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DCR-TRV24E/TRV25E/TRV27E
COVER
COVER
4-2. SCHEMATIC DIAGRAMS
VC-281 BOARD SIDE A
VC-281 BOARD SIDE B
4-2. SCHEMATIC DIAGRAMS
VC-281 BOARD SIDE A
VC-281 BOARD SIDE B
VC-281 (13/16)
4-61
4-62
For Schematic Diagram
• Refer to page 4-89 for printed wiring board.
• Refer to page 4-97 for waveforms.
• Refer to page 4-89 for printed wiring board.
• Refer to page 4-97 for waveforms.
0.1
2.5
2.6
0
0.1
0
0.1
2.6
0.3
8.1
0.3
2.6
R0.5/P0.3
0.3
R0.5/P0.3
0.3
0.4
2.6
*
0.2
0.3
0.3
0.8
0.8
0.2
2.5
0.3
0.3
2.6
0.3
1.3
*
1.3
2.6
2.6
21
1.3
20
22
0.5
1.3
*
1.3
1.3
1.3
1.3
23
0
24
0.7
25
5.0
26
0
13.8
1.0
0.4
1.3
0.4
0.8
1.3
2.5
1.3
0.8
2.6
1.3
0.1
1.0
1.8
2.5
1.3
0.4
2.4
1.3
4.6
0
0.5
2.4
2.6
NO MARK:REC/PB MODE
R :REC MODE
P :PB MODE
* :Cannot be
measured
R :REC MODE
P :PB MODE
* :Cannot be
measured
10k
R2429
XX
R2426
CAP_FG
B
470p
C2428
16V
4700
R2437
DRUM_ERROR
0.1u
B
C2427
10V
B
470p
C2423
16V
CAP_ERROR
0.1u
B
C2406
16V
470p
B
C2430
50V
B
470p
C2433
16V
2.2
R2420
CAP_PWM
DRUM_VS
1u
10V
F
C2416
XX
R2427
DRUM_PWM
MT_5V
0.1u
B
C2431
10V
EP_13.3V
0.1u
B
C2409
10V
LM_LIM_DET
0.1u
B
C2422
10V
0.1u
B
C2432
10V
0.1u
B
C2417
10V
0
R2434
TAPE_LED_ON
LOAD
1u
B
C2426
6.3V
2SA2018H-T2L
Q2401
CAP_VS
XREEL_HALL_ON
UNLOAD
2.2
R2419
XX
R2428
XX
C2420
0.001u
B
C2401
50V
6800p
B
C2408
16V
10k
R2404
270
R2431
2.2
R2417
SREEL_FG
10uH
L2401
0.1u
B
C2410
10V
0
R2423
0.1u
F
C2415
16V
TREEL_FG
22k
R2436
10k
R2407
XX
C2413
0.001u
B
C2402
50V
MT_GND
0.047u
B
C2404
10V
0.022u
B
C2424
16V
XX
C2419
VTR_UNREG
TAPE_END
15k
R2418
0.047u
B
C2405
10V
6800p
B
C2407
16V
REG_GND
0.1u
B
C2412
10V
2SC4738F-Y/GR(TPL3)
Q2402
100k
R2438
D_2.8V
TAPE_TOP
18k
R2424
0.1u
B
C2414
10V
IC2401
TB6550FG(EB)
1
C_FRC
2
TEST
3
VMR
4
CFGOUT
5
C_PGND
6
GND
7
CFGIN+
8
CFGIN-
9
CAGC
10
U+
11
U-
12
V+
13
V-
14
W+
15
W-
16
VCC1
17
VH
18
TOPIN
19
TOPOUT
20
ENDIN
21
ENDOUT
22
RLP1
23
RLM1
24
RLO1
25
RLDO1
26
RLP2
27
RLM2
28
RLO2
29
RLDO2
30
VCC2
31
LIMOUT
32
DEC1
33
DEC2
34
XRESET
35
MCK
36
SCK
37
XCS
38
SI
39
DGND
40
CSR
41
CBIN
42
CBOUT
43
CBLOUT
44
DBIN
45
DBOUT
46
ISNF
47
VG
48
PGC
49
PGIN
50
PGOUT
51
VREF
52
DFGIN
53
DFGOUT
54
DFC
55
DFILTER
56
UIN
57
VIN
58
WIN
59
COM
60
D_PGND
61
N.C.
62
N.C.
63
D_U
64
D_VS
65
D_V
66
N.C.
67
D_VS
68
D_W
69
L_OUT1
70
L_VM
71
N.C.
72
L_OUT2
73
L_PGND
74
C_U
75
C_VS
76
C_V
77
C_VS
78
C_W
79
N.C.
