Sony WX-7700-MDX Service manual
WX-7700MDX
SERVICE MANUAL
Ver 1.0 2002.06
US and foreign patents licensed from Dolby
Laboratories.
CD
Section
MD
Section
E Model
Model Name Using Similar Mechanism NEW
CD Mechanism Type MG-398D-121
Optical Pick-up Name KSS-720A
Model Name Using Similar Mechanism NEW
MD Mechanism Type MG-164MF-138
Optical Pick-up Name KMS-241C
CD/MD Player section
Signal-to-noise ratio 95 dB
Frequency response 10 – 20,000 Hz
Wow and flutter Below measurable limit
Tuner section
FM
Tuning range FM tuning interval:
Aerial terminal External aerial connector
Intermediate frequency 10.7 MHz/450 kHz
Usable sensitivity 8 dBf
Selectivity 75 dB at 400 kHz
Signal-to-noise ratio 66 dB (stereo),
Harmonic distortion at 1 kHz
Separation 35 dB at 1 kHz/WIDE
Frequency response 30 – 15,000 Hz
50 kHz/200 kHz switchable
87.5 – 108.0 MHz
(at 50 kHz step)
87.5 – 107.9 MHz
(at 200 kHz step)
74 dB (mono)
0.4 % (stereo),
0.3 % (mono)
SPECIFICATIONS
AM
Tuning range AM tuning interval:
Aerial terminal External aerial connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity 30 µV
Power amplifier section
Outputs Speaker outputs
Speaker impedance 4 – 8 ohms
Maximum power outp ut 52 W × 4 (at 4 ohms)
General
Outputs Audio outputs (front/rear)
Inputs Telephone ATT control
9 kHz/10 kHz switchable
531 – 1,602 kHz
(at 9 kHz step)
530 – 1,710 kHz
(at 10 kHz step)
(sure seal connectors)
Subwoofer output (mono)
Power aerial relay control
terminal
Power amplifier control
terminal
terminal
Illumination control
terminal
BUS control input terminal
BUS audio input terminal
AUX IN terminal
Aerial input terminal
Power requirements 12 V DC car batt ery
Dimensions Approx. 178 × 100 × 194
Mounting dimensions Approx. 178 × 100 × 165
Mass Approx. 3.0 kg
Supplied accessories Parts for installation and
Note
This unit cannot be connected to a digital preamplifier
or an equalizer.
Design and specifications are subject to change
without notice.
(negative earth)
mm (w/h/d)
mm (w/h/d)
connections (1 set)
Card remote commander
RM-X110
9-874-054-01 Sony Corporation
2002F0500-1 e Vehicle Company
C 2002.06 Published by Sony Engineering Corporation
MULTI CONTROL AUDIO MASTER
WX-7700MDX
NOTES ON HANDLING THE OPTICAL PICKUP BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body .
During repair, pay attention to electrostatic breakdown 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.
FOR CD
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 objectiv e lens.
FOR MD
NOTES ON LASER DIODE EMISSION CHECK
Never look into the laser diode emission from right avove when
checking it for adustment. It is feared that you will lose your sight.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
(KMS-241C)
The laser diode in the optical pick-up block may suffer electrostatic break-down easily. When handling it, perform soldering
bridge to the laser-tap on the flexible board. Also perform
m easur es against electrostatic break-down suff iciently before the
operation. The flexible board is easily damaged and should be
handled with care.
laser-tap
OPTICAL PICK-UP FLEXIBLE BOARD
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.
Notes on CD-R/CD-RW discs
•You can pl ay CD-Rs (recordabl e CD s)/CDRWs (rewritable CDs) designed for audio use
on this unit.
Look for these marks to distinguish CD-Rs/
CD-RWs for audio use.
These marks denote that a disc is not for audi o
use.
•Some CD-Rs/CD-RWs (depending on the
equipment used for its r ecording or the
condition of the disc) m ay not play on this unit.
•You cannot play a CD-R/a CD-RW that is not
finalized*.
*
A process necessary for a recorded CD-R/CD-RW
disc to be played on the audio CD player.
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 viscous (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.
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.
2
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.
TABLE OF CONTENTS
WX-7700MDX
1. SERVICING NOTES ................................................ 4
2. GENERAL
Location of Controls ....................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow........................................................... 10
3-2. Front Panel Section......................................................... 11
3-3. DISPLAY Board ............................................................. 11
3-4. Chassis (T) Section ......................................................... 12
3-5. MD Mechanism Deck (MG-164MF-138)...................... 12
3-6. POWER Board, Chassis (T) Assy .................................. 13
3-7. Heat Sink......................................................................... 13
3-8. SERVO (MD) Board ....................................................... 14
3-9. MD Cover Assy ............................................................... 14
3-10. Float Block ...................................................................... 15
3-11. LO Motor Assy................................................................ 15
3-12. Lever Assy (LE) .............................................................. 16
3-13. Holder Assy..................................................................... 16
3-14. Chucking ARM Assy ...................................................... 17
3-15. Optical Pick-up (KMS-241C)......................................... 17
3-16. SL Motor Assy (SLED) (M902)/
SP Motor Assy (SPINDLE) (M901)............................... 18
3-17. CD Mechanism Deck (MG-398D-121).......................... 18
3-18. Motor Assy (Front Panel Open/Close) (M640).............. 19
3-19. MAIN Board, Chassis (B) Assy ..................................... 19
3-20. Bracket (MAIN) .............................................................. 20
3-21. Chassis (T388) Assy ....................................................... 20
3-22. Sensor (CD) Board.......................................................... 21
3-23. Servo Board, LO Motor SUB Assy (Loading)
(M103)............................................................................. 21
3-24. ARM Roller Assy, LOAD Board.................................... 22
3-25. Floating Block Assy........................................................ 22
3-26. Optical Pick-up (KSS-720A), Sled Motor Assy
(M101)............................................................................. 23
5-20. Printed Wiring Boards
– DISPLAY Board (Conductor Side) – .......................... 43
5-21. Schematic Diagram – DISPLAY Board (1/2) – ............. 44
5-22. Schematic Diagram – DISPLAY Board (2/2) – ............. 45
5-23. Printed Wiring Board
– KEY Board (Component Side) –................................. 46
5-24. Printed Wiring Board
– KEY Board (Conductor Side) –................................... 47
5-25. Schematic Diagram – KEY Board – ............................. 48
5-26. Schematic Diagram – SUB/POWER Boards – ............. 49
5-27. Printed Wiring Board
– POWER Board (Component Side) – ........................... 50
5-28. Printed Wiring Boards – POWER Board
(Conductor Side)/SUB Board – ...................................... 51
5-29. IC Pin Function Description ........................................... 63
6. EXPLODED VIEWS
6-1. MAIN Section ................................................................. 78
6-2. SUB Panel SUB Assy Section ........................................ 79
6-3. Front Panel Section......................................................... 80
6-4. Front Panel SUB Section ................................................ 81
6-5. DISPLAY Board Section ................................................ 82
6-6. Chassis (T) Assy Section ................................................ 83
6-7. Chassis (B) Assy Section-1............................................. 84
6-8. Chassis (B) Assy Section-2............................................. 85
6-9. MD Mechanism Deck Section-1 (MG-164MF-138) ..... 86
6-10. MD Mechanism Deck Section-2 (MG-164MF-138) ..... 87
6-11. MD Mechanism Deck Section-3 (MG-164MF-138) ..... 88
6-12. CD Mechanism Deck Section-1 (MG-398D-121) ......... 89
6-13. CD Mechanism Deck Section-2 (MG-398D-121) ......... 90
6-14. CD Mechanism Deck Section-3 (MG-398D-121) ......... 91
7. ELECTRICAL PARTS LIST ............................... 92
4. ASSEMBLY
4-1. Assembly of ARM (L/R) Assy ....................................... 23
5. DIAGRAMS
5-1. Block Diagram – CD SERVO Section – ....................... 24
5-2. Block Diagram – MD SERVO Section – ...................... 25
5-3. Block Diagram – MAIN Section –................................ 26
5-4. Block Diagram
– DISPLAY/BUS CONTROL Section – ........................ 27
5-5. Block Diagram – POWER SUPPLY Section – ............. 28
5-6. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 29
5-7. Printed Wiring Boards – CD Section (1/2) – ................ 30
5-8. Printed Wiring Board – CD Section (2/2) – .................. 31
5-9. Schematic Diagram – CD Section –.............................. 32
5-10. Printed Wiring Boards – MD Section –......................... 33
5-11. Schematic Diagram – MD Section (1/2) – .................... 34
5-12. Schematic Diagram – MD Section (2/2) – .................... 35
5-13. Printed Wiring Boards
– MAIN Board (Component Side) – .............................. 36
5-14. Printed Wiring Board
– MAIN Board (Conductor Side) – ................................ 37
5-15. Schematic Diagram – MAIN Board (1/4) – ................... 38
5-16. Schematic Diagram – MAIN Board (2/4) – ................... 39
5-17. Schematic Diagram – MAIN Board (3/4) – ................... 40
5-18. Schematic Diagram – MAIN Board (4/4) – ................... 41
5-19. Printed Wiring Board
– DISPLAY Board (Component Side) – ........................ 42
3
WX-7700MDX
)
SECTION 1
SERVICING NOTES
TEST DISC
This set can playback a CD-R, CD-RW for audio use.
