GOLDSTAR MV1525xx Service Manual

MICROWAVE OVEN
SERVICE MANUAL
MODEL: MV-1525W,
CAUTION
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BEFORE SERVICING THE UNIT, READ THE
SAFETY PRECAUTIONS IN THIS MANUAL.
CAUTION
SAFETY PRECAUTIONS
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE EXPOSURE
TO EXCESSIVE MICROWAVE ENERGY
a. Do not operate or allow the oven to be operated with the door open. b. Make the following safety checks on all ovens to be serviced before activating the
magnetron or other microwave source, and make repairs as necessary; (1) Interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse.
c. Before turning on microwave power for any service test or inspection within the
microwave generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.
d. Any defective or misadjusted components in the interlock, monitor, door seal, and
microwave generation and transmission 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.
Proper operation of the microwave ovens requires that the magnetron be assembled to the
wave guide and cavity. Never operate the magnetron unless it is properly installed.
Be sure that the magnetron gasket is properly installed around the dome of the tube whenever
installing the magnetron.
Routine service safety procedures should be exercised at all times.
Untrained personnel should not attempt service without a thorough review of the test
procedures and safety information contained in this manual.
FOREWORD
Read this Manual carefully. Failure to adhere to or observe the information in this Manual may result in exposing yourself to the Microwave Energy normally contained within the oven cavity.
TABLE OF CONTENTS
(Page)
SAFETY PRECAUTIONS ......................................................................................................... Inside front page
SPECIFICATIONS.......................................................................................................................................... 1-1
CAUTIONS..................................................................................................................................................... 2-1
INSTALLATIONS............................................................................................................................................ 3-1
OPERATING INSTRUCTIONS....................................................................................................................... 4-1
CONTROL PANEL ................................................................................................................................. 4-1
CONTROL PANEL INSTRUCTIONS ..................................................................................................... 4-2
OVERALL CIRCUIT DIAGRAM...................................................................................................................... 5-1
SCHEMATIC DIAGRAM......................................................................................................................... 5-1
MATRIX CIRCUIT FOR TOUCH KEY BOARD...................................................................................... 5-2
GENERAL INFORMATION FOR SERVICE................................................................................................... 6-1
GENERAL PRECAUTIONS IN USE ...................................................................................................... 6-1
TRIAL OPERATION ............................................................................................................................... 6-1
FEATURES AND SPECIFICATIONS FEATURES................................................................................. 6-1
SERVICE INFORMATION ............................................................................................................................. 7-1
PRECAUTIONS AND REPAIR SERVICE TIPS..................................................................................... 7-1
MICROWAVE LEAKAGE TEST............................................................................................................. 7-2
POWER OUTPUT MEASUREMENT ..................................................................................................... 7-3
DISASSEMBLY INSTRUCTIONS .......................................................................................................... 7-4
INTERLOCK SYSTEM .......................................................................................................................... 7-12
INTERLOCK CONTINUITY TEST.......................................................................................................... 7-14
TEST AND CHECKOUT PROCEDURES AND TROUBLE SHOOTING................................................ 7-15
A. TEST PROCEDURES................................................................................................................ 7-15
B. CHECKOUT PROCEDURES..................................................................................................... 7-18
C. TROUBLE SHOOTING.............................................................................................................. 7-21
EXPLODED VIEW.......................................................................................................................................... 8-1
REPLACEMENT PARTS LIST............................................................................................................... 8-8
SCHEMATIC DIAGRAM OF PCB .......................................................................................................... 8-15
PRINTED CIRCUIT BOARD .................................................................................................................. 8-16
PCB PARTS LIST................................................................................................................................... 8-17
1-1
Rated Power Consumption 1,500W maximum (Microwave oven only)
1,600W maximum (Microwave oven+Cook top lamps+Ventilation fan)
Microwave Output
1000W (IEC 705 TEST PROCEDURE) Adjustable 100W through 1000W, 10 steps
Frequency 2,450 MHz
+
_
50 MHz Power Supply 120 VAC, 60 Hz Rated Current 13 Amp. (Microwave oven only)
14 Amp. (Microwave oven+Cook top lamps+Ventilation fan) Magnetron Cooling Forced Air Cooling Rectification Rectification Voltage Double Half-Wave Door Sealing Choke System Safety Devices Magnetron Thermal Fuse:
Open at 109
°
C
+
_
4°C
Oven Cavity Thermostat:
Open at 110
°
C
+
_
50°C Fuse(20A) Primary Interlock Switch Secondary Interlock Switch Interlock Monitor
Magnetron 2M246-310GF or 2M248E High Voltage Capacitor Capacitor: 1.0µF, 2.1 KV AC High Voltage Diode Diode; 350mA, 9.0 KV Cook top Lamp 125 V, 30 W or 40 W Cavity Lamp 125 V, 30 W or 40 W Timer Digital, up to 99 mim. 99 sec. (in each cooking stage) Tray Tempered Safety Glass
Overall Dimensions 29
15
/16”(W)x167/16”(D)x153/8”(H)
Oven Cavity Size 19
7
/8”(W)x145/32”(D)x815/16”(H)
Effective Capacity of Oven Cavity 1.5 Cu.ft. Accessories Owner’s Manual & Cooking Guide, Installation Manual,
Exhaust Adapter, Exhaust Damper, Mounting Kit and Two Filters, Rotating Ring Assembly, Metal Rack.
