Aiwa CSD-XD51 User manual

CSD-XD51
US Model
SERVICE MANUAL
CD STEREO RADIO CASSETTE RECORDER
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
9-877-952-01
2004F0279-1
© 2004.06
SPECIFICATIONS
Ver 1.0 2004. 06
– Continued on next page –
CD
Model Name Using Similar Mechanism CSD-XD55
Section
CD Mechanism Type KSM-213RDP
Optical Pick-up Name KSS-213R
TC Model Name Using Similar Mechanism CSD-XD55
Section Tape Transport Mechanism Type MF-XD55
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION
With 3.2-ohm loads, both channels driven from 150 - 6,300 Hz;
rated 3.0 W per channel-minimum RMS power, with no more than
10 % total harmonic distortion in AC operation.
Other specifications
CD player section
System Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wave length: 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 87.5 - 108 MHz
AM 530 - 1 710 kHz
Antennas
FM: Telescopic antenna
AM: Built-in ferrite bar antenna
Cassette recorder 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): 80 - 10 000 Hz
General
Speaker
Full range: 10 cm dia., 3.2 ohms, cone type (4)
Tweeter: 2.0 cm (2)
Outputs
Headphones jack (stereo minijack)
For 16 - 68 ohms impedance headphones

2
CSD-XD51
Power output
4.5 W + 4.5 W (at 3.2 ohms, 10% harmonic distortion
(DC))
Power requirements
For CD stereo radio cassette recorder:
120V AC, 60 Hz
9 V DC, 6 size D (R20) batteries
Power consumption
AC 17 W
Battery life
For CD stereo radio cassette recorder:
FM recording
Sony R20P: approx. 12 h
Sony alkaline LR20: approx. 34 h
Tape playback
Sony R20P: approx. 5.5 Ah
Sony alkaline LR20: approx. 15.5 h
CD playback
Sony R20P: approx. 2.5 h
Sony alkaline LR20: approx. 12 h
Dimensions
Approx. 552 x 271 x 318 mm (w/h/d)
(21 3⁄4x 10 5⁄8x12 1⁄2inches) (incl. projecting parts)
Mass Approx. 5.4 kg (11 lb. 14 oz) (incl. batteries)
Supplied accessory
AC power cord (1)
Design and specifications are subject to changewithout notice.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
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.
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.
NOTES ON HANDLINGTHE 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.
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.
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC 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 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15 µF1.5 kΩ
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.

3
CSD-XD51
Unleaded solder
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•Unleaded solder melts at a temperature about 40°C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
•Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
•Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
Note on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be
damaged by heat.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINEWITH
MARK 0ON THE SCHEMATIC DIAGRAMS AND IN THE 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.
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Cabinet (Top) Assy .......................................................... 6
3-3. Cabinet (Front Assy), Cabinet (Bottom) Assy................. 7
3-4. Wires................................................................................ 8
3-5. MD Block ........................................................................ 9
3-6. Cassette Holder................................................................ 9
3-7. Main Board ...................................................................... 10
3-8. Tuner Board ..................................................................... 10
3-9. Power Board .................................................................... 11
3-10. CD Lid ............................................................................. 11
3-11. CD Block Assy ................................................................ 12
3-12. Optical Pick-up ................................................................ 12
3-13. R/P Head (HRP301), TC Board ...................................... 13
3-14. Main Belt, RF Belt, Motor Assy (M301) ........................ 13
4. MECHANICAL ADJUSTMENTS......................... 14
5. ELECTRICAL ADJUSTMENTS .......................... 14
6. DIAGRAMS
6-1. IC Pin Description ........................................................... 17
6-2. Circuit Boards Location .................................................. 17
6-3. Block Diagram – CD Section – ....................................... 18
6-4. Block Diagram – Main Section – .................................... 19
6-5. Printed Wiring Board – CD Section – ............................. 20
6-6. Schematic Diagram – CD Section – ................................ 21
6-7. Printed Wiring Board – Tuner Section – ......................... 22
6-8. Schematic Diagram – Tuner Section – ............................ 23
6-9. Printed Wiring Board – Main Section – .......................... 24
6-10. Schematic Diagram – Main Section (1/2) – .................... 25
6-11. Schematic Diagram – Main Section (2/2) – .................... 26
6-12. Printed Wiring Board – TC Section –.............................. 27
6-13. Schematic Diagram – TC Section – ................................ 28
6-14. Printed Wiring Board – Control Section – ...................... 29
6-15. Schematic Diagram – Control Section – ......................... 30
6-16. Printed Wiring Board – Power Supply Section – ............ 31
6-17. Schematic Diagram – Power Supply Section – ............... 32
6-18. IC Block Diagrams .......................................................... 33
7. EXPLODED VIEWS
7-1. Cabinet Section................................................................ 36
7-2. Cabinet (Front) Section-1 ................................................ 37
7-3. Cabinet (Front) Section-2 ................................................ 38
7-4. Cabinet (Top) Section ...................................................... 39
7-5. Cabinet (Bottom) Section ................................................ 40
7-6. Tape Mechanism Section (MF-XD55) ............................ 41
7-7. CD Mechanism Section (KSM-213RDP) ....................... 42
8. ELECTRICAL PARTS LIST .................................. 43

