GE ZEK957 Series Technical Service Manual
27-in. built-in electric wall oven
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Summary of Contents for GE ZEK957 Series
- Page 1 GE Consumer Home Services Training TECHNICAL SERVICE GUIDE 27-In. Built-In Electric Wall Oven MODEL SERIES: ZEK957 ZEK937 JKP56 JCKP15 JKP45 JKP15 JKP27 JCKS05 JCKP18 JKS05 JKP18 JKP85 PUB # 31-9084 07/01...
- Page 2 If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened. GE Consumer Home Services Training Technical Service Guide Copyright © 2001 All rights reserved.
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Page 3: Table Of Contents
Table of Contents Table of Contents Introduction ....................3 Nomenclature ..................... 4 Control Panel Features5 ................5 Component Locator Views ................. 11 Oven ......................15 Lift-Off Oven Door ..................15 Door Assembly ................... 15 Oven Door Gasket ..................16 Door Hinge Assemblies ................17 Door Hinge Replacement ................ - Page 4 Table of Contents Table of Contents Microwave ....................29 Microwave Removal ................. 30 Microwave Outer Case Removal .............. 30 Microwave Door ..................30 Microwave Control Panel ................. 31 Microwave Power Control Board (PCB) ........... 32 Microwave Low-Voltage Transformer ............32 Microwave Key Panel Test ...............
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Page 5: Introduction
The new 27-in. Built-In Electric Wall Ovens make understand and easy to operate. Just read and an eloquent statement of style, convenience, and touch. It’s easy to see how GE’s fresh ideas can kitchen planning flexibility. Added to the single make anyone more creative in the kitchen! oven and double oven models is our new microwave-and-oven combination unit. -
Page 6: Nomenclature
Nomenclature Model Number J K P 4 5 C D 1 C C GE Cooking Product Product Color ZE = Monogram Electric CC = Bisque WW = White BB = Black AA = Almond Configuration SS = Stainless Steel K = 27-in. Wall Oven CK = Camco 27-in. -
Page 7: Control Panel
Control Panel Features Oven Controls Model JKP15 Throughout this manual, features and appearance may vary from your model. Oven Control, Clock and Timer Features and Settings BAKE Pad DELAY START Pad Use along with COOKING TIME or SELF Press this pad to select the bake function. CLEAN pads to set the oven to start and BROIL HI/LO Pad stop automatically at a time you set. - Page 8 Oven Controls Models ZEK957, ZEK937, JKP56, and JKP18 Throughout this manual, features and appearance may vary from your model. LOWER OVEN UPPER OVEN Double oven control shown. Oven Control, Clock and Timer Features and Settings BAKE Pad SELF CLEAN Pad Press this pad to select the bake function.
- Page 9 Oven Controls Models JKP45 and JKP27 Throughout this manual, features and appearance may vary from your model. (on some models) Oven Control, Clock and Timer Features and Settings BAKE Pad OVEN LIGHT ON/OFF Pad Press this pad to select the bake function. Press this pad to turn the oven light on or off.
- Page 10 Oven Controls Model JKS05 Throughout this manual, features and appearance may vary from your model. Oven Control, Clock and Timer Features and Settings BAKE Pad DELAY START Pad Use along with COOKING TIME pad to set Press this pad to select the bake function. the oven to start and stop automatically at a Display time you set.
- Page 11 Throughout this manual, features and appearance may vary from your model. Oven Controls Model JKP85 Note: The time on the microwave display is shown in minutes and seconds (1:30 is one minute, 30 seconds). On the lower oven, time is shown in hours and minutes (1:30 is one hour, 30 minutes).
- Page 12 Microwave Controls Model JKP85 Microwave Oven Control Features and Settings Display Number Pads After pressing a function pad, press the Displays the time during cooking number pads to set the exact amount of functions, the power level being used, time you want to cook for. For example; if the Auto Codes, the Auto Defrost food you press the 1, 2 and 5 pads, you have set weights, the cooking mode and...
