Sharp CDBK-2700-V Service manual

CD-BK260V/CD-BK2700V/CD-BK280V

SERVICE MANUAL

No. S6139CDBK260V

VIDEO CD MINI SYSTEM

MODEL CD-BK260V

CD-BK260V Video CD Mini System consisting of
CD-BK260V (main unit) and CP-BK260 (speaker system).

Illustration: CD-BK260V/CD-BK2700V

VIDEO CD MINI SYSTEM

MODEL CD-BK2700V

CD-BK2700V Video CD Mini System consisting of
CD-BK2700V (main unit) and CP-BK2700 (speaker system).

VIDEO CD MINI SYSTEM

MODEL CD-BK280V

Illustration: CD-BK280V

NTSC/PAL

CONTENTS

SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2

VOLTAGE SELECTION..................................................................................................................................................... 2

AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ................................................................................................. 2

SPECIFICATIONS ............................................................................................................................................................. 3

NAMES OF PARTS ........................................................................................................................................................... 4

OPERATION MANUAL ...................................................................................................................................................... 7

DISASSEMBLY.................................................................................................................................................................. 9

REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 12

ADJUSTMENT ................................................................................................................................................................. 13

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 18

TYPES OF TRANSISTOR AND LED............................................................................................................................... 18

BLOCK DIAGRAM ........................................................................................................................................................... 19

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................22

VOLTAGE ........................................................................................................................................................................ 43

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 44

TROUBLESHOOTING..................................................................................................................................................... 45

FUNCTION TABLE OF IC................................................................................................................................................ 49

FL DISPLAY..................................................................................................................................................................... 60

REPLACEMENT PARTS LIST/EXPLODED VIEW

CD-BK280V Video CD Mini System consisting of
CD-BK280V (main unit), CP-BK280 (front speakers)
and GBOXS0070AWM1 (surround speakers).

• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.

Page

SHARP CORPORATION

– 1 –

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

CD-BK260V/CD-BK2700V/CD-BK280V

SAFETY PRECAUTION FOR SERVICE MANUAL

WARNINGS

THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER
COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR CLASS 1. THEREFORE IT IS
IMPORTANT THAT THE FOLLOWING PRECAUTIONS ARE OBSERVED DURING SERVICING TO PROTECT YOUR EYES
AGAINST EXPOSURE TO THE LASER BEAM.

1-WHEN THE CABINET IS REMOVED, THE POWER IS TURNED ON WITHOUT A COMPACT DISC IN POSITION AND THE

PICKUP IS ON THE OUTER EDGE THE LASER WILL LIGHT FOR SEVERAL SECONDS TO DETECT A DISC. DO NOT
LOOK INTO THE PICKUP LENS.

2-THE LASER POWER OUTPUT OF THE PICKUP UNIT AND REPLACEMENT SERVICE PARTS ARE ALL FACTORY

PRESET BEFORE SHIPMENT.

DO NOT ATTEMPT TO READJUST THE LASER PICKUP UNIT DURING REPLACEMENT OR SERVICING.
3-UNDER NO CIRCUMSTANCES STARE INTO THE PICKUP LENS AT ANY TIME.
4-CAUTION-USE OF CONTROLS OR ADJUSTMENTS, OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE

SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW

CAUTION-INVISIBLE LASER RADIATION WHEN OPEN. DO NOT STARE INTO BEAM
OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.

VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA EJ
IN I STRALEN OCH BETRAKTA EJ STRALEN MED OPTISKA INSTRUMENT.

ADVERSEL-USYNLIG LASERSTRALING VED ABNING. SE IKKE IND I
STRALEN-HELLER IKKE MED OPTISKE INSTRUMENTER.

VARO! AVATTAESSA OLET ALTTIINA NAKYMATON LASERSATEILYLLE. ALA
TUIJOTA SATEESEEN ALAKA KATSO SITA OPTISEN LAITTEEN LAPI.

VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA EJ
IN I STRALEN OCH BETRAKTA EJ STRALEN GENOM OPTISKT INSTRUMENT.

ADVERSEL-USYNLIG LASERSTRALING NAR DEKSEL APNES. STIRR IKKE INN I
STRALEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER.

VOLTAGE SELECTION

Before operating the unit on mains, check the preset voltage. If the voltage is different from your local voltage, adjust the voltage
as follows.
Turn the selector with a screwdriver until the appropriate voltage number appears in the window (110 V, 127 V, 220 V or 230 V-240 V AC).

AC POWER SUPPLY CORD AND AC PLUG ADAPTOR

QACCA0003AW00

QACCJ0007AW00

QACCE0010AW00

QPLGA0003AWZZ QPLGA0004AWZZ

– 2 –

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.

CD-BK260V/CD-BK2700V

CD-BK260V/CD-BK2700V/CD-BK280V

SPECIFICATIONS

CD-BK280V

General

Power source
Power consumption
Dimensions

Weight

AC 110/127/220/230 - 240 V, 50/60 Hz
130 W
Width: 270 mm (10-11/16")

Height: 330 mm (13")
Depth: 340 mm (13-3/8")

7.2 kg (15.7 lbs.)

Amplifier

Output power

Output terminals

Input terminals

MPO: 240 W (120 W + 120 W) (10 % T.H.D.)
RMS: 150 W (75 W + 75 W) (10 % T.H.D.)
RMS: 104 W (52 W + 52 W) (0.9 % T.H.D.)
Speakers: 6 ohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)
Video/Auxiliary (audio signal): 500 mV/47 kohms
Microphone: 1 mV/600 ohms

Video CD

Video output format

PAL/NTSC

CD player

Type
Signal readout
D/A converter
Frequency response
Dynamic range

3-disc multi-play compact disc player
Non-contact, 3-beam semiconductor laser pickup
1-bit D/A converter
20 - 20,000 Hz
90 dB (1 kHz)

Tuner

Frequency range

FM: 88 - 108 MHz
AM: 531 - 1,602 kHz

Cassette deck

Frequency response
Signal/noise ratio

Wow and flutter

CP-BK260/CP-BK2700

Type

Maximum input power
Rated input power
Impedance
Dimensions

Weight

Specifications for this model are subject to change without
prior notice.

50 - 14,000 Hz (Normal tape)
55 dB (TAPE 1, playback)

50 dB (TAPE 2, recording/playback)

0.3 % (WRMS)

2-way type speaker system
5 cm (2") Tweeter
13 cm (5-1/4") Woofer
150 W
75 W
6 ohms
Width: 220 mm (8-11/16")

Height: 330 mm (13")
Depth: 217 mm (8-9/16")

3.3 kg (7.3 lbs.)/each

General

Power source
Power consumption
Dimensions

Weight

Amplifier

Output power

Output terminals

Input terminals

Video CD

Video output format

CD player

Type
Signal readout
D/A converter
Frequency response
Dynamic range

Tuner

Frequency range

Cassette deck

Frequency response
Signal/noise ratio

Wow and flutter

CP-BK280

Type

Maximum input power
Rated input power
Impedance
Dimensions

Weight

GBOXS0070AWM1

Type
Maximum input power
Rated input power
Impedance
Dimensions

Weight

AC 110/127/220/230 - 240 V, 50/60 Hz
130 W
Width: 270 mm (10-11/16")

Height: 330 mm (13")
Depth: 340 mm (13-3/8")

7.4 kg (16.1 lbs.)

