Sony CFDS-28-L Service manual
CFD-S28L
SERVICE MANUAL
Ver 1.0 1999. 04
CD
Section
TAPE
Section
AEP Model
UK Model
Australian Model
Model Name Using Similar Mechanism NEW
CD Mechanism Type KSM-213CDM
Optical Pick-up Name KSS-213C
Model Name Using Similar Mechanism CFD-V10
Tape Transport Mechanism Type MF-V10-117
SPECIFICATIONS
MICROFILM
– Continued on next page –
CD RADIO CASSETTE-CORDER
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 3
2. GENERAL ................................................................... 4
3. DISASSEMBLY ......................................................... 7
4. MECHANICAL ADJUSTMENTS ....................... 13
5. ELECTRICAL ADJUSTMENTS
TAPE DECK Section ...................................................... 13
TUNER Section .............................................................. 14
CD Section ...................................................................... 16
6. DIAGRAMS
6-1. Block Diagram – CD Section – ...................................... 17
6-2. Block Diagram – TUNER Section – .............................. 19
6-3. Block Diagram – MAIN Section –................................. 21
6-4. Printed Wiring Board – TUNER Section – ................... 26
6-5. Schematic Diagram – TUNER Section – ....................... 27
6-6. Printed Wiring Boards – MAIN Section – .................... 29
6-7. Schematic Diagram – MAIN Section (1/3) –................ 32
6-8. Schematic Diagram – MAIN Section (2/3) –................ 35
6-9. Schematic Diagram – MAIN Section (3/3) –................ 37
6-10. Printed Wiring Boards
– POWER SUPPLY Section – ........................................ 41
6-11. Schematic Diagram – POWER SUPPLY Section –...... 43
6-12. IC Pin Function Description ........................................... 49
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
7. EXPLODED VIEWS ................................................ 51
8. ELECTRICAL PARTS LIST ............................... 57
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED
LINE WITH MARK ! ON THE SCHEMATIC DIA GRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.
– 2 –
SECTION 1
CF1, 2
mark
SERVICENG NOTES
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the lid (CD), use
Chuck Plate Jig.
• Code number of Chuck Plate Jig: X-4918-255-1
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
HOW TO CHANGED THE CERAMIC FILTERS
This model is used two ceramic filters of CF1 and CF2.
You must used same type of color marked ceramic filters in order
to meet same specifications.
Therefore, the ceramic filter must changed two pieces together
since it’s supply two pieces in one package as a spare parts.
Mark Center frequency
red 10.70 MHz
blue 10.67 MHz
orange 10.73 MHz
black 10.64 MHz
white 10.76 MHz
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Turn ON the PO WER button and press FUNCTION button to
CD position.
2. Open the lid (CD).
3. Turn on S501 with screwdriver, etc. as following figure.
4. Press the CD fl button.
5. Confirm the laser diode emission while observing the objecting lens. When there is no emission, Auto Power Control circuit or Optical Pick-up is broken.
Objective lens moves up and down three times for focus search.
S501
– 3 –
SECTION 2
GENERAL
This section is extracted from
instruction manual.
– 4 –
– 5 –
– 6 –
• This set is can be disassembled in the order shown below.
m
SECTION 3
DISASSEMBLY
Set
Note: Follow the disassembly procedure in the numerical order given.
Front cabinet
assy
Wires
Power
transformer
Tuner
board
FRONT CABINET ASSY
2
two screws
(BVTP3
×
10)
2
two screws
(BVTP3
Cabinet (upper)
assy
1
battery case lid
×
10)
Main
board
Lid (CD)
Cassette
holder assy
CD mechanism
block
Tape mechanis
block
5
connector
(CN306)
2
three screws
(BVTP3
×
12)
4
flat wire (6 core)
(CNP502)
3
front cabinet assy
– 7 –
WIRES
)
T
Put flat cable and wires between the cabinets and push them in the
grooves located at A to F in the figure to prevent disconnection
before assembling the set.
FRONT CABINE
POWER TRANSFORMER
A
D
B
C
CABINET (REAR
E
F
1
two screws
(BVTP3
2
power
transformer
×
10)
1
two screws
(BVTP3
1
×
10)
two screws
(BVTP3
×
10)
3
3
connector
(CNP902)
– 8 –
connector
(CNP901)
TUNER BOARD
6
Remove the solder
of two connector leads.
3
screw
(BVTP3
×
10)
4
two retainer boards
5
TUNER board
2
telescopic antenna
1
screw
(B3 × 8)
– 9 –
CABINET (UPPER) ASSY
)
3
4
three screws
(BVTP3
×
10)
cabinet (upper)
assy
2
Open the cassette
holder assy.
