Sharp R-8320E - Page 4

HeaterRelay..
.........................................................
..$4
StopSwitch..............................................................4 4
Door Open Mechanism.
.....................................................
.44
Convection Cooking System
..................................................
.45
HeatingElement...........................................................4 5
Upper and Lower Latch Switches.
..............................................
.45
Monitor Switch (Australia Model).
.............................................. .46
PowerTransformer.........................................................4 6
Voltage Doubler Circuit
..................................................... .46
MagnetronTube...........................................................4 6
Damper Operation.
........................................................
.47
RelayUnit...............................................................4 8
CHAPTER IV SERVICING
.....................................................
..5 1
Troubleshooting Guide.
.........................................................
.51
Off Condition.
...........................................................
.51
Microwave Cooking Condition.
................................................
.52
Convection Cooking Condition
................................................ .53
Test Procedures.
..............................................................
.54
Magnetron Assembly Test.
...................................................
.54
Power Transformer Test.
....................................................
.55
RectifierTest.............................................................5 5
High Voltage Capacitor Test
.................................................. .56
Upper Latch Switch Test
....................................................
.56
Lower Latch Switch Test
....................................................
.56
MonitorSwitchTest........................................................5 6
BlownFuse..............................................................5 7
Magnetron Therm0 Cut-out Test
...............................................
.57
Cook Relay or Heater Relay Test.
..............................................
.57
StopSwitchTest...........................................................5 7
Touch Control Panel Assembly Test
.............................................
.57
Heating Element Test.
......................................................
.58
ThermistorTest...........................................................5 8
Damper Motor Test.
.................................. _
.................... .58
Damper Switch Test.
....................................................... .58
RelayUnitTest............................................................5 9
CHAPTER V TOUCH CONTROL PANEL ASSEMBLY
...............................
.60
Outline of Touch Control Panel ....................................................
.60
KeyUnit................................................................6 0
ControlUnit..............................................................6 0
Description of LSI.
..........................................
.:
................
.63
LSI (l-l : IX2107YA). ......................................................
.63
LSI (l-l: IX2075YA). ...............................
:
......................
.69
Power Source Circuit ............................................................
.75
/3Circuit..
................................................................ ..7 6
ACLCircuit..................................................................7 6
BuzzerCircuit.................................................................7 6
Thermistor Sensor Circuit.
.......................................................
.77
Indicator Circuit.
.............................................................
.78
Servicing....................................................................7 9
Checker.....................................................................B 0
UseofChecker............................................................8 0
Connection Method.
.......................................................
.80
External of Checker.
.......................................................
.81
Checker Circuit Diagram.
....................................................
.82
TestProgram.................................................................8 3
Troubleshooting Guide.
.........................................................
.87
Adjustment of Thermistor Sensor Circuit. ............................................. .97
3