Caple CM140 Manual

CM140
Caple Built in Microwave
Technical information
Technical information

Item Part Code Description Qty
011300410000018 RING 2
012171100000295 Handle 2
A00 12270000004942 ASS'Y CAVITY 1
A01 12570000000067 SPLASH COVER 1
A16/A13 12270000008244 THERMOSTAT BRKT. 1
A17 12270000005573 ASS'Y BRKT HINGE 2
B01 12270000009910 BASE PLATE 1
C00 17270000000313 ASS'Y CONTROL 1
D00 12270000007448 ASS'Y DOOR 1
E01 17470000000806 MAGNETRON 1
E05 17470000003445 H.V.TRANSFORMER 1
E06 17470000000689 H.V.CAPACITOR 1
E07 17470000001007 H.V.DIODE 1
E10+E11 17170000002914 ASS'Y NOISE FILTER 1
E13 17470000000636 LAMP 1
CM140 - Caple Built in Microwave
E14 12270000000200 LAMP COVER 1
E16 17470000000062 POWER CORD 1
E26 11201007000351 TEMPERATURE SENSOR 1
E28/34T,E08 17470000001561 H.V.FUSE 1
E34 17470000001471 THERMOSTAT 180/145Ԩ*H 1
E37 17470000001487 THERMOSTAT 150/90Ԩ*V 1
E48 17470000001483 THERMOSTAT 100/80Ԩ*H 1
G03 17470000001053 METAL HEATER *UPPER 1
G09 12270000006265 HEAT INSULATOR *UPPER 1
G10（36F）12270000003490 Heater holder 2
G10/E50 17470000001085 HEATER *LOWER 1
L03/L12 17470000002315 MICROSWITCH INTERLOCK 1
L03/L12 17470000002315 MICROSWITCH INTERLOCK 2
L04 17470000002299 MICROSWITCH MONITOR 1
L05 17470000001353 #N/A 1
L09 12170000011191 LATCH BOARD *LEFT 1
L10 12170000011190 LATCH BOARD *RIGHT 1
L11 12170000007317 INTERLOCK LEVER 1
L13 17470000001212 HARNESS MAIN -2 1
L14 17470000001462 HARNESS MAIN -3 1
R00 12270000005274 Convection ASS'Y 1
R01 11002017000370 Motor Conv. 1
R02 12270000004607 CONVECTION MOTOR BRKT. 1
R03 12270000005062 COOLING FAN(CONV.) 1
R04 12270000006226 HEAT INSULATOR *Inner 1
R05 12270000006356 BACK HEATER COVER 1
R06 17470000001081 METAL HEATER *Back 1
R08 12270000005066 CONV. FAN 1
R10
12270000006225
BACK COVER
1
R10
12270000006225
BACK
COVER
1

Item Part Code Description Qty
CM140 - Caple Built in Microwave
R11 12470000000021 HEAT INSULATOR *Back 1
R19 12970000000613 PIN COVER 1
R20+R23 12270000003380 INSULATOR HEAT *L 1
R21+R24 12270000003359 INSULATOR HEAT *R 1
R22 12470000000015 #N/A 1
R25 12270000008463 Chamber Over 1
T01/Z33 11002014000043 TURNTABLE MOTOR 1
T01/Z33 11002014000043 TURNTABLE MOTOR 1
T02 12570000000020 COUPLER 1
T05 12970000000342 Grill rack 1
T06 12270000003329 METAL TRAY 1
T07 12970000000345 RACK 1
T10 12270000003378 INSULATOR HEAT ASS'Y * 1
T10(E36L)/R22(34F) 12270000006271 INSULATOR HEAT ASS'Y 1
W01 12270000008100 FAN GUIDE 1
W03 11002017000177 FAN MOTOR/ MOTOR CONV. 1
W09 12270000008430 WIND GUIDE COVER *LOWER 1
W18 12170000000659 VENT MOTOR COVER 1
W23
12170000000631
AIR GUIDE
-
3
1
W23
12170000000631
AIR
GUIDE
3
1
W28/36L,Z42 12270000008147 UPPER BRKT. 1
Z01 12270000006217 H.V.C HOLDER 1
Z03 12170000009443 FILTER BRKT. 1
Z07/Z08 12170000003919 WIRE BINDER 3
Z18/36L,Z28 12270000008421 WIND PROTECTOR 1
Z24 12270000005842 LEFT COVER 1
Z25 12270000005929 Right cover 1
Z26 12270000005627 TOP COVER 1
Z28 12670000000441 MAGNETRON SPONGE 3
Z29（E36L）
/
Z28（34F）12270000008420 1
Z35 12970000000037 WIRE BRKT. 1
Z36/36L,M04 12570000000937 LAMP GLASS 1
Z37/36L,Z36/34F,Z40 12270000008187 FRONT PLATE BRKT. *LEFT 1
Z38 12170000000152 SPACER 1
Z38/36L,Z37/34F,Z41 12270000005547 FRONT PLATE BRKT. *RIGHT 1
Z39 12270000003558 MOUNTING PLATE 2
Z39 12970000000431 胶钉1
Z40 12170000000070 SHAFT RUBBER 1
Z42 12170000000636 Waveguid 1
Z43 12170000000646 DAMP BRKT. 1
Z44 12270000008237 HOLDER 1

