– 10 –
4-2. ELECTRICAL ADJUSTMENTS
DECK SECTION
1. The adjustment should be performed in the publication.
(Be sure to make playback adjustment at first.)
2. The adjustment and measurement should be performed for
both L-CH and R-CH.
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Switch position
DOLBY NR switch : OFF
TIMER switch : OFF
DIRECTION MODE switch : A
3. Deck section electrical adjustment are made in test mode by
pressing TUNER/BAND, DISPLAY, and FUNCTION at the
same time.
– Record Mode –
set
MD OUT
Level meter
+
–
MD IN
AF OSC
attenuator
600
Ω
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Test Tape
Tape Contents Use
P-4-A 100 10 kHz, –10dB Head Azimuth Adjustment
P-4-L300 315Hz, 0dB Level Adjustment
WS-48B 3kHz, 0dB Tape Speed Adjustment
0dB=0.775V
Record/Playback Head Azimuth Adjustment
DECK A DECK B
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Setup for adjustment
When adjusting the azimuth remove, the Window (DIS) in the
center of the front panel. (Refer to page 8.)
Procedure :
1. Forward Playback mode
Reverse Playback mode
set
MD OUT
+
-
test tape
P-4-A100
(10kHz, – 10dB)
Level mete
SECTION 4
ADJUSTMENTS
4-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head rubber belts
capstan
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 sup-
ply voltage unless otherwise noted.
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Torque Measurement
Mode Torque Meter Meter Reading
Forward CQ-102C
36 to 61g•cm
(0.50 – 0.84 oz•inch)
Forward
Back Tension
CQ-102C
2 to 6g•cm
(0.026 – 0.082 oz•inch)
Reverse CQ-102RC
36 to 61g•cm
(0.50 – 0.84 oz•inch)
Reverse
Back Tension
CQ-102RC
2 to 6g•cm
(0.026 – 0.082 oz•inch)
FF, REW CQ-201B
61 to 143g•cm
(0.85 – 1.98 oz•inch)
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Tape Tension Measurement
Mode Torque Meter Meter Reading
Forward CQ-403A more than 100g (3.53 oz)
Reverse CQ-403R more than 100g (3.53 oz)
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