Sony CXBK-2 Service manual
CX-BK2
SERVICE MANUAL
Ver 1.1 2004.02
CX-BK2 is the amplifier, CD player
and tuner section in BMZ-K2.
Licensed by BBE Sound, Inc. under USP4638258, 5510752 and
5736897.
CD
Section
US Model
Model Name Using Similar Mechanism CX-BK1
CD Mechanism Type CDM69BV-30CBD64NS
Base Unit Name BU-30CBD64NS
Optical Pick-up Name A-MAX.3
TUNER
FM tuning range 87.5 MHz to 108 MHz
FM usable sensitivity (IHF) 13.2 dBf
FM antenna terminal 75 Ω (unbalanced)
AM tuning range 530 kHz to 1710 kHz (10 kHz step)
531 kHz to 1710 kHz (9 kHz step)
AM usable sensitivity 350 µV/m
AM antenna Loop antenna
AMPLIFIER
Power output 160 W + 160 W (40 Hz - 20 kHz,
THD less than 1%, 6 Ω)
200 W + 200 W (40 Hz - 20 kHz,
THD 10%, 6 Ω)
Total harmonic distortion 0.08 % (120 W, 1 kHz, 6 Ω)
Input LINE IN VIDEO: 1.0 Vp-p (75 Ω)
LINE IN AUDIO: 1.1 V
AUX (MD) IN: 1.1 V
Outputs SPEAKERS: 6 Ω or more
PHONES: 32 Ω or more
AUX (MD) OUT: 500 mV
VIDEO OUT: 1.0 Vp-p (75 Ω)
SPECIFICATIONS
CD PLAYER
Laser Semiconductor laser (λ = 800 nm)
Emission duration: continuous
D/A converter 1 bit dual
Signal-to-noise ratio 85 dB (1 kHz, 0 dB)
Wow and flutter Unmeasurable
GENERAL
Power requirements 120 V AC, 60 Hz
Power consumption 145 W
Power consumption in standby mode
with ECO mode on: 0.25 W
with ECO mode off: 24 W
Dimensions (w/h/d) Approx. 211 × 379 × 419 mm
(8 3/8 × 15 ×16 5/8 in.)
Mass Approx. 9.6 kg (21 lbs 3 oz)
Specifications and external appearance are subject to change
without notice.
9-877-424-02 Sony Corporation
2004B05-1 Home Audio Company
C 2004.02 Published by Sony Engineering Corporation
COMPACT DISC DECK RECEIVER
CX-BK2
r
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.
The following caution label is located inside the unit.
This appliance is classified
CLASS 1 LASER PRODUCT
LUOKAN 1 LASER LAITE
KLASS 1 LASER APPARAT
as a CLASS 1 LASER
product.
This label is located on the
rear exterior.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT -540A. Follo w the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V A C range are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
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 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.
AC
1.5 k
0.15 µF
Fig. A. Using an AC voltmeter to check AC leakage.
Ω
Earth Ground
voltmete
(0.75 V)
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIA GRAMS
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.
2
TABLE OF CONTENTS
CX-BK2
1. SERVICING NOTES ................................................ 4
2. GENERAL
Location of Controls ....................................................... 6
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 8
3-2. Panel ................................................................................ 9
3-3. Top Panel ......................................................................... 9
3-4. Front Panel Assy ............................................................. 10
3-5. MAIN Board ................................................................... 10
3-6. Rear Cover....................................................................... 11
3-7. Tuner (FM/AM) .............................................................. 11
3-8. SPEAKER Board ............................................................ 12
3-9. ACDC Board, Power T ransformer.................................. 12
3-10. AMP Board ..................................................................... 13
3-11. CD Mechanism Deck (CDM69BV-30CBD64NS)......... 13
3-12. Base Unit Section ............................................................ 14
3-13. Base Unit (BU-30CBD64NS)......................................... 14
3-14. BD Board......................................................................... 15
3-15. SW (1) Board, SW (2) Board, SW (3) Board,
SW (4) Board, Bracket (Top) Assy................................. 15
3-16. CONNECTOR Board ..................................................... 16
3-17. Motor (Stocker) Assy (Stocker) (M761) ........................ 16
3-18. Motor (Roller) Assy (Roller) (M781)............................. 17
3-19. Motor (Mode) Assy (Mode) (M771) .............................. 17
3-20. Rubber Roller (Slider) Assy ........................................... 18
3-21. Timing Belt (Front/Rear) ................................................ 18
3-22. Cam (Gear) ...................................................................... 19
3-23. SENSOR Board ............................................................... 19
4. ASSEMBLY
4-1. How to Install the Cam (Eject Lock).............................. 20
4-2. How to Install the Cam (Gear)........................................ 20
4-3. How to Install the Gear (Mode C) .................................. 21
4-4. How to Install the Gear (Mode Cam) ............................. 21
4-5. How to Install the Rotary Encoder (S702),
Gear (Stocker Communication) ...................................... 22
4-6. How to Install the Stocker Assy...................................... 22
7-17. Schematic Diagram – AMP Board (1/2) – .................... 44
7-18. Schematic Diagram – AMP Board (2/2) – .................... 45
7-19. Printed Wiring Board – AMP Board – .......................... 46
7-20. Printed Wiring Board – HEADPHONE Board – .......... 47
7-21. Schematic Diagram – HEADPHONE Board – ............. 47
7-22. Printed Wiring Board – SPEAKER Board – ................. 48
7-23. Schematic Diagram – SPEAKER Board – .................... 49
7-24. Printed Wiring Boards – KEY Section – ....................... 50
7-25. Schematic Diagram – KEY Section – ........................... 51
7-26. Printed Wiring Boards – LCD Section – ....................... 52
7-27. Schematic Diagram – LCD Section – ........................... 53
7-28. Printed Wiring Board – ACDC Board – ........................ 54
7-29. Schematic Diagram – ACDC Board – ........................... 55
7-30. Printed Wiring Board – PT Board – .............................. 56
7-31. Schematic Diagram – PT Board – ................................. 57
7-32. IC Pin Function Description ........................................... 63
8. EXPLODED VIEWS
