Service manual

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SERVICE MANUAL

COMPACT DISC DECK RECEIVER

AEP Model

UK Model

E Model

Australian Model

CX-JT8

Ver 1.0 2003.04

9-877-255-01 Sony Corporation

2003D0500-1 Home Audio Company

C 2003.04 Published by Sony Engineering Corporation

SPECIFICATIONS

CX-JT8 is the tumer, amplifier, casette deck and

CD player section in JAX-T8 and JAX-PK8.

TUNER

FM tuning range 87.5 MHz to 108 MHz

FM usable sensitivity (IHF) 16.8 dBf

FM antenna terminal 75 ohms (unbalanced)

AM tuning range 531 kHz to 1602 kHz

AM usable sensitivity 350 µV/m

AM antenna Loop antenna

AMPLIFIER

Power output Front:

Rated:

144 W + 144 W (6 ohms,

T.H.D. 1 %, 1 kHz/DIN 45500)

Reference: 180 W + 180 W (6 ohms,

T.H.D. 10 %, 1 kHz/DIN 45324)

MUSIC POWER: 320 W + 320 W

Front and Surround:

125 W + 55 W (6 ohms, T.H.D.

10 %, 1 kHz/DIN AUDIO)

Total harmonic distortion 0.08 % (90 W, 1 kHz, 6 ohms, DIN

AUDIO)

Input

MD (VIDEO): 1.5 V

Outputs SPEAKERS: 6 ohms or more

PHONES: 32 ohms or more

CASSETTE DECK

Track format 4 tracks, 2 channels stereo

Frequency response

50 Hz – 8 kHz

Recording system AC bias

Heads Deck A: playback x 1

Deck B: recording/playback x 1,

erase x 1

CD PLAYER

Laser Semiconductor laser

(λ = 780 nm)

Emission duration:

continuous

D/A converter 1 bit dual

Signal-to-noise ratio 85 dB (1 kHz, 0 dB)

Harmonic distortion 0.05 % (1 kHz, 0 dB)

GENERAL

Power requirements 230 V AC, 50/60 Hz

Power consumption 210 W

Power consumption With ECO mode on: 0.25 W

in standby mode With ECO mode off: 24 W

Dimensions (W

H x D) 280 x 328 x 437 mm

Weight 10.3 kg

Specifications and external appearance are subject to

change without notice.

Check copyright laws relevant to recordings from discs,

or tape for the country where the unit is to be used.

Licensed by BBE Sound, Inc. under USP4638258, 5510752

and 5736897.

(AEP, UK, CIS, E, SP, AUS)

280 x 328 x 446 mm (E51)

• Abbreviation

AUS : Australian model

E51 : Chilean and Peruvian models

SP : Singapore model

Model Name Using Similar Mechanism NEW

CD Mechanism Type CDM74F-K6BD71A

Section

Base Unit Name BU-K6BD71A

Optical Block Name KSM-213DCP

Optical Pick-up Name KSS-213D

Tape deck

Model Name Using Similar Mechanism NEW

Section

Tape Transport Mechanism Type CWM43RR23

Summary of content (90 pages)