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Page 13: Component Locator Views
Component Locator Views Model JKP85 (Microwave) Air Duct Magnatron TCO Oven Lamp Assembly Magnatron Interlock, Monitor, and Door Sensing Switches Connectors High- Voltage Capacitor High- Voltage High-Voltage Diode Fuse Fan TCO Transformer Power Control Board (PCB) PC Boards Low-Voltage Transformer Flame Sensor Sensor... - Page 14 Model JKP45 (Double Oven) Fan Thermal Lock Motor Switch Cooling Fan Connector Power Connector Door Lock Thermal Switch Lock Motor Door Jam Switch Harness Top View Rear View Upper Oven Thermal Switch Lower Oven Cooling Fan Lower Oven Thermal Switch –...
- Page 15 Model JKP45 (Double Oven) Upper Lock Mtr Lower Lock Mtr (L1 + N) (Upper Oven Temp Keyboard (Lower Oven Temp Sensor, LKSW1, Ribbon Sensor, Therm SW, and LKSW2) Connector LKSW1, and LKSW2) Oven Sensor Door Jam SW Door Lock Therm SW, Motorized Door Lock, Fan Therm SW Oven Light...
- Page 16 Model JKP15 (Single Oven) Broil TCO + Light Oven Lamp Bake (OV1) Lock Motor Neutral Neutral Lock Motor, Oven Sensor, LKSW 1, LKSW 2 Keyboard Ribbon Connector Power Lock Motor Connector Connector Cooling Fan Fan Thermal Switch Top View Door Lock Thermal Switch Rear View...
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Page 17: Oven
Oven Lift-Off Oven Door Caution: Do not lift the door by the handle. To remove the door: 1. Fully open the door. Slot 2. Push the hinge locks down toward the door frame, to the unlocked position. This may require a flat-blade screwdriver to start the hinge Hinge arm locks moving. -
Page 18: Oven Door Gasket
3. Remove 2 screws from each side of the door on the liner. 4. Separate the liner assembly and the outer glass assembly. 5. Remove 2 screws from the door handle near 2 Screws the door vent trim. 6. Slide the bottom trim and the top vent trim out to free the outer door glass. -
Page 19: Door Hinge Assemblies
3. Continue this process all the way around the inner panel until all clips have been inserted. Door panel 4. With a small screwdriver, tuck the loose ends of the gasket into the slots at the center bottom of the door panel. Be sure to leave a 6-in. gap in Gasket the gasket at the bottom of the door. -
Page 20: Electronic Oven Control System
There are 5 basic control panel assemblies. They LIGHT can be found listed by model number in the Con- trol Panel Features section on pages 5 through 10. Models ZEK957, JKP56, and JKP45 Control Panel Access 1. Disconnect the power and open the oven door.... -
Page 21: Control Voltage
OVL1-OVL2 120 VAC when light is off AUX2 - N 120 VAC locking or unlocking AUX1 - N 120 VAC locking or unlocking Models ZEK957, JKP56, and JKP45 TERMINALS VOLTAGE Model JCKP18 L1-N 120 VAC ALL THE TIME N to COM, COM 0,C... -
Page 22: Ohmmeter Test
Min Up 8 — 14 Temp Up 6-14 8-14 Min Dn 7 — 14 Temp Down 5-14 7-14 Models JKP56 and ZEK957 UPPER OVEN LOWER OVEN FUNCTION CONDUCTOR CONDUCTOR Bake 2 — 14 10 — 14 Broil 2 — 13 10 —... -
Page 23: Erc Failure Codes
After that, the F-code continuously for 5 minutes before an F-code is will be displayed. They can be recalled by pressing recorded (F2, F8 are sooner). Models ZEK957, JKP56, JKP45, JCKP18, and JKP18 CORRECTION MEANING F A I L U R E... - Page 24 Model JKP85 FAILURE MEANING CORRECTION CODE -F0- Stuck key pad Determine if problem is with the Key Panel or Control by: -F7- May mean relay is 1. Pushing CLEAR/OFF pad, turned on. 2. Disconnecting Ribbon Cable from control and waiting at least 3 minutes to see if Code recurs.
