Aiwa CX-JN77 User manual

SERVICE MANUAL
Chilean, Peruvian, Mexican models
DIN power output (rated): 100 + 100 watts (6 ohms at
1kHz, DIN)
Continuous RMS power output (reference):
125 + 125 watts (6 ohms at
1kHz, 10% THD)
Music power output (reference):
250 + 250 watts (6 ohms at
1kHz, 10% THD)
AEP, UK, CIS models
The following measured at AC 120, 127, 220, 240 V
50/60 Hz
DIN power output (rated): 144 + 144 watts (6 ohms at
1kHz, DIN)
Continuous RMS power output (reference):
180 + 180 watts (6 ohms at
1kHz, 10% THD)
Inputs
VIDEO/MD IN (phono jacks):
voltage 450/250 mV,
impedance 47 kilohms
Amplifier section
Outputs
PHONES (stereo mini jack):
accepts headphones of
8ohms or more
SPEAKER: accepts impedance of 6 to
16 ohms
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
Tape deck section
Recording system 4-track 2-channel, stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
Tuner 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
AM tuner section
Tuning range
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)
European and Russian models:
531 – 1,602 kHz (with the
tuning interval set at
9kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
COMPACT DISC DECK RECEIVER
AEP Model
UK Model
E Model
CX-JN77
Ver 1.0 2004.04
9-877-745-01 Sony Corporation
2004D05-1 Home Audio Company
© 2004.04 Published by Sony Engineering Corporation
SPECIFICATIONS
CX-JN77 is the amplifier, CD player, tape deck
and tuner section in JAX-N77/PK77.
Model Name Using Similar Mechanism NEW
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 NEW
Section Tape Transport Mechanism Type CWM43FR34
– Continued on next page –
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CX-JN77
2
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.
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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
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 PUB-
LISHED BY SONY.
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 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 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 oc-
cur 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.
General
Power requirements
European and Russian models:
230 V AC, 50/60 Hz
Mexican models: 127 V AC, 60 Hz
Other models: 120 V, 220 V or
230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption
European and Russian models:
180 watts
0.25 watts (at the Power
Saving Mode)
Other models: 170 watts
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.
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CX-JN77
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
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
6-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 25
6-5. Printed Wiring Board – CD Board – ............................. 26
6-6. Schematic Diagram – CD Board – ................................ 27
6-7. Printed Wiring Boards – CHANGER Section –............ 28
6-8. Schematic Diagram – CHANGER Section – ................ 29
6-9. 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) –................ 33
6-13. Schematic Diagram – MAIN Section (3/4) –................ 34
6-14. Schematic Diagram – MAIN Section (4/4) –................ 35
6-15. Printed Wiring Boards – MAIN Section – .................... 36
6-16. Printed Wiring Board – PANEL Section – .................... 37
6-17. Schematic Diagram – PANEL Section (1/2) – .............. 38
6-18. Schematic Diagram – PANEL Section (2/2) – .............. 39
6-19. Printed Wiring Board – POWERAMP Section –
(AEP, UK, CIS only)....................................................... 40
6-20. Schematic Diagram – POWER AMP Section –
(AEP, UK, CIS only)....................................................... 41
6-21. Printed Wiring Board – POWERAMP Section –
(E51, MX only) ............................................................... 42
6-22. Schematic Diagram – POWER AMP Section –
(E51, MX only) ............................................................... 43
6-23. Printed Wiring Boards – TRANS Section –
(AEP, UK, CIS only)....................................................... 44
6-24. Schematic Diagram – TRANS Section –
(AEP, UK, CIS only)....................................................... 45
6-25. Printed Wiring Boards – TRANS Section –
(E51, MX only) ............................................................... 46
6-26. Schematic Diagram – TRANS Section –
(E51, MX 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
E51 : Chilean and Peruvian models
MX : Mexican model
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4
CX-JN77
+
–
+
RLRL
–
– RearView –
PART No.
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 electro-
static 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 emis-
sion, 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.
•MODEL IDENTIFICATION
MODEL PART No.
AEP, UK models 4-253-949-0[]
CIS model 4-253-950-0[]
Chilean and Peruvian models 4-253-951-0[]
Mexican model 4-255-500-0[]
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5
CX-JN77
SERVICE POSITION
– 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
stand
CDMP3 CONNECT board
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6
CX-JN77
– AMP BOARD –
– FRONT PANEL SECTION –
MAIN board
PANEL board
front panel section
tape mechanism deck
SUB TRANS board
TRANS board
AMP board
MAIN board
front panel section
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7
CX-JN77
Main unit
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
ZPUSH (deck A) (eject) 0
Z(eject) wg
PUSH Z(deck B) (eject) wj
m(rewind) wl
x(stop) wl
hH (play) wl
X(pause) wl
M(fast forward) wl
ALPHABETICAL ORDER
A – N O – Z
BUTTON DESCRIPTIONS
+–
+
+
–
–
+–+–
+–
+
+
–
–
+–+–
Z Z
wd
wf
wg
wh
wk
4q
j
q
h
q
k
q
l
w
;
w
a
w
s
wj
1
qg
qf
qd
qs
0
qa
9
2
wl8
3 5 6 7
SECTION 2
GENERAL This section is extracted from
instruction manual.
•LOCATION OF CONTROLS
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8
CX-JN77
Use buttons on the remote for the operation.
1Press ?/1 to turn on the system.
2Press CLOCK/TIMER SET.
3Press .or >repeatedly to set the
hour.
4Press ENTER.
5Press .or >repeatedly to set the
minute.
6Press ENTER.
The clock starts working.
To adjust the clock
1Press CLOCK/TIMER SET.
2Press .or >repeatedly to select
“CLOCK SET”, then press ENTER.
3Do the same procedures as step 3 to 6
above.
Notes
•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
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 (power) 1
m/M (rewind/fast forward)
7
N(play) 8
X(pause) 8
x(stop) 8
–/+ (tuning) qh
./> (goback/go forward)
qh
ALPHABETICAL ORDER
A – E F–Z
BUTTON DESCRIPTIONS
4
5
6
7
8
9
q;
ws 1
qd
qg
qf
wa
w;
ql
qk
qj
qh
qa
qs
3
2
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CX-JN77
9
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
SET
3-2. CASE
(SIDE-L/R)
(Page 10)
3-3. CASE (TOP)
(Page 10) 3-4. TRAY PANEL (Page 11)
3-6. FRONT PANEL
BLOCK
(Page 12)
3-7. BACK PANEL
SECTION
(Page 12)
3-9. TAPE
MECHANISM
DECK
(CWM43FR34)
(Page 13)
3-8. MAIN BOARD
(Page 13) 3-14. CD BOARD (Page 16)
3-13. BASE UNIT
(BU-F1BD81A)
(Page 15)
3-10. TABLE ASSY
(Page 14)
3-11. MOTOR (TB)
BOARD
(Page 14)
3-12. MOTOR (LD)
BOARD
(Page 15)
3-5. CD MECHANISM DECK
(CDM74-F1BD81)
(Page 11)
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.
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CX-JN77
10
3-3. CASE (TOP)
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE (SIDE-L/R)
2 case (top)
1 two screws
(BVTP3
× 10)
4 case (side-L)
7 case (side-R)
6 two screws
(BVTP3 × 10)
3 two screws
(BVTP3 × 10)
1 two screws
(case 3 TP2)
5 three screws
(case 3 TP2)
2 screw
(case 3 TP2)
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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