Hitachi 22LD3750DC Service Manual page 34

HEADPHONE AMPLIFIER
S157
12
HP_PLUGGED
C170 C171
12 12
1n 1n
50V 50V
C266
2
100n
1
F116 16V R425
8 1
+5V_HP 12
VDD OUTA 12
60R
U699
1 7 2
OUTB INAN
C548
100u 2 TDA1308T
R140
6 3
16V
INBN INAP 12 470R
C344
R423 R141
5 4
HP_L
12 39k 12 470R INBP VSS
12
470n
16V
R142
12 470R
R143
12 470R
U699 yak õ nõ nda olacak
R483
ON/OFF_NOT 12
10k
1 TP181
S171
TV_TXD 12
MUTEPORT
PREAMPLIFIER
Preamplifier MP7722'ye yak õ n olacak.
C570
+8V R557
12 1K
12
1U
16V
U716
LM358D S189
R576 12
1 8
R545 12 33K OUT1 VCC R575
2 7
IN1- OUT2
12 10K 1 33K 2
3 6
10K IN1+ IN2-
1 2
4 5
R551 GND IN2+
MAIN_R
R574
R577
R546
R552
C437
IF BUFFER
+8V_IF
12
10p
50V
3
C166
R126
Q148
IF1 12 2
150R
12 BC848B
1n
1 C168
50V
S144
12
DVB_IF1
12
1n
50V
C438
+8V_IF
12
10p
50V
3
C167
R127
Q149
IF2 2
12 150R
12 BC848B
1n
C169
1
50V S143
12 DVB_IF2
12
1n
50V
No. 0249
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+5V
AUDIO MUTE
C264
MUTE
12
100n
3
R349
16V
Q146
2
R239 12 10k
BC848B
12 100R
1
Q168
3
BC858B
R300
Q147
2 12 47k
3 1
BC848B
1
2
39k
C331
R422
S139
12 12
39k HP_R +12V
12
R156
470n S140
12 220k PANEL_VCC 12
16V
C509
S141
12
+5V
12
1u S142
12
+3V3
16V
C113
100n
12
50V
C114 U701 yak õ nõ na ba ˜ lanacak
HP_R ve HP_L ile paralel gelecek
12
VDD_AUDIO
100n
50V
R480
12 10k +3V3
C488
2
10u
3 1
1 10V
C658 C604
Q170 2 2
2
10U 1N
BC848B
1 1
16V 50V R585
1
1
NC1 PGND1
2
REF1
C592
C572 2
R515 3N3
3
1
12 50V IN1
12K
12
10U
4
AGND1
10V
U717
C659
5
2
NC2
68N
1
50V MP7722
6
10V
MUTE 10K EN1 PGND2
12
10U
R547
R514
7
1 2
1 12K 2 IN2
C641
2
C571 2N2
8
1
100K 50V REF2
2 1
R587
C657 C603
9
2 2
VDD_AUDIO 10U 1N AGND2
1 1
R584 16V 50V R548
10
EN2
1 10K 2
MUTE
C660
1
VDD_AUDIO
TUNER
R434
IF1 12
IF1 100R +33V
11
C148
2
IF2 IF2 100n
10
1 50V
VTS
9
F109
C268
2
XTO/GPIO 2 1 100n
8
50R
1
16V F115
C267
2
12
VC2 1u +5V_TUNER
7
60R
1 16V
C383
2
VC1
39p
6
1
50V
S138
12
SDA SDA_SW
5
S137
SCL 12
SCL_SW
4
C384
2
CAS 39p
3
1
R489
S187
12
RAG 12 4k7 AGC_SW
S186
2 TH101
12
C430
2
MOI 12
10n +5V
1
1
16V
2R1
Audio and Tuner
SPDIF SWITCH
TP182
1 S174 1 6
GPIO_2 12
SELECT NO IDTV_SPDIF
U711
2 5
+5V_SPDIF V+ COM
NLAST4599
