CCD-TRV128/TRV228/TRV228E/TRV328/TRV428/TRV428E
TRV228E
/TRV428E
TRV128
/TRV228
/TRV328
/TRV428
∗:IMPOSSIBLE TO MEASURE THE
VOLTAGE AT THE MARKED POINTS.
R:REC MODE
P:PB MODE
NO MARK:REC/PB MODE
0.5
0.8
2.8
2.8
2.8
1.4
1.4
R0/P1.4
0.4
0.6
0.6
0.4
0.4
0.2
0.2
2.8
0.7
1.3
2.8
1.3
00
1.9
1.9
1.9
1.9
8.3
0.2
2.8
1.5
2.5
2.8
0.5
1.5
2.8
0.8
0.8
1.5
0.2
0
0.2
0.5
1
0.5
1
0.5
0
4.4
0.3
0.3
0.3
0.6
0.6
0.1
13.6
0.9
1.3
0.1
1.3
1.3
1.4
2.1
0.8
0.8
0.8
0.8
0.8
:TRV128/TRV228/TRV328/TRV428
:TRV228E/TRV428E
:TRV128/TRV228/TRV328/TRV428
:TRV228E/TRV428E
TRV228E/TRV428E
∗∗
TRV228E/TRV428E
wd
IC401 4 REC/PB
2.8 Vp-p
PAL: 1148 Hz
NTSC: 820 Hz
wf
1.4 Vp-p
IC401 yd,yg,yk REC/PB
NTSC: 180 Hz
PAL: 150 Hz
NTSC: 180 Hz
PAL: 150 Hz
wg
IC401 td REC/PB
2.8 Vp-p
wh
IC401 t; REC/PB
2.8 Vp-p
PAL: 40 msec
NTSC: 33.3 msec
wj
IC401 rf REC/PB
80 mVp-p
13 sec
wk
70 mVp-p
IC401 ra REC/PB
13 sec
44
(7/10)
43
(6/10)
52
(9/10)
91
(10/10)
(6/10)
45
(6/10)
47
48
(6/10)
(6/10)
51
50
(6/10)
(9/10)
46
(1/10)
12
FB401
MODE_SW_B
XCS_IC-401
CAP_ERROR
RB401
10k
DEW_AD
0.1u
C417
0.1u
C420
REC_PROOF
15P
CN404
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0.001u
C437
CL
10P
CN402
1PG
2FG-PG_COM
3FG
4COM
5W
6W
7V
8V
9U
10U
D_2.8V
0.001u
C434
0.001u
C433
LOAD
VC_SO
REG_GND
2.2
R412
REG_GND
(MT_GND)
DRUM_PWM
ME_SW
MT_5V
TAPE_TOP
SREEL_FG
CAP_PWM
HI8_MP_SW
0.01u
C408
16V
CAP_VS
MODE_SW_A
0.001u
C407
50V
XREEL_HALL_ON
CAP_FWD
UNLOAD
LM_LIM_DET
0.047u
C409
10V
2.2
R411
1u
C410
TREEL_FG
TAPE_LED_ON
DRUM_PG
XCC_DOWN
CAP_ON
XVC_SCK
0.1u
C413
MODE_SW_C
VTR_UNREG
DRUM_VS
XRST_VTR
CAP_FG
22P
CN403
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
DRUM_ERROR
2P
CN401
1
2
2.2
R410
0.1u
C415
TAPE_END
DRUM_FG
XX
R406
IC401
TB6550FG(O,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
NC
62
NC
63
D_U
64
D_VS
65
D_V
66
NC
67
D_VS
68
D_W
69
L_OUT1
70
L_VM
71
NC
72
L_OUT2
73
L_PGND
74
C_U
75
C_VS
76
C_V
77
C_VS
78
C_W
79
NC
80
CAPON
UNR32A600LS0
Q401
M
1
A
0.047u
C431
1uC429
0.022uC430
470p
C442
0.1u
C443
1u
C441
XXR430
0
R431
XX
R416
XX
R425
10k
R424
XX
R423
XX
R418
R414
0.01u
C445
C435
2.2u
XX
C440
0.01u
C444
