FILE NO.
11-8-5. Checking Method for Each Part
No. | Part name |
| Checking procedure |
1 | Electrolytic capacitor | 1. Turn OFF the power supply breaker. | |
| (For boost, smoothing) | 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. |
|
| side | C12 C13 C14 |
|
| Case that product is good | ||||||
|
| IGBT |
|
|
|
|
|
|
|
|
| Pointer swings once, and returns slowly. |
|
|
|
|
|
|
|
|
|
|
|
| |
|
| sink |
|
|
|
|
|
|
|
|
| When performing test once again under |
|
|
|
|
|
|
|
|
|
| another polarity, the pointer should return. | ||
|
|
|
|
|
|
|
|
|
|
| ||
|
| Heat |
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
| surface |
|
| |
|
|
|
|
|
|
|
|
|
| Soldered |
|
|
|
| C12, C13, C14 → | ||||||||||
|
|
|
|
| ||||||||
2 | Diode block | 1. Turn OFF the power supply breaker. |
|
| ||||||||
2.Completely discharge the four electrolytic capacitors.
3.Remove the diode block from the P.C. board (which is soldered in place).
4.Use a multimeter with a pointer to test the continuity, and check that the diode block has the proper rectification characteristics.
1 | + |
|
| Tester rod | Resistance value | ||||
|
|
|
|
|
| + |
| – | in good product |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ~ | 2 |
|
|
~ |
| ~ | + ~ ~ – | + 1 |
| ||||
| ~ |
|
| ||||||
3 |
| 2 |
| 3 |
| ∞ | |||
|
|
|
|
| 1 2 3 4 | – |
| ~ 2 | |
|
|
|
|
|
|
| |||
|
|
|
|
|
| 4 |
|
| |
– | 4 |
| (DB01) | ~ 3 |
| ||||
|
|
|
| ||||||
|
|
|
|
|
| ||||
10 to 20 Ω when the multimeter probe is reversed
– 88 –