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CSD-XM77
SERVICE MANUAL Canadian Model
AEP Model
Ver 1.0 2004. 06
UK Model
E Model
Australian Model




Model Name Using Similar Mechanisma CSD-XD55
CD
CD Mechanism Type KSM-213RDP
Section
Optical Pick-up Name KSS-213R

TC Model Name Using Similar Mechanism CSD-XD55
Section Tape Transport Mechanism Type MF-XD55


SPECIFICATIONS
CD player section Radio section
System Compact disc digital audio system Frequency range
Laser diode properties European model
Material: GaAlAs
FM 87.5 - 108 MHz
Wave length: 780 nm
Emission duration: Continuous MW 531 - 1,611 kHz (9 kHz step)
Laser output: Less than 44.6 µW 530 - 1,610 kHz (10 kHz step)
(This output is the value measured at a distance of about LW 153 - 279 kHz
200 mm from the objective lens surface on the optical Other models
pick-up block with 7 mm aperture.)
Spindle speed FM 87.5 - 108 MHz
200 r/min (rpm) to 500 r/min (rpm) (CLV) AM 531 - 1,611 kHz (9 kHz step)
Number of channels 530 - 1,610 kHz (10 kHz step)
2
Frequency response IF FM: 10.7 MHz
20 - 20,000 Hz AM/MW/LW: 450 kHz
Wow and flutter Aerials
Below measurable limit FM: Telescopic aerial
AM/MW/LW: Built-in ferrite bar aerial


­ Continued on next page ­




CD STEREO RADIO CASSETTE RECORDER
CSD-XM77



Cassette recorder section CAUTION
Recording system Use of controls or adjustments or performance of procedures
4-track 2 channel stereo other than those specified herein may result in hazardous
Fast winding time radiation exposure.
Approx. 120 sec. with Sony cassette C-60
Frequency response Flexible Circuit Board Repairing
TYPE I (normal): 80 - 10,000 Hz · Keep the temperature of the soldering iron around 270°C during
repairing.
General · Do not touch the soldering iron on the same conductor of the
Speakers circuit board (within 3 times).
Full range: 10 cm (4 in.) dia., 3.2 , cone type (4) · Be careful not to apply force on the conductor when soldering
Tweeter: 2 cm (2) or unsoldering.
Input
LINE IN jack (stereo minijack):
Minimum input level 330 mV
Output
Headphones jack (stereo minijack):
For 16 - 68 impedance headphones Notes on Chip Component Replacement
Maximum power output · Never reuse a disconnected chip component.
20 W · Notice that the minus side of a tantalum capacitor may be
Power requirements damaged by heat.
For CD stereo radio cassette recorder:
230 V AC, 50 Hz
9 V DC, 6 R20 (size D) batteries
For remote:
3 V DC, 2 R6 (size AA) batteries NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
Power consumption OR BASE UNIT
AC 28 W The laser diode in the optical pick-up block may suffer electrostatic
Battery life breakdown because of the potential difference generated by the
For CD stereo radio cassette recorder charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also use
FM recording
the procedure in the printed matter which is included in the repair
Sony R20P: approx. 12 h parts.
Sony alkaline LR20: approx. 34 h The flexible board is easily damaged and should be handled with care.
Tape playback
NOTES ON LASER DIODE EMISSION CHECK
Sony R20P: approx. 5.5 h The laser beam on this model is concentrated so as to be focused on
Sony alkaline LR20: approx. 15.5 h the disc reflective surface by the objective lens in the optical pick-
CD playing up block. Therefore, when checking the laser diode emission,
Sony R20P: approx. 2.5 h observe from more than 30 cm away from the objective lens.
Sony alkaline LR20: approx. 10 h

Dimensions
Approx. 552 x 271 x 318 mm (w/h/d)
(21 3/4 x 10 5/8 x 12 1/2 inches) (incl. projecting parts)
Mass
Approx. 6.1 kg (13 lb. 7 oz) (incl. batteries)
Supplied accessories
Mains lead (1)
Remote control (1)

Design and specifications are subject to change without notice.




