Caple C871i Instrukcja Użytkownika Pobierz pdf (Strona 270)

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Apple II Computer Info

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### Created : Friday, September 27, 1996 Modified: Friday, September 27, 1996

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From: "[email protected]" <[email protected]>

Newsgroups: comp.sys.apple2

Subject: Apple //e Manual Fault Dict.

Date: Wed, 18 Sep 1996 21:21:06 -0500

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Apple //e Manual Fault Dictionary:

How to use this chart:

Switch on your Apple //e with no disk in any drives. Get out your logic

probe, and test the pins on each chip and note their reading. Then check

your list with the list below and compare them. Any inconsistencies

could signal a faulty chip and should be tested and/or replaced.

PIN # 1 2 3 4

CHIP 1234567890123456789012345678901234567890

----------------------------------------------------

LS125 PPPLPPLHPHPPLH

PLA PPPPPPHPHLLPPPPPPPPH

FF HHLPHPPLPPHPPPHH

Buffer LPPPPPPPPLPPPPPPPPLH

LS245 LPPPPPPPPLPPPPPPPPPH

LS374 PPPPPPPPPLPPPPPPPPPH

LS244 LPPPPPPLPLPPPPLPLPLH

Vid ROM PPPPPLPPLPPH

MMU LPPPPPPPPPPPPPHHHPHPPLPPHPPPPPPPPPPPPPPP

Processor LHPHOHPHPPPPPPPPPPPLLLLPPPPPPPPPPPOOPHPH

Apple II Computer Technical Information : Apple II Family Hardware Info

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