CM140
Caple Built in Microwave
Service Manual
Service Manual

REPAIR INSTRUCTION
1SAFETY·································································2
1.1 Danger ·················································································2
1.2 Caution!················································································2
1.3 Leak test (leak detection measurement) ·······························3
COMPONENTS···················································4
High-voltage diode ·····························································4
High-voltage capacitor························································5
High-voltage transformer ····················································6
Magnetron··········································································7
Safety switches ··································································8
REPAIR ·······························································9
Removing the door ·····························································9
Removing the bottom heating system ································ 10
Removing the turntable motor ············································ 11
Removing the cooling fan··················································· 12
Removing the upper heating elements ······························· 13
Removing the hot air motor ················································ 14
Removing the magnetron··················································· 15
FAULT DIAGNOSTICS······································· 16
Troubleshooting plan - fuse is tripping································ 16
Troubleshooting plan - appliance does not function at all ··· 17
Troubleshooting plan - appliance does not start ················· 18
Troubleshooting plan - no microwave power ······················ 19
Troubleshooting plan - input module ·································· 20
Determining the microwave output power··························· 22
Page 1 of 22 pages
2
2.1
2.2
2.3
2.4
2.5
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
4
4.1
4.2
4.3
4.4
4.5
4.6

1 SAFETY
1.1 Danger
Repairs may be carried out by an electrician only!
Improper repairs may endanger and injure the user!
To prevent electric shocks, always comply with the following
information:
• If the appliance is faulty, the housing and frame may be live!
• Do not touch any modules in the appliance, even modules can be
live!
• Before commencing repairs, always disconnect the appliance from
the power supply!
• If tests have to be performed while the appliance is live, always
use a residual-current-operated circuit-breaker!
• The protective conductor connection must not exceed the standard
values! This connection is extremely important for personal safety
and function of the appliance!
• When repairs are complete, conduct a test in accordance with
VDE 0701 or national regulations!
• When repairs are complete, conduct a function test!
• When repairs are complete, conduct a leak rate test!
1.2 Caution!
Always comply with the following instructions to prevent damage to
the appliance or to components:
• Comply with ESD instructions!
• Never attempt repairs by randomly replacing components!
• Always proceed systematically and follow the troubleshooting
instructions!
• Do not test the high-voltage circuit while the appliance is running –
Danger of death -!
• Always discharge the high-voltage capacitor before testing!
Page 2 of 22 pages

1.3 Leak test (leak detection measurement)1.3 Leak test (leak detection measurement)
The leak rate is the microwave energy which escapes despite the
intact sealing systems.
The leak rate is the microwave energy which escapes despite the
intact sealing systems.
The leak rate is measured as an energy density with suitable
measuring instruments at a distance of 5 cm. The unit of
measurement is mW/cm2.
The leak rate is measured as an energy density with suitable
measuring instruments at a distance of 5 cm. The unit of
measurement is mW/cm
The limiting values for the permitted measured values, as well as
the measurement conditions, have been specified in the VDE
regulation 0700/Part 25 and are as follows:
The limiting values for the permitted measured values, as well as
the measurement conditions, have been specified in the VDE
regulation 0700/Part 25 and are as follows:
1.3.1 Normal operation with load1.3.1 Normal operation with load
Setting: maximum power setting of the applianceSetting: maximum power setting of the appliance
Load: 275 cm3waterLoad: 275 cm
Permitted limiting value: 5 mW/cm2Permitted limiting value: 5 mW/cm
Measurement distance: 5 cmMeasurement distance: 5 cm
2.
3water
2
1.3.2 Abnormal operation (no-load operation)
Setting: maximum power setting of the appliance
Load: none (no-load operation)
Permitted limiting value: 10 mW/cm2
Measurement distance: 5 cm
Page 3 of 22 pages

Set to insulation resistance.
2 COMPONENTS
2.1 High-voltage diode
Blocking direction = infinite.
The high-voltage diode can be tested like a standard diode.
Use an EHG tester for this.
• Full continuity in conducting direction.
• Infinite in blocking direction.
Set to insulation resistance.
Conducting direction = full continuity.
Page 4 of 22 pages

