Main Logic Board (Cbnp - OKIDATA Pacemark 3410 Service Handbook

A.2.01

Main Logic Board (CBNP)

Firmware
Q4 - Program ROM
Fuses
F1 3.5 amp 125V
Jumpers
S2: SHORTED - Pacemark Emulation ROM Installed
Sensors
NONE
Switches
NONE
Test Points
+ 38vdc
Printhead, SP Motor, LF Motor and Bail Motor drive voltage.
Check on both ends of Capacitor C4.
+ 5vdc
Integrated Circuit Logic / LED drive voltage.
Check between pin 24 of Q5 and the power bar.
+ 8vdc
Line feed motor holding voltage and serial interface line voltage.
Check on Pin 6 of Connector CN7.
- 8vdc
Serial interface line voltage.
Check on Pin 7 of Connector CN7.
Board Diagrams A - 4 Pacemark 3410 Service Handbook