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CX-JN55
SERVICE MANUAL
Ver 1.1 2004.08
AEP Model UK Model
· CX-JN55 is the amplifier, CD player, tape deck and tuner section in JAX-N55.
Model Name Using Similar Mechanism CD Section CD Mechanism Type Base Unit Name Optical Pick-up Name Tape deck Section Model Name Using Similar Mechanism Tape Transport Mechanism Type
CX-JN77 CDM74-F1BD81 BU-F1BD81A KSM-215DCP CX-JN30 CWM43FF13
SPECIFICATIONS
Amplifier section
DIN power output (rated): 52 + 52 watts (6 ohms at 1 kHz, DIN) Continuous RMS power output (reference): 65 + 65 watts (6 ohms at 1 kHz, 10% THD) Music power output (reference): 130 + 130 watts (6 ohms at 1 kHz, 10% THD) Inputs VIDEO/MD IN (phono jacks): voltage 450/250 mV, impedance 47 kilohms Outputs PHONES (stereo mini jack): accepts headphones of 8 ohms or more SPEAKER: accepts impedance of 6 to 16 ohms
CD player section
System Laser Compact disc and digital audio system Semiconductor laser (=780 nm) Emission duration: continuous 2 Hz - 20 kHz (±0.5 dB) More than 90 dB More than 90 dB
Tu ner section
FM stereo, FM/AM superheterodyne tuner FM tuner section Tuning range Russian models
Frequency response Signal-to-noise ratio Dynamic range
Other models Antenna Antenna terminals Intermediate frequency AM tuner section Tuning range
Tap e deck section
Recording system Frequency response 4-track 2-channel, stereo 50 - 13,000 Hz (±3 dB), using Sony TYPE I cassettes
65.0 - 74.0 MHz (There is no stereo effect. 10-kHz step) 87.5 - 108.0 MHz (50-kHz step) 87.5 - 108.0 MHz (50-kHz step) FM lead antenna 75 ohms unbalanced 10.7 MHz 531 - 1,602 kHz (with the tuning interval set at 9 kHz) AM loop antenna External antenna terminal 450 kHz
Antenna Antenna terminals Intermediate frequency
Continued on next page
COMPACT DISC DECK RECEIVER
9-877-791-02
2004H05-1 © 2004.08
Sony Corporation
Personal Audio Company Published by Sony Engineering Corporation
CX-JN55
General
Power requirements Power consumption 230 V AC , 50/60 Hz 110 watts 0.25 watts (at the Power Saving Mode)
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. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
Dimensions (w/h/d) incl. projecting parts and controls Amplifier/Tuner/Tape/CD section: Approx. 280 × 325 × 425 mm Mass Approx. 9.9 kg Design and specifications are subject to change without notice.
This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.
UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the leadfree 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 viscou-s (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.
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH 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 APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
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CX-JN55
TABLE OF CONTENTS 1. 2. 3.
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.
SERVICING NOTES ................................................ 4 GENERAL
Location of Controls ........................................................ 7
7.
7-1. 7-2. 7-3. 7-4. 7-5. 7-6. 7-7. 7-8. 7-9. 7-10.
EXPLODED VIEWS
Case Section .................................................................... Tape Mechanism Deck Section (CWM43FF13) ............. Cassette Box Section ....................................................... Front Panel Section ......................................................... Back Panel Section .......................................................... Chassis Section ................................................................ CD Mechanism Deck Section-1 (CDM74-F1BD81) ...... CD Mechanism Deck Section-2 (CDM74-F1BD81) ...... CD Mechanism Deck Section-3 (CDM74-F1BD81) ...... Base Unit Section (BU-F1BD81A) ................................. 53 54 55 56 57 58 59 60 61 62
DISASSEMBLY
Disassembly Flow ........................................................... Case (Side-L/R) ............................................................... Case (Top) ....................................................................... Tray Panel ........................................................................ CD Mechanism Deck (CDM74-F1BD81) ...................... Front Panel Block ............................................................ Back Panel Section .......................................................... MAIN Board .................................................................... Tape Mechanism Deck (CWM43FF13) .......................... Table Assy ....................................................................... MOTOR (TB) Board ....................................................... MOTOR (LD) Board ....................................................... Base Unit (BU-F1BD81A) .............................................. CD Board ......................................................................... 9 10 10 11 11 12 12 13 13 14 14 15 15 16
8.
ELECTRICAL PARTS LIST ................................ 63
4. 5. 6.
