Sony CFD-V77S User manual
CFD-V77S
AEP Model
E Model
SERVICE MANUAL
CD RADIO CASSETTE-CORDER
MICROFILM
SPECIFICATIONS
CD player section
System Compact disc digital audio system
Laser diode properties Material: GaAlAs
Wavelength:780 nm
Emission duration : Continuous
Laser output : Less than 44.6 µW
(This output is the value measured at a
distance of about 200 mm from the objective
lens surface on the optical pick-up block
with 7 mm aperture.)
Spindle speed 200 r/min (rpm) to 500 r/min (rpm) (CLV)
Number of channels 2
Frequency response 20 – 20,000 Hz + 1/-2 dB
Wow and flutter Below measurable limit
Radio section
Frequency range FM Italy 87.5 – 108 MHz
Other European 87.6 – 107 MHz
models and Saudi Arabia
Other models 87.6 – 108 MHz
MW Italy 526.5 – 1,606.5 kHz
Other European 531 – 1,602 kHz
models and Saudi Arabia
Other models 530 – 1,605 kHz or
531 – 1,602 kHz
SW1 2.3 – 7 MHz
SW2 7 – 22 MHz
IF FM : 10.7 MHz
AM/MW : 455 kHz
Aerials FM : Telescopic aerial
MW : Built-in ferrite bar aerial
Cassette-corder section
Recording system 4 -track 2 channel stereo
Fast winding time Approx. 120 s (sec.) with Sony cassette C-60
Frequency response TYPE I (normal) : 70 – 10,000 Hz
General
Speakers Full range : 10 cm dia., 6 Ω, cone type (2)
Outputs Headphones jack (stereo minijack)
For 16 – 68 Ωimpedance headphones
Maximum power output 4.5 W + 4.5 W
Power requirements For CD radio cassette-corder
Europe
230 V AC, 50 Hz
Other countries
110 – 120, 220 – 240 V AC selectable, 50/60
Hz or 230 V AC, 50 Hz
9 V DC, 6 R20 (size D) batteries
Power consumption AC 25 W
— Continued on next page —
Model Name Using Similar Mechanism CFD-V17
CD CD Mechanism Type KSM-213CDM
Section Optical Pick-up Name KSS-213C
Tape deck Model Name Using Similar Mechanism CFD-V17
Section Tape Transport Mechanism Type MF-V10-117
Ver 1.1 1999. 05
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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— 2 —
TABLE OF CONTENTS
1. SERVICE NOTES ···························································· 3
2. GENERAL ·········································································· 4
3. DISASSEMBLY
3-1. Front Cabinet Assy ····························································· 5
3-2. Control Board ····································································· 6
3-3. Cabinet (upper) Assy ·························································· 6
3-4. Power, Battery, Half Battery, Voltage Selection Board ······ 7
3-5. Volume, Lcd, Mono st, Main Board ··································· 7
3-6. Mechanism Deck, Optical Pick-up Section························ 8
4. DIAL POINTER INSTALLATION ······························· 9
5. ADJUSTMENT
5-1. Mechanical Adjustment ···················································· 10
5-2. Electrical Adjustment ······················································· 10
5-3. Tuner Section···································································· 11
5-4. Reference·········································································· 15
6. DIAGRAMS
6-1. Circuit Board Location····················································· 17
6-2. Block Diagram ································································· 18
6-3. Printed Wiring Board························································ 21
6-4. Schematic Diagram – Main Board(1/3) – ························ 25
6-5. Schematic Diagram – Main Board(2/3) – ························ 28
6-6. Schematic Diagram – Main Board(3/3) – ························ 31
6-7. IC Pin Function Description············································· 33
7. EXPLODEDVIEWS·················································38
8. ELECTRICAL PARTS LIST ···································44
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH
MARK !ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
Battery life For CD radio cassette-corder:
FM recording
Sony R20P : approx. 3.5 h
Sony alkaline LR20 : approx. 10 h
Tape playback
Sony R20P : approx. 1.5 h
Sony alkaline LR20 : approx. 5 h
CD playback
Sony R20P : approx. 1 h
Sony alkaline LR20 : approx. 4 h
Dimensions Approx. 420 ×165 ×256 mm (w/h/d)
(16 5/8×6 1/2×10 1/8inches) (incl. projecting
parts)
Mass (incl. batteries) Approx. 4.2 kg (9 lb. 4 oz)
Supplied accessories AC power cord (1)
Design and specifications are subject to change without notice.