3
three screws
(BVTP3
×
10)
1
Open the lid (CD).
3
screw
(BVTP3
5
handle
×
10)
MAIN BOARD
3
2
two connectors
two screws
(BVTP3
×
10)
3
two screws
(BVTP3
×
10)
4
screw
(BVTP3
×
12)
3
6
1
three screws
(BVTP3
×
10)
5
MAIN board
three connectors
(CNP301, 304, 305
flat wire (16 core)
– 10 –
LID (CD)
1
Push and open
the lid (CD).
6
Remove the lid (CD).
5
two bosses
CASSETTE HOLDER ASSY
2
Open the cassette
holder assy.
1
Push the eject button.
3
2
damper
screw
(BVTP3
×
10)
7
cassette holder
assy
6
two bosses
4
spring (CD)
4
3
damper
screw
(BVTP3
×
10)
5
spring (cassette)
– 11 –
CD MECHANISM BLOCK
2
two screws
(2.6
×
10)
1
two screws
×
10)
(2.6
2
CD mechanism block
TAPE MECHANISM BLOCK
1
two screws
(BVTP3
wiring stopper
×
10)
2
tape mechanism block
1
screw (BVTP3 × 10)
– 12 –
SECTION 4
r
– TAPE deck block –
CAPSTAN /REEL motor
(M301)
Tape Speed
Adjustment
MECHANICAL ADJUSTMENTS
SECTION 5
ELECTRICAL 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.
• Torque Measurement
Mode Torque Meter Meter Reading
FWD CQ-102C
FWD
Back Tension (0.021 – 0.076 oz•inch)
FF CQ-201B
REW CQ-201B
CQ-102C
• Tape T ension Measurement
Mode Tension Meter Meter Reading
FWD CQ-403A
30 – 70 g•cm
(0.42 – 0.97 oz•inch)
1.5 – 5.5 g•cm
more than 60 g•cm
(more than 0.83 oz•inch)
more than 60 g•cm
(more than 0.83 oz•inch)
more than 100 g
(more than 3.53 oz)
PRECAUTION
1. Setting
SOUND control : OFF
TAPE DECK SECTION 0 dB=0.775 V
Test tape
Type Signal Used for
WS-48A 3 kHz, 0 dB Tape Speed Adjustment
Tape Speed Adjustment
Setting:
Function: TAPE
Test tape
WS-48A
(3 kHz, 0 dB)
set
Procedure:
1. Playback WS-48A (tape center) in the FWD state.
2. Adjsut the volume in CAPSTAN/REEL motor (M301) so that
the frequency counter reading becomes 3,000 Hz.
Specification Values: 2,985 to 3,015 Hz
3. Adjust the volume in CAPSTAN/REEL motor (M301) so that
the frequency at the beginning and that at the end of tape winding are between 2,955 to 3,045 Hz.
frequency counte
32
Ω
2
jack (J301)
+
–
Adjustment Location:
– 13 –
TUNER SECTION 0 dB=1 µV
r
[MW/LW]
Setting:
Function : RADIO
BAND button : MW or LW
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
set
2
32
Ω
jack (J301)
level meter
+
–
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1 450 kHz
MW VCO VOLTA GE CONFIRMATION
Frequency Display Reading on Digital Voltmeter
531 kHz 0.8
1,611 kHz 5
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3-1 621 kHz
CT3 1,404 kHz
+ 0.7 V
– 0.5 V
+ 1.2 V
– 0.6 V
[FM]
Setting:
Function : RADIO
BAND button: FM
FM RF signal
generator
0.01 µF
22.5 kHz frequency
deviation by 400 Hz
antenna terminal
set
2
jack (J301)
32
level meter
Ω
+
–
signal
Output level: as low as possible
digital voltmete
Ω
TUNER board
100 k
JW17
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer capacitors.
• Remove FM antenna in FM adjustment.
LW VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L4 279 kHz 5.3 ± 0.1V
Confirmation 153 kHz 0.7
LW TRA CKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3-2 162 kHz
CT5 261 kHz
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L2 108 MHz 4.3 ± 0.1 V
Confirmation 87.5 MHz 1.6 ± 0.4 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 87.5 MHz
CT1 108 MHz
+ 0.3 V
– 0.4 V
Adjustment Location: TUNER board (See page 15)
– 14 –
Adjustment Location:
LW Tracking
Adjustment
MW Tracking
Adjustment
FM Tracking
Adjustment
– TUNER BOARD –
(Component Side)
CT5
L3-2
CT3
L3-1
CT1
L1
Antenna
Terminal
JW17
L4
LW VCO Voltage
Adjustment
L2
FM VCO Voltage
Adjustment
T1
AM IF Adjustment
– 15 –
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