Head Cleaning; Cleaning With Cleaning Disk - Sony MP-F17W Service Manual

d. Connect the CH-l and CH-2 probes of
oscilloscope to TP-2 of IF Board 52/53 and
TP-3 of MFD Function' Checker II. The
osciloscope is triggered by CH-2.
e. Move the head to TRK40.
f. Check if the phase relation
at
both sides
between the INDEX signal and output signal
meets the specification (400I.lSec) as shown in
Fig. '-3 (b).
5-3-3 Adjustment
a. If the phase relation described above does
not meet the specification. adjust Hall IC
Ass'y so that output signals are located in
zone L as shown in Fig.
'-3
(b) with an
Index Adj. Lever.
INDEX
puIs e
a
Side
RF
Signal
1
Side
RF
signal
II
300 "sec
500
"sec
200 "sec
•
II
~I
L
.......
.. ;
..•......
400 "sec
(b)
F;g.
5·3
Index Phase Adjustment
5-4 HEAD CLEANI NG
5-.... 1 Tools and Meawring Equipmeat
a. Cleaning Disk (OR -D29W A)
b. MID Function Checker II
c. Fixture-l0
5-.... 2 Cleaning with Cleaning Disk
a. Connect the drive to the MID Function
Checker II. (Refer to Fig. 2-14)
b. Move the head until it arrives at an unused
track of the cleaning disk.
c. Set the cleaning disk in plac e and hold it for
about 10 seconds.
cleaning disk.
Thereafter. eject the
Note: Do not use any scratched cleaning disk.
Do not reuse any used track because
reuse of the track weakens the cleaning
effect on the head.
Note: Cross out numbers of the used tracks on
a ~leaning disk label. as shown in the
example for avoiding reusage.
Cleaning Disk
Check Column
~ X Y<.
03 04 05 Ob
07 08 09
10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29
30 31 32 33 34 35 36 3; 38 39
40 41 42 43 44 45 46 47 48 49
50 51 52 53 54 55 56 57 58 59
60 61
62
63 64 65 66 67 68 69
70 71
72
73 74 75 76
77
78 79
OR-029WA