Sharp Carousel R-350J 서비스 매뉴얼 - 페이지 14
{카테고리_이름} Sharp Carousel R-350J에 대한 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Sharp Carousel R-350J 36 페이지. Microwave oven
페이지 인쇄R-350J
PROCEDURE
LETTER
L
KEY UNIT TEST
If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable is making
good contact, verify that the 2nd. interlock relay control switch operates properly; that is the contacts are closed
when the door is closed and open when the door is open.
If the door 2nd. interlock relay control switch is good, disconnect the flat ribbon cable that connects the key unit
to the control unit and make sure the 2nd. interlock relay control switch is closed (either close the door or short
the 2nd. interlock relay control switch connector). Use the key unit matrix indicated on the control panel schematic
and place a jumper wire between the pins that correspond to the STOP/CLEAR pad making momentary contact.
If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the control unit
does not respond, it is faulty and must be replaced.
If a specific pad does not respond, the above method may be used (after clearing the control unit) to determine
if the control unit or key pad is at fault.
CARRY OUT 3D CHECKS.
M
RELAY TEST
Remove the outer case and check voltage between Pin No 1 of the 2-pin connector (A) and the normal open
terminal of the relay RY1 on the power unit with an A.C. voltmeter. The meter should indicate 230 - 240 volts,
if not check oven circuit.
RY1 and RY2 Relay Test
These relays are operated by D.C. voltage.
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated .................... Defective relay.
DC. voltage not indicated .............. Check diode which is connected to the relay coil. If diode is good, control
RELAY SYMBOL
CARRY OUT 4R CHECKS.
N
PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD
(PWB) IS OPEN
To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB,
this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting guide given below for repair.
Problem: POWER ON, indicator does not light up.
CARRY OUT 3D CHECKS.
STEPS
1
2
3
4
TEST PROCEDURES
G 1
G 2
VEGETALIAN
REHEAT
MENU
MEALS
VEGETABLES
EXPRESS
CONVENIENCE
MEAL
MEALS
unit is defective.
OPERATIONAL VOLTAGE
RY1
APPROX. 24.0V D.C.
RY2
APPROX. 23.0V D.C.
OCCURRENCE
The rated AC voltage is not present between
Pin No. 1 of the 2-pin connector (A) and the
normal open terminal of the relay RY1.
The rated AC voltage is present to primary
side of low voltage transformer.
Only pattern at "a" is broken.
Pattern at "a" and "b" are broken.
COMPONENT TEST
G 3
G 4
G 5
G 6
1
2
3
HELP
6
7
8
LOW FAT
INSTANT COOK
RICE/PASTA
MORE
MEALS
START
POWER
LESS
LEVEL
CONNECTED COMPONENTS
Oven lamp / Turntable motor / Cooling fan motor
Power transformer
CAUSE OR CORRECTION
Check supply voltage and oven power cord.
Low voltage transformer or secondary circuit defective.
Check and replace control unit assembly.
*Insert jumper wire J1 and solder.
*Insert the coil RCILF2003YAZZ between "c" and "d".
12
G 7
G 8
4
5
G 9
9
0
G10
TIMER
EXPRESS
G11
CLOCK
COOK
EASY
STOP
G12
DEFROST
CLEAR
EXPRESS
G13
DEFROST
G14