Sharp CD-BA2600, CP-BA2600, CP-BA250 Service Manual

– 1 –

CD-BA250/CD-BA2600

No. S1105CDBA250/

CONTENTS

Page

IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)....................................................................................................... 2

SPECIFICATIONS ............................................................................................................................................................. 2

NAMES OF PARTS ........................................................................................................................................................... 3

OPERATION MANUAL ...................................................................................................................................................... 5

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

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

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

BLOCK DIAGRAM ........................................................................................................................................................... 17

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................20

VOLTAGE ........................................................................................................................................................................ 36

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 37

TYPES OF TRANSISTOR AND LED................................................................................................................................37

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 38

TROUBLESHOOTING ..................................................................................................................................................... 39

FUNCTION TABLE OF IC................................................................................................................................................ 43

FL DISPLAY......................................................................................................................................................................49

REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (FOR U.S.A. ONLY)

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

SERVICE MANUAL

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

SHARP CORPORATION

MINI COMPONENT SYSTEM

MODEL CD-BA250

CD-BA250 Mini Component System consisting of
CD-BA250 (main unit) and CP-BA250 (speaker system).

MINI COMPONENT SYSTEM

MODEL CD-BA2600

CD-BA2600 Mini Component System consisting of
CD-BA2600 (main unit) and CP-BA2600 (speaker system).

CD-BA250/CD-BA2600

– 2 –

General

Amplifier

CD player

Tuner

Cassette deck

Power source

AC 120 V, 60 Hz

Power consumption

128 W

Dimensions

Width: 10-5/8" (270 mm)
Height: 13" (330 mm)
Depth: 13-7/16" (340 mm)

Weight

13.8 lbs. (6.3 kg)

Output power

75 watts minimum RMS per channel into 6 ohms from
60 Hz to 20 kHz, 10% total harmonic distortion

Output terminals

Speakers: 6 ohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)

Input terminals

Video/Auxiliary (audio signal): 500 mV/47 kohms

Type

3-disc multi-play compact disc player

Signal readout

Non-contact, 3-beam semiconductor laser pickup

D/A converter

1-bit D/A converter

Frequency response

20 - 20,000 Hz

Dynamic range

90 dB (1 kHz)

Frequency range

FM: 87.5 - 108 MHz
AM: 530 - 1,720 kHz

Frequency response

50 - 14,000 Hz (Normal tape)

Signal/noise ratio

55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/playback)

Wow and flutter

0.3 % (WRMS)

Type

2-way type speaker system
2" (5 cm) Tweeter
5-1/4" (13 cm) Woofer

Maximum input power

150 W

Rated input power

75 W

Impedance

6 ohms

Dimensions

Width: 8-11/16" (220 mm)
Height: 13" (330 mm)
Depth: 8-9/16" (217 mm)

Weight

6.6 lbs. (3.0 kg)/each

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

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

SPECIFICATIONS

CD-BA250/CD-BA2600

CP-BA250/CP-BA2600

IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)

BEFORE RETURNING THE AUDIO PRODUCT

(Fire & Shock Hazard)
Before returning the audio product to the user, perform the
following safety checks.

1. Inspect all lead dress to make certain that leads are not
pinched or that hardware is not lodged between the chassis
and other metal parts in the audio product.

2. Inspect all protective devices such as insulating materials,

cabinet, terminal board, adjustment and compartment covers
or shields, mechanical insulators etc.

3. To be sure that no shock hazard exists, check for leakage

current in the following manner.
* Plug the AC line cord directly into a 120 volt AC outlet.
* Using two clip leads, connect a 1.5k ohm, 10 watt resistor

paralleled by a 0.15µF capacitor in series with all exposed
metal cabinet parts and a known earth ground, such as
conduit or electrical ground connected to earth ground.

* Use a VTVM or VOM with 1000 ohm per volt, or higher,

sensitivity to measure the AC voltage drop across the
resistor (See diagram).

* Connect the resistor connection to all exposed metal parts

having a return path to the chassis (antenna, metal cabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.

