Sony CX-BK1 User manual

SERVICE MANUAL
COMPACT DISC RECEIVER
US model
COMPACT DISC DECK RECEIVER
AEP, UK, Chilean, Peruvian and Mexican models
US Model
AEP Model
UK Model
E Model
CX-BK1
Ver 1.1 2004.02
9-877-426-02 Sony Corporation
2004B05-1 Home Audio Company
C2004.02 Published by Sony Engineering Corporation
SPECIFICATIONS
•CX-BK1istheamplifier,CDplayer,tapedeck
and tuner section in BMZ-K1.
•Tape deck is not loaded in US model.
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
US model: 110 W + 110 W (40 Hz - 20 kHz,
THD less than 1%, 6 Ω)
140 W + 140 W (40 Hz - 20 kHz,
THD 10%, 6 Ω)
Chilean, Peruvian and Mexican models:
140 W + 140 W (1 kHz, THD
less than 1%, 6 Ω)
180 W + 180 W (1 kHz, THD
10%, 6 Ω)
Total harmonic distortion 0.08 % (90 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
MIC: 2.5mV (Chilean, Peruvian
and Mexican models)
Outputs SPEAKERS: 6 Ωor more
PHONES: 32 Ωor more
AUX (MD) OUT: 500 mV
VIDEO OUT: 1.0 Vp-p (75 Ω)
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
CASSETTE DECK (Except US model)
Track format 4 tracks, 2 channels stereo
Frequency response 100 Hz –10000 Hz (±3dB)
Recording system AC bias
Heads Recording/playback ×1, erase ×1
GENERAL
Power requirements
US model: 120 V, 60 Hz
Mexican model: 127 V, 60 Hz
Chilean and Peruvian models:
120 V/220 –230 V/240 V AC
(switchable), 50/60 Hz
Licensed by BBE Sound, Inc. under USP4638258, 5510752
and 5736897. Model Name Using Similar Mechanism NEW
CD Section CD Mechanism Type CDM69BV-30CBD64NS
Base Unit Name BU-30CBD64NS
Optical Pick-up Name A-MAX.3
TAPE Section Model Name Using Similar Mechanism NEW
(Except US model) Tape Transport Mechanism Type CMAL1Z240A
Power consumption
US model: 120 W
Chilean and Peruvian models:
155 W
Mexican model: 160 W
Power consumption in standby mode
US model: with ECO mode on: 0.25 W
with ECO mode off: 20 W
Chilean and Mexican models:
with ECO mode on: 0.25 W
with ECO mode off: 28 W
Dimensions (w/h/d) Approx. 211 ×379 ×419 mm
(8 3/8×15 ×16 5/8in.)
Mass
US model: Approx. 8.6 kg (19 lbs)
Chilean and Peruvian models:
Approx. 9.9 kg
Specifications and external appearance are subject to change
without notice.

CX-BK1
2
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
•Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
The following caution label is located inside the unit.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing 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. Follow 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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2VAC range are suit-
able. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µ FAC
voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•Unleaded solder melts at a temperature about 40 ˚C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
•Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges oc-
cur such as on IC pins, etc.
•Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
CLASS 1 LASER PRODUCT
LUOKAN 1 LASER LAITE
KLASS 1 LASER APPARAT
This appliance is classified
as a CLASS 1 LASER
product.
This label is located on the
rear exterior.