8-1. Panel Section ................................................................... 69
8-2. Front Panel Block-1 ........................................................ 70
8-3. Front Panel Block-2 ........................................................ 71
8-4. Front Panel Block-3 ........................................................ 72
8-5. Chassis Block-1............................................................... 73
8-6. Chassis Block-2............................................................... 74
8-7. CD Mechanism Deck Section-1
(CDM69BV-30CBD64NS) ............................................. 75
8-8. CD Mechanism Deck Section-2
(CDM69BV-30CBD64NS) ............................................. 76
8-9. CD Mechanism Deck Section-3
(CDM69BV-30CBD64NS) ............................................. 77
8-10. CD Mechanism Deck Section-4
(CDM69BV-30CBD64NS) ............................................. 78
8-11. CD Mechanism Deck Section-5
(CDM69BV-30CBD64NS) ............................................. 79
8-12. CD Mechanism Deck Section-6
(CDM69BV-30CBD64NS) ............................................. 80
8-13. Optical Pick-up Section (BU-30CBD64NS) .................. 81
10. ELECTRICAL PARTS LIST ............................... 82
5. TEST MODE.............................................................. 23
6. ELECTRICAL ADJUSTMENTS
CD Section ...................................................................... 24
7. DIAGRAMS
7-1. Block Diagram – CD Section – ..................................... 27
7-2. Block Diagram – TUNER//USB Section – ................... 28
7-3. Block Diagram – AMP Section – .................................. 29
7-4. Block Diagram – POWER SUPPLY Section – ............. 30
7-5. Note for Printed Wiring Boards
and Schematic Diagrams ................................................ 31
7-6. Printed Wiring Board – BD Board – ............................. 32
7-7. Schematic Diagram – BD Board – ................................ 33
7-8. Printed Wiring Boards – CHANGER Section –............ 34
7-9. Schematic Diagram – CHANGER Section – ................ 35
7-10. Printed Wiring Board – MAIN Board – ........................ 37
7-11. Schematic Diagram – MAIN Board (1/4) – .................. 38
7-12. Schematic Diagram – MAIN Board (2/4) – .................. 39
7-13. Schematic Diagram – MAIN Board (3/4) – .................. 40
7-14. Schematic Diagram – MAIN Board (4/4) – .................. 41
7-15. Printed Wiring Board – USB AUX Board –.................. 42
7-16. Schematic Diagram – USB AUX Board –..................... 43
3
CX-BK2
SECTION 1
SER VICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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 objectiv e 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.
SERVICE POSITION
– CD mechanism deck –
• In checking the CD mechanism deck section, prepare three extension jigs (Part No. J-2501-242-A:1.00 mm 11core/
Part No. J-2501-245-A: 1.00 mm 23 core/Part No. J-2501-248-A: 1.00mm 27 core).
Note: The CD mechanism deck of this model is a vertical type and putting it vertically as shown in the figure is the standard position.
When checking signals such as RF waveforms, operate it with the CD mechanism deck in the standard position as shown below.
Connect the extension jig (J-2501-248-A)
to the connector board (CN701) and
the main board (CN901).
Connect the extension jig (J-2501-245-A)
to the BD board (CN102) and
the main board (CN902).
Connect the extension jig (J-2501-242-A)
to the BD board (CN104) and the main board (CN507).
4
– main board, ACDC board –
• For connecting the CD mechanism deck, prepare three extension jigs. (Refer to “– CD mechanism deck –”)
AMP board
speaker board
front panel section
PT board
CX-BK2
ACDC board
main board
tuner unit
CD mechanism deck
5
CX-BK2
!
• LOCATION OF CONTROLS
SECTION 2
GENERAL
This section is extracted from
instruction manual.
Main unit: front
1
2
3
4
5
6
7
8
9
0
1 POWER 6STANDBY/ON
Switches the unit on and off (standby).
2 FUNCTION
Switches the active function among CD, USB, TUNER,
VIDEO and AUX.
3 BAND
Select tuner function and the tuner band.
4 GEQ
Selects a sound equalization curve.
i-Bass
Produces rich and clear low frequency sound.
5 TREBLE/MIDDLE
Adjusts the treble or middle range level.
BASS
Adjusts the bass level.
6 PLA Y MODE
Selects various CD play mode.
7 TUNING DOWN f/r, UPg /t
CD: skips to a previous or a succeeding track when
pressed, searches a track in fast forward or reverse
@
#
$
%
^
&
*
playback when held down.
Tuner: manually tunes up or down within the band.
8 USB terminal
Accepts sound signals from a personal computer.
Connect your personal computer to this terminal with a
USB cable so that the unit can output the sound of an
audio file which is played back by the Winamp3 on your
computer.
Be sure to see “CONNECTING A PERSONAL
COMPUTER” on page 18 for the details about the
computer requirements, how to connect and so on before
actually connecting your computer.
9 LINE IN (VIDEO/AUDIO) jacks
Accepts analog signals from external equipment.
Connect using an optional connecting cable with RCA
phono plugs (red plug to R jack, white plug to L jack,
yellow plug to VIDEO jack).
Refer also to the operating instructions of your equipment.
To switch function to external input, press FUNCTION
repeatedly to display “VIDEO”.
0 zEJECT
Ejects the disc(s).
! DISC SELECT (1-5)
Selects a disc slot.
Starts CD play for one desired disc.
@ VOLUME
Adjusts the volume.
# TITLE
When the unit is turned off: activates or deactivated
DEMO.
Changes the display in MP3-CD or USB source.
DISPLAY
Changes the display in CD playback mode.
Turns the back light on and off when the unit is turned
off.
MODE
Selects various modes (sound adjustment, etc.) when
used in combination with ENTER and MULTI JOG.
Switches the ECO mode on and off when the unit is turned
off.
$ a PAUSE/SET
Pauses CD play.
sSTOP/CLEAR
Stops CD play.
cPRESET
Starts CD play.
% MULTI JOG
When used in combination with ENTER and MULTI JOG,
CD: selects a track.
Tuner: selects a preset station.
^ ENTER
Fixes the modes and the time (clock and timer, etc.) when
used in combination with ENTER and MULTI JOG.