All check must be repeated with the AC line cord plug connection
reversed.
Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

TEST PROBE

0.15 µ F

1.5k ohms
10W

VTVM

AC SCALE

– 3 –

CD-BA250/CD-BA2600

NAMES OF PARTS

CD-BA250/CD-BA2600

Front panel

1. Disc Tray

2. Timer Set Indicator

3. Power On/Stand-by Button

4. Tape 2 Cassette Compartment

5. Tape 1 Cassette Compartment

6. Equalizer Mode Select Button

7. Volume Up or Down Buttons

8. Extra Bass/Demo Mode Button

9. Disc Tray Open/Close Button

10. Disc Skip Button

11. Tuning and Time Up Button

12. CD or Tape Stop Button

13. CD Button

14. Tuner (Band) Button

15. Tape (1 2) Button

16. Video/Auxiliary Button

17. Dimmer Button

18. Clock Button

19. Timer/Sleep Button

20. Headphone Jack

21. CD Play or Repeat, Tape Play Button

22. CD Track Up or Fast Forward, Tape 2
Fast Forward, Tuner Preset Up Button

23. Tuning and Time Down Button

24. Memory/Set Button

25. Tape 2 Record Pause Button

26.CD Track Down or Fast Reverse, Tape 2
Rewind, Tuner Preset Down Button

17

21

4
5

161514131211

23 24 25 26

22

18
19

20

67

1
2

3

8

9
10

Display

1. Extra Bass Indicator

2. FM Stereo Mode Indicator

3. FM Stereo Receiving Indicator

4. CD Repeat Play Indicator

5. CD Pause Indicator

6. CD Play Indicator

7. Disc Number Indicators

8. Timer Play Indicator

9. Timer Recording Indicator

10. Tape 2 Record Indicator

11. Memory Indicator

12. Tape Play Indicator

13. Sleep Indicator

14. Spectrum Analyzer/Volume Level Indicator

1
2

345 10

14

14 14

1112 136

7
8

9

CD-BA250/CD-BA2600

– 4 –

CD-BA250/CD-BA2600

Rear panel

1. FM/AM Loop Antenna Jack

2. Video/Auxiliary (Audio Signal) Input Jacks

3. Speaker Terminals

4. AC Power Cord

1
2

3

4

Remote control

1. Remote Control Transmitter

2. Disc Number Select Buttons

3. CD Pause Button

4. CD Memory Button

5. CD Track Down or Fast Reverse Button

6. CD Clear Button

7. Tape 1 Play Button

8. Tape 1/Tape 2 Stop Button

9. Equalizer Mode Select Button

10. Tape 2 Record Pause Button

11. CD Button

12. Tuner (Band) Button

13. Power On/Stand-by Button

14. Extra Bass Button

15. CD Stop Button

16. CD Play or Repeat Button

17. CD Track Up or Fast Forward Button

18. CD Random Button

19. Tuner Preset Up/Down Buttons

20. Tape 2 Play Button

21. Tape 2 Rewind Button

22. Tape 2 Fast Forward Button

23. Video/Auxiliary Button

24. Tape (1

2) Button

25. Volume Up or Down Buttons

1

2

15
16

17
18
19
20

21

24

3

6

4

7

8
9

10

14

13

12

11

5

25

22
23

✱

✱

✱

✱

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.

– 5 –

CD-BA250/CD-BA2600

OPERATION MANUAL

CP-BA250/CP-BA2600

Setting the Clock

In this example, the clock is set for the 12-hour (AM 12:00) display.

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 12-hour or 24-hour display) will be skipped.

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

1

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

2

Press the CLOCK button and within 5 seconds, press the MEMO­RY/SET button.

3

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

"AM 12:00" The 12-hour display will appear.
(AM 12:00 - PM 11:59)
"AM 0:00" The 12-hour display will appear.
(AM 0:00 - PM 11:59)
"0:00" The 24-hour display will appear.
(0:00 - 23:59)
Note that this can only be set when the unit is first installed or it has been reset.

(Refer to step 3 under "If trouble occurs".)

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.
Holdit 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.

1 Clear all theprogrammed contents. [Perform to step 3 under "If trouble occurs"]
2 Perform "Setting the Clock" from the beginning.

Speaker system

1. Tweeter

2. Woofer

3. Bass Reflex Duct

4. Speaker Wire

3

4

1

2
3

CD-BA250/CD-BA2600

– 6 –

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 autho­rized SHARP dealer or service center.