PAGE 1
CX-JT8 SERVICE MANUAL AEP Model UK Model E Model Australian Model Ver 1.0 2003.04 CX-JT8 is the tumer, amplifier, casette deck and CD player section in JAX-T8 and JAX-PK8.
PAGE 2
CX-JT8 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 the soldering iron around 270 ˚C during repairing. • Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). • Be careful not to apply force on the conductor when soldering or unsoldering.
PAGE 3
CX-JT8 TABLE OF CONTENTS 1. 2. SERVICING NOTES ................................................ 4 GENERAL Location of Controls ....................................................... 7 3. DISASSEMBLY 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10. 3-11. 3-12 3-13. 3-14. 3-15. 3-16. 3-17. Disassembly Flow ........................................................... Case (SIDE-L/R) ............................................................. Case (Top) ................................................
PAGE 4
CX-JT8 SECTION 1 SERVICING NOTES NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT • MODEL IDENTIFICATION – Back Panel – 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.
PAGE 5
CX-JT8 HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF. 1 Remove the case (side-L). 2 Turn the loading gear in the direction of arrow A. A 3 Pull-out the disc tray.
PAGE 6
CX-JT8 SERVICE POSITION – CD mechanism deck – main board (CN312) BD board (CN710) Connect wire (flat type) (19 core) to main board (CN312) and BD board (CN710). – Tape mechanism deck – panel board (CN601) Connect wire (flat type) (13 core) to panel board (CN601) and mechanical deck.
PAGE 7
CX-JT8 SECTION 2 GENERAL This section is extracted from instruction manual. • LOCATION OF CONTROLS Main unit: front Refer to the pages indicated in parentheses for details. 4 TREBLE/MIDDLE Enhances high or middle frequency sound. @ VOLUME Adjusts the volume. 5 CD SYNC Starts Automatic CD dubbing. # BASS Adjusts low frequency sound. REC PAUSE/START Starts recording. 6 PHONES jack Plug in here an optional headphones set with a mini stereo plug (ø3.5 mm). Speaker output is canceled.
PAGE 8
CX-JT8 Remote control Refer to the pages indicated in parentheses for details. 3 En 4 Buttons with the same or similar names with the main unit basically have the same function. 5 1 POWER 2 1-0/10, +10 Selects a CD track of the specified number . The numbered buttons take on these functions below 6 when pressed together with SHIFT : held down EDIT Enters Automatic CD dubbing mode when pressed in stop mode. BAND Selects Tuner function and the radio band.
PAGE 9
CX-JT8 SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. 3-1. DISASSEMBLY FLOW Note 1: The process described in can be performed in any order. Note 2: Without completing the process described in , the next process can not be performed. Set 3-2. CASE (SIDE-L/R) (Page 10) 3-3. CASE (TOP) (Page 10) 3-4. TRAY PANEL (Page 11) 3-5. CD MECHANISM DECK (CDM74F-K6BD71A) (Page 11) 3-6. FRONT PANEL SECTION (Page 12) 3-8. REAR CABINET SECTION (Page 13) 3-7.
PAGE 10
CX-JT8 Note: Follow the disassembly procedure in the numerical order given. 3-2. CASE (SIDE-L/R) 6 two screws (BVTP3 × 10) 0 case (side-L) 1 two screws (BVTP3 × 10) 8 9 7 three screws (case3 TP2) 3 5 case (side-R) 4 2 three screws (case3 TP2) 3-3.
PAGE 11
CX-JT8 3-4. TRAY PANEL 1 Turn the loading gear in the direction of arrow A. A 2 Pull-out the disc table. 3 four claws 4 tray panel 3-5.
PAGE 12
CX-JT8 3-6. FRONT PANEL SECTION 4 connector (CN203) 3 connector (CN202) 5 wire (flat type) (9 core) (CN311) 2 connector (CN310) 1 wire (flat type) (31 core) (CN304) 7 front panel section 6 three screws (BVTP3 × 10) 3-7.
PAGE 13
CX-JT8 3-8. REAR CABINET SECTION 3 two screws (BVTP3 × 10) 4 cover (duct) 5 five screws (BVTP3 × 10) 1 wire (flat type) (11core: except AEP, UK) (15core: AEP, UK) 6 rear cabinet section 2 connector (CN303) 3-9.
