DMW-FL28PP / DMW-FL28E
6 | SERVICE HINT | ||
|
|
| |
| Malfunction content: | Not oscillated. | |
| Symptom: | 1. Not oscillated when the power switch is ON. | |
|
|
| 2. Oscillated when shorting both terminal of CUT1, charging voltage is up to 150 - 250 V and then shorting. |
|
|
| 3. Normal charging is performed by shorting CUT1 but flash repeatedly comes to above symptom. |
|
|
| 4. Also comes to above symptom after flashed properly. |
| Cause: | T1 is rare shorting and disconnection of CUT1. | |
| Service point: | Replace T1 and CUT1. | |
| Remarks: | The bond which is fixed to CUT1 is lost color to brown, it may be heated Q1 and Q2. Replace Q1 and Q2 commonly. | |
|
|
| After replacing CUT1, Q1 and Q2, bond these parts and fixed. |
|
|
| |
| Malfunction content: | Not oscillated. | |
| Symptom: | 1. Not oscillated when the power switch is ON. | |
|
|
| 2. When shorting both terminal of CUT1, oscillation is performed normally. (Also flash is normal) |
| Cause: | Disconnection of CUT1. | |
| Service point: | Replace CUT1. | |
| Remarks: | The bond which is fixed to CUT1 is lost color to brown, it may be heated Q1 and Q2. Replace Q1 and Q2 commonly. | |
|
|
| Not lost color to brown is only malfunction of CUT1. No replacement of Q1 and Q2 is required. After replacing CUT1, |
|
|
| Q1 and Q2, bond these parts and fixed. |
|
|
| |
| Malfunction content: | Not flashed. | |
| Symptom: | 1. Normal oscillation and charging is performed when the power switch is ON. | |
|
|
| 2. Not flashed. (test flash button, shoe, sync cord and SLAVE mode) |
|
|
| 3. Output voltage of X terminal is normal. (Approx. 5 V is output at (+) terminal of C17.) |
|
|
| 4. The voltage of SCR2 anode terminal is less than 280 V. (Almost the voltage is 0 - 230 V.) |
| Cause: | C15 is shorted. (It can be confirmed by tester.) | |
| Service point: | Replace C15. | |
When C.B.A. (A) is removed from main case (D), charging is performed by shorting between 2 points shown below.
Malfunction content: | Not flashed. |
Symptom: | 1. Normal oscillation and charging is performed when the power switch is ON. |
| 2. Not flashed. (test flash button, shoe and sync cord) Lighted. (SLAVE mode) In this case, it cause the sync circuit is |
| malfunction. Trigger and flash circuit is not malfunction. |
| 3. Output voltage of X terminal is abnormal. (Approx. 5 V is not output at (+) terminal of C17.) |
Cause: | RQ4 is shorting. |
Service point: | Replace QR4. |
| |
Malfunction content: | Oscillated when the power switch is changed to OFF. |
Symptom: | 1. Oscillation and charging is performed when supply the power at the condition the power switch is OFF. But pilot |
| lamp is not lighted and flashed. |
| 2. When the power switch is ON after above symptom, normal operation for oscillation, charging, lighting and flashing |
| is performed. |
| 3. When the power switch is OFF after symptom 2, it occurred symptom 1. |
Cause: | Q3 is shorting. |
Service point: | Replace Q3. |
23