4
CSD-XD51
CHUCK PLATE JIG ON REPAIRING
SECTION 1
SERVICING NOTES
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Turn ON the[OPERATE]button and press[CD] button to CD
position.
2. Open the CD lid.
3. Turn on S801 with screwdriver, etc. as following figure.
4. Press the N X (CD) 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.
S801
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

5
CSD-XD51
SECTION 2
GENERAL This section is extracted
from instruction manual.
LOCATING THE CONTROLS
Location of controls
ZPUSH
OPEN/CLOSE
PAUSE
STOP/EJECT
FF REW PLAY REC
TUNE –,+
VOLUME –,+*
ZPUSH OPEN/CLOSE
SURROUND
S-BASS
SLEEP
u
POWER HEADPHONES
OPR/BATT
MODE
DISPLAY/ENTER/MEMORY .,>
PRESET –,+
CD, RADIO BAND/
AUTO PRESET,TAPE
x
Loading a CD
With the labeled side up
Inserting a cassette
With the side you want
to play facing you
Total track number Programmed track Playing order
EF
Total playing time
Display
*
The button has a tactile dot.
Display

6
CSD-XD51
• The equipment can be removed using the following procedure.
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-2. CABINET (TOP) ASSY
3-1. DISASSEMBLY FLOW
3-2 CABINET (TOP) ASSY
(Page 6)
3-3. CABINET (FRONT) ASSY,
CABINET (BOTTOM) ASSY
(Page 7)
3-11. CD BLOCK ASSY
(Page 12)
SET
3-4. WIRES
(Page 8)
3-5. MD BLOCK
(Page 9)
3-7. MAIN BOARD
(Page 10)
3-6. CASSETTE HOLDER
(Page 9)
3-10. CD LID
(Page 11)
3-8. TUNER BOARD
(Page 10)
3-13. R/P HEAD (HRP301),
TC BOARD
(Page 13)
3-14. MAIN BELT (B),
SUB BELT (B)
MOTOR ASSY (M301),
(Page 13)
3-9. POWER BOARD
(Page 11)
3-12. OPTICAL PICK-UP
(Page 12)
2 screw
(+BV (B3
) )
1 two screws
(+BV (B3
) )
3 two screws
(+BV (B3
) )
1 two screws
(+BV (B3
) )
4
6
CNP702
5 connector
(CNJ807)
7 connector
(CNP302)
8 cabinet (top) assy

7
CSD-XD51
3-3. CABINET(FRONT)ASSY, CABINET(BOTTOM)ASSY
1 battery lid
2 three screws
(+BV (B3 ) )
3 two screws
(+BV (B3 ) )
4 screw
(+BV (B3 ) )
5 screw
(+BV (B3 ) )
9 CNP805
0 connector
(CNP305)
6 two screws
(+BV (B3 ) )
7 three screws
(+BV (B3 ) )
qa connector
(CNP806)
qd CNP801
cabinet (bottom) ass
y
qs CNP808
8 three screws
(+BV (B3 ) )
qf cabinet (front) assy

