Sony CX-JV77 User manual

SERVICE MANUAL
COMPACT DISC DECK RECEIVER
E Model
CX-JV77
Ver 1.0 2004.06
SPECIFICATIONS
•CX-JV77istheamplifier,CDplayer,tapedeck
and tuner section in JAX-V77.
– Continued on next page –
Model Name Using Similar Mechanism NEW
CD CD Mechanism Type CDM74-K4BD49
Section Base Unit Name BU-K4BD49
Optical Pick-up Block Name KSM-213DHAP
Tape deck Model Name Using Similar Mechanism NEW
Section Tape Transport Mechanism Type CWM43FR36
9-877-887-01
2004F05-1
© 2004.06
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
Main unit
Amplifier section
Front speaker
The following measured at AC 120, 127, 220, 240 V
50/60 Hz
DIN power output (rated): 120 + 120 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
150 + 150 watts
(6 ohms at 1 kHz, 10%
THD)
Inputs
VIDEO/SAT IN (phono jacks):
voltage 450/250 mV,
impedance 47 kilohms
MIC (phone jack): sensitivity 1 mV,
impedance 10 kilohms
Outputs
PHONES (stereo mini jack):
accepts headphones of
8ohmsormore
VIDEO OUT (phono jack):max. output level 1Vp-p,
unbalanced, Sync
negative, load impedance
75 ohms
VIDEO/SAT OUT (phono jacks):
impedance 1 kilohm
SPEAKER: accepts impedance of 6 to
16 ohms
SURROUND SPEAKER: accepts impedance of
24 ohms
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ=770 – 810 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
Video color system format NTSC, PAL
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 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
2 Band type:
Saudi Arabian models: 531 – 1,602 kHz
(with the 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)
3 Band type:
Middle Eastern models:
MW: 530 – 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
SW: 5.95 – 17.90 MHz
(with the tuning interval
set at 5 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
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CX-JV77
2
This appliance is
classified as a CLASS 1
LASER product. This
markingis locatedonthe
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
otherthanthose specifiedherein may resultinhazardousradiation
exposure.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR 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 PUBLISHED BY SONY.
General
Power requirements
Saudi Arabian model: 120 – 127/220 or
230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector
Other models: 120 V, 220 V or
230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption 155 watts
Dimensions (w/h/d) incl. projecting parts and controls
Amplifier/Tuner/Tape/CD section:
Approx. 280 ×325 ×
425 mm
Mass Approx. 11.0 kg
Design and specifications are subject to change
without notice
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CX-JV77
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-K4BD49)...................... 11
3-6. Front Panel Block ............................................................ 12
3-7. Back Panel Section .......................................................... 12
3-8. MAIN Board.................................................................... 13
3-9. Tape Mechanism Deck (CWM43FR36).......................... 13
3-10. Table Assy ....................................................................... 14
3-11. MOTOR (TB) Board ....................................................... 14
3-12. MOTOR (LD) Board ....................................................... 15
3-13. Base Unit (BU-K4BD49) ................................................ 15
3-14. BD49 Board..................................................................... 16
4. TEST MODE.............................................................. 17
5. ELECTRICAL ADJUSTMENTS
CD Section ...................................................................... 21
VIDEO Section................................................................ 22
6. DIAGRAMS
6-1. Block Diagram – CD SERVO Section – ........................ 23
6-2. Block Diagram – AUDIO/VIDEO CD Section – ........... 24
6-3. Block Diagram – MAIN Section –................................. 25
6-4. Block Diagram
– PANEL/POWER SUPPLY Section – ........................... 26
6-5. Printed Wiring Board – BD49 Board – .......................... 28
6-6. Schematic Diagram – BD49 Board – ............................. 29
6-7. Printed Wiring Boards – CHANGER Section – ............. 30
6-8. Schematic Diagram – CHANGER Section – ................. 31
6-9. Schematic Diagram – VMP43GY Board (1/2) –............ 32
6-10. Schematic Diagram – VMP43GY Board (2/2) –............ 33
6-11. Printed Wiring Board – VMP43GY Board –.................. 34
6-12. Printed Wiring Boards
– VCD CONNECT, VIDEO OUT Boards – ................... 35
6-13. Schematic Diagram
– VCD CONNECT, VIDEO OUT Boards – ................... 35
6-14. Schematic Diagram – MAIN Section (1/4) – ................. 36
6-15. Schematic Diagram – MAIN Section (2/4) – ................. 37
6-16. Schematic Diagram – MAIN Section (3/4) – ................. 38
6-17. Schematic Diagram – MAIN Section (4/4) – ................. 39
6-18. Printed Wiring Boards – MAIN Section – ..................... 40
6-19. Printed Wiring Board –PANEL Section – ...................... 41
6-20. Schematic Diagram – PANEL Section (1/2) – ............... 42
6-21. Schematic Diagram – PANEL Section (2/2) – ............... 43
6-22. Printed Wiring Board – POWER AMP Section – .......... 44
6-23. Schematic Diagram – POWER AMP Section – ............. 45
6-24. Printed Wiring Boards – TRANS Section – ................... 46
6-25. Schematic Diagram – TRANS Section – ....................... 47
7. EXPLODED VIEWS
7-1. Case Section .................................................................... 62
7-2. Tape Mechanism Deck Section ....................................... 63
7-3. Cassette Box Section ....................................................... 64
7-4. Front Panel Section ......................................................... 65
7-5. Back Panel Section .......................................................... 66
7-6. Chassis Section................................................................ 67
7-7. CD Mechanism Deck Section-1 (CDM74-K4BD49) ..... 68
7-8. CD Mechanism Deck Section-2 (CDM74-K4BD49) ..... 69
7-9. CD Mechanism Deck Section-3 (CDM74-K4BD49) ..... 70
7-10. Base Unit Section (BU-K4BD49) ................................... 71
8. ELECTRICAL PARTS LIST................................ 72
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4
CX-JV77 SECTION 1
SERVICING NOTES
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 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
Carry out the“S curve check” in “CDsection adjustment” and check
that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure :
While pressing the xkey, press the Zkey for 5 seconds. The
message “UNLOCKED” is displayed and the tray is unlocked.