SPECIFICATIONS
2-1
CAUTIONS
• DO NOT operate on a 2-wire extension cord during repair and use.
• NEVER TOUCH any oven components or wiring during operation.
• BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet.
• For about 30 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must discharge the high voltage capacitor by shorting across the two terminals with an insulated screwdriver.
Remove your watches whenever working close to or
replacing the Magnetron.
• DO NOT touch any parts of the control panel circuit. A resulting static electric discharge may damage this P.C.B.
• NEVER operate the oven with no load.
• NEVER injure the door seal and front plate of the oven cavity.
• NEVER put iron tools on the magnetron.
• NEVER put anything into the latch hole and the interlock switches area.
• Proper operation of the microwave oven requires that the magnetron be assembled to the waveguide and cavity. Never operate the magnetron unless it is properly installed.
• Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the magnetron.
Unlike other appliances, the microwave oven is high-voltage and high-current equipment. Though it is free from danger in ordinary use, extreme care should be taken during repair.
THE OVEN IS TO BE SERVICED ONLY BY PROPERLY QUALIFIED SERVICE PERSONNEL.
MICROWAVE RADIATION
Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating device if it is improperly used or connection. All input and output microwave connections, waveguide, flange, and gasket must be secure never operate the device without a microwave energy absorbing load attached. Never look into an open waveguide or antenna while the device is energized.
Gasket
ANTENNA
COOLING FIN
MAGNETRON CHASSIS GROUND
FILAMENT TERMINALS
MAGNETRON
3-1
INSTALLATIONS
PRECAUTIONS ON INSTALLATION
A. Plug the power supply cord into a 120V AC, 60Hz,
single-phase power source with a capacity of 15A or 20A.
B. Avoid placing the unit in a location where there is
direct heat or splashing water. C. Install the unit on the mounting plate firmly. D. Place the unit as far away as possible from TV,
radio, etc. to prevent interference.
GROUNDING INSTRUCTIONS
For personal safety, this appliance must be fully grounded at all times.
In the event of an electrical short circuit, grounding reduces the risk of electrical shock. The plug must be plugged into an outlet that is properly installed and grounded.
BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.
WARNING
Improper use of the grounding plug can result in a risk of electric shock. Do not, under any circumstances, cut or remove the third ground prong from the power cord plug.
CAUTION
This unit is equipped with a 3-prong plug for your safety. If the wall outlet is a grounded 3-hole type, the unit will be grounded automatically.
Plug with Ground
Prong
Properly Polarized and Grounded Outlet
CONTROL PANEL
4-1
OPERA TING INSTRUCTIONS
CUSTOM
COOK
TURNTABLE
ON/OFF
FAN
HI/LO/OFF
LIGHT
HI/LO/OFF
KITCHEN
TIMER
CUSTOM
SET
CLOCK
AM/PM
LIGHT TIMER
AM/PM
POTATO
PIZZA
RICE
DINNER
PLATE
SOUP
SAUCE
FROZEN ENTREE
BACON
FRESH
VEGETABLE
FROZEN
VEGETABLE
POPCORN
BEVERAGE
CASSEROLE
POWER
HELP
HOLD
WARM
AUTO TOUCH
1
23
4
56
7
8 0
9
Ez OnEz On
DEFROST
MOREMORE
LESSLESS
STOP
CLEAR
START
CONTROL PANEL INSTRUCTIONS
4-2
The entire operation is done by simple touch control pads. (1) Display Window
Numbers and letters are shown in the display
window (Vacuum Fluorescent Tube). Each Indicator Light shows which function is set and involved in the course of cooking by turning itself on. Indicator Lights automatically go out upon completion of cooking.