3 4
GND NC DVD_SPDIF
MUTEPORT
C551
Q188
SPDIF BUFFER
BC848B
12
+5V_SPDIF
100u 3 1
16V
2
C563
SPDIF_OUT
12
C559
10n
1
2
R503 1n
16V
Q190
SPDIF_SW 1
12 47R 50V
2
BC858B
R502
3
12 47R
FEEDBACK_R
F168
12
60R
C601
1
22U
50V
2
100K
VDD_AUDIO
2
R586 D151
D148
12
C661 C568 1N4148
2 2
R588
68N 1U
20
1 1
50V 16V
19
SW1
C665
18
2
VDD1 D145
470N
1
25V R528 R549
17
BS1
D152
16
NC4
C646
2
390P
15
1
50V
14
SW2
C666
13
2
VDD2 D146
470N
1
25V R529 R550
12
BS2
D154
11
NC3
R589
C647
2
D149
390P
1
1 2 50V
1N4148
C662 C569
2 2
D153
68N 1U
1 1
50V 16V
F169
2
60R
C602
1
22U
2 50V
FEEDBACK_L
HDMI AUDIO DAC
R347
HDMI_MUTE
12 10k
MCLKOUT
MCLK AOUTR
45
WS LRCK AGND
3 6
CS4335
SCK
SCLK VA
2 7
U705
SDO SDATA AOUTL
1 8
R348
HDMI_MUTE 12
10k
AUDIO SWITCH
1 28
C265
GND SDA
C517
12 2 27
2 1 CAPACITANCE SCL2
SPDIF_SW
100n
F160
16V 22u
3 26
+8V
12 VS ADDR
16V
60R
C342
4 25
HDMI_L_IN L1 R1
12
220n
5 24
L2 R2
16V
C335
6 23
SWITCH_SOUND_L
L3 R3
12
U702
220n
7 22
NC1 NC4
16V
TEA6422D
8 21
NC2 NC3
C117
9 20
PCIL
L4 R4
12
C333
220n
10 19
DVD_L_IN L5 R5
16V
12
C332
220n
11 18
DVB_L_IN
L6 R6
16V
12
C376
220n
12 17
SWAUD_OUT_L LOUT1 ROUT3
16V
12
C375
1u
13 16
SWAUD_OUT_R
ROUT1 LOUT3
50V
12
1u
14 15
LOUT2
LOUT2 ROUT2
50V
DVD_SPDIF
IDTV_SPDIF
CN128
1
2
C656
2
R537
22P
1
50V
CN129
CN102
L119 1
12 1
22U
2
C136
2
C667
2
470N R531
12
1
25V
470u
50V
C137
C663
2
68N
12
1
50V
470u CN116
L118
50V
12 1
22U
2
C655 C668
2 2
R536 R530
22P 470N
1 1
50V 25V
F167 D155
C664
2
68N +12V_AUDIO 1 2 12
60R
1
50V SS33
I2C LEVEL SHIFT
TP162 12
1
C525
1
47u
2 16V
3
3
Q150
2
BC848B BSN20
Q157
1
2
C450
TP165 12
R366
1
12 7k5 HDMI_R_IN
12
3u3
50V
C269 C359
2 2
100n 10u
1 1
16V 10V F161
12
+5V
60R
C451
R367
12 7k5 HDMI_L_IN
12
C524
3u3 1
47u
50V
16V
2
3
Q151
2
BC848B
1
R284
12 470R SDA_5V
R285
12
470R SCL_5V
C343
HDMI_R_IN
12
220n
16V
C341
SWITCH_SOUND_R
12
220n
16V
C337
PCIR
12
C338
220n
DVD_R_IN
16V
12
C339
220n
DVB_R_IN
16V
12
220n
ROUT3
10V
LOUT3
ROUT2
S169
12
SPDIF_SW
S170
12
SPDIF_SW
C3
DVD_SPDIF
12
100n
16V
S4
12
IDTV_SPDIF
VDD_AUDIO
C594 C593
1 1
470u 470u
2 16V 2 16V
R493 R494
12 1 TP163
4k7 4k7
3
1 1
BSN20
Q156
2
R350 R351
12 1 TP164
10k 10k