Kenwood pds20-18 Service Manual page 14

POWER SUPPLY UNIT (X68-1970-0X)
Vce Voltage
(AC UNIT)
Primary Input
(AC UNIT)
Primary Overvoltage
Detection
IC4(1/2), Q18
Overheat Detection
TS1
OHP Primary OVP
(CONTROL UNIT)
BLOCK DIAGRAM
Power Control
Q1~10
Bleeder Circuit
Q14,16,17,19
IC3(1/2)
Drive Circuit
Q11~13
Overcurrent
Detection Circuit
Q15
OCP
Bleeder Circuit
Q20
MAX CC
Error Amp
IC4(2/2)
Current Detection
Circuit
R46,IC1
+15 -15
+5
Voltage Regulator
IC2
+15 -15 GND -3.5V
MOTHER UNIT
OUTPUT +
OUTPUT-
Control
(CONTROL UNIT)
CC Monitor
(CONTROL UNIT)