(2) MORE, LESS Key
Used to add or subtract ten seconds of cooking
time each time pressing it.
(3) POWER Key
Used to select cooking power level.
(4) EZ on Key
Used to cook for one minute at 100% power level.
It can be used to extend cooking time in multiples
of one minute up to 99 minutes.
(5) CLOCK(TIME OF DAY) Key
Used in setting Time of Day.
(6) STOP/CLEAR Key
Used to stop the oven or clear all entries except
Time of Day.
(7) START Key
Touch the START key after setting the desired
cooking times etc. Also touch the START key to
resume cooking after the cooking is temporarily
stopped by opening the door. The key will not
function unless the door is closed.
(8) DEFROST Key
Used to defrost for frozen foods by weight.
(9) AUTO TOUCH
Used to cook the preprogrammed food
automatically.
(10) HELP Key
This HELP key display feature information and helpful hints.
(11) LIGHT TIMER
Used to set the cooktop light to turn on and off automatically at any time you want. The light comes on at the same time every day until reset.
(12) KITCHEN TIMER
Used to set the timer.
(13) TURNTABLE ON/OFF
Touch this pad to turn off the turntable. “T/TABLE OFF” will appear in the display.
(14) CUSTOM SET Key
Touch this pad to change the oven’s default setting for sound, clock, display speed, defrost weight, and demo mode operations.
(15) FAN HI/LO/OFF Key
Touch FAN once for HIGH fan speed, twice for low fan speed, or threetimes to turn the fan off.
(16) LIGHT HI/LO/OFF Key
Touch LIGHT once for bright light, twice for the night light, or three times to turn the light off.
5-1
1
RY 1
RY 3
RY 4
RY 5
PH 1
VR 2
PK
(NO)
PRIMARY SWITCH (BOTTOM)
(C)
BL
CN 1
RY6 RY2
123
CN 2
RD
1
1
1
2
2
1
2
2
3
3
1
23
456
123456
RD
RD
RD
6 uF CAPACITOR
RD
S.M F.M
FAN MOTOR
TURNTABLE MOTOR
SECONDARY
SWITCH
(TOP)
RD
RD
RD
RDBRBR
BR
(NC)
H.V.TRANSFORMER
H.V.CAPACITOR
MAGNETRON
FA
F
RECTIFIER
CONTROL MODULE
(C) MONITOR SWITCH (MIDDLE)
