5.5. Inverter power supply (U)
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 Power Level 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.
2. Program oven at High power for 1 minute and press start.
a. After approximately 3 seconds, oven stops.
b. During oven operation, input current is approximately
0.4A.
INPUT AMPERE
FAILURE CODE
Unplug CN701
<0.4A
Oven stops in 3
seconds after started.
If both a and b check OK, the Inverter Power Supply (U) can be
determined to be OK.
17
NN-T695 NN-T685SF
Summary of Contents for INVERTER NN-H665
Page 2: ...2 NN T695 NN T685SF ...
Page 3: ...3 NN T695 NN T685SF ...
Page 5: ...1 SCHEMATIC DIAGRAM 1 1 APH 5 NN T695 NN T685SF ...
Page 6: ...1 2 CPH 6 NN T695 NN T685SF ...
Page 7: ...1 3 RPH 7 NN T695 NN T685SF ...
Page 24: ...9 EXPLODED VIEW AND PARTS LIST 9 1 EXPLODED VIEW 24 NN T695 NN T685SF ...
Page 35: ...10 DIGITAL PROGRAMMER CIRCUIT 10 1 NN T695SF APH CPH T695SF SM RPH 35 NN T695 NN T685SF ...
Page 36: ...36 NN T695 NN T685SF ...
Page 37: ...10 2 NN T685SF APH CPH T675SF APH 37 NN T695 NN T685SF ...
Page 38: ...38 NN T695 NN T685SF ...
Page 39: ...10 3 NN T665SF APH T655SF APH T664SFR APH 39 NN T695 NN T685SF ...
Page 40: ...40 NN T695 NN T685SF ...
Page 41: ...10 4 NN H665 APH CPH H635 APH S655 APH S645 APH S615 CPH 41 NN T695 NN T685SF ...
Page 42: ...42 NN T695 NN T685SF ...
Page 44: ...44 NN T695 NN T685SF ...