When test this set, use the following test disc.
Test disc for CD-R: TCD-R082LMT (Part No.: J-2502-063-1)
Test disc for CD-RW: TCD-W082L (Part No.: J-2502-063-2)
OPENING AND CLOSING OF FRONT PANEL SECTION IN AN ELECTRIC INTERRUPTION STATE
Don't apply impossible power, but open and close slowly with both hands.
front panel section
JIG ON REPAIRING
When repairing this set, etc., connect the extension cable as the figure shown below.
extension cable (main board-power board)
(J-2502-067-1)
CNP370
CN403
extension cable (main board-servo (CD) board
(J-2502-062-1)
CN331
CN1
4
Location of controls
Card remote commander RM-X110
SECTION 2
GENERAL
WX-7700MDX
This section is extracted from
instruction manual.
2
5
MODE
+
DISC
SOURCE
–
DISC
+
VOL
OPEN/CLOSE
3
6
LIST
+
SEEK
ENTER
ATTOFF
SCRL
DSPL
REP SHUF
1
4
EQ7 DSO
MENU
–
SEEK
SOUND
–
Instructions in this manual describe how
to use the unit by mainly using the card
remote commander.
(DISC) (M):
to select upwards
+
DISC
(SEEK) (<):
to select
leftwards
In Menu mode, the currently selectable button(s) of
these four are indicated with a “ v” in the display.
Note
If the unit is turned off by pressing (OFF) for 2
seconds, the unit cannot be operated with the card
remote commander unless (SOURCE) on the unit is
pressed, or a disc is inserted to activate the unit first.
Tip
Refer to “Replacing the lithium battery” for details on
how to replace the batteries.
SOURCE
–
SEEK
–
DISC
(DISC) (m):
to select downwards
(SEEK) (,):
+
SEEK
to select
rightwards
a SCRL (scroll) button
b DSPL (display mode change) button
c Number buttons
(1) REP
(2) SHUF
To store station s/ r eceive stored stations.
d EQ7 button
e MENU button
To display the menus.
f SOURCE (Power on/Radio/CD/MD/
AUX-Audio) button
To select the source.
g SEEK (</,) buttons
To skip tracks/fast-f orward, reverse a track/
tune in stations automatically, find a station
manually/select a setting.
h SOUND button
i OFF (Stop/Power off) button
j VOL ( +/–) buttons
To turn up or down the volume.
k
OPEN/CLOSE button
l MODE button
To change the operation.
m DSO button
n LIST button
o DISC (M/m) buttons
To receive preset stations/change the disc*/
select an item in Menu.
* When an optional CD/MD unit is connected.
p ENTER button
To enter a setting.
q ATT button
5
WX-7700MDX
Controls of the unit
ANGLE
ATT
DISC AMS
The buttons on the unit share the same
functions as those on the car d re mote
commander.
a ANGLE button
b Sound window
c SOURCE button
d MODE button
e VOL (+/–) button
f Operation window
g Receptor for the card remote
commander
h OPEN/CLOSE button
i ATT button
j Reset button
k Frequency select switch (located on the
bottom of the unit)
See “Frequency sel ect switch” in the
Installation/Con nections manual.
l DISC (–/+) button s
m AMS (. m/M >) buttons
AMS (. m/M >) buttons share
the same functions as SEEK (</,)
buttons on the card remote commander.
n OFF (Stop/Power off) button*
OPEN/
CLOSE
VOL
MODE
SOURCE
OFF
WX-7700MDX
* Warning when installing in a car without
an ACC (accessory) position on the
ignition switch
After turning off the ignition switch, be sure to
press (OFF) on the unit for 2 seconds to turn
off the clock display.
Otherwise, the clock display does not turn off
and this causes battery drain.
6
Display windows
Sound window Operation window
WX-7700MDX
ANGLE
VOL
MODE
SOURCE
DISC AMS
ATT
OPEN/
CLOSE
OFF
a DSO
Lights up while you are set t in g t he DSO
mode.
b POS
Lights up while you are set t in g t he POS
mode.
c DISC number
Appears only when an optional CD/MD unit
is connected and a disc in the optional un it is
played.
d Track number
Appears during CD/MD playback.
Level meter
(volume)
1
2
ANGLE
VOL
MODE
SOURCE
DISC AMS
ATT
This manual illustrates the
operation window mainly.
OPEN/
CLOSE
OFF
e Various items for a setting or a source
f Cursor directions
The selectable cu rsor direction appear s as a
“v”.
By pressing a cursor button (M/,/m/<) in
the same direction as any “v” that appears,
you can select an item or proceed with the
operation.
g
ENTER
Appears when it's necessary to press
(ENTER)
after you select an item.
7
WX-7700MDX
2
SUBWOOFER OUT
A
(MONO)
AUDIO OUT
B
Source selector
XA-C30
(REAR)
BUS AUDIO IN
BUS CONTROL IN
*
AUDIO OUT
(FRONT)
BUS AUDIO IN
Cautions
• This unit is designed for negative earth 12 V
DC operation only.
• Do not get the wires under a screw, or caught
in moving parts (e.g. seat railing).
• Before making connections, turn the car
ignition off to avoid short circuits.
• Connect the yellow and red power input leads
only after all other leads have been connected.
• Run all earth wires to a common earth
point.
• Be sure to insulate any loose unconnected
wires with electrical tape for safety.
Notes on the power supply cord (yellow)
• When connecting this unit in combination with
other stereo components, the connected car
circuit’s rating must be higher than the sum of
each component’s fuse.
• When no car circuits are rated high enough,
connect the unit directly to the battery.
Parts Iist (1)
The numbers in the list are keyed to those in the
instructions.