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Checktheantenna terminals, metal trim, “metallized” knobs,screws,
and all other exposed metal parts forAC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operatedAC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2VAC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µ
F1.5 k
Ω
AC
Voltmeter
(0.75V)
Earth Ground
Fig.A. Using an AC voltmeter to check AC leakage.
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.
Flexible Circuit Board Repairing
• Keep the temperature of 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.
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TEL 13942296513 QQ 376315150 892498299
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— 3 —
SECTION 1
SERVICE NOTES
NOTES ON HANDLINGTHE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc., on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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.
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.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
•Code number of Chuck Plate Jig : X-4918-255-1
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Press CD open knob.
2. Open the lid for CD.
3. Push on SWITCH (S801) as following figure.
4. 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 once for the focus search.
This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.
The following caution label is located inside the unit.
Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.
CAUTION
Use of controls or adjustments or performance of procedures
otherthanthosespecified herein may result in hazardous radiation
exposure.
Insert a precision screw driver
and push SWITCH(S801)
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TEL 13942296513 QQ 376315150 892498299
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— 4 —
SECTION 2
GENERAL
LOCATION AND FUNCTION OF CONTROLS
MAIN UNIT
1Tape operation buttons
rbutton
·button
0button
)button
p, 6button
Pbutton
2CASSETE LID
3FM rod antenna
4DISPLAY ENTER button
5CD ^button
6CD 6PUSH OPEN/CLOSE button
7CD +button
8CD pbutton
9Battery compartment
!º TUNE knob
!¡ CD =button
!™ DIAL
!£ BAND switch
!¢ FUNCTION switch
!∞ OPR/BATT indicator
!§ TONE knob
!¶ 2Phones jack
!• MEGA BASS knob
!ª AC IN jack
@º VOLUME knob
@¡ PLAY MODE button
@™ Information display
@£ FINE TUNING knob
123456 7
8
9
0
!¡
!™!¢ !£!∞!§!¶!•
!ª
@º
@¡
@™
@£
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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— 5 —
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
•The equipment can be removed using the following procedure.
3-1. FRONT CABINET ASSY
0
Front cabinet assy
Rear cabinet assy
1
Lid battery case
4
Three screws
+BVTP 3
×
12
6
Open the CD lid in
the direction of the arrow.
2
Three screws
+BVTP 3
×
10
3
Screw
+BVTP 3
×
10
7
Screw
+BVTP 3
×
12
5
Remove the Handle
in the direction of the arrow.
8
Vol knob
9
Tone knob
Volume, lcd,
mono st, main board Mechanism deck, optical pick-up section
Control board
Cabinet (upper) assy
Front cabinet assy
Set Power, battery, half battery, voltage selection board
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TEL 13942296513 QQ 376315150 892498299
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— 6 —
3-3. CABINET (UPPER) ASSY
3-2. CONTROL BOARD
8
6
Screw
+BVTP 3
×
12
5
Two screws
+BVTP 3
×
10
1
Three screws
+BVTP 3
×
12
4
Screw
+BVTP 3
×
12
!¡
Screw
+BVTP 2.6
×
8
0
Open the Handle in
the direction of the arrow.
2
Open the cassette holder assy by
pressing STOP/EJECT button.
3
Open the CD lid in
the direction of the arrow.