Front speakers:
MPO: 160 W (80 W + 80 W) (10 % T.H.D.)
RMS: 100 W (50 W + 50 W) (10 % T.H.D.)
RMS: 70 W (35 W + 35 W) (0.9 % T.H.D.)
Surround speakers:
MPO: 80 W (40 W + 40 W) (10 % T.H.D.)
RMS: 50 W (25 W + 25 W) (10 % T.H.D.)
RMS: 34 W (17 W + 17 W) (0.9 % T.H.D.)
Front speakers: 8 ohms
Surround speakers: 16 ohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)
Video out: 1 Vp-p (75 ohms)
Video/Auxiliary (audio signal): 500 mV/47 kohms
Microphone: 1 mV/600 ohms

PAL/NTSC

3-disc multi-play compact disc player
Non-contact, 3-beam semiconductor laser pickup
1-bit D/A converter
20 - 20,000 Hz
90 dB (1 kHz)

FM: 88 - 108 MHz
AM: 531 - 1,602 kHz

50 - 14,000 Hz (Normal tape)
55 dB (TAPE 1, playback)

50 dB (TAPE 2, recording/playback)

0.3 % (WRMS)

2-way type speaker system
5 cm (2") Tweeter
13 cm (5-1/4") Woofer
100 W
50 W
8 ohms
Width: 220 mm (8-11/16")

Height: 330 mm (13")
Depth: 217 mm (8-9/16")

3.3 kg (7.3 lbs.)/each

10 cm (4") full-range speaker
50 W
25 W
16 ohms
Width: 200 mm (7-7/8")

Height: 93 mm (3-11/16")
Depth: 170 mm (6-3/4")

0.5 kg (1.1 lbs.)/each

– 3 –

CD-BK260V/CD-BK2700V/CD-BK280V

NAMES OF PARTS

Front panel

CD-BK260V/CD-BK2700V/CD-BK280V

1. Video CD/CD/MP3 Disc Tray

2. Timer Set Indicator

3. On/Stand-by Button

4. Tape 2 Cassette Compartment

5. Tape 1 Cassette Compartment

6. Equalizer Mode Select Button

7. Volume Up and Down Buttons

8. Extra Bass/Demo Mode Button

9. Video CD/CD/MP3 Disc Tray Open/Close Button

10. Video CD/CD/MP3 Disc Skip Button

11. Tape 2 Reverse Play Button

12. Video CD/CD/MP3 Disc Button

13. Karaoke Mode Button

14. Tuner (Band) Button

15. Video CD Playback Control Button

16. Video CD On Screen Display On/Off Button

17. Video CD Digest Button

18. Tuning and Time Up Button

19. Dimmer Button

20. Clock Button

21. Timer/Sleep Button

22. Headphone Socket

23. Video/Auxiliary Button

24. Tape (1 2) Button

25. Video CD Stop or Return, CD/MP3 Disc/Tape
Stop Button

26. Video CD Play or Repeat or Select or Resume,
CD/MP3 Disc Play or Repeat, Tape 1 Play,
Tape 2 Forward Play Button

27. Tape 2 Reverse Mode Select Button

28. Video CD Skip or Next, CD/MP3 Disc
Track Up or Fast Forward,

Tape 2 Fast Wind, Tuner Preset Up Button

29. Tuning and Time Down Button

30. Memory/Set Button

31. Tape 2 Record Pause Button

32. Video CD Skip or Previous, CD/MP3 Disc
Track Down or Fast Reverse, Tape 2 Fast Wind,
Tuner Preset Down Button

33. Microphone Level Control

34. Microphone Socket

1
2

3

18
19
20

21
22

67

1412 1311

29 30 31 33 3432

8

9
10

4
5

1615 17

23
24
25
26
27
28

Display

CD-BK260V/CD-BK2700V/CD-BK280V

1. Extra Bass Indicator

2. FM Stereo Mode Indicator

3. FM Stereo Receiving Indicator

4. Karaoke Mode Indicator

5. Video CD/CD/MP3 Disc Repeat Play Indicator

6. Video CD/CD/MP3 Disc Pause Indicator

7. Video CD/CD/MP3 Disc Play Indicator

8. Tape 2 Record Indicator

9. Tape Reverse Mode Indicator

10. Video CD/CD/MP3 Disc Number Indicators

11. Timer Play Indicator

12. Memory Indicator

13. Tape 2 Reverse Play Indicator

14. Tape 1 Play or Tape 2 Forward Play Indicator

15. Sleep Indicator

16. Timer Recording Indicator

17. Spectrum Analyser/Volume Level Indicator

1
2

34 6

– 4 –

8
9

5

17

17 17

10
11

12

13 14 15 167

Rear panel

CD-BK260V/CD-BK2700V

CD-BK260V/CD-BK2700V/CD-BK280V

1. Video Output Socket

2. FM 75 Ohms Aerial Terminal

3. FM Aerial Earth Terminal

4. AM Loop Aerial Socket

5. Span Selector Switch

6. Video/Auxiliary (Audio Signal) Input Sockets

7. Speaker Terminals

8. AC Power Lead

9. AC Voltage Selector

CD-BK280V

1. Surround Speaker Terminals

2. Video Output Socket

3. FM 75 Ohms Aerial Terminal

4. FM Aerial Earth Terminal

5. AM Loop Aerial Socket

6. Span Selector Switch

7. Video/Auxiliary (Audio Signal) Input Sockets

8. Front Speaker Terminals

9. AC Power Lead

10. AC Voltage Selector

1
2

3
4

5
6
7

9

8

1
2
3

4
5
6
7

8

Speaker system

CP-BK260/CP-BK2700

1. Tweeter

2. Woofer

3. Bass Reflex Duct

4. Speaker Wire

10

9

1

2

3

3

4

– 5 –

CD-BK260V/CD-BK2700V/CD-BK280V

Front speaker

CP-BK280

1. Tweeter

2. Woofer

3. Bass Reflex Duct

4. Speaker Wire

Surround speaker (CD-BK280V Only)

GBOXS0070AWM1

1. Full-Range Speaker

2. Speaker Wire

Remote control

CD-BK260V/CD-BK2700V/CD-BK280V

1

2

3

3

4

1

2

1

1. Remote Control Transmitter

2. Video CD/CD/MP3 Disc Number Select Buttons

3. Echo Level Up and Down Buttons

4. Karaoke Mode Button

5. Video CD Auto/On Button

6. Video CD Playback Control Auto/Off Button

7. Video CD On Screen Display On/Off Button

8. Video CD/CD/MP3 Disc Clear Button

9. Video CD Digest/Time Search Button

10. Video CD Skip or Previous, CD/MP3 Disc Track Down or

Fast Reverse, Tape 2 Fast Wind,
Tuner Preset Down Button

11. Video CD Bookmark Button

12. Tape 2 Reverse Play Button

13. PAL/NTSC Select Button

14. Video CD/CD/MP3 Disc Button

15. Tape (1

16. On/Stand-by Button

17. MP3 Disc Display Button

18. Video CD/CD/MP3 Disc Direct Search Buttons

19. Video CD/CD/MP3 Disc Random Button

20. Video CD/CD/MP3 Disc Memory Button

21. Video CD Skip or Next, CD/MP3 Disc Track Up or

Fast Forward, Tape 2 Fast Wind,
Tuner Preset Up Button

22. Video CD/CD/MP3 Disc Pause Button

23. Video CD Play or Repeat or Select or Resume,

CD/MP3 Disc Play or Repeat, Tape 1 Play,
Tape 2 Forward Play Button

24. Video CD Stop or Return, CD/MP3 Disc/Tape
Stop Button

25. Extra Bass Button

26. Equalizer Mode Select Button

27. Volume Up and Down Buttons

28. Tape 2 Record Pause Button

29. Tuner (Band) Button

30. Video/Auxiliary Button

2) Button

10
11
12
13
14
15

2

16
17

3
4

18

5
6

19

7

20

8
9

21
22

23
24

25
26

27
28

29
30

Buttons with " " mark in the illustration can be operated on the remote control
only.
Other buttons can be operated both on the main unit and the remote control.

– 6 –

OPERATION MANUAL

g

Setting the Clock

In this example, the clock is set for the 24-hour (0:00) display.

1

Press the ON/STAND-BY button to turn the power on.

2

Press the CLOCK button and within 5 seconds, press the MEMO-.
RY/SET button

3

Press the TUNING/TIME ( or ) button to select 24-hour or 12­hour display and then press the MEMORY/SET button.

"0:00" The 24-hour display will appear.

"AM 12:00" The 12-hour display will appear.

