Component Testing Chart - Jenn-Air W11356996 Service Manual

Unplug coffee system or disconnect power before performing the
following checks:
■ A potential cause of a control not functioning is corrosion
on connections. Observe connections and check for
continuity with an ohmmeter.
■ All tests/checks should be made with a VOM or
DVMhaving a sensitivity of 20,000 Ω per VDC or greater.
■ Check all connections before replacing components,
looking for broken or loose wires, failed terminals, or
wires not pressed into connectors far enough. Damaged
harness must be entirely replaced. Do not rework a
harness.
■ Resistance checks must be made with power cord
unplugged from outlet, and with wiring harness or
connectors disconnected.
COMPONENT FROM
UI/Display PCB Main Board - J13
EV1, 3-Way Valve L1 Junction Block
EV2, 2-Way Valve L1 Junction Block
EV3, 2-Way Valve (Hot L1 Junction Block
Water)
Fan Cooling LED Fan PCB - X3
Flowmeter Main Board - J7
Grinder Motor F1 (L1)
Hall Sensor Main Board - J8
Coffee Heater L1 Junction Block
Steam Heater L1 Junction Block
Group Infusion Motor J1-5
For Service Technician Use Only

Component Testing Chart

TO VOLTAGE
Main Board - J13 Pin 1 = +5 VDC
Pin 2 = TX BUS (MAX 5 V)
Pin 3 = TX BUS (MAX 5 V)
Pin 4 = GND
Pin 5 = -7 VDC
Pin 6 = DATA OUT (MAX 5 VDC)
Pin 7 = DATA IN (MAX 5 VDC)
Pin 8 = CLOCK (MAX 5 VDC)
Main Board J1-2 120 VAC
Main Board J1-1 120 VAC
Main Board - F10 120 VAC
LED Fan PCB - X3 Pin 1 = +12 VDC (red)
Pin 2 = GND (black)
Main Board - J7 Pin 1 - 2 = 5 VDC
Pin 2 - 3 = 0 VDC
Pin 2 - 3 = 5 VDC
Main Board - F7 120 VAC
Main Board - J8 Pin 1 = +5 VDC (black)
Pin 2 = Signal (max 5 VDC)
(gray)
Pin 3 = GND (gray)
Main Board - F9 120 VAC
(N)
Main Board - F8 120 VAC
(N)
J1-3 140 VDC*
Do not continue with the diagnosis of the appliance if a fuse is
blown, a circuit breaker is tripped, or if there is less than
120 +10%/-15% V power supply.
The coffee system must be unplugged or the power disconnected
when measuring resistance.
When checking for proper voltage, complete the following steps:
1. Disconnect power.
2. Connect voltage measurement equipment.
3. Reconnect power and confirm voltage reading.
4. Disconnect power after performing voltage measurements.
RESISTANCE
N/A
458K ohms
444 ohms
444 ohms
N/A
N/A
13.1 ohms
N/A
11.4 ohms
15.4 ohms
62 ohms
JennAir Built-in Coffee System
COMPONENT TESTING
NOTES
Connector going to Display
PCB. Supplies circuit
ground, +5 VDC, -7 VDC and
transmission lines.
NOTE: 12 VDC is provided
when measuring the
differential between +5 VDC
and -7 VDC.
Drain Valve is grounded to
heat exchanger support.
Water Valve is grounded to
upper reinforcement, lower
and upper Main Board cover,
and heat exchanger support.
Valve is grounded to upper
reinforcement, lower and
upper Main Board cover, and
heat exchanger support.
Digital motor - resistance
cannot be measured.
The Flowmeter measures the
water used.
Can be adjusted only while
grinding.
Current sensor on the
diverter motor assembly that
identifies the position of the
diverter motor.
Dual heater element (23
ohms/heater). Check TCOs if
circuit is open.
Check TCO if circuit is open.
*Voltage polarity reverses to
drive the motor up and down
n
3-9