Toshiba RAS-4M23SAV-E Service Manual page 98

11-9-5. Checking Method for Each Part
No. Part name
1 Electrolytic capacitor
(For raising pressure,
smoothing)
2 IGBT module
1. Turn OFF the power supply breaker.
2. Discharge all three capacitors completely.
3. Check that safety valve at the bottom of capacitor is not broken.
4. Check that vessel is not swollen or exploded.
5. Check that electrolytic liquid does not blow off.
6. Check that the normal charging characteristics are shown in continuity test by
the tester.
C10 C11
C10, C11, C12, C13 → 500µF/400V
1. Turn OFF the power supply switch.
2. Discharge all four electrolytic capacitors completely.
3. Execute continuity test with a tester.
+
BU BV
U V
BX BY
–
+
Tester rod
–
Case that product is good
– 98 –
Checking procedure
C12 C13
Case that product is good
Pointer swings once, and returns
slowly. When performing test
MCC-1438
once again under another
Soldered
polarity, the pointer should return.
surface
–
BZ BY BX
BW
W
BZ
+
U V W
–
U V W W U
1M or more 100k to 300k
+
W V U
BW BV BU
–
U V W
+
V
200k to 300k