2
CSD-XM77



SAFETY-RELATED COMPONENT WARNING!! TABLE OF CONTENTS
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
1. SERVICING NOTES ................................................ 4
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS 2. GENERAL ................................................................... 5
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY. 3. DISASSEMBLY
3-1. Disassembly Flow ............................................................ 6
3-2. Cabinet (Top) Assy ........................................................... 6
ATTENTION AU COMPOSANT AYANT RAPPORT 3-3. Cabinet (Front Assy), Cabinet (Bottom) Assy ................. 7
À LA SÉCURITÉ! 3-4. Wires ................................................................................ 8
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES 3-5. MD Block ......................................................................... 9
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT 3-6. Cassette Holder ................................................................ 9
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE 3-7. Main Board ...................................................................... 10
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY 3-8. Tuner Board ...................................................................... 10
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU 3-9. Power Board, Select Board .............................................. 11
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
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


· UNLEADED SOLDER
4. MECHANICAL ADJUSTMENTS ......................... 14
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead. 5. ELECTRICAL ADJUSTMENTS .......................... 14
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.) 6. DIAGRAMS
6-1. Block Diagram ­ CD Section ­ ........................................ 17
6-2. Block Diagram ­ Main Section ­ ..................................... 18
: LEAD FREE MARK 6-3. Printed Wiring Board ­ CD Section (Side A) ­ ............... 19
Unleaded solder has the following characteristics. 6-4. Printed Wiring Board ­ CD Section (Side B) ­ ............... 20
· Unleaded solder melts at a temperature about 40°C higher than 6-5. Schematic Diagram ­ CD Section ­ ................................. 21
ordinary solder. 6-6. Printed Wiring Board
Ordinary soldering irons can be used but the iron tip has to be ­ Tuner Section(EXCEPT AEP, UK model) ­ ................ 22
applied to the solder joint for a slightly longer time. 6-7. Printed Wiring Board
Soldering irons using a temperature regulator should be set to ­ Tuner Section (AEP, UK model)­ ................................ 23
about 350°C. 6-8. Schematic Diagram ­ Tuner Section ­ ............................. 24
Caution: The printed pattern (copper foil) may peel away if 6-9. Printed Wiring Boards ­ Main Section ­ ......................... 25
the heated tip is applied for too long, so be careful! 6-10. Schematic Diagram ­ Main Section (1/2) ­ .................... 26
· Strong viscosity 6-11. Schematic Diagram ­ Main Section (2/2) ­ .................... 27
Unleaded solder is more viscous (sticky, less prone to flow) 6-12. Printed Wiring Board ­ TC Section ­ ............................. 28
than ordinary solder so use caution not to let solder bridges 6-13. Schematic Diagram ­ TC Section ­ ................................ 29
occur such as on IC pins, etc. 6-14. Printed Wiring Boards ­ Control Section ­ ..................... 30
· Usable with ordinary solder 6-15. Schematic Diagram ­ Control Section ­ ......................... 31
It is best to use only unleaded solder but unleaded solder may 6-16. Printed Wiring Boards ­ Power Supply Section ­ .......... 32
also be added to ordinary solder. 6-17. Schematic Diagram ­ Power Supply Section ­ ............... 33
6-18. Circuit Boards Location .................................................. 34
6-19. IC Block Diagrams .......................................................... 35

7. EXPLODED VIEWS
7-1. Cabinet Section ................................................................ 42
7-2. Cabinet (Front) Section-1 ................................................. 43
7-3. Cabinet (Front) Section-2 ................................................. 44
7-4. Cabinet (Top) Section ...................................................... 45
7-5. Cabinet (Bottom) Section ................................................. 46
7-6. Tape Mechanism Section ................................................. 47
7-7. CD Mechanism Section-1 ................................................ 48

8. ELECTRICAL PARTS LIST .................................. 49




3
CSD-XM77
SECTION 1
SERVICING NOTES
CHUCK PLATE JIG ON REPAIRING LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
On repairing CD section, playing a disc without the lid (CD), use 1. Turn ON the[OPERATE]button and press[CD] button to CD
Chuck Plate Jig. position.
· Code number of Chuck Plate Jig: X-4918-255-1 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




4
CSD-XM77
SECTION 2
GENERAL This section is extracted
from instruction manual.



Location of controls
Loading a CD Remote Control
Inserting a cassette

With the side you want
to play facing you ZPUSH
SLEEP
POWER
OPEN/CLOSE FUNCTION SLEEP
FUNCTION POWER
CD/RADIO (AC ONLY)

