3. REPAIR
3-1. Major Replacement Parts (and Notes on Disassembling / Reassembling)
MX870 TABLE OF CONTENTS
Service
part
Est.
time
required
(min.)
Recommended removal procedure
*1
/
Notes on replacement
*2
Adjustment / settings
Operation
check
Logic
board
ass'y
15 (1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit
(4) Scanner unit
(5) Main case
(6) Rear cover
(7) Logic board ass'y
- Before removal of the logic board ass'y,
remove the power cord, and allow for
approx. 1 minute (for discharge of
capacitor's accumulated charges), to prevent
damages to the logic board ass'y.
- Before replacement, check the ink absorber
counter value (by service test print or
EEPROM information print).
After replacement:
1. Initialize the EEPROM.
2. Set the ink absorber counter value.
3. Set the destination in the EEPROM.
4. Correct the automatic print head
alignment sensor.
5. Check the ink system function.
6. Perform LF / Eject correction (only
when streaks or uneven printing
occurs).
7. Perform button and LCD test.
Perform 1 to 7 in the service mode.
[See 4-2. Service Mode, for details.]
8. Perform print head alignment in the
user mode.
9. Set the language displayed on the LCD
in the user mode.
- EEPROM
information
print
- Service test
print
- Printing via
USB
connection
- Copying
- Direct
printing
from a
digital
camera
(PictBridge)
Absorber
kit
15 (1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit
(4) Scanner unit
(5) Main case
(6) Rear cover
(7) Print unit
(8) Ink absorber
- See 3-2. Part Replacement Procedures, (3)
Printer unit removal & Ink absorber
replacement, for details.
After replacement:
1. Reset the ink absorber counter.
[See 4-2. Service Mode, for details.]
- Ink absorber
counter value
print (After
the ink
absorber
counter is
reset, the
counter value
is printed
automatically
Carriage
unit
20 (1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit
(4) Scanner unit
(5) Main case
(6) Rear cover
(7) Timing slit strap
(8) Carriage rail
(9) Carriage unit
- Before removal of the carriage rail, put a
mark of the carriage rail position.
- Keep the timing slit strap (carriage encoder
film) free from stain or damage. When
returning the strap, make sure of its
orientation (left and right, front and back).
- See 3-2. Part Replacement Procedures, (7)
Carriage unit removal, for details.
At replacement:
1. Apply grease to the sliding portions of
the carriage rail.
[See 4-4. Grease Application, for
details.]
2. Check the ink system function.
[See 4-2. Service Mode, for details.]
3. Perform print head alignment in the
user mode.
- Service test
print
(Confirm ink
system
function.)
Switch
system
unit
30 (1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit
At replacement:
1. Adjust the paper feed motor.
[See 4-5. Special Notes on Servicing,
- EEPROM
information
print
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