CX-BK1
3
TABLE OF CONTENTS
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 Block .............................................................. 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 Transformer.................................. 12
3-10. AMP Board ..................................................................... 13
3-11. CD Mechanism Deck (CDM69BV-30CBD64NS)......... 13
3-12. Signal Cassette Mechanism ............................................ 14
3-13. Base Unit Section............................................................ 14
3-14. Base Unit (BU-30CBD64NS)......................................... 15
3-15. BD Board......................................................................... 15
3-16. SW (1) Board, SW (2) Board, SW (3) Board,
SW (4) Board, Bracket (Top) Assy................................. 16
3-17. CONNECTOR Board ..................................................... 16
3-18. Motor (Stocker) Assy (Stocker) (M761) ........................ 17
3-19. Motor (Roller) Assy (Roller) (M781)............................. 17
3-20. Motor (Mode) Assy (Mode) (M771) .............................. 18
3-21. Rubber Roller (Slider) Assy ........................................... 18
3-22. Timing Belt (Front/Rear) ................................................ 19
3-23. Cam (Gear) ...................................................................... 19
3-24. SENSOR Board............................................................... 20
4. ASSEMBLY
4-1. How to Install the Cam (Eject Lock).............................. 21
4-2. How to Install the Cam (Gear)........................................ 21
4-3. How to Install the Gear (Mode C) .................................. 22
4-4. How to Install the Gear (Mode Cam) ............................. 22
4-5. How to Install the Rotary Encoder (S702),
Gear (Stocker Communication) ...................................... 23
4-6. How to Install the Stocker Assy...................................... 23
5. TEST MODE.............................................................. 24
6. MECHANICAL ADJUSTMENTS....................... 25
7. ELECTRICAL ADJUSTMENTS
Deck Section ................................................................... 25
CD Section ...................................................................... 28
8. DIAGRAMS
8-1. Block Diagram – CD Section – ..................................... 31
8-2. Block Diagram – TUNER/TAPE/USB Section – ......... 32
8-3. Block Diagram – AMP Section – .................................. 33
8-4. Block Diagram – POWER SUPPLY Section – ............. 34
8-5. Note for Printed Wiring Boards
and Schematic Diagrams ................................................ 35
8-6. Printed Wiring Board – BD Board – ............................. 36
8-7. Schematic Diagram – BD Board – ................................ 37
8-8. Printed Wiring Boards – CHANGER Section –............ 38
8-9. Schematic Diagram – CHANGER Section – ................ 39
8-10. Printed Wiring Board
– DECK Board (Except US model) –............................ 40
8-11. Schematic Diagram
– DECK Board (Except US model) –............................. 41
8-12. Printed Wiring Board – MAIN Board – ........................ 43
8-13. Schematic Diagram – MAIN Board (1/4) – .................. 44
8-14. Schematic Diagram – MAIN Board (2/4) – .................. 45
8-15. Schematic Diagram – MAIN Board (3/4) – .................. 46
8-16. Schematic Diagram – MAIN Board (4/4) – .................. 47
8-17. Printed Wiring Board – USB AUX Board –.................. 48
8-18. Schematic Diagram – USB AUX Board –..................... 49
8-19. Printed Wiring Boars – MIC Board
(Chilean, Peruvian and Mexican models) – ................... 50
8-20. Schematic Diagram – MIC Board
(Chilean, Peruvian and Mexican models) – ................... 51
8-21. Schematic Diagram – AMP Board (1/2) – .................... 52
8-22. Schematic Diagram – AMP Board (2/2) – .................... 53
8-23. Printed Wiring Board – AMP Board – .......................... 54
8-24. Printed Wiring Board – HEADPHONE Board – .......... 55
8-25. Schematic Diagram – HEADPHONE Board – ............. 55
8-26. Printed Wiring Board – SPEAKER Board – ................. 56
8-27. Schematic Diagram – SPEAKER Board –.................... 57
8-28. Printed Wiring Boards – KEY Section –....................... 58
8-29. Schematic Diagram – KEY Section – ........................... 59
8-30. Printed Wiring Boards – LCD Section – ....................... 60
8-31. Schematic Diagram – LCD Section – ........................... 61
8-32. Printed Wiring Board – ACDC Board – ........................ 62
8-33. Schematic Diagram – ACDC Board – ........................... 63
8-34. Printed Wiring Board
– PT Board (US, AEP and UK models) – ...................... 64
8-35. Schematic Diagram
– PT Board (US, AEP and UK models) – ...................... 65
8-36. Printed Wiring Board – PT Board
(Chilean, Peruvian and Mexican models) – ................... 66
8-37. Schematic Diagram – PT Board
(Chilean, Peruvian and Mexican models) – ................... 67
8-38. IC Pin Function Description ........................................... 73
9. EXPLODED VIEWS
9-1. Panel Section ................................................................... 79
9-2. Top Panel Block .............................................................. 80
9-3. Front Panel Block-1 ........................................................ 81
9-4. Front Panel Block-2 ........................................................ 82
9-5. Front Panel Block-3 ........................................................ 83
9-6. Chassis Block-1............................................................... 84
9-7. Chassis Block-2............................................................... 85
9-8. CD Mechanism Deck Section-1
(CDM69BV-30CBD64NS) ............................................. 86
9-9. CD Mechanism Deck Section-2
(CDM69BV-30CBD64NS) ............................................. 87
9-10. CD Mechanism Deck Section-3
(CDM69BV-30CBD64NS) ............................................. 88
9-11. CD Mechanism Deck Section-4
(CDM69BV-30CBD64NS) ............................................. 89
9-12. CD Mechanism Deck Section-5
(CDM69BV-30CBD64NS) ............................................. 90
9-13. CD Mechanism Deck Section-6
(CDM69BV-30CBD64NS) ............................................. 91
9-14. Optical Pick-up Section (BU-30CBD64NS) .................. 92
10. ELECTRICAL PARTS LIST ............................... 93

