Toshiba M-V19H01, Service Manual

Page: 114 / 166

Alignments and Adjustments (Mechanical)
5-2
Fig. 5-3
5-2 Adjustments
5-2-1 Preadjustment
1. When parts are replaced, the tape ran sport
system may be changed. When many
different parts are replaced, refer to the
procedures for the tape transport system.
To begin run a E-120 tape and make sure that
excessive tape wrinkle does not occur at each
of the tape guides.
2. If tape wrinkle occurs at the S, T-guide rollers,
turn the S, T-guide rollers until the tape
wrinkle disappears.
3. If tape wrinkle still occurs at the tape guide,
adjust the tilt of A/C head.
4. A/C head adjustment locations
5-2-2 Adjustments
5-2-2(A) A/C HEAD HEIGHT ADJUSTMENT
1. Run a standard tape.
2. Check the surface of audio head using a
dental mirror.
3. Turn the screws (A), (B), (C) clockwise or
counterclockwise so that the gap of the lower
tape edge and the lower edge of the control
head is 0.25mm. (See Fig, -5, 5-5)
Test Points : EYM01-CTL (control waveform)
EYM03-H’D SW (head switching sync)
EYM05-EnV (envelope waveform)
EYM04-A.OUT (audio output)
Test Tape : Color bar (1 KHz)
Lion pattern(7 KHz)
Fig. 5-4 Location of A/C Head Adjustment Screw
Fig. 5-5 A/C Head Height Adjustment