Head-Arm Assembly; Head-Arm Assembly Adjustment - IBM 2310 Maintenance Manual

b. Adjust front and rear crash stops according
to section 4. 10.
c. Adjust home switch according to section
7.11.2.
7.15 HEAD-ARM ASSEMBLY
7. 15. 1 Head-Arm Assembly Adjustment
NOTE: The requirements for aligning read/write
heads by using track 100 of the OE cartridge to
obtain the oscilloscope display patterns Figure 4-8,
Section 4. 17. 1 are identical for machines with serial
numbers 00001 through 00050.
The location of the head adjustment screw, which is
accessible from inside the voice coil (Figure 7-7)
requires that the drive magnet be removed to gain
access to this screw.
Procedures for adjustment of the head-arm
assembly are as follows:
1.
Remove drive magnet from the actuator accord-
ing to procedures of section 7.6. 1 to gain access
to the head adjusting screws.
Present 0.200" _ _ -.!
Clamping Screw
Head 1
2.
Torque both head clamping screws to 3.5 (±1. 0)
pound-inches.
3. Back off the head adjusting screws and push
each head-arm assembly back toward the voice
coil until the head load spring just clears the
potted capsule on the head. A dental mirror
is required to observe the lower head.
4. Install the CE cartridge and apply power to the
machine to load heads. Manually move the
carriage to track 100 and detent by energizing
the even detent coil.
NOTE: Operate the CE Step Mode switch to ener-
gize the even detent coil. Ensure that carriage is
still positioned at CE track 100 when detent engages
rack.
5. Allow the machine and cartridge to operate
continuously for 15 minutes to ensure that
temperature stabilization has taken place be-
fore adjusting heads.
6. Scope from Pin D3B07. Set time base to dis-
play 5 ms/ cm (one revolution of the disk is
40 ms). Synchronize the oscilloscope on
Negative Reference, Pin K2B04.
(Approx)
Head Positioned
to Read on CE
Track 100
Voice Coil
Head Adjust
Screw (2)
Carriage
Detent located at Track 100
Figure 7-7. Head Arm Assembly Adjustment
7.12