PAGE 14
CX-JT8 3-10. POWER BOARD 3 two screws (BVIT3B-8R W/O SLOT) 2 two screws (BVIT3B-8R W/O SLOT) 1 connector (CN902) 4 power board 3-11.
PAGE 15
CX-JT8 3-12. TABLE ASSY 5 two claws A 4 hook 3 wire (flat type) (5 core) (CN702) 1 Turn the loading gear in the direction of arrow A. 2 Pull-out the table assy. 6 table assy 3-13. MOTOR (TB) BOARD 1 screw (PTPWH M2.6) 2 table (loading) 3 belt (table) 6 motor (TB) board 4 connector (CN731) 5 two screws (BTTP M2.
PAGE 16
CX-JT8 3-14. MOTOR (LD) BOARD 3 two screws (BTTP M2.6) 4 motor (LD) board 2 connector (CN704) 1 belt (loading) 3-15. BASE UNIT (BU-K6BD71A) 7 base unit (BU-K6BD71A) 6 two insulators 6 two insulators 5 two coil springs (insulator) 4 two stoppers (BU) 2 two coil springs (insulator) 3 two screws (BTTP M2.6) 16 1 two screws (PTPWH M2.
PAGE 17
CX-JT8 3-16. MOTOR GEAR ASSY (SLED) (M701), BD BOARD 7 gear (A) 6 claw 8 gear (B) 2 two screws (P2 × 3) 5 wire (flat type) (16 core) (CN708) qa BD board 0 motor gear assy (SLED) (M701) 1 Remove two solders. 3 screw (P2.6 × 6) 4 9 Remove two solders. 3-17. OPTICAL PICK-UP (KSS-213D) 3 Remove the optical pick-up (KSS-213D) in the direction of arrow B. B 2 sled shaft A 1 Slide the lever in the direction of arrow A.
PAGE 18
CX-JT8 SECTION 4 TEST MODE [COLD RESET] [CD TRAY LOCK MODE] • The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer. Procedure: 1. Press the [POWER] key to turn the power ON. 2. Press three keys of x , [ENTER] and [POWER] simultaneously. 3. The message “RESET” is displayed on the fluorescent indicator tube momentarily, then becomes standby states.
PAGE 19
CX-JT8 [AGING MODE] • This mode can be used for operation check of CD section and tape deck section. CD section and tape deck section work in parallel. If an error occurred: The aging operation stops only an error occurred sections and display then status. If no error occurs: The aging operation continues repeatedly. Procedure: 1. Press the [POWER] key to turn the power ON. 2. Press the [CD] key to select “CD”. 3. Set disc on the tray and set tape into the deck. 4.
PAGE 20
CX-JT8 [GC TEST MODE] [MODEL, DESTINATION AND VERSION DISPLAY] • This mode is used to check the fluorescent indicator tube, LED and key. Procedure: 1. Press the [POWER] key to turn the power ON. 2. Press three keys of x , [HEAVY] and [DISC DIRECT PLAY 2] simultaneously. 3. Fluorescent indicator tube and LEDs are all turned ON. 4. Press two keys of [HEAVY] and [DISC DIRECT PLAY 2] simultaneously, mode is changed over. 5.
PAGE 21
CX-JT8 SECTION 5 ELECTRICAL ADJUSTMENTS Note: Clear RF signal waveform means that the shape “ ◊ ” can be clearly distinguished at the center of the waveform. CD SECTION Note: 1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given. 2. Use YEDS-18 (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10MΩ impedance. 4.
PAGE 22
CX-JT8 SECTION 6 DIAGRAMS BLOCK DIAGRAM – CD Section – RF AMP, FOCUS/TRACKING ERROR AMP, DIGITAL SIGNAL PROCESSOR, DIGIRAL SERVO PROCESSOR, DIGITAL FILTER, D/A CONVERTER IC721 EFMIN ERROR CORRECT D/A CONVERTER MP3 DECODER IC801 ASDFIN 57 ASDACK 56 ASLRCK 55 2 ADDATA 3 ADBCK 4 ADLRCK SERIAL OUT DATA 60 DATACK 59 LRSY 58 79 DATAIN 80 DATACK 1 LRSY TIN1 F 10 EFLG 53 C2F 52 FSX/16MIN 50 A/D CONVERTER TBAL TIN2 5 C2FIN 9 CKOUT MP3RES 26 LASER DIODE SERVO PROCESSOR AUTOMATIC POWER CONTROL Q701 L
PAGE 23
CX-JT8 6-2.
PAGE 24
CX-JT8 BLOCK DIAGRAM – AMP/POWER SUPPLY Section – J401 MIC MIC LEVEL AGC Q401 MIC, SA VR401 MIC MIXING MIC AMP IC401 (1/2) SA (Except AEP, UK, CIS) MIC 6-3.
PAGE 25
