Checking The Auxiliary Voltage; Checking The Control Board - powersoft DigiMod PFC2 Service Manual

Check of the auxiliary voltage
In order to check the AUX Voltages, leave both power
supplies on as for the previous test (120 Vdc) and probe
on the indicated points with a multimeter.
PFC2: (Fig. 19)
PFC4: (Fig. 20)
Please refer to the following table when ordering the
repair Kit.
Model Kit Number
DigiMod PFC2 KT000890.R
DigiMod PFC4 KT000843.R

Checking the Control Board

This step is common to both PFC2 and PFC4 modules.
Leave both power supplies on as for the previous test (120
Vdc)
With an oscilloscope probe on the points highlighted on
(Fig. 21), measuring the 12.288 MHz signal of the control
board's quartz.
Repeat the procedure on each Control Board (PFC4).
Description
KIT DM PFC2 PSU
KIT DM PFC4 PSU
-12Vdc 5Vdc
5Vdc
-12Vdc
DigiMod PFC2 - PFC4 | SERVICE MANUAL
(Fig. 19)
(Fig. 20)
(Fig. 21)
+12Vdc
+12Vdc
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