Dc/Dc Converter - Sony DCR-TRV820 Service Manual

PC-78 (DC/DC CONVERTER) SCHEMATIC DIAGRAM • See page 4-55 for PC-78 printed wiring board.
1 2 3
A
PC-78 BOARD (4/4)
DC/DC CONVERTER (DD BLOCK)
-REF.NO.:10,000 SERIES-
XX MARK:NO MOUNT
NO MARK:MEMORY REC/PB MODE
B
C
VFI_HD
VFO_HD
VFI_VD
VFO_VD
D
VFI_OE
VFO_OE
VFO_Y0
VFO_Y1
VFO_Y2
VFO_Y3
VFO_Y4
VFO_Y5
E
VFO_Y6
VFO_Y7
VFI_C0
VFI_C1
VFI_C2
VFI_C3
IFI_C0 Hi8/Std8
/M Stick
F
IFI_C1
IFI_C2
IFI_C3
IFI_C4
IFI_C5
IFI_C6
IFI_C7
VFIO_C4
G
VFIO_C5
VFIO_C6
VFIO_C7
XCS_HONEY Hi8/Std8
/M Stick
XDS_WAKEUP
XCS_DS
H
IF_232C_RD
PRINT_HEAD_DDCONT
14 PC-78 BOARD (3/4)
I
KEY_AD5
2
PC-78 BOARD (1/4) P_OPEN
4 PC_D_3.1V
PC_D_3.1V
PC-78 BOARD (1/4) D_2.8V
PC_D_1.9V
8 PC_D_1.9V
PC_D_3.1V
PC_D_3.1V
REG_GND
PC-78 BOARD (1/4)
REG_GND
D_2.8V
PC_D_1.5V
12
PC_D_1.5V
J PC_D_3.1V
PC-78 BOARD (2/4) PC_D_3.1V
REG_GND
REG_GND
13
PC_D_3.1V
PC_D_3.1V
REG_GND
PC-78 BOARD (3/4)
REG_GND
05
4 5 6
VC-235 BOARD(6/16)
CN1104
(SEE PAGE 4-26)
CN801 100P
2 REG_GND REG_GND 1
4 VFI_HD VFI_Y7 3
6 VFO_HD VFI_Y6 5
8 VFI_VD VFI_Y5 7
10 VFO_VD VFI_Y4 9
12 VFI_OE VFI_Y3 11
14 VFO_OE VFI_Y2 13
Hi8/Std8
16 VFO_Y0 VFI_Y1 15
/M Stick
18 VFO_Y1 VFI_Y0 17
20 VFO_Y2 IFI_Y7 19
22 VFO_Y3 IFI_Y6 21
24 VFO_Y4 IFI_Y5 23
26 VFO_Y5 IFI_Y4 25
28 VFO_Y6 IFI_Y3 27
30 VFO_Y7 IFI_Y2 29
Hi8/Std8
32 VFI_C0 IFI_Y1 31
34 VFI_C1 IFI_Y0 33
36 VFI_C2 IFI_OE 35
38 VFI_C3 IFI_VD 37
40 IFI_C0 IFI_HD 39
42 IFI_C1 KASYAON 41
44 IFI_C2 DS_BUSY 43
46 IFI_C3 AFCK 45
48 IFI_C4 SPCK0 47
50 IFI_C5 MS_IN 49
Hi8/Std8
52 IFI_C6 TDI 51
54 IFI_C7 VSP_SO 53
56 VFIO_C4 TCK 55
58 VFIO_C5 VSP_SI 57
60 VFIO_C6 TMS 59
62 VFIO_C7 XVSP_SCK 61
64 XCS_HONEY TD_2-3 63
66 XDS_WAKE_UP XHI_SCK 65
68 XCS_DS HI_SI 67
70 VTR_DD_ON HI_SO 69
72 D_1.5V XSYS_RST 71
74 REG_GND D_1.5V 73
76 REG_GND REG_GND 75
78 REG_GND REG_GND 77
80 D_2.8V D_2.8V 79
82 PC_UNREG PC_UNREG 81
84 IF_232C_RD 232C_ON 83
86 PRINT_HEAD_DDCONT IF_232C_TD 85
88 KEY_AD5 PRINT_SLEEP 87
90 DIAL_B DIAL_A 89
92 REG_GND XDS_FLASH_RST 91
94 REG_GND P_OPEN 93
96 REG_GND REG_GND 95
98 REG_GND REG_GND 97
100 REG_GND REG_GND 99
4-53
7 8 9 10
1 11
PC-78 BOARD (1/4) PC-78 BOARD (2/4)
PC_D_3.1V
PC_UNREG
REG_GND
VFI_Y7
R803
VFI_Y6 10k
VFI_Y5
R805
C805
0.001u 15k
VFI_Y4
C811
C801
VFI_Y3
470p 150p
CH
VFI_Y2
8.7
1.2
VFI_Y1
8 7 6 5 4 3 2 1
VFI_Y0
IFI_Y7
IFI_Y6 IC801
MB3817PFV-G-BND
IFI_Y5
IC801
IFI_Y4
IFI_Y3
DC/DC CONTROL
IFI_Y2
IFI_Y1
IFI_Y0
9 10 11 12 13 14 15 16
IFI_OE 1.5
IFI_VD
VTR_DD_ON
IFI_HD
KASYAON
C824
0.1u
DS_BUSY
C809
0.1u
AFCK REG_GND
SPCK
R801
C803 C807
PC_D_1.9V
2200p 150
0.047u
MS_INSERT
PC_UNREG
TDI
VSP_SO
TCK
TMS
C806 R806
6800p
XX
XVSP_SCK
C802 C812
TDO
XX
470p
CH
XHI_SCK 8.4
HI_SI
8 7 6 5 4 3 2 1
HI_SO
XSYS_RST
D_1.5V
IC802
MB3817PFV-G-BND
IC802
PC_UNREG DC/DC CONTROL
232C_ON
IF_232C_TD 9 10 11 12 13 14 15 16
8.2
VTR_DD_ON
XDS_FLASH_RST
C825
0.1u
C810
0.1u
REG_GND
C808
C804 R802
2200p 0.068u
150
PC_D_1.5V
R816
C821
0
XX
VTR_DD_ON
D_1.5V
DCR-TRV820/TRV820E/TRV820P
11 12 13
10
PC-78 BOARD (2/4)
R811 R813
47k 6800
R809
47k
Q801
CPH6702-TL
L801 SWITCHING L803 L805
8.2
4.7uH
22uH 4.7uH
1
6
2 5 3.2
8.1 3 4
C813
4.7u
C815 C817
4.7u XX C819
10u
6.3V
TA
A
R812 R814
47k
33k
R810
270k
R815
0
Q802
CPH6702-TL
L806
L802 L804
SWITCHING
4.7uH 8.2 4.7uH
22uH
1 6
2
2 5
8
3 4
C814
4.7u
C818
C816 C820
XX 10u
4.7u
6.3V
IC803
XX
NOISE_BY_PASS
VOUT
C823
XX
GND
GND
VIN CONT
C822
XX
4-54
14 15
LND801
R807 0
CHASSIS_GND
D801
XX
LND802
R808 0
CHASSIS_GND
D802 LND803
XX
SHIELD_GND
LND804
SHIELD_GND
SIGNAL PATH
VIDEO SIGNAL
CHROMA Y
REC
PB

DC/DC CONVERTER

PC-78 (4/4)