Connection example (2)
Notes
(2-A)
• Be sure to connect the earth lead before
connecting the amplifier.
• If you connect an optional power amplifier and do
not use the built-in amplifier, the beep sound will
be deactivated.
Tip
(2-B- )
For connecting two or more changers, the source
selector XA-C30 (optional) is necessary.
Connection diagram (3)
When inserting each connector, be sure to insert
securely, as vibration through driving may
cause a poor connection.
1
To a metal surface of the car
Make sure to connect the black earth lead first of
all, then proceed with connection steps 2-7.
Check the black earth lead is connected properly,
before connecting the orange/white striped lead,
yellow and red power input leads.
2
To AMP REMOTE IN of an optional power
amplifier
This connection is only for amplifiers. Connecting
any other system may damage the unit.
3
To the power aerial control lead or power supply
lead of aerial booster amplifier
Notes
•It is not necessary to connect this lead if there
is no power aerial or aerial booster, or with a
manually-operated telescopic aerial.
•When your car has a built-in FM/AM aerial in
the rear/side glass, see “Notes on the control
and power supply leads.”
4
To the interface cable of a car telephone
5
To a car’s illumination signal
Be sure to connect the black earth lead to it first.
6
To the +12 V power terminal which is energized
in the accessory position of the ignition key
switch
Notes
• If there is no accessory position, connect to the
+12 V power (battery) terminal which is
energized at all times.
Be sure to connect the black earth lead to it
first.
•When your car has a built-in FM/AM aerial in
the rear/side glass, see “Notes on the control
and power supply leads.”
7
To the +12 V power terminal which is energized
at all times
Be sure to connect the black earth lead to it first.
Notes on the control and power supply leads
• The power aerial control lead (blue) supplies +12 V
DC when you turn on the tuner.
•When your car has built-in FM/AM aerial in the
rear/side glass, connect the power aerial control
lead (blue) or the accessory power input lead (red)
to the power terminal of the existing aerial
booster. For details, consult your dealer.
•A power aerial without relay box cannot be used
with this unit.
Memory hold connection
When the yellow power input lead is connected,
power will always be supplied to the memory circuit
even when the ignition key is turned off.
Notes on speaker connection
• Before connecting the speakers, turn the unit off.
• Use speakers with an impedance of 4 to 8 ohms,
and with adequate power handling capacities to
avoid its damage.
• Do not connect the speaker terminals to the car
chassis, or connect the terminals of the right
speakers with those of the left speaker.
• Do not connect the earth lead of this unit to the
negative (–) terminal of the speaker.
•Do not attempt to connect the speakers in parallel.
• Connect only passive speakers. Connecting active
speakers (with built-in amplifiers) to the speaker
terminals may damage the unit.
• To avoid a malfunction, do not use the built-in
speaker wires installed in your car if the unit shares
a common negative (–) lead for the right and left
speakers.
• Do not connect the unit’s speaker cords to each
other.
BUS CONTROL IN
*
not supplied
8
WX-7700MDX
3
4
*
RCA pin cord
Left
Right
Left
SUBWOOFER OUT
(MONO)
1
*
BUS CONTROL IN
1
Supplied with XA-C30
*
AUX IN
2
*
3
4
Black
White
White/black striped
Grey
Grey/black striped
Green
Green/black striped
Fuse (10 A)
L
R
AUX IN
AUDIO OUT
(FRONT)
AUDIO OUT
(REAR)
L
R
REAR
Blue/white striped
Blue
Light blue
Orange/white striped
Red
Source selector
XA-C30
FRONT BUS AUDIO
AUDIO OUT IN
Supplied with the CD/MD changer
BUS AUDIO IN
RCA pin cord
*
Max. supply current 0.3 A
AMP REM
ANT REM
Max. supply current 0.1 A
ILLUMINATION
1
ATT
from car aerial
2
3
4
5
6
*1 not supplied
2
*
Connect the Bus cable to its
terminal with the unit’s V mark and
the Bus cable’s v mark aligned.
3
*
supplied with the auxiliary
equipment
4
*
Auxiliary optional equipment such
as portable DVD player (not
supplied)
4 A
TOYOTA/MITSUBISHI
This illustration is for TOYOTA cars.
1
or
2
max. size 5 × 8 mm
Precautions
• Choose the installation location carefully so
that the unit will not interfere with normal
driving operations.
• Avoid installing the unit in areas subject to
dust, dirt, excessive vibration, or high
temperatures, such as in direct sunlight or near
heater ducts.
• Use only the supplied mounting hardware for
a safe and secure installation.
To open/close the front panel smoothly, to insert/
eject a disc easily, and especially to drive safely, a
certain distance between the front panel and the
shift lever is necessary. The necessary distance
differs, depending on the shift lever position of
your car. Before installing the unit, choose the
installation location carefully so that you can
drive safely.
Shift lever
Mounting angle adjustment
Adjust the mounting angle to less than 30°.
88 mm
Right
Bracket
Existing parts supplied with your car
Purple
Purple/black striped
WX-7700MDX
to dashboard/centre console
Bracket
Frequency select switch
The AM (FM) tuning interval is factory-set to the
9 k (50 k) position. If the frequency allocation
system of your country is based on 10 kHz (200
kHz) interval, set the switch on the bottom of
the unit to the 10 k (200 k) position before
making connections.
After the frequency select switch is set, you must
press the reset button to reset the unit.
Yellow
B
NISSAN
1
or
max. size 5 × 8 mm
1
or
2
max. size 5 × 8 mm
Mounting the unit in a Japanese
car (4)
You may not be able to install this unit in some
makes of Japanese cars. In such a case, consult
your Sony dealer.
When mounting this unit to the preinstalled
brackets of your car, use the supplied screws 1
or 2 in the appropriate screw holes, according
to your vehicle: T for TOYOTA, M for
MITSUBISHI, and N for NISSAN.
Notes
• Use the screws 1 or 2 depending on the make of
•To prevent malfunction, be sure to install using
• Do not apply excessive force to the buttons of the
• Do not push on the display window.
• Before mounting, make sure there is nothing on
N
T
M
M
T
N
T
T
N
N
T
N
M
car. When this unit is attached to a MITSUBISHI car,
use the supplied screws 2.
brackets and the supplied screws 1 or 2.
unit.
the top of the unit.
7
2
Bracket
3
Existing parts supplied with your car
Warning when installing in a car
without ACC (accessory)
position on the ignition key
switch
Be sure to press (OFF) on the unit for two
seconds to turn off the clock display after
turning off the engine.
When you press (OFF) only momentarily, the
clock display does not turn off and this causes
battery wear.
WX-7700MDX
to dashboard/centre console
Bracket
Reset button
When the installation and connections are
completed, be sure to press the reset button with
a ballpoint pen, etc.
ANGLE
DISC AMS
ATT
Reset button
Note
When you connect the power supply cord to the
unit or reset the unit, wait for about 10 seconds
before you insert a disc. If you insert a disc within
these 10 seconds, the unit will not be reset, and you
will have to press the reset button again.
1
or
2
max. size 5 × 8 mm
VOL
MODE
SOURCE
OPEN/
CLOSE
OFF
9
WX-7700MDX
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
SET
3-2. FRONT PANEL
SECTION
(Page 11)
3-4. CHASSIS (T) SECTION
(Page 12)
3-5. MD MECHANISM DECK
(MG-164MF-138)
(Page 12)
3-6. POWER BOARD,
CHASSIS (T)
ASSY
(Page 13)
3-7. HEAT SINK
(Page 13)
3-8. SERVO (MD)
3-9. MD COVER ASSY
3-10. FLOAT BLOCK
3-11. LO MOTOR ASSY
3-12. LEVER ASSY (LE)
Note 1: The process can be removed in every turn in the .