80
CAPON
CAP_ON
CAP_FWD
DRUM_FG
DRUM_PG
XRST_VTR
XVSP_SCK
VSP_SO
XCS_3IN1
XX
R2406
XX
R2409
0
R2405
0
R2403
0.01u
B
C2418
16V
XX
C2421
XX
R2402
0.1u
B
C2434
16V
0.047u
B
C2429
10V
0
R2413
0
R2411
SPCK
1u
B
C2425
6.3V
2200
R2416
0.01u
F
50V
C2435
0.01u
F
50V
C2436
0.01u
F
50V
C2437
0
R2439
0
R2440
10P
CN1011
1
2
3
4
5
6
7
8
9
10
33
R1005
CHIME_SCK
33
R1006
68k
R1024
27P
CN1009
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
4.7uH
L1001
CHIME_VDD
220k
R1023
CHIME_SDA
27P
CN1010
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
1u
B
C2403
6.3V
0.1u
B
C2411
10V
MODE_SW_A
MODE_SW_B
MODE_SW_C
DEW_AD
1
A
XCC_DOWN
REC_PROOF
R2441
47k
WHE+
VHE-
UHE+
SENSOR_VCC
VHE+
UHE-
CAP_V
CAP_U
WHE-
TAPE_LED_K
FG2
MR_VCC
CAP_W
DRUM_FG
DRUM_PG
DRUM_FG_SENS
UNLOAD
LOAD
SREEL_FG
TREEL_FG
TREEL_FG
SREEL_FG
TAPE_LED_A
DRUM_ERROR
CAP_ERROR
DRUM_W
DRUM_V
FG1
LM_+
LM_-
HE_VCC
S_REEL_+
S_REEL_-
T_REEL_+
DRUM_PG_SENS
T_REEL_-
DRUM_PG_SENS
VHE+
MODE_SW_C
T_REEL_-
FG_PG_COM
DRUM_FG_SENS
UHE-
MODE_SW_B
SENSOR_VCC
T
APE_END_C
CAP_U
CHIME_SDA
CHIME_VDD
DRUM_COM
DRUM_W
LM_-
CAP_V
XCC_DOWN
WHE+
FG1
WHE-
UHE+
S_REEL_-
MODE_SW_A
VHE-
CAP_W
FG2
T
APE_LED_A
LM_+
T
APE_LED_K
MR_VCC
S_REEL_+
CHIME_SCK
DRUM_V
HE_VCC
DRUM_U
T_REEL_+
T
APE_TOP_C
TAPE_TOP_C
TAPE_END_C
DRUM_U
TAPE_LED_ON
XREEL_HALL_ON
DRUM_COM
DRUM_ERROR
CAP_ERROR
DEW_AD
CHIME_SCK
CHIME_SDA
CHIME_VDD
XCC_DOWN
XREEL_HALL_ON
TAPE_LED_ON
DRUM_FG
DRUM_PG
UNLOAD
LOAD
MODE_SW_A
MODE_SW_B
MODE_SW_C
DEW_AD
FG_PG_COM
N.C.
FG
TREEL-
TOP/END_GND
CAP_U
FG2
VHE-
XMODE_SW_C
XMODE_SW_A
HE_GND
CHIME_SDA
FG_GND
UHE-
FG_VCC
DRUM_W
T
APE_TOP
FG1
DRUM_V
FG/PG_COM
XMODE_SW_B
XREC_PROOF
T
APE_LED_A
FG_VCC
CAP_U
CHIME_SCK
WHE+
DRUM_W
FG_GND
M_COM
HALL_VCC
SW_COM/SW_GND
DRUM_U
T
APE_END
WHE-
DEW+
CAP_U
CAP_W
VHE+
LM_UNLOAD
MIC/REC_SW_GND
CAP_W
XCCDOWN_SW
CAP_V
T
APE_LED_K
CAP_W
DRUM_V
HALL_GND
CAP_V
LM_UNLOAD
PG
SREEL+
UHE+
CAP_U
CAP_W
LM_LOAD
CAP_V
CHIME_VDD
LM_LOAD
DEW
-
SREEL-
HE_VCC
CAP_V
TREEL+
DRUM_U
FG/PG
M901
DRUM MOTOR
DRUM MOTOR
FG
HALL
M902
CAPSTAN MOTOR
CAPSTAN MOTOR
TO MECHANISM BLOCK
J-MECHANISM(2/2)
DRUM/CAPSTAN/LOADING
MOTOR DRIVE
IC2401
DRUM/CAPSTAN DRIVE(MD BLOCK)
XX MARK:NO MOUNT
VC-281 BOARD(13/16)
H
2
3
12
J
17
9
G
11
E
C
10
K
14
13
6
B
7
I
D
F
15
5
L
8
4
16
REC
Capstan servo (speed and phase)
PB
SIGNAL PATH
Drum speed servo
Drum servo (speed and phase)
REC/PB
Drum phase servo
Capstan speed servo
Capstan phase servo
16
SWITCH
SWITCH
75
(16/16(CN1007))
(2/16,3/16,
4/16,7/16,
10/16,11/16)
4/16,7/16,
10/16,11/16)
11
76
(14/16)
31
(4/16,7/16,9/16,
10/16,14/16,16/16
(CN1007))
10/16,14/16,16/16
(CN1007))
77
(15/16)
6
(1/16,7/16,10/16,
11/16,14/16,16/16
(CN1007))
11/16,14/16,16/16
(CN1007))
(5/16)
41
(PAGE 4-36)
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