IBM 5280 Manual page 147

B
2
DISKETTE MAP
DISKETTE ENTRY MAP
PAGE 3 OF
9
002
- Remove all diskette(s) from the
drives attached to this system.
- Attempt to 'IPL' the system
~5i~g n~~g~~stic Di5kett~
1.
- Do Not attempt to 'IPL' the
failing drive.
- If the system cannot be 'IPLed',
leave the diskette in the
failing drive with the locking
lever closed and the condition
codes displayed.
Can the system be IPL'ed from any
drive?
Y N
6
003
Probe the lines in the table.
See MIM 905 For Probe setup.
Line Name
----------------
4F Clk Phase
2
4F Clk Phase
1
4 MHz clock
250 Hz clock
2.25·MHz clock
1 MHz clock
9 MHz clock
6 MHz clock
13 MHz clock
200 KHz clock
41.66 Hz clock
400 Hz clock
100 Hz clock
1
KHz clock
Up light: On
Down light: On
Probe
-------
A-C2DIO
A-C2D13
A-C5B05
A-C6D02
A-C7B09
A-C7D02
A-C7D04
A-CSB02
A-CSB03
A-CSB05
A-CSB09
A-CSB12
A-C3D07
A-CSDIO
Are the lights correct?
Y N
C D E
D E
MAP 2000-3
004
Is only the Down Light on?
Y N
I
(105
- The card listed across from
the failing line is the
defective card.
Line Name Card
4F Clk Phase
2
A-D3
4F Clk Phase
1
A-D3
- All other clock lines,
Defective Diskette/Main MPU
card (A-Cl) (MII'1 303).
006
The failing clock line
grounded.
See MIM 531 for cards in
net that could cause
; s
the
this
fai lure. If the line is not
listed,
- Defective Diskette/Main MPU
card (A-CI) (MIM 303).
007
- Insert the Diagnostic Diskette
1
into the failing drive and close
the locking lever.
- See
MIM
931 for an explanation
of the condition codes.
Are the condition codes displayed?
Y N
4
F
OOS
GO TO MAP 0100, ENTRY POINT A.
ECS40S74
f>1AP 2000-3