Rear cabinet
STOP/EJECT
button
Knob(FT)
Chassis(FT)
FINE TUNING
board
7
Connector
9
Cabinet (upper) assy
Front cabinet assy
2
CONTROL boar
d
5
Two screws
+BVTP 2.6
×
8
1
Four screws
+BVTP 2.6
×
8
3
Screw
+BVTP 2.6
×
8
4
Knob (TU)
6
CD button
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TEL 13942296513 QQ 376315150 892498299
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— 7 —
3-4. POWER, BATTERY, HALF BATTERY,VOLTAGE SELECTION BOARD
3-5. VOLUME, LCD, MONO ST, MAIN BOARD
!™
MONO ST board
5
Five screws
+BVTP 3
×
10
!£
MAIN board
9
Connector
!¡
Connector
0
Connector
7
Connecto
r
2
VOLUME board
4
LCD board
8
Flexible
3
Flexible
1
Three Screws
+BVTP 3
×
10
6
3
Two screws
+BVTP 3
×
10
0
Two screws
+BVTP 3
×
10
1
Four screws
+BVTP 3
×
10
5
POWER board
Rear cabinet assy
!™
VOLTAGE SELECTION
board
!¡
Cover(VOL SEL)
8
BATTERY board
9
HALF BATTERY
board
6
Two screws
+BVTP 3
×
8
7
Two connectors
4
Connector
2
Plate(Transformer 4.5W), shield
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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— 8 —
3-6. MECHANISM DECK, OPTICAL PICK-UP SECTION
9
Optical pick-up section
4
Mechanism deck
3
Three screws
+BVTP 3
×
10
5
Two screws
6
Two screws
7
Remove solder
8
CD MOTOR board
1
Two screws
+BVTP 3
×
1
0
2
RECORD
switch board
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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— 9 —
SECTION 4
DIAL POINTER INSTALLATION
Note : Follow the installation procedure in the numerical order given.
1Align the pointer with the groove of front cabinet assy and insert it as shown in the illustration.
2Align Knob (TU) with front cabinet and fasten the screw.
3Turn the Knob (TU) in the direction of the arrow as shown in the illustration until pointer agrees with scale “ 0 ” (at leftmost end of
scale).
4Turn the tuning capacitor gear fully in the direction of the arrow as shown in the illustration.
5Fasten the front cabinet assy and rear cabinet assy with the screws.
2
Screw
+BVTP 2.6
×
8
1
Pointe
r
Knob (TU)
Front Cabinet assy
3
Knob (TU)
4
Tuning capacitor gear Rear cabinet assy
5
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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— 10 —
SECTION 5
ADJUSTMENTS
Torque Meter
CQ-403A
Meter Reading
more than 60 g
(more than 2.12 oz)
5-2. ELECTRICAL ADJUSTMENT
Standard output level
Test tape
Tape Speed Adjustment
Procedure :
Mode : Playback
Adjustment Value : normal tape speed
Adjust the tape speed adjustment control inside motor, so that the
frequency counter reading becomes 3,000 Hz.
Specification Value :
Frequency difference between the beginning and the end of the
tape should be within 1.5% (45 Hz).
Adjustment Location :
HP OUT
32 Ω
0.25 V (–10 dB)
Output
Load impedance
Output signal level
Test Tape
WS-48A
P-4-A063
Used for
Tape speed adjustment
Head azimuth adjustment.
Signal
3 kHz, 0 dB
6.3 kHz, –10 dB
5-1. MECHANICAL ADJUSTMENT
PRECAUTION
1. Clean the following parts with a denatured-alchool-moistened
swab: record/playback head pinch roller
erase head rubber belts
capstans
2. Demagnetize the record/playback head with a head
demagnetizer. (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.
Torque Measurement
TapeTension Measurement
Meter Reading
18 – 60 g•cm
(0.25 – 0.83 oz•inch)
1.0 – 5.0 g•cm
(0.014 – 0.069 oz•inch)
45 – 95 g•cm
(0.62 – 1.32 oz•inch)
45 – 95 g•cm
(0.62 – 1.32 oz•inch)
Mode
FWD
FWD
back tension
Fast Forward
Rewind
Torque Meter
CQ-102C
CQ-201B
0dB = 0.775V
TAPE RECODER SECTION
Tape speed adjustment
control inside motor
32
Ω
test tape
WS-48A
(3kHz, 0dB)
set
digital frequency
counter
J301 (phones)
+
–
Digital frequency counter
2,910 – 3,090Hz
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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— 11 —
5-3. TUNER SECTION
•Switch Location
VOLUME : MAX
MEGA BASS : OFF
PRESET SOUND MODE : OFF
Setting :
FUNCTION switch : RADIO
BAND : MW
Signal generator
Setting :
FUNCTION switch : RADIO
BAND : FM
Signal generator
Setting :
FUNCTION switch : RADIO
BAND : SW1/SW2
FINE TUNING knob : mechanical mid
0 dB = 1 µV • Repeat the procedures in each adjustment several times for the
maximum level meter indication.