& PHONES jack
Plug in optional headphones set with a stereo mini plug
(∅3.5 mm). Speaker output is canceled.
* ALBUM/PLAY LIST k,i
Skips to a previous or succeeding album or play list.
Main unit: rear
1 AM LOOP jack and FM 75 Ω terminal
Plug in the supplied AM and FM antennas.
2 AUX IN jacks
Accept analogue sound signals from external equipment.
Connect external equipment using an optional connecting
cable with RCA phono plugs (red plug to R jack, white
1
2
3
4
5
6
plug to L jack). Refer also to the operating instructions
for your equipment.
To switch function to external input, press FUNCTION
repeatedly to display “AUX”.
3 AUX OUT jacks
Analog sound signals for all functions can be output
through these jacks. Use a cable with RCA phono plugs
to connect audio equipment.
Connect the red plug to the R jack, and the white plug to
the L jack.
However, the signal is not output when the function is
“VIDEO” or “AUX”.
4 VIDEO OUT
Signals from VIDEO IN jack output through this jack.
5 #SPEAKERS terminals
Connect the speaker cords of the supplied speakers.
AC power cord
6
6
CX-BK2
Remote commander
1
2
3
4
5
6
7
Buttons with the same or similar names on the main unit
basically have the same function.
1 POWER
2 1-9, 0/10, +10
CD: selects a track of the specified number.
Tuner: tunes in the station with the specified preset
number.
The numbered buttons take on these functions when
pressed with SHIFT held down.
BAND
SPECTRUM
Changes the spectrum analyser display.
TUNER MODE
Switches between stereo or monaural FM reception.
GEQ
8
9
0
!
@
3 c/d
Starts CD play.
s
a
f/g
r/ tPRESET
Tuner: selects a preset station.
M/ N ALBUM
Selects a previous or a succeeding album.
4 PLAY MODE
REPEAT
Selects repeat CD playback mode.
5 CLOCK/TIMER SET
Enters clock and timer setting mode.
CLOCK/TIMER SELECT
Switches timer setting on and off.
6 DISPLAY
SOUND
Selects bass, treble or middle range level setting mode.
CLEAR
Clears a track of the CD programed playback and a tuner
preset station.
7 SHIFT
Hold down when pressing a numbered button to change
its function to that printed above the number.
8 FUNCTION
9 DISC SKIP
Changes a disc slot.
0 ENTER
! SLEEP
Selects sleep-timer mode.
@ VOLUME +, -
Note
The buttons not explained above (EDIT and KARAOKE) do
not operate for this unit.
Setting the clock
1
Press CLOCK/TIMER SET on the remote.
See below when to adjust the clock.
2
Press r or t to set the hour, then press
ENTER.
3
Press r or t to set the minute.
Each press changes the time in 1-minute steps.
4
Press ENTER.
The time display stops flashing and the clock starts from
00 seconds.
•MULTI JOG is also available in place of r or t.
To adjust the clock
1 Press CLOCK/TIMER SET on the remote.
2 Press r or t repeatedly to display “CLOCK” and
then press ENTER.
3 Carry out steps 2 to 4 described in “Setting the clock” to set
the time.
To display the time while the power is on
Press DISPLAY repeatedly. The clock display appears in the
display for 6 seconds.
If “- -:- -” appears when the unit is turned off
There has been a power interruption. Reset the clock.
7
CX-BK2
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
SET
3-2. PANEL
(Page 9)
3-3. TOP PANEL
(Page 9)
3-4. FRONT PANEL
ASSY
(Page 10)
3-5. MAIN BOARD
(Page 110)
3-7. TUNER (FM/AM)
(Page 11)
3-9. ACDC BOARD, POWER TRANSFORMER
(Page 12)
3-6. REAR COVER
3-8. SPEAKER BOARD
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.
(Page 11)
(Page 12)
3-7. TUNER (FM/AM)
(Page 11)
3-8. SPEAKER
BOARD
(Page 12)
3-10. AMP BOARD
(Page 13)
3-11. CD MECHANISM DECK
(CDM69BV-30CBD64NS)
(Page 13)
3-12. BASE UNIT SECTION
(Page 14)
3-13. BASE UNIT
(BU-30CBD64NS)
(Page 14)
3-14. BD BOARD
(Page 15)
3-15. SW (1) BOARD,
SW (2) BOARD,
SW (3) BOARD,
SW (4) BOARD,
BRACKET (TOP) ASSY
(Page 15)
3-18. MOTOR (ROLLER)
ASSY (ROLLER)
(M781)
(Page 17)
3-17. MOTOR (STOCKER)
ASSY (STOCKER)
(M761)
(Page 16)
3-20. RUBBER ROLLER
(SLIDER) ASSY
(Page 18)
3-21. TIMING BELT
(FRONT/REAR)
(Page 18)
3-16. CONNECTOR BOARD
(Page 16)
3-19. MOTOR (MODE)
ASSY (MODE)
(M771)
(Page 17)
3-22. CAM (GEAR)
(Page 19)
3-23. SENSOR BOARD
(Page 19)
8
Note: Follow the disassembly procedure in the numerical order given.
