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Atari Technical Bulletin
Number: TT30-0003
Date: March 24, 1992
Page 1 of 2


Product(s) Affected:	TT030
Model:		All
Type of ATB:	As Needed
ECO #: 		N/A

Reason for ATB:

To correct improper jumper setting causing coprocessor to run at 16MHz instead of 32MHz.


Notes:

Four FAB assemblies are affected by this ATB. They sre marked as follows:

FAB Number	REV

C301763-001	D
C301763-001	B1
C302406-001	A


Symptoms of Problem:

Applications needing coprocessor support run slow.

Solution:

1.	Remove the top cover. If the TOS ROMs are located on the left front side of the main PCB, remove the VME card guide.

2.	Check jumper setting at W101.

	For FAB C301763-001 REV D and C302406-001 REV A see Figure 1 on page 2.

	For FAB C301763-001 REV B1 see Figure 2 on page 2.

	Be sure the jumper is parked across pins 1 and 2.

3.	Re-assemble unit.

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[46 drawing objects, see TT300003.DOC.p002.svg]

Atari Technical Bulletin
Number: TT30-0003
Date: March 24, 1992
Page 2 of 2

U210

U204

C191

R990

3

R992

R993

R991

1

R960

R962

W101

Figure 1

W101

1

3

C116

U101

C114

U605

Figure 2