4
CX-BK1 SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.
•MODEL IDENTIFICATION
– Rear Cover –
MODEL PART No.
US model 4-245-039-0[]
Chilean and Peruvian models 4-245-039-1[]
AEP and UK models 4-245-039-2[]
Mexican model 4-245-039-3[]
PART No.
SERVICE POSITION
–Tape mechanism deck (except US) –
Connect the wire (flat type) (8 core)
to the main board (CN903) and
the mechanism deck.
Connect the wire (flat type) (11 core)
to the deck board (CN008) and the main board (CN009).

5
CX-BK1
– 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.
– main board, ACDC board –
•For connecting the CD mechanism deck, prepare three extension jigs. (Refer to “– CD mechanism deck –”)
Connect the extension jig (J-2501-248-A)
to the connector board (CN701) and
the main board (CN901).
Connect the extension jig (J-2501-242-A)
to the BD board (CN104) and the main board (CN507).
Connect the extension jig (J-2501-245-A)
to the BD board (CN102) and
the main board (CN902).
AMP board
speaker board
PT board
ACDC board
CD mechanism deck
tuner unit
main board
front panel section

6
CX-BK1
Main unit: front
1POWER 6STANDBY/ON
Switches the unit on and off (standby).
2FUNCTION
Switches the active function among CD, USB, TAPE
(Except US model), TUNER, VIDEO and AUX.
3BAND
Select tuner function and the tuner band.
4GEQ
Selects a sound equalization curve.
i-Bass
Produces rich and clear low frequency sound.
5TREBLE/MIDDLE
Adjusts the treble or middle range level.
BASS
Adjusts the bass level.
6PLAY MODE (US model)
Selects various CD play mode.
7TUNING DOWNf/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.
#
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.
$aPAUSE/SET
Pauses CD play.
sSTOP/CLEAR
Stops CD play.
cPRESET (US model)
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
(Ø3.5 mm). Speaker output is canceled.
3
0
!
4
9
@
#
)
6
%
$
^
&
*
(
2
1
8
7
5
wREC (Except US model)
Starts tape recording.
Also used to enter 4-second blank spaces during
recording.
Tape: rewinds or fast forwards the tape. (Except US
Tuner: manually tunes up or down within the band.
8USB 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”for the details about the computer
requirements, how to connect and so on before actually
connecting your computer.
9LINE 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”.
0zEJECT
Ejects the disc(s).
!DISC SELECT (1-5)
Selects a disc slot.
Starts CD play for one desired disc.
@VOLUME
Adjusts the volume.
model)
dPRESET (Except US model)
Starts CD or tape play.
*MIC MIXING (Chilean and Peruvian
)ALBUM/PLAY LIST k,i
Skips to a previous or succeeding album or play list.
models)
Adjusts the microphone volume.
(MIC jack (Chilean and Peruvian models)
Connects the microphone.
TITLE
SECTION 2
GENERAL This section is extracted from
instruction manual.
•LOCATION OF CONTROLS
Main unit: rear
1
4
2
3
5
6
1AM LOOP jack and FM 75 Ωterminal
Plug in the supplied AM and FM antennas.
2AUX 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
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”(US model) or “MD”
(Chilean, Peruvian and Mexican models).
3AUX 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”(US model) or “MD”(Chilean,
Peruvian and Mexican models).
4VIDEO OUT
Signals from VIDEO IN jack output through this jack.
5#SPEAKERS terminals
Connect the speaker cords of the supplied speakers.
6AC power cord