BK
BK
WH
RESISTOR
BK
BK
BK
GY
15 PIN CONNECTOR(CN 1)
* NOTE
1. DOOR OPENED & COOK OFF MODE.
2. BLUE MARK ON LAMP SOCKET MUST BE CONNECTED TO LIVE PART(BLACK WIRE).
3. ONLY CERTAIN MODELS USE THE ABSOLUTE HUMIDITY SENSOR.
BK
BK
BK
OVEN LAMP
COOK TOP LAMPS
O.L
BK
SINGLE PHASE ONLY
AC 120V 60Hz
BL
BL
BL
C
Hi
Low
BL
GN
LN
BL
PK
PK
YL
GY
YL
YL
WH
WH
WH WH
WH
WH
WH
C.L C.L
WH
WH
WH
STIRRER MOTOR
YL
(C)
(NO)
WH
WH
WH
SYMBOL COLOR
WHITE BLACK RED YELLOW PINK BLUE BROWN GREEN
BK RD YL PK BL BR GN
GREY
GY
WIRE COLORS
13579111315
WH
WH
WH
RD
BK
BK
BK
VENT MOTOR
V.M
FUSE 20A
MGT THERMAL FUSE (109 C/228 F)
MICRO COMPUTER BOARD
POWER TRANS
3
5
7
9
11
13
15
OVEN THERMOSTAT (110 C/230 F)
BASE
THERMOSTAT
(56 C/133 F)
3 PIN (CN 2)
(For not provided
Temp Probe)
BL
PK
13
T.M
SCHEMATIC DIAGRAM
OVERALL CIRCUIT DIAGRAM
MATRIX CIRCUIT FOR TOUCH KEY BOARD
7654321
FROZEN
VEGETABLE
POPCORN
FAN(VENT)
HI/LO/OFF
HELP N.C 5 0
POTATO
FROZEN ENTREE
LIGHT
HI/LO/OFF
CUSTOM
SET
DEFROST
61
BEVERAGE
DINNER
PLATE
EZ on CLOCK 7 2
RICE
HOLD
WARM
POWER
KITCHEN
TIMER
FRESH
VEGETABLE
LIGHT
TIMER
N.C 8 3
PIZZA
CASSEROLE
START
STOP/
CLEAR
94
SOUP/
SAUCE
BACON CUSTOM
COOK
LESS MORE N.C
TURNTABLE
ON/OFF
8
9
10
11
12
13
5-2
6-1
GENERAL PRECAUTIONS IN USE
A. Never operate the unit when it is empty.
Operating the oven with no load may shorten the life of the magnetron. Whenever cooking dry foods (dried fish, bread, etc.) or a small amount of food, be sure to put a glass of water into the cooking compartment. The glass turntable may become hot after operating, be careful when touching it.
B. Aluminum foil should be avoided because it will
disrupt cooking and may cause arcing. However, small pieces may be used to cover some parts of food to slow the cooking. Any aluminum foil used should never be closer than 2.5 cm to any side wall of the oven.
TRIAL OPERATION
After installation, the following sequences and results should be checked carefully.
A. Put a container filled with water (about 1 liter) into
the oven, and close the door tightly.
B. Set cooking time for 10 minutes by touching “1”
and then “0” three times. “1, 0, 0, 0” appears in the display window.
C. Touch the START key.
Make sure the cavity light comes on. The unit will begin cooking and the display window will show the time counting down by seconds.
D. After about 5 minutes, make sure the primary
interlock switch, the secondary interlock switch and the interlock monitor switch operate properly by opening and closing the door several times. Touch the START key each time the door is closed.
E. Continue operating the unit. Two short and a long
beep sound signal is heard when the time is up.
The unit will shut off automatically. F. Confirm the water is hot. G. Finally, measure the output power according to
“POWER OUTPUT MEASUREMENT” on
page 7-3.
FEATURES AND SPECIFICATIONS FEATURES
A. The safety systems incorporated in this model are:
(1) Primary interlock switch (2) Secondary interlock switch (3) Interlock monitor switch (4) Choke system (5) Magnetron thermal fuse (6) Oven cavity thermostat
(Note: This thermostat located on the oven cavity will open and stop the unit from operation only if a high temperature is reached, such as, a fire created by overcooking food.)
B. Any one of 10 power output levels ranging 100W to
1000W can be selected by the touch control and electronic computer system.
GENERAL INFORMATION FOR SERVICE
PRELIMINARY
A. SINCE NEARLY 2,100 VOLTS EXISTS IN SOME
CIRCUITS OF THIS UNIT REPAIRS SHOULD BE CARRIED OUT WITH GREAT CARE.
The filament leads of magnetron carry High Voltage with respect to ground. Extreme caution must be exercised. Never plug the unit into a power source to determine which component is defective in high voltage section.
B. TO AVOID POSSIBLE EXPOSURE TO
MICROWAVE ENERGY LEAKAGE, THE FOLLOWING PRECAUTIONS MUST BE TAKEN BEFORE SERVICING.
(1) Before the power is applied:
(a) Make sure the primary interlock switch, the
secondary interlock switch and the interlock monitor switch operate properly by opening and closing the door several by opening and closing the door several times.
(b) Make sure the perforated screen and the
dielectric choke of the door are correctly and firmly mounted.
(2) After power is applied:
(a) Make sure the interlock switch mechanism
is operating properly by opening and closing the door.
(b) Check microwave energy leakage must bebelow
the limit of 5 mW/cm
2
.
(All service adjustments should be made for minimum microwave energy leakage readings).