CX-JT8 6-4. • Circuit Boards Location NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Printed Wiring Board: • X : parts extracted from the component side. • Y : parts extracted from the conductor side. • : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.) Caution: Pattern face side: (Conductor Side) Parts face side: (Component Side) Parts on the pattern face side seen from the pattern face are indicated.
PAGE 26
CX-JT8 6-5. PRINTED WIRING BOARD – BD Board – 1 • See page 25 for Circuit Boards Location. 2 3 4 :Uses unleaded solder.
PAGE 27
CX-JT8 FSYNC MP3_CE CL R721 100 CD_CE R731 2.2k DI CD_RES DRF R732 0 DO • See page 52 for IC Block Diagrams. • See page 52 for Waveforms. CD_WRQ VIN R726 680 R725 680 C754 47p R720 100 C744 1 R718 100 R729 12k R719 100 C708 0.1 C742 0.1 R716 100 C746 0.1 R717 100 C709 100 6.3V C743 0.047 GND Q701 UP0411600SO C807 100 6.3V C844 0.1 C704 47 6.3V CONTROL C703 0.1 R730 1.
PAGE 28
CX-JT8 PRINTED WIRING BOARDS – CHANGER Section – • See page 25 for Circuit Boards Location. SENSOR BOARD A :Uses unleaded solder.
PAGE 29
CX-JT8 VCC FIN GND RIN FIN GND RIN VM VM VCC OUT1 OUT1 DRIVE OUT2 VREF LOADING MOTOR RNF • See page 52 for IC Block Diagrams. RNF SCHEMATIC DIAGRAM – CHANGER Section – IC701 BA6956AN CN721 2P M751 R702 100 CN704 2P LM-2 LM-2 LM-1 LM-1 C751 0.01 (LOADING) R701 470 D701 MTZJ-T-77 5.1A S711 TABLE MOTOR CN703 4P E3 E-3 E2 E-2 E1 E-1 VREF ADDRESS DETECT DRIVE OUT2 DISC TRAY IC712 BA6956AN R721 4.7k R723 4.7k R722 4.7k C737 0.1 C735 0.1 GND C736 0.1 6-8.
PAGE 30
CX-JT8 SCHEMATIC DIAGRAM – MAIN Board (1/4) (Suffix-11) – • See page 52 for IC Block Diagram. (1/4) CN101 11P CLK CLK DO DO DI DI A1 A2 CE CE TUNER UNIT SUPPLIED WITH TUNED THE ASSEMBLED TUNED C103 100 16V ST ST BLOCK TUNER-L LOOP C101 4.7 50V C310 10 50V R101 10k GND TUNER-R R102 10k TU-MUTE TUMUTE A4 A5 C309 10 50V -VFL C102 4.7 50V C365 220p Q312 2SA1235F R380 470k C301 10 50V R395 2.2k R301 4.7k MUTING L CONTROL MD(VIDEO) R397 1k IN SWITCH CD-MUTE R396 2.
PAGE 31
CX-JT8 6-10. SCHEMATIC DIAGRAM – MAIN Board (2/4) (Suffix-11) – • See page 52 for IC Block Diagram. • See page 52 for Waveforms. C268 1 50V (2/4) R216 4.7k R286 10k A1 R272 10k C272 1 50V C260 0.47 50V R266 4.7k C248 2.2 50V (DECK-A) C266 0.01 C286 2200p C258 4.
PAGE 32
CX-JT8 6-11. SCHEMATIC DIAGRAM – MAIN Board (3/4) (Suffix-11) – • See page 52 for IC Block Diagram. B10 B8 B9 B7 B6 B5 B4 B3 B1 B2 (Page 30) (3/4) F1 F2 F3 R339 1k R375 4.7k R340 5.6k C316 4.7 50V R347 4.7k CN306 13P C330 4.7 50V C340 47 16V R338 4.7k R331 3.3k R478 2.2k R403 820 Q315 2SK2158 Q314 2SK2158 Q316 2SK2158 Q314-316 JR337 0 FERQUENCY L-OUT CONTROL 18 SP-GND 19 20 R-OUT LINK R336 27k R495 22k UNREG VM R468 82k C329 4.7 50V C382 3300p IN-L R337 1.5k R467 1.
PAGE 33
CX-JT8 6-12.
PAGE 34
CX-JT8 6-13. PRINTED WIRING BOARD – MAIN Board (Suffix-11) – • See page 25 for Circuit Boards Location.
PAGE 35
CX-JT8 6-14. PRINTED WIRING BOARD – MAIN Board (Suffix-13) – 1 2 3 4 5 • See page 25 for Circuit Boards Location. 6 7 8 9 10 :Uses unleaded solder.
PAGE 36
CX-JT8 6-15. SCHEMATIC DIAGRAM – MAIN Board (1/4) (Suffix-13) – • See page 52 for IC Block Diagram. (1/4) ∗ CN101 CN101 ∗ CLK 15P (AEP,UK) 11P (EXCEPT AEP,UK) CLK A1 DO DO DI DI A2 CE CE VM+9V D102 10EDB40-TB3 TUNED TUNED THE ASSEMBLED C101 4.7 50V C310 10 50V GND BLOCK TUNER-R LOOP R102 10k TU-MUTE TUMUTE +3.3V A3 FM SIGNAL OUT A4 RDS INT RCLK A5 RDS DATA C309 10 50V RDATA -VFL (AEP,UK) (AEP,UK,CIS) C365 220p Q312 2SA1235F R380 470k C301 10 50V R395 2.2k C108 0.
PAGE 37
CX-JT8 6-16. SCHEMATIC DIAGRAM – MAIN Board (2/4) (Suffix-13) – • See page 52 for IC Block Diagram. • See page 52 for Waveforms. C268 1 50V (2/4) R286 10k A1 R216 4.7k C260 0.47 50V R272 10k R266 4.7k C248 2.2 50V C272 1 50V C286 2200p C250 2.2 50V C258 4.
PAGE 38
CX-JT8 6-17. SCHEMATIC DIAGRAM – MAIN Board (3/4) (Suffix-13) – • See page 52 for IC Block Diagram. B9 B10 B7 B8 B6 B5 B4 B3 B1 B2 (Page 36) (3/4) F1 F2 F3 R375 ∗ C316 4.7 50V R347 4.7k CN306 13P 4.7k (E,E51,SP,AUS) 10k (AEP,UK,CIS) 10k (AEP,UK,CIS) C330 4.7 50V C340 47 16V R338 4.7k ∗ R331 R403 ∗ R375 5.6k (E,E51,SP,AUS) R331 ∗ R339 1k R340 ∗ ∗ R340 1.5k (AEP,UK,CIS) 3.
