TM 32-5835-001-24 & P
(4) Bring tips of demagnetizer to within approximately 0.125 inch (3.175 milli-
meters) of the audio head if possible, straddle the head gap, and draw the demag-
netizer tips up and down the length of the audio head three or four times.
(5) Remove demagnetizer slowly in a circular motion from the audio head to a
distance of 3 or 4 feet, allowing its ac field to diminish gradually. This slow removal
is extremely important.
Do not unplug demagnetizer while it is near the audio or erase
heads; the collapse of its magnetic field may demagnetize the
(6) Repeat steps (4) and (5) for the erase head.
(7) If necessary, repeat the process until total demagnetization is completed
in each case.
The erase head under certain conditions is susceptible to mag-
netization by spurious sources and can require demagnetization.
If capstan, tape guides, or other metal parts become magnetized,
a few passes of the demagnetizer along their lengths and the use
of the slow withdrawing technique should be adequate to complete
the demagnetization process for these items.
Maintenance Action Precise Symptom List.
Output voltage incorrect
Mode switch binding
Tape speed incorrect
Record /Reproduce circuit
No output; channel 1 or 2
Microphone circuit inoperative
Meter drive circuit
Meter not functioning; channel 1, channel 2, or both channels