Service manual
7020
SOLUTION:
CAUSE: One or more paper feed gears in the driving unit may be damaged.
SOLUTION: Closely inspect the drive unit while paper is feeding to determine the damaged
gear(s). Inspect the paper feed gear (p/n 26NA16310), paper feed coupling gear/B (p/n
26NA17490), and paper feed coupling gear/A (p/n 26NA17480). Replace parts as needed.
USAGE:
26
F28-4 code intermittently.DESCRIPTION: SOLUTION ID:
106899
SOLUTION:
CAUSE: System control firmware bug. The F28-4 code may intermittently occur if the TCSB, in the
drum carriage, detects toner (carrier adhesion) on the drum during initialization.
SOLUTION: Update firmware to a minimum of level 29 system and level 26 image.
Notes:
1. The F28-4 code detection has been abolished with the newer firmware. It has been determined
that carrier adhesion detection during initialization is not necessary.
2. The F28-4 code history recorded in the past will still remain.
3. Level 29 system and level 26 image have been installed in production 7020's with serial
number 26NE15735 and above.
USAGE:
25
FAILED TO WRITE TO LPT1 message is indicated on the PC when trying to flash the unit.DESCRIPTION: SOLUTION ID:
110680
SOLUTION:
CAUSE: The parallel port setting in the PC CMOS is not set to Standard (Normal) or Bi-Direct. It
may be set to either ECP or EPP, which will cause a corrupt flash process.
SOLUTION: Verify the parallel port setting and make any changes utilizing the CMOS Setup Utility
(refer to the motherboard manual for instructions). To verify the parallel port settings, perform the
following:
1. Right-click on My Computer.
2. Click on Properties.
3. Click on Device Manager tab.
4. Click on the [+] symbol to open Ports.
5. Double-click on Printer Port (LPT1) to view the type of port [Manufacturer:].
Note: The parallel port setting procedure differs in each PC. Normally, the parallel port setting is
selected in the BIOS settings mode. For details, please refer to the user's manual for the PC.
USAGE:
25
How to reset fuser failure codes (F34, F35, F36).DESCRIPTION: SOLUTION ID:
89202
SOLUTION:
To reset fuser failure codes, perform the following:
1. Access 25 mode (power OFF, hold the 2 and 5 keys, power ON).
2. Select option 1 [Software SW].
3. Use the scroll arrows to scroll to address 3-1.
4. Select OFF.
5. Power the machine OFF/ON.
USAGE:
24
DB409, intermittent J16 when feeding 8 1/2 x 11 from the LCT.DESCRIPTION: SOLUTION ID:
138174
SOLUTION:
PROBABLE CAUSES:
1. The wear within the paper feed unit (p/n 13HA-4000) causes the upper limit actuator to read
incorrectly. This places excessive pressure on the drive system. Replace the paper feed unit as
necessary.
2. Loosen the four DB409/410 drive unit (p/n 13NE-1500) mounting screws, push the drive unit
upwards and to the right to provide maximum gear mesh for the drive gear (p/n 13HA77060) and
idler gear (p/n 13HA77050). Retighten the four drive unit mounting screws.
3. Replace the DB409/410 paper feed connecting roller/3 (p/n 13HA40020), shaft holders front and
rear (p/n 26NA40820), and driving gear (p/n 13HA77060).
4. Inspect the DB409/410 drive unit paper feed coupling gear/B (p/n 26NA17490), paper feed
coupling gear/A (p/n 13HA77090), paper feed gear/2 assembly (p/n 26NA-1680), idler gear/F (p/n
13HA77080), and idler gear/D (p/n 13HA77050); replace worn gears as necessary.
5. Inspect the bushings (p/n 26NA30770) in the developer unit for binding, and replace as
necessary.
USAGE:
24
F46-8 and F46-11 at power up.DESCRIPTION: SOLUTION ID:
86803
SOLUTION:
CAUSE: Laser index error caused by the mirrors in the laser unit being fogged with condensation.
The initialization values were different from the internally calibrated values.
SOLUTION: Open up doors and panels. Allow copier to adjust to the room temperature where the
copier will be installed.
USAGE:
22
Code 46-08 shortly after a new installation.DESCRIPTION: SOLUTION ID:
95798
12
Copyright 2005, Konica Minolta Business Solutions U.S.A., Inc.
May 2005