"AM 0:00" The 12-hour display will appear.

Note that this can only be set when the unit is first installed or it has been reset.
[Refer to "Clearing all the memory (reset)".]

(0:00 - 23:59)

(AM 12:00 - PM 11:59)

(AM 0:00 - PM 11:59)

CD-BK260V/CD-BK2700V/CD-BK280V

4

Press the TUNING/TIME ( or ) button to adjust the hour and then
press the MEMORY/SET button.

Press the TUNING/TIME ( or ) button once to advance the time by 1 hour.
Hold it down to advance continuously.

When the 12-hour display is selected, "AM" will change automatically to "PM".

5

Press the TUNING/TIME ( or ) button to adjust the minutes and
then press the MEMORY/SET button.

Press the TUNING/TIME ( or ) button once to advance the time by 1
minute. Hold it down to change the time in 5-minute intervals.

The hour will not advance even if minutes advance from "59" to "00".
The clock begins counting from "0" seconds. (Seconds are not displayed.)

The time display will disappear after a few seconds.

To confirm the time display:

Press the CLOCK button.
The time display will appear for about 5 seconds.

Note:

The "CLOCK" or time will flash at the push of the CLOCK button when the AC power
supply is restored after a power failure or unplugging the unit.
Readjust the clock as follows.

To readjust the clock:

Perform "Setting the Clock" from the beginning. If the time display is flashing, step 3
(for selecting the 24-hour or 12-hour display) will be skipped.

To change the 24-hour or 12-hour display:

1 Clear all the programmed contents. [Refer to "Clearing all the memory (reset)".]
2 Perform "Setting the Clock" from the beginning.

Setting the AC voltage selector

Check the setting of the AC voltage selector located on the rear panel before plug­ging the unit into a wall socket. If necessary, adjust the selector to correspond to the
AC power voltage used in your area.

Turn the selector with a screwdriver until the appropriate voltage num­ber appears in the window (110 V, 127 V, 220 V or 230 V - 240 V AC).

Connecting the AC power lead

After making all connections, plug the unit. If you plug the unit first,
the unit will enter the demonstration mode.

Note:

Unplug the AC power lead from the wall socket if the unit will not be in use for a pro­longed period of time.

AC Plug Adaptor

In areas (or countries) where a wall socket as shown in illustration is used, connect
the unit using the AC plug adaptor supplied with the unit, as illustrated. The AC plug
adaptor is not included in areas where the wall socket and AC power plug can be
directly connected (see illustration ).

1

2

Setting the FM/AM span selector

The International Telecommunication Union (ITU) has established that member coun­tries should maintain either a 100 kHz or a 50 kHz interval between broadcasting fre­quencies of FM stations and 10 kHz or 9 kHz for AM station. The illustration shows
the 50/9 kHz zones (regions 1 and 3), and the 100/10 kHz zone (region 2).
Before using the unit, set the SPAN SELECTOR switch (on the rear panel) to the
interval (span) of your area.

To change the tuning zone:

1 Press the ON/STAND-BY button to enter the stand-by mode.
2 Set the SPAN SELECTOR switch (on the rear panel) as follows.

For 50 kHz FM interval (9 kHz in AM) 50/9
For 100 kHz FM interval (10 kHz in AM) 100/10

3 Whilst pressing down the button and the X-BASS/DEMO button, press the ON/

STAND-BY button until "CLEAR AL" appears.

Caution:

This operation will erase all data stored in memory including clock, timer settings,
tuner preset, and CD pro

ramme.

– 7 –

CD-BK260V/CD-BK2700V/CD-BK280V

Troubleshooting Chart

Many potential problems can be resolved by the owner without calling a service tech­nician.
If something is wrong with this product, check the following before calling your autho­rised SHARP dealer or service centre.

General

Symptom Possible cause

The clock is not on time. Did a power failure occur? Reset the

When a button is pressed, the unit
does not respond.

No sound is heard. Is the volume level set to "0" ?

clock.
Set this unit to the power stand-by mode

and then turn it back on.
If the unit still malfunctions, reset it.

Are the headphones connected ?
Are the speaker wires disconnected ?
Is the karaoke mode set to "L-CH", "R-CH"

or "V-CANCEL" ?

Video CD

Symptom Possible cause

The picture is not displayed during
playback.

The picture quality is poor, or it is
distorted.

Is the TV unplugged ?
Is the unit connected improperly ?
Is the input selector on the TV set to other

than "VCR" ?
Is the unit being played without selecting

video CD ?
Is the disc very dirty ?

CD player

Symptom Possible cause

Playback does not start. Is the disc loaded upside down ?
Playback stops in the middle or is

not performed properly.
Playback sounds are skipped, or

stopped in the middle of a track.

Does the disc satisfy the standards ?
Is the disc distorted or scratched ?
Is the unit located near excessive vibra-

tions ?
Is the disc very dirty ?
Has condensation formed inside the unit ?

Tuner

Symptom Possible cause

Radio makes unusual noise con­secutively.

Is the unit placed near the TV or comput­er ?

Is the FM aerial or AM loop aerial placed
properly? Move the AC power lead away
from the aerial if located near.

Cassette deck

Symptom Possible cause

Cannot record. Is the erase-prevention tab removed?
Cannot record tracks with proper

sound quality.
Cannot erase completely.
Sound skipping. Is there any slack?

Cannot hear treble. Are the capstans, pinch rollers, or heads
Sound fluctuation.
Cannot remove the tape. If a power failure occurs during playback,

Is it a normal tape? (You cannot record on
a metal or CrO tape.)

Is the tape stretched?
dirty?

the heads remain engaged with the tape.
Do not open the compartment forcibly.
Wait until electricity resumes.

Karaoke

Symptom Possible cause

The vocal part of a multiplexed
disc is not heard.

Is the karaoke mode set to "L-CH", "R-CH"
or "V-CANCEL"?

Remote control

Symptom Possible cause

The remote control does not oper­ate.

Is the AC power lead of the unit plugged
in?

Is the battery polarity respected?
Are the batteries dead?
Is the distance or angle incorrect?
Does the remote control sensor receive

strong light?

Troubleshooting Chart

If trouble occurs

When this product is subjected to strong external interference (mechanical shock,
excessive static electricity, abnormal supply voltage due to lightning, etc.) or if it is
operated incorrectly, it may malfunction.

If such a problem occurs, do the following:

1 Set the unit to the stand-by mode and turn the power on again.
2 If the unit is not restored in the previous operation, unplug and plug in the unit,

and then turn the power on.

Note:

If neither operation above restores the unit, clear all the memory by resetting it.

Clearing all the memory (reset)

1 Press the ON/STAND-BY button to enter the power stand-by mode.
2 Whilst pressing down the button and the X-BASS/DEMO button, press the ON/

STAND-BY button until "CLEAR AL" appears.

Caution:

This operation will erase all data stored in memory including clock, timer settings,
tuner preset, and CD programme.

Before transporting the unit

1 Press the ON/STAND-BY button to turn the power on.
2 Press the CD/VIDEO CD button.
3 Press the OPEN/CLOSE button to open the disc tray.

Remove all discs from the unit.

4 Press the OPEN/CLOSE button to close the disc tray.

Make sure that "NO DISC" is displayed.

5 Press the ON/STAND-BY button to enter the stand-by mode, and then unplug

the AC power lead from the wall socket.

Remote Control

Test of the remote control

Face the remote control directly to the remote sensor on the unit.

The remote control can be used within the range shown below:

Press the ON/STAND-BY button. Does the power turn on? Now, you can enjoy the
music.

Remote sensor

0.2 m - 6 m
(8" - 20')

– 8 –

(B1)x4
ø3x10mm

(B1)x2
ø3x10mm

Rear
Panel

(B1)x2
ø3x10mm

Side Panel
(Right)

Side Panel
(Left)

(A1)x2
ø3x12mm

(A1)x2
ø3x12mm

Top Cabinet

Caution on Disassembly

Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:

1. Take cassette tape and compact disc out of the unit.

2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.