2.2 High-voltage capacitor
The high-voltage capacitor can be tested by ‘ohmic’ measurement’
(resistance measurement range 20 ΜΩ).
A correctly functioning capacitor indicates transient continuity.
The resistance then increases proportionally with the load.
A defective capacitor (e.g. short-circuit) indicates permanent
continuity.
The measuring instrument must indicate infinitely between the
connection and housing.
Page 5 of 22 pages

2.3 High-voltage transformer
This transformer supplies the heater voltage for the magnetron and
the operating voltage for doubling the voltage.
• Input voltage 230 V
• Heater voltage approx. 3.3 V
• Operating voltage approx. 2300 V
The operating voltage cannot be measured!!
Heater voltage of
approx. 3.3V
Primary side 230V
of input voltage
Page 6 of 22 pages

2.4 Magnetron
The magnetron can be tested by ‘ohmic’ measurement´ only.
The volume resistance of the terminals F and FA should be less than 1
Ω.
The insulation resistance between the two terminals and the housing
should be infinite.
Measure the resistance with an EHG tester.
Note:
An internal flashover (short-circuit between cathode and anode)
cannot usually be established by taking a measurement.
This is not indicated until the appliance is switched on when high
voltage is applied to the magnetron.
It may also be possible to detect the fault by loud humming noises.
Before installing the magnetron, ensure that the metal seal is ok and is
seated correctly.
Page 7 of 22 pages

4.5.1 Switching sequence
2.5 Safety switches
Each door switch independently switches off the power supply for the
microwave oven when the door is opened.
Microwave ovens usually feature at least three safety switches.
The switching sequence is specified by the arrangement and is as
follows.
These switches are supported by the switch brackets.
The basic function of these switches is to interrupt microwave
generation as soon as the door is opened.
One of the three switches is the short-circuit switch. It monitors one of
the two other switches and actuates the appliance safety device if the
monitored switch does not function.
Switching
sequence
Open door Close door
1.) Safety switch on right Short-circuit switch
2.) Safety switch on left Safety switch on left
3.) Short-circuit switch Safety switch on right
In this case the appliance is disconnected from the power supply and
can no longer be switched on.
Page 8 of 22 pages

3 REPAIR
3.1 Removing the door
2. Remove the eight screws from the housing, and free the
housing from the cavity.
Remove the three screws from the left and right hinges.3.
Page 9 of 22 pages
Disconnect the top hinge from front plate.
Now, the door is free.
1.
4.
5.
Disconnect the power supply cord.

3.3 Removing the turntable motor
1. Take the metal plate out of the appliance.
2. VERY CAREFULLY prise out the turntable shaft with a flat
screwdriver.
3. Place the appliance on its back.
4. Remove the cover from the turntable motor.
This cover has been punched into the base plate. It can easily be
removed with side cutters.
5. Disconnect the turntable motor.
6. Remove the screws which attach the turntable motor to the cooking
compartment.
7. After repairing or replacing the motor, screw the cover to the base
plate with a screw.
Page 11 of 22 pages

3.4 Removing the cooling fan
1. Remove the housing.
2. Unscrew and remove the cooling fan assembly.
and remove in the direction of the
structure.
3. Unscrew the fan retaining plate
Page 12 of 22 pages

3.5 Removing the upper heating elements
1. Remove the housing.
2. Discharge the HV capacitor.
3. Unscrew the H.V. transformer.
4. Disconnect the heating elements.
5. Remove the nuts on the upper of cavity.
elements from the cavity.6. Lift out the upper heating
Page 13 of 22 pages

3.6 Removing the hot air motor
1. Remove the housing.
2. Discharge the HV capacitor.
3. Remove the rear cover.
4. Disconnect the Hot air assembly.
5. Remove oven sensor.
6. Unscrew the Hot air assembly and lift out carefully.
7. Disconnect the Hot air motor.
8. Remove the hex nut which attaches the inner fan blade to the shaft
of the hot air motor.
9. Pull out the inner fan blade in the hot air chamber.
10. Unscrew the hot air motor bracket.
11. Lift out the hot air motor with the bracket, and remove the outer fan
blade.
12. Unscrew the hot air fan motor from the hot air motor bracket.
Page 14 of 22 pages

Removing the magnetron3.7
1. Remove the housing.
2. Discharge the HV capacitor.
4. Disconnect the magnetron.
5. Unscrew the Control Panel Assembly.
6. Unscrew the magnetron.
NOTE:
When re-installing the magnetron, ensure that the fastening screws
are tightened to prevent microwave energy from escaping. Also
ensure that there is no gap between the hollow conductor and
magnetron.
Page 15 of 22 pages