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Page 25: Special Functions
*Display will start to cycle through the different modes of operation. • Sabbath Mode (GE models only) disables all but bake, timebake, no beeps, and 12h shut- down override, and puts symbols on red display during bake. Access by pressing Delay Start pad until display shows Sabbath. -
Page 26: Oven Sensor And Door Switch Ohmmeter Test
Oven Sensor and Door Switch Sensor and Lock Switch Connectors Ohmmeter Test Models ZEK957, JKP56, and JKP45 Motorized Door Lock Operation , page 26, for LOCK SW. #2 UPPER OVEN SENSOR door switch function explanation. AND LOCK SWITCH CONNECTOR UNLOCK LOCK Disconnect power to range. -
Page 27: Oven Circuits
Oven Circuits "L-2" BAKE/TIME BAKE/CLEAN (SEE NOTE) "L-1" * Bake and broil units cannot be on at the same time. BAKE BAKE • Bake and Broil units time-share during and 2640 W / 21Ω after preheat. There is approx. 1 minute of Thermal Switch Thermal Switch 300˚F Manual... -
Page 28: Motorized Door Lock
Motorized Door Lock The motorized door lock assembly is located above the oven. The assembly consists of a lock motor cam and switch assembly, lock hook, heat barrier, and mounting plate. Access to this assembly, for single and upper ovens, is behind the control panel. For lower Single &... -
Page 29: Oven Thermal Switch
Oven Thermal Switch A self-resetting, disc-type thermal cutout switch is mounted to the rear of the oven. The switch will open the L2 leg of the power to the heating elements in the event of an overtemperature condition. Single and lower oven switch opens at Thermal 250 °F. -
Page 30: Convection Bake Element And Fan Assembly
Convection Bake Element and Fan Assembly The convection bake element and fan assembly CONV. OUTER are located on the back wall of the oven liner BACK MTG. behind the panel with the screen in the center. PANEL SCREWS OVEN INSULATION To access convection bake element: OVEN LINER... -
Page 31: Microwave
Microwave WARNING: DISCONNECT POWER BEFORE SERVICING. Reconnect all grounding devices. All parts of this appliance capable of conducting electrical current are grounded. If ground wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened. -
Page 32: Microwave Removal
Microwave Removal The microwave is fastened to the top of the lower oven by 2 screws in the front and metal tabs in the Screws rear which insert into slots in the unit’s frame. The microwave can be easily removed from the lower oven without removing the unit from the wall. -
Page 33: Microwave Control Panel
3. Place the door on its front. At the latch open- ing, insert a small screwdriver into the gap between the metal inner door frame, attached around the door circumference, and the viewing surface. Pry up to disengage the hooks for removal. 4. -
Page 34: Microwave Power Control Board (Pcb)
Microwave Power Control Board (PCB) The PCB is mounted to the control panel and can be accessed by placing the control panel in the service position. To remove the PCB: 1. Place the control panel in the service position. , e l 2. -
Page 35: Microwave Key Panel Test
Microwave Key Panel Test The control panel circuits from the keys to the PCB can be verified by a continuity test. Refer to the chart in the mini-manual located behind the control panel. Microwave High-Voltage Capacitor WARNING: Always be certain the capacitor is discharged before servicing. -
Page 36: Microwave High-Voltage Diode
Microwave High-Voltage Diode The microwave must be removed from the oven to service the high-voltage diode. WARNING: Discharge the high-voltage capacitor before touching any oven components or wiring. The high-voltage diode is connected to the high-voltage capacitor and is grounded to the chassis. High-Voltage Diode Test To test diode for a short: 1. -
Page 37: Microwave High-Voltage Transformer
Microwave High-Voltage Transformer WARNING: Discharge the high-voltage capacitor before touching any oven components or wiring. High-Voltage The microwave must be removed from the oven to Transformer service the high-voltage transformer. The high-voltage transformer is mounted to the microwave baseplate with 4 Phillips screws. High-Voltage Transformer Test 1. -
Page 38: Microwave Magnetron Fan
Magnetron Test 1. Isolate the magnetron from the high-voltage circuit by disconnecting the magnetron con- nector. 2. Check for continuity across the magnetron filament leads with an ohmmeter. Resistance should be less than 1 ohm. 3. Check for continuity between one magnetron filament lead and the chassis ground. -
Page 39: Microwave Fan Thermal Switch
close at 140 °F, restoring function to the unit. If the magnetron TCO has opened, check for fan failure, obstructed air ducts, or dirty or blocked air intake. Microwave Fan Thermal Switch Obtain access to the fan TCO by placing the control panel in the service position. -
Page 40: Microwave Gas (Humidity) Sensor
Microwave Gas (Humidity) Sensor The microwave must be removed from the oven to service the gas sensor. A gas sensor is used in AUTO COOK mode to monitor increasing humidity (steam) and hydrocar- bons (food odors) during cooking. When vapor increases in the oven due to cooking, the resis- tance of the sensor changes. - Page 41 nents, except the oven lamp. A cook cycle cannot Interlock System Test take place until the door is firmly closed, thereby 1. Remove the oven and discharge the capacitor. activating the interlock switches. 2. Check the 20-amp fuse for continuity and •...
