5-4-(2). Adjustmentofp4 Post - Panasonic REV-1 Service Manual

(7) Keep pressing the tracking up/down
(A
or v)
bu~ons on the remote controller unit. The output
envelope should vary nearly parallel with other
condition as shown in Fig. M9.
(8) Set the tracking control into center fix position by
pressing the tracking up/down
(A
and v) simul-
taneously and adjust for maximum RF envelope,
whilst being as flat as possible.
Output
envelope Mini.
I_
+
~
Output envelope Max.
(Fix position)
Good
Good
Fig. M9
P2
Po
Fig. M1O Loading of Posts
5-4-(2). ADJUSTMENT OF P4 POST
(1)
(2)
(3)
(4)
(5)
(6)
Install A/C Head on the Mechanism Chassis by
one screw.
Playback the Alignment Tape.
Rotate the screw (A) or (B) until the wrinkle ap-
pears on the lower edge of tape at P4 Post.
Rotate the screw (A) or (B) until the wrinkle just
disappears on the lower edge of tape at P4 Post.
Connect the oscilloscope to audio output termi-
nal.
Rotate the screw (C) until audio signal is maxi-
mized.
NOTE: 1. The relation between the rotation direc-
tion of screws (A) and (B) and the condi-
tion of wrinkle on the lower edge at P4
Post as shown in Fig. Ml 1.
2. Make sure that there is not the inclined
wrinkle between P4 Post and Pinch
Roller.
SCREW (A) SCREW (B)
So wrinkle
appears on the
COUNTER
lower edge of tape
CLOCKWISE CLOCKWISE
So wrinkle
disappears on the
lower edge of tape
CLOCKWISE :~#-&:sE
, ,
1
I
Fig. Ml 1
27