PHILIPS TC8.1L CA Service Manual

Color Television Chassis

TC8.1L

CA

H_17630_000.eps

271107

Contents Page

1. Technical Specifications, Connections, and Chassis
Overview 2

2. Safety Instructions, Warnings, and Notes 3

3. Directions for Use 4

4. Mechanical Instructions 5

5. Service Modes, Error Codes, and Fault Finding 7

6. Block Diagrams, Test Point Overview, and

Waveforms

Block Diagram Mono Carrier 13

7. Circuit Diagrams and PWB Layouts
Mono Carrier (A) 14 15-16
CRT Panel (B) 17 17
BTSC Panel (BTSC) 18 18
Side AV & I/O Panel (D) 19 19

8. Alignments 21

9. Circuit Descriptions, Abbreviation List, and IC Data
Sheets 24
Abbreviation List 30

10. Spare Parts List 31

11. Revision List 34

©

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 0771 BU CD Customer Service Printed in the Netherlands Subject to modification EN 3122 785 17630

EN 2 TC8.1L CA1.

Technical Specifications, Connections, and Chassis Overview

1. Technical Specifications, Connections, and Chassis Overview

Index of this chapter:

1.1 Technical Specifications

1.2 Side and Rear Connections

1.3 Chassis Overview

Notes:

• Figures can deviate due to the different set executions.

• Specifications are indicative (subject to change).

1.1 Technical Specifications

1.1.1 Vision

Display type : CRT, Pure Flat
Screen size : 21” (55 cm), 4:3
Tuning system : PLL
Presets/channels : 181
Tuner bands : Full-Cable
TV color systems : NTSC-M (3.58+4.5)
Video playback : NTSC, PAL
Aerial input : 75 ohm, IEC-type

1.1.2 Sound

Sound systems : Stereo BTSC

: Stereo SAP

Maximum power (W

1.1.3 Miscellaneous

Power supply:

- Mains voltage (V

- Mains frequency (Hz) : 50 / 60

Ambient conditions:

- Temperature range (°C) : +5 to +40

- Maximum humidity : 90% R.H.

):2 × 5

RMS

) : 100 - 240

AC

1.2 Side and Rear Connections

Figure 1-1 Rear and Side I/O connections

Note: The following connector color abbreviations are used

(acc. to DIN/IEC 757): Bk= Black, Bu= Blue, Gn= Green, Gy=
Grey, Rd= Red, Wh= White, and Ye= Yellow.

1.2.1 Rear I/O Connections

Cinch: Video YPbPr - In

Gn - Video Y 1 V
Bu - Video Pb 0.7 V
Rd - Video Pr 0.7 V

Cinch: Video CVBS - In, Audio - 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

Cinch: Video CVBS - Out, Audio - Out

Ye - Video (CVBS) 1 V_pp / 75 ohm kq
Wh - Audio - L 0.5 V_rms / 10 kohm kq
Rd - Audio - R 0.5 V_rms / 10 kohm kq

/ 75 ohm jq

PP

/ 75 ohm jq

PP

/ 75 ohm jq

PP

OPTIONAL

H_17630_014.eps

271107

Power consumption (values are indicative)

- Normal operation (W) : ≈ 84 (/85)
: ≈ 74 (/44)

- Stand-by (W) : < 7

Dimensions (W × H × D mm) : 594 × 458 × 486

Weight (kg) : 21.6

1.3 Chassis Overview

CRT PANEL

B

SIDE AV PANEL +

D

HEADPHONE

Aerial In

- IEC-type Coax, 75 ohm D

1.2.2 Side I/O Connections (optional)

AV 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

MONO CARRIER

BTSC PANEL

BTSC

H_17130_039.eps

291107

A

Figure 1-2 PWB/CBA locations (depending on model)

Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

EN 3TC8.1L CA 2.

Index of this chapter:

2.1 Safety Instructions

2.2 Maintenance Instructions

2.3 Warnings

2.4 Notes

2.1 Safety 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.

2.2 Maintenance 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.

2.3 Warnings

• 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

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.

2.4 Notes

2.4.1 General

• Measure the voltages and waveforms with regard to the
chassis (= tuner) ground (H), or hot ground (I), depending
on the tested area of circuitry. The voltages and waveforms
shown in the diagrams are indicative. Measure them in the
Service Default Mode (see chapter 5) with a color bar
signal and stereo sound (L: 3 kHz, R: 1 kHz unless stated
otherwise) and picture carrier at 475.25 MHz for PAL, or

61.25 MHz for NTSC (channel 3).

• Where necessary, measure the waveforms and voltages
with (D) and without (E) aerial signal. Measure the
voltages in the power supply section both in normal
operation (G) and in 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.

