— 4 —
SECTION 2
MECHANICAL ADJUSTMENTS
SECTION 3
ELECTRICAL ADJUSTMENTS
PRECAUTION
1.
Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head
pinch roller
erase head
rubber belts
capstan
idlers
2.
Demagnetize the record/playback head with a head
demagnetizer.
3.
Do not use a magnetized screwdriver for the adjustments.
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.
• Torque Measurement
• Tape Tension Measurement
DECK SECTION
0 dB=0.775V
1.
Demagnetize the record/playback head with a head
demagnetizer. (Do not bring the head demagnetizer close to
the erase head.)
2.
Do not use a magnetized screwdriver for the adjustments.
3.
After the adjustments, apply suitable locking compound to the
parts adjust.
4.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5.
The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)
6.
The adjustments should be performed for both L-CH and R-
ch.
7.
Switches and controls should be set as follows unless otherwise
specified.
8.
Set to test mode. (Press key switch same time
SPECTRUM ANALYZER ENTER/NEXT and
EFFECT ON/OFF button.)
•
Test Tape
Record/Playback Head Azimuth Adjustment
DECK A
DECK B
Note :
Perform this adjustments for both decks. Remove the covers
of cassette holders.
Procedure:
1.
Mode: Playback (FWD)
Mode
Torque Meter
Meter Reading
Forward
CQ-102C
36 to 61g•cm
(0.50 – 0.84 oz•inch)
Forward
CQ-102C
2 to 6g•cm
Back Tension
(0.026 – 0.082 oz•inch)
Reverse
CQ-102RC
36 to 61g•cm
(0.50 – 0.84 oz•inch)
Reverse
CQ-102RC
2 to 6g•cm
Back Tension
(0.026 – 0.082 oz•inch)
FF, REW
CQ-201B
61 to 143g•cm
(0.85 – 1.98 oz•inch)
Mode
Tension Meter
Meter Reading
Forward
CQ-403A
more than 100 g (3.53 oz)
Reverse
CQ-403R
more than 100 g (3.53 oz)
Tape
Signal
Used for
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
WS-48B
3 kHz, 0dB
Tape Speed Adjustment
P-4-L300
315 Hz, 0dB
Level Adjustment
set
rear panel
VIDEO1
AUDIO OUT connector
(L: L-CH)
(R: R-CH)
+
–
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
