IBM System/34 Maintenance Manual page 311

27-290
CARRIAGE BED ORIENT
SERVICE CHECK
1. Remove power and the 72MD unit (see paragraph
27-200).
2.
3.
4.
5.
Set Power to I (operator panel).
Disconnect connector J1
0
from the driver board.
Visually align I/O slot 1 with the drive diskette
guide.
Locate the picker carriage assembly
0
near the
picker carriage detent assembly
G.
6. Power on by connecting J 1 • to the driver board.
7.
8.
9.
Insert the adjusting tool (part 2462583 for old style
picker, part 2462612 for new style picker) into the
drive diskette guide and carefully put downward
pressure to the top of the tool. (This will align the
tool to the drive diskette guide.
Check for the following conditions:
a. Check that the right wall of I/O slot 1 and the
right side of the tool touch.
b. Check that the carriage bed does not move
when the tool is inserted or that the ,tool must
not be forced into the I/O slot.
If both conditions are not correct, perform the
carriage bed orient adjustment (see paragraph
27-295).
10. If both conditions are correct, reinstall the 72MD
unit (see paragraph 27-200).
I
27-295 CARRIAGE BED ORIENT ADJUSTMENT
1. Remove power and the 72M D unit (see paragraph
27-200). Do not connect the AC power connector
o
to the drive motor or connector J1 • to the
driver board.
2.
3.
4.
5.
6.
7.
8.
Set Power to I (operator panel).
DANGER
Voltage is still present at the power connector
when it is disconnected and power is on.
Visually align I/O slot 1 with the drive diskette
guide.
Loosen the three screws
e
that fasten the
carriage stepper motor
G)
to the motor plate.
Locate the picker carriage assembly
0
near the
picker carriage detent assembly
G.
Connect J 1 • to the driver board.
Insert the adjusting tool (part 2462583 for old'style
picker, part 2462612 for new style picker) into the
drive diskette guide and carefully put downward
pressure to the top of the tool. (This will align the
tool to the drive diskette guide.)
Turn the stepper motor clockwise by hand until the
right wall of I/O slot 1 and the right side of the
tool touch.
9. Tighten the three screws
e.
10. Perform the carriage bed orient switch adjustment
(see paragraph 27-265).
11. Visually check the magazine interlock/indicator. If
the indicator slot is not centered on the 1 in the
I/O positions, perform the magazine
interlock/indicator adjustment (see paragraph
27-280).
12. Remove power and reinstall the 72MD unit (see
paragraph 27 -200).
26 27-290
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