Acer R-1200 Wartungshandbuch PDF herunterladen (Seite 14)

R-1200

R-1201

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

1. Disconnect the power supply cord, and then remove outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. If the capacitor is open, no high voltage will be available to the magnetron. Disconnect input leads

and check for short or open between the terminals using an ohmmeter.

Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate

continuity for a short time and should indicate an open circuit once the capacitor is charged. If the

above is not the case, check the capacitor with an ohmmeter to see if it is shorted between either of

the terminals and case. If it is shorted, replace the capacitor.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

7. Reconnect the power supply cord after the outer case is installed.

8. Run the oven and check all functions.

D HIGH VOLTAGE CAPACITOR TEST

E CAVITY TEMPERATURE FUSE TEST

1. Disconnect the power supply cord, and then remove outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. A continuity check across the temperature fuse terminals should indicate a closed circuit unless the

temperature of the temperature fuse reaches approximately 302˚F(150˚C).

An open temperature fuse indicates overheating of the oven, exchange the temperature fuse and

check inside of oven cavity and for improper setting of cooking time or operation of control unit. Check

for restricted air flow through the vent holes of the oven cavity, especially the cooling fan and air guide.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

7. Reconnect the power supply cord after the outer case is installed.

8. Run the oven and check all functions.

MAGNETRON TEMPERATURE FUSE TEST

1. Disconnect the power supply cord, and then remove outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. A continuity check across the temperature fuse terminals should indicate a closed circuit. If the

temperature of the magnetron reaches approximately 302˚F(150˚C), the temperature fuse opens. An

open temperature fuse indicates overheating of the magnetron. Exchange the temperature fue and

check for restricted air flow to the magnetron, especially the cooling fan air guide.

5. Reconnect all leads removed from components during testing.

C HIGH VOLTAGE RECTIFIER TEST

1. Disconnect the power supply cord, and then remove outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

4. Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance

across the terminals and observe, reverse the leads to the rectifier terminals and observe meter

reading. If a short is indicated in both directions, or if an infinite resistance is read in both directions,

the rectifier is probably defective and should be replaced.

5. Reconnect all leads removed from components during testing.

6. Reinstall the outer case (cabinet).

7. Reconnect the power supply cord after the outer case is installed.

8. Run the oven and check all functions.

NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts.

(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO

MEASURE THE FILAMENT AND HIGH VOLTAGE.)

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 39 40

Kommentare zu diesen Handbüchern

Keine Kommentare

Acer R-1200 Wartungshandbuch Seite 14

Kommentare zu diesen Handbüchern