Read Panasonic NN-ST340W / NN-SM330W / NN-SM330WZPE / NN-ST340WZPE Service Manual online
1 FEATURE CHART
4
2 CONTROL PANEL
4
2.1.
NN-ST340W
4
2.2.
NN-SM330W
5
3 SCHEMATIC DIAGRAM
6
3.1.
NN-ST340W KTE/PTE/KPQ
6
3.2.
NN-ST340W STM
7
3.3.
NN-ST340W ZPE
8
3.4.
NN-SM330W KTE/PTE/KPQ
9
3.5.
NN-SM330W ZPE
10
4 DESCRIPTION OF OPERATING SEQUENCE
11
4.1.
Variable power cooking control (NN-SM330W)
11
4.2.
Variable power cooking control (NN-ST340W)
11
4.3.
Turbo Defrost, Auto Reheat, Auto Cook control (NN-
ST340W)
11
5 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING
12
5.1.
Check the grounding
12
5.2.
Warning about the electric charge in the high voltage
capacitor
12
5.3.
Part replacement.
12
5.4.
When the 10 Amp fuse is blown due to the malfunction of
the short switch:
12
5.5.
Avoid inserting nails, wire, etc. through any holes in the
unit during operation.
12
5.6.
Verification after repair
12
6 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 13
6.1.
Magnetron
13
6.2.
Digital programmer circuit (D.P.C) & Membrane switch
(NN-ST340W)
13
6.3.
Low voltage transformer and/or power relays (RY1) (NN-
ST340W)
14
6.4.
Fan motor
15
6.5.
Door assembly
15
6.6.
Turntable motor
17
7 COMPONENT TEST PROCEDURE
18
7.1.
Primary, Secondary Latch Switch Interlocks
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7.2.
Short Switch & Monitor
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7.3.
High voltage transformer
18
7.4.
High voltage capacitor
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7.5. Magnetron
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7.6.
Diode
19
7.7.
Variable power controller (NN-SM330W)
19
7.8.
Membrane keyboard (Membrane switch assembly) (NN-
ST340W)
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8 MEASUREMENTS AND ADJUSTMENTS
20
8.1.
Adjustment of Primary latch switch, Secondary latch
switch and Short switch.
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8.2.
Measurement of microwave output
20
9 TROUBLESHOOTING GUIDE
21
9.1.
NN-ST340W
21
9.2.
NN-SM330W
23
9.3.
Trouble related to Digital Programmer Circuit (NN-
ST340W)
24
9.4.
How to check the semiconductors using an OHM meter
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10 EXPLODED VIEW AND PARTS LIST
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10.1. EXPLODED VIEW
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10.2. PARTS LIST
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10.3. ESCUTCHEON BASE ASSEMBLY
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10.4. DOOR ASSEMBLY
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10.5. WIRING MATERIALS
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10.6. PACKING AND ACCESSORIES
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11 DIGITAL PROGRAMMER CIRCUIT
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11.1. SCHEMATIC DIAGRAM (NN-ST340W)
33
11.2. PARTS LIST (NN-ST340W)
35
CONTENTS
Page
Page
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NN-ST340W / NN-SM330W
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