Sony MDX-C6500X User manual

1
Model Name Using Similar Mechanism NEW
Mini Disc Mechanism Type MG-164NZ-138
Optical Pick-up Name KMS-241C/J1NP
SERVICE MANUAL
US Model
Canadian Model
E Model
MDX-C6500X
FM/AM MINIDISC PLAYER
MICROFILM
• The tuner and MD sections have no adjustments.
AUDIO POWER SPECIFICATIONS (US Model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
19 watts per channel minimum continuous average power into
4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more
than 1% total harmonic distortion.
Other Specifications
MD player section
Signal-to-noise ratio 90 dB
Frequency response 10 – 20,000 Hz
Wow and flutter Below measurable limit
Laser Diode Properties
Material GaAlAs
Wavelength 780 nm
Emission Duration Continuous
Laser output power Less than 44.6 µW*
*This output is the value measured at a distance
of 200 mm from the objective lens surface on the
Optical Pick-up Block.
Tuner section
FM
Tuning range US, Canadian model:
87.5 – 107.9 MHz
E model:
FM tuning interval:
50 kHz/200 kHz switchable
87.5 – 108 MHz
(at 50 kHz step)
87.5 – 107.9 MHz
(at 200 kHz step)
Antenna terminal External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Usable sensitivity 8 dBf
Selectivity 75 dB at 400 kHz
Signal-to-noise ratio 66 dB (stereo),
72 dB (mono)
SPECIFICATIONS
Harmonic distortion at 1 kHz
0.6% (stereo),
0.3% (mono)
Separation 35 dB at 1 kHz
Frequency response 30 – 15,000 Hz
AM
Tuning range US, Canadian model:
530 – 1,710 kHz
E model:
AM tuning interval:
9 kHz/10 kHz switchable
531 – 1,602 kHz
(at 9 kHz step)
530 – 1,710 kHz
(at 10 kHz step)
Antenna terminal External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity 30 µV
– Continued on next page –
Dolby noise reduction extension manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol ;are trademarks of Dolby
Laboratories Licensing Corporation.

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laser-tap
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES
SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT.
NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES
SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL
OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
Notes on Chip Component Replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
Power amplifier section
Outputs Speaker outputs
(sure seal connectors)
Speaker impedance 4 – 8 ohms
Maximum power output 50 W ×4 (at 4 ohms)
General
Outputs Audio outputs
Power antenna relay
control lead
Power amplifier control
lead
Telephone ATT control
lead
Tone controls Bass ±9 dB at 100 Hz
Treble ±9 dB at 10 kHz
Power requirements 12 V DC car battery
(negative ground)
Dimensions Approx. 178 ×50 ×183 mm
(7 1/8 ×2 ×7 1/4 in.)
(w/h/d)
Mounting dimensions Approx. 182 ×53 ×162 mm
(7 1/4 ×2 1/8 ×6 1/2 in.)
(w/h/d)
Mass Approx. 1.2 kg (2 lb. 10 oz.)
Supplied accessories Parts for installation and
connections (1 set)
Front panel case (1)
Design and specifications are subject to change without
notice.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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.
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
Never look into the laser diode emission from right avove when
checking it for adustment. It is feared that you will lose your sight.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
(KMS-241C/J1NP)
The laser diode in the optical pick-up block may suffer electrostatic
break-down easily. When handling it, perform soldering bridge to
the laser-tap on the flexible board. Also perform m easures against
electrostatic break-down sufficiently before the operation. The flex-
ible board is easily damaged and should be handled with care.
OPTICAL PICK-UP FLEXIBLE BOARD
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