3. Take off nylon bands or wire holders where they need to
be removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.

4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.

CD-BK260V/CD-BK2700V/CD-BK280V

STEP

1 Top Cabinet 1. Screw ...................... (A1) x4 9-1

2 Side Panel 1. Screw ...................... (B1) x8 9-1

3 CD Player Unit/ 1. Turn on the power supply, .. 9-2

4 Rear Panel with 1. Screw .................... (D1) x11 9-2

5 Main PWB 1. Screw ...................... (E1) x3

6 Front Panel 1. Screw .......................(F1) x2 10-3

7 Display PWB 1. Knob........................ (G1) x1 10-4

8 Tape Mechanism 1. Open the cassette holder. .. 10-4

9

10 Mic PWB 1. Screw ...................... (K1) x2 10-4

11 Turntable 1. Hook......................... (L1) x2 10-5

12 Disc Tray 1.

13 CD Video PWB 1. Screw ...................... (N1) x1 11-1

14 CD Mechanism 1. Hook........................ (P1) x2 11-2

REMOVAL

(Left/Right)

CD Tray Cover open the disc tray, take out

Video Out PWB/
Surround PWB
(CD-BK280V)/ (For CD-BK280V)

Fan Motor 2. Socket ..................... (D2) x1

Headphones PWB

(Note 2) 2. Hook........................ (N2) x2

the CD tray cover, and close.
(Note 1)

2. Screw ...................... (C1) x1

3. Hook........................ (C2) x3

4. Hook........................ (C3) x2

5. Socket ..................... (C4) x4

1. Screw .................... (D1) x14

2. Socket ..................... (D2) x2

(For CD-BK280V)

2. Socket ..................... (E2) x4 10-3

3. Flat Cable ............... (E3) x1

4. Flat Wire.................. (E4) x1

2. Screw ....................(G2) x12

3. Flat Cable ...............(G3) x1

2. Screw...................... (H1) x5

1. Screw .......................(J1) x1 10-4

2. Tip ........................... (K2) x1

(CD-BK280V Only)

2. Cover ....................... (L2) x1

2.

3.

3. Socket ..................... (N3) x4

2. Hook........................ (P2) x3

PROCEDURE

(For CD-BK260V/CD-BK2700V)

(For CD-BK260V/CD-BK2700V)

Turn fully the lock lever in the
arrow direction
While holding the lock lever,rotate
the cam gear until the cam gear
rib engages with the clamp lever.

Push the slide chassis backward
to engage the claw with the
groove and remove it in the
direction of the arrow..(M1) x6

.

CD-BK260V/CD-BK2700V/CD-BK280V

DISASSEMBLY

Note 1: How to open the changer manually. (Fig. 10-1)

1. In this state, turn fully the lock lever in the arrow direction through
the hole on the loading chassis bottom.

2.

While holding the lock lever, rotate the cam gear anticlockwise until the

cam gear rib engages with the clamp lever.

3. After that, push forward the slide chassis.

Note 2:

1. After removing the connector for the optical pickup from the

connector, wrap the conductive aluminium foil around the front end
of the connector so as to protect the optical pickup from electro­static damage.

Note 3:

1. Be careful not to break the claw of the CD mechanism.

2. When fining back the cam gear assembly, let it lock by front

movement.

CD-BK260V/CD-BK2700V/CD-BK280V

FIGURE

9-2,10-3

10-1
10-2

10-6

Illustration: CD-BK280V

CD Servo
PWB

(C3)x1

Pull

(D2)x1

(D2)x1

CD-BK280V
ONLY

(C1)x1
ø3x10mm

Rear
Panel

(D1)x3
ø3x10mm

CD-BK280V
ONLY

– 9 –

(C4)x4

(D1)x9
ø3x10mm

Figure 9-1

Main PWB

Figure 9-2

(Fig. 10-2)

1

Pull

(D1)x2
ø3x10mm

CD Tray Cover

1

CD Player
Unit

(C3)x1

(E1)x1
ø3x10mm

Lug Wire

(C2)x3

2

CD-BK260V/CD-BK2700V/CD-BK280V

Figure 10-1

Lock Lever

CD Player Unit
(Bottom View)

Clamp Lever

Display
PWB

(G2)x12
ø3x10mm

Tape
Mechanism

Lug Wire

(H1)x5
ø3x10mm

(J1)x1
ø3x10mm

Headphones
PWB

(G3)x1

Lug Wire

Figure 10-4

(L2)x1

(G1)x1

(K1)x2
ø3x10mm

CD-BK280V
ONLY

(K2)x1

Mic PWB

Front
Panel

Open

Cassette
Holder

(E2)x1

Power PWB

(E3)x1

Transformer
PWB

(E2)x1

(E1)x2

ø3x10mm

(E2)x1

Figure 10-2

(E2)x1

CD Player Unit
(Top View)

Cam Gear Rib

(E4)x1

Headphones
PWB

Front Panel

Turntable

Slide
Chassis

(L1)x2

CD Player Unit

Figure 10-5

(M1)x3

3

2

Main PWB

Figure 10-3

Mic PWB

(F1)x2

ø3x8mm

1

(M1)x3

Figure 10-6

– 10 –

CD-BK260V/CD-BK2700V/CD-BK280V

(N2)x2

(N3)x2

(N1)x1
ø3x8mm

(N3)x2

CD Video

PWB

Figure 11-1

Slide
Chassis

CD
Mechanism

(P1)x1

(P2)x3

(P1)x1

Slide
Chassis

Figure 11-2

CP-BK260/CP-BK2700/CP-BK280

STEP

Front Panel

REMOVAL PROCEDURE

1 Front Panel 1. Net.......................... (A1) x1 11-3

2 Woofer 1. Screw ..................... (B1) x4 11-4

3 Tweeter 1. Screw ..................... (C1) x2 11-4

(A1)x1

Screwdriver

Driver should
be pried away

Speaker Box

from Speaker Box.

Figure 11-3

FIGURE

(C1)x2

ø3x10mm

Tweeter

(B1)x4

ø4x12mm

Woofer

Figure 11-4

– 11 –

CD-BK260V/CD-BK2700V/CD-BK280V

REMOVING AND REINSTALLING THE MAIN PARTS

TAPE MECHANISM SECTION

Perform steps 1 to 6 and 8 of the disassembly method to
remove the tape mechanism.

How to remove the record/playback and erase
heads (TAPE 2) (See Fig. 12-1)

1. When you remove the screws (A1) x 2 pcs., the recording/
playback head and three-dimensional head of the erasing
head can be removed.

How to remove the playback head (TAPE 1)
(See Fig. 12-2)

1. When you remove the screws (B1) x 2 pcs., the playback
head.

How to remove the pinch roller (TAPE 1/2)
(See Fig. 12-3)

1. Carefully bend the pinch roller pawl in the direction of the
arrow <A>, and remove the pinch roller (C1) x 1 pc., in the
direction of the arrow <B>.

Note:

When installing the pinch roller, pay attention to the spring
mounting position.

Erase Head

(A1) x 2
Ø2 x 6mm

Figure 12-1

TAPE 2

TAPE 1

Clutch Ass'y

Record/Playback
Head

Clutch Ass'y

Playback
Head

How to remove the belt (TAPE 2) (See Fig. 12-4)

1. Remove the main belt (D1) x 1 pc., from the motor side.

2. Remove the FF/REW belt (D2) x 1 pc.

How to remove the belt (TAPE 1) (See Fig. 12-4)

1. Remove the main belt (E1) x 1 pc., from the motor side.

2. Remove the FF/REW belt (E2) x 1 pc.

How to remove the motor (See Fig. 12-5)

1. Remove the screws (F1) x 2 pcs., to remove the motor.

Motor

Clutch Ass'y

TAPE 2

(B1) x 1
Ø2 x 9mm

Pinch Roller
(C1) x 1

FF/REW
Belt
(D2) x 1

(B1) x 1
Ø2 x 5mm

Figure 12-2

Pull

<B>

Figure 12-3

Motor

Pull

Pinch
Roller
Pawl

<A>

TAPE 2
Main Belt
(D1) x 1

Motor

TAPE 1
Main Belt
(E1) x 1

(F1) x 2

Ø2.6 x 5mm

– 12 –

Main Belt
(D1) x 1

Main Belt
(E1) x 1

Figure 12-4Figure 12-5

TAPE 1

FF/REW
Belt
(E2) x 1

CD-BK260V/CD-BK2700V/CD-BK280V

CD MECHANISM SECTION

Perform steps 1, 2, 3, 11,12, 13 and 14 of the disassembly
method to remove the CD mechanism.

