NOTE:3.3.4 A/C head height & azimuth
To prevent the tape from damage, turn the guide rollersRemove the exterior parts attached to the UPPER CASE
slowly.ASSEMBLY so that the screws around the A/C HEAD
(7) By operating the tracking button (both in + and - directions)ASSEMBLY can be tighten or loosen.
in the manual tracking mode, vary the output level of the? LOWER CASE ASSEMBLY
FM waveform from maximum to minimum and vice versa to? TOP OPE UNIT
confirm that the waveform varies nearly in a flat shape.? CASE COVER(S),(M) ASSEMBLY
(8) When the FM waveform breaks in the level varying process,? UPPER CASE (S),(M) ASSEMBLY
subtly adjust the height of guide rollers at every breaking? FRONT FRAME ASSEMBLY
point so that the waveform varies as flat as possible.
NOTE:
Repeat the above steps 6. and 7. several times to confirm
In performing adjustment, it is recommended that LOWER
that the waveform is flat as a whole.
CASE ASSEMBLY and TOP OPE UNIT are attached to the
(9) Playback the SP stairstep signal of alighment tape and ad-
main body for better operation and safety.
just the tracking control to maximize the FM waveform,
(1) Remove the Cover (JIG) shown on Fig.3-4-1.
confirm that FM waveform variation is always flat.
(2) Connect the JIG CONNECTOR CABLE to CN25 on the
(10) Record the signal and play it back in both of the SP and EP
MAIN BOARD ASSEMBLY.
modes, and confirm that the FM waveform is flat in both
(3) Connect the channel-1 scope probe to the audio output
modes.
(AO_SIG_J) and connect the channel-2 scope probe to PB
NOTE:CTL.
Among the above-mentioned adjustment steps, the(4) Playback the alignment tape.
items of No.9 and No.10 are needed for the EP model(5) Set the tracking to its center range by pressing the (+) and
only.(-) tracking controls simultaneously.
(6) Adjust screws A , B and C approximately 45 degrees in the
same direction to obtain maximum audio output and CTL
CH-2
signal levels.
1 field(7) As a final fine adjustment, adjust screw B for minimum sig-
nal level fluctuation and screw C for maximum output sig-
nal level.
FLATTEN WAVEFORM.
CAUSER BY WRONG HEIGHT
CAUSED BY WRONG HEIGHT
OF SUPPLY GUIDE ROLLER
OF TAKE-UP GUIDE ROLLERA/C HEAD
SCREW C
Fig.3-3-5
CORRECT VARIATION OF WAVEFORM
SCREW A
SCREW B
BAD VARIATION OF WAVEFORM
Fig.3-3-7
Fig.3-3-6
(11) Through the above steps, confirm that there occur no wrin-
kling and damage in the tape around the PINCH ROLLER
and TU GUIDE POLE whenever the deck is in operation ofAudio
Loading/Unloading, Search Rewind and at mode changesignal
from Search Rewind to play mode. If wrinkling or damage
in the tape occurs around the TU GUIDE POLE, adjust the
angle (slant) of the A/C HEAD to the tape. So that the tape
Control
normally runs along the lower flange of the GUIDE POLE.
pulse
signal
Fig.3-3-8
1-22 (No.86721) |
ACEC