8
CSD-XD51
3-4. WIRES
Put flat cable and wires between the cabinets and push them in the
grooves located at A to I in the figure to prevent disconnection before
assembling the set.
cabinet front
cabinet bottom
from MAIN board
A
BCD EF
G
HI

9
CSD-XD51
3-5. MD BLOCK
3-6. CASSETTE HOLDER
1
cassette holder
2 two screws
(+BV (B3
) )
3 two screws
(+BV (B3
) )
4 MD block
1 screw
(+BV (B3 )
)
2 damper
3 cassette holder
4 cassette spring

10
CSD-XD51
3-7. MAIN BOARD
3-8. TUNER BOARD
1 connector
(CNP811)
3 connector
(CNP304)
2 connector
(CNP810)
4 two screws
(+BV (B3
) )
5 screw
(+BV (B3
) )
6 MAIN board
1 screws
(+P (M3 )
)
2 telescopic antenna
3 screws
(+BV (B3 ) )
4 two claws
5
6
TUNER board

11
CSD-XD51
3-9. POWER BOARD
3-10. CD LID
2 two screws
(+BV (B3 ) )
1 connector
(CNP906)
3 two screws
(+BV (B3 ) )
4 screw
(+BV (B3 ) )
5 POWER board
1 projectio
n
2 projection
3 CD lid
CD spring

12
CSD-XD51
3-11. CD BLOCK ASSY
3-12. OPTICAL PICK-UP
1 two screws
(+PWH 2.6 x 10)
2 two screws
(+PWH 2.6 x 10)
3 CD cover
two claws two claws
4 CD block assy
1 gear (A)
claw
5 sled shaft
6 optical pick-up
42
screw
(
PWB tapping (M2)
)
3 screw
(
PWB tapping (M2) )

13
CSD-XD51
3-13. R/P HEAD(HRP301),TC BOARD
3-14. MAIN BELT, RF BELT, MOTER ASSY(M301)
1 two claws
2 R/P head (HRP301)
3 screw
(+BVTT 2
x 4
)
4 lug
5
6
Remove the four solderings.
7 TC board
1 screw
(
bind DT M2 x 6 )
2 screw
(
bind DT M2 x 6 )
3
4
main belt
5 RF belt
6 two screws
(
pan M2.6 x 4.5 )
7 motor assy (M301
)
8 motor bracket

14
CSD-XD51
TAPE SECTION 0 dB = 0.775 V
• 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
Tape Speed Adjustment
Procedure:
Mode: playback
Adjust so that the value on the digital frequency counter is
3,000 Hz.
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. The adjustments should be performed with the rated power
supply voltage (9V) unless otherwise noted.
Torque Measurement
Mode Torque meter Meter reading
2.95 – 6.86 mN • m
FWD CQ-102C (30 – 70 g • cm)
(0.42 – 0.97 oz • inch)
FWD 0.15 – 0.53 mN • m
Back Tension CQ-102C (1.5 – 5.5 g • cm)
(0.021 – 0.076 oz • inch)
more than 5.88 mN • m
FF CQ-201B (more than 60 g • cm)
(more than 0.83 oz • inch)
more than 5.88 mN • m
REW CQ-201B (more than 60 g • cm)
(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 5
ELECTRICAL ADJUSTMENTS
SECTION 4
MECHANICAL ADJUSTMENTS
Specification Value:
Digital frequency counter
2,940 to 3,060 Hz
Adjust so that the frequency at the beginning and that at the end of
tape winding are between 2,970 to 3,030 Hz.
Adjustment Location:
i jack (J321)
set
32
Ω
test tape
WS-48A
(3 kHz, 0 dB)
digital frequenc
y
counter
Tape speed adjustment
control inside motor

