Sony CX-JN88 / JAX-N88 / JAX-PK88 Service Manual ▷ View online
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
AEP Model
E Model
Australian Model
CX-JN88
Ver. 1.2 2005.05
SPECIFICATIONS
•
CX-JN88 is the amplifier, CD player, tape deck
and tuner section in JAX-N88/PK88.
and tuner section in JAX-N88/PK88.
– Continued on next page –
Model Name Using Similar Mechanism
CX-JN77
CD
CD Mechanism Type
CDM74-F1BD81
Section
Base Unit Name
BU-F1BD81A
Optical Pick-up Block Name
KSM-215DCP
Tape deck
Model Name Using Similar Mechanism
CX-JN77
Section
Tape Transport Mechanism Type
CWM43FR34
9-877-788-03
2005E05-1
© 2005.05
© 2005.05
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
Published by Sony Engineering Corporation
Australian model:
Other models:
The following measured at AC 120, 220, 240 V
50/60 Hz
DIN power output (rated): 144 + 144 watts (6 ohms at
50/60 Hz
DIN power output (rated): 144 + 144 watts (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
180 + 180 watts (6 ohms at
1 kHz, 10% THD)
1 kHz, 10% THD)
The following measured at AC 120, 220, 240 V
50/60 Hz
DIN power output (rated): 144 + 144 watts (6 ohms at
50/60 Hz
DIN power output (rated): 144 + 144 watts (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
180 + 180 watts (6 ohms at
1 kHz, 10% THD)
1 kHz, 10% THD)
Inputs
VIDEO/MD IN (phono jacks):
VIDEO/MD IN (phono jacks):
voltage 450/250 mV,
impedance 47 kilohms
impedance 47 kilohms
Amplifier section
European and Russian models:
DIN power output (rated): 100 + 100 watts (6 ohms at
DIN power output (rated): 100 + 100 watts (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
125 + 125 watts (6 ohms at
1 kHz, 10% THD)
1 kHz, 10% THD)
Music power output (reference):
250 + 250 watts (6 ohms at
1 kHz, 10% THD)
1 kHz, 10% THD)
Outputs
PHONES (stereo mini jack):
PHONES (stereo mini jack):
accepts headphones of
8 ohms or more
8 ohms or more
SPEAKER:
accepts impedance of 6 to
16 ohms
16 ohms
SURROUND SPEAKER: accepts impedance of 6 to
16 ohms
CD player section
System
Compact disc and digital
audio system
audio system
Laser
Semiconductor laser
(
(
λ
=780 nm)
Emission duration:
continuous
continuous
Frequency response
2 Hz – 20 kHz (
±
0.5 dB)
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 90 dB
Tape deck section
Recording system
4-track 2-channel, stereo
Frequency response
50 – 13,000 Hz (
±
3 dB),
using Sony TYPE I
cassettes
cassettes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
Russian models
Russian models
65.0 – 74.0 MHz
(There is no stereo effect.
10-kHz step)
87.5 – 108.0 MHz
(50-kHz step)
(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)
(50-kHz step)
Antenna
FM lead antenna
Antenna terminals
75 ohms unbalanced
Intermediate frequency
10.7 MHz
CX-JN88
2
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
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.
other than those specified herein may result in hazardous radiation
exposure.
UNLEADED SOLDER
Boards requiring use of 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
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 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)
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.
occur such as on IC pins, etc.
•
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
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.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
AM tuner section
Tuning range
Pan-American models:
Pan-American models:
530 – 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 – 1,710 kHz
(with the tuning interval
set at 9 kHz)
(with the tuning interval
set at 10 kHz)
531 – 1,710 kHz
(with the tuning interval
set at 9 kHz)
European and Russian models:
531 – 1,602 kHz (with the
tuning interval set at
9 kHz)
tuning interval set at
9 kHz)
Other models:
530 – 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
(with the tuning interval
set at 10 kHz)
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna
AM loop antenna
Antenna terminals
External antenna terminal
Intermediate frequency
450 kHz
General
Power requirements
European and Russian models:
European and Russian models:
230 V AC, 50/60 Hz
Australian models:
230 – 240 V AC, 50/60 Hz
Other models:
120 V, 220 V or
230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector
230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption
European and Russian models:
European and Russian models:
205 watts
0.25 watts (at the Power
Saving Mode)
0.25 watts (at the Power
Saving Mode)
Other models:
180 watts
Dimensions (w/h/d) incl. projecting parts and controls
Amplifier/Tuner/Tape/CD section:
Amplifier/Tuner/Tape/CD section:
Approx. 280
×
325
×
425 mm
Mass Approx.
9.9
kg
Design and specifications are subject to change
without notice.
without notice.
CX-JN88
3
TABLE OF CONTENTS
1.
SERVICING NOTES
................................................
4
2.
GENERAL
Location of Controls ........................................................
7
3.
DISASSEMBLY
3-1.
Disassembly Flow ...........................................................
9
3-2.
Case (Side-L/R) ............................................................... 10
3-3.
Case (Top) ....................................................................... 10
3-4.
Tray Panel ........................................................................ 11
3-5.
CD Mechanism Deck (CDM74-F1BD81) ...................... 11
3-6.
Front Panel Block ............................................................ 12
3-7.