PAGE 39
CX-JT8 6-18.
PAGE 40
CX-JT8 6-19. PRINTED WIRING BOARD – POWER Board – (AEP, UK, CIS, E51 models) • See page 25 for Circuit Boards Location.
PAGE 41
CX-JT8 6-20. PRINTED WIRING BOARD – POWER Board – (E, SP, AUS models) 2 3 4 5 :Uses unleaded solder. 6 7 8 (Page 35) 9 BOARD G3 MAINCN307 MAIN BOARD CN306 C3 (CHASSIS) POWER BOARD 13 1 JW29 C14 JW38 R103 R104 1 R36 A K D13 K K E R23 R13 R22 D11 R19 R40 R38 R17 R16 E D514 Q6 Q5 E E Q8 R20 C23 JW15 D511 JW541 C541 D24 S D G D39 R39 S D Ref. No.
PAGE 42
CX-JT8 6-21. SCHEMATIC DIAGRAM – POWER Board (1/2) – (1/2) (SUFFIX-11) CN501 13P C1 A1 L-OUT SP-GND A2 R-OUT SURR LINK/MATRIX UNREG VM (Page 32) RYB+ RELAY B+ IN-L C2 A3 A-GND IN-R A4 VCC VCC PW-GND A5 VM(AC) (Page 38) VM(AC) O-POWER HOLD (SUFFIX-13) R18 100 R19 15k C23 0.22 50V R20 10k R28 1k -VL R4 4.7k R6 56k R7 56k R8 56k R9 56k R10 1k R11 1k R12 10k R14 6.8k D11 1SS355TE-17 R13 2.2k CN502 13P (SUFFIX-11) MUTE G1 D40 1SS355TE -17 2.
PAGE 43
CX-JT8 6-22. SCHEMATIC DIAGRAM – POWER Board (2/2) – (2/2) A1 A2 D503 MC2838 R539 10k R529 4.7k R541 2.2k R537 1k A3 ∗ C517,518 0.22 50V (AEP,UK,CIS) A4 D501 MC2836 R543 2.2k D510 MC2836 R559 3.9k R521 1.8k 0.47 50V (E,E51,SP,AUS) C511 33 35V C521 ∗ C521,522 ∗ 0.47 50V (AEP,UK,CIS) C517 ∗ Q519 2SB792A(RS) 4.7 50V (E,E51,SP,AUS) C507 100p 100V R545 100 ∗ R555,556 Q501 2SD2562 Q507 2SC3052F Q509 2SC3052F Q507,509 C505 100p 100V R505 100 Q501,503 BIAS FINAL R507 1.
PAGE 44
CX-JT8 6-23. PRINTED WIRING BOARDS – CD BUTTON/HEADPHONE/MICROPHONE Boards – • See page 25 for Circuit Boards Location. :Uses unleaded solder.
PAGE 45
CX-JT8 6-24. SCHEMATIC DIAGRAM – CD BUTTON/HEADPHONE/MICROPHONE Boards – (E,E51,SP,AUS) (SUFFIX-11) D1 CN402 3P CN105 5P J401 MIC MIC IN L-OUT GND HP-GND C301 1000p J221 PHONES (Page 32) MIC OUT (Page 47) R-OUT HP CTL D2 HP CTL (Page 38) (SUFFIX-13) DISC DIRECT PLAY R331 10k S331 C302 1000p S330 R330 10k S329 R329 6.8k R328 4.7k S328 S327 LED301,S328 LED302,S329 LED303,S330 1 2 3 R327 3.
PAGE 46
CX-JT8 6-25. PRINTED WIRING BOARD – PANEL Board – 1 2 3 4 • See page 25 for Circuit Boards Location. 5 6 7 8 :Uses unleaded solder.
PAGE 47
CX-JT8 6-20. SCHEMATIC DIAGRAM – PANEL Board – • See page 52 for IC Block Diagram. • See page 52 for Waveforms. FL901 VF2 B2 C215 22p C216 22p D-GND VM R119 0 R501 470 R416 270k CD3 CD3 CD2 CD2 CD1 R414 10 C412 1 50V CD1 C411 560p C404 2.2 50V 5 8 C408 0.1 50V R405 2.2k R404 100 MIC OUT CN401 3P 6 S JW404 (Page 45) C407 82p R401 100k C402 0.1 FB401 0.45UH C401 0.1 C403 4700p C406 220 10V Q401 2SK2158 MIC LEVEL JW408 C441 0.
PAGE 48
CX-JT8 6-27. PRINTED WIRING BOARD – TRANSFORMER Board – (AEP, UK, CIS, E51 models) • See page 25 for Circuit Boards Location. :Uses unleaded solder.
PAGE 49
CX-JT8 6-28. PRINTED WIRING BOARD – TRANSFORMER Board – (E, SP, AUS models) • See page 25 for Circuit Boards Location. :Uses unleaded solder.
PAGE 50
CX-JT8 6-29. SCHEMATIC DIAGRAM – TRANSFORMER BOARD – (AEP, UK, CIS, E51 models) (EXCEPT E51) PT901 ∗ NOT REPLACEABLE: MAIN POWER TRANSFORMER BUILT IN TRANSFORMER (E51) F902 T2.5AL 250V PT901 MAIN POWER TRANSFORMER (E51) CN902 11P VH(AC) S901 F905 T8AL 250V -1 (EXCEPT E51) AC VOLTAGE JW902 VL(AC) 230-240V GND VL(AC) 220V JW905 VH(AC) -2 VM(AC) 120V VM(AC) JW906 FIL-1 (EXCEPT E51) FIL-2 (Page 42) (E51) P-ON F906 T8AL 250V EVER+10V D906 1SS355 JW903 RY902 (E51) C901 0.
PAGE 51
CX-JT8 6-30. SCHEMATIC DIAGRAM – TRANSFORMER BOARD – (E, SP, AUS models) ∗ NOT REPLACEABLE: BUILT IN TRANSFORMER PT901 F902 T2.5AL 250V MAIN POWER TRANSFORMER F905 T8AL 250V (E,SP) JW918 (AUS) JW905 -1 JW913 CN902 11P S901 AC VH(AC) VOLTAGE VL(AC) 220-240V GND JW906 -2 VL(AC) 100-120V VH(AC) VM(AC) F906 T8AL 250V VM(AC) (AUS) FIL-1 (Page 42) JW911 FIL-2 P-ON C901 0.
