[PageStream 2 document F0306.DOC: 8.50 x 11.00 in, 501 objects]

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SECTION SIX
DIAGNOSTIC FLOWCHARTS

Start

Connect Terminal
To RS232 Port
And Cycle Power

No

Display
Readable?

Yes

No

Display On
Terminal?

Error
Message?

No

Yes

Yes

B

No

Diagnostic
Error?

Replace Parts
Per Diagnostic
Guide

Run All Tests

Yes

C

Replace Parts
Per Diagnostic
Guide

Cycle Power

Yes

Error?

No

Restart

Done

No

Other?

Yes

A

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No Error on Diagnostic

A

Won't Load
Disk?

Yes

Run Disk
Diagnostic Or
Replace Disk

No

Video
Problem?

Yes

Trace Signal
From Video
Shifter To
Output

No

Problem
Found?

No

Run Appropriate
Test Continuously

Yes

Contact ATARI
Tech Support

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No Display on Monitor or Terminal

B

No

+5V
Present?

Yes

Replace
Power
Supply

No

+5V
Shorted To
Ground?

Replace
Oscillator

No

16 MHz
Clock
Present?

Yes

Yes

Inspect Main
PCB For
Shorted +5V

MC68030
Halted?

Yes

No

No

Found
Short?

Yes

Replace
COMBO

Replace COMBO
Or MC68030

No

Replace
Main
PCB

Remove Short
And Recheck

RS232
Display?

Yes

No

See Theory Of
Operation, Call
Tech Support,
Or Replace Main
PCB

Diagnostic
Error?

Yes

No

C

Replace Parts
Per Diagnostic
Guide

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No Display
No Error

C

16 MHz
Clock
Present

No

Replace The
Crystal

Yes

Restart

Ouput From
VIDEL IC?

No

Replace VIDEL IC

Yes

Trace Output
To Connector,
Replace Failing
Component

OK?

Yes

Restart

No

Replace
COMBO IC