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TABLE OF CONTENTS
1. GENERAL
Location of Controls................................................................4
Getting Started ......................................................................... 4
Setting the Clock ..................................................................... 4
MD Player CD/MD Unit (optional) ........................................5
Radio ....................................................................................... 6
Other Functions ....................................................................... 7
TV/Video (optional) ................................................................ 8
Additional Information ............................................................ 8
Connections ........................................................................... 10
2. DISASSEMBLY
2-1. Sub Panel (MD) Assy........................................................ 12
2-2. MD Mechanism Block ...................................................... 12
2-3. Main Board ....................................................................... 13
2-4. Heat Sink........................................................................... 13
2-5. Servo Board....................................................................... 14
2-6. MD Cover Assy................................................................. 14
2-7. Float Block ........................................................................ 15
2-8. Lo Motor Assy (Loading) (M903) .................................... 15
2-9. Lever Assy (LE) ................................................................ 16
2-10. Holder Assy....................................................................... 16
2-11. Chucking Arm Assy .......................................................... 17
2-12. Optical Pick-up (KMS-241C/J1RP) ................................. 17
2-13. SL Motor Assy (Sled) (M902)
/SP Motor Assy (Spindle) (M901) .................................... 18
3. DIAGRAMS
3-1. IC Pin Descriptions ........................................................... 19
3-2. Block Diagram –MD Section–.......................................... 27
3-3. Block Diagram –Tuner Section– ....................................... 28
3-4. Block Diagram –Display Section–.................................... 29
3-5. Circuit Boards Location .................................................... 29
3-6. Printed Wiring Board –MD Mechanism Section– ............ 31
3-7. Schematic Diagram –MD Mechanism Section (1/2)– ...... 32
3-8. Schematic Diagram –MD Mechanism Section (2/2)– ...... 33
3-9. Schematic Diagram –Main Section (1/2)– ........................ 34
3-10. Schematic Diagram –Main Section (2/2)– ........................ 35
3-11. Printed Wiring Board –Main Section– ..............................36
3-12. Printed Wiring Board –Relay Section– ............................. 37
3-13. Schematic Diagram –Relay Section–................................ 38
3-14. Schematic Diagram –Display Section–............................. 39
3-15. Printed Wiring Board –Display Section– ..........................40
3-16. IC Block Diagrams............................................................ 41
4. EXPLODED VIEWS
4-1. Chassis Section ................................................................. 46
4-2. Front Panel Section ........................................................... 47
4-3. MD Mechanism Section (1) .............................................. 48
4-4. MD Mechanism Section (2) .............................................. 49
5. ELECTRICAL PARTS LIST ........................................ 50

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SECTION 1
GENERAL This section is extracted from
US, Canadian model’s instruction manual.

5

6

7

8

9

10

11

12
4CN701
5MD mechanism block
7bracket (MD)
3
6PTT 2.6x6
1PTT 2.6x
6
2PTT 2.6x6
2-2. MD MECHANISM BLOCK
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. SUB PANEL (MD) ASSY
1PTT 2.6x6
2PTT 2.6x6
4two claws
3claw
6sub panel (MD) assy
5CNP800

13
2-3. MAIN BOARD
2-4. HEAT SINK
4PTT 2.6x6
5PTT 2.6x6
1PTT 2.6x8
6MAIN board
3PTT 2.6x
8
2PTT 2.6x8
7heat sink
1PTT 2.6x8
2PTT 2.6x8
4PTT 2.6x8
5PTT 2.6x8
3PTT 2.6x12
6PTT 2.6x8

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2-6. MD COVER ASSY
2-5. SERVO BOARD
3BVTT2x4
4BVTT2x4
5SERVO board
1CN103
2CN102
1B2 x
3
3MD cover assy
2Pushing the cassette holder in the arrow Adirection with a screwdriver,
disengage the shaft (MD cover guide) from the groove of MD cover ass’y.
Note : Be careful not to damage the optical pick-up
when pushing the cassette holder with a screwdriver.
shaft (MD cover guide)
cassette holder
A

15
2-7. FLOAT BLOCK
2-8. LO MOTOR ASSY (LOADING) (M903)
2spring (float B) 6float block
1spring (float B
)
3two springs (float F)
4Pushing the arrow Apart,
raise the float block upward at the front to unlock.
A
5
float block
lever (lock R)
lever (lock L)
4Remove the bracket (LO)
in the direction of the arrow A.
1Remove solder of the motor (M903). 5LO motor assy (loading) (M903
)
2spring (rack)
3claw
A