1 2 3

Number buttons 4 5 6

7 8 9
With the labeled side up MODE

MODE 0/10 10


PAUSE STOP/EJECT FF REW PLAY REC
VOL
VOL +*,­
CD, RADIO BAND/ .,>
CD
AUTO PRESET, TAPE N x
RADIO TUNE
OPR/BATT Display BAND
LINE IN X TUNE ­,+
MODE POWER Remote sensor SURROUND S-BASS

BAND
u i ZPUSH OPEN/CLOSE x S-BASS
SURROUND S-BASS




*The button has a tactile dot.




VOLUME ­,+*
LINE SLEEP
DISPLAY/ENTER/MEMORY SURROUND
.,>
PRESET ­,+
TUNE ­,+
Display
E F
Total track number Total playing time Programmed track Playing order




5
CSD-XM77
SECTION 3
DISASSEMBLY
· The equipment can be removed using the following procedure.
3-1. DISASSEMBLY FLOW
SET


3-2 CABINET (TOP) ASSY
(Page 6)


3-3. CABINET (FRONT) ASSY, 3-10. CD LID 3-11. CD BLOCK ASSY
CABINET (BOTTOM) ASSY (Page 11) (Page 12)
(Page 7)
3-12. OPTICAL PICK-UP
3-4. WIRES (Page 12)
(Page 8)


3-5. MD BLOCK 3-7. MAIN BOARD 3-8. TUNER BOARD 3-9. POWER BOARD,
(Page 9) (Page 10) (Page 10) SELECT BOARD
(E4 model)
(Page 11)



3-6. CASSETTE HOLDER 3-13. R/P HEAD (HRP301), 3-14. MAIN BELT (B),
(Page 9) TC BOARD SUB BELT (B)
(Page 13) MOTOR ASSY (M301),
(Page 13)
Note : Follow the disassembly procedure in the numerical order given.

3-2. CABINET (TOP) ASSY 3 two screws
4 two screws (+BV (B3))
(+BV (B3))



6 screw (+BV (B3))

2 screw
(+BV (B3))



5 screw (+BV (B3))


1 two screws
qa connector (+BV (B3))
(CNP302) 7
9 qs cabinet (top) assy
q; connector CNP702
(CNP809)

8 connector
(CNJ807)




6
CSD-XM77



3-3. CABINET(FRONT)ASSY, CABINET(BOTTOM)ASSY




0 connector
(CNP305)
9 CNP805
6 two screws
(+BV (B3))
7 three screws
(+BV (B3))
5 screw
(+BV (B3))
4 screw
(+BV (B3))




3 two screws
(+BV (B3))
qa connector
(CNP806)
cabinet (bottom) assy



qs CNP808
qd CNP801
2 three screws
(+BV (B3))




8 three screws
(+BV (B3))


1 battery lid

qf cabinet (front) assy




7
CSD-XM77



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.




from MAIN board




cabinet front




A G



B C D E F




cabinet bottom




H I




8
CSD-XM77



3-5. MD BLOCK



2 two screws
(+BV (B3))



4 MD block




3 two screws
(+BV (B3))




1
cassette holder




3-6. CASSETTE HOLDER




2 damper



1 screw
(+BV (B3))




4 cassette spring



3 cassette holder




9
CSD-XM77



3-7. MAIN BOARD
4 two screws
3 connector (+BV (B3))
(CNP304)

5 screw 2 connector
(+BV (B3)) (CNP811)


7 MAIN board
1 connector
(CNP810)



6 screw
(+BV (B3))




3-8. TUNER BOARD



2 telescopic antenna




1 screws
(+P (M3))




3 screws
(+BV (B3))




5



4 two claws 6 TUNER board


10
CSD-XM77



3-9. POWER BOARD, SELECT BOARD


2 connector
(CNP903)
1 connector
(CNP904)




E4 model
7 connector
(CNP906)




3 two screws
(+BV (B3))
9 SELECT board
4 two screws
(+BV (B3))
8 screw
5 screw 6 POWER board (+BV (B3))
(+BV (B3))
E4 model




3-10. CD LID



2 projection

3 CD lid




1 projection




CD spring




11
CSD-XM77



3-11. CD BLOCK ASSY




3 CD cover


two claws
two claws




4 CD block assy



2 two screws
(+PWH 2.6 x 10) 1 two screws
(+PWH 2.6 x 10)




3-12. OPTICAL PICK-UP

6 optical pick-up




5 sled shaft
claw

1 gear (A)
4
2 screw
(PWB tapping (M2))

3 screw
(PWB tapping (M2))




12
CSD-XM77



3-13. R/P HEAD(HRP301),TC BOARD




1 two claws 6 Remove the four solderings.