Note 2: Unless finishes all processes in the , it cannot progress to the following process.
3-3. DISPLAY BOARD
(Page 11)
3-17. CD MECHANISM DECK
(MG-398D-121)
(Page 18)
BOARD (Page 14)
(Page 14)
(Page 15)
(Page 15)
(Page 16)
3-18. MOTOR ASSY
(FRONT PANEL OPEN/
CLOSE) (M640)
(Page 19)
3-19. MAIN BOARD,
CHASSIS (B)
ASSY
(Page 19)
3-20. BRACKET
(MAIN)
(Page 20)
3-21. CHASSIS (T388)
ASSY
(Page 20)
3-23. SERVO (CD)
BOARD, LO
MOTOR SUB ASSY
(LOADING) (M103)
(Page21)
3-24. ARM ROLLER
ASSY,
LOAD BOARD
(Page 22)
3-22. SENSOR (CD)
BOARD (Page 21)
3-13. HOLDER ASSY
(Page 16)
3-14. CHUCKING ARM ASSY
(Page 17)
3-15. OPTICAL PICK-UP
(KMS-241C)
(Page 17)
3-16. SL MOTOR ASSY
(SLED) (M902)/
SP MOTOR ASSY
(SPINDLE) (M901)
(Page 18)
3-25. FLOATING BLOCK
ASSY
(Page22)
3-26. OPTICAL PICK-UP
(KSS-720A),
SLED MOTOR ASSY
(M101)
(Page23)
10
Note: Follow the disassembly procedure in the numerical order given.
w
3-2. FRONT PANEL SECTION
1
tapping screw
3
guide panel (L)
2
two screws
(PTT2.6 × 6)
4
roller
(guide)
5
spring
(guide)
8
torsion spring
(fulcrum: R)
qa
6
ornamental
screw
7
front panel section
8
sleeve
torsion spring
(fulcrum: L)
5
spring
(guide)
4
9
cover
(flexible)
roller
(guide)
6
ornamental
screw
7
sleeve
0
key connection
flexible board
WX-7700MDX
3
guide panel (R)
1
tapping scre
2
two screws
(PTT2.6 × 6)
3-3. DISPLAY BOARD
3
four claws
5
flaxible frat cable (7P)
(CN711)
1
two screws
(P2
×
6
tapping screws
7
display board
5)
2
two tapping screws
4
front back panel
3
three claws
3
two claws
11
WX-7700MDX
n
3-4. CHASSIS (T) SECTION
3
two screws
(PTT2.6
×
6)
2
connector (CN400)
1
flexible flat cable (40P)
(CN403)
4
chassis (T) sectio
3
two screws
(PTT2.6
×
6)
3-5. MD MECHANISM DECK (MG-164MF-138)
1
4
MD mechanism deck (MG-164MF-138)
two screws
(PTT2.6
×
5)
1
two screws
(PTT2.6
×
5)
2
Rifting up the MD mechanism deck.
12
3
flexible flat cable (30P)
(CN402)
3-6. POWER BOARD, CHASSIS (T) ASSY
)
)
2
four ground point screws
3
power board
1
two screws
(PTT2.6 × 6
WX-7700MDX
4
chassis (T) assembly
3-7. HEAT SINK
2
heat sink
1
four screws
(PTT2.6 × 10
power board
13
WX-7700MDX
d
3-8. SERVO (MD) BOARD
2
two screws
(BVTT2 × 4)
1
sensor connection
flexible board
(CN103)
1
MD flexible board
(CN101)
2
two screws
(BVTT2 × 4)
3
servo (MD) boar
1
flexible board
(CN103)
3-9. MD COVER ASSY
3
MD cover assy
casset holder
ring (MD cover guide)
1
four screws
(B2
×
3)
14
A
2
Pushing the cassette holder in the direction of arrow A with a screwdriver,
disengage the shaft (MD cover guide) from the groove of MD cover ass’y.
Note : Be careful not to damage the optical pick-up
when pushing the cassette holder with a screwdriver.
3-10. FLOAT BLOCK
float block
A
3
Pushing an arrow A part, raise the float block
up ward at the front to release a lock.
1
tension spring (float B)
5
two damper assies
6
float block
WX-7700MDX
5
two damper assies
lock open
3-11. LO MOTOR ASSY
1
Remove solders of motor (M903)
lever (lock R)
lever (lock L)
2
two tension springs (float F)
4
Remove the bracket (LO)
in the direction of arrow
A
4
1
tension spring (float B)
.
5
A
LO motor ass’y (loading)
(M903)
2
tension spring (rack)
3
claw
– bottom view –
bracket (LO)
15
WX-7700MDX
)
3-12. LEVER ASSY (LE)
2
stopper washer
1
3
4
roller (gear E)
lever (LE) ass’y
3-13. HOLDER ASSY
7
type-E stopring 1.5
4
spring (CHKG)
5
type-E stopring 1.5
6
lever (lock R)
8
Remove the holder ass’y in the
direction of the arrow.
7
type-E stopring 1.5
16
3
lever (lock L)
2
type-E stopring 1.5
1
spring (CHKG
y
y
3-14. CHUCKING ARM ASSY
holder ass’y
1
Remove the chucking arm ass’
in the direction of the arrow.
WX-7700MDX
3-15. OPTICAL PICK-UP (KMS-241C)
7
optical pick-up (KMS-241C)
1
two screws
(K2 × 3)
2
guide shaft (OPT L)
4
screw
(B2 × 3)
6
bearing (SL)
5
feed screw ass’
3
screw
(K2 × 3)
17
WX-7700MDX
)
3-16. SL MOTOR ASSY (SLED) (M902)/SP MOTOR ASSY (SPINDLE) (M901)
5
screw
×
1.8)
(P1.7
0
two screws
×
1.8)
qa
bracket (SP)
qs
SP motor ass’y
(spindle) (M901)
(P1.7
6
7
SL motor ass’y
(sled) (M902)
8
screw
×
(B2
9
base (SL)
bracket (SL)
3)
3
screw (PS2 × 8)
2
screw (PS2 × 4)
4
sensor (MD) board
3-17. CD MECHANISM DECK (MG-398D-121)
5
CD mechanism deck (MG-398D-121)
4
bracket (CD)
1
two screws
(PTT2.6
2
1
Remove solders of motors
(M901, M902)
×
6)
3
connector
(CNP370)
two screws
(PTT2.6
×
6
18
1
two screws
(PTT2.6
×
6)
2
two screws
(PTT2.6
×
6)
2
four screws
(PTT2.6
×
6)
8
cord (with connector) (RCA)
qa
cord (with connector)
(ANT)
0
connector
(CN1)
9
Remove a solder of earth wire.
qs
main board
1
key connection flexible board
(CN670)
4
ground point screw
5
Remove the main board
from the chassis (B) assy.
6
chassis (B) assy
3
rear panel
7
connector
(CN3)
3-18. MOTOR ASSY (FRONT PANEL OPEN/CLOSE) (M640)
8
motor assy (front panel open/close) (M640)
5
Remove the bracket (motor) assy
in the direction of arrow.
4
two screws
(PTT2.6 × 6)
1
connector
(CN640)
7
two screws
(P2 × 2.5)
2
ground point screw
WX-7700MDX
3
heat sink
3-19. MAIN BOARD, CHASSIS (B) ASSY
6
harness
19
WX-7700MDX
)
3-20. BRACKET (MAIN)
2
Remove a solder of bracket (main).
