Hitachi RAM-60QH4 Manuel De Service page 142

TROUBLESHOOTING OF THE SYSTEM POWER MODULE
Type
Element circuit
Internal circuit
of the module
Terminal
symbol of
system module
※See next page
for values
measured by
tester
◯
＋
PGU
u
NGU
◯
−
P1
L2 L1
※ Do not disassemble the system power module when troubleshooting is performed.
GT15V31ISM
Collector
Base
Emitter
PGV
V
NGV
N1 P2
1
W
– 154 –
PGW
W
NGW
U
5
V