Hitachi 22LD3750DC Service Manual page 34

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