Haier L42H8 Service Manual page 33

5
6VBuf1
CA16 CA16
100uF/16V 100uF/16V
R414 R414
R415 R415
33K 33K
D
AMP-L C340 C340 2.2uF 2.2uF R439 R439 10K 10K
2 AMP-L
C342 C342
1nF 1nF
C343 C343 2.2uF 2.2uF R441 R441 10K 10K
AMP-R
2 AMP-R
C179 C179
1nF 1nF
C
6VBuf2
CA18 CA18 100uF/16V 100uF/16V
R410 R410 33K 33K R411 R411
PH-L C273 C273 2.2uF 2.2uF R424 R424 10K 10K
2 PH-L
C194 C194
1nF 1nF
B
C272 C272 2.2uF 2.2uF R422 R422 10K 10K
PH-R
2 PH-R
C173 C173
1nF 1nF
H1 H1 H2 H2
A
5 9 5 9
4 8 4 8
3 7 3 7
2 6 2 6
NC NC NC NC
5
4
+12V
R437 R437
33K 33K 100 100
OP_VCC1
C341 C341 CA17 CA17
U45A U45A 0.1uF 0.1uF 100uF/16V 100uF/16V
3
+ +
1 AMP-Lin
2
- -
TL062 TL062 R402 R402
R455 R455 68K 68K 47K 47K
C479 C479 100pF 100pF
OP_VCC1
U45B U45B
5
+ +
AMP-Rin
7
6 For 26dB change R5, R14, R17 and
- -
R403 R403 R26 from 100k into 200k.
TL062 TL062
* = R35 and R36 need to have the
R459 R459 68K 68K 47K 47K same value as the output
impedance of the signal source.
C478 C478 100pF 100pF
+5V +12V
R427 R427 R430 R430
0 0 NC NC
33K 33K
OP_VCC2
C199 C199 CA19 CA19
U38A U38A 0.1uF 0.1uF 100uF/16V 100uF/16V
3
+ +
1
2
- -
R404 R404
PT2308 PT2308
47K 47K P8 P8
R421 R421 33K 33K CA92 CA92 100uF/16V 100uF/16V PH-Lout
3
5
C464 C464 100pF 100pF CA93 CA93 100uF/16V 100uF/16V PH-Rout
2
4
1
OP_VCC2 6
R301 R301 R302 R302
7
U38B U38B CON5_2.0 CON5_2.0
5
+ +
1K 1K 1K 1K
7
6
- -
R405 R405
PT2308 PT2308
R426 R426 33K 33K 47K 47K
C473 C473 100pF 100pF
H4 H4
5 9
4 8
3 7
2 6
NC NC
4
3
CON39 CON39
+12V
1
L31 L31
2
L10 L10 R406 R406
3
4
CON4_2.5 CON4_2.5
NC NC
C98 C98 C97 C97
0.1uF 0.1uF
470uF/35V 470uF/35V
OUT1- R37 R37 100K 100K
AMP-Rin C7 C7 330nF 330nF R67 R67 10K 10K R69 R69 10K 10K
C85 C85 R55 R55
C87 C87
220pF 220pF
C86 C86
47pF 47pF R56 R56
220pF 220pF
R54 R54 0 0 C52 C52 330nF 330nF R68 R68 10K 10K R70 R70 10K 10K
OUT1+ R71 R71 100K 100K C78 330nF C78 330nF
HP_MUTE_AMP
OUT2- R59 R59 100K 100K
cc
R61 10K R61 10K
AMP-Lin C53 C53 330nF 330nF R63 R63 10K 10K
C88 C88
220pF 220pF
C92 C92
68pF 68pF
C89 C89
220pF 220pF
R65 R65 0 0 C57 C57 330nF 330nF R62 R62 10K 10K R64 R64 10K 10K
OUT2+ R60 R60 100K 100K
+5V
R412 R412 R418 R418
10K 10K 10K 10K
R327 R327 100 100 HP_DET
