Troubleshooting; Control Rom And Pcb Replacement - AMT Datasouth Accel-7350 Service Manual

Troubleshooting

Control ROM and PCB Replacement

When an EEPROM error or sensor problem arises, if there is no mechanical problem and if the
control ROM on the PCB is not the latest version, then replace the control ROM with the latest
version.
After you have replaced the control ROM, perform EEPROM initialization routines 1 and 2. After the
initialization routines, conduct a self-test to check print quality. If the problem is not solved by the
replacement of the control ROM, replace the control PCB and perform EEPROM initialization
routine 3.
Initialization of EEPROM
(1) Initialization Routine 1
Initializes the entire panel data settings stored in the EEPROM. To start the routine,
simultaneously hold down the [HIGH IMPACT] and [LF] keys and turn on the power.
(2) Initialization Routine 2
Learns the following sensor information and stores it in the EEPROM:
• Thresholds of the right/left edge sensors
• Threshold of the manual feed paper sensor
• Reference pulse for skew detection
When performing this routine, be sure to remove paper from the printing station and place 15
inch paper on the rear tractor (do not feed it in). To start the routine, simultaneously hold down
the [SPEED] and [TEAR OFF] keys and turn on the power.
(3) Initialization Routine 3
Initializes all of the data in the EEPROM. Routine 3 = Routine 1 + Routine 2 + Clearing of print
position adjustment data, head gap adjustment data, and paper feed position adjustment data.
When performing this routine, be sure to remove paper from the printing station and place 15
inch paper on the rear tractor (but do not feed it in). To start the routine, simultaneously hold
down the [ONLINE] and [EJECT/LOAD] keys and turn on the power. After you have performed
initialization routine 3, be sure to adjust the print position, the head gap, and the paper feed
position.
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