4
bracket (main)
1
four screws
(PTT2.6
×
6
3-21. CHASSIS (T388) ASSY
1
Remove three solders
of lead wire from sensor board.
2
two screws
(PTT2
×
3)
main board
3
Bend three claws.
3
two screws
(PTT2
4
chassis (T388) assy
×
3)
20
black
blue
red
d
3-22. SENSOR (CD) BOARD
WX-7700MDX
two claws
1
2
3
guide (disc M)
4
special screw
5
sensor (CD) boar
3-23. SERVO BOARD, LO MOTOR SUB ASSY (LOADING) (M103)
2
Remove two solders of lead wire
of loading motor.
4
servo board
5
screw
×
3)
(P2
6
LO motor sub assy
(loading) (M103)
3
three screws
(PS2
2
×
4)
1
pick-up flexible board
(CN2)
Remove five solders of lead wire
of sensor board and load board.
1
motor frexible board (CN3)
21
WX-7700MDX
3-24. ARM ROLLER ASSY, LOAD BOARD
3
retaining ring
(RA)
7
special screw
8
load board
6
Remove two solders of lead wire
from load board.
yellow
black
4
shaft retainer
(roller)
shaft retainer (roller)
retaining ring
(RA)
1
tension spring (RA)
arm (roller)
washer
5
arm roller assy
2
arm (roller)
arm (roller)
shaft retainer
(roller)
washer
3-25. FLOATING BLOCK ASSY
8
compression spring
(FL)
1
tension spring (KF1)
5
Turn loading ring in the direction of arrow.
3
damper (T)
6
floating block assy
7
compression spring
(FL)
4
Slide the lever (D) in the direction of arrow.
2
damper (T)
22
)
SECTION 4
PHASE ALIGNMENT
WX-7700MDX
3-26. OPTICAL PICK-UP (KSS-720A), SLED MOTOR ASSY (M101)
1
2
sled motor assy
(M101)
7
shaft (feed) assy
two screws
(PS2
×
3)
5
two screws (PS2 × 3)
6
plate spring (feed)
4
pick up flexible board
3
optical pick-up (KSS-720A
Note: Follow the assembly procedure in the numerical order given.
4-1. ASSEMBLY OF ARM (L/R) ASSY
2
drive shaft assy
1
Pull the arm (L) assy
in the direction of arrow
at the full.
OK NG
3
three screws
(PS2.6 × 4)
1
Pull the arm (R) assy in the direction of arrow
at the full.
2323
WX-7700MDX
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM – CD SERVO Section –
DETECTOR
A
B
C
D
I-V AMP
A
B
C
D
B
84
A
82
D
85
C
83
RFO
77
AGCI
76
RF AMP,
FOCUS/TRACKING ERROR AMP,
DIGITAL SIGNAL PROCESSOR,
DIGITAL SERVO PROCESSOR,
DIGITAL FILTER, D/A CONVERTER.
CD-TEXT
IC1
AGCO
• SIGNAL PATH
: CD PLAY
EFM
75
RFI
74
71
ASY
72
DOUT
SCKO
LRCK
XTAL
EMPH
30
32
34
24
27
CD-DATA
CD-BCK
CD-LRCK
IC3
CD CLOCK
SWITCH
IC503
CD-DATA,
CD-BCK,
CD-LRCK
BFOT
CDM ON
CD EMPH
A
B
C
D
(Page 26)
(Page 26)
(Page 28)
(Page 26)
E
F
LASER DIODE
PICK-UP BLOCK
(KSS-720A)
2-AXIS DEVICE
(FOCUS)
(TRACKING)
PD LD
OPTICAL
PD
FCS+
FCS–
TRK+
TRK–
E
F
LD
AUTOMATIC
POWER
CONTROL
M101
(SLED)
Q1
M
87
86
98
LD
FOCUS/TRACKING COIL DRIVE,
16
15
17
18
14
13
FEO
E
F
SLED/SPINDLE/LOADING
VO4–
VO4+
VO3+
VO3–
VO1+
VO1–
91
TEO
93
97
PD
MOTOR DRIVE
IC2
OPIN4–
OPIN3–
IN1
FE–
90
TE2
TE–
92
26
23
5
94
TEC
95
FD
62
TD
63
SD
64
SCK
TSI
TSO
TSOI
TSCK
RFOK
PACK
STB
TSTB
RST
7
SO
8
SI
6
54
53
39
55
2
52
5
56
4
A0
3
DISC IN DETECT
D12, Q6
DISC SIZE
(8cm/12cm) DETECT
D11, Q7
LOADING
COMPLETION DETECT
D10, Q8
SW3
(DISC SET)
SW1
(SELF)
CD SI/TSI
25
CD SO/TSO
26
CD CKO/TCKO
27
CD RFOK
59
CD PACK
64
CD STB
37
CD TSTB
41
CD A0
36
CD XRST
35
MASTER CONTROLLER
(CD MECHANISM CONTROLLER)
IC550 (1/4)
CD PH1
60
CD PH2
66
CD PH3
61
CD DSW
62
CD SELFSW
67
M102
(SPINDLE)
M103
(LOADING)
11
M
M
VO2–
12
VO2+
10
VOL+
9
VOL–
FWD
REV
IN2
6
1
2
MD
65
SW4
(LIMIT)
68
57
58
CD LIMIT
CD LM LO
CD LM EJ
2424
5-2. BLOCK DIAGRAM – MD SERVO Section –
OPTICAL PICK-UP BLOCK
(KMS-241C)
F
C B
I J
A
D
E
DETECTOR
LDPD
LASER DIODE
ILCC
I
J
B
A
C
D
E
F
RM
AUTOMATIC
POWER CONTROL
Q302
48 47
MORFI
MORFO
I
1
RF AMP
J
2
A
4
B
5
I-V
C
AMP
6
D
7
E
8
I-V
F
AMP
9
APC
LD/PD
11
10
AMP
PD
RFO
46 40
B.P.F.
3T
TEMP
WBL
AT
B.P.F.
