SECTION 4SECTION 5
MECHANICAL ADJUSTMENTSELECTRICAL ADJUSTMENTS
PRECAUTIONDECK SECTION0dB=0.775V
1. Clean the following parts with a denatured-alcohol-moistened
1. Demagnetize the record/playback head with a head
swab:
demagnetizer. (Do not bring the head demagnetizer close to
record/playback headpinch roller
the erase head.)
erase headrubber belts
2. Do not use a magnetized screwdriver for the adjustments.
capstanidlers
3. After the adjustments, apply suitable locking compound to the
2. Demagnetize the record/playback head with a head
parts adjust.
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 the
5. 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 rated power
should be completed before performing recording circuit
supply voltage unless otherwise noted.
adjustment.)
6. The adjustments should be performed for both L-CH and R-
Y Torque Measurement
CH.
ModeTorque MeterMeter Reading7. Switches and controls should be set as follows unless otherwise
36 to 61gácmspecified.
ForwardCQ-102C
(0.50 � 0.84 ozáinch)8. Set to test mode. (Press key switch same time GROOVE
Forward2 to 6gácmENTER/NEXT and DISC 4 button.)
CQ-102C
Back Tension(0.026 � 0.082 ozáinch)
Y Test Tape
36 to 61gácm
ReverseCQ-102RC
(0.50 � 0.84 ozáinch)
TapeSignalUsed for
Reverse2 to 6gácm
CQ-102RCP-4-A10010kHz, �10 dBAzimuth Adjustment
Back Tension(0.026 � 0.082 ozáinch)
WS-48B3kHz, 0dBTape Speed Adjustment
61 to 143gácm
FF, REWCQ-201BP-4-L300315Hz, 0dBLevel Adjustment
(0.85 � 1.98 ozáinch)
Record/Playback Head Azimuth Adjustment
Y Tape Tension Measurement
DECK ADECK B
ModeTension MeterMeter Reading
Note: Perform this adjustments for both decks
ForwardCQ-403Amore than 100g (3.52 oz)
ReverseCQ-403Rmore than 100g (3.52 oz)
Procedure:
1. Mode: Playback (FWD)
test tapemain board
P-4-A100CN207
(10KHz, �10dB)Pin 1 (L-CH)
Pin 3 (R-CH)level meter
set
+
�
main board
CN207
Pin 2
N 20 N |