General

CD player

Tuner

Cassette deck

Remote control

Condensation

Symptom Possible cause

The clock is not on time. Did a power failure occur? Reset the clock.
When a button is pressed, the unit

does not respond.

Set this unit to the power stand-by mode and
then turn it back on.

If the unit still malfunctions, reset it. (Refer to
step 3 under "If trouble occurs")

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

Are the headphones connected?
Are the speaker wires disconnected?

Symptom Possible cause

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

performed properly.

Does the disc satisfy the standards?
Is the disc distorted or scratched?

Playback sounds are skipped, or
stopped in the middle of a track.

Is the unit located near excessive vibrations?
Is the disc very dirty?
Has condensation formed inside the unit?

Symptom Possible cause

Radio makes unusual noise con­secutively.

Is the unit placed near the TV or computer?
Is the FM/AM loop antenna placed properly?

Move the AC power cord away from the an­tenna if located near.

Symptom Possible cause

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

sound quality.

Is it a normal tape? (You cannot record on a

metal or CrO tape.)
Cannot erase completely.
Sound skipping. Is there any slack?

Is the tape stretched?
Cannot hear treble. Are the capstans, pinch rollers, or heads

dirty?
Sound fluctuation.

Cannot remove the tape. If a power failure occurs during playback, the

heads remain engaged with the tape. Do not

open the compartment forcibly. Wait until

electricity resumes.

Symptom Possible cause

The remote control does not oper­ate.

Is the AC power cord 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?

Sudden temperature changes, storage or operation
in an extremely humid environment may cause con­densation inside the cabinet (CD pickup, tape
heads, etc.) or on the transmitter on the remote con­trol.
Condensation can cause the unit to malfunction. If
this happens, leave the power on with no disc (or
cassette) in the unit until normal playback is possible
(about 1 hour). Wipe off any condensation on the
transmitter with a soft cloth before operating the unit.

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:

Caution:

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

Before transporting the unit

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

the power on.

3 If neither step 1 nor 2 restores the unit, do the following:

Press the ON/STAND-BY button to enter the power stand-by mode.
While pressing down the / button and the X-BASS/DEMO button, press
the ON/STAND-BY button until "CLEAR AL" appears.

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

Remove all CDs inserted in 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 cord from the AC outlet.

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.

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

Remote sensor

– 7 –

CD-BA250/CD-BA2600

Accessories

Accesorios

FM/AM loop antenna × 1

Antena de cuadro de FM/AM

×

1

Remote control × 1

Controlador remoto

×

1

1

1

1

2

3

Battery Installation of the Remote Control

Instalación de las pilas del controlador remoto

Use 2 “AA” size batteries (UM/SUM-3, R6, HP-7 or similar). Batteries are not included.

Use dos pilas del tamaño “AA” (UM/SUM-3, R6, HP-7 o equivalentes). Las pilas no están incluidas.

Remove the

Insert the batteries

Replace the cover.

battery cover.

as shown.

Extraiga la cubierta Inserte las pilas Vuelva a colocar la

de las pilas. como se muestra. cubierta.

1

2

System Connections

Conexiones del sistema

3

3

AM loop antenna

Antena de cuadro de AM

FM antenna

Antena de FM

Red

Rojo

Black

Negro

Right speaker

Altavoz derecho

Left speaker

Altavoz izquierdo

AC outlet

(AC 120 V, 60 Hz)

A un tomacorriente de

CA (120 V de CA, 60 Hz)

Right speaker

Altavoz derecho

Left speaker

Altavoz izquierdo

RCA cord

(not supplied)

Cable RCA

(no suministrado)

To the line

output jack

A la toma de

salida de línea

VCR

Videograbadora

TV

TV

CD-BA250/CD-BA2600

– 8 –

Turning on Your System

Conexión de la alimentación de su sistema

4

4

The first time the unit is plugged,

the unit will enter the demonstra-

tion mode. You will see words

scroll.

Cuando se enchufe por primera vez

el aparato, se establecerá en el

modo de demostración. Verá un

desplazamiento de palabras.

