FLASHBAKE
®
/ MICROWAVE OVEN SERVICE PROCEDURES AND ADJUSTMENTS
Form 24694 (April 2001)
Page 30 of 52
TESTING COMPONENTS
Transformer - High Voltage
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AT THE MAIN
CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT
BOX INDICATING THE CIRCUIT IS BEING
SERVICED.
1.
Remove "MAIN COVER.”
2.
Discharge high voltage capacitor by shorting
the terminals of the high voltage capacitor with
an insulated handled screwdriver or insulated
jumper wire.
3.
Label and disconnect lead wires from
transformer.
4.
Normal (cold) resistance readings should be:
A.
Secondary winding . . . Approx. 63.0 ohms
B.
Filament winding . . . Approx. 0.4 ohms
C.
Primary winding . . . Approx. 0.273 ohms
Capacitor - High Voltage
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AT THE MAIN
CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT
BOX INDICATING THE CIRCUIT IS BEING
SERVICED.
1.
Remove "MAIN COVER.”
2.
Discharge high voltage capacitor by shorting
the terminals of the high voltage capacitor with
an insulated handled screwdriver or insulated
jumper wire.
3.
Disconnect lead wires from capacitor.
CAUTION: Check continuity of capacitor with
meter on highest ohm scale.
4.
A normal capacitor will show continuity for a
short time, and then indicate approximately 9.5
Mega ohm once the capacitor is charged.
5.
A shorted capacitor will show continuous
continuity.
6.
An open capacitor will show a constant
9.5Mega ohm, due to the internal 9.5Mega ohm
resistor.
7.
Resistance between each terminal and chassis
should be infinite.
Diode
If the diode is suspected, substitute a known good
diode and operate oven.
Low-Voltage Transformer
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AT THE MAIN
CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT
BOX INDICATING THE CIRCUIT IS BEING
SERVICED.
1.
Remove "MAIN COVER.”
2.
Discharge high voltage capacitor by shorting
the terminals of the high voltage capacitor with
an insulated handled screwdriver or insulated
jumper wire.
3.
Disconnect CN1 primary winding and CN11
secondary winding from control board.
4.
Normal (cold) resistance readings should be:
A.
Primary winding. . . . Approx. 21.4 ohms
B.
Secondary winding:
1)
Between 2 red wires: Approx. 0.80
ohms (7.7VAC)
2)
Between yellow wire and black wire:
Approx. 1.30 ohms (12.4VAC)
3)
Between black wire and white wire:
Approx. 5.0 ohms (19.0VAC)
Keypad
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AT THE MAIN
CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT
BOX INDICATING THE CIRCUIT IS BEING
SERVICED.
1.
Remove "CONTROL PANEL ASSEMBLY.”
2.
Disconnect keypad plug CN3 from control
board.
3.
Check continuity between connections at end
of cable. Use high ohm scale. With meter
connected to pins indicated in chart, depress
pad and release it.
Содержание VFBMW
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Страница 42: ...FLASHBAKE MICROWAVE OVEN ELECTRICAL OPERATION Form 24694 April 2001 Page 42 of 52 SCHEMATIC DIAGRAM ...
Страница 43: ...FLASHBAKE MICROWAVE OVEN ELECTRICAL OPERATION Form 24694 April 2001 Page 43 of 52 ...
Страница 44: ...FLASHBAKE MICROWAVE OVEN ELECTRICAL OPERATION Form 24694 April 2001 Page 44 of 52 WIRING DIAGRAM ...
Страница 45: ...FLASHBAKE MICROWAVE OVEN ELECTRICAL OPERATION Form 24694 April 2001 Page 45 of 52 ...
Страница 50: ...FLASHBAKE MICROWAVE OVEN TROUBLESHOOTING Form 24694 April 2001 Page 50 of 52 TROUBLESHOOTING FLOW CHART ...
Страница 52: ...FLASHBAKE MICROWAVE OVEN F24694 April 2001 Printed in U S A NOTES ...