AMP
ABCD
AMP
COMMAND
SERIAL/PARALLEL
CONVERTER,
DECODER
APCREF
12
SWDT
EFM/ACIRC ENCODER/DECODER,
SHOCK PROOF MEMORY CONTROLLER,
FOCUS/TRACKING ERROR AMP
AGCI
WBL
PEAK &
BOTTOM
ADFM ADIN
SCLK
181716
FOCUS
ERROR AMP
TRACKING
ERROR AMP
XLAT
3029
EQ
CONVERTER
DIGITAL SIGNAL PROCESSOR,
ATRAC ENCODER/DECODER
IC301 (1/2)
RF AMP,
IC302
RF
V-I
RF AGC
& EQ
EQ
3T
WBL
AUX
PEAK
BOTM
ADFG
ABCD
F0CNT
38
33
37
36
32
35
FE
34
TE
26
SE
28
20
FILTER
100
60
59
62
61
53
54
57
78
79
EFMO
FILI
PCO
CLTV
FILO
ASYO
ASYI
RFI
ADFG
F0CNT
PLL
COMPA-
RATOR
ADIP
DEMODULATOR/
DECODER
+3.3V
SPINDLE
SERVO
SPFD
94 93
PROCESSOR
SPRD
15
EFM/ACIRC
ENCODER/DECODER
SUBCODE
DQSY11SQSY14XINT
12
LEVEL SHIFT
IC502 (1/2)
TX
SHOCK PROOF
MEMORY CONTROLLER
CPU
INTERFACE
SENS
SRDT
SWDT
9 8 5 6 7
17
111315
975
3
SAMPLING
CONVERTER
ATRAC
DIGITAL
AUDIO
INTERFACE
ENCODER/DECODER
INTERNAL BUS
SCLK
XLAT
RATE
MONITOR
CONTROL
MNT0
MNT1
1 2 3 4
246
LEVEL SHIFT
IC502 (2/2)
181614
ADDT
DATAI
XBCKI
LRCKI
DIN0
DIN1
DOUT
DADT
MNT2
MNT3
8
12
WX-7700MDX
• SIGNAL PATH
: MD PLAY
25
22
24
23
19
20
21
MD-DATA, MD-BCK, MD-LRCK
DIVIDER
IC304
512FS
E
F
(Page 26)
(Page 26)
28
2927
LRCK
XBCK
FS256
CLOCK
GENERATOR
MD-DATA
MD-BCK
MD-LRCK
OSCI
OSCO
XOE
XWE
XRAS
XCAS
16
17
D0 – D3A00 – A09
49, 48, 50, 5134 – 31, 36 – 40, 45
43
47
46
44
DELAY BUFFER
IC306
D0 – D3
1, 2, 24, 25
D-RAM
IC307
A00 – A09
9 – 12, 14 – 18, 5
22
OE
3
WE
RAS
4
CAS
23
26
2-AXIS
DEVICE
(TRACKING)
FCS+
(FOCUS)
FCS–
TRK+
TRK–
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC303
M901
M902
(SLED)
MM
M
(SPINDLE)
FOK
SLOCK
XBUSY
TH501
X501
10MHz
Q301
ABCD
FE
AUX1
ABCD
ANALOG MUX
A/D CONVERTER
FROM CPU
INTERFACE
AUTO
SEQUENCER
3159
32 2664 27 28 2945
XTAL
EXTAL
MD-RST
TE
SE
PEAK
BOTM
XLRF
80
CKRF
81
DTRF
82
EJECT
LOAD
7 6
5 4
FIN
RIN
LOADING
MOTOR DRIVE
IC305
OUT1
OUT2
1 7
62 55 5254 51
39
SQSY
TEMP
6
VREF
SENS
CC-XINT
LIMIT-IN
(LIMIT)
REFERENCE VOLTAGE
REGULATOR
Q303
M
M903
(LOADING)
PEAK HOLD
16
PSB
OUT4F
6
OUT4R
8
OUT2F
27
OUT2R
25
OUT1F
21
23
OUT1R
OUT3F
12
10
OUT3R
IN4R
IN4F
IN2F
IN2R
IN1F
IN1R
IN3F
IN3R
SPFD
3
SPRD
4
29
30
19
18
14
15
83 13 67 65 66 75 74 63 64
10
XRST
APCREF
SFDR
92
SRDR
91
FFDR
88
FRDR
89
86
85
PWM GENERATOR
TFDR
TRDR
RECP
AUTOMATIC
POWER
CONTROL
DIGITAL SERVO
SIGNAL
PROCESS
DIGITAL SERVO
SIGNAL PROCESSOR
IC301 (2/2)
MD-SI
SCLK
SWDT
MD-SO
E-SW
LOADING
END
XLAT
MD-CKO
SHOCK
MNT0
MNT1
MNT2
MD-LAT
MD MECHANISM CONTROLLER
C-SW
631156
LOADING START/
LO +12V
MNT3
IC501 (1/2)
EJECT END
DEEMP
MDM-ON
MD-ON
66
10
65
MD EMPH
MD-ON, MDM-ON
G
H
(Page 26)
(Page 28)
2525
WX-7700MDX
5-3. BLOCK DIAGRAM – MAIN Section –
A
(Page 24)
(Page 25)
E
(Page 24)
B
F
(Page 25)
BUS AUDIO
J
(Page 27)
CD-DATA,
CD-BCK,
CD-LRCK
MD-DATA,
MD-BCK,
MD-LRCK
BFOT
512FS
PNJ2
AUX IN
PNJ1 (1/2)
IN
ANT
SP SI,
SP CLK
R-CH
DSP +3.3V
(FOR DIGITAL)
77
XMST
71
SI1
75
BCK
76
LRCK
35
LIN
46
RIN
58
BFOT
81
PLCKL
FD2L+
7
FD1L+
3
AM
11
AMIF
12
MPX
13
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER,
D/A CONVERTER
IC500
XLAT
RVDT59SCK
62 57
XLAT
SCK
RVDT
IC300 (1/2)
LOUDNESS/
VOLUME
PLL
REDY
6061
REDY
CANCELATION
TRDT
63
TRDT
INPUT SELECTOR, FM MPX
INPUT
MULTIPLEXER
AM/FM
NOISE
BLANKER
L.P.F.
11 10
EE SIO
EE CKO
XRST
DSPRST
PILOT
PILOT
DET
AOUTL1
AOUTR1
AOUTR3
AOUTL3
AOUTR2
XTLI38
XTLO38
XECKSTP64XS24
82
XECSKTP
27
29
54
52
43
41
40
SOFT
MUTE
QUAL
QUALITY
17
FL-OUT
RL-OUT
FR-OUT
R-CH
RR-OUT
R-CH
SUB-OUT
X500
16.9344MHz
TONE
CONTROL
LOUDNESSMUTE
DEMODULATOR
+STEREO ADJUST
+STEREO BLEND
MULTIPATH
DETECTOR
MPOUT16MPIN
15
53
VSM
LOW-PASS
FILTER
IC200
LOW-PASS
FILTER
IC101
OUTPUT
SELECTOR
L.P.F.
CONVERTER
R-CH
ACOUTL
38
TO
S & H HIGH-CUT
D/A
LEVEL
14
ACINLF
34
ACINLR
33
SWINL
36
35
SWINR
DIGITAL
CONTROL
IIC BUS
SDA
20
70 71
I2CSIO
R-CH
SCL
21
SM
I2CCKO
OUTPUT
18
ELECTRICAL VOLUME
IC300 (2/2)
MONO FADER MIXER
SELECTOR
SUBWOOFER
+PHASE CONTROL
XMST
TRDT
RVDT
SCK
XLAT
REDY
DSPRST
XECKSTP
SP SI
SP CLK
(CD MECHANISM CONTROLLER)
OUTLF
OUTLR
OUTSWL
MONO
OUTSWR
FADER
7
D AUDSEL
31
VOLATT
DSPMST
29
20
DSPSI
DSPSO
21
22
DSPCKO
DSPLAT
3
76
DSPREDY
4
DSPRST
28
DSPPLL
MASTER CONTROLLER
IC550 (2/4)
30
29
26
25
AMPON
TESTIN
TELMUTE
BEEP
R-CH
FL
K
(Page 27)
PNJ1 (2/2)
LINE
AMP
IC102
LINE
AMP
IC104
R-CH
LOW-PASS
FILTER
IC103
BZ300
BUZZER
DRIVE
Q307
15
120
84
16
115EMPH IN
LEVEL SHIFT
Q310
• R-ch is omitted due to same as L-ch.
