IBM PCjr Hardware Maintenance And Service page 237

Error
Description
Power
Supply
Check
Diagnostic Action
3. Disconnect CN2. See Section 5,
"Locations." Plug in printer power cord.
Set printer Power switch to ON. Measure
voltages on the plug side of CN2 according
to the chart below.
DANGER: Line voltage is present on the AC
filter, circuit board and
transformer. Caution should be
exercised when measuring
secondary voltages.
Color + Lead
- Lead
Min.
Voltage
Max. 1
Voltage |
Gray
CN2-1
CN2-2 7.6 Vac 10.4 Vac
Orange
CN2-3
CN2-4
19.5 Vac
26.5 Vac 1
Red
CN2-5 CN2-6
8.1 Vac 10.9 Vac
Blue
CN2-7 CN2-8
13.0 Vac
17.6 Vac 1
Are the voltages in range?
YES: Go to step 4.
NO: Replace power transformer. See
Section 4, "Removal/Replacement
and Adjustments."
Graphics Printer 3-1400-7