6-26 TROUBLESHOOTING Manual 0463 413 001
CONTROL PCB3 - Power Supply Test
1) Check PCB LEDs status as follows
D35 PS OK ON
D36 3.3V_1 OK ON
D40 +24V_1 LOW OFF
D85 10.3_VB OK ON
D86 +5V_10 OK ON
If problem is found, remove power, disconnect the harness connectors from CONTROL PCB3 connector CN6.
Recheck CONTROL PCB3 LED status.
If findings are still incorrect replace CONTROL PCB3.
ENCODER PCB5-7 Test
The three encoder PCBs with harness and connector receive power from the USER INTERFACE PCB1 as follows:
ENCODER PCB5 to PCB1 Connector CN10
ENCODER PCB6 to PCB1 Connector CN11
ENCODER PCB7 to PCB1 Connector CN12
1) For the ENCODER PCB under test, disconnect the harness connector from PCB1. At the mating con-
nector at PCB1, measure from common pin 4, to pins 1, 2 & 3. All three should measure +3.3VDC. If
voltage is low or missing, replace USER INTERFACE PCB1.
2) Reconnect the harness connector back into the mating connector on PCB1
With the connector now installed, Measure from common pin 4, to both pin 1 and pin 2. As the encoder
is turned, the voltage will toggle between 0vdc and +3.3VDC
3) [For PCB7 only] Measure from common pin 4 to pin 3. When the encoder knob is depressed, the volt-
age will go from +3.3VDC to 0VDC and when encoder knob is released, will return to +3.3VDC.
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