Section 4 - Alignment Check; 4.1 Introduction; 4.2 Equipment Needed; Transport Alignment Check - MCi JH-110 Series User Manual

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SECTION 4
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ALIGNMENT CHECK
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4.1 Introduction
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4
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4.2 Equipment Needed
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4.3 Transport Alignment Check
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4.4 Audio Alignment Check
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Page 4-1
Observe the performance of the tape transport,
checking the items below. If the transport appears
to be out of alignment or malfunctioning, refer to
the JH-110B Technical Manual or consult your
authorized MCI dealer.
This section contains a quick check out of the
transport ' s alignment. It is suggested that the
heads be cleaned and demagnetized and the
alignment checked prior to each recording ses ­
sion. If the transport cannot be adjusted to meet
specifications, consult the technical manual or
your authorized MCI dealer. A complete alignment
should be performed whenever the maintenance
requires the replacement or repairing of com ­
ponents.
erform the alignment check in the prescribed
order. If adjustments cannot be made, consult the
maintenance section of the technical manual.
1. Lo d roll of t pe. Press FWD and allow appox-
im tely h lf the t pe to spool onto the t ke up
reel. Shuttle the tape back nd forth sever l times.
Observe the t pe p th.
2. Press PLAY nd observe the t pe p th nd
speed.
ull the capstan pinch roller away from the
capstan. The tape speed should not change.
3. Press STOP. The t pe should not creep in the
stop mode.
If the transport appears to be working properly,
continue with the audio alignment check. If any
problems are suspected, refer to the Technical
Manual.
The tape should NOT:
Rub against the reel flanges
Crinkle or scallop at the edges
Skew up or down when the lifters move out
Leave the surface of the dancer arm.
The tape should:
Be centered on the heads
Spool evenly onto the reels
Change direction smoothly.
The following is a list of the minimum equipment
necessary for an alignment check:
Head Demagnetizer
Cotton Tipped Swabs
Isopropyl Alcohol or equivalent head cleaner
MRL Reproduce Alignment Tape (Elevated
level, 250 nWb/m)
Bulk Erased Tape
Audio Signal Generator Krohn-Hite Model
5800
Oscilloscope hillips Model 3232 (2 mv/cm
vertical sensitivty, 10 MHz Bandwidth, 0.2
msec/cm Horizontal sweep)