3-2. PANEL
3
four claws
4
2
four screws
(BVTP3
×
10)
1
three screws
(BVTP3
×
10)
9
6
three screws
(BVTP3
0
right panel
×
CX-BK2
10)
5
panel (left)
3-3. TOP PANEL
2
three claws
3
7
top panel
4
four screws
(BVTP3
×
1
8
four claws
10)
three screws
(BVTP3
×
10)
9
CX-BK2
)
3-4. FRONT PANEL ASSY
8
5
two screws
(BVTP3
1
wire (flat type) (19core)
(CN905)
front panel assy
×
10)
2
wire (flat type) (17core)
(CN004)
7
two claws
3-5. MAIN BOARD
2
qs
main board
wire (flat type)
(11core) (CN509)
5
qa
two screws
(BVTP3
0
×
6)
wire (flat type) (27core)
(CN901)
4
five screws
(BVTP3
×
10)
1
wire (flat type) (11core)
(CN502)
6
four screws
(BVTP3
6
wire (flat type) (11core)
(CN507)
7
connector
(CN007)
8
connector
(CN006)
×
3
connector (CN530)
10)
3
two screws
(BVTP3 × 10)
4
screw
(BVTP3 × 10
10
9
wire (flat type) (23core)
(CN902)
3-6. REAR COVER
)
r
3
connector
(CN303)
2
1
seven screws
(BVTP3
rear cove
4
CX-BK2
×
10
3-7. TUNER (FM/AM)
2
tuner (FM/AM)
1
two screws
(BVTP3
×
8)
11
CX-BK2
)
3-8. SPEAKER BOARD
3
speaker board
2
two screws
(BVTP3
×
10
1
connector
(CN503)
3-9. ACDC BOARD, POWER TRANSFORMER
1
connector (CN003)
2
connector (CN006)
5
seven screws
(BVTP3 × 10)
3
connector (CN011)
7
connector (CN015)
4
two screws
(BVTP3
×
10)
6
ACDC board
12
9
two screws
(ITC+4-8)
0
power transformer
8
connector
(CN010)
3-10. AMP BOARD
)
4
two screws
(BVTP3
×
10)
5
AMP board
3
two screws
(BVTP3
×
CX-BK2
10)
1
3-11. CD MECHANISM DECK (CDM69BV-30CBD64NS)
5
disk mecanical holder
4
four screws
(BVTP3 × 10)
2
CD support board
two screws
(BVTP3
×
10)
1
four screws
(BVTP3 × 10
6
CD mechanism deck (CDM69BV-30CBD64NS)
3
disk mechanical cover
2
four screws
(BVTP3 × 10)
13
CX-BK2
3-12. BASE UNIT SECTION
2
screw
(+PTPWH) (M2) (DIA. 7)
3
boss
1
floating
screw
(DIA. 12)
4
boss
7
base unit section
3-13. BASE UNIT (BU-30CBD64NS)
qa
base unit (BU-30CBD64NS)
1
tension spring (BU30-1)
5
floating screw
(+PTPWHM2.6
q;
vibration proof rubbers
×
6)
5
boss
6
6
boss
4
floating screw
(+PTPWHM2.6
9
vibration proof rubber
2
floating screw
(+PTPWHM2.6
7
vibration proof rubber
×
6)
3
floating screw
(+PTPWHM2.6
8
vibration proof rubber
×
6)
×
6)
14
3-14. BD BOARD
r
)
2
wire (flat type) (11 core)
4
wire (flat type) (16 core)
CX-BK2
3
Remove the solde
(four portions).
5
BD board
1
wire (flat type) (23 core)
3-15. SW (1) BOARD, SW (2) BOARD, SW (3) BOARD, SW (4) BOARD, BRACKET (TOP) ASSY
4
SW (3) board
5
SW (4) board
6
six screws
(BVTP2.6
×
8
1
four
(BTP2.6
2
SW (1) board
7
3
SW (2) board
screws
×
6)
bracket (top) assy
15
CX-BK2
)
s
3-16. CONNECTOR BOARD
CONNECTOR board
– bottom view –
1
Remove five solders.
5
3-17. MOTOR (STOCKER) ASSY (STOCKER) (M761)
3
two screws
(BVTP2.6
5
stocker motor board
×
8)
connector
(CN703)
4
connector
(CN710)
4
3
6
CONNECTOR board
2
Remove two solder
2
four screws
(BVTP2.6
×
8
16
6
motor (stocker) assy (stocker) (M761)
1
belt (stocker)
d
3-18. MOTOR (ROLLER) ASSY (ROLLER) (M781)
3
two screws
5
motor (roller) assy
(roller)(M781)
2
Remove two solders.
4
ROLLER MOTOR
CX-BK2
boar
3-19. MOTOR (MODE) ASSY (MODE) (M771)
1
Remove five solders
of rotary encoder.
MODE MOTOR
board
2
Remove two solders
of motor (M771)
3
two screws
(BVTP2.6
1
belt (roller V)
×
8)
4
MODE MOTOR board
6
motor (mode) assy (mode) (M771)
5
belt (mode V)
17
CX-BK2
)
3-20. RUBBER ROLLER (SLIDER) ASSY
8
qd
rubber roller
(slider 1) assy
qs
step screw
qa
rubber roller
(slider 2) assy
0
rubber roller
(slider 4) assy
step screw
qf
screw
(BVTP2.6
9
×
tension
spring
(slider 2)
8)
5
step screw
6
tension spring
(base slider 4)
7
rubber roller
(slider 1) assy
1
step screw
2
rubber roller
(slider S) assy
3
tension spring
(base slider 5
4
rubber roller
(slider 5) assy
qg
sub chassis
3-21. TIMING BELT (FRONT/REAR)
3
slider (mode cam) assy
5
two gears
(center)
6
timing belt
(front)
7
two gears (center)
8
timing belt (rear)
9
timing belt (rear)
When install three timing belts,
its pass under each claws.
timing belt
(rear)
claw
timing belt
(rear)
claw
18
4
gear
(timing)
2
gear (mode cam)
: Note
1
screw
(PTPWH2.6
×
claw
timing belt (front)
Note: Refer to assembly (Section 4)
8)
claw
3-22. CAM (GEAR)
)
ql
harness
qd
gear (eject lock)
q;
cam (eject lock)
: Note
qh
two claws
qj
rotary encoder
(S771)
qf
gear
(mode B)
w;
screw
(BVTP2.6
×
8)
qg
screw
(PTPWH2.6
×
8)
wa
SENSOR board
8
shaft
(shutter)
7
compression spring
(shutter)
qs
cam (BU U/D)
qa
screw
(PTPWH2.6
×
8)
3
screw
(BVTP2.6
×
8)
1
screw
(PTPWH2.6
×
8)
4
two screws
(BVTP2.6
×
8)
2
lever shutter (A)
5
base (shutter) block
6
gear (mode A)
9
screw
(PTPWH2.6
×
8)
qk
claw
Note: Refer to assembly (Section 4).
qf
cam (gear)
: Note
qd
screw
qs
gear(mode cam)
qa
screw
(PTPWH2.6
0
gear (mode C)
:Note
CX-BK2
6
gear (mode 5)
5
screw (PTPWH2.6 × 8
4
gear (mode 5)
3
screw (PTPWH2.6 × 8)
×
8)
2
pulley
(mode deceleration)
1
screw(PTPWH2.6 × 8)
Note: Refer to assembly
(Section 4).
