IBM PCjr

Error
Description
Power
Supply
Check
Diagnostic Action
4. Set the printer Power switch to OFF.
Connect CN2. See Section 5, "Locations."
Power ON then measure voltages at CN3
(see Section 5, "Locations") as shown in the
chart below. Use the ground pin on the
drive circuit card.
DANGER: Line voltage is present on the AC
filter, circuit board and
transformer. Caution should be
exercised when measuring DC
voltages.
Pin No.
Min.
Voltage
Max.
Voltage
CN3-16 4.5 Vdc
5.6 Vdc
CN3-20 11.0 Vdc
15.4 Vdc
Are + 5 and + 14 Vdc within range?
YES: Go to step 5.
NO: Replace both control cards. See
Section 4, "Removal/Replacement
and Adjustments."
3-1400-8 Graphics Printer