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R-370EZ

WARNING TO SERVICE PERSONNEL

Microwave ovens contain circuitry capable of pro-
ducing very high voltage and current, contact with
following parts   may result in a severe, possibly
fatal, electrical shock.

(Example)

High Voltage Capacitor, High Voltage Power Trans-
former, Magnetron, High Voltage Rectifier Assem-
bly,  High Voltage Harness etc..

Read the Service Manual carefully and follow all
instructions.

Before Servicing

1. Disconnect the power supply cord

,  and then

remove outer case.

2. Open the door and block it open.
3. Discharge high voltage capacitor.

WARNING:RISK OF ELECTRIC SHOCK.

DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORE SERVICING.

The high-voltage capacitor remains charged about 60
seconds after the oven has been switched off. Wait for 60
seconds and then short-circuit the connection of the high-
voltage capacitor (that is the connecting lead of the high-
voltage rectifier) against the chassis with the use of an
insulated screwdriver.

Whenever troubleshooting is performed the power supply
must be disconnected. It may, in some cases, be necessary
to connect the power supply after the outer case has been
removed, in this event,
1. Disconnect the power supply cord, and then remove

outer case.

2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power

transformer.

5. Ensure that the leads remain isolated from other

components and oven chassis by using insulation tape.

6. After that procedure, reconnect the power supply cord.

When the testing is completed,
1. Disconnect the power supply cord, and then remove

outer case.

2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Reconnect the leads to the primary of the power

transformer.

5. Reinstall the outer case (cabinet).
6. Reconnect the power supply cord after the outer case is

installed.

7. Run the oven and check all functions.

After repairing

1. Reconnect all leads removed from components during

testing.

2. Reinstall the outer case (cabinet).
3. Reconnect the power supply cord after the outer case is

installed.

4. Run the oven and check all functions.

Microwave ovens should not be run empty. To test for the
presence of microwave energy within a cavity, place a cup
of cold water on the oven turntable, close the door and set
the power to HIGH and set the microwave timer for two (2)
minutes. When the two minutes has elapsed (timer at zero)
carefully check that the water is now hot. If the water
remains cold, carry out Before Servicing procedure and re-
examine the connections to the component being tested.

When all service work is completed and the oven is fully
assembled, the microwave power output should be checked
and a microwave leakage test should be  carried out.

Don't Touch !
Danger High Voltage

Summary of Contents for R-370EZ

Page 1: ...ent contact with following parts may result in a severe possibly fatal electrical shock High Voltage Capacitor High Voltage Power Transformer Magnetron High Voltage Rectifier Assembly High Voltage Harness etc SHARP CORPORATION This document has been published to be used for after sales service only The contents are subject to change without notice SUPPLEMENTAL SERVICE MANUAL This is a supplemental...

Page 2: ...ransmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner e A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to release to the owner BEFORE SERVICING Before servicing an operative unit perform a microwave emission check as per the Microwave Mea...

Page 3: ...citor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that the leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure reconnect the power supply cord When the testing is completed 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Reconnect...

Page 4: ...initially at 20 5 C 68 F in the center of the oven cavity The water container shall be a low form of 600 ml 20 oz beaker with an inside diameter of approx 8 5 cm 3 1 2 in and made of an electrically nonconductive material such as glass or plastic The placing of this standard load in the oven is important not only to protect the oven but also to insure that any leakage is measured accurately 4 Set ...

Page 5: ...il the following points are ensured A The door is tightly closed B The door brackets and hinges are not defective C The door packing is not damaged D The door is not deformed or warped E There is no other visible damage with the oven Servicing and repair work must be carried out only by trained service personnel DANGER Certain initial parts are intentionally not grounded and present a risk of elec...

Page 6: ... 20 of Full Power P 10 approx 10 of Full Power P 0 No power throughout the cooking time SENSOR COOKING pads INSTANT ACTION pads COMPU DEFROST pads Number selection pads CUSTOM HELP PAD POWER LEVEL pad KITCHEN TIMER CLOCK pad STOP CLEAR pad MINUTE PLUS START pad Oven Cavity Light Yes Safety Standard UL Listed FCC Authorized DHHS Rules CFR Title 21 Chapter 1 Subchapter J SPECIFICATION Figure O 1 Ove...

