Sony TC-KA6ES Service Manual page 9

Standerd adjustment tape
P-4-A100
(10kHz, —10dB)
L-CH 47kQ Oscilloscope
R-CH
LINE OUT
Oscilloscope Lissajous' Figures
QODO@OO
in-phase 45° 99° 135° 180°
a
good No good
Note: The heads should be adjusted only when the erase head
is replaced.
1. Mount the mirror cassette and set the equipment to playback
State.
2. (Azimuth adjustments) Adjust screws @ or @ so that the
tape runs as parallel to the erase heads as possible.
Loi A)
ay
Normal
Tighten @
and loosen @.
Tighten @
and loosen @.
(Erase head
viewed in the
mirror cassette)
3. (Height adjustment) Rotate screws ©, @ and @ in the
same angle so that the widths of erase heads seen in the
upper and lower sides of the tape become essentially the
same. If the width in the upper or lower side is larger,
tighten or loosen the screws, respectively.
Erase head (viewed in the mirror cassette)
oo
Tape —»
eS
Adjust to the same widths.
4. (Adjustments of tilting) Adjust back tension to 0 still in
playback state and check that there is no snaking in the
erase heads and pinch roller guide in the S side. If there is,
change tilting by rotating the screw ©. When the tape
moves up or down in the mirror tape, tighten or loosen the
screw, respectively.
5. Repeat the adjustments again from 2. and converge the
height and tilting to more suitable values. And, check that
there are no tape curls in the pinch roller guide and the
guide of the record/playback heads.
6. (Adjustments of thrust) Slightly loosen the screw © and
finely adjust it so that the tape smoothly runs over the entire
surfaces of the heads by adjusting the thrust of the erase
heads to an optimum value relalive to the tape.
About 0.5mm
——a phil Sans
N | as
one heads |
Record/playback
heads
Too shallow Too deep
1. Check that the tape smoothly runs over the entire tape pass
without curling or snaking.
2. After the adjustments, apply the locking compound to the
screws adjusted (apply the compound to the screw © only
after the final azimuth adjustments are completed).
Adjustment Location:
The following views relate to those in the mirror cassette
(upper) and MD viewed from your side (lower).
Pinch roller in
the S side Erase Record/playback
heads heads
Pinch roller in
the T side
Torque Adjustment
1. Load the torque measuring tape CQ-102C, and play back.
Adjust RV801 so that the torque meter reading is 40 + 5g
cm. (0.556 + 0.069 oz « inch)
2. After adjustment, measure back tension and FF/REW torque,
and make sure that measured data satisfies the specification.
35 — 45gecm (0.49 — 0.62 oz * inch)
FWD back
CQ-102C
| 7 — 11gecm (0.10 — 0.15 oz ¢ inch)
FF/REW CQ-201B 65 — 90gecm (0.91 — 1.25 oz » inch)