PCC D3400 - Page 333

Table 8..:2
Troubleshooting Procedure Chart (Continued)
PROBLEM PROBABLE CAUSE RECOMMENDED REPAIR
11. Positioner seeks to
1.
Positioner improperly 1. Refer to Paragraph 6.7 In manual, Positioner Servo Calibration.
wrong track adjusted on Servo
PCBA.
location.
2. Address logic on Logic PCBA
2.
Replace Logic PCBA.
does not count track location
correctly.
12. Heads crash. 1. Dirty heads
and/or dirty disk
1.
Clean heads and disk surfaces. Refer to Paragraph 6.4.1 In manual,
surfaces. Cleaning the Heads, and
Paragraph 6.4.2, Cleaning the Fixed Disk. If
heads cannot be cleaned, replace heads. If disk surfaces cannot be
cleaned, replace disk .
.
13.
Emergency unload 1.
Defective RUN / STOP
1.
If logic level at U447-Sls high, replace RUN/STOP pushbutton.
caused by speed pushbutton.
out-of-tolerance
OJ
error.
2. Defective Logic PCBA.
2.
If logic level at U447-Sls low, and logic level at U38S-11 Is low, replace
I
00
LoglcPCBA.
If logic level at U447-Sls low, and U38S-11 Is high, and TP24 Is also
high, replace Logic
PCBA.
3. Defective Servo PCBA.
3.
If U447-S Is low, U38S-11 Is high, TP24 is low, and TP22 Is high,
replace the Servo
PCBA.
4. Defective Drive Motor and/or
4.
If U447-S Is low, U38S-11 Is high, TP24 Is low, and TP22 Is low, and the
Motor Control PCBA.
drive belt is not binding, replace Motor Control PCBA. If problem
persists, replace Drive Motor.
If the drive belt binds, readjust it (refer to Paragraph 6.19 In manual).
14.
Emergency unload
1.
Plug P205 on Servo PCBA.
1.
Check
if P205 Is properly connected to J205.
caused by head
loading error.
2. Defective flex strip on
2.
Replace flex strip.
positioner.
3.
Defective Logic PCBA.
3.
Press RUN/STOP pushbutton. If logic level at U364-15 on Logic PCBA
Is
low. replace Logic PCBA. If logic level at U364-15 does not go high
within 25 seconds afte'r pressing RUN/STOP pushbutton. replace Logic
PCBA.
4. Positioner binding.
4. Free the binding positioner.