3 screw
(+BVTT 2 x 4)




4 lug




5
7 TC board




2 R/P head (HRP301)




3-14. MAIN BELT, RF BELT, MOTER ASSY(M301)



7 motor assy (M301)
8 motor bracket

4 main belt




3
1 screw
(bind DT M2 x 6)

2 screw
(bind DT M2 x 6)

6 two screws
(pan M2.6 x 4.5)


5 RF belt




13
CSD-XM77
SECTION 4 SECTION 5
MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS
PRECAUTION TAPE SECTION 0 dB = 0.775 V
1. Clean the following parts with a denatured-alcohol-moistened
swab : · Standard Output Level
record/playback head pinch roller
Output terminal HP OUT
erase head rubber belts
load impedance 32
capstan idlers
2. Demagnetize the record/playback head with a head output signal level 0.25 V (­10 dB)
demagnetizer. (Do not bring the head magnetizer close to the
erase head.) · Test Tape
3. Do not use a magnetized screwdriver for the adjustments. Type Signal Used for
4. The adjustments should be performed with the rated power WS-48A 3 kHz, 0 dB tape speed adjustment
supply voltage (9V) unless otherwise noted.
Tape Speed Adjustment
Torque Measurement Procedure:
Mode Torque meter Meter reading Mode: playback
2.95 ­ 6.86 mN · m Adjust so that the value on the digital frequency counter is
FWD CQ-102C (30 ­ 70 g · cm) 3,000 Hz.
(0.42 ­ 0.97 oz · inch)
0.15 ­ 0.53 mN · m
FWD CQ-102C (1.5 ­ 5.5 g · cm)
Back Tension
(0.021 ­ 0.076 oz · inch) digital frequency
test tape counter
more than 5.88 mN · m WS-48A
FF CQ-201B (more than 60 g · cm) (3 kHz, 0 dB)
(more than 0.83 oz · inch) 32
more than 5.88 mN · m
REW CQ-201B (more than 60 g · cm) set
(more than 0.83 oz · inch)
i jack (J321)
Tape Tension Measurement Specification Value:
Mode Tension meter Meter Reading Digital frequency counter
more than 100 g 2,940 to 3,060 Hz
FWD CQ-403A
(more than 3.53 oz)
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:




Tape speed adjustment
control inside motor




14
CSD-XM77

no mark : CND, MX, E4, SP, AUS < >:AEP, UK
TUNER SECTION 0 dB = 1 µV · AEP, UK model
MW IF ADJUSTMENT
· AM Section
Adjust for a maximum reading on level meter.
Setting:
T1
RADIO BAND·AUTO PRESET button: AM
450 kHz
AM RF signal
generator
MW FREQUENCY COVERAGE
Put the lead-wire
antenna close to CHECK
the set. Frequency Display 531 kHz 1,611 kHz
Reading on Digital voltmeter 1.0 ± 0.5 V 5.2 ± 0.6 V
Adjustment Part
30% amplitude
modulation by
400 Hz signal MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3-1 CT3
· FM Section 621 kHz 1,404 kHz
Setting:
RADIO BAND·AUTO PRESET button: FM LW FREQUENCY COVERAGE
ADJUSTMENT
FM RF signal Frequency Display 153 kHz 279 kHz
generator Reading on Digital voltmeter 0.6 ± 0.3 V 5.0 ± 0.1 V
TP (FM IN) Adjustment Part L4