15
CSD-XD51
• Connecting Digital Voltmeter (FM, AM)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
AM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display 530 kHz 1,710 kHz
Reading on Digital voltmeter 1.0 ±0.05 V 5.3 ±0.7 V
Adjustment Part L4 <confirmation>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 CT3
620 kHz 1,400 kHz
Adjustment Location: See page 16.
TUNER SECTION 0 dB = 1 µV
• FM Section
Setting:
RADIO BAND•AUTO PRESET button: FM
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
10.7 MHz
FM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display 87.5 MHz 108 MHz
Reading on Digital voltmeter 1.3 ±0.3 V 3.0 ±0.2 V
Adjustment Part <confirmation> L2
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 CT1
87.5 MHz 108 MHz
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
• AM Section
Setting:
RADIO BAND•AUTO PRESET button: AM
30% amplitude
modulation by
400 Hz signal
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
TP (FM IN)
FM RF signal
generator
0.01
µ F
set
• Connecting Level Meter (FM, AM)
ijack (J321)
set
32 Ω
level meter
(range: 0.5–5 V ac
)
digital
voltmeter
100 kΩ
TP (VT)

16
CSD-XD51
IC701
R729
C704
R708
C711
C709
C736
C734
R709
C705
R710
R701 C703
C731
R706
R723
C708
JC703
C743
C742
C707
C739
R735
R733
R734
R736
R711
R713
C732
JW706
JW707
JW709
JW725
JW726
JW708
– CD board (conductor side) –
TP
(RF)
TP
(VREF)
TP(RF)
TP(VREF)
oscilloscope
Adjustment Location:
Test Point:
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
L4
TP (FM IN)
(CONDUCTOR SIDE)
CT1
IC1
IC2
CT3
L1
L2
T2
T1
L3
– MAIN board (component side) –
L4
AM
FREQUENCY
COVERAGE
ADJUSTMENT
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
CT1, L1
FM
TRACKING
ADJUSTMENT
T1
AM IF
ADJUSTMENT
T2
FM IF
ADJUSTMENT
TP (VT)
(CONDUCTOR SIDE)
CT3,L3
AM
TRACKING
ADJUSTMENT
RF level :
0.85 ±0.2 Vp-p
VOLT/DIV : 50 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
1. Connect the oscilloscope between TP (RF) and TP (VREF).
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the N X (CD) button.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape ( ) in
the center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)

CSD-XD51
CSD-XD51
1717
SECTION 6
DIAGRAMS
Pin No. Pin Name I/O Pin Description
6-2. CIRCUIT BOARDS LOCATION
72 VDD — Main power supply pin for A/D converter (+3.3 V)
73 VSS — Main ground
74 X1 I Main system oscillation input (4.19 MHz)
75 X2 O Main system oscillation output (4.19 MHz)
76 RST I System reset input
77 V-CLK O Volume clock output
78 V-DATA O Volume data output
79 SCL O EEPROM clock output
80 SDA I/O EEPROM input/output
6-1. IC PIN DESCRIPTION
• IC802 uPD789477GC-A42-8BT (SYSTEM CONTROLLER) (MAIN BOARD)
Pin No. Pin Name I/O Pin Description
1, 2 NC — Not used. (Open)
3 to 5 VLC2 to 0 I LCD drive bias voltage input
6 to 9 COM0 to 3 O LCD drive common output
10 to 26 S0 to 16 O LCD drive segment output
27 REC I Tape record signal input H: REC
28 AC-CHK I AC power supply detection signal input L: AC in
29 CD-DOOR I CD door open/close switch input L: Close
30 HP DET – Not used.
31 B/LIGHT CONT O Back light ON/OFF control output (Not used).
32 SURROUND CONT O Sorround ON/OFF control output.
33 NC – Not used. (Open)
34 LINE IN O LINE IN signal output (Not used).
35 A-MUTE O Audio mute output H: Mute
36 CD O CD function output H: CD
37 TAPE O Tape function output H: Tape
38 AVDD — Analog power supply pin for A/D converter (+3.3 V)
39 BTT-CHK-H I Battery check input for Hi-voltage
40 BTT-CHK-M I Battery check input for Mid-voltage
41, 42 V CHECK I Not used. (Open)
43 to 45 KEY3 to 1 I Key input
46 MODE CHK I Destination setting input
47 AGND — Analog ground for A/D converter
48 RMC IN I Sircs receiver data input (Not used).
49 TC-PLAY I Tape play switch input L: Play
50 W-UP/INI O Wake-up/Initial setting read signal output
51 3.3V MONITOR I 3.3V MONITOR signal input
52 C-WRQ I CD write request data input
53 C-DOUT I CD digital signal processor data input
54 C-DIN O CD digital signal processor data output
55 C-CLK I CD serial data transfer clock signal input
56 R-COUNT I Tuner PLL IF count input
57 R-DATA O Tuner PLL data output
58 R-CLK O Tuner PLL clock output
59 R-LAT O Tuner PLL latch output
60 B-MUTE O Tuner mute signal output H: Mute
61 C-DRF I CD DRF signal input
62 C-CE O CD chip enable output
63 C-FSEQ I CD frame SYNC input
64 C-XRST O CD system reset output
65 P-CON O System power control output H: PCON
66 ISS1 O ISS1 output
67 ISS2 O ISS2 output
68 DBB O MEGA BASS control output H: MEGA BASS off, L: MEGA BASS on
69 ICO I Connected to VSS.
70 XT1 I Sub system oscillation input (32.768 kHz)
71 XT2 O Sub system oscillation output (32.768 kHz)
HP board
CONTROL board
TC board TUNER board
BATTERY (1) boar
d
BATTERY (2) board
MAIN board
CD board
POWER board