(3) Do not operate the unit until it is completely
repaired, if any of the following conditions exist.
The unit must not be operated. (a) The door does not close firmly. (b) The hinge is broken. (c) The door seal is damaged. (d) The door is bent or warped, or there is any
other visible damage on the unit that may
cause microwave energy leakage. NOTE: Always keep the seal clean. (e) Make sure that there are no defective parts
in the interlock mechanism. (f) Make sure that there are no detective parts
in the microwave generating and transmission
assembly (especially waveguide).
(4) The following items should be checked after the
unit is repaired:
(a) The interlock monitor switch is connected
correctly and firmly. (b) The magnetron gasket is properly positioned
and mounted. (c) The waveguide and the oven cavity are intact.
(no microwave energy leakage) (d) The door can be properly closed and the
safety switches work properly. (e) The unit must stop when the door is opened or
the time is up.
The unit must not be operated with any of the above components removed or by-passed.
7-1
PRECAUTIONS AND REPAIR SERVICE TIPS
SERVICE INFORMATION
7-2
CAUTIONS
Be sure to check microwave leakage prior to servicing the oven if the oven is operative prior to servicing.
The service personnel should inform the manufacture importer, or assembler of any certified oven unit found to have a microwave emission level in excess of 5 mW/cm2and should repair any unit
found to have excessive emission levels at no cost to the owner and should ascertain the cause of the excessive leakage. The service personnel should instruct the owner not to use the unit until the oven has been brought into compliance.
If the oven operates with the door open, the service personnel should:
- Tell the user not to operate the oven.
- Contact the manufacturer and CDRH
(Center for Devices and Radiological Health)
immediately.
NOTE: Address on CDRH
Office of Compliance(HFZ-312) Center for Devices and Radiological Healthe 1390, Piccard Drive, Rockville. MD 20850
• The service personnel should check all surface and vent openings for microwave leakage.
• Check for microwave leakage after every servicing. The power density of the microwave radiation leakage emitted by the microwave oven should not exceed 4 mW/cm2. Always start measuring of an unknown field to assure safety for operating personnel from radiation leakage.
EQUIPMENT
• TESTER (VOLTS-DC, AC, Ohmmeter)
• Microwave survey meter
- Holaday HI-1500 HI-1501
- Narda 8100
8200
• 600 cc non conductive material beaker (glass or plastic), inside diameter: approx. 8.5 cm (3
1
/2
in.)
• Glass thermometer: 100°C or 212°F (1 deg scale)
MEASURING MICROWAVE ENERGY LEAKAGE
Pour 275±15cc of 20±5°C(68±9°F) water in a beaker which is graduated to 600 cc, and place the beaker on the center of the turntable.
Set the energy leakage monitor to 2,450 MHz and use it following the manufacturer's recommended test procedure to assure correct result.
When measuring the leakage, always use the 2-inch (5cm) spacer supplied with the probe.
Operate the oven at its maximum output.
Measure the microwave radiation using and
electromagnetic radiation monitor by holding the probe perpendicular to the surface being measured.
Move probe along shaded area.
Probe scanning speed Less than 2.5 cm/sec. ( 1 in/sec)
MICROWAVE LEAKAGE TEST
MEASUREMENT WITH THE OUTER CASE REMOVED
(1) When you replace the magnetron, measure for
microwave energy leakage before the outer case is installed and after all necessary components are replaced or adjusted. Special care should be taken in measuring the following parts.
- Around the magnetron
- The waveguide
WARNING: AVOID CONTACTING ANY HIGH
VOLTAGE PARTS.
MEASUREMENT WITH A FULLY ASSEMBLED OVEN
(1) After all components, including the outer
panels, are fully assembled, measure for microwave energy leakage around the door viewing window, the exhaust opening and air inlet openings.
(2) Microwave energy leakage must not exceed the
values prescribed below.
NOTES:
Leakage with the outer panels removed - less than 5 mW/cm
2
.
Leakage for a fully assembled oven (“Before the latch switch (primary) is interrupted”) with the door in a slightly opened position - less than 2 mW/cm
2
.
NOTE WHEN MEASURING
(1) Do not exceed meter full scale deflection. (2) The test probe must be removed no faster than
1 inch/sec (2.5cm/sec) along the shaded area, otherwise a false reading may result.