• The frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
FM SECTION
( ) : Saudi Arabia model
[ ] : AEP model
< > : Italian model
Adjustment Location : Main board (See page 13)
Put the lead-wire
antenna close to
the set.
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
MW RF signal
generator
0.01
µ
F
FM RF signal
generator
telescopic
antenna
input
75kHz (100%) amplitude modulation
by 1kHz signal.
Output level : as low as possible
32
Ω
set +
–
level mete
r
J301 (phones)
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 86.5 MHz (87.35 MHz )[87.0 MHz]<87.35MHz>
CT2 109.5 MHz (107.8 MHz)[108.3 MHz]<108.25 MHz>
MW SECTION
SW SECTION
set
AM rf signal
generator telescopic antenn
a
input
10 pF
30% amplitude modulation by 400 Hz
signal output level : as low as possible
32
Ω
set +
–
level mete
r
J301 (phones)
SW1 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 CT5
2.2 MHz 7.3 MHz
SW1 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L6 CT6
2.2 MHz 7.3 MHz
SW2 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L7 CT9
6.8 MHz 22.5 MHz
SW2 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L8 CT10
6.8 MHz 22.5 MHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 10.7 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 86.5 MHz(87.35 MHz )[87.0 MHz]<87.35 MHz>
CT1 109.5 MHz(108.25 MHz )[108.3 MHz]<108.25 MHz>
MW IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2 455 kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 620 kHz
CT3 1,400 kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 520 kHz (516 kHz)<516 kHz>
CT4 1,680 kHz (1,630 kHz)<1,630 kHz>
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TEL 13942296513 QQ 376315150 892498299
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— 12 —
FMVCO Adjustment
Procedure :
1. Connect frequency counter to the positions shown below.
2. Tune the set to 98MHz.
3. Adjust RV1 so that the frequency counter reading becomes
76,000 Hz.
Specification Value :
Adjustment Location : MAIN board (See page 13)
BLACK 10.64MHz
BLUE 10.67MHz
RED 10.70MHz
ORANGE 10.73MHz
WHITE 10.76MHz
0.01
µ
F
FM RF SSG
to FM ANT IN terminal
Carrier frequency : 98MHz
IF frequency : According to
the color of CF1.
Modulation : no modulation
Output level : 0.1V (100dB)
color
mark CF1
Frequency counter
75,950 – 76,050 Hz
Frequency counte
r
0.01
µ
F+
–
33k
Ω
IC1 Pin
4
IC1 Pin
7
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Q
Q
TEL 13942296513 QQ 376315150 892498299
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— 13 —
15
74
1
30 16
IC1
CV1
L1
FM Tracking
Adjustment
L5
SW1 Tracking
Adjustment
CT9
SW2 Tracking
Adjustment
L7
SW2 Tracking
Adjustment
CT5
SW1 Tracking
Adjustment
L2
FM Frequency
Coverage
Adjustment
L4
MW Frequency
Coverage
Adjustment
CT6
SW1 Frequency
Coverage
Adjustment
CT10
SW2 Frequency
Coverage
Adjustment
L8
SW2 Frequency
Coverage
Adjustment
L6
SW1 Frequency
Coverage
Adjustment
T1
FM IF
Adjustment
RV1
FM VCO
Adjustment
FM ANT IN terminal
L3
MW Tracking
Adjustment
T2
MW IF
Adjustment
MW OSC
MW OSC
FM OSC FM OSC
CT2
FM Frequency
Coverage
Adjustment
CT4
MW Frequency
Coverage
Adjustment
CT3
MW Tracking
Adjustment CT1
FM Tracking
Adjustment
Set the CT2 (FM OSC) and CT4 (MW OSC)
trimmers to their extreme outside.
