OKIDATA ML393C Plus, Руководство по обслуживанию

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Service Guide ML393/ML393CPlus
Chapter 3 Maintenance
3.2.06 Control Board (LQEM)
1. Remove the upper cover assembly (3.2.04 ) .
2. Remove the ribbon cartridge.
3. Release the lock of connector CN10 (1) and detach the operator panel cable (2).
4. Remove the five shield cover mounting screws (3).
5. While slightly lifting the shield cover (4), detach connector CN13 (5) from the control board (6), then
remove the shield cover.
6. Detach the remaining connectors from the control board.
7. Loosen the mounting screw and remove the control board.
NOTES:
Installation
Do not allow cables to get caught under the control board.
Insert the control board into the groove in the base tray (7).
Place the board into the groove (8) in the shield cover, then attach the shield cover.
When replacing the main control board, be sure to remove any socketed PROMS and EEPROMS.
Replacement printed circuit boards are shipped WITHOUT these items.
This board has a 2.0 Amp, 125V fuse.
If SP1 is OPEN, an Internal ROM is present. If SP1 is SHORTED - External ROM
SP3 must be OPEN for a Monochrome Model. It must be SHORTED for a Color Model.
CAUTION:
When removing PROMs and EEPROMs, you MUST follow standard Electrostatic Sensitive Device (ESD)
safety precautions or you may damage the components.
P/N 55050411 PCB: Main (LQEM-1) Black RSPL B.2.03
P/N 55050412 PCB: Main (LQEM-2) Color RSPL B.2.04
P/N 56619201 Cord: I/F Main PCB Connection (50 Pin) RSPL B.2.03
P/N 55938501 IC: EEPROM BR93CS46-2-NW RSPL B.2.04
P/N 56301703 Fuse: 2A, 125V B.2.04