Philips 32PF9968/10, 27PT9007D Schematic
Color Television Chassis
TC7.1U
CA
H_17090_000.eps
150307
Contents Page
1. Technical Specifications, Connections, and Chassis
Overview 2
2. Safety Instructions, Warnings, and Notes 4
3. Directions for Use 5
4. Mechanical Instructions 6
5. Service Modes, Error Codes, and Fault Finding 9
6. Block Diagrams, Test Point Overview, and
Waveforms
Block Diagram Mono Carrier 13
Block Diagram ATSC Module 14
7. Circuit Diagrams and PWB Layouts
Mono Carrier (A) 15 16-17
CRT Panel (B) 18 16-17
ATSC: Power Reset (C1) 19 26-27
ATSC: Tuner Link (C2) 20 26-27
ATSC: Audio Video (C3) 21 26-27
ATSC: Embedded (C4) 22 26-27
ATSC: DDR Memory (C5) 23 26-27
ATSC: Flash Memory (C6) 24 26-27
ATSC: Power GND (C7) 25 26-27
Side AV & Control Panel (D) 28 28
Front Control Panel (E) 29 29
8. Alignments 31
9. Circuit Descriptions, Abbreviation List, and IC Data
Sheets 35
Abbreviation List 38
10. Spare Parts List 39
11. Revision List 42
©
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 0772 BU CD Customer Service Printed in the Netherlands Subject to modification EN 3122 785 17091
EN 2 TC7.1U 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, Real Flat
Screen size : 27” (69 cm), 4:3
Tuning system : PLL
Presets/channels : 181
Tuner bands : Full-Cable
TV color systems : ATSC
Video playback : NTSC
Aerial input : 75 ohm, F-type
Cable : Unscrambled Digital
1.1.2 Sound
Sound systems : Stereo BTSC
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.
Power consumption (values are indicative)
- Normal operation (W) : ≈ 120
- Stand-by (W) : < 1
):2 x 2
RMS
) : 108-132
AC
:NTSC
Cable -QAM
1.2 Side and Rear Connections
Figure 1-1 Side and rear I/O connections
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.
1.2.1 Side Connections
Audio / Video In
Ye - Video (CVBS) 1 V_pp / 75 ohm jq
Wh - Audio - L 0.2 V_rms / 10 kohm jq
Rd - Audio - R 0.2 V_rms / 10 kohm jq
S-Video
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
1.2.2 Rear Connections
CVI (YPbPr In)
Gn - 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
Wh - Audio - L 0.5 V_rms / 10 kohm jq
Rd - Audio - R 0.5 V_rms / 10 kohm jq
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Dimensions (WxHxD inch) : 29.2 x 23 x 19.1
Weight (lb) : 94.8
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
AV 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
Aerial In
- F-type Coax, 75 ohm D
Technical Specifications, Connections, and Chassis Overview
1.3 Chassis Overview
CRT PANEL
B
SIDE AV PANEL +
D
HEADPHONE
EN 3TC7.1U CA 1.
C1
C2
C3
C4
C5
C6
C7
POWER RESET
TUNER LINK
AUDIO VIDEO
EMBEDDED
DDR MEMORY
FLASH MEMORY
POWER GROUND
ATSC PANEL
Figure 1-2 PWB/CBA locations
FRONT CONTROL PANEL
MONO CARRIER
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EN 4 TC7.1U 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
2.1 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 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.
). Discharge
DC
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Directions for Use
EN 5TC7.1U CA 3.
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= x10
nano-farads (n= x10
-9
), or pico-farads (p= 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.
2.4.3 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
EN 6 TC7.1U CA4.
Mechanical Instructions
4. Mechanical Instructions
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.
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.
3. If necessary, release the two fixation clamps [4] at the
underside of the panel, and lift the button frame from the
panel.
3
1
222
Figure 4-1 Rear Cover removal
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2
1
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Figure 4-3 Side-IO/Keyboard panel removal
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3
Figure 4-2 Rear Cover fixation screws
H_17090_023.eps
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H_17090_025.eps
Figure 4-4 Side-IO/Keyboard module fixation screws
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4
Figure 4-5 Button frame removal
4.2.2 ATSC Panel Removal
1. Pull the fixation clamp upwards [5].
2. At the same time, slide the module backwards [6], away
from the CRT.
