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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
L-CH
peak
within
1dB
within
—t
screw position
position
L-
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