Sony DCR-PC115 Service Manual page 20

DCR-PC115/PC115E/PC120BT/PC120E
For Schematic Diagram
• Refer to page 4-19 for printed wiring board.
1
VC-270 BOARD(15/18)
DRUM/CAPSTAN MOTOR DRIVE(MD BLOCK)
A
-REF.NO.:20,000 SERIES-
XX MARK:NO MOUNT
TO(16/18,
106
17/18(CN011),
18/18)
B
107 TO(18/18)
C
105
TO(14/18)
D
E
F
108
TO(18/18)
G
H
I
J
K
104 TO(14/18)
L
M
16
DRUM/CAPSTAN MOTOR DRIVE
VC-270 (15/18)
2 3 4 5
VTR_UNREG R408
3300
R406
1
2012
MT_4.9V
R409
82k
L401
EVF_13.5V
10uH
D_2.8V
R402
C401 10k
R403
0.001u
10k
B
REG_GND
UNLOAD
C402
UNLOAD
0.001u C404
LOAD B 0.047u
LOAD
B
LM_LIM_ON TAPE_END_C
LM_LIM_ON END IN
LM_LIM_DET TAPE_TOP_C
TOP IN
LM_LIM_DET
C405
0.047u B
TAPE_TOP TOP OUT
VM
TAPE_LED_ON
C406
TAPE_LED_ON
2.2u F
VCC2
C407
0.1u B
TREEL_FG RLDO2
TAPE_END RLO2
T_REEL_-
RLM2
T_REEL_+
RLP2
GND
S_REEL_+
RLP1
S_REEL_-
RLM1
RLO1
R404
68k
SREEL_FG RLDO1
R401
RSB
XREEL_HALL_ON 4700
XREEL_HALL_ON
N.C.
CAP_PWM
ISNF
DRUM_PWM
C410
0.022u
B
R438
0
DRUM_ERROR
DRUM_VS
CAP_ERROR
R439
CAP_VS
0
C403 C408
C409
R405
6800p 0.022u
6800p
15k
B B B
CAP_V
CAP_U
CAP_W
C432
0.1u
B
36 35 34 33 32 31 30
HE_VCC
VH
N.C.
UHE-
HU-
UHE+
HU+ IC402
WHE-
HW-
WHE+ CAPSTAN MOTOR DRIVE
HW+
VHE-
HV- IC402
VHE+
SC111319VHR2
HV+
CSP(CHIP SIZE PACKAGE)IC
N.C.
CAP_FG
FG_OUT
DRUM_ON
DRUM_ON N.C.
DRUM_START
DRUM_START N.C.
DRUM_FWD
DRUM_FWD N.C.
DRUM_FG
DRUM_FG
DRUM_PG
DRUM_PG
1 2 3 4 5 6 7
R429
1M
R426
100k
CAP_ON
FFREW_UP
CAP_FWD
R434
R427
3300
100k
4-51
6 7 8 9
C411
0.1u
R407
F
1
2012
C415
C414 C418
470p 470p
470p
B B
B C421
0.1u
B
C423
0.1u
B
34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18
AGC
DRUM_ON
STBY D
RF
OSC
SELSLP1
DRUM_START
SELSLP2
R420
IC401
XX
VS
CSLP1
DRUM/LOADING MOTOR DRIVE
CSLP2
VCC1
IC401
C441
LB11950GL-TBM
BRAKE XX
CSP(CHIP SIZE PACKAGE)IC DRUM_FWD
FRC
FILTER
FC
RSAT
GND
DRUM_FG
FGOUT
52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68
DRUM_PG
R416
10k
C412
DRUM_FG_SENS
XX
B FG_PG_COM
R410
R412
2200
DRUM_PG_SENS
0
C416 C419
C420 R437
C413 470p
R411 1u
0.1u 1500
18k XX B
B
B B
1608
R430 C433
2.2 0.1u
1608 B
Q402
C434
R431 2SA2018H-T2L
0.1u
2.2
SWITCH
B
1608
R432 C436 R419
2.2 0.1u 22k
1608 B
C437
0.22u
B
R417
4700
29 28 27 26 25
Q401
R418
EC3201C-PM-TL
100k
SWITCH
N.C.