3. To remove the panel from its bracket, remove fixation
screw [7] and pull away fixation brackets [8]. Lift the panel
from the bracket, it hinges at the underside.
When defective, replace the whole module.
6
Mechanical Instructions
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5
4.2.3 Mono Carrier Removal
1. First, disconnect the strain relief of the AC power cord [9].
2. Disconnect all the necessary cables.
3. To remove the Mono Carrier; slide the whole panel
backwards [10] (= away from the front). When stopped, pull
it upwards [11] at the front corners of the bracket (towards
the CRT), and at the same time, move it away from the
CRT [12].
9
Figure 4-8 Mono carrier removal [1/2]
12
11
10
12
EN 7TC7.1U CA 4.
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11
10
Figure 4-6 ATSC panel removal [1/2]
7
8
H_17090_027.eps
Figure 4-7 ATSC panel removal [2/2]
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Figure 4-9 Mono carrier removal [2/2]
4.2.4 IR/LED Panel Removal
1. Remove the fixation screws [13].
2. Remove the module from the TV.
13
Figure 4-10 IR/LED panel removal
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EN 8 TC7.1U CA4.
4.3 Service Positions
For easy measurements, you can use the following service
position.
4.3.1 Service Position Mono Carrier
Removing cables and repostioning the panel
For better accessibility of the Mono Carrier, do the following
(see Figure “Service position”):
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 [14].
Mechanical Instructions
Figure 4-11 Service position
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 postioned 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.
14
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Service Modes, Error Codes, and Fault Finding
5. Service Modes, Error Codes, and Fault Finding
EN 9TC7.1U 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 Can Not Power “On”
Can not Power
On
Fuse OK?
Y
N
Check B+ Ok?
Y
Check the
+5VSTand +12V
Check Horizontal Scan
circuit: Check H-Vcc
and H-out of IC200
Check Q401, T401 and
Q411
Is it IC801 Pin 1
shorted to earth?
N
Y
Check/Replace
IC801
(1) Check if B+ shorted to earth.
(2) To check whether D820 are turnoff. And whether C823
shorted.
N
(3) To check whether Q823 and Q822 are working normally.
1.check the power supply of IC200 is ok?
2.Is Q080,Q081 are working normally?
3. Q821, Q825, IC090 IC201/IC202 are working ok?
Is DB801 OK?
N
Y
Replace DB801
Check the components such as
N
C801, C802, C806, C807
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Figure 5-1 Flow chart “Can not power on”.
EN 10 TC7.1U CA5.
5.3.2 No Raster, Sound OK
Service Modes, Error Codes, and Fault Finding
No Raster
Sound OK
Is the power supply
of Q403 ok?
N
To check whether R404,
C405, D409ˈT401, Q403,
R422 /R421 are ok?
Figure 5-2 Flow chart “No Raster, Sound OK”.
5.3.3 No TV (NTSC) Picture, No Sound, Raster OK
Raster OK, No
Sound , No TV
picture (NTSC)
Check Pin 67 (H-
Y
OUT) voltage ok?
Is there any shorted
in the scan part of the
Change IC200
circuit?
Check each output
Y
voltage of FBT
N
Change the shorted
Y
part.
N
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Is the antenna feed line
or the adapter broken?
Y
Handing the antenna
fault
Check the wave of
pin24/pin25 on IC200 is
N
ok?
Check the power
supply pin15 and RFAGC on IC200 is ok?
Change IC200
Y
N
Check Z100,Q101
ok?
Y
Check tuner power-
supply 33v/5v is ok?
Y
Check tuner RF-
AGC/SCL/SDA is
ok?
N
Check Q105,
Q103/Q102 ,Q104
is ok?
Y
Change the failing
components
Y
Y
Y
Figure 5-3 Flow chart “No TV (NTSC) Picture, No Sound, Raster OK”.
Change the failing
components
Check the power
supply circuit
Change the tuner
Change IC200
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Service Modes, Error Codes, and Fault Finding
5.3.4 No AV Picture, Sound OK, Raster OK
Raster OK,
Sound OK, No
AV picture
EN 11TC7.1U CA 5.
