IBM 5110 Series Maintenance Analysis Procedures page 87

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DISKETTE READ MAP
PAGE 17 OF 27
180
-Open the cover and remove the diskette.
- Turn the spindle pulley.
Does the drive hub turn?
Y N
181
Replace the drive assembly.
182
- Remove the diskette cover and check the
collet assembly (see 5114 MIM 111 and 113).
Are the collet components free of wear
and assembled correctly?
Y N
183
Replace the worn or broken parts.
Assemble the collet and cover assemblies.
184
-Check the cover latch assembly (see 5114
MIM 112).
Is the latch functioning properly?
Y N
185
Replace the bad components.
186
Replace the drive assembly.
187
- Turn on the IPO switch.
Does the diskette turn?
Y N
B
W
188
Check for a loose pulley or a bind in the
spindle assembly.
Replace the drive assembly if no failures are
found.
8
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MAP 0310-17
189
(Entry Point F)
On the drive control card, Probe:
TPB-9 (+Index)
TPA-13 (gnd)
(See LOGIC 440)
Is the down light on and the up light pulsing?
Y N
190
-Perform the PTX/LED alignment (See 5114
MIM 161).
Is the PTX/LED alignment OK?
Y N
191
Bad PTX/ LED.
192
Perform the LED and PTX service checks for
the failing drive (see 5114 MIM 162).
Is the LED service check OK?
Y N
193
Bad LED.
Bad drive control card.
194
Is the PTX service check OK?
Y N
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X y
195
Bad PTX assembly.
Bad drive control card.
01JAN79
EC 836600 PEC 835541
MAP 0310-17