Toshiba RAS-M10UKV-E3 Service Manual page 98

10-8-5. Checking Method for Each Part
No. Part name
1 Electrolytic capacitor
(For raising pressure,
smoothing)
2 Converter module
3 IGBT module
1. Turn OFF the power supply breaker.
2. Discharge all four 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
C12, C13, C14, C15 → 500µF/400V
1. Turn OFF the power supply breaker.
2. Discharge all four capacitors completely.
3. Check that the normal rectification characteristics are shown in continuity
test by the tester.
+ ~ – ~
1 2
Diode check
Tester rod
Resistance value
– in good product
+
~
1
–
~
2
~
50k or more
1
+
(0 in trouble)
~
2
~
1
E
~
2
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
MCC-1359
Soldered
surface
A E G
+ ~
Tester rod
+
~
G
–
BW
W
BZ
+ +
U V
– –
U V W
1M or more 100k to 300k
Case that product is good
Pointer swings once, and
returns slowly.
When performing test once
again under another polarity,
the pointer should return.
Mark
– ~
A E
1 2
IGBT check
Resistance value
in good product
–
E
50k or more
2
(0 in trouble)
E
W V U
BZ BY BX BW BV BU
–
W U V
+
W U V
200k to 300k
G
+
W