Part 7:
SOLID STATE CIRCUIT BOARDS
7.4.3 Touchpad/Display
Refer to Fig. 7.4.2 and the instructions on page 76 and the test point descriptions below.
Touchpad Display Connectors:
Status
LED —
4 pin cable connects to CN4 on the Timer Control Board.
Cable
LED’s are: Power, Start, and Extended Wash
There are no test points on the cable
Wash/
3 pin cable connects to CN5 on the Temperature/Pressure Display Board.
Rinse
LED’s are: Wash and Rinse (For Models UH-200B, UH-200 only)
LED —
There are no test points on the cable.
Cable
Touchpad Pushbutton Cable —
8 pin cable connects to CN2 on the Timer Control Board.
To test the pushbuttons:
1.
Disconnect the cable from CN2 on the timer board.
2.
Gently fold the cable connector back to reveal the contacts on the
backside of the connector.
3.
Make sure the cable is oriented to match the detail in Fig. 7.4.3.
4.
Connect the VOM and press the pushbutton to check for continuity.
NOTE:
Fig. 7.4.3 shows the prime pushbuttons for all models. In reality, there
are three separate touchpad/display assemblies.
Models UH-200B, UH-200
are the only models with the Wash/Rinse LED cable.
These models have one prime pushbutton which operates both optional
detergent and rinse aid pumps simultaneously.
Models UH-100B, UH-100
have one prime pushbutton which operates both
optional detergent and rinse aid pumps simultaneously.
Model UL-100
has three prime pushbuttons which operate the standard
detergent, sanitizer, and rinse aid pumps separately.
NOTE:
There are
NO hidden pushbuttons
on the touchpad/display.
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