3-23. SENSOR BOARD
9
screw
(PTPWH2.6
×
8)
8
gear (mode D)
7
screw (PTPWH2.6 × 8)
19
CX-BK2
SECTION 4
ASSEMBLY
• This set can be assembled in the order shown below.
4-1. HOW TO INSTALL THE CAM (EJECT LOCK)
1
Rotate the cam (BU U/D) fully in the direction of arrow.
2
Engage the gear (eject lock) and the gear of the cam (eject lock)
aligning the mark with the center of the gear (eject lock).
cam (BU U/D)
mark
gear (eject lock)
4-2. HOW TO INSTALL THE CAM (GEAR)
1
Check that the cam (BU U/D) can not be rotated in the direction of arrow.
2
Align the mark on the cam (gear) with the boss as shown in the figure
and install the cam (gear).
cam (gear)
cam (BU U/D)
cam (eject lock)
– bottom view • front –
boss
mark
20
– bottom view • front –
4-3. HOW TO INSTALL THE GEAR (MODE C)
1
Align the mark on the rotary encoder (S771) with the projection of the assy.
2
Check that the cam (BU U/D) can not be rotated in the direction of arrow.
3
Install the gear (
rotary encoder
(S771)
mode
C)
gear (
mode
C)
CX-BK2
cam (BU U/D)
mark projection
4-4. HOW T O INST ALL THE GEAR (MODE CAM)
1
Slide the shaft in the direction of arrow.
2
Align mark A on the gear (mode cam) with mark B on the slider (mode cam) assy,
then install the gear (mode cam).
3
Check that mark C on the gear (mode cam) is in alignment with mark D on the cam (gear).
mark
A
gear (mode cam)
chassis
– bottom view • front –
shaft
slider (mode cam) assy
cam (gear)
mark
D
– bottom view • front –
mark
mark
B
C
21
CX-BK2
4-5. HOW TO INSTALL THE ROTARY ENCODER (S702), GEAR (STOCKER COMMUNICATION)
4
Engage the rotary encoder (S702)
and the gear (stocker communication)
as shown below in the figure.
rotary encoder
(S702)
gear
(stocker communication)
3
screw
×
(PWH2
1
6)
rotary encoder
(S702)
5
screw
(PTPWH2.6
×
8)
7
two screws
(PTPWH2.6
6
two gears
(stocker communication)
×
8)
gear
(stocker
communication)
– rear –
4-6. HOW TO INSTALL THE STOCKER ASSY
3
screw
cam
2
cam
(stocker V)
(PTPWH2.6
×
8)
boss
2
five
solders
CONNECTOR board
5
two screws
(PTPWH2.6
4
two cams
(stocker U/D)
Install the stocker assy
fitting three bosses into the
each groove of cam
then fix by rotating the cams
in the direction of arrow.
boss
×
8)
To install three cams, align each groove
of the cam with each
chassis as shown in the figure.
f
mark on the
22
screw
– rear –
rotary encoder
(S702)
hole
1
Position the hole on the gear
(stocker communication) on the
screw of the rotary encoder (S702).
gear
(stocker communication)
SECTION 5
TEST MODE
CX-BK2
[Cold Reset]
* The cold reset clears all data including preset data stored in
the RAM to initial conditions. Execute this mode when returning the set to the customer.
Procedure:
1. Press the POWER 1 button to turn off the main power.
2. While depressing the x button, press the POWER 1 button.
3. The fluorescent indicator tube does not display any message
and the set is reset.
[Version Display Mode]
*The version of the microcomputer is displayed.
Procedure:
1. Press the POWER 1 button to turn the set on.
2. To enter the test mode, press two buttons x and POWER 1
simultaneously for more than five seconds. The version of the
microcomputer is displayed.
[FL T ube Check]
* All fluorecent segments are tested.
Procedure:
1. Insert a disc, and extract an AC plug.
2. While depressing the [FUNCTION] button, insert an AC plug
to enter the test mode.
3. The message “CD TEST” is displayed, the initialization is
performed.
Then all segments of the fluorecent indicator tube are turned on.
[CD Ship Mode]
*This mode moves the optical pick-up to the position durable
to vibration. Use this mode when returning the set to the customer after repair.
Procedure:
1. Press the
2. Set the FUNCTION to CD.
3. Press the x button for more than five seconds.
4. After a message “MECHA LOCK” is displayed on the fluo-
rescent indicator tube, the CD ship mode is set and the power
is turned off.
POWER 1 button to turn the set on.
sage “EQ MAX”, “EQ MIN” or “EQ FLAT” is displayed in
this order.
[AM Channel Step 9 kHz/10kHz Selection Mode]
* Either the 9 kHz step or 10 kHz step can be selected for the
AM channel step.
Procedure:
1. Set the FUNCTION to AM.
2. While depressing the
ton.
3. The channel step is changed over.
[CD Test Mode]
*This mode can run the CD sled motor freely. Use this mode,
for instance, when cleaning the pickup.
Procedure:
1. Extract an AC plug.
2. While depressing the [FUNCTION] button, insert an AC plug
to enter the CD test mode. The message “CD TEST” is displayed.
3. With the CD in stop status, press the > button to move the
pickup to outside track, or press the . button to inside track.
4. When press the B button, normal playback is performed.
5. Each time the B button is pressed during normal playback,
the tracking servo is switched on or off.
[CD Repeat 5 Times Limit Release Mode]
Procedure:
1. Press the POWER 1 button to turn the set on.
2. Select the FUNCTION to CD.
3. Press three buttons of x and [FUNCTION] and B simultaneously.
4. The repeat all mark blinks and then repeat 5 times limit is
released.
