Power Supply Board (Pwu-150) - OKIDATA OF1000 Service Manual

A.2.03 Power Supply Board (PWU-150)
Function
The power supply board converts the AC input voltage into +5 vdc, +/-12 vdc, and +38 vdc for use
throughout the printer.
Firmware
NONE
Fuses
F1: 6.3 amp 125 vac. AC line protective fuse.
F2: 3.5 amp 125 vdc. Protects the +38 volt circuit. (Soldered)
F3: 5.0 amp 125 vdc. Protects the +5 volt circuit. (Soldered)
Jumpers
NONE
Switches
SW1: AC power switch
Test Points and Output Ratings
Pin Number
CN3 Pins 8 9
CN2 Pins 6 7
CN4 Pins 8to
10
CN3 Pins 2 3
CN2 Pins 1 2
CN3 Pin 1 CN4
Pins 1 2
CN3 Pin 4 CN4
Pins 3 4
Rated Rated
Voltage Current
+ 5 2.5 A
vdc
+ 38 2.2 A
vdc
+ 12 0.3 A
vdc
- 12 0.1 A
vdc
Service Guide OF1000
Chapter A Reference Charts
Current Voltage
Range Range
.3 to +5V +/- 5%
5.3 A
0 to +34V to
2.8 A +41V
0.1 to +12V +/-
0.5 A 5%
0.1 A -12V +/-
5%
Page: 196
Output
Ripple
100 mV
1000
mV
100 mV
100 mV