Hitachi RPI-0.8FSG1 Service Manual page 124

TROUBLESHOOTING
(c) By touching the - side of the tester to the - terminal of
the diode module and the + side of tester to the
~ terminals (3 Nos.) of the diode module, measure
the resistance. If all the resistances are from 5 to
50 kΩ, it is normal.
(d) By touching the + side of the tester to the - terminal
of the diode module and the - side of tester to the
~ terminals (3 Nos.) of the diode module, measure
the resistance. If all the resistances are greater than
500 kΩ, it is normal.
(4) Checking Procedures ISPM (In Case of 24 and 30HP)
Internal Circuit of ISPM
R
S
T
(a) By touching the + side of the tester to the P1 terminal
of ISPM and the - side of tester to R, S and T of
ISPM, measure the resistance. If all the resistances
are more than 100 kΩ, it is normal.
(b) By touching the - side of the tester to the P1 terminal
of ISPM and the + side of tester to R, S and T of
ISPM, measure the resistance. If all the resistances
are more than 1 kΩ, it is normal.
1-114
P1
Remove all the terminals of the ISPM before check.
If items (a) to (h) are performed and the results are
satisfactory, ISPM is normal. Measure it under
1 kΩ range of a tester. Do not use a digital tester.
N
PC208 PC207
CN8
CN9
CN207 CN206
C
TB2
RB
R201
N
R200
P1
P
LED201
ZN20
+
P1
-
ZN202
TB3
R216
R215
RB PD P N
R S T U
R, S, T
PC208 PC207
CN8
CN9
CN207 CN206
C
TB2
RB
R201
N
R200
P1
P
LED201
ZN20
+
P1
-
ZN202
TB3
R216
R215
RB PD P N
R S T U V
R, S, T
V W
W