1

2

Press the

X-BASS/DEMO

button to cancel

the demonstration

mode.

Pulse el botón

X-BASS/DEMO para

cancelar el modo de

demostración.

Press the ON/

STAND-BY button to

turn the power on.

Pulse el botón ON/

STAND-BY

para

conectar la

alimentación.

Listening to a CD (CDs)

Audición de un disco CD (discos CD)

1

Press the CD button.

Pulse el botón CD.

2

Press the OPEN/CLOSE button to

open the disc tray.

Pulse el botón OPEN/CLOSE para abrir

la bandeja de discos.

3

Place the CD(s) on the disc tray, label

side up.

When loading a third disc, press the

DISC SKIP button to turn the disc tray,

then place the CD in the open position.

Coloque el disco compacto en la bandeja

de discos, con el lado de la etiqueta hacia

arriba.

Cuando ponga un tercer disco, pulse el

botón DISC SKIP para girar la bandeja de

discos, y coloque el disco compacto en la

posición abierta.

4

Press the OPEN/CLOSE button to

close the disc tray.

Pulse el botón OPEN/CLOSE para cerrar

la bandeja de discos.

5

To select the CD you want to listen to

first, press one of 1 - 3 buttons on

the remote control.

Para seleccionar el disco CD que desee

escuchar primero, pulse uno de los botones

1 - 3 del controlador remoto.

6

Press the button to start playback.

Pulse el botón para iniciar la

reproducción.

5” (12 cm)

12 cm

3” (8 cm)

8 cm

Listening to a Cassette Tape (TAPE 1 or TAPE 2)

Audición de una cinta de cassette (TAPE 1 o TAPE 2)

Listening to the Radio

Audición de la radio

FM stereo mode indicator

Indicador del modo de FM en estéreo

FM stereo receiving indicator

Indicador de recepción de FM en estéreo

1

Open the cassette door by pushing the

area marked “ PUSH EJECT”.

Abra la puerta del cassette pulsando la

parte marcada “ PUSH EJECT”.

2

Load a cassette into the TAPE 1 or T APE

2 cassette compartment with the side to

be played facing toward you.

Cargue un cassette en el compartimiento

de cassette de TAPE 1 o de T APE 2 con la

cara a reproducirse encarada hacia usted.

3

Press the TAPE (1 2) button to select

the cassette you want to listen to.

Pulse el botón TAPE (1 2) para

seleccìonar el cassette que desee

escuchar.

4

Press the button to start playback.

Pulse el botón para iniciar la

reproducción.

1

Press the TUNER (BAND) button repeat-

edly to select the desired frequency

band (FM or AM).

Pulse repetidamente el botón TUNER

(BAND) para seleccionar la banda de

frecuencia deseada (FM o AM).

2

Press the TUNING/TIME ( or ) but-

ton to tune in to the desired station.

When the TUNING/TIME button is

pressed for more than 0.5 seconds, scan-

ning will start automatically and the tuner

will stop at the first receivable broadcast

station.

Pulse el botón TUNING/TIME ( o ) para

sintonizar la emisora deseada.

Cuando se pulse el botón

TUNING/TIME

durante más de 0,5 segundos, la

exploración se iniciará automáticamente y

el sintonizador se parará en la primera

emisora difusora que pueda recibirse.

To receive an FM stereo transmission:

Press the TUNER (BAND) button to display the

“ST” indicator.

● “ ” will appear when an FM broadcast is in ste-

reo.

Para recibir una transmisión de FM en estéreo:

Pulse el botón TUNER (BAND) para que se encienda

el indicador “ST”.

●

“ ” aparecerá cuando una difusión de FM sea en

estéreo.

TAPE 1

TAPE 2

– 9 –

CD-BA250/CD-BA2600

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

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

(Left/Right)

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

CD Tray Cover open the disc tray, take out

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

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

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

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

5. Socket .................... (C4) x2

4 Rear Panel with 1. Screw ..................... (D1) x9 9-2

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

5 Main PWB 1. Screw ..................... (E1) x3 9-2

2. Socket .................... (E2) x3 10-2

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

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

6 Front Panel 1. Screw ..................... (F1) x2 10-2

7 Display PWB 1. Screw..................... (G1)

x11

10-3

2. Flat Cable .............. (G2) x1

8 Tape Mechanism 1. Open the cassette holder. 10-3

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

9

Headphones PWB

1. Screw ..................... (J1) x1 10-3

10 Turntable 1. Hook....................... (K1) x2 10-4

2. Cover ..................... (K2) x1

11 Disc Tray 1.

Turn fully the lock lever in the

9-3

arrow direction

.