PAGE 52
CX-JT8 ws IC901 qg (CF1) TIN2 15.8 Vp-p RF TEC PH AGC EQ BH LPF + – TBAL + – TBAL LPF SW + – LPF + – + – RFMON MONI CONT – + VREF RAM DEFECT 2.6 Vp-p WRQ DO DI CL CE WRQ DO DI CL CE MIX LEVEL SET REFI Approx. 180 mVp-p 65 64 63 62 61 + – TIN1 30.5 µs qs Q223 (Collector) (REC Mode) 78 77 76 75 74 73 72 71 70 69 68 67 66 + – FIN2 2 IC721 qd (TE) (CD Play Mode) 80 79 FE FIN1 11.3 µs VSS VDD5 DRF RES LC78646E-E 2.4 Vp-p 1.7 Vp-p 1.
PAGE 53
CX-JT8 – DRIVER Board – IC701, 712 BA6956AN TSD 7 8 GND 9 RIN 6 FIN 5 VCC 4 VM 3 OUT1 2 RNF VREF 1 OUT2 CONTROL LOGIC – MAIN Board – PB-EQ (L) EQOUT (L) TAI (L) PBOUT (L) NC RECIN (L) ALC (L) NC RECOUT (L) HA12237F PB-NF2 (L) IC201 30 29 28 27 26 25 24 23 22 21 EQ 93/120 (HIGH/NORM) PB-NF1 (L) 31 MUTE 20 TEST MODE 19 IREF AIN (L) 32 A B 18 GND RIP 33 BIN (L) 34 17 ALC DET ALC RETURN SW 16 VCC REC-RETURN 35 15 REC MUTE OFF/ON GND 36 RETURN SW 14 MUTE ON/
PAGE 54
CX-JT8 SUR2/DPL2 INA2 INB2 INC2 IND2 RECA1/INEX2 RECB2 TMI2 TMO2 TCA2 TCB2 TCC2 TOUT2 VOLIN2 BB A2 BB B2 OUT2 SWOUT GND CLOCK M61529FP-D60G 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 SUR1/DPL1 IC301 TONE CONTROL (BASS/MID/TREBLE) ELECTRICAL VOLUME INPUT ATT BASS BOOST TONE ATT + + SURROUND OR DPL BUFFER VOCAL CUT MCU INTERFACE + + TONE ATT BASS BOOST EXTERNAL INPUT ATT INPUT ATT ELECTRICAL VOLUME TONE CONTROL (BASS/MID/TREBLE) INA1 INB1 INC1
PAGE 55
CX-JT8 6-31. IC PIN FUNCTION DESCRIPTION • MAIN BOARD IC309 BU2099FV (MULTI CONTROLLER) Pin No.
PAGE 56
CX-JT8 • MAIN BOARD IC310 BU2099FV ( BASS BOOST CONTROLLER) Pin No.
PAGE 57
CX-JT8 • PANEL BOARD IC201 BU2099FV (LED DRIVER) Pin No.
PAGE 58
CX-JT8 • PANEL BOARD IC202 BU2099FV (LED DRIVER, TAPE MECHANISM CONTROLLER) Pin No.
PAGE 59
CX-JT8 • PANEL BOARD IC901 LC8767962B-51F6 (SYSTEM CONTROLLER) Pin No.
PAGE 60
CX-JT8 Pin No.
PAGE 61
CX-JT8 SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they may have some difference from the original one. • Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE) . . . (RED) ↑ ↑ Parts Color Cabinet's Color • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. • The mechanical parts with no reference number in the exploded views are not supplied.
PAGE 62
CX-JT8 7-2. FRONT PANEL SECTION-1 #1 58 62 #1 60 57 68 59 61 67 56 63 64 65 66 53 54 55 front panel section-2 52 51 Ref. No. Part No.
PAGE 63
CX-JT8 7-3. FRONT PANEL SECTION-2 105 102 104 103 #1 101 E, E51, SP, AUS 102 107 #1 not supplied front panel section-3 Ref. No. 101 102 103 104 Part No. Description 1-688-545-11 3-229-336-01 4-245-142-01 X-4955-415-1 HEADPHONE BOARD SCREW, +BVWH TAPPING SHEET, FL F4 KEY (CD) ASSY (DISC CHANGE. 1. 2. 3. Z) Remark Ref. No. 105 106 107 #1 106 Part No.
PAGE 64
CX-JT8 7-4. FRONT PANEL SECTION-3 153 154 152 155 156 157 151 front panel section-4 Ref. No. 151 152 153 154 155 64 Part No. Description Remark 4-245-124-01 4-245-122-01 X-4955-411-1 X-4955-412-1 4-245-121-01 KEY, RDS KEY, REC KEY (POWER) ASSY KEY (GEQ L) ASSY (HEAVY. VOCAL. SALSA) KEY, ENTER Ref. No. 156 157 Part No. Description Remark X-4955-414-1 KEY (OPE) ASSY (SURROUND. i-BASS. m. X.bB. x. M) X-4955-413-1 KEY (GEQ R) ASSY (TECHNO. HIP HOP.
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CX-JT8 7-5. FRONT PANEL SECTION-4 208 209 207 210 212 #1 211 213 207 215 206 214 214 204 213 #1 205 216 215 203 201 217 202 Ref. No. Part No. Description 201 202 203 204 205 4-245-115-01 4-245-111-01 4-245-110-01 4-242-161-01 4-242-163-01 WINDOW, CASSETTE PANEL, DOOR BOX, DOOR MAGNET, BOX COVER, MAGNET 206 207 208 209 210 4-242-164-01 4-242-162-01 4-245-112-01 4-245-009-01 4-245-138-01 SH, W/ADH PLATE, BOX BOX, CASSETTE (1) SPR-T, BOX CASS L BOX, CASSETTE (2) Remark Ref. No.
