whether the values of voltages normal. If those are correct,
check line transistor and transformer are working properly or
check fore or back line for defects.
5.4.2Horizontal Deflection Transistor Defective: No Picture, No
Sound.
To find the fault for a defect horizontal deflection transistor
please check the following items:
•Over voltage to breakdown.
•Over current to burn.
•Horizontal frequency too low.
•Horizontal drive inefficient.
5.4.3Picture Interference
•Check if the signal line contact is good.
•Change Tuner if is necessary.
5.4.4Can't find any TV program
Checking method: Check the closed circuit from tuner to
picture decoder IC to detect whether there are defective
components. Or check whether the resistance of R117, R118,
R203 and R204 has increased which also could cause the
problem.
5.4.10 Poor Sound Quality
Check the sound system after searching the channel which
should set at NTSC or AUTO. If still has problem, check
accompany board circuit on chassis good or not.
5.4.5No Good Picture or Double Image
Check the correctness of the signal from IF1/IF2 to Q101 and
relevant circuit. In this case the problem can be Q101 and/or
SAW101.
Block Diagrams, Test Point Overview, and Waveforms
A1
A2
A3
A4
A5
A6
A7
A8
B
M
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6.Block Diagrams, Test Point Overview, and Waveforms
Block Diagram Chassis
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