Schematic Diagram - Main Board - Sony CX-LEM550 Service Manual

7-5. SCHEMATIC DIAGRAM — MAIN BOARD —
MAIN BOARD
R
MD
L
L-CH
REC/PB
HEAD
R-CH
ERASE
HEAD
5
Q344, 345
BIAS OSC
0
<6.5> 0
<0.3>
0
<0.2>
0
<0.2>
0 0
<6.5> <9.9>
0
2SD1387-3
<6.5> KTA1266GR-AT 10.0
0
<6.3>
0
Q346-348 <7.1>
REC BIAS
SWITCH
10.0 <0>
0 <1.9>
• See page 28 for Waveforms. • See page 31 for IC Block diagram.
0 0 0 0 0 0 0 0 0 0 0 0
IC302
INPUT SELECT
ELECTRICAL VOLUME
0 0 0 0 0 0 0 0 0 0 0
4.6
100P
100P
47/35V
47/35V
UDZ-TE-17-4.3B
2.5 <-7.1>
2SK2158-T2B
0 <-20.6>
0
0
2SK2158-T2B
2.8
0 <-20.6>
2.5
<-7.1>
2.8
2.5 <-7.1>
2SK2158-T2B KRA303-RTK
1SS133T-77
KRA303-RTK
2.8
<-0.7>
0
0 <-20.6>
2.8 <-0.7>
0
0
Q326-332
REC/PB
2.8
SWITCH
<-0.7>
RD3.3ESB2
CONTROL
G
BOARD
CNB302
(Page 25)
9P
22K
22K
0.068
0 0 0.068
-4.5
0.5
UDZ-TE-17-4.3B
Q333, 338
AC DETECT
1.5 KRC402-RTK
0
KRC402-RTK
0
1/4W 1SS133T-77
Q319, 320
Q317
REGULATOR B+ SWITCH
KTA1273Y-AT
10.0
1N4002B
1N4002B 10.0
9.3
3.6 8.3
(7.5)
0.1
KRC402-RTK
3.1
RD3.9ESB2
1SS133T-77
CONTROL
CD BOARD
C A
BOARD
CN201
CNB303
(Page 19)
(Page 25)
21 21
B
AMP BOARD
CN308
(Page 23)
Q349, 350
FAN MOTOR DRIVE
0
KTC3199GR-TP
1SS133T-77
1.9
1.9
0
47K
0
47K
1SS133T-77
1SS133T-77
1SS133T-77 0.2
0.2
2SC1623-L5L6
2SC1623-L5L6
3.1
Q342, 343
1SS133T-77
DC DETECT
RD3.3ESB2
1SS133T-77
1SS133T-77
3.9
RD3.9ESB2 10.0
Q312-314
9.3 9.3
9.3 REGULATOR
8.5
1.2 9.2
2.0
0.1
0.5
1.2
2SC2120-Y
2.3 56K
2SC2120-Y
0.7
KRC402-RTK
Q311, 315
MAIN POWER
RELAY DRIVE
KTA1266GR-AT KTA1266GR-AT -37.3
-34.1 -34.1
-30.8 -37.3
-41.2
-30.8 -31.5 -34.7
KTA1266GR-AT
KTA1266GR-AT
-38.1
-30.7 -31.5
Q334-337
REGULATOR
NO MARK: FM
( ) : CD PLAY
< > : TAPE REC
CX-LEM550
L
SPEAKER
IMPEPANCE
USE 6-16Ω
R
D
HP BOARD
CNB501
(Page 23)
F
AMP BOARD
CN307
(Page 23)
E
POWER
BOARD
CN903
(Page 27)