Sony CCD-TRV128 Service Manual page 32

For Schematic Diagram
• Refer to page 4-43 for printed wiring board.
1
2 3
VC-341 BOARD (4/10)
A
REC/PB AMP (RF BLOCK,ER BLOCK)
XX MARK:NO MOUNT
NO MARK:REC/PB MODE
R:REC MODE
P:PB MODE
B
ET481
XX
ET482
XX
C
M2100/M2101
MECHANISM
DECK(1/2)
D
VIDEO HEAD
CN481 11P
GND 1
GND 2
GND 3
CH SP1Y 4
SP1
SP1X 5
E
GND 6
CH SP2X 7
SP2
SP2Y 8
GND 9
FLYNG FE(Y) 10
ERASE
FE(X) 11
F
M2100: TRV128/TRV228/TRV328/TRV428
M2101: TRV228E/TRV428E
ql
IC481 wj,ef> PB
6.1 Vp-p
NTSC: 33.3 msec
PAL: 40 msec
G
H
I
RP_4.6V
J
A_4.6V
FB252
0uH
36
(9/10)
K
FB251
0uH
AU_2.8V
05
REG_GND
4-2. SCHEMATIC DIAGRAMS 4-2. SCHEMATIC DIAGRAMS
4 5 6 7
ws
IC481 6 REC
400 mVp-p
NTSC: 33.3 msec
PAL: 40 msec
L483
22uH
C493
0.1u C498 4.7u
R493 C496
0.01u
2700
R2.5/P0.1
24 23 22 21 20 19 18 17 16 15 14
C482
C481
33u
0.01u
6.3V
R487
27k
R0.9/P0
REC DUMP1
GND
4.6
REC1 OUT
FB481
C488 0.01u 0.7
PB1 IN
4.6
VCC AMP
IC481
C486 0.022u R488 220
2.6
PB DUMP1
C487 0.022u R489
220 2.6
REC/PB AMP
PB DUMP2
1.1 IC481
C484
BIASADJ CXA3265R-T4 YLPFOUT/CARDETOUT
0.01u FB482 C489 0.01u
0.7
PB2 IN
4.6
REC2 OUT
GND
R0.9/P0
REC DUMP2
R484
27k
37 38 39 40 41 42 43 44 45 46 47 48
R2.5/P0.1
R494
2700
C494 C497
0.1u 0.01u
R481
56: TRV128/TRV228
/TRV328/TRV428
39: TRV228E/TRV428E
R481 C485 R490
L482
XX 270
12uH
4.7 RB483
2200
R491 C490 C492
4.7
220 100p 82p
Q482
R483
100 2SA207800LS0 C491
150p
R4.3/P4.7
R4.3/P4.7
R4.1/P4.7
R3.6/P4.7
4 6
Q481
R3.8/P4.7
5
2SA1965-S-TL
0
Q481-483
Q483
ERASE HEAD OSC
R482 UP04601008S0 3 1
560
IC251
EVR
(D/A CONVERTER)
IC251
BH2222FV-E2
4.8
A_4.9V(VCC) CLK
4.8
A_4.9V(VDD2) DI
R3.6/P0.8
REC_Y/MT_CONT DOC_DET
3.3
REC_L_CONT RF_AGC_CONT
2.2
MT_F0 RP_IR
4.7
XRF_AGC_OFF AFC_F0_ADJ
4.7
XMP/ME FRQ_TUNE
CFG_DUTY REC_BIAS
C252
1.5M_DEV
0.8
4.7u
1.5M_DEV MT_Q
AU_BPF 2
AU_BPF HALL_REF
BEEP_EVR HALL_GAIN
A_FADE 0
A_FADE HALL_OFFSET
2.9
D_3.2V(VDD1) SWP(SEL)
GND STB(LD)
C251
1u
4-15
8 9 10 11
wa w;
IC481 9 PB IC481 qa PB
400 mVp-p 150 mVp-p
NTSC: 33.3 msec
PAL: 40 msec H
C504
XX
R4.5/P3.5
Q485
C513
UNR31A500LS0
0.47u
SWITCH 4.7
0
13 0
Q484
RB482
UNR32A300LS0
470k
AGC SLOW
2.5
DOC_DET
R0/P1.3
CLPFOUT
R4.5/P3.5
C509
AGC TC
4700p
R1.5/P2
RF AGCOUT
R2.2/P2.4
RP_IR
0
DOP
2.2
Y/C/ATF IN
0
C508
C507
2.6 0.01u
0.001u
Y MIX
R3.6/P0.8
C514
REC_Y/MT_CONT
0.01u
4.7
VCC3
0
AFM IN
C515
0.01u
C510
XX
C511
XX
C505
0.01u
16V
L484
220uH
RB481
22k
C503
XX
C500
R492 33k
0.1u
R2/P4.7
2
R1.4
/P2.4 C495
R1.2/P2.8 100p
2.5
XVC_SCK
0.5
VC_SO
2.4
3.9
2.3
2.1 AFC_F0_ADJ
2.5 FRQ_TUNE
1.1
0.5
0.9 HALL_REF
0.8 HALL_GAIN
1.2 HALL_OFFSET
1.4
0 DA_STRB
CCD-TRV128/TRV228/TRV228E/TRV328/TRV428/TRV428E
12
13 14
SIGNAL PATH
VIDEO SIGNAL
VIDEO/AUDIO/
AUDIO
SIGNAL
CHROMA Y Y/CHROMA
REC
PB
REC REC/PB
Ref.signal
3.9
AGC_SLOW
RP_PB_MODE
37
DOP
(6/10)
BOTH_REC
XFE_ON
RF_SWP
DOP
19
REC_RF
PB_C_RF
(2/10)
RF_AGC_OUT
13
PB_C_RF
(1/10)
1.5M_DEV
1.5M_DEV
AU_BPF
AU_BPF
38
A_FADE
A_FADE
(8/10)
PB_RF
REC_AFM
39
PB_RF
REC_2
(10/10)
VC_SO
40
VC_SO
XVC_SCK
XVC_SCK
(6/10)
DA_STRB
42
DA_STRB
(6/10)
HALL_GAIN
HALL_GAIN
33
HALL_OFFSET
HALL_OFFSET
HALL_REF
(3/10)
HALL_REF
FRQ_TUNE 2
FRQ_TUNE
(1/10)
18
AFC_F0_ADJ
AFC_F0_ADJ
(2/10)
4-16
15 16
VIDEO/SERVO
SERVO
SIGNAL
SIGNAL
PB
VC-341 (4/10)