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- 8 -

Measure the resistance between terminals of
F P C   c o n n e c t o r   a f t e r   r e m o v i n g   i t   f r o m
S101.(Figure 10)

NOTE

- When reconnecting the FPC connector, make
sure the holes on the connector are properly
inserted in hook of the plastic fastener in S101.
MATRIX CIRCUIT FOR
TOUCH KEY BOARD
FPC CONNECTOR

COMPONENT

TOUCH KEY
BOARD

CHECKOUT PROCEDURE

RESULT

                  When        When not
Resistance touched     touched
  Value        Less than  More than
                  1 K ohms   1 meg ohms

When checking the POWER  key ,
connect the ohm-meter as illustrated
 below.

SWITCHES

(SEE Figure 1 on page 1)

CHECKOUT PROCEDURES

DOOR OPEN

DOOR CLOSED

  INTERLOCK SWITCH

DOOR SENSING SWITCH

INTERLOCK  MONITOR
SWITCH

Terminals "COM" and "NO"

Terminals "COM" and "NC"

CHECKOUT PROCEDURE FOR SWITCHES

Disconnect the lead wires from the switches and check for the continuity of the switches, connecting an ohm-meter
to its terminals.

CAUTION:  After checking the switches, make sure that the interlock monitor switch is properly connected according

to the CIRCUIT DIAGRAM on page 3.

TERMINAL OF FPC CONNECTOR
                                  FIGURE 10

Summary of Contents for EM-C180

Page 1: ...CE NO SM 640180 See the Service Manual of EM C180US SM 640179 except the items described in this Service Manual PRODUCT CODE NO 437 453 00 CAUTION WARNING TO SERVICE TECHNICIANS PRECAUTIONS TO BE OBSE...

Page 2: ...n the area emitting the highest reading switch the meter to SLOW RESPONSE and take a reading for minimum of three 3 seconds We recommended the pattern outline shown below when the door surface is surv...

Page 3: ...e door latch is securely locked 3 Tighten the lever stopper screws securely 4 Make sure the interlock monitor switch closes after the interlock switch opens when the door is opened very slowly accordi...

Page 4: ...ke dielectric or the door seal is dam aged d The door is bent or warped or there is any other visible damage to the oven that may cause microwave energy leakage Note Always keep the seal clean e Make...

Page 5: ......

Page 6: ...en each filament terminal of the magnetron and the chassis ground with an ohm meter on highest scale COMPONENT MAGNETRON HIGH VOLTAGE TRANSFORMER 1 Measure the resistance With an ohm meter on R x1 sca...

Page 7: ...Abnormal reading Indicates continuity or 10 meg ohms from the beginning Normal reading Indicate about middle position in one direction forward and infinite ohms in the reverse direction using ohm mete...

Page 8: ...K ohms 1 meg ohms When checking the POWER key connect the ohm meter as illustrated below SWITCHES SEE Figure 1 on page 1 CHECKOUT PROCEDURES DOOR OPEN DOOR CLOSED INTERLOCK SWITCH DOOR SENSING SWITCH...

Page 9: ...2 TP 3 and ground See figure 16 on page 23 Note Proceed with the check of the control P C B to see if any one of the measured values is differ ent from the specified values CHECKOUT PROCEDURE RESULT N...

Page 10: ...6 Power circuit board See page 7 Control circuit board See page 7 Cooking ope ration will not start Oven does not heat up Door sensing switch See page 7 Interlock switch See page 7 Control circuit boa...

Page 11: ...not touched within 1 minute after the door is opened or closed Oven stops heating Buzzer continuously beeps Blower motor will stop immediately Oven stops heating Buzzer does not beep Blower motor will...

Page 12: ...is warm in the following positions 1 Put your hand near the exhaust duct outside of the rear plate to feel the exhaust Never remove the cabinet and rear plate from the oven for your safety when you pu...

Page 13: ...ge 1 when the primary and secondary interlock switches the relay RL 3 and RL 4 or the interlock monitor switch is adjusted or replaced If the interlock switch the relay RL 3 and RL 4 or the interlock...

Page 14: ...it of 5mW c u For US After instaling the door check for microwave energy with a leakage detector and confirm that the leakage is the below the limit of 1 mW cm2 at 275cc waterload 5 mW cm2 at no load...

Page 15: ...uzzer on Press START key All 4 digits will be flashing Press START key again The number 215 shows total cooking time in hours When number key other than 1 or 2 is pressed at step 4 0 appears in displa...

Page 16: ...ion the following consumable components should be replaced Maintenance light in window display indicates when accumulative cooking time reaches 1 250 hours 1 Magnetron Tube Part No 415 002 6408 2 Prin...

Page 17: ...nt have special characteristics for safety and must be replaced using parts listed in this manual All service on M W ovens should be performed by a qualified technician using approved testing equipmen...

Page 18: ...istics for safety and must be replaced using parts listed in this manual All service on M W ovens should be performed by a qualified technician using approved testing equipment Customers should not at...

Page 19: ......

Page 20: ...characteristics for safety and must be replaced usnig parts listed in this manual All service on M W ovens should be performed by a qualified technician using approved testing equipment Customers shou...

Page 21: ...istics for safety and must be replaced using parts listed in this manual All service on M W ovens should be performed by a qualified technician using approved testing equipment Customers should not at...

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Page 28: ...C Inside Wiring of Switches Monitor switch Interlock switch Door sensing switch Orange C Brown White Yellow Purple Purple Blue NC Inside L i g h t Blue Orange White Pink NO Inside NO NC White FRONT F...

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