8.4.SIMPLE WAY OF H.V. INVERTER/MAGNETRON TROUBLESHOOTING
Purpose:
Simple way (3/37 seconds rule) of identifying whether it’s Magnetron, Inverter or others.
Set-up:
The unit under question is connected through the Ammeter as shown below.
Procedure:
Follow the matrix table below to identify the problem source.
Note:
Do not replace both Inverter board and Magnetron simultaneously and automatically without going through this procedure.
Power will: |
| Ammeter reading is: |
| To do: | Remedy: |
Shut off in 37 seconds | 1. | Between 0.5A and 1.0A. | Check and repair open magnetron circuit | Open magnetron wiring between Inverter | |
after “Start”. |
|
|
|
| and magnetron terminal. |
| 2. | Between 1.0A and 2.0A. | Check continuity of D702 in Inverter PCB. |
| |
|
|
|
|
|
|
|
|
| 1. | D702 shorted | Replace H.V.Inverter(F606Y8M00AP) |
|
|
| 2. | D702 is OK | Replace magnetron |
Shut off in 3 seconds | 1. | Less than 0.5A | Check open circuit: Latch Switch, DPC, | Replace defective component(s), or | |
after “Start” |
|
| Power Relay and CN701 | correct switch, cables and connectors. | |
8.5.H.V.INVERTER BOARD MAIN PARTS LIST (F606Y8M00AP)
Ref. No. |
| Part No. | Part Name & Description | Pcs/Set | Remarks |
DB701 |
| B0FBBS000001 | BRIDGE DIODE | 1 | 20A, 600V |
L701 |
| F50206G00AP | CHOKE COIL | 1 |
|
Q701 |
| B1JAGV000015 | TRANSISTOR SI | 1 | 1000V |
T701 |
| A609A8M00AP | H.V. TRANSFORMER | 1 | (INCLUDING D701,D702,C706,C707) |
C701 |
| ECWF5284N300 | CAPACITOR | 1 | 0.28µF/500V |
C702 |
| ECWF2455N644 | CAPACITOR | 1 | 4.5µF/250V |
22
