SECTION 3SECTION 4
MECHANICAL ADJUSTMENTSELECTRICAL ADJUSTMENTS
PrecautionDECK SECTION0 dB=0.775V
1. Clean the following parts with a denatured alcohol-moistened
swab:1. Demagnetize the record/playback head with a head
record/playback headpinch rollersdemagnetizer.
erase headrubber belts2. Do not use a magnetized screwdriver for the adjustments.
capstanidlers3. After the adjustments, apply suitable locking compound to the
2. Demagnetize the record/playback head with a headparts adjusted.
demagnetizer.4. The adjustments should be performed with the rated power
3. Do not use a magnetized screwdriver for the adjustments.supply voltage unless otherwise noted.
4. After the adjustments, apply suitable locking compound to the5. The adjustments should be performed in the order given in this
parts adjusted.service manual. (As a general rule, playback circuit adjustment
5. The adjustments should be performed with the rshould be completed before performing recording circuitated power
supply voltage unless otherwise noted.adjustment.)
6. The adjustments should be performed for both L-CH and R-
Torque MeasurementCH.
TorqueTorque meterMeter readingTapeSignalUsed for
40 to 70 g Y cmP-4-A10010 kHz, �10 dBAzimuth Adjustment
FWDCQ-102C
(0.56 - 0.97 oz Y inch)WS-48B3 kHz, 0 dBTape Speed Adjustment
FWD1 to 5 g Y cm
CQ-102C
back tension(0.01 - 0.07 oz Y inch)Record/Playback Head Azimuth Adjustment
55 to 140 g Y cm(Deck A, Deck B)
FF/REWCQ-201B
(0.76 - 1.94 oz Y inch)
Note: Perform this adjustments for both decks.
Procedure:
1. Mode : Playback
test tape
P-4-A100
(10kHz, �10dB)
level meter
SPEAKER
terminal (JK703)
set
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 2 dB of peak.
L-CH
peakoutput
levelwithin
2dBwithin 2dB
R-CH
peak
screw
position
screw
L-CHR-CHposition
peakpeak
N 10 N |
ACEC
SONY
