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- 12 -

1.  Make sure to leave the grounding plate in its place.

2.  Make sure to securely tighten grounding screw from the

bottom of chasis (base).

3.  Securely connect 3 lead wire connectors.

4.  Make sure the heat sink has enough space (gap) from the

     oven.  Take special care not to touch any lead wire to the

     aluminum heat sink because it is hot.

1. Take off outer panel.

2. Remove screw

4. Disconnect all wires from inverter.  Detach turntable wires

     from inverter bracket.

3. Remove screw

5. Remove screw and slide oriffice toward you, then lift up and out.

6. Slide four locking of oriffice at the bottom of the base slightly

7. Remove 2 screws holding inverter to inverter bracket.

8. Replace inverter and reassemble to inverter bracket A.

9. Retighten 2 screw

10. Slide and place assembly to  the correct location of a completed unit.

11. Push Inverter Assembly until locking tabs are locked.

12. Retighten inverter screws and orifice screws.

13. Reconnet all wires to correct location and redress turntable wires.

                               CAUTION
1. High voltage is present at the high voltage terminal of

the High Voltage Inverter (U) including aluminum heat
sink during any cook cycle.

2. It is neither necessary nor advisable to attempt mea-

surement of the high voltage.

3. Before touching any oven components, or wiring,

always unplug the oven from its power source and
discharge the high voltage capacitors.

 NEW. H.V.

(A) Unplug the lead connectors to Power Relay B and verify continuity

of the power relay B 1-2 terminals.

(B) Unplug lead connectors to Primary Latch Switch and Secondary

Latch Switch.

(C) Test the continuity of switches at door opened and closed positions

with ohm meter (low scale).
Normal continuity readings should be as follows.

(A) Unplug lead wires from Inverter Power Supply (U) primary terminals.
(B) Connect test probes of ohm meter to the disconnected leads which

were connected to Inverter Power Supply (U).

(C) Test the continuity of short switch with door opened and closed

positions using lowest scale of the ohm meter.
Normal continuity readings should be as follows.

  Door Closed
   0 

Ω

  (close)

   0 

Ω

  (close)

Primary Latch Switch
Secondary Latch Switch
Power Relay B

Door Closed

Ω

Door Opened

0 

Ω

- 13 -

Continuity checks can only indicate an open filament or a shorted
magnetron. To diagnose for an open filament or shorted
magnetron.

(A) Isolate magnetron from the circuit by disconnecting the leads.
(B) A continuity check across magnetron filament terminals should

indicate one ohm or less.

(C) A continuity check between each filament terminal and magnetron

case should read open.

ANTENNA

COOLING
FIN

MAGNETRON
CASE

HIGHEST
OHM
SCALE

FILAMENT
TERMINALS

04-031M

0

Ω

-1

Ω

RX1
SCALE

ANTENNA GASKET

HEAT SINK

CHOKE COIL

CURRENT

TRANSFORMER

RESISTOR

SAND BAR

PCB

FILM CAPACITORS

VARISTOR

PRIMARY WINDINGS

SECONDARY

WINDINGS

HIGH VOLTAGE

DIODES

DO NOT TOUCH 4

DANGER HIGH VOLTAGE

Test if failure codes of H97 or H98 appears by doing the following
procedure.  It is recommended to use an AC line input current
Ampere meter for testing.
Test 1
A.  Program DPC.

1. Tap Clock
2. Tap TIMER
3. Tap START
4. Tap POWER LEVEL

B.  Place 1 liter of water load into oven cavity.
C.  Unplug 2 pin H.V. lead wire connector CN703 from magnetron
tube.
D.  Program oven at High power for 1 minute and press start.

1. After approximately 15 seconds, oven displays H98 and
    stops oven.
2. During oven operation, input current is approximately 0.5

  to 1A.  If both 1 and 2 are OK, please proceed to test 2.

.
Test 2.

Continued from Test 1
A. Unplug 3 pin connector, CN701
B. Set oven at High power for 1 minute and start.

1. After approximately 27 seconds, oven displays H97 and

  stops oven.

2. During oven operation, input current is approximately less

  than 0.4A.

If both 1 and 2 are OK, the Inverter Power Supply (U) can be
determined OK.

FAILURE CODE

H98

FAILURE CODE

H97

Unplug CN703

INPUT AMPERE

0.5 to 1A

Unplug CN701

INPUT AMPERE

< 0.4A

HIGH BOLTAGE
TRANSFORMER

DO NOT TOUCH (HOT/HIGT VOLTAGE)

  Door Opened

  

Ω

  (open)

  

Ω

  (open)

  

Ω

  

(open)

Check continuity between switch terminals, by tapping an appropri-
ate pad on the key board.  The contacts assignment of the
respective pads on the key board is as shown in digital programmer
circuit.

Ω

  

(open)

(A) When mounting Primary latch switch,Secondary latch switch

and short switch to door hook assembly, mount the Primary latch
switch, the Secondary latch switch and the short switch to the
door hook assembly as shown in table.