TEST MODE .............................................................. 17 ELECTRICAL ADJUSTMENTS
CD Section ...................................................................... 21
DIAGRAMS
22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
6-1. Block Diagram SERVO Section ............................... 6-2. Block Diagram MAIN Section ................................. 6-3. Block Diagram PANEL/POWER SUPPLY Section ........................... 6-4. Note for Printed Wiring Boards and Schematic Diagrams ........................................................ 6-5. Printed Wiring Board CD Board .............................. 6-6. Schematic Diagram CD Board ................................. 6-7. Printed Wiring Boards CHANGER Section ............. 6-8. Schematic Diagram CHANGER Section ................. 6-9. Printed Wiring Boards CDMP3 CONNECT/TRANSLATION Boards ......... 6-10. Schematic Diagram CDMP3 CONNECT/TRANSLATION Boards ......... 6-11. Schematic Diagram MAIN Section (1/4) ................. 6-12. Schematic Diagram MAIN Section (2/4) ................. 6-13. Schematic Diagram MAIN Section (3/4) ................. 6-14. Schematic Diagram MAIN Section (4/4) ................. 6-15. Printed Wiring Boards MAIN Section ..................... 6-16. Printed Wiring Board PANEL Section ..................... 6-17. Schematic Diagram PANEL Section (1/2) ............... 6-18. Schematic Diagram PANEL Section (2/2) ............... 6-19. Printed Wiring Board POWER AMP Section .......... 6-20. Schematic Diagram POWER AMP Section ............. 6-21. Printed Wiring Boards TRANS Section ................... 6-22. Schematic Diagram TRANS Section .......................
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CX-JN55 SECTION 1 SERVICING NOTES
NOTES ON HANDLING THE 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 pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK Carry out the "S curve check" in "CD section adjustment" and check that the S curve waveforms is output three times.
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CX-JN55
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.
SERVICE POSITION CD MECHANISM DECK
CD mechanism deck
stand
CDMP3 CONNECT board
5
CX-JN55
FRONT PANEL SECTION
MAIN board
PANEL board front panel section
tape mechanism deck
AMP BOARD
front panel section SUB TRANS board POWER board
TRANS board
MAIN board
6
CX-JN55 SECTION 2 GENERAL
· LOCATION OF CONTROLS This section is extracted from instruction manual.
Main unit
ALPHABETICAL ORDER AN OZ BUTTON DESCRIPTIONS
ALBUM + wl ALBUM wl BASS control 5 CD qh CD SYNC qs Deck A 9 Deck B wk DISC 1 3 wd DISC SKIP/EX-CHANGE wf Disc tray ws DISPLAY qg Display window 4 ENTER 2 i-Bass qd MIDDLE control 5
Operation Dial (AMS/TUNING) qf P FILE 6 PHONES jack qa PLAY MODE w; PRESET EQ 3 REC PAUSE/START 8 Remote sensor 7 SURROUND wa TAPE A/B qk TREBLE control 5 TUNER/BAND qj TUNING MODE w; VIDEO/MD ql VOLUME control wh
?/1 (power) 1 Z PUSH (deck A) (eject) 0 Z (eject) wg PUSH Z (deck B) (eject) wj m (rewind) wl x (stop) wl H (play) wl X (pause) wl M (fast forward) wl
1234 5
6 7
q
qh
j qk qlw;waws
qg qf
+ +
Z
Z
qd qs qa 0 9
+
+
+
+
+
+
wd wf wg wh wj wk
+
+
8
wl
7
CX-JN55
Remote control
ALPHABETICAL ORDER AE FZ BUTTON DESCRIPTIONS
Setting the clock
Use buttons on the remote for the operation.
?/1 (power) 1 m/M (rewind/fast forward) 7 N (play) 8 X (pause) 8 x (stop) 8 /+ (tuning) qh ./> (go back/go forward) qh
ALBUM + qa ALBUM qd CD qk CLEAR qg CLOCK/TIMER SELECT 2 CLOCK/TIMER SET 3 DISC SKIP 0 DISPLAY wa ENTER 9 EQ qf
FM MODE 4 FUNCTION 6 PLAY MODE w; REPEAT 4 SLEEP ws TAPE qj TUNER BAND 5 TUNER MEMORY ql TUNING MODE w; VOLUME +/ qs
1 2 3 4 5 6
1 2 3
Press ?/1 to turn on the system. Press CLOCK/TIMER SET. Press . or > repeatedly to set the hour. Press ENTER. Press . or > repeatedly to set the minute. Press ENTER.
The clock starts working.
To adjust the clock
Press CLOCK/TIMER SET. Press . or > repeatedly to select "CLOCK SET", then press ENTER. Do the same procedures as step 3 to 6 above.
Notes
ws wa w; ql qk qj qh
1 2 3 4 5 6 7 8
· The clock settings are canceled when you disconnect the power cord or if a power failure occurs. · You cannot set the clock in Power Saving Mode.
qg qf qd
9 q; qa qs
8