Hitachi RAS-50YH4 Service Manual page 105

SYSTEM POWER MODULE DIAGNOSIS
Circuit diagram of
the device
(excepting the
reflux diode)
Circuit diagram of
the module
Terminals symbol
mark of the module
See next page
for measuring
value using
tester
BASE
+
PGU PGV
U V
NGU NGV
–
P1 N1
+ –
L2 L1
– 115 –
Collector
Emitter
PGW
W
NGW
P2 U
W V