11. Through the above steps, confirm that there occur no2.4.3 A/CTL head height & azimuth
wrinkling and damage in the tape around the pinch roller
1. Connect the jig connector cable to CN25 on the MAIN
and TU guide pole whenever the deck is in operation of
board.
Loading/Unloading, Search Rewind and at mode change
2. Connect the channel-1 scope probe to the audio output
from Search Rewind to play mode. If wrinkling or dam-
and connect the channel-2 scope probe to PB CTL.
age in the tape occurs around the TU guide pole, adjust
3. Playback the alignment tape.
the angle (slant) of the A/C head to the tape. So that the
4. Set the tracking to its center range by pressing the (+)
tape normally runs along the lower flange of the guide
and (�) tracking controls simultaneously.
pole.
5. Adjust screws A , B and C approximately 45 degrees
in the same direction to obtain maximum audio output
and CTL signal levels.
Pole base (SUP)Pole base (TU)6. As a final fine adjustment, adjust screw B for minimum
(Guide roller)(Guide roller)signal level fluctuation and screw C for maximum out-
put signal level.
TU guide
pole
TensionPinchA/C head Screw C
poleroller
Screw A
Screw B
Fig. 2-4-4 Tape transport systemFig. 2-4-5 A/C head
Audio
signal
Control
pulse
signal
Fig. 2-4-6 Audio and CTL signal
2-8 |
ACEC
