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SERVICE MANUAL

COMPACT DISC DECK RECEIVER

AEP Model

UK Model

CX-JN55

Ver 1.1  2004.08

SPECIFICATIONS

CX-JN55 is the amplifier, CD player, tape deck
and tuner section in JAX-N55.

– Continued on next page –

9-877-791-02

2004H05-1
© 2004.08

Sony Corporation

Personal Audio Company
Published by Sony Engineering Corporation

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

Tu ner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range
Russian models

65.0 

 74.0 MHz

(There is no stereo effect. 
10-kHz step)
87.5 

 108.0 MHz

(50-kHz step)

Other models

87.5 

 108.0 MHz

(50-kHz step)

Antenna

FM lead antenna

Antenna terminals

75 ohms unbalanced

Intermediate frequency

10.7 MHz

531 

 1,602 kHz (with the 

tuning interval set at 
9 kHz)

AM tuner section

Tuning range

Antenna

AM loop antenna

Antenna terminals

External antenna terminal

Intermediate frequency

450 kHz 

CD player section

System

Compact disc and digital 
audio system

Laser

Semiconductor laser 
(

λ

=780 nm)

Emission duration: 
continuous

Frequency response

2 Hz 

 20 kHz (

±

0.5 dB)

Signal-to-noise ratio

More than 90 dB

Dynamic range

More than 90 dB

Tap e deck section

Recording system

4-track 2-channel, stereo

Frequency response

50 

 13,000 Hz (

±

3 dB), 

using Sony TYPE I 
cassettes

Model Name Using Similar Mechanism

CX-JN77

CD

CD Mechanism Type

CDM74-F1BD81

Section

Base Unit Name

BU-F1BD81A

Optical Pick-up Name

KSM-215DCP

Tape deck

Model Name Using Similar Mechanism

CX-JN30

Section

Tape Transport Mechanism Type

CWM43FF13

Summary of Contents for CX-JN55

Page 1: ...els 65 0 74 0 MHz There is no stereo effect 10 kHz step 87 5 108 0 MHz 50 kHz step Other models 87 5 108 0 MHz 50 kHz step Antenna FM lead antenna Antenna terminals 75 ohms unbalanced Intermediate fre...

Page 2: ...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 s...

Page 3: ...Printed Wiring Boards CDMP3 CONNECT TRANSLATION Boards 30 6 10 Schematic Diagram CDMP3 CONNECT TRANSLATION Boards 31 6 11 Schematic Diagram MAIN Section 1 4 32 6 12 Schematic Diagram MAIN Section 2 4...

Page 4: ...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 surfac...

Page 5: ...ION CD MECHANISM DECK 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 CD mechanism deck st...

Page 6: ...6 CX JN55 AMP BOARD FRONT PANEL SECTION MAIN board PANEL board front panel section tape mechanism deck SUB TRANS board TRANS board POWER board MAIN board front panel section...

Page 7: ...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 VOLUM...

Page 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 Setting the clock Remote control ALBUM qa ALBUM qd CD qk...

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