Sony TC-WR665S - ADJUSTMENT PROCEDURES; Mechanical Adjustments; Electrical Adjustments

SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1.
Clean
the
following
parts
with
a
denatured
alcohol-moistened
swab:
record/playback/erase head
rubber belts
idlers
2.
Demagnetize
the
record/playback
head
with
a
head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustment.
4.
After
the
adjustments,
apply
suitable
locking
compound
to
the
parts adjusted.
5.The
adjustments
should
be
performed
with
the
rated
power
supply voltage unless otherwise noted.
pinch roller
capstan
Torque Measurement
Meter reading
30 to 65g «cm
CQ-102C
(0.42
to
0.9
oz
*
inch)
DECK A: 1 to 6g * cm
(0.014 to 0.083 oz * inch)
CQ-102C
DECK B : 2 to 9g * cm
(0.03 to 0.12 oz * inch)
30 to 65g * cm
Reverse
back
CQ-102RC
(0.014
to
0.083
oz
*
inch)
70 to 120g*cm
FF/REW
CQ-201B
(0.98
to
1.66
ozeinch)
tension
3-2. ELECTRICAL ADJUSTMENTS
Forward
back
tension
1 to 6g *cm
PRECAUTION
1. The adjustment should be performed in the publication.
(Be sure to male playback adjustment at first.)
2. The adjustments and measurement should be performed for both
L-CH and R-CH.
® Switch position
DOLBY NR switch : OFF
DIR MODE switch —
@ Standard record position :
Deliver the standard input signal level to input jack and set the
REC
LEVEL
control
to
obtain
the
standard
output
signal
level
as follows.
— Record Mode —
AF OSC
a,
fe)
attenuator 10k Q
LINE OUT
LINE IN
Standard Input Level
Input terminal LINE IN
input signal level 0.5V ( — 3.8dB)
Standard Output Level
Output terminal LINE OUT
output signal level 0.5V ( — 3.8dB)
Test Tape
P-4-A100
P-4-L300
WS-48B
Test Mode
1. Insert a short-circuit plug into TP801 (2P) and turn ON the
power switch.
At
first,
all
the
fluorescent
tubes
light
up,
then
the
system
returns
to normal display. (However, “0000” is not displayed on the
counter.)
2. To release the test mode, remove the short plug and turn off the
power switch.
3. Remove the short plug after completion of adjustment.
10kHz, — 10dB
315Hz, 0dB
3kHz, 0dB
Azimuth Adjustment
PB Level Adjustment
Tape Speed Adjustment
Record/Playback Head Azimuth Adjustment
Procedure :
1. Forward playback Mode
test tape
P-4-A100
(10kHz, — 10qB)
VIVM
LINE OUT
2.
Turn
the
adjustment
screw
for the
maximum
output
levels.
If
these
levels
do
not
match,
turn
the
adjustment
screw
until
both
of
output
levels
match
together
within
1dB.
L-CH
peak
within
1dB within
—t screw position
position L-