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
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.
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5
CX-JV77
SERVICE POSITION
– CD MECHANISM DECK –
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.
3 Pull-out the disc tray.
2 Turn the loading gear
in the direction of arrow
A .
1 Remove the case (side-L).
A
CD mechanism deck
stand
VCD CONNECT board
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6
CX-JV77
– POWER 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
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7
CX-JV77
Main unit
ALBUM + wl
ALBUM – wl
BASS control 5
CD qk
CD SYNC qf
Deck A q;
Deck B e;
DISC 1 – 3 wf
DISC SKIP/EX-CHANGE wg
Disc tray wd
DISPLAY qj
Display window 4
ECHO LEVEL qa
ENTER 2
i-Bass qg
MIC jack ea
MIC LEVEL ea
MIDDLE control 5
Operation Dial (AMS/TUNING)
qh
P FILE 6
PHONES jack qd
PLAY MODE 7
PRESET EQ 3
REC PAUSE/START 9
Remote sensor ws
SURROUND 8
TAP E A/B w;
TREBLE control 5
TUNER/BAND ql
TUNING MODE 7
VIDEO/SAT wa
VOLUME control wj
?/1 (power)1
ZPUSH (deck A) (eject) qs
Z(eject) wh
PUSH Z(deck B) (eject) wk
m(rewind) wl
x(stop) wl
hH (play) wl
X(pause) wl
M(fast forward) wl
ALPHABETICAL ORDER
A – N O – Z
BUTTON DESCRIPTIO
+
–
+–+–+–
+
–
+–+–+–
wf
wg
wh
wj
wl
4qk ql w; wa
78
wd
wk
1
qj
qh
qg
qf
qs
qd
q;
2
e;
9
35 6 ws
ea
qa
NS
SECTION 2
GENERAL
•LOCATION OF CONTROLS
This section is extracted from
instruction manual.
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8
CX-JV77
Remote control
ALBUM +/– qa
CD wa
CLEAR qj
CLOCK/TIMER SELECT wh
CLOCK/TIMER SET wh
DISC SKIP q;
DISPLAY 3
ENTER qs
EQ qh
FM MODE 2
FUNCTION 4
KARAOKE/MPX qg
NEXT ql
Number buttons w;
ON SCREEN 6
PLAY MODE wf
PREV ql
REPEAT 2
SELECT 9
SLEEP wg
SPECIAL MENU 7
TAPE ws
TUNER BAND 5
TUNER MEMORY wd
TUNING MODE wf
VOLUME +/– qf
?/1 (power) 1
m/M (rewind/fast forward) 8
N(play) 9
X(pause) 9
x(stop) 9
KEY CONTROL
#/2 qd
RETURN Oqk
+/– ql (tuning)
./> (go back/go forward) ql
ALPHABETICAL ORDER
A – M N – Z
BUTTON DESCRIPTIONS
IONS
3
2
1
4
qg
qh
qj
qk
w;
ql
5
6
7
8
q;
qa
qd
qf
9
qs
wd
wf
ws
wa
wg
wh
Use buttons on the remote for the operation.
1 Press ?/1 to turn on the system.
2 Press CLOCK/TIMER SET.
3 Press .or >repeatedly to set the
hour.
4 Press ENTER.
5 Press .or >repeatedly to set the
minute.
6 Press ENTER.
The clock starts working.
To adjust the clock
1 Press CLOCK/TIMER SET.
2 Press .or >repeatedly to select
“CLOCK SET”, then press ENTER.
3 Do 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
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CX-JV77
9
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
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
(CWM43FR36)
(Page 13)
3-8. MAIN BOARD
(Page 13) 3-14. BD49 BOARD (Page 16)
3-13. BASE UNIT
(BU-K4BD49)
(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-K4BD49)
(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.
SECTION 3
DISASSEMBLY
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CX-JV77
10
3-3. CASE (TOP)
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)
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE (SIDE-L/R)
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