Sony DCR-TRV940 Service Manual page 13

DCR-TRV940/TRV940E/TRV950/TRV950E
COVER
COVER
For Schematic Diagram
• Refer to page 4-93 for printed wiring board.
• Refer to page 4-127 for waveforms.
1 2 3
VC-288 BOARD (9/17)
REC/PB AMP(RF BLOCK)
A
XX MARK:NO MOUNT
RP_4.6V
RP_2.8V
96
B
(17/17)
FB1901
D_1.9V
REG_GND
C
SW_PS
SW_PS
ALL_PS
ALL_PS
CTRL1
CTRL1
CTRL0
CTRL0
D
RECA2
RECA2
RECA1
RECA1
RECCK
RECCK
RECDT
RECDT
89
PLLSW
PLLSW
PLLMSK
(7/17) PLLMSK
PBCK
E
C1901
0.01u
ADDT0
ADDT1
ADDT2
ADDT3
ADDT4
ADDT5
F
XVSP_SCK
VSP_SO
VSP_SO
VSP_SO
G 97
XVSP_SCK
XVSP_SCK
(13/17)
XCS_TRF
XCS_TRF
98
REC_CRRT0
REC_CRRT0
REC_CRRT1
REC_CRRT1
(13/17)
SWP
SWP
H
SWP
99
RF_MON
(16/17)
RF_IN
05
VC-288 (9/17)
4-2. SCHEMATIC DIAGRAMS 4-2. SCHEMATIC DIAGRAMS
4 5 6
NO MARK:REC/PB MODE
:Voltage measurment of the CSP ICs
R:REC MODE
and the Transistors with mark,are
P:PB MODE
not possible.
L1901 L1902 L1903
10uH 10uH 10uH
C1904
C1908
C1906
1u 10u
1u
10V
10V
R1901
10k
Q1901
C1905
EC3101C-PM-TL
0.01u
VRB
C1911
C1912
4
0.01u
47p
1
R1902
6800
3 2
C1902
0.01u
R0.9/
P2.5 0 0 R2.9/P2.1
R1904
12 11 10 9 8 7 6 5 4 3 2 1
150k
R0.3/P1 R2.9/P2.1
CLK
CP TC1
4.6
AD D VCC F GND
R0.3/P1.3 R0.5/P1.3 R1906
DATA0 R REF2
R0.3/P1.3 R0.2/P0.7
DATA1 R REF3
IC1901
R0.3/P1.3 R2.3/P1.9
DATA2 DECUP
R0.3/P1.3 2.8
EQ,A/D CONV.,PLL
DATA3 F VCC
R0.3/P1.3 R2.2/P2.7
IC1901
DATA4 IN
CXA2071R-T4
R0.3/P1.3
DATA5 TESTIN
2.8
AD D GND DC_TC2
2.7
XSCK DC_TC1
1.9
VDD AGC GND
0.1 7 R4.3/P2.2
SI AGCTC2
R1903
1M
25 26 27 28 29 30 31 32 33 34 35 36
2.7 R3.4/P2.1
R2.6/
P1.4
C1903
0.1u
C1907
0.01u C1910
R1922
470p
0
C1909
0.01u R1905
68
4-29
VC-288 BOARD SIDE A VC-288 BOARD SIDE A
7 8 9 10
C1924 R1911
C1925
0.01u 10k
XX
C1917
47p
R1910
4700
C1915
0.033u
24
R1908
470
C1920
0.1u
R0.1/P2
CO
C1921 0.1u
R0.1/P2
CE 8
R4.7/P2.4
PBYOUT
4.6
24k 0.5% VCC2
C1922
R1907 10k PB X OUT
0.01u
0.1u
C1913 GND
R1.8/P0
RECA2
RECA2
2.8
9
VCC3
RECA1 R1.8/P0
C1923
RECA1
0.01u
SW_PS R1.9/P0
PBSW_PS
C1918
0.9
CTRL0
0.01u
CONT0
CTRL1 1.9
CONT1
10
C1916
470p
37 38 39 40 41 42 43 44 45 46 47 48
0
C1914
0.01u
ALL_PS
RECCK
RECDT
VC-288 BOARD SIDE B VC-288 BOARD SIDE B
11 12 13
SIGNAL PATH
VIDEO SIGNAL
Y/CHROMA
REC
PB
Ref.signal
R1913 R1914
9100 9100
0.5% 0.5%
R1915
22k
R1920
XX
0.5%
R3.2/P3
23 22 21 20 19 18 17 16 15 14 13
R3.2/P1.7
YL
R3.2/P1.7
XL
3.2 R1921
D1L XX
0.5%
GND
IC1902 R1917
R3.5/P1.7
D2O 220
R3.3/P1.7 0.5%
REC/PB AMP
YO
R3.5/P1.7
IC1902
11 XO
CXA2072R-T4
R3.5/P1.7 R1918
DIO 220
0.5%
GND
R3.5/P1.7 R1919
D2E 220
R3.5/P1.7
0.5%
YE
R3.5/P1.7
XE
4.5 R3.5/P1.7
R1916
220
0.5%
LND192
A
C1926 C1927
0.1u 0.1u
4-30
14 15 16
VIDEO/AUDIO/
AUDIO
SERVO
SIGNAL SIGNAL
REC REC/PB PB
J-
CN1901 10P
MECHANISM
1 GND
(1/2)
2 YSDL
3 XSDL
VIDEO HEAD
4 GND
5 YODD
ODD
6 XODD
7 GND
8 YEVEN
EVEN
9 XEVEN
10 GND