0.01 µF
LW TRACKING ADJUSTMENT
set
Adjust for a maximum reading on level meter.
L3-2 CT5
75 kHz frequency 162 kHz 261 kHz
deviation by 1 kHz signal · CND, MX, E4, SP, AUS model
output level : as low as possible AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
· Connecting Level Meter (FM, AM) 450 kHz

level meter
AM FREQUENCY COVERAGE
(range: 0.5­5 V ac)
ADJUSTMENT
32
Frequency Display 530 kHz 1,710 kHz
Reading on Digital voltmeter 1.0 ± 0.05 V 5.3 ± 0.7 V
set
Adjustment Part L4

i jack (J321)
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
· Connecting Digital Voltmeter (FM, AM ) L3-2 CT3
620 kHz 1,400 kHz
digital · FM section (common)
voltmeter
FM IF ADJUSTMENT
100 k Adjust for a maximum reading on level meter.
TP (VT) T2
10.7 MHz


· Repeat the procedures in each adjustment several times, and the FM FREQUENCY COVERAGE
ADJUSTMENT
frequency coverage and tracking adjustments should be finally
Frequency Display 87.5 MHz 108 MHz
done by the trimmer capacitors.
Reading on Digital voltmeter 1.3 ± 0.3 V 3.0 ± 0.2 V
· Abbreviation Adjustment Part L2
CND : Canadian model
SP : Singapore model
FM TRACKING ADJUSTMENT
MX : Mexican model
E4 : AC200-240V area in E model Adjust for a maximum reading on level meter.
AUS : Australian model L1 CT1
87.5 MHz 108 MHz
Adjustment Location: See page 16.

15
CSD-XM77


Adjustment Location:

CT3,L3-2 CT5, L3-2
AM LW
TRACKING TRACKING
ADJUSTMENT ADJUSTMENT
­ TUNER board (component side) ­


L3-2 L3-1



L1 CT1 CT1, L1
FM TP (VT)
TP (FM IN) TRACKING (CONDUCTOR SIDE)
(CONDUCTOR SIDE) CT5
ADJUSTMENT
CT3
T1 T1
AM L2
IF
ADJUSTMENT L4 L4
AM CT3, L3-1
FREQUENCY MW
COVERAGE TRACKING
IC1
ADJUSTMENT ADJUSTMENT
T2 T2 IC2
FM
IF
ADJUSTMENT L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT




CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.

FOCUS BIAS CHECK Test Point:
1. Connect the oscilloscope between IC701 pin 4 and pin qa -- CD/MP3 board (side B) --
R745




(or TP (RF) and TP (VREF)).
R755




R723




2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01) C7
3. Press the N X (CD) button. C761 R
C763
C744




4. Confirm that the oscilloscope waveform is as shown in the
C743




R73
figure below. (eye pattern)
C762




R73
R725




A good eye pattern means that the diamond shape ( ) in the R724
center of the waveform can be clearly distinguished.
R726




R764
R763 C742
· RF signal reference waveform (eye pattern) C708
C746
C710




R727
Q701




C709




VOLT/DIV : 50 mV (10 : 1 probe in use) C705
TIME/DIV : 500 nS R708 R711 R730
IC




R728
70
1




R710 R729
C713
R759 C714
C707
RF level :
0.85 ± 0.2 Vp-p
R709
C711
C712




C740
C706




C701




C717 C721
C719
When observing the eye pattern, set the oscilloscope for AC range
C715




TP TP
C716




and raise vertical sensitivity.
(RF) (VREF)
C718 C720



16
CSD-XM77
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM -- CD SECTION --



LCHO MAIN
SLICE ERROR
INTERPOLATION
MUTE
8FS
DIGITAL
42 CD L CH A SECTION
A A FIN2 RF EFMIN LPF (page 18)
8 4 3 LEVEL CORRECTION & FILTER
CONTROL AUDIO CD ATTENUATION & RCHO
45 R-CH
C C DEEMPHASIS 1-bit DAC
PH/BH
DATA
B B FIN1 60 79 DATA IN
7 CLV,CAV SERIAL DATACK
OUT 59 80 DATACK
CONTROL LRSY
D D 58 1 LRSY
AGC
ASDFIN
HFL 57 2 ADDATA
EXTERNAL ASDACK
PH(RFENV) A/D 56 3 ADBCK
E E TIN1 AUDIO IN ASLRCK
9 CONVERTER, 55 4 ADLRCK
FE SERVO SWITCH
F F TIN2 TE PROCESSOR CF2
10 52 5 CF2IN
VREF FSX/16MIN