MUTING
Q104
MUTING
Q203
MUTING
Q103
CENTER VOLTAGE
GENERATOR
(FOR BIAS)
IC303
MUTING
Q100
R-CH
MUTING
Q201
R-CH
BATTERY OFF
MUTE DRIVER
Q306
AUDIO +8V
FL
IN1
11
FR
12
IN2
RL
13
IN3
RR
IN4
14
MUTE
22
ST-BY
4
D304
MUTING CONTROL
MUTING CONTROL
R-CH
R-CH
R-CH
POWER AMP
IC402
BATT B+
SWITCH
Q305
SWITCH
Q303
D371
OUT1+
OUT1–
OUT2+
OUT2–
OUT3+
OUT3–
OUT4+
OUT4–
• SIGNAL PATH
: CD PLAY
D552
9
7
5
3
17
19
21
23
(L)
FRONT
(R)
(L)
REAR
(R)
(L)
SUB WOOFER
OUT (MONO)
(R)
CNP400 (1/2)
MUTE
CD EMPH
MD EMPH
AUDIO OUT
2
1
3
4
10
9
11
12
13
TEST
14
ATT
(Page 27)
(Page 24)
(Page 25)
FL+
FL–
FR+
FR–
RL+
RL–
RR+
RR–
L
D
G
: MD PLAY
: FM
: AM
B+ SWITCH
CD/MD
SELECTOR
IC504
MPX
16
11
3A
VCC
10
3B
2
1A
3
1B
5
2A
6
2B
SEL
8
10
12
13
17
18
14
CD-DATA
MD-DATA
CD-BCK
MD-BCK
CD-LRCK
MD-LRCK
(L)
(R)
(L)
(R)
R-CH
R-CH
AM ANT IN
1
2
FM ANT IN
TUNER UNIT
TU1
DAT-EEP
CKL-EEP
S-METER
AM DET
DAT IIC
CKL IIC
Q501
9
3Y
4
1Y
7
2Y
1
XMST
: BUS AUDIO IN
: AUX IN
2626
WX-7700MDX
5-4. BLOCK DIAGRAM – DISPLAY/BUS CONTROL Section –
(Page 26) (Page 28)
FL
K
ILLON
M
LIQUID CRYSTAL
DISPLAY
LCD740
LIQUID CRYSTAL
DISPLAY
LCD741
BACK UP +5V
BACK UP +5V
FRONT PANEL
OPEN/CLOSE MOTOR DRIVE
IC641
M
M640
FRONT PANEL
OPEN/CLOSE
3
14
82-87, 91-101, 110-132
1-12, 18, 45, 51-53, 62-78,
54-61
79-81, 88-90
13-17, 19-25, 46-50,
133-140
53-80, 105-140
1-8
RESET SIGNAL
GENERATOR
IC551
RESET SIGNAL GENERATOR
(FOR INTERNAL RAM)
IC552
12
45
VCC
MOTOR
DRIVE
M BATT
OUT1
OUT2
SW800
(RESET)
VOLTAGE SWITCH
VREF
OPEN
CLOSE
RNF
SEG1 – SEG15,
SEG17 – SEG75
1 – 15, 17 – 75
83 – 76
COM1 – COM8
LIQUID CRYSTAL
DISPLAY DRIVER
LIQUID CRYSTAL
DISPLAY DRIVER
SEG1 – SEG15,
1 – 15, 17 – 56,
58 – 62, 68 – 75
83 – 76
COM1 – COM8
REGULATOR
REFERENCE
Q640, 641
6
11
16
LCD-DATA
LCD-CLK
LCD-CE1
LCD-INH
IC740
IC741
LCD-DATA
LCD-CLK
LCD-CE0
LCD-INH
SEG68 – SEG75
SEG17 – SEG56,
SEG58 – SEG62,
+7V
IC640
MOTOR OVER LOAD
DETECT
IC642, Q642
OSC
OSC
100
99
98
97
96
100
99
98
97
96
90
86
85
BATT B+
OSC
C746, R751
OSC
C740, R742
RSTX
HSTX
RAMBU
D640
DATA
CLK
CE1
INH
DATA
CLK
CE0
INH
FP CTRL
40
MOT+
98 97
BACK UP +5V
MOT–
IDET
96
CLOSE SW
OPEN SW
S640
S641
S640
FRONT PANEL
OPEN DETECT
S641
FRONT PANEL
CLOSE DETECT
FRONT PANEL VIEW
BUFFER
IC701
B+ SWITCH
Q792
LED749 – 758
(LCD BACK LIGHT)
FP PULSE
75100 99
ANGLE SENSOR
IC553
PULL UP +5V
PEAK DETECT
IC790
PEAK HOLD
RESET SWITCH
Q790
LED DRIVE
(COLOR SWITCHING)
Q747 – 749
MASTER CONTROLLER
(CD MECHANISM CONTROLLER)
IC550 (3/4)
X1
X0A
X1A
92
93
74
73
X550
32.768kHz
X551
3.6864MHz
SAMPLING
TIMER
IC791
X0
LSW803 – 813,
DATA
CLK
CE0
CE1
INH
KEYIN047KEYIN1
46
LSW801,
S820, 821
60
LCD SO/TX
64
LCD CLK
66
LCD CE0
LCD CE1
70
69
LCD INH
DISPLAY CONTROLLER
IC710
ILLON
52
LVL L
105
R-CH
D639
LVL R
106
PEAK RST
24
LVL RD
29
PWM B
120
PWM G
121
PWM R
122
SCHMITT
TRIGGER
D713
6 1
SYSRST
SIRCS B+
D551
D550
IC712
KEYACK
79
SP SI
SP CLK
SP-LAT
LINKOFF
UNISO
UNISI
UNICKI
BUSON
NMI
BU IN
BOOT
EXTAL
XTAL
RES
81
KEY ACTIVE
SWITCH
Q551
61
63
33
50
97
98
101
38
82
34
D714
57
86
85
18.432MHz
BACK UP +5V
DATA
CLK
BUS-ON
BU CHECK
X701
80
SP CLK
BOOT
AD ON
SP SI
SP SI,
SP CLK
MUTE
D301
67 A-ATT
MD MECHANISM
CONTROLLER
IC501 (2/2)
RESET
30
FP DATA
5101
ATT
UNISO
18
SP LATCH
UNISI
UNICKO
BUSON
BU IN
SIRCS RST
SIRCS
DATA
17
CLK
19
BUS-ON
14
BU CHECK
78
82
24
MD DATA
FP DATA
UNISO
UNISI
UNICKI
BUS-ON
BU-IN
D636
D637
SIRCS
CONTROLLER
IC660
50
49
48
61
60
SONY BUS INTERFACE
RESET
13
DATA
IN
9
DATA
OUT
8
CLK
IN
11
BUS
ON
12
BU
CHECK
10
6
RESET
D3/K GO/INT
17
XOUT
4
X660
4MHz
DATA
CLK
BUS-ON
BU CHECK
IC630
RESET
SWITCH
BUS ON
SWITCH
BATTERY
CHECK
SIRCS B+
1
VDD
XIN
3
BATT B+
MD DATA
RST
2
DATA
6
D638
CLK
4
BUS
ON
1
BATT
9
Q632
3
D631
BUS ON
BUS ON/OFF
BATTERY CHECK
REMOTE CONTROL
D781, IC780
J
L
TH630
CN630
BUS CONTROL IN
(FOR SONY BUS)
BATT B+
SWITCH
Q632
Q631
RECEIVER
N
(Page 26)
(Page 26)
7
BATT
2
RESET
5
DATA
4
CLK
6
BUS ON
D635
(Page 28)
BATT B+
2727
WX-7700MDX
5-5. BLOCK DIAGRAM – POWER SUPPLY Section –
95
ILLIN
ACCIN
PACK-IN
TUNON
POWON
DSPON
SUBP ON
MASTER CONTROLLER
(CD MECHANISM CONTROLLER)
IC550 (4/4)
MD ON
81
116
118
83
2
105
77
MD-ON
MDM-ON
Q820
MD SECTION
D820, Q820
MD DISC IN
DETECT SENSOR
DSP (IC500) B+
(FOR ANALOG)
DSP (IC500) B+
(FOR DIGITAL)
MD BACK UP
B+
PULL UP +5V,
D820
+5V B+
+5V
LO +12V
B+ 3.3V
DRIVER +5V
D/D +5V
VCC
+3.3V REGULATOR
IC401, Q401
