Sony Digital8 DCR-TRV250 Service Manual page 118

DCR-TRV250
COVER
COVER
For Schematic Diagram
• Refer to page 4-37 for printed wiring board.
• Refer to page 4-46, 4-47 for waveforms.
1
VC-304 BOARD (6/12)
A
SERVO(MD DRIVE BLOCK)
XX MARK:NO MOUNT
B
C
D
E
F
G
H
I
J
K
L
M
N
05
VC-304 (6/12)
4-2. SCHEMATIC DIAGRAMS 4-2. SCHEMATIC DIAGRAMS
2 3 4 5
NO MARK:REC/PB MODE
R:REC MODE
P:PB MODE
*:IMPOSSIBLE TO MEASURE THE
VOLTAGE AT THE MARKED POINTS.
EP_13.3V
MT_5V
46 VTR_UNREG
D_2.8V
(11/12)
REG_GND
MT_GND
MODE_SW_A
MODE_SW_A
MODE_SW_B
MODE_SW_B
MODE_SW_C
MODE_SW_C
DEW_AD
DEW_AD
R2402
330k
R2401
47k
47
(7/12)
HI8_MP_SW
HI8_MP_SW
REC_PROOF
REC_PROOF
ME_SW
ME_SW
R2404
270
XREEL_HALL_ON
48
XCC_DOWN
XCC_DOWN
(8/12)
M2200
MECHANISM
LM_-
DECK(2/2)
C2401
CN2401 2P
0.1u
M
M903 LM(-) 1
LODING LM_+
MOTOR LM(+) 2
C2450 C2449
100p 100p
CN2402 10P
DRUM_PG_SENS
PG 1
FG_PG_COM
FG-PG_COM 2
FP/PG DRUM_FG_SENS
FG 3
DRUM_COM
COM 4
W 5
DRUM_W
W 6
V 7
M901 DRUM_V
DRUM V 8
MOTOR
U 9
DRUM_U
U 10
CN2403 22P
VH- 1
WHE-
HW2 2
WHE+
HW1 3
VHE-
HV2 4
VHE+
HV1 5
UHE-
HU2 6
UHE+
HU1 7
VH+ 8
CAP_V 9
CAP_V
MECHANISM
CAP_V 10
BLOCK
CAP_W 11
(CAPSTAN MOTOR)
CAP_W
CAP_W 12
ORIGINAL SERVICE
MANUAL PAGE 4-58
CAP_U 13
CAP_U
CAP_U 14
REG_GND 15
FG2
FG2 16
FG VCC 17
FG1
FG1 18
MODE_SW_C
M-SW(C) 19
MODE_SW_B
M-SW(B) 20
MODE_SW_A
M-SW(A) 21
DEW_AD
DEW 22
CN2404 15P
XCC_DOWN
C_LOCK_SW 1
HI8_MP_SW
HI8_MP 2
REC_PROOF
REC_PROOF 3
ME_SW
ME/MP 4
HALL_COM 5
T_REEL_-
T_REEL(-) 6
T_REEL_+
MECHANISM T_REEL(+) 7
BLOCK
SENSOR_VCC 8
(SENSOR) S_REEL_+ R2403
S_REEL(+) 9
470
ORIGINAL SERVICE
S_REEL_-
MANUAL PAGE 4-58 S_REEL(-) 10
REG_GND 11
TAPE_LED(A) 12
TAPE_LED(K) 13
TAPE_END_C
4.5
TEPE_END(C) 14
TAPE_TOP_C
TAPE_TOP(C) 15
Q2401
2SC584600LS0
LED DRIVE
4-17
VC-304 BOARD SIDE A VC-304 BOARD SIDE A
6 7 8 9 10
C2414
0.1u
C2413
0.1u
R2419
2.2
FB2401
CAP_W
CAP_V
CAP_U
CAP_ON
C2402
0.1u
2.9
80 79 78 77
RB2401
10K
C2403
0.001u
CAP_FWD 2.9
1 C_FRC
2 TEST
2.8
19
3 VMR
CAP_FG 1.4