2.

While holding the lock lever,rotate

10-1
the cam gear until the cam gear
rib engages with the clamp lever.

3.

Push the slide holder backward to

10-5
engage the claw with the groove
and remove it in the direction

of the arrow. ...............

(L1) x6

12 CD Servo PWB 1. Screw ..................... (M1) x1 10-6

(Note 2) 2. Hook....................... (M2) x2

3. Socket .................... (M3) x4

13 CD Mechanism 1. Hook....................... (N1) x2 11-1

2. Hook....................... (N2) x3

14

Loading Motor PWB

1. Hook....................... (P1) x5 11-1

DISASSEMBLY

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.

Figure 9-2

Figure9-3

CD-BA250/CD-BA2600

STEP

REMOVAL

PROCEDURE

FIGURE

Figure 9-1

CD-BA250/CD-BA2600

Note 1: How to open the changer manually. (Fig. 9-3)

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.

(Fig. 10-1)

3. After that, push forward the CD slide holder.

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.

Lock Lever

CD Player Unit
(Bottom View)

(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

(E1)x1
ø3x10mm

(C3)x1

(D1)x2
ø3x10mm

(D2)x1

CD Player
Unit

CD Tray Cover

Pull

(C3) x1

(C4)x2

(C2) x3

1

1

2

CD Servo
PWB

(C1)x1
ø3x10mm

(D1)x7
ø3x10mm

Rear
Panel

Main PWB

Lug Wire

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-BA250/CD-BA2600

– 10 –

Figure 10-1

Figure 10-2

Figure 10-3

Figure 10-4

Figure 10-5

Figure 10-6

Clamp Lever

CD Player Unit
(Top View)

Cam Gear Rib

Turntable

Slide
Chassis

(K2)x1

CD Player Unit

(K1)x2

1

3

2

(L1)x3

(L1)x3

Main PWB

Headphones
PWB

Power­transformer
PWB

Power PWB

(E2)x2

(E4)x1

(E3)x1

(E2)x1

(F1)x2

ø3x8mm

(E1)x2

ø3x10mm

(G2)x1

(G1)x11
ø3x10mm

(H1)x5
ø3x10mm

Display PWB

Headphones
PWB

Open

Cassette
Holder

Tape
Mechanism

(J1)x1
ø3x10mm

(M3)x2

(M2)x2

(M3)x2

CD Video

PWB

Slide
Chassis

(M1)x1
ø3x8mm

– 11 –

CD-BA250/CD-BA2600

1 Front Panel 1. Net......................... (A1) x1 11-2

2 Woofer 1. Screw .................... (B1) x4 11-3

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

STEP

REMOVAL PROCEDURE

FIGURE

Figure 11-2

Figure 11-1

CP-BA250/CP-BA2600

Figure 11-3

(N2)x3

(N1)x1

(P1)x5

(N1)x1

Loading
Motor
PWB

CD
Mechanism

(A1)x1

Screwdriver

Driver should
be pried away
from Speaker Box.

Front Panel

Speaker Boox

(B1)x4

ø4x12mm

Woofer

(C1)x2

ø3x10mm

Tweeter

CD-BA250/CD-BA2600

– 12 –

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.

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.

Figure 12-1

Figure 12-2

Figure 12-3

Figure 12-4Figure 12-5

(A1)x2
Ø2 x 9mm

TAPE 2

Record/Playback
Head

Erase Head

(B1)x2
Ø2 x 9mm

TAPE 1

Playback
Head

Pinch Roller
(C1)x1

<A>

<B>

Pinch
Roller
Pawl

Pull

TAPE 2

TAPE 1
Main Belt
(E1)x1

TAPE 2
Main Belt
(D1)x1

TAPE 1

Main Belt
(D1)x1

FF/REW
Belt
(D2)x1

FF/REW
Belt
(E2)x1

Motor

Motor

(F1) x2

Ø 2.6 x 5mm

Motor

– 13 –

CD-BA250/CD-BA2600

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

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

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

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.