B+ SWITCH
Q500
+3.3V REGULATOR
IC502
+3.3V REGULATOR
IC501
B+ SWITCH
Q402, 403
B+ SWITCH
Q413, 414
TUNER
SECTION B+
+12V REGULATOR
Q416
REGULATOR
CONTROL SWITCH
Q415
TUNER
BACK UP +5V
TUNER +8.5V
TUNER +5V
AUDIO +10V
AUDIO +8V
D801-803,
LSW805-812
(FOR ILLUMINATION)
LSW801, 803
LSW804, 813
(FOR ILLUMINATION)
ILL ON
LCD B+
D821-826
(FOR ILLUMINATION)
D406
+5V REGULATOR
µCOM +5V,
BACK UP +5V
Q2
D404
CONTROL SWITCH
D405
P ON
LED B+
ILL ON
LED B+
SUB ON
LED B+
REGULATOR
Q406, 407
REGULATOR
Q409, 410
+8.5V REGULATOR
IC2
+8V REGULATOR
IC301
B+ SWITCH
Q676
B+ SWITCH
Q672, 673
B+ SWITCH
Q674, 675
B+ SWITCH
Q417
VOLTAGE
DETECT
IC403
POWER CONTROL
IC400
IN2
ERROR
14
3
IN1
CT
AMP
ERROR
AMP
ACCIN
OSC
ILLIN
PWM
COMPARATOR
PWM
COMPARATOR
DIMMER DETECT
SWITCH
Q308
ACCESSORY CHECK
Q304
OUT2
OUTPUT
CIRCUIT
OUT1
OUTPUT
CIRCUIT
VCC
TH401
TH400
ANTENNA REMOTE
B+ SWITCH
Q313-2, 314-2
AMP REMOTE
B+ SWITCH
Q313-1, 314-1
10
7
91
D412
D414
D413
DC/DC
CONVERTER
Q450, 451
SWITCHING
REGULATOR
Q408
CNP400 (2/2)
(POWER)
15
7
6
5
16
BATT B+
ILL
ACC
AMP REM
ANT REM
B+
(Page 27)
(Page 25)
(Page 24)
OUT2
OUT1
VCC
SWITCHING
REGULATOR
Q405
10
7
9
DC/DC
CONVERTER
IC302
D422
B+ SWITCH
Q400
REGULATOR
Q310, 311
BUSON
N
(Page 27)
DRIVER +6V
CD SECTION
B+
CD ON +5V
49
CD ON
CDM ON
55
WAKEUP
106
114
FSW SFT
FSW IN
65
M
H
C
ILLON
MD-ON, MDM-ON
CDM ON
+6V REGULATOR
Q375, 376
REGULATOR
CONTROL SWITCH
Q374
+5V REGULATOR
Q373
REGULATOR
CONTROL SWITCH
Q372
D400
D411, 413
BUS ON WAKE UP
SWITCH
Q402
POWER CONTROL
IC401
IN2
14
ERROR
IN1
ERROR
3
AMP
AMP
CT
OSC
1RT2
PWM
COMPARATOR
PWM
COMPARATOR
OSC
SWITCH
Q403
LINE AMP
OUTPUT
CIRCUIT
OUTPUT
CIRCUIT
B+
TO
B–
2828
WX-7700MDX
d
5-6. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
f
•
• C : panel designation.
Note: The components identified by mark 0 or dotted line
• A : B+ Line.
• B : B– Line.
•Power voltage is dc 14.4V and fed with regulated dc power
•Voltages and waveforms are dc with respect to ground
•Voltages are taken with a VOM (Input impedance 10 MΩ).
•Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
: internal component.
with mark 0 are critical for safety.
Replace only with part number specified.
supply from ACC and BATT cords.
under no-signal (detuned) conditions.
– SERVO (CD)/MAIN/DISPLAY/SUB/POWER Boards –
no mark : FM
(): AM
[]: CD PLAY
〈〈 〉〉 : MD PLAY
{ } : Front panel open/close motor is operating
– SERVO (MD) Board –
no mark : MD PLAY
Voltage variations may be noted due to normal production tolerances.
Voltage variations may be noted due to normal production tolerances.
F : FM
f : AM
J : CD PLAY
E : MD PLAY
L : BUS AUDIO IN
a : AUX IN
: Impossible to measure
∗
: Impossible to measure
∗
4
W or less unless otherwise
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
z
•
•
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
: Through hole.
f
: internal component.
• Circuit Boards Location
sensor (MD) board
servo board
key board
power boar
display board
sub board
SL SW board
sensor (CD) board
load board
servo (CD) board
main board
2929
WX-7700MDX
5-7. PRINTED WIRING BOARDS – CD Section (1/2) – • See page 29 for Circuit Boards Location.
A
D
1
2 3 4 5 6 7 8 9 10 11
12
13
PICK-UP
C43
C16
C10
C9
C8
FLEXIBLE BOARD
1
C11
C15
C14
IC1
OPTICAL
PICK-UP
BLOCK
(KSS-720A)
LOAD BOARD
(DISC SET)
R5
C13
C20
C18
76100
C19
R9
75
C23
R8
C24
YEL
BLK
1-659-837-
SENSOR (CD) BOARD
D10
LOADING
COMPLETION DETECT
11
(11)
RED
BLU
BLK
SW1
(SELF)
D12
DISC IN
DETECT
SERVO (CD) BOARD
(COMPONENT SIDE)
B
R54
C
A
MAIN BOARD
CNP370
CN1
(Page 37)
CN2
R18
C41
16
C5
C1
R29
C3
C17
1
C29
C4
R17
R19
Q1
R26
FB1
R30
C
E
B
R3
C6
C40
C25
C45
G
H
54
IC3
R55
312
C34
C55
DISC IN
DETECT
25
26
C36
R52
Q6
R7
1
R6
7
C22
8
C21
14
R53
R24
R25
R51
R50
FB4
IC2
C38
FB2
51
C35
50
28
R15
R12
22
R10
C30
21
15
R14
1-682-831-
BLU
BLK
BLK
RED
YEL
SL SW BOARD
(LIMIT)
M102
(SPINDLE)
M
RED
BLK
1-676-708-
11
(11)
M
M101
(SLED)
YEL
WHT
D11
DISC SIZE
(8cm/12cm) DETECT
SW4
11
(11)
1-660-797-
(11)
• Semiconductor
Location
Ref. No. Location
D10 E-9
D11 E-10
D12 C-13
IC1 D-6
IC2 G-6
IC3 E-5
Q1 B-5
31
E
JR51
F
RED
M103
(LOADING)
M
WHT
LOADING
COMPLETION
DETECT
Q8
Q8
(8cm/12cm) DETECT
JR52
R20
JR50
FB3
DISC SIZE
C44
Q7
16
CN3
MOTOR FLEXIBLE BOARD
Q6 F-6
Q7 H-3
I
Q8 H-2
3030
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