4 CFGOUT
5 C_PGND
R2405
XX
6 GND
FG1 *
7 CFGIN+
FG2 *
8 CFGIN-
C2406 1u
0.4
9 CAGC
UHE+ 0.6
10 U+
UHE- 0.6
11 U-
VHE+ 0.4
12 V+
VHE- 0.4
13 V-
WHE+ 0.1
14 W+
WHE- 0.1
15 W-
C2409 0.01u 0
16 VCC1
0.7
17 VH
1.3
18 TOPIN
TAPE_TOP 2.9
19 TOPOUT
TAPE_TOP_C 1.3
20 ENDIN
TAPE_END_C
C2407
0.047u
10V
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
TAPE_END 0
S_REEL_+
C2415
S_REEL_- 0.01u
SREEL_FG
T_REEL_+
C2418
T_REEL_- 0.01u
TREEL_FG
C2443
XX
C2444
XX
R2434
R2431
82
4700
0
C2442
C2441
XX XX
VC-304 BOARD SIDE B VC-304 BOARD SIDE B
11 12 13 14
C2416 C2417
C2428 C2433 C2438
0.1u 0.1u 0.1u
0.1u 0.1u
C2422 C2423
1u
0.1u
3.4
C2439
C2434
0.001u 0.001u
76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
C2431
0.001u
20
D_PGND 60
1.7
COM 59
1.7
WIN 58
1.7
VIN 57
1.7
UIN 56
0.9 C2435 0.047u
DFILTER 55
2.0
DFC 54
21 1.4
53
DFGOUT
R2428
*
DFGIN 52
R2433
1.3
FB2402
IC2401 22 VREF 51 XX
0.1
50
PGOUT
LODING/DRUM/CAPSTAN
1.3
FB2403
MOTOR DRIVE PGIN 49
IC2401 1.0
PGC 48
TB6550FG(EB)
C2430 1u
13.4
VG 47
C2429 0.022u
0.1
ISNF 46
1.1
DBOUT 45
23
1.1
44
DBIN
0.3
CBLOUT 43
0.3
CBOUT 42
0.3
CBIN C2440
41 C2437
24
0.1u
0.1u
R2424
0
C2432
C2427 XX
C2424 C2425
2.2u
0.01u XX
R2423
33k C2419 XX
SIGNAL PATH
REC REC/PB
Drum speed servo
Drum phase servo
Drum servo(speed and phase)
Capstan speed servo
Capstan servo(speed and phase)
4-18
15 16 17 18
LM_-
LM_+
DRUM_W
DRUM_V
DRUM_U
UNLOAD
UNLOAD
LOAD
LOAD
XCS_IC2401
XCS_IC2401
DRUM_PWM
DRUM_PWM
CAP_PWM
CAP_PWM
LM_LIM_DET
LM_LIM_DET
TREEL_FG
TREEL_FG
SREEL_FG
SREEL_FG 49
TAPE_TOP
TAPE_TOP
(7/12)
TAPE_END
TAPE_END
DRUM_FG
DRUM_COM DRUM_FG
DRUM_PG
DRUM_PG
TAPE_LED_ON
TAPE_LED_ON
CAP_FWD
CAP_FWD
CAP_FG
CAP_FG
CAP_ON
CAP_ON
DRUM_FG
VSP_SO 50
10k VSP_SO
DRUM_FG_SENS
XVSP_SCK
C2436 XVSP_SCK
(7/12)
470p FG_PG_COM
DRUM_PG
DRUM_PG_SENS
CAP_VS
DRUM_VS
UNLDAD 51
LOAD
(11/12)
DRUM_ERROR
CAP_ERROR
DRUM_PWM
CAP_PWM
R2418
10k
C2412 C2411
0.01u
0.01u
VSP_SO
XCS_IC2401
XVSP_SCK
19
SPCK
(2/12)
52
XRST_VTR
(7/12)
PB