Sony CAS-1 Service Manual page 88

CAS-1
2-4. SCHEMATIC DIAGRAM - MAIN board (3/5) -
1 2 3
MAIN BOARD (3/5)
A
ET402
(CHASSIS)
B
C
D
E
F
G
H
I
J
K
CL416
DAC-SCL
CL417
DAC-SDA
CL418
DAC-XRST
>009S CL419
DAC-ZERO-DATA
CL420
L
MAIN EVOL-CS
CL421
BOARD
EVOL-CLK
(4/5)
CL422
(Page 9)
EVOL-DATA
CL423
HP-DET
CL424
HP-RY
DCDC_4V
CL426
>006S
DAC-MCK
M CL427
DAC-BCK
MAIN CL428
DAC-LRCK
BOARD
CL429
(2/5)
DAC-DATA
(Page 7) CL430
DGND
CAS-1
4 5 6 7
C479
COM400 0.0022
R413
22
R486 D402
10k 1SS362-TE85L
C446
2200p
C447
1000p
100V
D401 5 4
1SS362-TE85L
IC400
C450
470p
100V
GATE SWITCH
IC400
TC7SH08FU
D400
1SS362-TE85L 1 2 3
IC401
D/A CONVERTER
IC401
PCM1795DBR
C400
R404
0.1
22 CL403
1
ZEROL VCC2L
R405 22 CL404
2
ZEROR AGND3L
C402
R401 10k CL405
3
0.1
MSEL IOUTL–
R406 22 CL406
(1.6) 4
LRCK IOUTL+
R407 22 CL407
C401 (1.6) 5
DATA AGND2
10
R408 22 CL408 (1.6) 6
BCK VCC1
CL409
R409 22 7
SCL VCOML
8
DGND VCOMR
(3.2) 9
VDD IREF
R402 10k CL410
(0) 10
MS AGND1
R403 10k CL411
(0) 11
MDI IOUTR–
R410 100 CL412 12
MC IOUTR+
R411 100 CL413 13
MDO AGND3R
R412 100 CL414
(3.2) 14
RST VCC2R
C403
CL401 0.1
C404 C405
10 0.1
3 2 1
IC402 IC403
+3.3V REGULATOR +5V REGULATOR
IC402 IC403
NJM2871BF33-TE2 MM1836A50NRE
4 5
FB400
C467
CL402
0.1
CL415
COM651
COM650
C438 R438 R440
100 10k 10k
25V
32 31 30 29 28 27 26 25 24 23 22 21 20 19
IC407
ELECTRICAL VOLUME
IC407
NJW1194
1 2 3 4 5 6 7 8 9 10 11 12 13 14
C440 R439 R441 R442
22 22 22 22
C437 63V
C439
22
100
50V
25V
R437
220k
CL436
8 9 10 11
C420
270p
CL431
R422
680
4 3 2 1
C417
39 IC404
16V
LOW-PASS FILTER
R418 IC404
1k NJM4580M-(TE2)
5 6 7 8
R417
1k
28 (4.9)
C412 0.1
27
26 (2.4)
25 (2.4)
C414 39 16V
24
23 (4.9) R420
680
CL432
22 C413 100 16V
C415 39 16V
21
R416
10k C418
C416 39 16V
20 (2.4)
270p
19
18 (2.4)
17 (2.4)
16 C411 0.1
C421
CL433
270p
15 (4.9)
C407 39 16V
R423
C408 0.1
680
D405 R485 C409 C410
DA2J10100L 10k 0.47 39
16V
4 3 2 1
IC405
3 2 1
LOW-PASS FILTER
IC405
NJM4580M-(TE2)
5 6 7 8
4 5
R421
680
R484
C419
15k CL434
270p
CL450
CL451 CL454
R457
R463
2.2k
1k R467
10k
C459 C461
22 0.001
63V
18 17
C457
22
63V
CL456
R466
3.3k
15 16
C445
0.001
IC408
HEADPHONE AMP
C443
220p
IC408
TPA6120A2DWPR
C441
220p
R461
10k
CL452
R462
10k
R458 R464
2.2k 1k
CL453 CL455
C458 C462
22 0.001
63V
R470
22k
R465 R468
3.3k 10k
8 8
12 13 14 15
R434
680 CL435
C444
22 C435 C436
63V R424 R435 0.0022 22
560 560 50V
C426
C428
100
R427 0.0047 R431
50V
560 560
R428 C430 R436
C422
680 0.0022 220k
0.001
R429 C431
C424 680 0.0022
0.001
C432
0.001
4 3 2 1
IC406
MIX AMP
IC406
NJM4580M-(TE2)
6
5 7 8
R425 R430
560 560
C423
0.001
C425
0.001
C433
0.001
C427
100
50V
C442
22
63V
C429
R426 0.0047 R433
560 560
R432 C434
680 0.0022
R469
C448
22k
0.1
CL458
R474 R475
C464
100k 10
1 1/2W
R471
100k
-2
R476
-1
10
1/2W
+ –
RY400 D406
IC409
DA2J10100L
DC SERVO
C465
IC409 0.1
NJM2119M(TE2)
R472
100k C472
1000p
R479
C460
100 (0.1)
22
1W
63V
C463
(0.7)
C449
1
0.1
Q405
2PD601ART
R473
RELAY DRIVE
100k
R477 R478
2.2k 47k
CL459
Note: IC408 on the MAIN board cannot replace with single. When
this part is damaged, replace the complete mounted board.
16 17 18
CL462
AREGGND
CL460 >008S
AGND
CL463
AHP+7V MAIN
BOARD
CL461
(2/5)
AHP–7V
(Page 7)
R487
0
R459 R460
100k 100k CN400
4P
CL464
1 HP DET
>04S
CL465
2 R-CH
HP
3 GND
CL466 BOARD
CN161
4 L-CH
Refer to page
C481 45 on original
1000p service manual
100V
C482
2200p
C466
470p
100V
D408
DA2J10100L
D407
DA2J10100L
C468
1000p
ET401
(CHASSIS)