CSD-XD51
1818
CSD-XD51
6-3. BLOCK DIAGRAM – CD SECTION –
•Signal path
J: CD
A
C
B
F
E
D
A
C
B
D
LD
PD
VR
F
T+
T–
F+
F–
SL+
SL–
SP+
SP–
E
VREF
LD
PD
LD POWER
CONTROLLER
Q701 APC
FIN2
FIN1
LDD
LDS
TIN2
TIN1
VREF
RF
10
9
11
80
7
79
48
9
12
11
TRACKING
COIL
DRIVE
19
7
FOCUS
COIL
DRIVE
TIN
FIN
25
SLIN
SLED
MOTOR
DRIVE
3
SPINDLE
MOTOR
DRIVE
SPIN
VREF
OPIN
MUTE
T+
T–
17
18
F+
F–
26
27
SL+
SL–
2
1
SP+
SP–
TRACKING
COIL
FOCUS
COIL
OPTICAL PICK-UP
BLOCK
(KSS-213R)
M
M
M702
SLED
MOTOR
M701
SPINDLE
MOTOR
SLED/SPINDLE
MOTOR DRIVER,
TRACKING/FOCUS
COIL DRIVER
IC702
S701
(LIMIT)
EFMIN
HFL
AGC
PH(RFENV)
FE
TE
VREF
CONT1 FSEQ CONT4 DRF RES DI CE CL WRQ DO XOUT XIN
LCHO
RCHO A
3
67
TDDTD
FD
SP
SL
31 72 25 66 63 61 62 49 4865 64
42
45
RF AMP,
SYSTEM SERVO PROCESSOR,
DIGITAL SIGNAL PROCESSOR
IC701
39
29
61 63 54 62 55 52 5364
X701
16.93MHz
C-CE
C-DIN
C-CLK
C-WRQ
C-XRT
C-DRF
C-FSEQ
C-DOUT
CDDOOR
BTT-CHK-H
65
P-CON
28
AC-CHK
SYSTEM CONTROLLER
IC802 (1/2)
CD +3V
REG
Q302-304,D301
BATTERY
CHECK
Q804,805
POWER
CONTROLLER
Q819,D802
AUDIO+6V
REG
Q305,D302
+3.3V REG
IC801
POWER
SWITCH
Q306,307
POWER
SWITCH
Q308
CD 3.3V
(page 19) CD-CONTROL
S801
PUSH
OPEN/
CLOSE
3.3V
VDD (SW)
AUDIO 6V
D901 – 904
RECT
F902
T901
POWER
TRANSFORMER J901
AC IN
CLV,CAV
CONTROL
PLL
VCEC
SWITCH
ERROR
CORRECTION
AUDIO CD
A/D
CONVERTER,
SERVO
PROCESSOR
FRAME SYNC
DETECT,PROTECT
INSERT
EFM DECODER
INTERPOLATION
MUTE
&
ATTENUATION
DEEMPHASIS
8FS
DIGITAL
FILTER
&
1-bit DAC
LPF
SLICE
LEVEL
CONTROL
GENERAL
PURPOSE
PORT
COMMAND
INTERFACE CLOCK GENERATOR
23
15
FD
SL
SP
TD
VREF
VREF
VREF
CD_IN_R
NC
CD_IN_ L
DRY BATTERY
SIZE " D "
(IEC DESIGNATION R20)
6PCS, 9V
D/A
CONVERTER
PH/BH
RADIO 6V
CD 6V 9V
40
BTT-CHK-M
20
FDD SPDO SLDO
21 22 23
23
51
3.3V-MONITOR
BD303
Q801
Q815
BATT M
VDD
AC-HI
U-COM
(VDD)
AUDIO
OUT
DOUT 39
(page 19)