Is the signal waveform at
Pin55 and Pin58 of IC200
right?
Y
Replace the fail
component.
Figure 5-4 Flow chart “No AV Picture, Sound OK, Raster OK”.
5.3.5 No TV (ATSC) Picture, No Sound, Raster OK
Raster OK, No
Sound , No TV
picture (ATSC)
Is the antenna feed
line or the adapter
broken?
N
Is the power supply
N
N
Check the power
supply of digital
board is ok?
Y
+5V,+33V of
tuner is ok
To check whether
D901, C918, C915 and
D906,C231are ok?
Check the power
circuit or replace
another digital BD
N
Check the power
circuit or replace
the tuner
N
Change the failing
component
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Handing the antenna
fault
YY
Check SCL/SDA of
the tuner is ok?
N
Check
Q102/Q103/Q104 is
ok?
N
Check the IC200
pin106/ok?
N
Check or change
IC200
Y
Y
N
Is the signal at
pin20,pin21 ,pin18
of tuner ok?
N
Check Q105 or
replace the tuner
Check pin98 of
IC200
Check or replace a
Y
Check or replace a
digital board
Y
digital board
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Figure 5-5 Flow chart “No TV (ATSC) Picture, No Sound, Raster OK”.
EN 12 TC7.1U CA5.
5.3.6 Some Waveforms:
Figure 5-6 Pin 66 of IC200
Service Modes, Error Codes, and Fault Finding
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Figure 5-10 Pin 1 of IC801
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Figure 5-7 H_out pin 67 of IC200
Figure 5-8 Q405 C
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Figure 5-11 V_out pin 23 of IC200
Figure 5-12 V_out pin 5 of IC301
5.3.7 Important Voltages Overview
P/N Position Normal (V) Standby (V)
1 B+ Joint of L801 and R826A 130.9 9.3
2 Joint of C834 and D831 12.8 0.8
3 Joint of L212 and C090 5 1.2
4 Pin99 of IC200 3.6 0.1
5 Joint of D281 and R284 24.5 0
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Figure 5-9 Pin 1 of IC801 when stand-by
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Block Diagrams, Test Point Overview, and Waveforms
6. Block Diagrams, Test Point Overview, and Waveforms
Block Diagram Mono Carrier
13TC7.1U CA 6.
54321
6
FSS TUNER
VIF/SIF
Ac in
SAW
D
AGC IN
Stb P1.1 99
MAIN
Power
Suply
12V
+B (130V)
13V(Audio)
D
5V
5V (ST)
3.3V(ST)
5V 33V
P900 REAR
AV OUTPUT
P902
C
REAR AV IN
P901/P903
REAR AV IN
S-SHS IN
P960/P905
SIDE AV IN
SIDE SVHS IN
B
31 AGC OUT
36 A-OUTSL
37 A-OUTSR
48 SVO
VIF & SIF
53 AUDIO INL
54 AUDIO INR
55 CVBS2/Y2
49 AUDIO INL
50 AUDIO INR
51 CVBS4/Y4
52 C4
56 AUDIO INL
57 AUDIO INR
58 CVBS3/Y3
59 C2/C3
IO PORT
Color
Decoder
Micro
CC V-CHIP
POWER
YUV
Procrssor
RGB
RGB OUT 85,86,87
ROTATION 113
SVM 65
Jungle
VDRA 23
VDRB 22
E-W 21
RGB
PWM
V+ V-
EW, HD
78 R/PrIN3
P904 REAR
Y Pb Pr IN
24.576MHZ
79 G/YIN3
80 B/PbIN3
PLL
10 XTALIN
11 XTALOUT
I/O Port
120 KEYB
97 IR P0.5
103 LED P0.3
A
DSP
D
Stereo
C
BTSC
109 SDA P1.7
108 SCL P1.6
AUDIO
OUT
RGB Amp
Rot Amp
VM
Pin out
H-drive
H-out
Feedback
AUDIO AMP
C
H,V-out
B
Hout
FBT
L
R
A
IR
Key buttons
1234 65
LED
NVM
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A
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