). Discharge

DC

E_06532_007.eps

250304

EN 4 TC8.1L CA3.

Directions for Use

2.4.2 Schematic Notes

• All resistor values are in ohms, and the value multiplier is
often used to indicate the decimal point location (e.g. 2K2
indicates 2.2 kohm).

• Resistor values with no multiplier may be indicated with
either an “E” or an “R” (e.g. 220E or 220R indicates 220
ohm).

• All capacitor values are given in micro-farads (μ= × 10
nano-farads (n= × 10

-9

), or pico-farads (p= × 10

• 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.

2.4.3 Lead-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
avoid mixed regimes. If this cannot be avoided, carefully
clear the solder-joint from old tin and re-solder with new tin.

2.4.4 Alternative BOM identification

The third digit in the serial number (example:
BF2A0635000001) indicates the number of the alternative

-12

B.O.M. (Bill Of Materials) that has been used for producing the
specific TV set. In general, 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 suppliers. This will then
result in sets which have the same CTN (Commercial Type
Number; e.g. 28PW9515/12) but which have a different B.O.M.
number.
By looking at the third digit of the serial number, one can

-6

),

).

identify which B.O.M. is used for the TV set he is working with.
If the third digit of the serial number contains the number “1”
(example: BF1A063500001), then the TV set has been
manufactured according to B.O.M. number 1. If the third digit is
a “2” (example: BF2A0635000001), then the set has been
produced according to B.O.M. no. 2. 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.

Identification: The bottom line of a type plate gives a 14-digit
serial number. Digits 1 and 2 refer to the production center (e.g.
AG is Bruges), digit 3 refers to the B.O.M. code, digit 4 refers
to the Service version change code, digits 5 and 6 refer to the
production year, and digits 7 and 8 refer to production week (in
example below it is 2006 week 17). The 6 last digits contain the
serial number.

MODEL :

PROD.NO:

32PF9968/10

AG 1A0617 000001

MADE IN BELGIUM

220-240V 50/60Hz

~

VHF+S+H+UHF

BJ3.0E LA

S

128W

E_06532_024.eps

130606

Figure 2-2 Serial number (example)

2.4.5 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 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:
http://www.philips.com/support
http://www.p4c.philips.com

4. Mechanical Instructions

Mechanical Instructions

EN 5TC8.1L CA 4.

Index of this chapter:

4.1 Set Disassembly

4.2 Assy / Board Removal

4.3 Service Positions

4.4 Set Re-assembly

Note: Figures below can deviate slightly from the actual
situation, due to the different set executions.

4.1 Set Disassembly

Follow the disassemble instructions in described order.

4.1.1 Rear Cover Removal

Warning: disconnect the mains power cord before you remove

the rear cover.

1. Remove all the fixation screws of the rear cover [1] and [2].

2. Now, pull the rear cover backwards and remove it.

1

4.2 Assy / Board Removal

Sometimes, it can be necessary to swap a complete assy or
Printed Wiring Board (PWB). How that can be done is
explained below.

4.2.1 Side IO/Keyboard Panel Removal

1. Remove the fixation screws [3].

2. Remove the module from the TV.

1

3

1

1

1

Figure 4-1 Rear Cover removal (SL5 styling)

2

2

H_17130_036.eps

1

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H_17130_040.eps

Figure 4-2 Side-IO/Keyboard panel removal (SL5 styling)

070507

EN 6 TC8.1L CA4.

s

4.2.2 Mono Carrier Removal

1. First, disconnect the strain relief of the AC power cord [4].

2. Disconnect all the necessary cables [5].

3. To remove the Mono Carrier; release the clamps [6] and
slide the whole panel backwards [7] (= away from the
front).

4. Slide the panel away from the cabinet.

Mechanical Instructions

14

4.3 Service Positions

Figure 4-6 Mono carrier removal [4/4]

H_17130_023.eps

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Figure 4-3 Mono carrier removal [1/4]

15

Figure 4-4 Mono carrier removal [2/4]

H_17130_025.ep

H_17130_026.eps

For easy measurements, you can use the following service
position.

4.3.1 Service Position Mono Carrier

Removing cables and repositioning the panel

For better accessibility of the Mono Carrier, do the following
(see next figure):

1. If necessary, disconnect some cables, and move the panel
somewhat to the left. Then flip it 90 degrees with its
components towards the CRT.

16

Figure 4-5 Mono carrier removal [3/4]

16

H_17130_027.eps

H_17130_024.eps

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Figure 4-7 Service position Mono Carrier

17

4.4 Set 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 relief is replaced in its
correct position and that it will function correctly!).

• All wires/cables are returned in their original positions.

Service Modes, Error Codes, and Fault Finding

5. Service Modes, Error Codes, and Fault Finding

EN 7TC8.1L CA 5.

