Sony DCR-TRV940 Service Manual page 16

COVER
COVER
For Schematic Diagram
• Refer to page 4-93 for printed wiring board.
1 2 3 4
VC-288 BOARD (12/17)
DRUM/CAPSTAN/LOADING DRIVE(MD BLOCK)
A
XX MARK:NO MOUNT
NO MARK:REC/PB MODE
MT_GND
VTR_UNREG
112
MT_4.9V
D_2.8V
(17/17)
B EVF_13.5V
REG_GND
CAP_W
CAP_V
CAP_U
CAP_VS
CAP_ON
C 113
CAP_ERROR
(16/17) DRUM_ERROR
DRUM_VS
R2421
D
XX
CAP_FWD
IC2402
XX
- VCC MR_VCC
VSS CAP_FG
+ out
C2413
XX
R2408 6.3V
FG1
XX B
R2414
1608 FG2
XX
E
UHE+
UHE-
VHE+
VHE-
WHE+
WHE-
F
HE_VCC
TAPE_TOP_C
TAPE_TOP
TAPE_END_C
TAPE_END
G
SREEL_FG
TREEL_FG
47 SPCK
(4/17) SPCK
H
114 XRST_VTR
(13/17) XRST_VTR
XVSP_SCK
115 XVSP_SCK
(13/17)
VSP_SO
VSP_SO
CHIME_VDD
53 CHIME_VDD
I
CHIME_SDA
CHIME_SDA
DRUM_PWM
(5/17) CHIME_SCK
CHIME_SCK
CAP_PWM
REC_PROOF
66
(5/17) REC_PROOF
116 XCC_DOWN
XCC_DOWN
(14/17)
J
K
L
05
4-2. SCHEMATIC DIAGRAMS 4-2. SCHEMATIC DIAGRAMS
5 6 7 8
:Voltage measurment of the CSP ICs
and the Transistors with mark,are
not possible.
L2401
10uH
R2404
R2407 96 95 94 93 92 91 90
10k
10k
C2401
0.001u
C2402
0.001u
C_FRC
TEST
VMR
CFGOUT
C_PGND
R2402
XX
GND
CFGIN+
CFGIN-
C2403 1u
CAGC
U+
U-
V+
V-
W+
W-
C2406 0.1u
VCC1
VH
C2404 0.047u
TOPIN
TOPOUT
C2405 0.047u
ENDIN
ENDOUT
RLP1
C2435
RLM1
0.01u
RLO1
C2436
0.01u
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
C2437
0.01u
R2405 0 R2413 0
0
R2403 0 R2411
R2415 10k
R2412 R2416
2200
10k
R2406 R2409 R2418 C2414
C2407 C2408
XX XX 15k 0.1u
6800p 6800p
HALL FG FG/PG
M902 M901
CAPSTAN MOTOR DRUM MOTOR
4-35
VC-288 BOARD SIDE A VC-288 BOARD SIDE A VC-288 BOARD SIDE B VC-288 BOARD SIDE B
9 10 11 12
C2416
C2417
1u
0.1u
C2409 C2411
0.1u 0.1u
C2410
0.1u
R2417 C2412
2.2 R2419 0.1u
2.2
R2420
2.2
89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73
L_OUT2
NC
L_VM
L_OUT1
D_W
D_VS
NC
D_V
D_VS
D_U
IC2401
NC
DRUM/CAPSTAN/LOADING
NC
DRIVE
IC2401
D_PGND
TB6550XBG(EB)
COM
WIN
VIN
UIN
DFILTER
C2429
DFC 0.047u
DFGOUT
DFGIN
VREF
PGOUT
PGIN
C2424
0.022u R2434
0
R2423
0
C2419 R2424
C2418 C2425 C2426
18k C2434
XX
0.01u 1u 0.1u 1u
R1016 R1032
33 68k
SIGNAL PATH
MECHANISM BLOCK
(PAGE 4-83)
J-MECHANISM (2/2)
DCR-TRV940/TRV940E/TRV950/TRV950E
13 14 15 16
XREEL_HALL_ON
C2422 C2427
0.1u
0.1u
C2432
R2438
0.1u
100k
4
R2437
4700
TAPE_LED_ON
1
3 2
Q2402
EC3201C-PM-TL
LED DRIVE
TAPE_LED_K
R2431
270
TAPE_LED_A
R2436
22k
2.7 Q2401
2SA2018H-T2L
SENSOR VCC SWITCH
SENSOR_VCC
LM_-
LM_+
DRUM_W
DRUM_V
DRUM_U
R2426
R2427
XX XX R2428
XX
C2428 C2433
470p 470p
C2423
470p
DRUM_COM
DRUM_FG
R2429 10k
DRUM_FG_SENS
C2430
470p
FG_PG_COM
DRUM_PG
DRUM_PG_SENS
C2431
0.1u
DRUM_FG
DRUM_FG
DRUM_PG
DRUM_PG
XCS_3IN1
XCS_3IN1
UNLOAD
UNLOAD
LOAD
LOAD
LM_LIM_DET
LM_LIM_DET
CAP_PWM
CAP_PWM
DRUM_PWM
DRUM_PWM
TREEL_FG
TREEL_FG
SREEL_FG
SREEL_FG
TAPE_TOP
TAPE_TOP
TAPE_END
TAPE_END
CAP_FWD
CAP_FWD
CAP_FG
CAP_FG
CAP_ON
CAP_ON
MODE_SW_C
MODE_SW_C
MODE_SW_B
MODE_SW_B
MODE_SW_A
MODE_SW_A
DEW_AD
DEW_AD
R1033
220k
REC REC/PB PB
Drum speed servo
Drum phase servo
Drum servo(speed and phase)
Capstan speed servo
Capstan servo(speed and phase)
4-36
117
(13/17)
118
(13/17)
VC-288 (12/17)