Inside NG Outside OK
Adjustment Location : MAIN board (Component side)
Adjustment Location : MAIN board (Conductor side)
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TEL 13942296513 QQ 376315150 892498299
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— 14 —
Notes on Check
1. Perform the traverse check in the CD test mode.
After check, be sure to exit the test mode.
2. Perform check in the order given.
3. Use the disc (YEDS-18, Parts No. 3-702-101-01) only when
so indicated.
Before Check
Put the set into test mode and perform the following checks.
Repair if there are any problems.
• Sled Motor Check
Press +, =keys and confirm that the Optical pick-up moves
smoothly from the innermost to outermost circumference and back
smoothly and with no catching or abnormal noises.
(Cancellation of BTL mute)
+: Optical pick-up moves to the outer circumference.
=: Optical pick-up moves to the inner circumference.
• Focus Search Check
1. Press the CD ^key. (Focus search operation is performed
continuously.)
2. Look at the Optical pick-up objective lens and confirm that it
moves up and down smoothly, with no catching or abnormal
noises.
3. Press pbutton.
Confirm that focus search operation stops. If it does not, press
pbutton again longer.
How to Enter the Set intoTest Mode
1. Set the function switch to power off.
2. Set the function switch to CD while =key and pkey
pressing.
The set is into CD test mode (88 is displayed).
3. Turn the power off to release test mode.
How to Exit theTest Mode
Turn the POWER OFF.
CD SECTION TRAVERSE Check
This check is to be done when the optical pick-up block is replaced.
Check Procedure:
1. Connect the oscilloscope to test point TP (VC) andTP (TE) on
MAIN board.
2. Put the set into test mode.
3. Optical pick-up setting to the center by +or =button
pushing.
4. Insert disk (YEDS-18) and press ^button.
5. Check that the oscilloscope traverse waveform is symmetrical,
as shown in the figure below.
6. Release test mode after adjustment is completed.
[MAIN BOARD] (Conductor side)
A
B
C
0V VOLT/DIV : 0.1
V
TIME/DIV : 1m
s
A = B C = 300mV – 700mV
TP(RF)
TP(VC)
TP(FE)
TP(TE)
+
–
Oscilloscope
(DC range)
TP (VC)
TP (TE)
TP (FE)
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Q
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TEL 13942296513 QQ 376315150 892498299
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— 15 —
Focus Bias Check
This check is to be done when the optical block replaced.
Check Procedure:
1. Connect the oscilloscope to test point TP (VC) and TP (RF) on
MAIN board.
2. Put the set into test mode.
3. Opitical pick-up setting to the center by + or – button pushing.
4. Insert disk (YEDS-18) and press ^button.
5. Press the MODE button. (Tracking servo ON)
6. Check that the oscilloscope wavewform is as showninthe figure
below (eye pattern).
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
7. Release test mode after adjustment is completed.
• RF signal reference waveform (eye pattern)
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensivity.
[MAIN BOARD] (Conductor side)
5-4. REFERENCE
Focus/Tracking Gain Check
Adjustment Location : MAIN board (Component side)
(See page 16)
A frequency response analyzer is necessary in order to perform this
check exactly.
However, this gain has a margin, so even if it is slightly off, there is
no problem.
Focus/Tracking gain determines the pick-up follow-up (vertical and
horizontal)relative to mechanical noise and mechanical shock when
the 2-axis device operate.
Tracking
Gain
Symptoms Focus
• The time until music starts
becomes longer for STOP ➡
CD ^or automatic
selection (0, )buttons
pressed). (Normally takes
about 2 seconds.)
• Music does not start and disc
continues to rotate for STOP
➡CD ^or automatic
selection (0, )buttons
pressed.)
• Sound is interrupted during
PLAY. Or time counter
display stops progressing.
• More noise during 2-axis
device operation.
low
—
—
high
low or high
low
low
high
Check Procedure:
1. Keep the set horizontal.
2. Inset disk (YEDS-18) and press ^button.
3. Connect an oscilloscope to TP (FE) and TP (VC) on the MAIN
board.