How to remove the loading motor
(See Fig. 13-1)

1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.

2. Remove the drive belt (A2) x 1pc.

How to remove the pickup (See Fig. 13-2)

1. Remove the stop washer (B1) x 1 pc., to remove the gear
(B2) x 1 pc.

2. Remove the screws (B3) x 2 pcs., to remove the shaft
(B4) x 1 pc.

3. Remove the pickup.

Note

After removing the connector for the optical pickup from the
connector wrap the conductive aluminium foil around the front
end of connector so as to protect the optical pickup from
electrostatic damage.

Slide
Chassis

(B3)x2
ø2.6x6mm

Loading Motor

(A1)x2

Figure 13-1

Stop Washer
(B1)x1

Pulley

Drive Belt
(A2)x1

Loading
Motor PWB

(A1)x1

(A1)x2

Loading
Motor

ADJUSTMENT

MECHANISM SECTION

• Driving Force Check

Torque Meter Specified Value

Play: TW-2111 Tape 1: Over 80 g

• Torque Check

Torque Meter

Play: TW-2111 30 to 80 g.cm 30 to 80 g.cm
Fast forward: TW-2231 — 70 to 180 g.cm
Rewind: TW-2231 — 70 to 180 g.cm

Tape 2: Over 80 g

Specified Value

Tape 1

Tape 2

Pickup

Shaft
(B4)x1

Gear

CD Mechanism

(B2)x1

Figure 13-2

• Tape Speed

Test Tape

Normal MTT-111 Variable 3,000 ± 30 Hz Speaker
speed Resistor in Terminal

Adjusting

Point

motor. (Load

Specified

Value

TAPE MECHANISM

Instrument

Connection

resistance:
6 ohms)

– 13 –

Tape
Motor

Variable Resistor in motor

Figure 13-3

CD-BK260V/CD-BK2700V/CD-BK280V
TUNER SECTION

fL: Low-range frequency
fH: High-range frequency

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage

AM IF 450 kHz 1,602 kHz T351 *1
AM Band — 531 kHz (fL): T306 *2

Coverage 1.1 ± 0.1 V
AM Tracking 990 kHz 990 kHz (fL): T303 *1

*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301

Frequency Frequency

Display

Setting/

Adjusting

Parts

FM BAND
COVERAGE fL

SO302

FM ANTENNA

TERMINAL

Instrument

Connection

T301

T351

• FM RF

Signal generator: 1 kHz, 40 kHz dev., FM modulated

Test Stage

FM Band — 87.50 MHz T301(fL): *1
Coverage 1.3 V ± 50 mV

FM RF 98.00 MHz 98.00 MHz L312 *2

Frequency Frequency

Display

(10-30 dB)

Adjusting

*1. Input: Antenna Output: TP301
*2. Input: Antenna Output: Speaker terminal

CNP301

IC301

AM LOOP
ANTENNA

T302

FM IF

L312

FM RF

T303

AM BAND
COVERAGE fL

MAIN PWB

AM
TRACKING fL

R316

TP301

T306

Setting/

Point

Instrument

Connection

AM IF

Figure 14-1 ADJUSTMENT POINTS

CD SECTION

• Adjustment

Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacing the pickup. Therefore, different PWBs and pickups
can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.

Items adjusted automatically

(1) Offset adjustment (The offset voltage between the head

amplifier output and the VREF reference voltage is
compensated inside the IC.)

* Focus offset adjustment
* Tracking offset adjustment

(2) Tracking balance adjustment (waveform drawing

Fig.14-2 EFBL)

(3) Gain adjustment (The gain is compensated inside the IC

so that the loop gain at the gain crossover frequency will
be 0 dB.)

* Focus gain adjustment
* Tracking gain adjustment

TP302

R357

CD ERROR CODE DESCRIPTION

Error

[Servo System Error]
0001 Cannot detect Pickup-in SW
0002 DSP access error

[Error during close operation]
0101 Open/Close SW not functioning (Low → High)
0103 Open/Close SW not functioning (High → Low)

[Error during open operation]
0201 Open/Close SW not functioning (Low → High)
0203 Open/Close SW not functioning (High → Low)

[Error during skip operation]
0302 Pickup-in SW is not detected
0306 During Disc 1 search, Open/Close SW or Clamp SW

or Disc SW do not change to low.
0307 Clamp SW not function (Low → High)
0308 Clamp SW not function (High → Low)

CH1=500 mV

DC 10:1

FDO

TE

T

CH2=200 mV

DC 10:1

T

1

3

Stopped

State Code

CH3=1 V

DC 10:1

1999/04/05 20:26:47

500 ms/div

(500 ms/div)

NORM:20 kS/s

– 14 –

EFBL

2

Smoothing : ON CH1 : 0.000 V
BW : FULL

CH2 : 0.000 V
CH3 : 0.00 V
CH4 : 0.00 V

Figure 14-2

=Record Length=

Main : 100K
Zoom : 2k

CH2
v/DIV
200 mV

=Trigger==Filter= =Offset=
Mode : SINGLE
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2 µs

TEST MODE

• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<X-BASS> + <CD> + <POWER> TEST:CD operation test

Function: -CD test mode.

-Enter test mode.

C D T E S T

<< >>, << >> buttons make pick's slide possible.

CD-BK260V/CD-BK2700V/CD-BK280V

IL isn't done

<<MEMORY>>
key input

Adjustment result
automatically will
display as below
for each 2 sec :
a) "FOF_XXXX"
b) "TOF_XXXX"
c) "TBA_XXXX"
d) "TGA_XXXX"
f) "FGA_XXXX"
g) "RFL_XXXX"

explanation:
a) Focus off set = "FOF_XXXX"
b) Tracking off set = "TOF_XXXX"
c) Tracking balance = "TBA_XXXX"
d) Tracking gain = "TGA_XXXX"
f) Focus Gain = "FGA_XXXX"
g) RF level shift = "RFL_XXXX"

VOL — Last memory
BAL — CENTER
P.GEQ — FLAT
X-BASS — OFF

To cancel : Power OFF

<<PLAY>> key input.

Do TOC IL. Do normal play
When these following key is input
into PLAY key, track number can
be appoint directly

<< 1>> key: Track 4
<<

2>> key: Track 9
3>> key: Track 15

<<

<<STOP>> key input.

STOP

XX: Hex value

<<MEMORY>> key input.

Laser ON.

<<MEMORY>> key input.

Tracking OFF play at that
specific point.

<<MEMORY>> key input.

Tracking ON play from
that specific point.

Adjustment result auto­matically will display as
below
for each 2 sec :
a) "FOF_XXXX"
b) "TOF_XXXX"
c) "TBA_XXXX"
d) "TGA_XXXX"
f) "FGA_XXXX"
g) "RFL_XXXX"

<<STOP>> key input.

STOP

Sliding the PICKUP with
<< >>, << >> button
must only be in STOP mode.