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2-9. LEVER ASSY (LE)
2-10. HOLDER ASSY
2stopper washer
3lever ass’y (LE)
4roller (gear E)
1
7stop ring E (1.5)
2stop ring E (1.5)
3lever (lock L)
5stop ring E (1.5)
8stop ring E (1.5)
9
0holder assy
1spring (CHKG)
4spring (CHKG)
6lever (lock R)

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2-11. CHUCKING ARM ASSY
2-12. OPTICAL PICK-UP (KMS-241C/J1RP)
2chucking arm assy
1
holder assy
6bearing (SL)
5feed screw ass
y
3K2 x 3
2shaft (OPTL)
1K2 x 3
7optical pick-up
(KMS-241C/J1RP)
4B2 x 3

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2-13. SL MOTOR ASSY (SLED) (M902)/SP MOTOR ASSY (SPINDLE) (M901)
4P1.7 x 1.8
5bracket (SL)
9P1.7 x 1.8
0bracket (SP)
qa SP motor assy
(spindle) (M901)
7B2 x 3
2PSW2 x 8
3SENSOR board
1Remove solders
of motors (M901, 902).
8base (SL)
6SL motor ass’y
(sled) (M902)

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3-1. IC PIN DESCRIPTIONS
•SERVO BOARD IC301 CXD2652AR
(DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO PROCESSOR, EFM/ACIRC ENCODER/DECODER,
SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER, 2M BIT D-RAM)
Pin No. Pin Name I/O Pin Description
1 MNT0 O Focus OK signal output to the MD mechanism controller (IC501)
“H”is output when focus is on (“L”: NG)
2 MNT1 O Track jump detection signal output to the MD mechanism controller (IC501)
3 MNT2 O Busy monitor signal output to the MD mechanism controller (IC501)
4 MNT3 O Spindle servo lock status monitor signal output to the MD mechanism controller (IC501)
5 SWDT I Writing serial data signal input from the MD mechanism controller (IC501)
6 SCLK I Serial data transfer clock signal input from the MD mechanism controller (IC501)
7 XLAT I Serial data latch pulse signal input from the MD mechanism controller (IC501)
8 SRDT O (3) Reading serial data signal output to the MD mechanism controller (IC501)
9 SENS O (3) Internal status (SENSE) output to the MD mechanism controller (IC501)
10 XRST I Reset signal input from the MD mechanism controller (IC501) “L”: reset
11 SQSY O Subcode Q sync (SCOR) output to the MD mechanism controller (IC501)
“L”is output every 13.3 msec Almost all, “H”is output
12 DQSY O Digital In U-bit CD format subcode Q sync (SCOR) output terminal
“L”is output every 13.3 msec Almost all, “H”is output Not used (open)
13 RECP I Laser power selection signal input terminal
“L”: playback mode, “H”: recording mode (fixed at “L”in this set)
14 XINT O Interrupt status output to the MD mechanism controller (IC501)
Recording data output enable signal input terminal
15 TX I Writing data transmission timing input (Also serves as the magnetic head on/off output)
Not used (fixed at “L”)
16 OSCI I System clock signal (512Fs=22.5792 MHz) input
17 OSCO O System clock signal (512Fs=22.5792 MHz) output terminal Not used (open)
18 XTSL I Input terminal for the system clock frequency setting
“L”: 45.1584 MHz, “H”: 22.5792 MHz (fixed at “H”in this set)
19 RVDD —Power supply terminal (+3.3 V) (digital system)
20 RVSS —Ground terminal (digital system)
21 DIN I Digital audio signal input terminal when recording mode Not used (fixed at “L”)
22 DOUT O Digital audio signal output terminal when playback mode Not used (open)
23 ADDT I Recording data input terminal Not used (fixed at “L”)
24 DADT O Playback data output
25 LRCK O L/R sampling clock signal (44.1 kHz) output
26 XBCK O Bit clock signal (2.8224 MHz) output
27 FS256 O Clock signal (11.2896 MHz) output terminal
28 DVDD —Power supply terminal (+3.3V) (digital system)
29 –32 A03 to A00 O Address signal output to the D-RAM (IC307)
33 A10 O Address signal output to the external D-RAM Not used (open)
34 –38 A04 to A08 O Address signal output to the D-RAM (IC307)
39 A11 O Address signal output to the external D-RAM Not used (open)
40 DVSS —Ground terminal (digital system)
41 XOE O Output enable signal output to the D-RAM (IC307) “L”active
42 XCAS O Column address strobe signal output to the D-RAM (IC307) “L”active
43 A09 O Address signal output to the D-RAM (IC307)
44 XRAS O Row address strobe signal output to the D-RAM (IC307) “L”active
45 XWE O Write enable signal output to the D-RAM (IC307) “L”active
SECTION 3
DIAGRAMS

