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AST RESEARCH, INC., TECHNICAL BULLETIN #TB-0389 03-01-88
TURBOLASER/PS EL/LPC UPGRADE KIT
PART NUMBER 500477-001
PROBLEM DESCRIPTION
The original Video Cable PN 220260-001 supplied with the
TurboLaser/PS Printer connecting the PostScript board to the
Ricoh Engine Video board contains a plastic plug in pin #5. This
plug mates with the clipped pin on J-4 of the Postscript board.
This plug interferes with the re-installation of the cable to J-2
of the new Interface Mux board J-2 connector. J-2 does not have
pin #5 clipped.
SOLUTION
Simply remove the plug from pin #5 of the Video Cable. The plug
can easily be removed with pen knife or sharp pin.
CAUTION
There are NO clipped pins on any Interface Mux board connectors.
All cables that are to be inserted into this board should be
examined for the presence of any plugs. These plugs should be
removed before attempting to insert into the Mux connectors.
Failure to remove these plugs will result in damage to the
connector pins.
UNDER NO CONDITIONS, SHOULD ANY PIN ON THE INTERFACE MUX BOARD BE
CLIPPED OR BENT TO FACILITATE THE INSTALLATION OF CABLES
NOTE: An additional Video Cable PN 220055-001 will be supplied
with all kits assembled after March 1, 1988. Instructions for
installation will be included with the modified kits.
Refer to FIGURE 1 Page 2 for PostScript/EL cabling.
NOTE: As a protion of the data is in pictorial form, it is not
included here. To botain a complete copy of this technical bulletin,
contact:
AST RESEARCH, INC.
2121 Alton Avenue
Irvine, California 92714-4992
Attention: Product Suport
(Technical Bulletin)
FIGURE 1 - AST TubboLaser/PS and EL Upgrade Configuration
NOTES:
1. All cables have Pin #1 orientated towards the right. (Colored Stripe)
2. There are no clipped pins on the MUX Board.
3. All cables should be examined for plugs before inserting into
connectors of the MUX Board
4. Power connector plugs should be inserted with the yellow wires to the
right.
5. PostScript J-3 connector: (Communication Selector)
* -Some boards have a 4 position connector:
Use Rotary Switch PN 220261-002
* -Some boards have a 5 position connector:
Use Rotary Switch PN 220261-001
6. PostScript board Dip Switch settings.
Switch 1=ON = A4 paper size
Switch 1=OFF = Letter paper size
Switches 2 through 6 are not used
Switches 7 8
OFF OFF = 1200 Baud
OFF ON = 9600 Baud
ON OFF = Parallel Port
ON ON = Apple Talk
To use switches 7 and 8, the Rotary Communications Selector Switch
must be in Position #0, or disconnected frorm the PostScript board.
7. Jumper E-3 on the Interface Mux board must be connected if the LPC
is of the older type identified by Part Number 202093-001 or-301.
Printer output in LPC Mode will be inhibited unless this jumper is
connected.
Reference:
AST TurboLaser PostScript Option Installation Supplement PN 000621-001A
AST TurboLaser EL LPC Option Installation Supplement PN 000622-001A