– 15 –

CD-BK260V/CD-BK2700V/CD-BK280V

Color bar signal
waveform

100 100

88.5
75

70

75

41.5

33.5

5

0

-13.5

-25 -25

100 IRE

(0.714 V)

(1 V)

(0.286 V)

140 IRE

Horizontal
sync signal

40 IRE

40 IRE

Color Burst

20

-20

-40

Blue

Red

Green

Magenta

Cyan

Yellow

Gray

(59.94 Hz)

IH

Standard Specification of Stereo System Error Message Display Contents

Error Contents Display Notes
Output while Device Protection Operation 'PROTECT' 00: While in Protect Circuit Operate

01: Over Current Detection
02: DC Detection
03:

TAPE Mechanism Error 'ER-TA**' 00: Tape Mechanism Error

01: Initial Error
02:
03:

CD/VCD Pickup Mechanism Error 'ER-CD**' 00: Pickup Mechanism Error

01: PU-IN SW Detection NG
02:
03:

CD Changer Mechanism Error 'ER-CD**' 10: Changer Error

11: Initial Error
12:
13:

Tray Error 'ER-CD**' 20: Tray Error

21:
22:
23:

Micon Communication Error 'ER-CD**' 30: System-VCD

31: System-CD Servo
Focus Not Match 'NO DISC'
IL Time Over 'NOT READ'

TUN PLL Unlock 'ER-TU**' 00: TUN Error

01: PLL Unlock

02:

03:

VIDEO CD SECTION

TEST DISC Model No.TVD-581A (NTSC/PAL)

• Checking of video output signal
Checking of color bar

Disc Adjusting Point

Track 2 Video output terminal

Chroma Peak Level

UNIT

Video Output Terminal

Video Input Terminal

TV

Figure 16-1 CHECKING OF VIDEO OUTPUT SIGNAL

Instrument

Connection

105 ± 15 IRE

Figure 16-2

– 16 –

CD-BK260V/CD-BK2700V/CD-BK280V

IRE

100

80

60

40

20

-20

-40

100%

12.5%

0%

NTSC

Waveform on 140 LINE

(This burst level
is 40 IRE)

Gray

Cyan

Yellow

Magenta

Red

Green

Blue

TV monitor

Figure 17-1

Checking of vector sctor scope waveform

Disc Checking Setting

Set the phase of color

Track 2 VIDEO OUT burst signal (B) to

180° -360° line.

Checking

Item

Phase check
±10°

( Check that the setting is within the illustrated range.)

90

170

180

190

160

200

150

210

140

220

130

230

120

103.4

167.1

YE

240

110

250

100

R

240.8

G

260

270

80

MG

-1
123 +180

CY

280

70

+0
33

283.4

290

60

60.8

BL

300

50

347.1

310

40

30

20

10

350

340

330

320

Vector scope waveform of color bar signal

Figure 17-2

360

Gray

Cyan

Yellow

Magenta

Green

TV monitor

Figure 17-3

Checking the black-and-white level

Disc Checking Setting

Track 3 VIDEO OUT 150 line.

Figure 17-4

Red

Blue

Checking

Item

Output level
±10 IRE

140 IRE

TV monitor

Figure 17-5

– 17 –

CD-BK260V/CD-BK2700V/CD-BK280V

NOTES ON SCHEMATIC DIAGRAM

• Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.

• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means pico-farad and the unit of the capacitor
without such a symbol is microfarad. As to electrolytic
capacitor, the expression “capacitance/withstand voltage”
is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type

• Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.

• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas­sis with no signal given.

1. In the tuner section,

indicates AM
indicates FM stereo

2. In the main section, a tape is being played back.

3. In the deck section, a tape is being played back.

( ) indicates the record state.

4. In the power section, a tape is being played back.

5. In the CD section, the CD is stopped.

• Parts marked with “ 1 ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.

REF. NO DESCRIPTION POSITION

SW1 OPEN/CLOSE ON—OFF
SW2 CLAMP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW601 SPAN SELECTOR 9/50 Hz—10/100 Hz
SW701 ON/STAND-BY ON—OFF
SW702 CLOCK ON—OFF
SW703 TIMER/SLEEP ON—OFF
SW704 KARAOKE MODE ON—OFF
SW705 P.B.C ON—OFF
SW706 OSD ON—OFF
SW707 DIGEST ON—OFF
SW712 DISC SKIP ON—OFF
SW713 OPEN/CLOSE ON—OFF
SW714 DIMMER ON—OFF
SW715 X-BASS/DEMO ON—OFF
SW716 EQUALIZER ON—OFF

TYPES OF TRANSISTOR AND LED

REF. NO

SW717 VOLUME UP ON—OFF
SW718 VOLUME DOWN ON—OFF
SW719 REVERSE MODE ON—OFF
SW720 CD ON—OFF
SW721 TAPE ON—OFF
SW722 TUNING DOWN ON—OFF
SW723 MEMORY/SET ON—OFF
SW724 FAST REWIND ON—OFF
SW725 FAST FORWARD ON—OFF
SW726 PLAY ON—OFF
SW727 STOP ON—OFF
SW728 REVERSE PLAY ON—OFF
SW729 REC/PAUSE ON—OFF
SW730 TUNING UP ON—OFF
SW731 VIDEO/AUX ON—OFF
SW732 TUNER (BAND) ON—OFF
SW801 VOLTAGE SELECTOR 110 V—127 V—

DESCRIPTION

POSITION

220 V—230-240 V

FRONT

VIEW

E C B

(S) (G) (D)

(1) (2) (3)

KTA1266 GR
KRC102 M
KRC104 M
KRC102 S
KRC104 S
KTA1271 Y
KTA1274 Y
2SC1845 F

KTA1273 Y
KTC3203 Y
KTC3199 GR
KRA107 M
KRC107 M
KTC3194 Y

3

TOP
VIEW

2

KTA1504 GR
KTC3265 Y
KTC3875 GR

– 18 –

1

FRONT
VIEW

SLR342VCJ1

27MHz

89 79

80

~

86
92

98

8

81
85

93

~~ ~

99

XL1

74 71

37 33 23 90 78 73 66 60 59

XIN

AJN

ARFS

XOUT

No.

ARCLK

EVEN

No.

EVEN

ICM3

ES3889F

VCD COMPANION

No.

ODD

No.

ODD

6

1 25 26 31 41 43 51 56 57 62

CD-BK260V/CD-BK2700V/CD-BK280V

JK702

VIDEO OUT

64
53
32
16

5

100

91
77
75
72
63

CNP1

QM1

M3

T/T UP DOWN

LOADING

SW3

DISC No.

SW2

CLAMP

SW1

POEN/CLOSE

M1

SPINDLE

M2

SLED

SW4

PICKUP IN

55

62
64
65

66
68
79

DSO_C

100

~

LOE#

LROMCE#

LSC1#

80

50 30

ES3880F

VCD PROCESSOR

~

~

8782

ICM3

17,19,21,22 PIN

9188

~~

45 44 43 41 3247

12

~

4

ICM2

28

~

13
81

51
31

ARFS

1

AJN

ARCLK

959493

~

2935

CAM. M+

39
38

CAM. M­CAM. M+

42

CAM. M-

41

25

SPDO
SLDO

17

FD

2
1

TO

~

8142122

SP-

SP+
SL+

SL-

IC3

TR-

M63001FP

TR+

FOCUS/TRACKING/

SPIN/SLED DRIVER

FO-

FO+

19

~

16
10

~

6
5

~

2

20

1

27
26

16
15

ICM1

DRAM

1625635T

B

A

22

~

26
31

~

34
36

~

39
21
35
40

7
6

5
4

17

OE_

CE_

ICM4

EPROM

IX0408AW

24
22
15

~

13
12

~

2
1

~

21

23
25

~

30
32

­6

M

5

+

4
3
2
1

+

6

M

5

-

+

4

M

3

-

2
1

6

6

5

5

4

4

3

3

2

2

1

1

CNP4

6

6
5
4
3
2
1

5
4
3
2
1

CNP3

A

B

18 40 24 23 28

+10 V

CD-GND

A_GND

TO MAIN

SECTION

R-CH

CLAMP SW

CD RES

SECTION

TO DISPLAY

WRG

+5 V

L-CH

GND

CLK

DO

CE

DRF

CNP11

CNP12

DI

1

Q2

2
3
4
5
6

9

Q9

Q10

40
30

CONT2
CONT3

31

CONT4

32

RCHO

41

RVSS

47

LVSS

46

8

LCHO

7
6
5
4
3

53

CONT7

76

CONT6

75

CECLDIDOINT

65 66 67 68 69 70 71 72 52 51

~

CONT5

IC2

LC78636E

SERVO/SIGNAL

CONTROL

WRQ

RES

DEF

2
1

SLDO

SPDO

ADAVDD

XOUT

XL2

16.934MHz

2324252633595735545556

FDO

RFEV

HFL

XVDD
RVDD
LVDD

VDD

VVDD

VDD

XIN

TDO

19

3

16

TE

15

FE

14

7

50
49
44
36
18

5

73

CONSTANT

VOLTAGE

+5 V

+3.3 V

Q4

-5 V

RFEV

22

FE-

21
20

FE

19

TE­TE

18

HFL

17

30 23 11 9

+3.3 V

LASER

DRIVER

IC1

LA9235M

SERVO AMP.