CSD-XD51
CSD-XD51
1919
6-4. BLOCK DIAGRAM – MAIN SECTION –
•R-ch is omitted due to same as L-ch.
•Signal path
F: FM
f: MW
E: TAPE PLAY
a: TAPE REC
J: CD
B
5
21 22 16
4
L-CH
R-CH
HRP301
RECORD/PLAYBACK
HEAD
HE301
ERASE HEAD
DET
ALC 2
RADIO L
18
15
L.LO
R.LO
LINE
TAPE
R-CH
TU_IN_R
TU_IN_L
TAPE
LOGIC
5
CLOCK
4
DATA
POWER AMP 1
IC304
STBY
D322
R-CH
R-CH
SP103
SPEAKER(LCH)
SP203
SPEAKER(RCH)
SP102
SPEAKER
(L-CH)
SP202
SPEAKER
(R-CH)
J301
REF
L.LIN
L.RO
REC L.RAD
R.RAD
T301
REC BIAS OSC
Q301
ISS1
66
TAPE
37
V-CLK
SURROUND
CONT
V-DATA
CD
CD-CONTROL
26–106 – 9
LIQUID CRYSTAL
DISPLAY PANEL
LCD401
SYSTEM CONTROLLER
IC802 (2/2)
7736 78
DBB
68
LINE IN
34
COM0
|
COM3
S0
|
S16
EEPROM
IC803
SCL SAD
46
MODE CHK
50
WP/INI
Q813 Q812,D807
VOL 48
KEY1
45
KEY2
44
KEY3
43
REC/PB
PRE AMP
IC301
12 3
MEGA
BASS
CONTROLLER
Q122
20
6
8R.IN
R.LIN
L.IN
9R.RO
i
A-MUTE
35
MUTE
Q124
LEVEL
DETECT
D101,201
TC-PLAY
49
M
TAPE PLAY
DETECT
Q808
24
REC
27
-1 -2
S301
(REC/PB)
REC
PB
VDD (SW)
KEY3
KEY1
KEY2
S301
(TAPE PLAY)
M301
CAPSTAN/REEL
MOTOR
17
S413-418,
S409-412,
S401-407
65
7980
AUDIO 6V
Q302
REMOTE
TU_R_OUT
TU_L_OUT
POWER AMP 2
IC305
12
8
8
3
U-COM
(VDD)
VDD (SW)
ISS2
67
Q303
Q814
KEY NETWORK
D405
OPR/BATT
VIN2 VOUT2
IC301
ELECTRONIC VOLUME
8 7
VOL AMP
LINE AMP
Q101
SURROUND
CONT
Q301
32
SP101
TWEETER
(L-CH)
SP201
TWEETER
(R-CH)
(Page 18)
14
CD_IN_R
CD_IN_L
(Page 18)
A
5759 58 56 60
R-LAT R-CLK R-DATA R-COUNT
76
RST B-MUTE
74
X1
75
X2
TUNER
X802
4.19MHz
RESET
IC804
70
XT1
71
XT2
X801
32.768kHz
3.3V
1
2
1 2 3 4
13 20 19
CE CL
DI
DO
MO/ST
XOUT
XIN
181711
LP-OUT LP-IN
PD
10
IF IN
LPF2/MO-ST
LPF1/BAND
IF-OUT
ST-IND
OSC-OUT
7
BAND
8
ST-IND
11
12
AM IN
FM IN
AM
OSC
AM
MIX
FM
MIX
FM
OSC
AM RF-IN
FM
RF-IN
FM
IF-IN
AM
IF-IN
X1
75kHz
FM/MW/LW PLL
IC2
14 17 13 18
16 15 11
12
1920
22 4 6
7
10
2
2124
T1
T2
CF4
L2
L1 CT1
RADIO 6V
RADIO 6V
D1 D2
CT3
D3
CT3,L3-1
AM
TRACKING
L4
AM FREQUENCY COVERAGE
CT1,L1
FM
TRACKING
L2
FM
FREQUENCY
COVERAGE
T2
FM
IF
T1
AM
IF
ANT1
FM
TELESCOPIC
ANTENNA
L3
AM
FERRITE-ROD
ANTENNA
IF
BUFFER
AM
DET
FM
DET
IF CUT
AF
BUFFER FM MPX MUTE
IF CUT
R-OUT
L-OUT
RADIO 6V
QUAD
FM/MW/LW FRONT-END, IF AMP,
FM MPX
IC1
L4
RADIO 6V
CF2
RADIO 6V
RADIO 6V
RADIO 6V
AM
OSC
MIX-OUT
FM
RF-OUT FM OSC
DET-OUT MPX-IN
VDD (SW)
D324