R433
N.C.
39k
RCC
FG2
FG-
FG1
FG+
MR_VCC
VMR
N.C.
C1H
C1L
C439
N.C. XX
C2L
C2H
C440
XX
8 9 10 11 12
C438
0.1u
B
L402 C435
0.47u
10uH
B
10 11 12 13
DRUM_W
DRUM_V
DRUM_U
R424
DRUM_COM
270
C424
0.1u
B
CN005 10P
DRUM_W
10 DRUM_W
9 DRUM_W
DRUM_V
8 DRUM_V
C422 7 DRUM_V
0.1u DRUM_U
6 DRUM_U
B
5 DRUM_U
DRUM_COM
R421
4 M_COM
1
FG_PG_COM
2012
3 FG/PG_COM
R422
DRUM_FG_SENS
1
2 FG
2012
DRUM_PG_SENS
R423
1 PG
1
2012
C427
0.1u
B
C428 CN006 27P
0.1u LM_+
1 LM_LOAD
B
C429
4700p 2 LM_LOAD
B LM_+
3 LM_UNLOAD
C430
4700p
4 LM_UNLOAD
B
DEW_AD 5 DEW+
C431
0.1u
B 6 DEW-
C425
0.047u MODE_SW_A 7 XMODE_SW_A
B
103
TO(14/18) MODE_SW_B 8 XMODE_SW_B
C426
MODE_SW_C 9 XMODE_SW_C
10V
3.3u
REC_PROOF_SW 10 SW_COM/SW_GND
XCC_DOWN 11 XCCDOWN_SW
12 TAPE_LED_K
13 TAPE_LED_A
82 14 MIC/REC_SW_GND
TO(13/18)
15 XREC_PROOF
CHIME_SCK
16 CHIME_SCK
CHIME_SDA 17 CHIME_SDA
L001
4.7uH
CHIME_VDD
18 CHIME_VDD
R012
33
19 HALL_VCC
T_REEL_+
20 TREEL+
T_REEL_-
21 TREEL-
R011
33
22 HALL_GND
S_REEL_-
23 SREEL-
S_REEL_+
24 SREEL+
TAPE_END_C
25 TAPE_END
26 TOP/END_GND
TAPE_TOP_C
27 TAPE_TOP
:Voltage measurement is impossible
for the CSP ICs and the transistors
that are shown with the
M902
CAPSTAN MOTOR
:The Semiconductors shown by the
CN007 27P
CAP_V cannot be measured of their voltages and
1 CAP_V
waveforms due to machines mechanical stracture.
2 CAP_V
3 CAP_V
4 CAP_V
UHE-
5 UHE-
HE_VCC
6 HE_VCC
UHE+
7 UHE+
VHE+ HALL
SIGNAL PATH
8 VHE+
WHE+
9 WHE+
10 HE_GND
CAP_W
11 CAP_W Drum speed servo
12 CAP_W M
Drum phase servo
13 CAP_W
14 CAP_W Drum servo (speed and phase)
WHE-
15 WHE-
VHE- Capstan speed servo
16 VHE-
CAP_U
17 CAP_U Capstan phase servo
18 CAP_U
Capstan servo (speed and phase)
19 CAP_U
20 CAP_U
21 N.C.
FG1
22 FG1
MR_VCC
23 FG_VCC
24 FG_VCC
FG2 FG
25 FG2
26 FG_GND
27 FG_GND
R428
82k
CFG_DUTY
64
TO(8/18)
4-52
14 15 16
M901
DRUM MOTOR
M
FG/PG
TO
MD BLOCK
(SEE PAGE 4-59)
mark.
mark,
REC REC/PB PB