Sony CFD-575 / CFD-577 Service Manual ▷ View online
– 5 –
Remote Commander (RMT-C575A)
FUNCTION
0/10
MODE
BAND
TUNE
10
POWER
CD/RADIO (AC ONLY)
1
2
3
4
5
6
7
8
9
VOL
+
–
1
2
3
4
5
6
7
8
1 FUNCTION button
2 MODE button
3 CD operation buttons
2 MODE button
3 CD operation buttons
(
PLAY button
= (FR) AMS/SERCH button
+ (FF) AMS/SERCH button
P
+ (FF) AMS/SERCH button
P
PAUSE button
0
REW button
)
FF button
p
STOP button
4 BAND button
5 POWER button
6 Numeric buttons
7 VOL +,– buttons
8 TUNE +, – buttons
5 POWER button
6 Numeric buttons
7 VOL +,– buttons
8 TUNE +, – buttons
– 6 –
SECTION 3
DISASSEMBLY
Note :
Follow the disassembly procedure in the numerical order given.
3-1. REAR CABINET REMOVAL
3-2. MAIN BOARD, CD BOARD, OPTICAL PICK-UP, CD MOTOR BOARD REMOVAL
r
The equipment can be removed using the following procedure.
Mechanism deck
TC board
Main block
Front cabinet
Optical pick-up
Rear cabinet
Power board
Battery (L) board, Battery (S) board, Battery (M) board
Main board
Lamp board
Switch board
CD board
Set
CD motor board
1
Screws (+BVTP 3x12)
5
8
2
Screws
(+BVTP 3x16)
4
Screws (+BVTP 3x12)
3
Screws
(+B 3x10)
Front cabinet
Rear cabinet
Main block
7
Screws (+BVTP 3x10)
6
Knob (GEQ)
8
1
Screws (+BVTP 3x10)
1
Screws (+BVTP 3x10)
3
Screws
(+BVTP 3x10)
3
Screws
(+BVTP 3x10)
5
Screws
(+PWH 2.6x10)
5
Screws
(+PWH 2.6x10)
6
4
2
CD board
CD chassis
Main board
Optical pick-up
CD motor board
7
Remove solder
– 7 –
3-3. LAMP BOARD, SW BOARD, MECHANISM DECK, TC BOARD REMOVAL
3-4. POWER BOARD, BATTERY (L) BOARD, BATTERY (S) BOARD, BATTERY (M) BOARD REMOVAL
5
Screws (+BVTP 3x10)
3
Screws (+BVTP 3x10)
3
Screws
(+BVTP 3x10)
1
Screws
(+BVTP 3x10)
7
Screws (+P 2x6)
8
Screws (+P 2x6)
6
4
2
9
Front cabinet
Mechanism deck
Bracket (B), MD
TC board
Switch board
Lamp
board
board
MD bracket
1
Screws (+BVTP 3x10)
2
4
3
3
5
6
Power board
Battery (L) board
Battery (S) board
Lid, Battery case
Battery (M) board
Rear cabinet
– 8 –
Tape Speed Adjustment
Procedure :
Mode : Playback
Adjustment Value :
Speed checker
Digital frequency counter
± 0.66%
2,980 – 3,020Hz
Frequency difference between the beginning and the end of the tape
should be within 1% (30Hz).
should be within 1% (30Hz).
Adjustment Location : MAIN board
Torque
Torque Meter
Meter Reading
Forward
CQ-102C
22.5 – 50 g•cm
(0.32 – 0.76 oz•inch)
Forward
CQ-102C
2 – 5 g•cm
Back Tension
(0.03 – 0.06 oz•inch)
Fast Forward
CQ-201B
60 – 120 g•cm
(0.84 – 1.67 oz•inch)
Rewind
CQ-201B
60 – 120 g•cm
(0.84 – 1.67 oz•inch)
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 demagne-
tizer. (Do not bring the head demagnetizer close to the erase
head.)
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.
Torque Measurement
Tape Tension Measurement
Mode
Tension Meter
Meter Reading
FWD
CQ-403A
more than 150g
(more than 5.30 oz)
set
test tape
WS-48A
(3kHz, 0dB)
WS-48A
(3kHz, 0dB)
32
Ω
speed checker
LFM-30 or
digital frequency
counter
LFM-30 or
digital frequency
counter
J302 (phones)
– +
RV300
Record/Playback Head Azimuth Adjustment
DECK A
DECK B
Procedure :
Mode : Playback
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 1dB.
of output levels match together within 1dB.
test tape
P-4-A063
(6.3kHz, –10dB)
P-4-A063
(6.3kHz, –10dB)
set
32
Ω
J302 (phones)
level meter
+
–
L-CH
peak
peak
R-CH
peak
peak
L-CH
peak
peak
R-CH
peak
peak
Screw
position
position
output
level
level
within
1 dB
1 dB
within
1 dB
1 dB
screw
angle
angle
4-2. ELECTRICAL ADJUSTMENTS
TAPE SECTION
1. The adjustments should be performed in the order given in the
service manual . (As a general rule playback circuit adjustment
should be completed befor performing recording circuit adjust-
ment.)
should be completed befor performing recording circuit adjust-
ment.)
2. The adjustments should be performed for both L-CH and R-CH
unless otherwise indicated.
• Switch location
FUNCTION
: TAPE
ROTARY EQUALIZER : center click
VOLUME
VOLUME
: MAX
MEGA BASS
: mechanical center
Standard Output Level
Output terminal
PHONES
SP OUT
load impedance
32
Ω
3.2
Ω
output signal level
0.25V (–10dB)
0.775V (0dB)
Test Tape
Type
Signal
Used for
WS-48A
3kHz, 0dB
Tape Speed Adjustment
P-4-A063
6.3kHz, –10dB
Azimuth Adjustment
0dB=0.775V
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