CSD-XD51
2020
CSD-XD51
6-5. PRINTED WIRING BOARD – CD SECTION – : Uses unleaded solder. •See page 17 for Circuit Boards Location.
•A: B+ Line.
•H: adjustment for repair.
•Total current is measured with no cassette installed.
•Power voltage is dc 9V and fed with regulated dc power supply
from battery terminal.
•Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tol-
erances.
•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production tol-
erances.
•Circled numbers refer to waveforms.
•Signal path.
F: FM
f: AM
E: PB
a: REC
J: CD
Common Note on Printed Wiring Boards:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•f: internal component.
•: Pattern from the side which enables seeing.
Note:
The components identified by mark 0or dotted line with mark
0are critical for safety.
Replace only with part number specified.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
Common 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 speci-
fied.
•f: internal component.
•C: panel designation.
1
A
B
C
D
E
F
G
H
I
J
2345678910
IC701
Q701
IC702
C729
C730
R730
R728
R729
C704 R708
C728
R724 R722
R725
R726
R707
C701
C726
C723
C725
C724
R719
R717 R718
R716
C720
C721
R731
R721 R720
R715 R714
C727
C711
C709
FB701
C736
C734
R709
C705
R710
R701 C703
C731
R706
R727
R712
R723
C708
R741
JC701
R744
C751
JC702
JC703
C743
C744
C742
C754
C755
C741
C707
L706
C739
C738
R732
R742
R735
R704
R733
R702
R734
R703
R746
R743
R705
R736
R747
R738
R711
R713
R737
C716
C719
C722
C717
FB702
R739
C745
C718
M702
M701
S701
C732
CNP701
X701
CNP702
JW706
JW707
JW709
JW713 JW714
JW715
JW716
JW717
JW718
JW721
JW722
JW723
JW724
JW725
JW726
JW727
JW728
JW729
C740
C750
C746
C747
JW719
C735
JW720
C733
C706
JW712
JW710
JW702
JW701
JW708
C702
JW703
JW705
JW704 JW711
JW730
JW731
JW732
(Page 24)