North Star DIMENSION Service Manual page 233

SUBASSEMBLY REMOVAL
Installing a New Central PCB
Introduction
The central PCB is more difficult to replace
than other circuit boards because its replacement
involves more than a simple reversal of the
removal procedure. Follow the steps below, and
do not attempt to replace the PCB before reading
through the entire procedure.
Procedure: Installing a New Central PCB
1. Check and replace any defective nylon standoffs used to
support and attach the new central PCB to the central module
base. Be certain all five standoffs are completely seated
and biased toward the rear of the central module.
2. Check and replace any defective nylon standoffs used to
support and attach the bus and central RAM expansion PCB's to
the central PCB.
3. Hold the new central PCB near its final assembly position,
and elevate the front edge of the circuit board. Slide the
board toward the rear of the central module, and fit the
printer ports through the appropriate slots in the central
module rear panel.
4. After biasing the circuit board against the central module
rear panel, gently press the PCB onto the nylon standoffs.
Note: Do not allow to PCB to slide forward after you have
seated it.
5. While continuing to press the PCB against the central module
rear panel, insert the two screws through the rear panel into
the circuit board.
Technical Manual 6-19