Sony DSR-250 Service Manual page 83

DSR-250/250P
3-6. POWER BLOCK DIAGRAM (1/4)
IN-057
CN243
BOARD
2
(SEE PAGE 4-119)
J9001 1
CB241
DC IN
CN241
3 8
4 9
Q241-243
1
2
5
6
CN242
1
BT901
BATTERY
TERMINAL
2
LIGHT UNREG 12V 3
4
DC-095 BOARD
(SEE PAGE 4-119)
CN282 4
1
DC OUT
(12V)
1
2
CN281
16
3-11
( ) : Page No. shown in ( ) indicates the page to refer on the schematic diagram.
CN303
2
1
Q308
L302 SWITCHING L310
8
9
IC301
D301
DC/DC
CONVERTER
Q303,304
1
OUT DRIVE
R302
2
VCC
INPUT 4
(4-120)
PS303 L301 SWITCHING
IC302
Q306,307,309
DC/DC
CONVERTER
Q305
1
OUT BUFFER
2
VCC
INPUT 4
(4-120)
3
4
Q319
IC303 SWITCHING
Q314, DC/DC
313 CONVERTER
Q316,317
OUT 1 DRIVE
F307
CN304 INPUT 4
2 VCC
1
7
RT
Q318
6
DTC
2 GND
8
(4-120)
Q321
PS304
PS302
F301
F302
F303
F304
F305
CN305
Q310
Q320
L304 L306
RIPPLE
FILTER
D302
CN302
RECT
Q322
DRIVE
RIPPLE
FILTER
Q315
Q311,312
SWITCHING
DRIVE Q323
RIPPLE
FILTER
CN306
L309
CN301
4
VCC
D305
IC304
10
OVER CURRENT
3
PROTECT
7
GND
R351
11
(4-120)
DD-146 BOARD
3-12
POWER CONT
1
LIGHT CONT
2
HI UNREG
3
UNREG +12V
4
TO
+8.4V 1 POWER
5 BLOCK
(2/4)
+8.4V 2
(VI-156)
6
(SEE PAGE 3-13)
+8.4V 3
7
+8.4V 4
8
+8.4V 5
9
EVF +12V
1
TO
POWER
BLOCK
(4/4)
MIC +48V (ME-019)
3
(SEE PAGE 3-17)
CH1 +48V
1
TO
POWER
BLOCK
(4/4)
(XL-003)
CH2 +48V
2
CN482
LIGHT OUT
1 1 1
LIGHT
LIGHT GND
2 2 1
CN481 CN483
VL-034
BOARD
(SEE PAGE 4-120)