Page 1
Colour Television Chassis
L9.1A
AA 00.02
5555
In the 21PT3942 and the two new 21” sets, 21PT3956 & 21PT3962,
the mono-carrier PCB-layout L9.1A is introduced to increase the
audio power.
Entering the SDM has changed. By connecting pin 20 to ground at
cold start.
Entering the SAM has changed. Shorting pin M28 and M29 is no
longer valid.
For the 21PT3942 one new panel is added:
• Side AV panel & Headphone (E1)
For the 21PT3956 & 21PT3962 two new panels are added:
• Side AV panel & Headphone (E1)
• Top Control RF (T)
For reference see Service Manual L9.2A - 4822 727 21704.
In the new 34” sets, 34PT4873 & 34PT4822, two new panels are
introduced:
• Side AV panel & Headphone (E1)
• Top Control FSQ (T1)
For reference see Service Manual L9.1A - 4822 727 21705.
©
Copyright 2000 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 RB 0069 Service PaCE Printed in the Netherlands Subject to modification 5 3122 785 40240
Page 2
GB 2 L9.1A
Electrical diagrams and PWB’s
Side AV panel & headphone
123456
SIDE AV PANEL & HEADPHONE
A
B
C
To 0227
0252
of
or
D
VIDEO IN
0250-C
1
2
0250-A
3
4
0250-B
Electrical diagrams and PWB’s
2
RIGHT
LEFT
3
1
8
9
7
5
6
4
9152
RES
SG02
SG04
SG03
6161
2173
2174
RES
RES
3155
BZX79-C6V8
9153
RES
3153
8K2
3152
3151
8K2
3150
75R
10K
10K
2172
2171
330p
330p
9155
(FOR ESD)
0232 E4
0250-A C3
0250-B D3
0250-C B3
0251 C5
0252 D2
0253 B5
0254 E2
0255 E5
A
0261 D5
2171 D4
2172 C4
2173 C4
2174 D4
2176 F3
2177 F3
2178 F3
2179 E3
B
C
D
3150 D4
3151 D4
3152 C4
3153 C4
3155 B4
3156 E3
3157 F3
6161 B3
9152 D3
9153 C4
9155 C5
SG02 B3
SG03 D3
SG04 C3
SG06 F4
SG07 F4
0253
To 0229
0251
0261
of
or
To 0260
of
To 0262
of
3
2
1
1
2
3
1
2
3
4
5
6
E
HEADPHONE
0254
L-
5
L+
GND
4
3
R+
2
R-
1
To
speaker
F
G
2179
2177
100u
100u
*
3156
3157
3156
*
330R
3157
*
330R
EUROPE
330R
330R
330p
2178
330p
2176
AP/INDIA/LATAM
SG07
SG06
120R
120R
1
0232
6
5
4
2
3
7
8
9
0255
4
3
2
1
To
Speakers
L+
L-
R-
R+
To 0217
of
H
CL 06532025_020.eps
310300
E
F
G
H
123456
Page 3
Side AV panel & headphone
Electrical diagrams and PWB’s
GB 3L9.1A
CL 06532025_031.eps
030400
Page 4
GB 4 L9.1A
TOP control panel (RF)
1234
Electrical diagrams and PWB’s
0209 B2
1680 B4
1681 B4
1682 B3
1683 B3
TOP CONTROL PANEL (RF)
A
B
1234
TOP control panel (RF)
To 0256
of
0209
A
KeyBd2
4
KeyBd1’
3
KeyBd3
2
1
1683
CH UP
1682 1681
CH DN VOL UP VOL DN
CL 06532025_023.eps
1680
B
150500
CL 06532025_027.eps
030400
Page 5
TOP control panel (FSQ)
12345
Electrical diagrams and PWB’s
GB 5L9.1A
0209 B2
1680 B5
1681 B4
1682 B4
1683 B3
A
To 0256
B
1234
TOP control panel (FSQ)
TOP CONTROL PANEL (FSQ)
KeyBd2
4
0209
3
2
1
KeyBd1’
KeyBd3
1683
CH UP CH DN VOL UP VOL DN
1682
1681
1680
of
CL 06532025_024.eps
150500
5
A
B
CL 06532025_028.eps
030400
Page 6
GB 6 L9.1A
Spare parts list
[E] Side AV Panel
Various
0021h3139 124 33221 Side AV Bracket
0232
4822 267 31014 Headphone Socket
h
0250 4822 265 11606 3P YKC21-5599
0253 4822 267 10735 Conn. 3P
0254 4822 267 10734 Conn. 5P
0255 4822 267 10565 Conn. 4P
0261 2422 025 12482 Conn. 6P
g
2171 4822 126 13512 330pF 10% 50V
2172 4822 126 13512 330pF 10% 50V
2173 4822 126 13512 330pF 10% 50V
2174 4822 126 13512 330pF 10% 50V
2176 4822 126 13512 330pF 10% 50V
2177 4822 124 40207 100µF 20% 25V
2178 4822 126 13512 330pF 10% 50V
2179 4822 124 40207 100µF 20% 25V
f
3150 4822 050 21003 10k 1% 0.6W
3151 4822 116 52303 8k2 5% 0.5W
3152 4822 050 21003 10k 1% 0.6W
3153 4822 116 52303 8k2 5% 0.5W
3155 4822 116 52201 75Ω 5% 0.5W
3156 4822 116 52219 330Ω 5% 0.5W
3157 4822 116 52219 330Ω 5% 0.5W
Spare parts list
d
6161 4822 130 34278 BZX79-B6V8
[T] Top Control Panel (RF)
Various
0011 3139 137 66921 Top Control Button
0013 3139 124 30381 Top Control Bracket
0158 3139 110 38741 Cable 4P 820mm
0209 4822 267 10567 Conn. 4P
1680 4822 276 13775 Switch
1681 4822 276 13775 Switch
1682 4822 276 13775 Switch
1683 4822 276 13775 Switch
[T1] Top Control Panel (FSQ)
Various
0011 3139 137 76961 Top Control Assy
0158 3139 110 38741 Cable 4P 820mm
0209 4822 267 10567 Conn. 4P
0310 3139 124 26992 Top Control Bracket
1680 4822 276 13775 Switch
1681 4822 276 13775 Switch
1682 4822 276 13775 Switch
1683 4822 276 13775 Switch
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