GE JS998 Series, Technical Service Manual

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AC VOLTAGES
SERVICE MODE
Function
Main Pwr Board /
DWO Board Relay
ON=120VAC (L1-N or L2-N)
or 240VAC (L1-L2)
OFF=0V
Relay Control
ON = 0Vdc
OFF = 12Vdc
Relay Control
ON = 4.6Vdc
OFF = -14.0Vdc *
Enable = 4.2Vdc
Disable = -14.0Vdc
Notes
L2 = J4-8 (K1-NO)
MPB J1-10
MLB J3-10
N = J103
L2 = J4-7 (K5-NO)
MPB J1-9
MLB J3-9
N = J103
L1 = J4-5 (K13-NO)
MPB J1-4
MLB J3-4
N = J103
HVT T2 = L2 = J107 (K9-NO)
OR
HVT T3 = L2 = J105 (K9-NC)
MPB J1-17
MLB J3-17
OR
MPB J1-17 OFF
MLB J3-17 OFF
MPB J1-1
MLB J3-1
HVT T1 = L1 = J114
L2 = J4-9 (K106-NO)
MPB J1-3
MLB J3-3
N = J103
L1 = K10-NO
MPB J1-8
MLB J3-8
MPB J1-1
MLB J3-1
L2 = K102-NO (DLB)
MPB J1-12
MLB J3-12
L1 = J4-2 (K105-NC)
MPB J1-16 OFF
MLB J3-16 OFF
N = J103
L1 = J4-3 (K105-NO)
MPB J1-16
MLB J3-16
N = J103
L1 = K7-NO
MPB J1-6
MLB J3-6
MPB J1-1
MLB J3-1
L2 = K11-COM (DLB)
MPB J1-11
MLB J3-11
L1 = K8-NO
MPB J1-7
MLB J3-7
MPB J1-1
MLB J3-1
L2 = K11-COM (DLB)
MPB J1-11
MLB J3-11
L1 = J113 (K103-NO)
MPB J1-18
MLB J3-18
MPB J1-1
MLB J3-1
L2 = K11-COM (DLB)
MPB J1-11
MLB J3-11
L1 = J4-1 (K2-COM)
MPB J1-14
MLB J3-14
N = J103
L1 = K14-NO
LRB J9-4
MLB J4-4
LRB J9-2
MLB J4-2
L2 = K121-COM (DLB)
LRB J9-7
MLB J4-7
L1 = K17-NO
LRB J9-5
MLB J4-5
LRB J9-2
MLB J4-2
L2 = K121-COM (DLB)
LRB J9-7
MLB J4-7
L1 = K20-NO
LRB J9-6
MLB J4-6
LRB J9-2
MLB J4-2
L2 = K121-COM (DLB)
LRB J9-7
MLB J4-7
N = J11-1 (K16-NO)
OR
Plunger Switch - NO
MPB J9-10
MLB J4-10
L1 = J114
N = J11-3 (K15-COM)
AND
Plunger Switch - NC
MPB J9-13
MLB J4-13
L1 = J114
L1 = J11-4 (K122-NC)
MPB J9-12
MLB J4-12
N = J103
L1 = J11-5 (K122-NO)
MPB J9-12
MLB J4-12
N = J103
Note : Ground reference for dc voltage measurements MPB = Main Power Board * OFF = 0Vdc if Disable = -14Vdc
is J3-2 or J3-4 on MPB or J5-2 or J5-4 on MLB MLB = Main Logic Board ** Lower oven cooling fan may take up to 90 min. to turn off.
LRB = Lower Oven Relay Board
K4 (Convection Fan Relay) must be
energized
MPB J1-15 ON (0Vdc)
MLB J3-15 ON (0Vdc)
Convection Fan
Lower Clockwise
CookingLoads
-> down arrow
-> ConvFan -> CW
Broil upper must be turned off
Convection Element
Upper
CookingLoads -> up arrow
-> ConvElem
Bake Element Upper
CookingLoads -> up arrow
-> Bake
Bake2 Element Upper
CookingLoads -> up arrow
-> Bake2
Broil Lower and Bake Lower must be
turned off
Broil Element Upper
CookingLoads -> up arrow
-> Broil
Door Latch Upper
DoorLatch -> up-arrow
-> Lock/Unlock
Vent Fan
VentFan -> On/Off
Microwave
CookingLoads -> up arrow
-> MW
Broil Element Lower
CookingLoads
-> down arrow -> Broil
Right Cooling Fans
Right Cooling Fan Upr
Cooling Fan Lwr
R CoolingFans -> On/Off
Left Cooling Fans
Mag Stirrer
Mag Fan
HVT Fan
L CoolingFans -> On/Off
K4 (Convection Fan Relay) must be
energized
MPB J1=15 ON (0Vdc)
MLB J3-15 ON (0Vdc)
Convection Fan
Upper Counter
Clockwise
CookingLoads -> up arrow
-> ConvFan -> CCW
Oven Lights Upper
Ovenlight -> up-arrow -> On/Off
Convection Fan
Upper Clockwise
CookingLoads -> up arrow
-> ConvFan -> CW
Oven Light Lower
Ovenlight -> down arrow
-> On/Off
Bake Lower
CookingLoads
-> down arrow -> Bake
Broil Lower must be turned off
Convection Element
Lower
CookingLoads
-> down arrow -> ConvElem
Convection Fan
Lower Counter
Clockwise
CookingLoads
-> down arrow
-> ConvFan -> CCW
ConvFan Disabled by Plunger Switch
when Door is Open
K18 (Conv Fan Low Relay) must be
energized
LRB J9=11 ON (0Vdc)
MLB J4-11 ON (0Vdc)
ConvFan Disabled by Plunger Switch
when Door is Open
K18 (Conv Fan Low Relay) must be
energized
LRB J9-11 ON (0Vdc)
MLB J4-11 ON (0Vdc)
Broil upper must be turned off
Door Latch Lower
DoorLatch -> down arrow
-> Lock/Unlock
Door Latch Motor Disabled by Plunger
Switch when Door is Open
DC VOLTAGES
K6 (Mag Main Relay) must be energized
MPB J1-5 ON (4.6Vdc)
MLB J3-5 ON (4.6Vdc)
Note: MagTap is automatically selected
by Line Voltage
Fan comes on when entering the
cooking loads menu.
Fan comes on when entering the
cooking loads menu.
Fan comes on when entering the
cooking loads menu.
RELAY CONTROL TABLE - DOUBLE WALL OVEN