– 9 –
TAPE DECK SECTION
0 dB=0.775 V
1. The adjustments should be performed in the order given in the
service manual. (As a general rule. Playback circuit adjust-
ment should be completed before performing recording cir-
cuit adjustment.)
2. The adjustments should be performed for both L-ch and R-ch
unless otherwise indicated.
•
Switch and control position
FUNCTION switch ............................. TAPE (RADIO OFF)
BALANCE control ............................. center click
MEGA BASS control ......................... mechanical center
BALANCE control ............................. center click
PRESET MODE switch ...................... MANUAL
VOLUME control ............................... maximum
Standard Output Level
Test Tape
Tape Speed Adjustment
Procedure:
Mode: FWD/REV playback (DECK A)
FWD playback (DECK B)
1. Set playback mode (normal speed).
2. Make sure that the value indicated on the frequency counter
falls into the specification.
3. If out of specification, adjust RV303 so that the value on the
frequency counter becomes 3 kHz.
Specifications: 2,985 to 3,015 Hz
4. Adjust so that the frequency at the beginning and that at the
end of tape winding are between 2,970 and 3,030 Hz.
5. Set high speed dubbing mode.
6. Confirm so that the value on the frequency counter is between
5,300 and 6,300 Hz.
7. Confirm frequency difference the beginning and the end of
the tape should be within 1%.
Adjustment Location: MAIN board (See page 11)
SECTION 5
ELECTRICAL ADJUSTMENTS
SP Out
Phones
Load impedance
6
Ω
32
Ω
Output level
0.775 V (0 dB)
0.25 V (–10 dB)
Type
Signal
Used for
WS-48B
3 kHz, 0 dB
Tape speed adjustment
+
–
set
32
Ω
frequency
counter
PHONES jack (J301)
test tape
WS-48B
(3kHz, 0 dB)
DECK-A
DECK-B
SECTION 4
MECHANICAL ADJUSTMENTS
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head
pinch rollers
playback head
rubber belts
erase head
idlers
capstan
2. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head demagnetizer close to the erase
head)
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 A
DECK B
Mode
Torque Meter
Meter Reading
Playback
CQ-102C
30 – 75 g•cm
(0.42 – 1.04 oz•inch)
Back tension
CQ-102C
1.5 – 6.0 g•cm
(0.021 – 0.083 oz•inch)
Rewind
Deck-A: More than 60 g•cm
CQ-201B
(More than 0.84 oz•inch)
Fast forward
Deck B: More than 50 g•cm
(More than 0.70 oz•inch)
Tension Meter
Meter Reading
CQ-403A
Deck-A: More than 90 g (3.18 oz)
Deck-B: More than 100 g (3.53 oz)
DECK A
DECK B
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