IBM 5280 Manual page 180

B
1
C DRIVE MAP
1
MIN CONF SYS
PAGE 2 OF 6
005
- Measure
for the correct
voltage at the
Diskette
Connector
<l'1H1
453).
AC
AC
Is the AC voltage present at the
Diskette AC Connector?
Y N
006
GO TO MAP SOOO,
ENTRY POINT A.
007
Defective AC Drive
(Diskette MIM 351).
- - - - - OR
Motor
- Defective AC Motor Starting
Capacitor (Diskette MIM 353).
008
- Measure +5, -5 and +24 Vdc for
voltage and ripple at
the
Diskette Drive Control card (MIM
313, 461 and 463) •
Are all of the measurements within
. tolerence?
Y N
009
GO TO MAP 8000, ENTRY POINT A.
010
Is a 'Ros Patch' cable connected
to the Base Diskette MPU 'Ros
Patch' Signal Cable Connector
(A-Cl) (MIM 303)?
Y N
4
D E
E
MAP 2.270-2
011
(ENTRY POINT B)
Due to the lack of swappable
FRUs, it is suggested at this
time the following be replaced
one at a time to determine the
failing FRU or isolate the
problem.
1. VFO card (A-D3).
2. Diskette Drive Control
(Diskette MIM 377).
card
3. Cable between the Diskette/Main
MPU card and the Diskette Drive
Control card (MIM 313).
4. DiSkette/Main MPU card (A-C1)
(MIM 303).
Does the diskette drive still
fail?
Y N
I
012
I
- End of
call.
Run 'SYSTEST'
before returning the system to
I
the Customer.
013
Load a good scratch Diskette 1
into the failing drive.
Probe TPE03 (31SD) or TPEOI
(51TD)
'+
Index' on the failing
Diskette Drive Control card
.(Djskettet-lIM 331).
Up light: Pulses
Down light: On
Are the lights. correct?
Y N
3 3
F G
ECS40S74
MAP 2270-2