Testing The Rs232 Port - GE MAC 1600 Service Manual

Troubleshooting
Steps for Writer Test Failure (cont'd.)

Testing the RS232 Port

Use the RS232 Test to determine if the Com ports are working properly.
1. Open the Diagnostic Tests window as described in
Diagnostics Function" on page
2. Use a paper clip to short pins 2 and 3 on COM A.
42
Observed Failure
Incorrect print speed
Writer paper does not move
Paper moves but lines do not
print
1 The roller is included with paper tray assembly.
2 The stepper motor is included with paper tray assembly.
3 the stepper motor is included with paper tray assembly.
Faulty stepper motor.
Replace the paper tray assembly.
Refer to "Replacing the Paper Tray Assembly" on
page 64.
Replace the printer board.
Refer to "Replacing the Printer Board" on page
Faulty stepper motor.
Replace the paper tray assembly.
Refer to "Replacing the Paper Tray Assembly" on
page 64.
Replace the printer assembly.
Refer to "" on page
Faulty cables in printer assembly.
Refer to "Replacing the Printer Assembly" on page
83.
Replace the printhead.
Refer to "Replacing the Printhead" on page
33.
MAC™ 1600
Remedy
2
3
.
88.
"Accessing the System
2028451-183E
86.