[BAND] button, press the POWER 1 but-
[Disc Tra y Lock]
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Setting Procedure :
1. Press the POWER 1 button to turn the set on.
2. Press two buttons of x and Z simultaneously for five seconds.
3. The message “LOCKED” is displayed and the tray is locked.
Releasing Procedure :
1. Press two buttons of x and Z simultaneously for five seconds again.
2. The message “UNLOCKED” is displayed and the tray is unlocked.
Note : When “LOCKED” is displayed, the tray lock is not released
by turning power on/off with the POWER 1 button.
[AMP Test]
*This mode is used to check the function of the amplifier.
Procedure:
1. Extract an AC plug.
2. While depressing the [GEQ] button, insert an AC plug to enter the AMP test mode. T he message “ AMP TEST” is displayed.
3. The message “Volume MAX” is displayed, when the [VOL-
UME] knob is rotated clockwise. The message “Volume 0” is
displayed, when the [VOLUME] knob is rotated counterclockwise.
4. Each time the [BASE] or [TREBLE] knob is turned, the mes-
23
CX-BK2
SECTION 6
ELECTRICAL ADJUSTMENTS
CD SECTION
Note:
1. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
2. Use an oscilloscope with more than 10MΩ impedance.
3. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
S-curve Check
Connection:
oscilloscope
BD board
TP (FE)
TP (VC)
Procedure:
1. Connect an oscilloscope to test point TP (FE) and TP (VC)
on the BD board.
2. While depressing the button, insert an AC plug.
B
3. Put the disc (YEDS-18) in and press the button and
actuate the focus search. (actuate the focus search when disc
table is moving in and out)
4. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak lev el within 2 ± 1
Vp-p.
S-curve waveform
+
–
symmetry
A
B
x
within 2
±
1 Vp-p
RFDC signal waveform
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level: 0.6
±
0.15 Vp-p
Checking Location: CD board (Conductor side)
RFAC Level Check
Connection:
oscilloscope
BD board
TP (RFAC)
TP (VC)
+
–
Procedure:
1. Connect an oscilloscope to test point TP (RFA C) and TP (VC)
on the BD board.
2. Turn the power on.
3. Put the disc (YEDS-18) in to playback the number five track.
4. Confirm that oscilloscope waveform is clear and check RF AC
signal level is correct or not.
Note: A clear RFAC signal waveform means that the shape “◊” can be
clearly distinguished at the center of the waveform.
RFAC signal waveform
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
Note: •Try to measure several times to make sure than the ratio of A : B
or B : A is more than 10 : 7.
•Take sweep time as long as possible and light up the
brightness to obtain best waveform.
Checking Location: BD board (Side B)
RFDC Level Check
Connection:
oscilloscope
BD board
TP (RFDC)
TP (VC)
+
–
Procedure:
1. Connect an oscilloscope to test point TP (RFDC) and TP (VC)
on the BD board.
2. Turn the power on.
3. Put the disc (YEDS-18) in to playback the number five track.
4. Confirm that oscilloscope waveform is clear and check RFDC
signal level is correct or not.
Note: A clear RFDC signal waveform means that the shape “◊” can be
clearly distinguished at the center of the waveform.
Checking Location: BD board (Side B)
level: 1.0
±
0.4 Vp-p
24
CX-BK2
E-F Balance Adjustment
Connection:
oscilloscope
BD board
TP (TE)
TP (VC)
+
–
Procedure:
1. Connect an oscilloscpe to test point TP (TE) and TP (VC) on
the BD board.
B
2. AC is put in pushing
button to enter the CD test mode.
3. Put the disc (YEDS-18) in to playback the number five track.
B
4. Press the button. If it plays, press the button again.
B
(The tracking servo and the sledding servo are turned OFF)
5. Rotate RV101 on the BD board to adjust A (DC voltage) of
the center of the oscilloscope waveform becomes 0 V.
Traverse Wavef orm
0V
Center of
the waveform
B
A (DC
voltage)
Checking Location:
– BD BOARD (Side B) –
RV101
E-F Balance
Adjustment
TP7
(VC)
IC103
TP2
(TE)
TP8
(RFAC)
IC101
TP6
(RFDC)
TP4
(FE)
level: 1.0 ± 0.5 Vp-p
6. Press the button. (The tracking servo and sledding servo
B
are turned ON)
Confirm A (DC voltage) at that tome is 0 V.
7. To exit from this mode, turn the power off.
Notes: •Always move the optical pick-up to most inside track when
0V
exiting from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can
be chipped.
Traverse Wavef orm
Tracking servo
Sled servo
OFF
Tracking servo
Sled servo
ON
A (DC
voltage)
Checking Location: BD board (Side B)
Adjustment after CD Base Unit (BU-30CBD64NS) is Replaced
Perform the “E-F Balance (1 track jump) check”.
