Read Sony CFD-D505 / CFS-E14L Service Manual online
– 5 –
• Standard output level
Output Pin
Speaker (L, R)
PHONES
Signal source impedance
3.2
Ω
32
Ω
Output signal level
0.775 V
0.245 V
(0 dB)
(–10 dB)
0 dB=0.775 V
TAPE RECORDER SECTION
• Test Tape
Type
Signal
Used for
WS-48A
3 kHz, 0 dB
tape speed adjustment
Tape Speed Adjustment
Procedure:
Mode: playback
Mode: playback
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head
demagentizer. (Do not bring the head demagnetizer close to the
erase head.)
erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
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.
Tape Tension Measurement
Meter
Meter Reading
CQ-403A
more than 70 g (2.46 oz)
Torque Measurement
Torque
Meter Reading
Torque Meter
Forward
22.5-55 g•cm
CQ-102C
(0.31-0.76 oz•inch)
Fast Forward and
45-120 g•cm
Rewind
(0.63-1.67 oz•inch)
CQ-201B
Back Tension
2-5g•cm
CQ-102C
(0.03-0.07 oz•inch)
32
Ω
test tape
WS-48A
(3 kHz, 0dB)
WS-48A
(3 kHz, 0dB)
set
phones jack
speed checker
LFM-30 or
digital frequency
counter
LFM-30 or
digital frequency
counter
+
–
Adjustment Value:
Speed checker
Digital frequency counter
–1.3 to 0.6%
2,990 ± 30 Hz
Frequency difference between the beginning and the end of the tape
should be within 1.5% (45 Hz).
should be within 1.5% (45 Hz).
Adjustment Location:
M901
adjusting variable resistor
3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION
1. Adjustments should be performed in the order given.
Generally playback circuit adjustments should be completed
before performing recording circuit adjustments.
before performing recording circuit adjustments.
2. Adjustments should be performed for both L-ch and R-ch.
Control should be set as follows unless otherwise specified.
• Position of control knob
TONE ........................................................................... maximum
• Standard recording position
Adjust the VOLUME knob so that the following regulated input/
output signal levels are obtained.
output signal levels are obtained.
• Standard input level
Input Pin
MIC
Signal source impedance
300
Ω
Input signal level
2.5 mV (–50 dB)
Frequency
1 kHz
SECTION 3
ADJUSTMENTS
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