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Pin No. Pin Name I/O Pin Description
46 D1 I/O
47 D0 I/O Two-way data bus with the D-RAM (IC307)
48 D2 I/O
49 D3 I/O
50 MVCI I Digital in PLL oscillation input from the external VCO Not used (fixed at “L”)
51 ASYO O Playback EFM full-swing output terminal
52 ASYI I (A) Playback EFM asymmetry comparator voltage input terminal
53 AVDD —Power supply terminal (+3.3 V) (analog system)
54 BIAS I (A) Playback EFM asymmetry circuit constant current input terminal
55 RFI I (A) Playback EFM RF signal input from the CXA2523AR (IC302)
56 AVSS —Ground terminal (analog system)
57 PDO O (3) Phase comparison output for clock playback analog PLL of the playback EFM
Not used (open)
58 PCO O (3) Phase comparison output for master clock of the recording/playback EFM master PLL
59 FILI I (A) Filter input for master clock of the recording/playback master PLL
60 FILO O (A) Filter output for master clock of the recording/playback master PLL
61 CLTV I (A) Internal VCO control voltage input of the recording/playback master PLL
62 PEAK I (A) Light amount signal (RF/ABCD) peak hold input from the CXA2523AR (IC302)
63 BOTM I (A) Light amount signal (RF/ABCD) bottom hold input from the CXA2523AR (IC302)
64 ABCD I (A) Light amount signal (ABCD) input from the CXA2523AR (IC302)
65 FE I (A) Focus error signal input from the CXA2523AR (IC302)
66 AUX1 I (A) Auxiliary signal (I3 signal/temperature signal) input terminal Not used (fixed at “H”)
67 VC I (A) Middle point voltage (+1.65V) input from the CXA2523AR (IC302)
68 ADIO O (A) Monitor output of the A/D converter input signal Not used (open)
69 AVDD —Power supply terminal (+3.3 V) (analog system)
70 ADRT I (A) A/D converter operational range upper limit voltage input terminal
(fixed at “H”in this set)
71 ADRB I (A) A/D converter operational range lower limit voltage input terminal
(fixed at “L”in this set)
72 AVSS —Ground terminal (analog system)
73 SE I (A) Sled error signal input from the CXA2523AR (IC302)
74 TE I (A) Tracking error signal input from the CXA2523AR (IC302)
75 AUX2 I (A) Auxiliary signal input terminal Light amount signal input from the CXA2523AR (IC302)
76 DCHG I (A) Connected to the +3.3 V power supply
77 APC I (A) Error signal input for the laser automatic power control Not used (fixed at “L”)
78 ADFG I ADIP duplex FM signal (22.05 kHz ± 1 kHz) input from the CXA2523AR (IC302)
79 F0CNT O Filter f0 control signal output terminal Not used (open)
80 XLRF O Serial data latch pulse signal output terminal Not used (open)
81 CKRF O Serial data transfer clock signal output terminal Not used (open)
82 DTRF O Writing serial data output terminal Not used (open)
83 APCREF O Control signal output to the reference voltage generator circuit for the laser
automatic power control
84 LDDR O PWM signal output for the laser automatic power control Not used (open)
85 TRDR O Tracking servo drive PWM signal (–) output to the BH6511FS (IC303)
86 TFDR O Tracking servo drive PWM signal (+) output to the BH6511FS (IC303)
87 DVDD —Power supply terminal (+3.3V) (digital system)
88 FFDR O Focus servo drive PWM signal (+) output to the BH6511FS (IC303)
89 FRDR O Focus servo drive PWM signal (–) output to the BH6511FS (IC303)
90 FS4 O Clock signal (176.4 kHz) output terminal (X’tal system) Not used (open)