3904 3904
R328 R328 4.7K 4.7K
1
CA20 CA20
100uF/16V 100uF/16V Q21 Q21
R329 R329 NC NC HP_MUTE_AMP
H5 H5 H6 H6
5 9 5 9
4 8 4 8
3 7 3 7
2 6 2 6
NC NC NC NC
3
2
L29 L29
R409 R409 R66 R66 L1 L1
C3 C3 10 10 C74 C74
0.1uF 0.1uF 0.1uF 0.1uF
NC NC C84 C84 C81 C81
470uF/16V 470uF/16V 470uF/16V 470uF/16V
C79 C79 C80 C80
0.1uF 0.1uF 0.1uF 0.1uF
U10 U10
10K 10K C76 220nF C76 220nF
2 26
IN1P OUT1P
10K 10K
27
BOOT1P
3
IN1M
29
BOOT1M
28
OUT1M
C77 220nF C77 220nF
8
CDELAY
TFA9810T TFA9810T C64 C64
1uF 1uF
6 31
SO/OL STABI1
C72 C72
7
ENABLE
1uF 1uF
18
STABI2
10
DIAG
C55 220nF C55 220nF
11 23
TEST OUT2P
R57 R57
22
BOOT2P
10K 10K
15
IN2P
20
BOOT2M
14 21
IN2M OUT2M
R58 R58 C54 220nF C54 220nF
10K 10K
R76 R76 22 22
5Vstb
AMP-MUTE
2 AMP-MUTE
5Vstb
R282 R282
R281 R281
D70 D70 D71 D71
1N4148 1N4148
Q25 Q25
1N4148 1N4148
10K 10K
1
B B
SOT SOT
C C
R283 R283 1K 1K
2 23 23
E E
HP_DET
R286 R286 CA82 CA82 3906 3906
CA83 CA83
+ +
+ +
100K 100K 47uF/16V 47uF/16V
10uF/16V 10uF/16V
H14 H14
5 9
H9 H9
4 8
NC NC
3 7
H8 H8
2 6
Title Title Title
NC NC
<Title> <Title> <Title>
NC NC
Size Size Size Document Number Document Number Document Number
H7 H7
NC NC A3 A3 A3 <Doc> <Doc> <Doc>
Date: Date: Date: Saturday, February 23, 2008 Saturday, February 23, 2008 Saturday, February 23, 2008
2
1
D
FOR 8ohm:L5,L26=22uH,C75,C71,C93,C94=330nF;
L33 L33 22uH 22uH
5 4
OUT1+ 1 2 AMP-Rout+
C82 C82 C93 C93
470pF 470pF
R48 10 R48 10 330nF 330nF
R47 10 R47 10 C94 C94
C83 C83
470pF 470pF 330nF 330nF
OUT1- AMP-Rout-
5 4
1 2
L32 L32 22uH 22uH
CON17 CON17
1
2
3
4
CON2_2.54 CON2_2.54
FOR 8ohm:L27,L28=22uH,C56,C59,C95,C96=680nF;
L30 22uH L30 22uH
C
5 4
OUT2+ 1 2 AMP-Lout+
C90 C90 C95 C95
470pF 470pF
R50 10 R50 10 330nF 330nF
R49 10 R49 10 C96 C96
C91 C91
470pF 470pF 330nF 330nF
OUT2- AMP-Lout-
5 4
1 2
L28 L28 22uH 22uH
R428 R428
Q27 Q27
B
10K 10K 3904 3904
R287 R287
10K 10K 1
B B
R289 R289 100 100
SOT SOT 3
C C
23 23
2
E E
10K 10K HP_MUTE_AMP
R330 R330 NC/0 NC/0
Q26 Q26
3 R284 R284
1K 1K
1
B B
SOT SOT R288 R288 100 100
3
C C
2 23 23
E E
R285 R285 C253 C253
3904 3904
2.2uF 2.2uF
22K 22K
A
Rev Rev Rev
<RevCode> <RevCode> <RevCode>
Sheet Sheet Sheet 1 1 1 of of of 1 1 1
1