Sony CFD-101 Service Manual ▷ View online
– 11 –
2-5. CD BLOCK
2-6. POWER BOARD
3
POWER board
2
BVTP 3x10
1
BVTP 3x10
1
BVTP 3x10
2
CD block
– 12 –
2-7. KNOB (TU) SETTING
A
1
Turn the CV1 fully in the direction of arrow.
2
knob (TU)
(Part
A
is located as shown figure.)
3
B2.6x6
– 13 –
4-1. TAPE RECORDER SECTION
• Standard Output Level
Output terminal
HP OUT
load impedance
32 Ω
output signal level
0.25 V (–10 dB)
• Test Tape
Type
Signal
Used for
WS-48A
3 kHz, 0 dB
tape speed adjustment
P-4-A063
6.3 kHz, –10 dB
head azimuth adjustment
SECTION 3
MECHANICAL 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.
(Do not bring the head magnetizer 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.
(Do not bring the head magnetizer 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
Mode
Torque Meter
Meter Reading
30–70 g • cm
FWD
CQ-102C
(0.42–0.97 oz • inch)
FWD
CQ-102C
1.5–5.5 g • cm
Back Tension
(0.021-0.076 oz • inch)
more than 60 g • cm
FF
CQ-201B
(more than 0.83 oz • inch)
more than 60 g • cm
REW
CQ-201B
(more than 0.83 oz • inch)
Tape Tension Measurement
Mode
Tension meter
Meter Reading
FWD
CQ-403A
more than 100 g
(more than 3.53 oz)
SECTION 4
ELECTRICAL ADJUSTMENTS
Tape Speed Adjustment
Procedure :
Mode: playback
Mode: playback
Adjustment Value :
Speed checker
Digital frequency counter
– 0.5 to + 0.5 %
2,985 to 3,015 Hz
speed checker
LFM-30
or
digital frequency
counter
LFM-30
or
digital frequency
counter
set
phones jack
32
Ω
test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
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:
TAPE
SPEED
ADJ
0 dB = 0.775 V
– 14 –
REC/PB Head Azimuth Adjustment
Procedure :
1. Mode : playback
1. Mode : playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
phones jack
2. Turn the adjustment screw for the maximum output levels. If these
levels do not match. Turn the adjustment screw until both of output
levels match together within 3 dB.
levels match together within 3 dB.
angle
within
3 dB
3 dB
L-CH
peak
peak
R-CH
peak
peak
within
3 dB
3 dB
Output
level
level
R-CH
peak
peak
screw
position
position
L-CH
peak
peak
3. Phase Check
Mode : playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
L-CH
set
R-CH
L-CH
32
32
Ω
oscilloscope
V
H
Screen pattern
in phase
45°
90°
180°
135°
good
wrong
Note :
Finish the screw adjustment with a turn in the clockwise
direction.
After the adjustment, lock the adjustment screw.
direction.
After the adjustment, lock the adjustment screw.
Adjustment Location : record/playback head
adjustment
screw
screw
set
32
Ω
phones jack
32
Ω
R-CH
level meter
Click on the first or last page to see other CFD-101 service manuals if exist.