7
CX-BK1
Remote commander
Refer to the pages indicated in parentheses for details.
1
4
6
7
9
8
0
!
@
5
3
2
Buttons with the same or similar names on the main unit
basicallyhavethesame function.
1POWER
21-9, 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.
3c/d
Starts CD play.
s
a
f/g
r/tPRESET
Tuner: selects a preset station.
M/NALBUM
Selects a previous or a succeeding album.
4PLAY MODE
REPEAT
Selects repeat CD playback mode.
5CLOCK/TIMER SET
Enters clock and timer setting mode.
CLOCK/TIMER SELECT
Switches timer setting on and off.
6DISPLAY
SOUND
Selects bass, treble or middle range level setting mode.
CLEAR
Clears a track of the CD programed playback and a tuner
preset station.
7SHIFT
Hold down when pressing a numbered button to change
its function to that printed above the number.
8FUNCTION
9DISC SKIP
Changes a disc slot.
0ENTER
!SLEEP
Selects sleep-timer mode.
@VOLUME +, -
EDIT (Chilean, Peruvian and Mexican
BAND
SPECTRUM
Changes the spectrum analyser display.
TUNER MODE
Switches between stereo or monaural FM reception.
models)
Selects edited CD recording.
KARAOKE (Chilean, Peruvian and
GEQ
Mexican models)
Selects a Karaoke mode.
Setting the clock
1 Press CLOCK/TIMER SET on the remote.
See below when to adjust the clock.
2 Press ror tto set the hour, then press
ENTER.
3 Press ror tto 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 ror t.
To adjust the clock
1 Press CLOCK/TIMER SET on the remote.
2Press ror trepeatedly to display “CLOCK”and
then press ENTER.
3Carry 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.

CX-BK1
8
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-2. PANEL
(Page 9)
3-5. MAIN BOARD
(Page 110)
3-15. BD BOARD
(Page 15) 3-22. TIMING BELT
(FRONT/REAR)
(Page 19)
3-23. CAM (GEAR)
(Page 19)
3-24. SENSOR BOARD
(Page 20)
3-10. AMP BOARD
(Page 13)
3-11. CD MECHANISM DECK
(CDM69BV-30CBD64NS)
(Page 13)
3-13. BASE UNIT SECTION
(Page 14) 3-16. SW (1) BOARD, SW (2) BOARD,
SW (3) BOARD,
SW (4) BOARD,
BRACKET (TOP) ASSY
(Page 16)
3-18. MOTOR (STOCKER)
ASSY (STOCKER)
(M761)
(Page 17)
3-17. CONNECTOR BOARD
(Page 16)
3-14. BASE UNIT
(BU-30CBD64NS)
(Page 15) 3-19. MOTOR (ROLLER)
ASSY (ROLLER)
(M781)
(Page 17)
3-21. RUBBER ROLLER
(SLIDER) ASSY
(Page 18)
3-20. MOTOR (MODE)
ASSY (MODE)
(M771)
(Page 18)
3-7. TUNER (FM/AM)
(Page 11) 3-8. SPEAKER BOARD (Page 12)
3-4. FRONT PANEL
ASSY
(Page 10)
3-6. REAR COVER
(Page 11) 3-7. TUNER (FM/AM) (Page 11) 3-8. SPEAKER BOARD
(Page 12)
3-12. SIGNAL
CASSETTE
MECHANISM
(Page 14)
3-3. TOP PANEL BLOCK
(Page 9)
3-9. ACDC BOARD, POWERTRANSFORMER
(Page 12)
SET 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.
Note 3: Tape deck is not loaded in US model.