R427
R413
0.01u
C426
XX
C446
XX
C422
XX
C419
XX
C421
XX
C418
XX
C414
XX
C416
0.1u
C423
0.01u
C412
0.01u
C411
0.1u
C404
82
R409
270
R404
0
R405
XX
C405
0.1u
C406
470
R403
XX
C402
0.1u
C401
XX
C403
330k
R402
47k
R401
XXR429
XXR408
XXR407
XX
R428
1u
C424
0.1u
C425
0.1u
C436
0.1u
C439
0.1u
C432
0.022u
C428
EP_13.5V
CAP_FG
MODE_SW_B
XCC_DOWN
HI8_MP_SW
REC_PROOF
MODE_SW_A
ME_SW
MODE_SW_B
DEW_AD
MODE_SW_A
DEW_AD
MODE_SW_C
HI8_MP_SW
REC_PROOF
ME_SW
MODE_SW_C
XCC_DOWN
DRUM_PG_SENS
DRUM_PG
DRUM_FG_SENS
DRUM_FG
DRUM_U
DRUM_V
DRUM_W
LM_-
CAP_W
CAP_V
CAP_U
CAP_ON
CAP_FWD
MR_VCC
CAP_FG
FG1
FG2
UHE+
UHE-
VHE+
VHE-
WHE+
WHE-
HE_VCC
TAPE_TOP
TAPE_TOP_C
TAPE_END_C
TAPE_END
S_REEL_-
SREEL_FG
T_REEL_+
T_REEL_-
TREEL_FG
DRUM_FG
DRUM_PG
TAPE_TOP
TAPE_END
SREEL_FG
TREEL_FG
CAP_FWD
CAP_FG
CAP_ON
LM_-
LM_+
DRUM_PG_SENS
FG_PG_COM
DRUM_FG_SENS
DRUM_COM
DRUM_W
DRUM_V
DRUM_U
WHE-
WHE+
VHE-
VHE+
UHE-
UHE+
HE_VCC
CAP_V
CAP_W
CAP_U
FG2
MR_VCC
FG1
T_REEL_-
T_REEL_+
S_REEL_+
S_REEL_-
TAPE_END_C
TAPE_TOP_C
S_REEL_+
LM_+
DRUM_COM
FG_PG_COM
CAP_W
CAP_W
DEW
T_REEL(+)
M-SW(A)
VH+
FG1
VH-
FG VCC
TAPE_TOP(C)
CAP_U
REG_GND
TEPE_END(C)
TAPE_LED(K)
REG_GND
T_REEL(-)
HW1
TAPE_LED(A)
REC_PROOF
ME/MP
LM(+)
M-SW(C)
S_REEL(-)
M-SW(B)
S_REEL(+)
CAP_V
HW2
FG2
HALL_COM
HU1
HU2
HV1
HI8_MP
C_LOCK_SW
CAP_V
SENSOR_VCC
CAP_U
HV2
LM(-)
LED DRIVE
LOADING
FP/PG
MECHANISM
MOTOR
(SENSOR)
MECHANISM
DRUM
M901
BLOCK
(PAGE 4-33)
M903
(CAPSTAN MOTOR)
MOTOR
BLOCK
M2100:
M2101:
IC401
DRUM/CAPSTAN/LOADING
MOTOR DRIVE
6
C
H
3
L
7892
XX MARK:NO MOUNT
154
I
10 11
G
F
D
K
13 14
J
05
5
SERVO (SB BLOCK)
16
E
B
12 17
M2100
/M2101
MECHANISM
DECK (2/2)
(PAGE 4-33)
REC/PBREC
Capstan speed servo
Drum servo(speed and phase)
PB
Drum phase servo
Capstan servo(speed and phase)
Drum speed servo
SIGNAL PATH
10k
0
R413,R427
47k
R414
15k
VC-341 BOARD (5/10)
4700p
C427
15k
R426
For Schematic Diagram
• Refer to page 4-43 for printed wiring board.
4-2. SCHEMATIC DIAGRAMS
VC-341 BOARD SIDE A VC-341 BOARD SIDE B
4-2. SCHEMATIC DIAGRAMS
VC-341 BOARD SIDE A VC-341 BOARD SIDE B
4-17 4-18
VC-341 (5/10)
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