GE MAC 1200 ST

5-4 MAC 1200 resting ECG analysis system Revision D
2012250-095
Troubleshooting: Basic Information
No Display On the Screen
 Does the yellow Stop LED on the keypad glow after the device is switched on?
If not: Refer to “Device cannot be switched on ....”
If yes: Continue
 Does a beep sound approximately 10 seconds after switching on the MAC1200
occur (indicates the successful power up self-test)?
If not: Self test error, PCB Control defective
If yes: Continue
 Contrast badly adjusted?
 Can the background illumination be activated by pressing a key?
 Can the display test in Chapter 3, “Display Test” be applied successfully?
If not: Graphics display module defective or PCB Control defective
Error In Self-Test Identified
When an error is detected during the self-test, in addition to the message Self-test
failed, the error code number and a short description also appear on the display. The
meaning of the error codes are described in
Chapter 3, “Self-Test”. The error codes
refer to the PCB Control, and should be noted as information for the service center.
MAC 1200 Fails to Give Printout, No Paper Transport
Perform the following test in the 6-lead operating mode.
 Is paper available? Is paper correctly inserted? Are there paper transport
problems (jam)?
 Is the paper feed flap correctly engaged on both sides?
 After pressing the start key, the green start LED must glow.
If not: Is the keypad defective? Apply keypad test in Chapter 3, “Keyboard
Test” section.
If yes: Continue.
 Is the mark reader defective or not plugged in?
 Are all connections for the printhead and motor plugged in?
 Is the motor blocked? (check roller, transmission)
 Is the unit operating only on battery which is strongly depleted?
If yes: Plug in power plug.
If not: PCB control defective.
Paper Transport Functions, No Printout
 Is the paper feed flap correctly engaged on both sides?
 Are all connectors for printhead plugged in?
 Is the unit operating with a strongly depleted battery?
If yes: Plug in power plug.
If no: The PCB Control defective or printhead defective.