Figure 13-2

CD MECHANISM SECTION

Perform steps 1, 2, 3, 10,11,12 and 13 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.

Figure 13-1

ADJUSTMENT

MECHANISM SECTION

• Driving Force Check

Torque Meter Specified Value

Play: TW-2111 Tape 1: Over 80 g

Tape 2: Over 80 g

• Torque Check

Torque Meter

Tape 2

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

Specified Value

Tape 1

Specified

Value

Adjusting

Point

Instrument

Connection

Test Tape

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

motor. (Load

resistance:
6 ohms)

• Tape Speed

Figure 13-3

(A1)x2

(A1)x1

Loading Motor

CD Player
Chassis

(A1)x2

Pulley

Drive Belt
(A2) x1

Loading
Motor

(B1) x2
ø2.6 x6mm

Shaft
(B2) x1

Stop Washer
(B3) x1

Gear
(B4) x1

CD Mechanism

Pickup

TAPE MECHANISM

Tape
Motor

Variable Resistor in motor

CD-BA250/CD-BA2600

– 14 –

Test Stage

Frequency Frequency

Display

Setting/

Adjusting

Parts

Instrument

Connection

CD SECTION

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

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

TUNER SECTION

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

AM IF 450 kHz 1,720 kHz T351 *1
AM Band — 530 kHz (fL): T306 *2

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

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

• FM RF

Signal generator: 1 kHz, 75 kHz dev., FM modulated

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

FM RF 98.00 MHz 98.00 MHz L312 *2

(10-30 dB)

Test Stage

Instrument

Connection

Frequency Frequency

Display

Setting/

Adjusting

Point

Figure 14-1 ADJUSTMENT POINTS

Figure 14-2

CD ERROR CODE DESCRIPTION

Error

State Code

[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)

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

• 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.

IC301

AM IF

FM IF

FM RF

T303

T306

T302

L312

AM
TRACKING fL

AM BAND
COVERAGE fL

T301

T351
FM BAND
COVERAGE fL

MAIN PWB

CNP301

FM/AM LOOP

ANTENNA

TP302

R357

R316

TP301

T

T

EFBL

FDO

TE

Stopped

CH1=500mV

DC 10:1

CH2=200mV

DC 10:1

CH3=1V

DC 10:1

500ms/div

(500ms/div)

NORM:20kS/s

1

2

3

=Record Length=

Smoothing : ON CH1 : 0.000V

CH2 : 0.000V

Main : 100K
Zoom : 2k

Mode : SINGLE
Type : EDGE CH1
Delay : 0.0ns
Hold off : 0.2µs

CH3 : 0.00V
CH4 : 0.00V

BW : FULL

=Trigger==Filter= =Offset=

CH2
v/DIV
200mV

1999/04/05 20:26:47

– 15 –

CD-BA250/CD-BA2600

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

OPEN/CLOSE operation is using manual.

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

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

<<PLAY>> key input.

<<MEMORY>> key input.

<< 1>> key: Track 4
<< 2>> key: Track 9
<< 3>> key: Track 15

<<STOP>> key input.

STOP

Laser ON.

<<MEMORY>> key input.

Tracking OFF play at that
specific point.

<<MEMORY>> key input.

Tracking ON play from
that specific point.

<<STOP>> key input.

STOP

IL isn't done

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

To cancel : Power OFF

Sliding the PICKUP with
<<

>>, << >> button

must only be in STOP mode.

