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FUNCTION OF KEY SWITCHES
Please read each function key below.
Power Key
Clear Key
6. TEST PROCEDURES AND TROUBLESHOOTING
-DISCONNECT THE POWER SUPPLY CORD FROM THE
WALL OUTLET WHENEVER REMOVING THE CABINET
FROM THE UNIT.
PROCEED WITH TESTS ONLY AFTER DISCHARGING THE
HIGH VOLTAGE CAPACITOR AND REMOVING THE LEAD
WIRES ON THE PRIMARY WINDING OF THE HIGH VOLT-
AGE TRANSFORMER. (SEE FIGURE 2)
A. TEST PROCEDURES
COMPONENT
MAGNETRON
Time Key
CAUTION
CHECKOUT PROCEDURE
1) Check for resistance: Across the filament
terminal of the magnetron with an ohm meter
on Rx1 scale.
2) Check for resistance: Between each filament
terminal of the magnetron and the chassis
ground with an ohm meter on highest scale.
Memory Key
Start Key
Primary
Winding
Figure3
Figure 4
- 4 -
RESULT
Normal reading:
Less than 1 ohm.
Normal reading:
Infinite ohms.
Secondary
windings
Filament
windings
Figure 2
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