Panasonic NN-F623MF, Service Manual

Page: 23 / 52

DO NOT try to REPAIR H.V. Inverter power supply (U).Replace complete H.V. Inverter(U) Unit.
DANGER HIGH VOLTAGE
Test if failure codes of H97 or H98 appear by doing the following procedure. It is recommended to
use an AC line input current Ampere meter for testing.
Test1
1. Program DPC.
A. Tap Clock Keypad
B. Tap Timer Keypad
C. Tap Start Keypad
D. Tap Micro Power Keypad
2. Place 1 liter of water load into oven cavity.
3. Unplug 2 pin H.V. lead wire connector CN703 from magnetron tube.
4. Program oven at High power for 1 minute and press start.
A. After approximately 23 seconds, oven stops.
B. During oven operation, input current is approximately 0.5 to 1A.
If both a and b are OK, proceed to test 2.
INPUT AMPERE FAILURE CODE
Unplug CN703 0.5 to 1A Oven stops in
23 seconds
after started.
Test2
Continued from Test 1
1. Unplug 3 pin connector CN701. CN703 remains unplugged.
23