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CX-JT8 7-6. CHASSIS SECTION-1 M731 252 #1 not supplied #1 #1 #1 #1 not supplied 253 chassis section-2 Ref. No. 252 253 253 66 Part No. Description 4-951-620-41 SCREW (2.6), +BVTP 1-693-626-11 TUNER (FM/AM) (AEP, UK) 1-693-627-11 TUNER (FM/AM) (CIS) Remark Ref. No. 253 #1 M731 Part No.
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CX-JT8 7-7. CHASSIS SECTION-2 not supplied 306 not supplied 302 303 301 #2 #1 307 306 311 not supplied 308 304 PT901 F902 F905 305 F906 310 309 not supplied #1 #1 The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No.
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CX-JT8 7-8. CD MECHANISM DECK SECTION-1 (CDM74F-K6BD71A) 502 502 505 503 504 502 507 506 501 515 508 514 516 513 M741 515 509 516 514 513 510 512 511 503 CD mechanism deck section -2 Ref. No. Part No. Description 501 502 503 504 505 -243-815-01 4-218-252-61 4-218-253-21 1-687-132-11 4-243-819-01 TABLE (LOADING) SCREW (+PTPWH M2.6), FLOATING SCREW (M2.
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CX-JT8 7-9. CD MECHANISM DECK SECTION-2 (CDM74F-K6BD71A) 559 562 551 560 551 558 564 554 561 565 S711 563 M751 CD mechanism deck section -3 556 557 553 555 552 554 551 554 Part No. Description Part No. Description 551 552 553 554 555 4-218-252-61 4-244-034-01 4-224-613-01 4-218-253-31 1-687-669-11 SCREW (+PTPWH M2.6), FLOATING BELT (LOADING) GEAR (SHAFT) SCREW (M2.
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CX-JT8 7-10. CD MECHANISM DECK SECTION-3 (CDM74F-K6BD71A) 603 604 605 602 601 612 606 604 BU-K6BD71A 607 608 609 610 Ref. No. Part No. Description 601 602 603 604 605 X-4955-707-1 1-471-035-11 4-231-189-01 4-218-252-61 4-243-822-01 PULLEY (A5) ASSY, CHUCKING MAGNET ASSY PULLEY (B), CHUCKING SCREW (+PTPWH M2.6), FLOATING LEVER (LIFTER) 606 X-4955-536-1 HOLDER (213) ASSY 70 Remark Ref. No. 607 608 609 610 612 Part No.
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CX-JT8 7-11. BASE UNIT SECTION (BU-K6BD71A) 656 655 654 653 657 652 658 659 M702 M701 651 #3 The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No. Description 651 652 653 654 655 A-4732-699-A 3-713-786-51 2-627-003-01 2-626-908-51 2-646-702-01 BD BOARD, COMPLETE SCREW (M2X3) GEAR (B) (RP) SHAFT, SLED SPRING, EXTENSION 656 2-646-697-02 SHUTTER (F), LENS Remark Ref. No. Part No.
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CX-JT8 SECTION 8 ELECTRICAL PARTS LIST BD NOTE: • Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. • -XX and -X mean standardized parts, so they may have some difference from the original one. • RESISTORS All resistors are in ohms. METAL: Metal-film resistor. METAL OXIDE: Metal oxide-film resistor.
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CX-JT8 BD Ref. No. Part No. Description Remark FB806 FB807 1-550-907-21 FERRITE 1-550-907-21 FERRITE 0uH 0uH FB808 1-550-907-21 FERRITE 0uH < IC > IC721 IC722 IC801 IC802 IC803 6-701-796-01 6-704-220-01 6-704-008-01 6-704-009-01 6-704-007-01 IC IC IC IC IC LC78646E-E BA5836FP LC78684E-E LC32V4265CT-25-MPB-E MM1571J < TRANSISTOR > Q701 8-729-054-51 TRANSISTOR Ref. No. Part No.
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CX-JT8 DRIVER Ref. No. HEADPHONE Part No. MAIN Description Remark Ref. No. 1-687-135-11 DRIVER BOARD ************* < CAPACITOR > C715 C731 C735 C736 C737 1-126-933-11 1-126-964-11 1-164-159-21 1-164-159-21 1-164-159-21 ELECT ELECT CERAMIC CERAMIC CERAMIC 100uF 10uF 0.1uF 0.1uF 0.1uF 20% 20% C741 C751 C752 1-162-306-11 CERAMIC 1-162-306-11 CERAMIC 1-164-159-21 CERAMIC 0.01uF 0.01uF 0.
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CX-JT8 MAIN Ref. No. Part No. Description Remark C314 1-107-714-11 ELECT 10uF 20% 16V C315 C316 C317 C318 C319 1-126-963-11 1-126-963-11 1-126-964-11 1-126-964-11 1-165-176-11 ELECT ELECT ELECT ELECT CERAMIC CHIP 4.7uF 4.7uF 10uF 10uF 0.047uF 20% 20% 20% 20% 10% 50V 50V 50V 50V 16V C320 C321 C323 C324 C325 1-130-487-00 1-130-487-00 1-130-487-00 1-130-487-00 1-130-491-00 MYLAR MYLAR MYLAR MYLAR MYLAR 0.022uF 0.022uF 0.022uF 0.022uF 0.
