Epson 890N Service Manual - Page 75

C524MAIN Board Removal 3, Lead the lead wires as shown below

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EPSON FX-890/2190 5. Remove the 2 CBS (M3x12) screws securing the COVER,CONNECTOR,UPPER or the optional Type-B I/F Board to the I/F GROUNDING PLATE. (See Figure 4-10) 6. Remove the 6 CBP (M3x12) screws securing the C524MAIN Board to the lower case. 7. Lift the rear side of the I/F GROUNDING PLATE slightly and remove the I/F GROUNDING PLATE together with the C524MAIN board. 8. Remove the 3 CP (M3x4) screws securing the I/F GROUNDING PLATE to the C524MAIN board. Then remove the I/F GROUNDING PLATE. Lead the lead wires as shown below: CBP Screws (3x12) x6 Tightening Torque: 0.9±0.1 N.m GUIDE,I/F,BOARD I/F GROUNDING PLATE C524MAIN Board Revision B GROUND PLATE, I/F, UPPER CP Screws (3x4) x3 Tightening Torque : 0.48±0.1 N.m CBP Screws (3x12) x2 Tightening Torque: 0.9±0.1 N.m A D JU S TM E N T R E Q U IR E D Once the C524MAIN Board has been replaced, be sure to make the following adjustments with the adjustment program. Refer to "Adjustment Program" on page -97. : • Bi-D Adjustment • EEPROM Writing • USB-ID Input • Firmware Reloading COVER, CONNECTOR,UPPER C524MainB_R01.eps Figure 4-10. C524MAIN Board Removal 3 Disassembly and Assembly Main Components Disassembly 75

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EPSON FX-890/2190
Revision B
Disassembly and Assembly
Main Components Disassembly
75
5.
Remove the 2 CBS (M3x12) screws securing the COVER,CONNECTOR,UPPER
or the optional Type-B I/F Board to the I/F GROUNDING PLATE.
(See Figure
4-10)
6.
Remove the 6 CBP (M3x12) screws securing the C524MAIN Board to the lower
case.
7.
Lift the rear side of the I/F GROUNDING PLATE slightly and remove the I/F
GROUNDING PLATE together with the C524MAIN board.
8.
Remove the 3 CP (M3x4) screws securing the I/F GROUNDING PLATE to the
C524MAIN board. Then remove the I/F GROUNDING PLATE.
Figure 4-10.
C524MAIN Board Removal 3
Lead the lead wires as shown below:
A
D
J
U
S
T
M
E
N
T
R
E
Q
U
I
R
E
D
Once the C524MAIN Board has been replaced, be sure to make
the following adjustments with the adjustment program.
Refer to
“Adjustment Program” on page -97.
:
• Bi-D Adjustment
• EEPROM Writing
• USB-ID Input
• Firmware Reloading
C524MainB_R01.eps
COVER, CONNECTOR,UPPER
GROUND PLATE, I/F, UPPER
CBP Screws (3x12) x6
Tightening Torque: 0.9±0.1 N.m
C524MAIN Board
GUIDE,I/F,BOARD
I/F GROUNDING PLATE
CP Screws (3x4) x3
Tightening Torque
: 0.48±0.1 N.m
CBP Screws (3x12) x2
Tightening Torque: 0.9±0.1 N.m