Panasonic NN-CD987W User manual

© 2007 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
ORDER NO. MOD0710292C3
Microwave Oven
Model No. NN-CD987W
Model No. NN-CD997S
TABLE OF CONTENTS PAGE PAGE
1 Warning-------------------------------------------------------------- 2
2 Specifications ----------------------------------------------------- 3
3 Location of Controls and Components ------------------- 4
4 Test Mode ----------------------------------------------------------- 5
5 Service Mode ------------------------------------------------------ 9
6 Troubleshooting Guide----------------------------------------10
7 Disassembly and Assembly Instructions ---------------18
8 Schematic Diagram---------------------------------------------21
9 Exploded View and Replacement Parts List -----------26

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1Warning

3
2 Specifications

4
3 Location of Controls and Components
3.1. CONTROL PANEL

5
4 Test Mode
4.1. COMPONENT TEST
PROCEDURE
4.1.1. Primary Latch Switch,
Secondary (Secondary Latch
Switch and Power Relay 1)
Interlocks.
4.1.2. Short Switch / Monitor Circuit
4.1.3. Magnetron (NEW H.V.)
4.1.4. Inverter Power Supply (U)
(NEW H.V.)

6
4.1.5. Steam Sensor and Digital
Programmer Circuit
4.1.6. Oven temp sensor thermistor
4.2. MEASUREMENTS AND
ADJUSTMENTS
4.2.1. Adjustment of Primary latch switch,
Secondary latch switch
and short switch
4.2.2. Measurement of microwave output

7

8
4.3. HOW TO CHECK THE SEMICONDUCTORS USING AN OHM METER

9
5 Service Mode
5.1. OPERATION AND DIGITAL PROGRAMMER CIRCUIT
TEST PROCEDURE

10
6 Troubleshooting Guide
6.1. CAUTIONS TO BE OBSERVED
WHEN TROUBLESHOOTING
6.1.1. Check the grounding
6.1.2. Inverter Warnings (NEW H.V.)

11
6.1.3. When parts must be replaced,
remove the power plug from the
outlet.
6.1.4. When the 10A/15A 250V fuse is
blown due to the operation of short
switch:
6.1.5. Avoid inserting nails, wire, etc.
through any holes in the unit
during operation.
6.1.6. Confirm after repair

12
6.2. TROUBLESHOOTING GUIDE (NEW H.V.)

13

14

15

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17

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7 Disassembly and Assembly Instructions
7.1. DISASSEMBLY AND PARTS
REPLACEMENT PROCEDURE
7.1.1. Magnetron
7.1.2. Digital programmer circuit (DPC)
and membrane key board.
7.1.3. Switching transformer
and/or power relays

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7.1.4. Fan motor
7.1.5. Heater
7.1.6. Door assemble

20
7.1.7. Turntable motor
7.1.8. Inverter PCB