Kurzweil K250 - Power Supply and Test Execution

4.3 - POWER SUPPLY (POD) VOLTAGES
Before beginning the diagnostic test procedure, please· be sure
that the power
supply voltages are correct. Verify the following:
r .
1. The Power Supply (POD) provides:
+5 volts DC
+15 volts DC
-15 volts DC
2. Using a VOM or DVM check the power supply voltages at the
following power connectors:
P34 ON CPU BO ARD
_____ 14rO 20 1 t .. ~_
YELLOW+5V
BROWN GROUND
P29B ON CH ANNEL BO ARD
70 80 90
40 50 60
3C
1 G) 2(
,-",,,,,j
RED +15V
BLACK GROUND
RED -15V
P21 ON CPU BOARD
10 4{P1 ........ -
YELLOW -15V
20 50
3~ 60
ORANGE GROUND
P24 ON CHANNEL BOARD
30 20
1 11: .. ! ...... .
YELLOW +5V
BROWN GROUND
Kurzwell 250 Service Manual, Chapter 4
4-3