Index of this chapter:

5.1 Service Modes

5.2 Error Codes

5.3 Fault Finding

5.1 Service Modes

For an explanation of the Factory Mode, see chapter 8
“Alignments”.

5.2 Error Codes

Not applicable for this chassis.

5.3 Fault Finding

5.3.1 No Picture, No Sound, No Raster, Fuse Broken

No Picture, no sound, no raster, Fuse Broken

Is D833+

(B+)

Shorted to

earth?

YES

Check

(B+)

C of Q402

NO

Is D of Q801

NO

Shorted to

to earth?

YES

Check

Q801

Figure 5-1 Flow chart “No Picture, No Sound, No Raster, Fuse Broken”.

Is D801-

D804

OK?

YES

Check
IC 801

NO

Replace

D801-D804

H_17130_010.eps

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EN 8 TC8.1L CA5.

5.3.2 No Picture, No Sound, No Raster, B+ OK

No Picture, no sound, no raster, B+ OK

Service Modes, Error Codes, and Fault Finding

Check

5V supply

pin 9 of IC 201

OK?

No

Is IC201

Pin9 shorted to

earth ?

No

Check

+5V,+9V Circuit

Figure 5-2 Flow chart “No Picture, No Sound, No Raster, B+ OK”.

5.3.3 No Picture, Raster and Sound OK

Yes

Check
H out waveform
Pin 13 of IC 201

OK?

Yes

Check
waveform
C of Q401

OK?

Yes

oNoN

Yes

Replace

IC 201

Replace

Q401or R401

No Picture, Raster & Sound OK

Check
waveform
C of Q402

OK?

No

Replace

Q402

H_17130_011.eps

070507

Check RGB O/P

Pin 49,50,51,52

of IC 201 OK?

Yes

Check

RGB drive O/P

Q501, Q502 &

Q503

No

Is Pin ,50,51,52

shorted to

earth?

No

Check

9 volt Supply

& Q208

Yes

Replace

IC 201

Figure 5-3 Flow chart “No Picture, Raster and Sound OK”.

H_17130_012.eps

070507

5.3.4 Picture OK, No Sound

Service Modes, Error Codes, and Fault Finding

Picture OK, No sound

EN 9TC8.1L CA 5.

Check Vcc

Pin 13 of IC601

OK?

Yes

Check Vol

Pin 3 & Mute Pin10 of IC601 OK?

Yes

Check audio O/P

R & L of IC 601

OK?

No

Check audio I/P
R & L of IC 601

OK?

Yes

Replace

IC 601

No

Yes

R & L speaker

No

Pin31wave of

Check IF circuit

Figure 5-4 Flow chart “Picture OK, No Sound”.

Check +22v

Circuit

Check

Check

IC201 OK?

No

or Replace

IC201

NO

Check

Q624,Q625,Q093 is

OK?

Yes

Check

Pin 59 of IC 201

Yes

Check

BTSC

Module(IC1001)

OK?

Change the damage

component

or Replace BTSC Module

No

No

Change the

damaged

component

H_17630_015.eps

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5.3.5 No Color

Local system

Colour

system is

Right?

No

Reset

To

Yes

Dose the TV

signal too

weak?

Check

Tuner Input

cable & antenna

Figure 5-5 Flow chart “No Color”.

No colour

YES

NO

Check

Pin 6 & 7 of

IC 201 OK?

YES

Check

Pin 47 of IC

201

NO

Check

X001, C021

& C022

H_17130_014.eps

070507

EN 10 TC8.1L CA5.

5.3.6 One Horizontal Line

Service Modes, Error Codes, and Fault Finding

One horizontal line

Check

Deflection yoke

No

Replace

Yoke coil

Terminal OK?

Yes

Check

+24v supply

Pin 2 of IC 301

OK?

No

Check

R405 (Fuse)

D402

Yes

Check

V output

Pin 5 of IC 301

OK?

No

Check

V input

Pin 1 of IC 301

OK?

Yes

Check

R314, C301,

R317,R336, C309

Figure 5-6 Flow chart “One Horizontal Line”.

Check

V output

Pin 16 of IC 201

No

H_17130_015.eps

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5.3.7 Some Waveforms:

Figure 5-7 FBP pin 12 of IC201

Service Modes, Error Codes, and Fault Finding

H_17130_016.eps

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Figure 5-10 Q815 drain when stand-by

EN 11TC8.1L CA 5.

H_17130_021.eps

240407

Figure 5-8 H_out pin 13 of IC201

Figure 5-9 Q402 C

H_17130_017.eps

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H_17130_020.eps

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Figure 5-11 Q815 drain

H_17130_022.eps

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