25
CX-BK2
MEMO
26
7-1. BLOCK DIAGRAM – CD Section –
OPTICAL PICK-UP
BLOCK
VC
2
VCC
4
PD1
7
PD2
5
I5-10
3
I1-6
1
LD
GND
PD
VR
F+
FOCUS
COIL
F-
COIL
T+
T-
TRACKING
VDD (3.3V)
POWER CONTROL
E-F BALANCE
(1 TRACK JUMP)
(SPINDLE)
AUTOMATIC
Q101
RV101
M102
(SLED)
M101
M
M
RF AMP
IC103
VC
27
A
6
RFDCI
B
7
C
8
D
9
E
10
F
11
LD
1
19
PD
2
MOTOR/COIL DRIVE
IC102
VO1+
52
VO1-
47
VO2+
56
VO2-
55
VO3+
2
VO3-
1
VO4+
10
VO4-
5
RF AC
RFDC
FE
FEI
TE
SWTE_BAL
IN1+
IN1-
IN2+
IN2-
IN3+
IN3-
IN4R
STBY
SECTION 7
DIAGRAMS
15
28
29
16
17
18
12
35
34
32
31
27
26
24
8
DIGITAL SERVO,
DIGITAL SIGNAL PROCESSOR
IC101
RFAC
50
RFDC
43
PCMD
FE
39
TE
41
SE
40
FFDR
33
FRDR
34
TFDR
31
TRDR
32
SFDR
29
SRDR
30
MDP
25
BCLK
LRCK
XTAI
XTAO
DATA
CLOK
XLAT
SQCK
SCLK
SCOR
SQSO
SENS
66
67
65
71
72
4
6
5
77
8
15
76
7
X201
16.9344MHz
D/A CONVERTER,
MP3 DECODER
SDIO
12
BCKIA
13
LRCKIA
14
XI
62
XO
63
IC104
MIDIO
STAND BY
RESET
MICK
MICS
REQ
MILP
CX-BK2
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: CD
IC721
IC711
IC701
OUT1
OUT2
OUT1
OUT2
OUT1
OUT2
S771
CD-L
(Page 28)
A
4
2
4
2
4
2
G
M
M
M
M761
(STOCKER)
M781
(ROLLER)
M771
(MODE)
LO
23
RO
26
R-CH
SYSTEM CONTROLLER
IC901 (1/3)
IO-MIDIO
5
19
6
7MIACK
1
3
39
4
64
38
62
37
19
5
65
66
52
55
60
57
21
56
58
O-MP3STB
O-MICK
I-MIACK
O-MP3RST
O-MICS
I-MP3REQ
O-MILP
O-DATA
O-CLOCK
O-XLT
O-SQCK
I-SCOR
I-SQSO
I-SENS
O-ELV_POS
O-ELV_NEG
O-LOD_NEG
O-LOD_POS
O-SLD_POS
O-SLD_NEG
I-SLD_E0
I-SLD_E1
I-SLD_E2
I-SLD_E3
75
87
85
77
76
86
88
73
89
70
STOCKER MOTOR DRIVE
FIN
7
9
RIN
ROLLER MOTOR DRIVE
FIN
7
9
RIN
MODE MOTOR DRIVE
FIN
7
9
RIN
ROTARY ENCODER (MODE)
1
2
3
4
XRST
S702
ROTARY ENCODER
2
90
I-ELV_E0
69
I-ELV_E1
67
I-ELV_E2
I-ELV_E3
68
O-XRST
61
49
51
47
59
O-PWM3
O-PWM2
O-PWM1
O-LDON
I-SW1-A
I-SW2-A
I-SW2-B
I-SW3
I-SW4
I-SW5-A
I-SW5-B
I-D_SENSOR
S711 (DISC INSERT(8/12cm))
82
S713 (DISC IN (8/12cm))
79
S714 (DISC IN (8cm))
83
80
78
S717 (DISC POSITION)
84
S716 (STOCKER IN/OUT)
74
81
(STOCKER POSITION)
1
2
3
4
S715 (DISC OUT)
S718 (STOCKING)
LEVEL SHIFT
Q731
G
(ON : When disc insert)S711
S713
(ON : Play position)
S714
(ON : When disc out from play position)
S715
S718
S717
S716
DISC INSERT
DETECT SENSOR
IC751
ON : Play position
(8cm disc only)
OFF: In the Midst disc is moving
between play position and
stocker
In the midst disc is moving
between play position and stocker
ON : disc is play position side
OFF : disc is stocker side
ON : The moment disc in/out
from stocker
2727
CX-BK2
7-2. BLOCK DIAGRAM – TUNER/USB Section –
(Page 27)
FM 75 Ω
(COAXIAL)
AM LOOP
CD-L
A
FM/AM TUNER PACK
TUNER-L
FM ANT
TUNER-R
AM ANT
DO
DI
CLK
CE
TUNED
STEREO
R-CH
DO
MDATA
MCLK
PLLCE
TUNED
STEREO
40
39
37
35
CD-L
TUNER-L
AUX-L
RECB-2
INPUT SELECT
IC601 (1/2)
TOUTL
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: CD
: TUNER
: REC
: USB
: AUX IN
: LINE IN (AUDIO)
: VIDEO
29
OUT-L
V-BASS,
18 – 24
MDATA, MCLK,
LEVEL
B
C
D
(Page 29)
(Page 29)
(Page 29)
D –
VBAS
MCLK
MDATA
DO
MDATA
MCLK
PLLCE
TUNED
STEREO
USB VBUS
USB DATA
USB CLK
USB ACK
USB INT
CLK
LCK
R-CH
JK602 (2/2)
L
AUX OUT
R
SHIFT REGISTER
A
B
IC703
DATA
SO
18 3
3
DATA
14 Q8
9Q3
16 Q10
SHIFT REGISTER
IC701
Q10
CLOCK
4 5
4 5
CLOCK
V-BASS
9Q3
18
10Q4
19
11Q5
20
12Q6
21
13Q7
22
14Q8
23
15Q9
24
16
LCK
LCK
17Q11
18
SO
6Q0
15Q9
10Q4
INH
SHIFT SO
USB ON
CD ON
TUNER ON
LINE AMP
Q605
MUTING
Q607
R-CH
Q608
J701
LINE IN
VIDEO
L
AUDIO
R
J700
(USB)
3
D+
2
1
USB ON/OFF
SWITCH
Q702
USB VBUS ON
USB INTERFACE
IC700
26 D+ 36 FINL 15 X2
25 D –
23 VBUS
FOUTR
1 2
XTI
X700
12MHz
R-CH
AUX IN
34FOUTL
37
XTO
JK603
VIDEO OUT
JK602 (1/2)
L
R
39 FINR
SDA21SCL13ACK12INT_DATA
20
USB ACK
USB CLK
USB DATA
USB INT
5OUTL
6OUTR
R-CH
R-CH
14 X1
12 X0