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Page 42: Microwave Oven Lamp Assembly
Microwave Performance Test Microwave Oven Lamp Assembly This test will verify that the microwave oven high- The microwave must be removed from the oven to voltage and magnetron circuits are operating to service the oven lamp assembly. performance specifications. The oven lamp assembly is located in the air duct The standard load is 1 liter (1000 ml) of water with at the top of the component compartment. -
Page 43: Microwave Fault Codes
To perform a microwave leak test: 1. Place 275 ml of water in a 600-ml beaker (WB64X5010). 2. Place the beaker in the center of the oven on the turntable. 3. Set the leakage meter to the 2450 MHz scale. 4. -
Page 44: Microwave Diagnostic Charts
Microwave Diagnostic Charts Microwave Control and/or Display Does Not Operate Properly Note: Use this diagnostic procedure if unit has one of the following malfunctions: • No beep (check control program for beeper MUTE) • Some or all keys do not operate (check for Child Lock Out) •... - Page 45 Microwave Unit Dead Check fuse. Is fuse blown? Check: 120 VAC Perform Monitor Magnetron TCO Repair or replace Switch Test. Flame TCO faulty component. Replace monitor. Pass test? All OK? Visually inspect Check for continuity: varistor. Black wire - line-in to Replace PCB.
- Page 46 Microwave Oven Runs but Inadequate/No Heating Note: Verify line voltage under full load. Plug oven in, place test load in oven, select high power, turn oven Open primary on, and check primary Does turntable volts to high-voltage interlock switch motor operate? circuit.
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Page 47: Schematics And Wiring Diagramsx
Schematics and Wiring Diagrams Models ZEK957, JKP56, and JKP45 Schematic – 45 –... - Page 48 Model JKP27 Schematic – 46 –...
- Page 49 Models ZEK937, JKP18, and JKP15 Schematic – 47 –...
- Page 50 Model JKS05 Schematic – 48 –...
- Page 51 Model JCKS05 Schematic – 49 –...
- Page 52 Models JCKP18 and JCKP15 Schematic – 50 –...
- Page 53 Model JKP85 Schematic – 51 –...
- Page 54 Microwave Schematic – 52 –...
- Page 55 Model ZEK957 Wiring Diagram – 53 –...
- Page 56 Model ZEK937 Wiring Diagram – 54 –...
- Page 57 Model JKP56 Wiring Diagram – 55 –...
- Page 58 Model JKP45 Wiring Diagram – 56 –...
- Page 59 Model JKP27 Wiring Diagram – 57 –...
- Page 60 Model JCKP18 Wiring Diagram – 58 –...
- Page 61 Model JKP18 Wiring Diagram – 59 –...
- Page 62 Model JCKP15 Wiring Diagram – 60 –...
- Page 63 Model JKP15 Wiring Diagram – 61 –...
- Page 64 Model JCKS05 Wiring Diagram – 62 –...
- Page 65 Model JKS05 Wiring Diagram – 63 –...
- Page 66 Model JKP85 Wiring Diagram – 64 –...
- Page 67 Microwave Wiring Diagram FAN THERMAL SW N.O. – 65 –...
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Page 68: Quizz
Quiz 1. If the voltage output or resistance of the low- 6. What test is made to check for a damaged voltage transformer is not correct in either the varister? oven or the microwave, you should replace the __Resistance __Voltage __Visual PCB. -
Page 69: Warrantiesx
Any part of the oven which fails due to a defect in materials or workmanship. From the date of the During this full one-year warranty, GE will also provide, free of charge, all labor original purchase and in-home service to replace the defective part. - Page 70 Any part of the microwave cooking center which fails due to a defect in materials From the date of the or workmanship. During this full one-year warranty, GE will also provide, original purchase free of charge, all labor and in-home service to replace the defective part.