Back Panel Section .......................................................... 12
3-8.
MAIN Board .................................................................... 13
3-9.
Tape Mechanism Deck (CWM43FR34) .......................... 13
3-10. Table Assy ....................................................................... 14
3-11. MOTOR (TB) Board ....................................................... 14
3-12. MOTOR (LD) Board ....................................................... 15
3-13. Base Unit (BU-F1BD81A) .............................................. 15
3-14. CD Board ......................................................................... 16
3-11. MOTOR (TB) Board ....................................................... 14
3-12. MOTOR (LD) Board ....................................................... 15
3-13. Base Unit (BU-F1BD81A) .............................................. 15
3-14. CD Board ......................................................................... 16
4.
TEST MODE
.............................................................. 17
5.
ELECTRICAL ADJUSTMENTS
CD Section ...................................................................... 21
6.
DIAGRAMS
6-1.
Block Diagram – SERVO Section – ............................... 22
6-2.
Block Diagram – MAIN Section – ................................. 23
6-3.
Block Diagram
– PANEL/POWER SUPPLY Section – ........................... 24
– PANEL/POWER SUPPLY Section – ........................... 24
6-4.
Printed Wiring Board – CD Board – .............................. 26
6-5.
Schematic Diagram – CD Board – ................................. 27
6-6.
Printed Wiring Boards – CHANGER Section – ............. 28
6-7.
Schematic Diagram – CHANGER Section – ................. 29
6-8.
Printed Wiring Boards
– CDMP3 CONNECT/TRANSLATION Boards – ......... 30
– CDMP3 CONNECT/TRANSLATION Boards – ......... 30
6-9.
Schematic Diagram
– CDMP3 CONNECT/TRANSLATION Boards – ......... 31
– CDMP3 CONNECT/TRANSLATION Boards – ......... 31
6-10. Schematic Diagram – MAIN Section (1/4) – ................. 32
6-11. Schematic Diagram – MAIN Section (2/4) – ................. 33
6-12. Schematic Diagram – MAIN Section (3/4) – ................. 34
6-13. Schematic Diagram – MAIN Section (4/4) – ................. 35
6-14. Printed Wiring Boards – MAIN Section – ..................... 36
6-15. Printed Wiring Board – PANEL Section – ..................... 37
6-16. Schematic Diagram – PANEL Section (1/2) – ............... 38
6-17. Schematic Diagram – PANEL Section (2/2) – ............... 39
6-18. Printed Wiring Board – POWER AMP Section –
6-11. Schematic Diagram – MAIN Section (2/4) – ................. 33
6-12. Schematic Diagram – MAIN Section (3/4) – ................. 34
6-13. Schematic Diagram – MAIN Section (4/4) – ................. 35
6-14. Printed Wiring Boards – MAIN Section – ..................... 36
6-15. Printed Wiring Board – PANEL Section – ..................... 37
6-16. Schematic Diagram – PANEL Section (1/2) – ............... 38
6-17. Schematic Diagram – PANEL Section (2/2) – ............... 39
6-18. Printed Wiring Board – POWER AMP Section –
(AEP, CIS only) ............................................................... 40
6-19. Schematic Diagram – POWER AMP Section –
(AEP, CIS only) ............................................................... 41
6-20. Printed Wiring Board – POWER AMP Section –
(E51, AUS only) .............................................................. 42
6-21. Schematic Diagram – POWER AMP Section –
(E51, AUS only) .............................................................. 43
6-22. Printed Wiring Boards – TRANS Section –
(AEP, CIS only) ............................................................... 44
6-23. Schematic Diagram – TRANS Section –
(AEP, CIS only) ............................................................... 45
6-24. Printed Wiring Boards – TRANS Section –
(E51, AUS only) .............................................................. 46
6-25. Schematic Diagram – TRANS Section –
(E51, AUS only) .............................................................. 47
7.
EXPLODED VIEWS
7-1.
Case Section .................................................................... 58
7-2.
Tape Mechanism Deck Section (CWM43FR34) ............. 59
7-3.
Cassette Box Section ....................................................... 60
7-4.
Front Panel Section ......................................................... 61
7-5.
Back Panel Section .......................................................... 62
7-6.
Chassis Section ................................................................ 63
7-7.
CD Mechanism Deck Section-1 (CDM74-F1BD81) ...... 64
7-8.
CD Mechanism Deck Section-2 (CDM74-F1BD81) ...... 65
7-9.
CD Mechanism Deck Section-3 (CDM74-F1BD81) ...... 66
7-10. Base Unit Section (BU-F1BD81A) ................................. 67
8.
ELECTRICAL PARTS LIST
................................ 68
•
Abbreviation
AUS : Australian model
E51 : Chilean and Peruvian models
AUS : Australian model
E51 : Chilean and Peruvian models
4
CX-JN88
+
–
+
R
L
R
L
–
– Rear View –
PART No.
SECTION 1
SERVICING NOTES
•
MODEL IDENTIFICATION
MODEL
PART No.
Chilean and Peruvian models
4-253-929-0[]
AEP model
4-253-948-0[]
CIS model
4-253-953-0[]
Australian model
4-255-532-0[]
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.
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 pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
the disc reflective surface by the objective lens in the optical pick-
up 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
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.
that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
