ENSONIQ ASR-10 Wartungshandbuch PDF herunterladen (Seite 45)

Revlacina

ASR-1

O/88 Modules

Removing

Replacing the Digital Board

Remove all cables connected to the ASR-10, including the power cord.

Turn the unit upside-down and remove all the screws from the base and rear panel.

Using a scribe, disconnect the following cables from the main board:

JlO

34-pin ribbon cable to the disk drive,

6-pin cable to the wheel and patch select board,

20-pin ribbon cable to the keyboard,

34-pin ribbon cable to the analog board,

20-pin ribbon cable to the digital jack board,

f) Jl

24-pin ribbon cable to the keypad/display board,

7-pin cable to the power supply board,

If SCSI is installed, and

If Digital I/O is installed.

Remove the eight (8) screws from the main board:

Four (4) from main board to keyboard bracket,

One (1) from center support bracket,

One (1) from digital PCB bracket, and

Two SEMs (screws with star washers) from digital heatsink to keyboard

bracket heatsink.

Installing

ASR-8%On the ASR-88 there are two brackets connecting the digital board to

the rear of the keyboard. The digital board is attached to these brackets by two

plastic stand-offs. Slide the digital board towards the back of the unit to release

the stand-offs from the bracket. Remove the stand-offs from the digital board

and place them on the new board.

Make sure the insulator is in place under the board.

Install the eight screws into the digital board (see 4 a-d).

Reconnect all the cables to the digital board (see 3 a-i).

If there are expansion SIMMs installed:

Remove SIMMs from removed board (see Installing and removing SIMMs),

Make sure that the jumper is in the expansion location, and

Install the SIMMs into the new board.

Power on and test the unit.

10. Replace all the screws in the bottom plate and rear panel.

ASR Service Manual

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ENSONIQ ASR-10 Wartungshandbuch Seite 45