+3.3 V

LDD

PD

TIN2
TIN1
FIN2
FIN1

Q3

TRACKING COIL
FOCUS COIL

8

7

4
3
2
1

+5 V

PICKUP UNIT

Figure 19 BLOCK DIAGRAM (1/3)

– 19 –

CD-BK260V/CD-BK2700V/CD-BK280V

2

L

FM

ANTENNA

SO302

FM ANTENNA

JK1
MIC

VRK1

MIC

VOLUME

M65856SP

MIC AMP.

LATCH

MIC IN

9

12
13

22

+B5

PLAYBACK

REC/

PALYBACK HEAD

AM LOOP

ANTENNA

ICK1

CLK

DATA
LOUT

ROUT

L IN
R IN

VCC

QK1

HEAD

TAPE 1

TAPE 2

TERMINAL

40
41

42
36
35
31
32

23

L-CH
R-CH

L-CH
R-CH

ERASE

HEAD

CNP301

1
2

5

6

2
3

ICK2

KIA4558P

OPE AMP.

REC

P.B.

AC BIAS

FM FRONT END

1

BF301
B.P.F

FM
RF

AM TRACKING

T303 T306

+B4

8

L

7
1

R

FROM CD SECTION

L(T1)
R(T1)
L(T2)
R(T2)

SWITCHING
Q103­Q104

BIAS

OSC

Q105
Q106

L NF
R NF

POP REDUCE

L REC
R REC

REF

SWITCHING

Q111

L103

IC301

TA7358AP

4

2

5

3

L312 T301

7

FM

AM BAND
COVERAGE

IC302

LC72131

PLL(TUNER)

CONSTANT

VOLTAGE

JK690

VIDEO/AUX IN

R

AUX

L

CNP11

1

P.B

24

2

23

3

22

6
9

16
14
12

SWITCHING

Q112
SWITCHING

T1/T2
REC

NOR/
HIGH

15

Q114

H/N

T1/T2

19

Q113

SWITCHING

8

OSC

OSC

Q302

Q109

6

9

FM

+B

FM

CNS601

13

L

4

21

R

5

20

7

18

L NF

8

R NF

17

10

ALC

FM IF

OSC BUFF

CF303T302

450kHz

T351

CF352

AM IF

21

AM MIX

21

AM OSC IN

AM RF IN

4

7

STEREO

FM IF DET.

AM IF MPX.

VT

+B4

Q360

1
2
3

+B4

PB

RECRL

X352

4.5 MHZ

20 22 11

OSC

FM

TUNER

7

TAPE

CD

1615

L

R

L

R

L

R

L

R

FM/AM

9

9
16
10
15
11
14
12
13

MO/ST

10

AUDIO PROCESSOR

IC101
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.

BIAS
Q110

+B3

+B3

MOTOR
DRIVER

Q109

Q707
Q708

SOLENOID

DRIVER

10.7 MHz

CF351

98517

FM

DET

GND

AM IF

FM+B

FM/AM

OUT

MPXIN

1623

18

IC303

LA1832S
FM MPX./

CLK

DO

DI

CE

6

5413

21

IC601

LC75341

LR

18 178

7

TAPE

MECHANISM

ASS'Y

X351

456 kHz

13

VCO

MO/ST
R

FM/AM

12

17

+B4

23

CLK

3

Q107
Q108

MUTING

–B2

14

L

15

1

DI

2

CE

24

R

21

L

4

4

IC561,IC56

KIA4558P

OPE AMP.

–20 dB

ATT

Q601
Q602

+B4

8

IC561
IC562

+B4

REC/P

1
7

Figure 20 BLOCK DIAGRAM (2/3)

– 20 –

CD-BK260V/CD-BK2700V/CD-BK280V

+B4

–20 dB

R

ATT

Q601

L

Q602

REC/PLAY

+B4

8

IC561

4

IC562

1
7

IC561,IC562

KIA4558P

OPE AMP.

28

29

T1/T2

SP. DET.

1

L

15

R

–

Vcc

+Vcc

9

8

(2/2)

IC701

VF1

IX0411AW

CONSTANT VOLTAGE REGULATOR

M12

+B3

VF2

+B4
A+10V

VOLTAGE REGULATOR

–VF

+5V

+B5

KIA7805AP

6 132

Q701-Q703

67
78

80
79
81

–

89

90

–

92
93

-

100

+B5

Q907
Q908

7

10

13

IC901
STK4029S
POWER AMP.

-B1

+B1

IC902

KTC2026

IC903

KIA7810AP

SW5V

IC904

FL701

FL DISPLAY

14

13 44

VLOAD

16

5761 56 545352 515055 49 48

31

23

IC701

32

+B5

IX0411AW(1/2)

SYSTEM

MICROCOMPUTER

VDD

12456 78

RESET

Q902
Q903
Q905

–B2

Q904

L-OUT
R-OUT

D901

D902~D905

RESET

1112 13

1 0 16 1 7 20 2123152224

9

+B5

XL700

4.194304 MHz

Q709

+B5

F901

T4A L 250V

F902

T4A L 250V

F904

T2A L 250V

F903

T2A L 250V

Q901

VOLTAGE

REGULATOR

47

4546

4344 42 40

VDD

AVDD

CEDIDO

–

Q914

PT801

POWER

CLK

RL914

T.F.

VDD

TRANSFORMER

4948

RX701

39

36
35

+B5

34
33

–

31

REMOTE

1

SENSOR

SW701-SW707
SW712-SW732

SECTION

Q906

CD-BK260V/CD-BK2700V: 6 ohms
CD-BK280V: 8 ohms

CD-BK280V ONLY

3

2

TO CD

JK701
HEADPHONES

SW801

VOLTAGE

SELECTOR

230-240 V

220 V
127 V
110 V

KEY

SW601

SPAN

SELECTOR

+B3

+B5

M

MOTOR

SO901
SPEAKER
TERMINAL

SURROUND

SPEAKER

TERMINAL

+B5

M901

FAN

SR1

AC POWER
SUPPLY CORD
AC 110/127/220/
230-240 V, 50/60 Hz

BIAS

Figure 21 BLOCK DIAGRAM (3/3)

– 21 –

CD-BK260V/CD-BK2700V/CD-BK280V

_

T

6

5

5

5

6

/

6

5

5

0

0

5

1
1

220/10

A

MAIN PWB-A1(1/3)