(B) When mounting the door hook assembly to the oven

assembly, adjust the door hook assembly by moving it in the
direction of arrow in the illustration so that the oven door will not
have any play in it. Check for play in the door by pulling the door
assembly. Make sure that the latch keys move smoothly after
adjustment is completed. Completely tighten the screws holding
the door hook assembly to the oven assembly.

(C) Reconnect the short switch and check the continuity of the

monitor  circuit and all latch switches again by following the
components test procedures.

The output power of the magnetron can be determined by performing

IEC standard test procedures. However,due to the complexity
of IEC test procedures, it is recommended to test the magnetron
using the simple method outlined below.

Necessary Equipment:
*1 liter beaker    *Glass thermometer
*Wrist watch or stopwatch

(A) Fill the beaker with exactly one liter of tap water.Stir the water

using the thermometer and record the beaker’s temperature.
(recorded as T1).

(B) Place the beaker on the center of glass cook plate.

Set the oven for High power and heat it for exactly one minute.

(C) Stir the water again and read the temperature of the beaker.

(recorded as T2).

(D) The normal temperature rise at High power position for each

model is as shown in table.

* For  continued  protection  against  radiation  hazard,

replace only with identical replacement parts(For touch
m o d e l s   P a r t   N o .   A N E 6 1 4 2 - 1 4 5 0 , T y p e   N o .
V-16G-3C26-M  for  Primary  latch  switch;  Part  No.
A61425180AP, Type No. L-3C2-2 for Secondary latch
switch;  Part  No. A61785180AP, Type  No.  L-2C2-2  for
short switch and Part. No. AEG5J1EG12B/AEG5J1EG18B,
Type No. G5J-1-TP for power relay B(RY1))

* When the 10 Amp. fuse is blown due to the operation of

the short switch, you must replace power relay B. Primary
latch switch and the short switch. Then follow the installa-
tion procedures below.

* Interlock  switch  replacement    In  replacing  faulty

switches, be sure mounting tabs are not bent, broken or
otherwise deficient in their ability to hold the switches.

* Refer to schematic diagram to ensure proper connec-

tion.

SWITCH

GAP SHOULD BE <0.7MM.

ACTUATOR
LEVER

SCREW

PRIMARY
LATCH
SWITCH

DOOR HOOK
ASSY

SHORT
SWITCH

SECONDARY
LATCH
SWITCH

SCREW

DOOR

01-033

RATED OUTPUT

1000W(IEC705-88)

- 14 -

TEMPERATURE RISE

Min. 15.4

o

F(8.6

o

C)

Check for radiation leakage after every servicing. Should
the leakage be more than 2 mW/cm

2

. After repairing

or replacing any radiation safety device, keep a written
record  f o r  fu tu re reference,  the leakage reading
must be recorded on the service repair ticket while in
the customer’s home.

*Electromagnatic radiation monitor
*Glass thermometer 212 

O

F or 100 

O

C

*600cc glass beaker

Note before measuring.
(1) Do not exceed meter full scale deflection. Leakage monitor

should initially be set to the highest  scale.

(2) To prevent false readings the test probe should be held by the

grip portion of the handle only and moved along the shaded area
in Figure no faster than 1 inch/sec (2.5cm/sec).

(3) Leakage with the outer panel removed ...... less than 5mW/cm

2

 .

(4) Leakage for a fully assembled oven with door normally closed

...... less than 2mW/cm

2

 (1mW/cm 

2

for Canada).

      (5) Leakage for a fully assembled oven [Before the latch switch

(primary) is interrupted] while  pulling the door ...... less than
2mW/cm

2

 .

(A) Pour 275

15cc (9ozs

s

1/2oz) of 20

O

5 

O

C (68

O

9 

O

F) water in a

beaker which is graduated to  600cc, and place in the center of the
oven.

(B) Set the radiation monitor to 2450MHz and use it following the

manufacturer’s recommended test procedure to assure correct
results.

(C) When measuring the leakage, always use the 2 inch (5cm) spacer

supplied with the probe.

(D) Tap the start pad or set the timer and with the magnetron oscillating,

measure the leakage by holding the probe perpendicular to the
surface being measured.

Whenever you replace the magnetron, measure for radiation leakage
before the outer panel is installed and after all necessary components
are replaced or adjusted. Special care should be taken in measur
ing around the magnetron.

After all components, including outer panel are fully assembled,
measure for radiation leakage around the door periphery, the
door viewing window, the exhaust opening and air inlet openings.

After any adjustment or repair to a microwave oven, a leakage read-
ing must be taken. Record this leakage reading on the repair ticket
even if it is zero.
A copy of this repair ticket and the microwave leakage reading should
be kept by repair facility.

Avoid contacting any high voltage parts.

- 15 -

MOVE PROBE ALONG SHADED

AREA(           )AROUND EXHAUST

OPENINGS(as shown)AND AROUND

AIR INLET OPENING

01-035

AVOID CONTACTING ANY HIGH VOLTAGE PARTS.