Toshiba RAS-10YAV-E Service Manual page 57

10-8-5. Checking Method for Each Part
No. Part name
1 Electrolytic capacitor
(For raising pressure,
smoothing)
2 Converter module
Checking procedure
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.
C12 C13 C14 C15
C12, C13, C14 → 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.
+ ~ – ~
A E
1 2
Diode check
Tester rod
Resistance value
in good product
+ –
~
1
–
~
2
50k or more
~
1
(0 in trouble)
+
~
2
~
1
E
~
2
– 57 –
Case that product is good
Pointer swings once, and
returns slowly. When
performing test once again
MCC-808
Soldered
under another polarity, the
surface
pointer should return.
Mark
G
+ ~ – ~
A
1 2
IGBT check
Tester rod
+ –
~
2
E
G
~
1
A
~
2
E G
Resistance value
in good product
50k or more
(0 in trouble)