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5.5 REPLACEMENT PROCEDURES
5.5.1 Cabinet
1. Turn off power and remove the cabinet lid.
2. Loosen 4 screws located in each corner of the cabinet.
3. Raise the input tray and then lift off the cabinet.
5.5.2 Main PCB
1. Record all FUNCT 92 and 93 parameters so the new PCB can be configured correctly. If replacing a DP7
PCB, installing serial EEPROM U11 from the old PCB in the new PCB will transfer all parameters.
2. Remove the cabinet (see 5.5.1).
3. Remove the 2 screws in the PCB upper corners or, if the PCB has button fasteners, pry each upper corner
free and fold the PCB down.
4. Disconnect the following cables (see Assy Dwg #72080 for DP6 or #72115 for DP7):
DP6
DP7
Description
J1
J1
input power
J2
J2
carriage stepper motor
J3
J3
document stepper motor
J4
J4&5
printhead
J5
J6
carriage home & document sensors
J6
J7
interface
J7
J8
keypad/display
5. Raise the PCB and remove the hinge screw in each lower corner.
6. To replace the PCB, reverse the procedure in steps 3 to 5.
7. Reconfigure the new PCB with the FUNCT 92 and 93 parameters recorded in step 1 and the FUNCT 94
parameters listed on the configuration label.
5.5.3 Battery
1. Record all 92 and 93 FUNCT parameters.
2. Turn off power and remove the cabinet (see 5.5.1).
3. Remove the 2 screws in the PCB upper corners or, if the PCB has button fasteners, pry each upper corner
free and fold the PCB down.
4. Remove the old battery from its holder and discard it in a way that won't expose it to flame or high
temperature.
5. Install a new #68026 Lithium battery in the holder with the "+" terminal facing away from the PCB. Replace
only with the same or equivalent type.
CAUTION: Danger of Explosion if battery is incorrectly replaced !
6. Remount the PCB and cabinet.
7. When the printer is powered on, POWER FAILURE will be displayed. Press FUNCT and reenter the 92 and
93 FUNCT parameters recorded in step 1 and the FUNCT 94 parameters listed on the configuration label.
5.5.4 Keypad/Display Assembly
1. Remove the cabinet (see 5.5.1).
2. Remove the 2 screws in the PCB upper corners or, if the PCB has button fasteners, pry each upper corner
free and fold the PCB down.
3. Disconnect the Keypad/Display cable from J7 of the Main PCB.
4. Remove the 5 screws fastening the metal box top to the box.
5. Remove the 4 screws fastening the keypad/display to the box top and remove the keypad/display.
6. To install a new keypad/display reverse the procedure in steps 1 to 5
5.5.5 AC board
1. Turn off power and unplug the AC Cord.
2. Facing the rear of the printer remove the screw on the right end of the AC cord receptacle and the screw to
the left of the power switch.
3. Slide out the AC PCB and disconnect the transformer connector.
4. To install a new AC PCB reverse the procedure in steps 1 to 3.