(3) The test probe must be held with the grip portion
of the handle. A false reading may result if the operator’s hand is between the handle and the probe.
(4) When testing near a corner of the door, keep
the probe perpendicular to the surface making sure the probe horizontally along the oven surface, this may possibly cause probe damage.
RECORD KEEPING AND NOTIFICATION AFTER MEASUREMENT
(1) After adjustment and repair of any microwave
energy interruption or microwave energy blocking device, record the measured values for future reference. Also enter the information on the service invoice.
(2) Should the microwave energy leakage not be
more than 2 mW/cm2after determining that all parts are in good condition, functioning properly and genuine replacement parts which are listed in this manual have been used.
(3) At least once a year, have the electromagnetic
energy leakage monitor checked for calibration by its manufacturer.
(1)
Microwave power output measurement is made with the microwave oven supplied at its rated voltage and operated at its maximum microwave power setting with a load of (1000±5) g of potable water.
(2)
The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of
1/8” (3 mm) and an outside diameter of approximately 7.6” (190mm).
(3)
The oven and the empty vessel are at ambient temperature prior to the start of the test.
(4)
The initial temperature (T1) of the water is (10±2)°C (50°F) It is measured immediately before the water is added to the vessel. After addition of the water to the vessel, the load is immediately placed on the center of the turntable which is in the lowest position and the microwave power switched on.
(5)
The time T for the temperature of the water to rise by a value T of (10±2)°K is measured, where T is the time in seconds and T is the temperature rise. The initial and final water temperatures are selected so that the maximum difference between the final water temperature and the ambient temperature is 5°K.
(6)
The microwave power output P in watts is calculated from the following formula :
4187 x (T)
T
is measured while the microwave generator is operating at full power. Magnetron filament heat-up time is not included. (about 3 sec)
(7)
The water is stirred to equalize temperature throughout the vessel, prior to measuring the final water temperature.
(8)
Stirring devices and measuring instruments are selected in order to minimize addition or removal of heat.
7-3
WATER LOAD
TURNTABLE
P =
POWER OUTPUT MEASUREMENT
IMPORTANT NOTES:
UNIT MUST BE DISCONNECTED FROM ELEC­TRICAL OUTLET WHEN MAKING REPAIRS, RE­PLACEMENTS, ADJUSTMENTS AND CONTIN­UITY CHECKS. WAIT AT LEAST ONE MINUTE, UNTIL THE HIGH VOLTAGE CAPACITOR IN THE HIGH VOLTAGE POWER SUPPLY HAS FULLY DISCHARGED. THE CAPACITOR SHOULD BE DISCHARGED BY USING INSULATED WIRE - I.E. TEST PROBE CONNECTED TO 10K-OHM RESISTOR IN SERIES TO GROUND. WHEN RECONNECTING THE WIRE LEADS TO ANY PART, MAKE SURE THE WIRING CONNE­CTIONS AND LEAD COLORS ARE CORRECTLY MATCHED ACCORDING TO THE OVERALL CIR­CUIT DIAGRAM. (ESPECIALLY SWITCHES AND HIGH VOLTAGE CIRCUIT.)
A. REMOVING POWER AND CONTROL
CIRCUIT BOARD (Figures 1, 2 and 3)
(1) Remove a screw securing the control panel
assembly to the oven cavity. (2) Remove the control panel with pushing it upward. (3) Remove the three connectors (CN1, CN2) and
wire leads (Relay2 and Relay6) from the circuit
board.
CAUTION:The relay connector 2(White) and 6(Red) must be correctly connected Relay 2 and Relay 6 for each.These two connectors are not interchangeable.
(4) Remove 3 screws securing the circuit board.
(5) Remove the FPC connector from the terminal
socket following “HOW TO REMOVE THE FPC CONNECTOR” on the next page.
(6) Remove the circuit board from the control bracket
carefully.
7-4
Circuit Board
T
FPC Connector(S1)
Control Bracket
Circuit Board
Relay 2
Relay 6
Figure 1
Figure 2
Figure 3
DISASSEMBLY INSTRUCTIONS
Control Panel
Relay 2
Relay 6
(Relay 6)-Red
(Relay 2)-White
(CN1)
(CN2)
Screw
Power Transformer
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