AUX AUDIO
SELECTOR
IC501
COM X
BA
10 9
B
A
13
SYSTEM CONTROLLER
IC901 (2/3)
6I-DO
50 O-MDATA
48 O-MCLK
46 O-PLLCE
9I-TUNE
8I-STEREO
33 I-USB_VBUS_ON
24 I2C-USB_DATA
25 I2-USB_CLK
31 I-USB_ACK
32 I-USB_INT
44 O-SHIFT_DATA
43 O-SHIFT_CLK
45 O-SHIFT_STB
LEVEL
BAND-PASS
99I-LEVEL
FILTER
Q902
INH, SHIFT SO,
CLK, LCK
USB ON,
CD ON, TUNER ON
E
F
(Page 29)
(Page 30)
2828
CX-BK2
7-3. BLOCK DIAGRAM – AMP Section –
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TUNER
BASS BOOST ENHANCER
IC603
(Page 28)
(Page 28)
(Page 28)
OUT-L
B
V-BASS,
18 –24
C
MDATA, MCLK,
LEVEL
D
BBE ON/OFF
CONTROL
Q623
V-BASS
1
INA
BBE14VREF12GOUT
7
FREQUENCY
CONTROL
Q614 – 616
19
18
6
OUTA 25OUT 2
GIN
13
BOOST
CONTROL
Q617 – 620
23
20
222124
R-CH
+
FEED BACK
SWITCH
Q625
BOOST
CONTROL
Q624
ELECTRICAL VOLUME
IC601 (2/2)
28 VOLIN2
DATA22CLOCK
21
MCLK
MDATA
SAOUT
19
LEVEL
M301
FAN MOTOR
Q301 – 303
R-CH
RELAY DRIVE
Q530
(FAN)
MM
DRIVE
+
THERMAL DETECT
POWER
POWER MONITOR
JK502
5 SPEAKER
+
–
+
–
J521
PHONES
L
R
G
H
(Page 30)
(Page 30)
SWITCHING
Q618
R-CH
SWITCHING
Q619
R-CH
CURRENT
MIRROR
Q521, 523
PRE DRIVE
Q517
27BB_A2
26BB_B2
R-CH
D611
MUTING
Q525
MUTING
CONTROL
Q527
R-CH
+
OVER CURRENT
DETECT
Q013
X901
32.768kHz
R-CH
CASCADE
Q511, 513, 515
X902
5MHz
BIAS
Q507, 509
–VP
+VP
FINAL DRIVE
Q531, 533
R-CH
OVER LOAD
DETECT
Q505
+
HOLD
Q012
+
+VH
+VL
– VH
– VL
OUTPUT LEVEL
DETECT
Q620, 621
OUTPUT LEVEL
DETECT
Q617, 622 – 624
+
TH501, 502
THERMAL
DETECT
Q610, 611
R-CH
+
R-CH
RY501
(Page 28)
INH, SHIFT SO,
CLK, LCK
E
LIQUID CRYSTAL
DISPLAY
LCD001
67 – 70 1 – 65
LCD DRIVER
COM1 – COM4 S1 – S65
IC001
OSC
INH
39
O-MUTE
DI
80
CL
79
CE
78
77
76
OSC
C105, R101
INH
SHIFT SO
CLK
LCK
CLK
LCK
3
4
5
18
2
3
4
53
54
63
LED DRIVE
IC602
DATA
CLK
LCK
SO
LED DRIVE
IC601
DATA
CLK
LCK
O-LCD_DATA
O-LCD_CLK
O-LCD_CE
Q0 – Q9
Q10
Q1 – Q6
Q8, Q9
Q7
16
12
6 – 15
6 – 11
13, 14
LED DRIVE
Q601 – 605
LED203
i-Bass
LED204 – 221
(ILLUMINATION)
LED251 – 254
(LCD BACKLIGHT)
LED601
(DISC SLOT ILLUMINATION)
17 18
XT1
LED631 – 635
(DISC INDICATOR 1 – 5)
XT2
14 15
X1
STBY
34
LED202
STANDBY/ON
X2
SYSTEM CONTROLLER
IC901 (3/3)
S311 – 320, 331 – 339,
S341 – 344
VOLUME
BASS
TREBLE/MIDDLE
MULTI JOG
REMOTE CONTROL
98
I-POWER_MONI
ROTARY
ENCODER
ROTARY
ENCODER
ROTARY
ENCODER
ROTARY
ENCODER
RECEIVER
IC603
S301
S302
S303
S304
I-KEY1 – I-KEY3
97 – 95
93
I-RE_VOL
92
I-RE_BAS
91
I-RE_TRE
94
I-RE_JOG
23
I-RMC
I-HEADPHONE
O-POWER
42
40
41I-POWER_DOWN
16RESET
POWER_DOWN
RESET
J
(Page 30)
2929
CX-BK2
7-4. BLOCK DIAGRAM – POWER SUPPLY Section –
POWER,
(Page 29)
POWER MONITOR
H
POWER MONITOR
VOLTAGE
DETECT
Q107 – 109
AC DETECT
Q105, 106
++
+VH – VH
DC UNBALANCE
DETECT
D139, 140
(Page 28)
USB ON,
TUNER ON, CD ON
F
USB ON
TUNER ON
SERVO
+2.5V
+2.5V
REGULATOR
IC121
VDD (3.3V)
USB 5V
POWER
FR VDD (3.3V)
B+ SWITCH
Q024, 025
VCC 9V
+5V
REGULATOR
IC701
+9V
REGULATOR
Q050, 051
B+ SWITCH
Q700, 701
VM 10V
TU 9V
REGULATOR
CONTROL
Q891, 892
+3.3V
REGULATOR
Q018, 019
+10V
REGULATOR
IC101
+9V
REGULATOR
Q890
M+12V,
VM, +12V
CD VM (7V),
+7V
D002
+12V
REGULATOR
IC003
+7V
REGULATOR
IC001
DC UNBALANCE
DETECT
D112, 113
+VL – VL
OVER CURRENT
DETECT
Q102 – 104
FAN B+
+VH
– VH
+VL
– VL
RECT
+
D116, 117
RECT
D120, 121
RECT
D114, 115
RECT
D004
RECT
D002
REG
RECT
D007 – 010
POWER TRANSFORMER
(MAIN)
PT001
VH
VH
VL
VL
REG
REG
THERMAL DETECT
RY001
G
(Page 29)
(AC IN)
(Page 29)
POWER_DOWN,
RESET
J
CD ON
POWER_DOWN
RESET
EVER 3.3V
RESET SIGNAL
GENERATOR
IC902
B+ SWITCH
Q901, 906
VDD
VOLTAGE
DETECT
IC904
D902
D906
+4V
REGULATOR
IC905
VSTBY
+12V
D612
RECT
D005, 006
RELAY DRIVE
POWER TRANSFORMER
(SUB)
PT006
Q101
3030
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