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10.22 Replacing the disk drive
i Remember to remove any inserted floppy disks from the disk
drive before removal.
Procedure:
1.
Disconnect the power supply cables (1) and the data line (2).
2.
Remove the four fastening screws (3) of the disk-drive holder.
3.
Take the disk drive complete with holder out of the unit.
4.
Unscrew the four fastening screws (4) at the side.
5.
Take out the faulty disk drive.
6.
Insert the new disk drive and secure it with the four fixing bolts
(4) at the side.
7.
Firmly secure the plastic holder and disk drive using the
fastening screws (3).
8.
Perform a function test of the drive (Sec. 5.9).
10.23 Replacing the TFT display
i In order to remove the TFT display without problem, you must
first remove the exhaust-gas analyzer module.
Procedure:
1.
Pull the foil cable (1) of the TFT display out of receptacle X17
on the control module PCB.
2.
Pull the foil cable (2) of the membrane keypad out of X13 on
the control module PCB.
3.
Pull the cable of the receiver diode (3) off connector X12 on
the control module PCB.
4.
Remove the cable (4) for the power supply to the bulb of the
TFT display from the control module PCB.
5.
Unscrew the four fixing bolts (5) of the front panel in the
interior of the unit.
6.
Remove the front panel (6).
7.
Unscrew the two fastening screws (7) (at the top and
bottom) of the holder panel (8) for the TFT display.
8.
Remove the four fastening screws (9) from the holder panel
(8) of the TFT display.
9.
Remove the holder panel (8).
10. Install the new TFT display by proceeding in the reverse
sequence to removal.
! Ensure that the TFT display is installed in exactly the right
position.
11. Route the cables through the holes in the housing and re-
insert them in the control module PCB.
12. Install the front panel.
13. Perform a function test of the TFT display (Sec. 5.14 - 5.17).
10.24 Replacing the membrane keypad
i In order to remove the membrane keypad without problem,
you must first remove the exhaust-gas analyzer module.
The membrane keypad is fixed in the front panel with adhe-
sive. You must therefore replace the front panel complete
with membrane keypad.
1.
Pull the foil cable (1) of the TFT display out of receptacle
X 17 on the control module PCB.
2.
Pull the foil cable (2) of the membrane keypad out of X13 on
the control module PCB.
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