COMPUTERCRAFT - 162 & 601 POST Error

162 & 601 POST Error

PURPOSE:
TO PROVIDE A REPLACEMENT DISKETTE DRIVE TO CORRECT A PROBLEM WITH THE HEAD POSITIONING LEADSCREW BINDING, WHICH CAUSES 162/601 ERRORS DURING POST (POWER-ON SYSTEM TEST).

Machines Affected
8580 8570 8565 8555 8550

PHYSICAL CHECK:
ONLY DISKETTE DRIVES "MANUFACTURED FOR IBM CORPORATION," WITH A "YD" AS THE FIRST CHARACTERS OF THE TOP LINE OF PRINT ON THE IDENTIFICATION LABEL, AND A REVISION CODE OF C01, C02 AND C03 ARE AFFECTED BY THIS PROBLEM.
THE AFFECTED DRIVES MAY BE IDENTIFIED BY REFERRING TO THE LAST NUMBER IN THE BOTTOM LINE OF PRINT OF THE LABEL IDENTIFIED IN THE FOLLOWING DIAGRAM:
TOP VIEW OF DISKETTE DRIVE ASSEMBLY

  ________________
  |3.5" DISKETTE |                   ENLARGED VIEW OF LABEL
  |     DRIVE    |               ________________________________
  |              |               |YD -XXX XXXX      VARIOUS     |
  |  HEAD        |               | DATE CODE     AGENCY SYMBOLS |
  |  MOTOR       |               |                              |
  |  ___|__      |               |MANUFACTURED FOR   DC12V. DC5V|
  |  |    |------|               |IBM CORPORATION               |
  |__|____|______| <--LABEL <----|P/N XXXXXXX  EC XXXXXX REV C01|
                     LOCATION    |______________________________|

DETAIL:
UNDER CERTAIN CONDITIONS, THE HEAD LEADSCREW ASSEMBLY MAY BIND, CAUSING DISKETTE DRIVE ERRORS.

AFTER POWER-ON, OR WARM BOOT, IF THE MACHINE SHOWS 162 AND 601 ERRORS, CHECK THE DISKETTE DRIVE FOR THE CONDITIONS LISTED UNDER "PHYSICAL CHECK" ABOVE.

ONLY REVISION LEVELS C01, C02 AND C03 ARE AFFECTED BY THIS CONDITION. ALL OTHER LEVELS OF DISKETTE DRIVES MANUFACTURED FOR IBM ARE UNAFFECTED.

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