Sharp R-cd1800m Service Manual

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8) For the door key unit, check the open/short and/or connection of the switch unit and the harness, too.
10.If the Key unit is defective.
1) Disconnect the power supply cord, and then remove outer case and rear cover.
2) Open the door and block it open.
3) Discharge two high voltage capacitors.
4) Replace the Key unit.
5) Reconnect all leads removed from components during testing.
6) Re-install the rear cover and the outer case (cabinet).
7) Reconnect the power supply cord after the rear...

RCD2200M
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vi) If they are open, the power unit is defective
[17] Q: RELAY UNIT TEST
1. Disconnect the power supply cord, and then remove outer case and rear cover.
2. Open the door and block it open.
3. Discharge two high voltage capacitors.
4. Remove the relay unit from the oven, referring to “RELAY UNIT REMOVAL”.
5. Check the continuity of the FUSE1 on the relay unit.
1) If it is open, the relay unit is defective.
6. Check the open and /or short of the transformer primary coil on the relay unit....

RCD2200M
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For example: Procedure to check the total cooking number of times (example, 957700 times) and using time (example, 1260 hours) of MG 1
and set 0 hours after MG1 is replaced.
: no sound     {: 0.1 second sound       : 2.0 second sound     : (0.06 sec. ON, 0.06 sec. OFF) x 2 beeps 
 ✩: [(0.04 sec. ON, 0.04 sec. OFF) x 3] x 4 beeps    †: (0.1 sec. ON, 0.1 sec. OFF) x 10 beeps
For example: Procedure to check the total cooking number of times (example, 957700 times) and clear it and check using...

RCD2200M
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#1 If there is no error “0 will be displayed. 
#2 If you touch SELECT POWER, all history are cleared. 
3. Check of AC supply voltage (SF-5)
You can check the current voltage of AC supply.
For example: Procedure to check current voltage (In case of
230V)
For example: Procedure to check current voltage (In case of
208V)For example: Procedure to check current voltage (In case of 230V
+13%)
For example: Procedure to check current voltage (In case of 208V
-13%)
4. Exhaust thermistor check...

RCD2200M
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For example: In case the exhaust thermistor works incorrectly (275ml water load is necessary), the display will show “no” as follows. In
that case, the exhaust thermistor should be checked or replaced.
5. Set of standard voltage (SF-7)
When the control unit or the relay unit is replaced, set the standard voltage, referring to following procedure. Because the control unit judges if the AC
supply voltage is 230V or 208V by comparing with the standard voltage. The temporary standard voltage...

RCD2200M
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For example: Procedure to set standard voltage at 230V area. This example shows how to set the standard voltage when the oven judge
that the input voltage is 208V by mistake at 230V area.
If the input voltage is not accurate at the place of customer, the standard voltage can be selected by using “0” key in the following procedure.
For example: Procedure to set standard voltage at 208V area. This example shows how to set the standard voltage when the oven judge
that the input voltage is...

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[2] SERVICING FOR BRINTED WIRING BOARDS
1. Precautions for Handling Electronic Components
This unit uses CMOS LSI in the integral part of the circuits. When han-
dling these parts, the following precautions should be strictly followed.
CMOS LSI have extremely high impedance at its input and output ter-
minals. For this reason, it is easily influenced by the surrounding high
voltage power source, static electricity charge in clothes, etc. and
sometimes it is not fully protected by the...

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RCD2200M
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