Acer R-1200 Wartungshandbuch PDF herunterladen (Seite 16)

R-1200

R-1201

I BLOWN MONITOR FUSE TEST

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 monitor fuse is blown when the door is opened, check the secondary interlock relay, primary

interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches before

replacing the blown monitor fuse.

CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE SECONDARY INTER-

LOCK RELAY, PRIMARY INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONI-

TOR SWITCH FOR PROPER OPERATION.

If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must

be replaced with "monitor fuse and monitor switch assembly" part number FFS-BA016/KiT, even if

the monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised

of a 20 ampere fuse and switch.

5. Reconnect all leads removed from components during testing.

6. Re-install the outer case (cabinet).

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

8. Run the oven and check all functions.

When the monitor switch actuator is pushed by a screw driver through the lower latch hole on the front

plate of the oven cavity with the door opened (in this condition the plunger of the monitor switch is

pushed in), the meter should indicate an open circuit. If improper operation is indicated, the switch

may be defective. After testing the monitor switch, reconnect the wire lead to the monitor switch

(COM) terminal and check the

continuity of the monitor circuit.

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.

J TOUCH CONTROL PANEL ASSEMBLY TEST

Primary

Interlock Switch

Monitor Switch

Screw Driver

Ohmmeter

Red

White/ White

The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,

unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter

and ohmmeter.

In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key

Unit, and also the Control Unit is divided into two units, LSI Unit and Power Unit, and troubleshooting by

unit replacement is described according to the symptoms indicated.

Before testing,

1) Disconnect the power supply cord, and then remove outer case. Refer to procedure of "

REMOVAL OF OVEN FROM WALL " and " OUTER CASE REMOVAL ".

2) Open the door and block it open.

3) To discharge high voltage capacitor, wait for 60 seconds.

4) Disconnect the leads to the primary of the power transformer.

5) Ensure that these leads remain isolated from other components and oven chassis by using insulation

tape.

1. Key Unit.

NOTE ;

1) Check key unit ribbon connection before replacement.

2) Re-install the outer case (cabinet).

3) Reconnect the power supply cord after the outer case is installed.

4) Run the oven and check all functions.

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