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CX-JT8 MAIN Ref. No. Part No.
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CX-JT8 MAIN Ref. No. Part No. Description Q330 Q331 Q372 Q373 Q491 8-729-120-28 6-550-289-01 8-729-120-28 8-729-142-46 8-729-120-28 TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR Q492 8-729-045-62 FET Remark 2SC1623-L5L6 2SA1235F 2SC1623-L5L6 2SC2001-LK 2SC1623-L5L6 2SK2158-T2B < RESISTOR > Ref. No. Part No.
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CX-JT8 MAIN Ref. No. MICROPHONE Part No. MOTOR (LD) Description Remark R375 1-216-829-11 METAL CHIP 4.7K 5% 1/10W (E, E51, SP, AUS) R375 1-216-833-11 METAL CHIP 10K R378 R379 R380 R384 1-216-833-11 1-216-825-11 1-216-853-11 1-216-821-11 METAL CHIP METAL CHIP METAL CHIP METAL CHIP 10K 2.
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CX-JT8 PANEL Ref. No. Part No. Description A-4734-174-A A-4734-290-A A-4734-798-A A-4734-949-A PANEL BOARD, COMPLETE (AEP, UK) PANEL BOARD, COMPLETE (E51) PANEL BOARD, COMPLETE (CIS) PANEL BOARD, COMPLETE (E, SP, AUS) ********************** Remark 4-245-133-01 GUIDE, FL < CAPACITOR > C201 C202 C203 C204 C205 1-126-960-11 1-162-966-11 1-126-965-11 1-164-345-11 1-164-004-11 ELECT CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP 1uF 0.0022uF 22uF 0.082uF 0.
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CX-JT8 PANEL Ref. No. Part No.
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CX-JT8 PANEL Ref. No. Part No.
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CX-JT8 PANEL Ref. No. Part No. Description Remark R414 1-216-797-11 METAL CHIP 10 R415 1-247-807-31 CARBON 100 R416 1-247-889-00 CARBON 270K R417 1-249-431-11 CARBON 15K R418 1-216-853-11 METAL CHIP 470K R419 1-216-821-11 METAL CHIP 1K R432 1-216-841-11 METAL CHIP 47K R501 R502 R503 R504 R505 1-216-190-00 1-216-841-11 1-216-841-11 1-216-833-11 1-249-425-11 RES-CHIP METAL CHIP METAL CHIP METAL CHIP CARBON 470 47K 47K 10K 4.
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CX-JT8 PANEL Ref. No. Part No. Description Remark R949 R950 R951 1-216-845-11 METAL CHIP 1-249-441-11 CARBON 1-249-441-11 CARBON 100K 100K 100K 5% 5% 5% 1/10W 1/4W 1/4W R952 R953 R954 R955 R957 1-216-845-11 1-216-845-11 1-249-419-11 1-249-441-11 1-249-441-11 METAL CHIP METAL CHIP CARBON CARBON CARBON 100K 100K 1.
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CX-JT8 POWER Ref. No. Part No.
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CX-JT8 POWER Ref. No. Part No.
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CX-JT8 POWER Ref. No. Part No. Description R70 R71 R72 R73 R74 1-216-835-11 1-216-833-11 1-216-829-11 1-216-244-00 1-216-238-11 METAL CHIP METAL CHIP METAL CHIP RES-CHIP RES-CHIP 15K 10K 4.7K 82K 47K 5% 5% 5% 5% 5% 1/10W 1/10W 1/10W 1/8W 1/8W Remark R75 R76 R77 R78 R79 1-216-825-11 1-216-827-11 1-216-827-11 1-216-234-00 1-216-830-11 METAL CHIP METAL CHIP METAL CHIP RES-CHIP METAL CHIP 2.2K 3.3K 3.3K 33K 5.
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CX-JT8 POWER Ref. No. Part No. Description Remark R561 R562 R563 1-216-843-11 METAL CHIP 1-216-857-11 METAL CHIP 1-216-214-00 RES-CHIP 68K 1M 4.7K 5% 5% 5% 1/10W 1/10W 1/8W R564 R567 R568 R569 R570 1-216-214-00 1-216-214-00 1-216-214-00 1-216-853-11 1-260-076-21 RES-CHIP RES-CHIP RES-CHIP METAL CHIP CARBON 4.7K 4.7K 4.
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CX-JT8 Ref. No. Part No.
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CX-JT8 MEMO 89
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CX-JT8 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. 1.0 Date 2003.