Sony HCD-H51 - Mechanical Adjustments; Torque & Driving Force Measurement; Electrical Adjustments; Deck Section Servicing Notes

SECTION 4
MECHANICAL
ADJUSTMENTS
PRECAUTION
1,
Clean
the
following
parts
with
a
denatured
alcohol-
moistened
swab:
record/playback
head
pinch
roller
erase
head
rubber
belt
capstan
idler
2,
Demagnetize
the
record/playback
head
with
a
head
demagnetizer.
*,
(Head
demagnetizer
do
not
approach
for
the.
erase
head.)
3.
Do
not
use-a
magnetized
screwdriver
for the
adjustment.
4.
After
the
adjustments,
apply
suitable
locking
compound
to
the
parts
adjusted.
5,
The.
adjustment
should
be.
performed
with
the
rated
SECTION 5
ELECTRICAL
ADJUSTMENTS
* Servicing Note
1.
Connect
short
plug
to
TP201
before
electric
adjustment.
2,
After
DECK
electric
adjustment,
disconnect
a
TP201.
Note:
1.
The
adjustment
should
be
performed
in
the
publication,
(Be
sure
to
make
playback
adjustment
at
first.)
2,
The
adjustment
and
measurement
should
be
performed
for
both
L-CH
and
R-CH.
Switch position
TAPE
switch
($503)
:
TAPE
DOLBY
NR
switch
(S371)
:
OFF
GEQ
Volume
(RV601)
:12kHz
MAX
power
supply
voltage
unless
otherwise
noted.
(RV602-604)
:
EXCEPT
12kHz
CENTER:
*
Torque
Measurement
*
Test
Tape
Torque
Torque
meter
Meter
reading
Torque
Torque
meter
Meter
reading
=
35
to
60g+cm
Sigs
=
Pe
f
Forward
CQ-102C
(0.49
to
0.8902
«
inch)
P-4-A100
10kH,
~
10dB
|
Head
Azimuth
Adjustment
Forward
Soi
2
to
45g
-om
P-4-1300
|
315Hz,
OdB
|
Level
Adjustment
back
tension
(0.028
to
0.06302
+
inch)
WS-48B
3kHz,
0dB
Tape
Speed
Adjustment
FF/REW
CQ-201B
£0.
19
B06
+
cm
—
(0.98 to 2.1oz + inch)
«
Tape
Driving
Force
Measurement.
Mode al Torque meter
Meter reading
FWD CQ- 403A
More tham 110g (3.102)
Record/Playback
Head
Azimuth
Adjustment
DECKB
Procedure:
1. Playback Mode
test tape
P-4-A100
(10kHz,
~
1008)
IMM:
ue
R-CH
TP202 PB terminal