CX-BK1
9
Note: Follow the disassembly procedure in the numerical order given.
3-2. PANEL
3-3. TOP PANEL BLOCK
1 three screws
(BVTP3
× 10)
6 three screws
(BVTP3
× 10)
7 four screws
(BVTP3
× 10)
2 four screws
(BVTP3
× 10)
5 panel (left)
3 four claws
8 four claws
4
9
0
right panel
1 three screws
(BVTP3
× 10)
2 three claws
4 wire (flat type) (8core)
(CN903)
3
6
top panel block
5 wire (flat type) (11core
)
(CN009)
• Tape deck is not loaded in US model.
The shape of the top panel shown in
“DISASSEMBLY” is different from the
actual shape.
• Tape deckisnotloadedinUSmodel.
The shape of the top panel shown
in “DISASSEMBLY” is different from
the actual shape.

CX-BK1
10
3 two screws
(BVTP3
× 10)
4 screw
(BVTP3
× 10
)
qa two screws
(BVTP3
× 6)
9 wire (flat type) (23core)
(CN902)
2 wire (flat type)
(11core: US, E51) (CN509)/
(15core: AEP, UK) (CN508)
1 wire (flat type) (11core)
(CN502)
6 wire (flat type) (11core)
(CN507)
7 connector
(CN007)
8 connector
(CN006)
qs main board
5
0
wire (flat type) (27core)
(CN901)
1 wire (flat type) (19core)
(CN905)
9 front panel assy
6 two screws
(BVTP3 × 10)
5 five screws
(BVTP3 × 10)
7 six screws
(BVTP3 × 10)
4 connector (CN530)
8 two claws
2 wire (flat type) (17core)
(CN004)
3 wire (flat type) (5core)
(CN504)
E51, MX
3-4. FRONT PANEL ASSY
3-5. MAIN BOARD

CX-BK1
11
3-6. REAR COVER
3-7. TUNER (FM/AM)
1 seven screws
(BVTP3
× 10
)
2
4
rear cove
r
3 connector
(CN303)
1 two screws
(BVTP3
× 8)
2 tuner (FM/AM)

CX-BK1
12
2 two screws
(BVTP3
× 10
)
1 connector
(CN503)
3 speaker board
3-8. SPEAKER BOARD
3-9. ACDC BOARD, POWER TRANSFORMER
4 two screws
(BVTP3 × 10)
5 seven screws
(BVTP3 × 10)
9 two screws
(ITC+4-8)
0 power transformer
8 connector
(CN010)
8 connector
(CN008)
E51
EXCEPT E51
7 connector
(E51, MX: CN015)/
(US: CN011)/
(AEP, UK: CN001)
3 connector (CN011)
2 connector (CN006)
1 connector (CN003)
6 ACDC board

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13
3-10. AMP BOARD
3-11. CD MECHANISM DECK (CDM69BV-30CBD64NS)
3 two screws
(BVTP3
× 10)
4 two screws
(BVTP3
× 10)
1 two screws
(BVTP3
× 10)
2 CD support board
5 AMP board
1 four screws
(BVTP3 × 10
)
2 four screws
(BVTP3 × 10)
3 disk mechanical cover
4 four screws
(BVTP3 × 10)
5 disk mecanical holder
6 CD mechanism deck
(CDM69BV-30CBD64NS)

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3-12. SIGNAL CASSETTE MECHANISM
1 connector
(CN302)
2 four screws
(BVTP3 × 10)
3 signal cassette mechanism
3-13. BASE UNIT SECTION
4 boss
6 boss
3 boss
5 boss
1 floating screw (DIA. 12)
2 screw (+PTPWH) (M2) (DIA. 7)
7 base unit section
• Tape deck is not loaded in US model.