<<MEMORY>>
key input

Adjustment result
automatically will
display as below
for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"

explanation:
a) Focus off set ="FOFF_XX"
b) Tracking off set ="TOFF_XX"
c) Tracking balance ="TBAL_XX"
d) Tracking gain ="TGAN_XX"
f) Focus Gain ="FGAN_XX"
g) RF level shift ="RFLS_XX"

Adjustment result auto­matically will display as
below
for each 2 sec :
a) "FOFF_XX"
b) "TOFF_XX"
c) "TBAL_XX"
d) "TGAN_XX"
f) "FGAN_XX"
g) "RFLS_XX"

XX: Hex value

CD-BA250/CD-BA2600

– 16 –

Standard Specification of Stereo System Error MessageDisplay 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:
04:

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

11: Initial Error
12:
13:

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

21:
22:

23:
Focus Not Match 'NO DISC'
IL Time Over 'NOT READ'

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

01: PLL Unlock

02:

03:

– 17 –

CD-BA250/CD-BA2600

Figure 17 BLOCK DIAGRAM (1/3)

+5V

CNS4

BI4

CNP4

M3

T/T UP DOWN

LOADING

+3.3V

TO DISPLAY SECTION

TO MAIN SECTION

CONSTANT

VOLTAGE

Q2

LASER

DRIVER

+3.3V

Q1

+5V

PICK UP UNIT

IC1

LC78645E

CD SERVO

VVDD

LDD

LDS

M

SW3

DISC

NUMBER

SW2

CLAMP

SW1
OPEN/
CLOSE

CNP8

CNP7

TRACKING COIL

FOCUS COIL

SW1

PICK UP

IN

M2

SLED

MOTOR

M1

SPINDLE

MOTOR

M

M

R-CH

Q3

XVDD

RVDD

LVDD

ADAVDD

RFVDD

XL1

33.8688MHz

OC. DISC NO

CLAMP SW

CD RES

CLK

DI

DO

CE

DRF

WRQ

+5V

+5V

DGND

L-CH

AGND

VCC3

VCC2

VCC4

VCC1

IC2

M63001FP

FOCUS/TRACKING/

SPIN/SLED

DRIVER

XIN

XOUT

RES

WRQ

DO

DI

CLK

CE

TIN2

TIN1

FIN2

FIN1

TD0

FD0

SPDO

SLDO

CONT5

CONT2

CONT3

CONT4

RCHO

RVSS

LVSS

LCHO

80

42

79

75

20

5

40

18

24

23

14

8

21

22

29

35

41

47

46

7

10

987

15

12

17 25

42

41 8339

4765

168226 27

316452

316452

316452

54

71

61
62
63

69
57
56
55
51
50

40

37

19

28

26

23
22
21

3271689

615432

4543 44 25 70

64
65
66

48

49

18

CD-BA250/CD-BA2600

– 18 –

Figure 18 BLOCK DIAGRAM (2/3)

IC101
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.

AUX

R

L

R

L

JK690

VIDEO/AUX IN

FM

+B

+B4

CLK

+B4

AM IF

OSC BUFF

AM

FM IF

FM

OSC

B.P.F

CNP301

BI601

ATT

–20dB

Q103­Q104

–B2

+B4

IC561,IC562

KIA4558P

OPE AMP.

IC562

IC561

Q107
Q108

Q601
Q602

10.7MHz

450kHz

FM

REC/PL

A

CLK

CE

DI

DO

DI

CE

MO/ST

SWITCHING

+B4

FM/AM

IC302

LC72131

PLL(TUNER)

FM/AM

OUT

L

R

T

MUTING

P.B.

REC

AC BIAS

L

L

R

R

R

L

TAPE

TUNER

CD

PB

CNP7

FROM CD SECTION

HEAD

ERASE

SWITCHING

SWITCHING

SWITCHING

BIAS

Q113

Q114

Q112

Q110

SWITCHING
Q109

OSC

BIAS

Q111

L103

Q105
Q106

REC PB HEAD

TAPE 2

PB HEAD

TAPE 1

R-CH

L-CH

R-CH

L-CH

IC601

LC75341

AUDIO PROCESSOR

+B4

R

L

REC

R

L

L NF
R NF

ALC

REF

R REC

L REC

POP REDUCE

R NF

L NF

SWITCHING

L(T2)
R(T2)

R(T1)

L(T1)

R

L

FM/AM

MPXIN

STEREO

AM RF IN

AM OSC IN

FM

Q360

VT

OSC

X352

4.5MHZ

AM BAND
COVERAGE

AM TRACKING

T303 T306

Q302

X351

456kHz

MO/ST

VCO

FM

DET

FM+B

GND

AM IF

CF351

IC303

LA1832S

FM IF DET.