4. Check that the waveform is as shown in the figure below. (Focus
waveform)
VOLT/DIV : 0.2V
TIME/DIV : 500n
s
0.9Vp-p – 1.3Vp-p
TP(RF)
TP(VC)
+
–
Oscilloscope
(DC range)
TP
(RF)
TP(VC)
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Q
Q
TEL 13942296513 QQ 376315150 892498299
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— 16 —
• Good Example
• Incorrent Examples (DC level changes more than on adjusted
waveform)
5. Connect an oscilloscope between TP (TE) and TP (VC).
6. Insert disc (YEDS-18) and press the CD ^button.
7. Check that the waveform is as shown in the figure below.
(tracking waveform)
low focus gain
high focus gain
low tracking gain
high tracking gain
(high fundamental wave than for low gain)
[MAIN BOARD] (Conductor side)
• Incorrect Examples (Fundamental wave appears)
100mV
0V
VOLT/DIV : 100m
V
TIME/DIV : 1ms
VOLT/DIV : 100m
V
TIME/DIV : 2ms
200mV
0V
VOLT/DIV : 100m
V
TIME/DIV : 2ms
75mV
0V
VOLT/DIV : 0.2
V
TIME/DIV : 2ms
0V
VOLT/DIV : 0.2
V
TIME/DIV : 2ms
0V
VOLT/DIV : 0.2
V
TIME/DIV : 2ms
0V
TP(RF)
TP(VC)
TP(FE)
TP(TE)
+
–
Oscilloscope
(DC range)
TP (VC)
TP (TE)
TP (FE)
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Q
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TEL 13942296513 QQ 376315150 892498299
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CFD-V77S
SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
— 17 — — 18 — — 19 — — 20 —
6-2. BLOCK DIAGRAM
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•b: Pattern from the side which enables seeing.
Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•¢: internal component.
•2: nonflammable resistor.
•C: panel designation.
•H: adjustment for repair.
•U: B+ Line.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– For MAIN BOARD (1/3) –
no mark :PLAY (TAPE SECTION)
CD STOP
( ) : REC (TAPE SECTION)
– For MAIN BOARD (2/3) –
no mark :CD PLAY
TAPE STOP
– For MAIN BOARD (3/3) –
no mark : FM
( ) : MW
[ ] : SW
• Voltagesaretakenwith aVOM(Input impedance 10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: FM
E: PB
a: REC
J: CD
• Abbreviation
EA : Saudi Arabia model
SP : Singapore model
CEF : Italian model
CET : East European and Russian models
BATTERY board
CONNECTOR board
HALF BATTERY board
CD MOTOR board
MAIN board
VOLTAGE
SELECTION
board FINE TUNING
board
POWER board
VOLUME board
CONTROL board
RECORD SWITCH board
LCD board
MONO ST board
The components identified by mark !or dotted
line with mark !are critical for safety.
Replace only with part number specified.
VOLTAGE
SELECTION
BOARD
E,EA,SP MODELSAEP, CEF, CET MODELS
CNB907
3
MONO ST
BOARD
AEP, CEF, CET MODEL
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9
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3
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2
2
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9
2
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1
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3
Q
Q
TEL 13942296513 QQ 376315150 892498299
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CFD-V77S
12
A
B
C
D
E
F
G
H
I
3 4 5 6 7 8 9 10111213141516171819202122232425
— 21 — — 22 — — 23 — — 24 —
6-3. PRINTEDWIRING BOARD • Refer to page 20 for Note on Printed Wiring Board. • Refer to page 17 for Circuit Boards Location.