Page 7: ...000 uF 35V 1 AF C3 VCEAB31VW106M Capacitor 10 uF 35V 1 AA C21 VCEAB31VW106M Capacitor 10 uF 35V 1 AA C50 51 RC KZA087DRE0 Capacitor 0 1 uF 50V 2 AA D1 4 RH DZA006PRE0 Diode 1N4002 4 AD D20 22 VHD1SS270A 1 Diode 1SS270A 3 AA D40 VHD1SS270A 1 Diode 1SS270A 1 AA IC2 VHIBA4558 6 IC BA4558 1 AK Q1 VS2SB1238 3 Transistor 2SB1238 1 AA Q21 VSDTD143ES 3 Transistor DTD143ES 1 AC Q22 VSDTA143ES 1B Transistor...

Page 8: ...A372WRWZ PWB cover 1 AF 5 11 PCUSUA567WRPZ Cushion 1 AE 5 12 XEBSD38P08000 Screw 3 8mm x 8mm 4 AA 5 13 XEPSD30P08XS0 Screw 3mm x 8mm 3 AA 5 14 LHLD A237WRFZ Light guide 1 AL 5 15 PCUSUA461WRP0 Cushion 1 AB MISCELLANEOUS 6 1 FROLPA079WRK0 Turntable support 1 AP 6 2 NTNT A079WRF0 Turntable tray 1 AR 6 2 NTNT A084WRE0 Turntable tray Interchangeable 1 AQ 6 3 FW VZB827WREZ Main wire harness 1 AW 6 4 QW...

Page 9: ...MER NOTE The neutral WHT wire must be connected to the terminal with N mark on the power supply cord GRY BLK ORG from Aug 2001 Prod GRY RED RED BLK RED BLK BLK BLK MONITOR FUSE HOLDER GRY WHT RED WHT WHT WHT RY2 RY1 SECONDARY INTERLOCK RELAY T1 POWER UNIT H N NOTE The grounding conductor of the power supply cord has been grounded by power supply cord fixing screw The screw must always be kept tigh...

Page 10: ... 16 7 5 4 20 4 12 4 13 x2 1 4 4 22 7 1 7 9 7 11 7 11 7 13 7 15 7 10 1 9 4 4 4 11 7 3 7 2 1 8 1 8 4 1 1 1 4 25 4 6 4 24 4 28 4 28 4 17 4 18 6 6 7 14 7 14 7 12 7 3 7 8 4 19 4 21 4 29 7 7 1 5 1 4 1 3 4 5 4 30 1 2 1 3 3 1 4 14 4 8 1 11 4 15 7 5 2 5 4 4 7 1 2 1 7 3 2 2 4 9 6 1 6 2 7 13 4 3 7 1 x2 7 1 x2 4 23 1 13 4 26 6 5 4 27 2 4 7 11 OVEN AND CABINET PARTS ...

Page 11: ...C D E F G H A B C D E F G H Actual wire harness may be different from illustration CAPACITOR 5 13 5 11 5 12 5 12 5 12 5 10 5 9 5 6 5 13 4 7 5 7 5 1 5 14 5 6 6 3 6 4 5 2 5 8 5 4 5 15 5 12 5 3 2 5 3 1 5 3 6 8 6 9 5 5 MISCELLANEOUS DOOR PARTS ...

Page 12: ...ocopying recording orotherwise withoutprior written permission of the publisher PACKING AND ACCESSORIES DOOR PROTECTION SHEET SPADPA204WRE0 TOP PAD ASSEMBLY FPADBA451WRKZ WRAP COVER SSAKHA072WREZ Not replaceable items PACKING CASE FPAK A412WRKZ BOTTOM PAD ASSEMBLY FPADBA453WRKZ 6 2 TURNTABLE TRAY 6 7 INSTRUCTION BOOK PRINTING MATTER 6 1 TURNTABLE SUPPORT TRAY PAD SPADFA499WREZ INTO THE OVEN CAVITY...

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