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15
3-14. BASE UNIT (BU-30CBD64NS)
3-15. BD BOARD
1 tension spring (BU30-1)
qa base unit (BU-30CBD64NS)
8 vibration proof rubber
3 floating screw
(+PTPWHM2.6
× 6)
5 floating screw
(+PTPWHM2.6
× 6)
4 floating screw
(+PTPWHM2.6
× 6)
2 floating screw
(+PTPWHM2.6
× 6)
9 vibration proof rubber
q; vibration proof rubbers
7 vibration proof rubber
6
3 Remove the solde
r
(four portions).
5 BD board
4 wire (flat type) (16 core)
1 wire (flat type) (23 core)
2 wire (flat type) (11 core)

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16
3-16. SW (1) BOARD, SW (2) BOARD, SW (3) BOARD, SW (4) BOARD, BRACKET (TOP) ASSY
6 six screws
(BVTP2.6 × 8
)
5 SW (4) board
4 SW (3) board
3 SW (2) board
2 SW (1) board
7 bracket (top) assy
1 four screws
(BTP2.6 × 6)
3
1 Remove five solders.
– bottom view –
CONNECTOR board
2 four screws
(BVTP2.6
× 8
)
4 connector
(CN710)
5 connector
(CN703)
6 CONNECTOR board
3-17. CONNECTOR BOARD

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3-18. MOTOR (STOCKER) ASSY (STOCKER) (M761)
4
5 stocker motor board
3 two screws
(BVTP2.6 × 8)
2 Remove two solder
s
6 motor (stocker) assy
(stocker) (M761)
1 belt (stocker)
1 belt (roller V)
4 ROLLER MOTOR boar
d
2 Remove two solders.
3 two screws
5 motor (roller) assy
(roller)(M781)
3-19. MOTOR (ROLLER) ASSY (ROLLER) (M781)

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3-20. MOTOR (MODE) ASSY (MODE) (M771)
3-21. RUBBER ROLLER (SLIDER) ASSY
1 Remove five solders
of rotary encoder.
2 Remove two solders
of motor (M771)
MODE MOTOR
board
3 two screws
(BVTP2.6
× 8)
4 MODE MOTOR board
5 belt (mode V)
6 motor (mode) assy
(mode) (M771)
qg sub chassis
qf screw
(BVTP2.6
× 8)
8 step screw
qs step screw
5 step screw
9 tension
spring
(slider 2)
6 tension spring
(base slider 4)
0 rubber roller
(slider 4) assy
7 rubber roller
(slider 1) assy
qa rubber roller
(slider 2) assy
qd rubber roller
(slider 1) assy
3 tension spring
(base slider 5
)
1 step screw
4 rubber roller
(slider 5) assy
2 rubber roller
(slider S) assy

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3-22. TIMING BELT (FRONT/REAR)
3-23. CAM (GEAR)
Note: Refer to assembly (Section 4)
2 gear (mode cam)
: Note
1 screw
(PTPWH2.6
× 8)
3 slider (mode cam) assy
5 two gears
(center)
7 two gears (center)
8 timing belt (rear)
9 timing belt (rear)
4 gear
(timing)
6 timing belt
(front)
timing belt
(rear)
When install three timing belts,
its pass under each claws.
timing belt
(rear)
timing belt (front)
claw
claw
claw
claw
qf cam (gear)
: Note
qs gear(mode cam)
0 gear (mode C)
:Note
4 gear (mode 5)
8 gear (mode D)
6 gear (mode 5)
1 screw(PTPWH2.6 × 8)
7 screw (PTPWH2.6 × 8)
9 screw
(PTPWH2.6
× 8)
qa screw
(PTPWH2.6
× 8)
3 screw (PTPWH2.6 × 8)
5 screw (PTPWH2.6 × 8
)
2 pulley
(mode deceleration)
qd screw
Note: Refer to assembly
(Section 4).

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20
3-24. SENSOR BOARD
ql harness
qd gear (eject lock)
q; cam (eject lock)
: Note
qh two claws
qj rotary encode
r
(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).