Sony DSR-250 Service Manual page 104

DSR-250/250P
For Schematic Diagram
• Refer to page 4-63 for printed wiring board.
• Refer to page 4-123 for waveforms.
2 3
1
VI-156 BOARD(12/25)
REC/PB HEAD AMP
A
-REF.NO.: 10000 SERIES-
XX MARK:NO MOUNT
NO MARK:REC/PB MODE
R :REC MODE
P :PB MODE
B 107
TO(25/25) RP_4.6V
108
TO(25/25) TRF_2.8V
C
6
TO(25/25) REG_GND
FB101
15
TO(25/25) D_1.9V
D
SW_PS
SW_PS
ALL_PS
ALL_PS
CTRL1
CTRL1
CTRL0
CTRL0
RECA2
RECA2
RECA1
RECA1
RECCK
RECCK
RECDT
RECDT
E
PLLSW
PLLSW
PLLMSK
PLLMSK
59 TO(5/25)
PBCK
ADDT0
F
ADDT1
ADDT2
ADDT3
ADDT4
ADDT5
G
DRP_SO
DRP_SO
XDRP_SCK
73
TO(9/25) XDRP_SCK
XCS_TRF
XCS_TRF
H
REC_CRRT0
REC_CRRT0
77
TO(9/25) REC_CRRT1
REC_CRRT1
SWP
46
TO(9/25) SWP
106
TO(10/25) REEL_EVR
105
TO(11/25) CFG_DUTY
I
RF_MON
109
TO(22/25)
RF_IN
J
16
REC/PB HEAD AMP
VI-156 (12/25)
4 5 6 7
R126 R125
0 0
L102
L101 L103
10uH 10uH 10uH
C105 C107
C109
22u
1u 10u
10V 4V 10V
TA
R103
Q102
C106
10k
2SB1462J-QR(K8).SO
0.01u
B
C112 C113
R0/P2.7
0.01u 47p
B CH
2.1
C103 R104
0.01u 6800
B
12 11 10 9 8 7 6 5 4 3 2 1
R107
150k
C102
0.01u
R0/P2.3
B
CLK CP TC1
R0.1/P1.0
AD D VCC F GND
5.0 0
DATA0 R REF2
R0.2/P1.1 IC101 0
DATA1
R REF3
1.7
R0.2/P1.1
DATA2 DECUP
EQ_PLL
R0.2/P1.1
A/D CONVERTER
DATA3 F VCC
R0.2/P1.1 R2.5/P3.0 3.0
DATA4 IN
IC101
R0.2/P1.1
CXA2071R-T4
DATA5
TESTIN
R0.2/P1.1 R3.0/P0
AD D GND DC_TC2
XDRP_SCK
XSCK DC_TC1
R0/P3.0
VDD AGC GND
DRP_SO 1.9
SI AGCTC2
0 R3.7/P2.5
25 26 27 28 29 30 31 32 33 34 35 36
C104
0.1u
B
C108 C111
C110
0.01u 470p
0.01u
B
B B
R105
0
R127
68
4-35
8 9 10 11
C118
47p
CH
C126
C125 R114
XX
0.01u 10k
B
C116
0.033u
B
R113
4700
R110
470
C121 0.1u B
R0/P2.0
CO
C122 0.1u B
C120 R0/P2.0
0.01u CE
R108 12k R112 12k
B R4.3/P2.6
PBYOUT
R109 10k 4.9
VCC2
C114 0.1u C123
B
0.01u PB X OUT
B
GND
RECA2 R1.7/P0
RECA2
2.9
VCC3
C119 RECA1 R1.8/P0
0.01u RECA1
SW_PS R1.8/P0
B
PBSW_PS
CTRL0 0.8
C124
CONT0
0.01u
CTRL1 1.8
B
CONT1
C115
470p
B
C117
R106
0.01u
1M
B
ALL_PS
RECCK
RECDT
12 13 14
SIGNAL PATH
VIDEO SIGNAL
CHROMA
REC
PB
SIGNAL PATH
Ref.signal
R116
R117
9.1k 8.2k
± 0.5% ± 0.5%
B
R119
XX
± 0.5%
24 23 22 21 20 19 18 17 16 15 14 13
R3.3/P1.6
YL
R3.3/P1.6
58
XL
R121
D1L XX
± 0.5%
IC102 R1.2/P1.4
GND
R122
D2O 220
REC/PB HEAD AMP ± 0.5%
R3.6/P1.6
CXA2072R-T4 YO
IC102 R3.3/P1.6
XO
R3.3/P1.6 R123
59
DIO 220
± 0.5%
R3.6/P1.6
GND
R124
D2E 220
± 0.5%
R3.6/P1.6
YE
60 61
R3.3/P1.6
XE
R3.3/P1.6
37 38 39 40 41 42 43 44 45 46 47 48
R120
220
± 0.5%
C127 C128
0.1u 0.1u
B B
4-36
15 16 17
AUDIO
Y Y/CHROMA SIGNAL
REC REC/PB PB
DV MD BLOCK
(2/2)
R MECHANISM
CN101 10P VIDEO HEAD
1 GND
2 YSDL
SDL
3 XSDL
4 GND
5 YODD
ODD
6 XODD
7 GND
8 YEVEN
EVEN
9 XEVEN
10 GND
LND101
A
LND102
A
LND103
A
LND104
A
LND105
A
LND106
A