6
5

B

4
3

CNP11

2

P31 12 - D

1

TO CD VIDEO PWB

CNS601

C

D

R-CH

1
2

L-CH

3
4

CD_+B

5
6

BI601

(A_+B) SW_5V

1

CD_+B SW_5V

2

GND

3

L-CH

4

GND

5

R-CH

6

GND

7

M_+12V

8

A+10V

9

GND

10

GND

11

SP_DET

12

P24 1 - F, G

SP_RLY

13

TO POWER SECTION

SW_5V

14

–VP

17

VF2

18

VF1

19

P_IN

20

–15V

21

A_GND

CD_GND

A_+B

+B

+B

+B

+B

+B

-B

R618

R619

330

330

AUDIO PROCESSOR

1

C620

1/50

C606

0.15
C614

1/50

C618

1/50

C624

1/50

2
3
4
5
6
7
8
9

10

11
12

DI
CE

VSS

LOUT
LBASS

LTRE
LIN

LSEL0
L4
L3
L2
L1

C610

R604

1/50

10K

390

R612

R614

R615

3.3K

3.3K

Q601

KTC3199 GR

R613

KTC3199 GR

22K

R620

C635

0.001

390

Q602

C636

0.001

R611

2.2K

C639

R610

1/50

2.2K

R621

C608

R606

0.1

3.9K

C612

0.0027

C616

4.7/50

C622

1/50

R608

1.2K

C626

0.0056

22K

R616

2.2K

Q604

C638

KTC3199 GR

0.001

C637

0.001
R617

2.2K

Q603

KTC3199 GR

C640

22/50

+B

+B

-B -B

R601

1K

R602

1K

LC75341

INTERFACE

–

+

IC601

CCB

–

+

–

+

AUX
DECK
TUNER

C601

220/16

24

CLK

+B

VDD

23

–

+

VREF

+

–

ROUT

+

–

RBASS

RTRE

+

–

RSEL0

+

–

CD

+B

C6
22/

22

C

21
20

C60

0.15

19

RIN

18

C

1/

17

C

4.7

R4

16

C6

1/

R3

15

C6

1/

R2

14

C

1/

R1

13

C623

1/50

E

F

G

TAPE 1

PLAYBACK HEAD

R-CHL-CH

ERASE HEAD

R-CH

L-CH

TAPE 2

RECORD/

PLAYBACK HEAD

Q112~Q114: SWITCHING

R147

10K

R148

4.7K

Q113

KRC104 M

2

213

R111

15K

R101

R102

47K

R107

4.7K

R109

Q106

4.7K

R110

47K

R108

1

1K

1K

C136

0.022

R146

10K

Q112

KTA1266 GR

C101

T1_R

1

1

A_GND

2

2

T1_L

3

3

CNP101

M_GND

1

ERASE

2

1

6
5
4
3
2
1

2
3
4
5
6

CNS102

T2_R2

3

A_GND

4

T2_R1

5

T2_L1

6

T2_L2

7

BI102

560P

C102

560P

C103

180P

C104
180P

Q101

2SC1845 F

R103

2.2K
R105

3.3K

Q103

2SC1845 F

Q104

R106

3.3K

2SC1845 F

R104

2.2K
Q102

2SC1845 F

Q101~Q106: SWITCHING

3

Q114

KRC104 M

Q105

KTC3199 GR

560P

C105

KTC3199 GR

560P

C106

R112B 15K

R149

150

C141

R
C107

330P

L

C108
330P

R114B

100/16

1K

R113B

1K

L

C111

100/25

R117B

C112

100/25

R116B

C113

0.033
100K

C110
330P

C114

0.033

56

+B

R

R137
220K

C150

10/50

R115

56

33K

R121

C115

R123

560P

5.6K

C117
47/25

R119

3.9K

C109
330P

–

+

112K

Hich=T1

112K

+

–

5

321

4

R118B

R120

100K

3.9K
R124

5.6K

C116

C118

560P

47/25

R122

AN7345K

PLAYBACK AND RECORD/

PLAYBACK AMP.

C119

C121

0.022

33K

IC101

R125

0.0022

6

C122

C120

68K

R129

3.3/50

0.0022

R127

R128

6.8K

3.9K

7

6.8K

R126

C123

C124

3.9K

R139

Q107

KTC3199 GR

MUTING

R133

1.5K

R131

270P

C127

C125
22/50

–

+

Hich=CHROME

+

–

8

C126
22/50

R132

270P

C128

1.5K

R130

10K

100

C129

0.022

56K
56K

100

0.022

C130

0.0033

9

0.0033

C131

C132
47/25

R138

R134
10K

10K

KTC3

10K

R135

47/25

C133

NOR/CRO2

ALC

10 11

REC

22/50

1415161718192021222324

ALC

Q

MU

C134

RIPPLE

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 18.

1

23456

Figure 22 SCHEMATIC DIAGRAM (1/13)

– 22 –

+

P34 6 - C

0

0022

3

3/50

68K

TO MIC PWB

CNPK1

1 2 3 4 5 6 7 8 9

A_GND

A_+10V

KOK OUT(R)

KOK OUT(L)

KOK IN(L)

1 2 3 4 5 6 7 8 9

KOK IN(R)

DI

CLK

10

MIC IN

KOK LATCH

10

CD-BK260V/CD-BK2700V/CD-BK280V

CNSK1

BIK1

+B

FM SIGNAL
PLAYBACK SIGNAL

IC601
C75341
PROCESSOR

–

+

CCB

+

TERFACE

–

+

–

–

+

+

–

+

–

AUX
DECK
TUNER

CD

+B +B

R137
220K

Q107

C150

10/50

KTC3199 GR

MUTING

3.9K

R127

1.5K

R131

270P

C123

6.8K

R129

C125
22/50

Hich=CHROME

7

8

C126
22/50

6.8K

R128

.

270P

C124

.

3.9K

R126

1.5K

R130

K

RECORD/
AMP.

VREF

ROUT

RBASS

RTRE

RSEL0

R139

10K

R133

C127

–

+

+

–

R132

C128

0.022

CLK
VDD

RIN

100

0.022

56K
56K

100

R4
R3
R2
R1

C129

C130

24
23
22
21

20
19
18
17
16
15
14
13

0.0033

9

C132
47/25

0.0033

-B

C131

C601

220/16

+B

C603

22/50

C605

0.15

4.7/50

C623
1/50

REC_R

R138

10K

KTC3199 GR

MUTING

10K

R135

47/25

C133

22/50

NOR/CRO2

ALC

ALC

10 11 12

R134
10K

C607

0.1

C613

1/50

C615
C617

1/50

C619

1/50

C621

1/50

Q108

C134

220/10

131415161718

RIPPLE

C135

0.022

VCC

GND

IC101

AN7345K

0.0027

R622
220K

R607

C611

R158

C137

3.9K

220

C609

1/50

R143

R144

0.047

R609

1.2K

C625

0.0056

47K

22K

(ML)

R603

R605

10K

R623
220K

220K

R136

+B

R140

Q109
KTA1266 GR
SWITCHING

82

R142

C138

0.0082
(PP)

C139

0.039(ML)

1K

+B

+B

+B

+B

1

2

3

Q110

KRC104 M

BIAS

R141

47K

4.7K

+B

Q111

BIAS

KTC3203 Y

4.7

R145

C140

47/25

L103

330µH

VIDEO IN SIGNAL
RECORD SIGNAL

CD SIGNAL
MIC SIGNAL

TUN_SM

D_GND

T_BIAS

T_T1/T2

REC/PLAY

SMUTE

SPA_SIG

A_GND

M_+12V

+B

-B
–20dB

M_GND

SW_5V

+B

SP_DET
SP_RLY

TUN_SM

TUN_R

(A_GND)GND

TUN_L

A+10V

+B

(D_GND)GND

R692

C690

390P
C691

390P

33K

R693

33K

DS1SS133

DS1SS133

R690

6.8K

R691

6.8K

–15V

P_IN

DO

CLK

CE
DO

CLK

VF1
–VF
VF2

CE

DI

D690

D691

0.001

DI

C693

CNP701

1
2
3
4
5
6
7
8
9
10

11
12
13
14

15
16
17
18

19
20
21

22
23
24
25
26
27
28
29
30

31
32

SPAN SELECTOR

10 kHz/100 kHz

9 kHz/50 kHz

22
23
24
25
26
27
28
29

30
31

L-CH

R-CH

CHASSIS

FFC701

32

SW601

P27 11 - H

TO TUNER SECTION

JK690

VIDEO/AUX

IN

1

CNS701

P29 12 - C

TO DISPLAY PWB

7

8 9 10 11 12

Figure 23 SCHEMATIC DIAGRAM (2/13)

– 23 –