Ref. No. Location
D1 C-3
D2 C-3
D3 E-4
D4 E-4
D301 G-9
D302 D-9
D307 E-8
D308 D-8
D310 H-9
D311 C-10
D312 G-8
D314 H-8
D401 C-11
D402 C-11
D403 B-10
D404 B-10
D406 B-10
D407 B-10
D408 B-10
D409 D-11
D410 D-11
D411 D-11
D801 D-7
D901 D-20
D902 C-20
D903 D-20
D904 D-20
IC1 E-5
IC301 F-9
IC303 D-10
IC304 F-10
IC701 B-5
IC702 C-9
IC703 C-4
Q1 E-6
Q2 G-5
Q101 F-10
Q102 G-8
Q103 H-8
Q201 E-9
Q202 G-8
Q203 G-9
Q301 E-9
Q307 C-11
Q308 C-10
Q309 C-10
Q310 E-8
Q401 B-11
Q402 B-11
Q403 B-10
Q404 B-10
Q405 B-11
Q406 C-10
Q407 D-9
Q408 A-10
Q409 D-11
Q701 B-6
Q801 D-6
• Semiconductor
Location
RED
WHT
BLK
11
(11)
11
(11)
11
(11)
11
(11)
11
(11)
11
(11)
11
(11)
11
(11)
1-672-302- 1-672-358-
DRY BATTERY
SIZE "D"
IEC DESIGNATION
R20 3PCS. 4.5V
DRY BATTERY
SIZE "D"
IEC DESIGNATION
R20 3PCS. 4.5V
BATTERY BOARDVOLUME BOARD
POWER BOARD
CONTROL BOARDLCD BOARD CONNECTOR BOARD
HALF BATTERY
BOARD
T901
POWER
TRANSFORMER
1-672-956-
BLU
WHT
RED
RED
WHT
BLU
YEL
135
1
3
5
S901
S901
VOLTAGE SELECTOR
110 - 120V
220 - 240V
1-672-960-
VOLTAGE SELECTION
BOARD
J901
~ AC IN
1-672-958- 1-673-261-
DISPLAY/ENTER
PLAY MODE
LCD800
(LIQUID CRYSTAL DISPLAY)
1-672-957-
11
(11)
MEGA BASS
1-672-959-
VOLUME
RED
WHT
BLU
YEL
BLK
BRO
VIO
RECORD SWITCH
BOARD
S301
REC
PB
1-672-955-
RED
WHT
GRY
WHT
L3
FERRITEROD
ANTENNA
(MW)
MAIN BOARD
OPTICAL
PICK-UP BLOCK
ASSY
CV1
TUNING
FINE
TUNING
ANT1
FM TELESCOPIC
ANTENNA
-1 -2
-7 -8
-5 -6
-3 -4
S1
BAND
MW
SW2
SW1
FM
S351
FUNCTION
TAPE
(CD/RADIO OFF)
RADIO
CD
D310
(OPR/BATT)
TONE
RED
WHT
BLU
YEL
BLK
BRO
VIO
11
(11)
RED
WHT
BLU
YEL
REC/PB
HEAD
11
(11)
1-672-961-
FINE TUNING BOARD
PS901
MONO ST BOARD
AEP, CEF, CET MODELS
AEP, CEF, CET MODELS
AEP, CEF, CET
MODELS
E, EA, SP MODELS
E, EA, SP MODELS
E, EA, SP MODELS
E, EA, SP MODELS
AEP, CEF, CET MODELS
AEP, CEF, CET
MODELS
EA MODEL
AEP, CEF, CET
MODELS
E, EA, SP
MODELS
R251
16
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Q
Q
TEL 13942296513 QQ 376315150 892498299
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CFD-V77S
— 25 — — 26 — — 27 —
6-4. SCHEMATIC DIAGRAM – MAIN BOARD (1/3) – • Refer to page 20 for Note on Schematic Diagram. • Refer to page 35 for IC Block Diagrams.
The components identified by mark !or dotted
line with mark !are critical for safety.
Replace only with part number specified.
1
CN 301 2REC MODE
30Vp-p
55.2kHz
10V/div
10µsec/div
C313
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4
2
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8
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4
2
2
9
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5
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3
9
9
2
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4
2
9
8
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5
1
5
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3
6
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3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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CFD-V77S
— 28 — — 29 — — 30 —
6-5. SCHEMATIC DIAGRAM – MAIN BOARD (2/3) – • Refer to page 20 for Note on Schematic Diagram. • Refer to page 35 for IC Block Diagrams.
The components identified by mark !or dotted
line with mark !are critical for safety.
Replace only with part number specified.
2
IC701 #£ RFO
3
IC702 `XTAO
0.2V/div
0.5µsec/div
2V/div
50µsec/div
104
5 Vp-p
1.0 Vp-p
16.9 MHz
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4
2
2
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9
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1
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6
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Q
Q
TEL 13942296513 QQ 376315150 892498299
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