FM MPX./

AM IF MPX.

AM MIX

CF352

T351

RF

FM

OSC

FM

L312 T301

CF303T302

IC301

TA7358AP

FM FRONT END

BF301

21

7

8

4

1

22

3

4

24

2

1

81817

3

9

10

18

11

16

3

15

10

9

7

23

14
12
13

1
2

20

19

7

18

10

8

17

13

21

4

5

2

24

23

6
9

16
14
12

15

1

5413

8

4

3

2

1

21

7

98517

6

21

21

20 22 11

17

1615

9

6

5

7

13

14

12

15

1623

4

7

H/N

P.B

REC

T1/T2

T1/T2

NOR/
HIGH

– 19 –

CD-BA250/CD-BA2600

Figure 19 BLOCK DIAGRAM (3/3)

Q914

KTC2026

KIA7810AP

VOLTAGE REGULATOR

Q907
Q908

AC120V/60Hz

–VF

VF2

VF1

Q901

+B5

+5V

UN-SW5V

KIA7805AP

CONSTANT VOLTAGE REGULATOR

IC904

+B4

+B3

+B1

-B1

–B2

+B5

+B3

+B5

-

13 44

+B4

–

16

–

Q701-Q703

R

L

T

dB

+B5

RX701

REMOTE
SENSOR

+B4

1,IC562
4558P

E AMP.

IC701

IX0399AW

(2/2)

562

561

D902~D905

D901

RL914

JK701
HEADPHONES

M901

FAN

MOTOR

M

Q906

Q709

Q902
Q903
Q905
Q904

Q601
Q602

IC903

IC902

IC901
STK4029S
POWER AMP.

A+10V

M12

F903

2A/125V

F904

2A/125V

F902

4A/125V

F901

4A/125V

+Vcc

–Vcc

R-OUT

L-OUT

CLK

SO901
SPEAKER
TERMINAL

AC POWER

SUPPLY CORD

31

REC/PLAY

VLOAD

RESET

+B5

+B5

+B5

+B5

VDD

VDD

VDD

SP. DET.

–

CEDIDO

XL700

4.194304MHz

–

BIAS

T1/T2

AVDD

SW701-SW703
SW712-SW718
SW720-SW727
SW729-SW732

KEY

TO CD

SECTION

IC701

IX0399AW(1/2)

SYSTEM

MICROCOMPUTER

FL701

FL DISPLAY

23

89

81

32

80

4948

47

93

14

92

90

12456 78

15

1

29

28

9

78

67

6 132

3

2

1

7

8

1

13

7

8

10

100

33
31

4546

1112 13

9

1 0 16 1 7 20 21232224

79

5756 54 5352515055 4948

4344 42 40

39

36
35
34

T.F.

PT801

POWER

TRANSFORMER

CD-BA250/CD-BA2600

– 20 –

Figure 20 SCHEMATIC DIAGRAM (1/9)

A

B

C

D

E

F

G

H

1

23456

• NOTES ON SCHEMATIC DIAGRAM can be found on page 37.

CD SIGNAL

CD MOTOR PWB-F

CD SERVO PWB-C

4

1

9

101112131415161718192021

22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

8

7

6

5

432

9

1

0

1

1

1

2

1

3

1

4

1

5

1

6

1

7

1

8

1

9

2

0

8

7

6

5

4

3

2

1

TP3

TP2

TP1

L

VCC4

M–

M+

VCC3

SPO

VCC2

SLDO

VCC

STANDBY

VREF

MUTE

FD

SP–

SL–

SL+

SP+

TR–

TR+

FO+

FO–

GND

GND

GND

FO–

FO–

LD

VR

PD

FO+

TR+

TR–

C

F

B

A

E

GND

PUIN

SL+
SL–

SP–

SP+

VREF

VCC

PICKUP UNIT

TR–

TR–
TR+

TR+

FO+

FO+

FO–

PD
VR

LD

F

C

B

A

E

VCC

VREF

SLIDE

SPIN

+

+
–

–

PU-IN

1
2
3
4
5
6

1
2
3
4
5
6

5

3

6

2

7

1

4

5

3

6

2

7

1

4

5

3

6

2

7

1

4

5

3

6

2

7

1

4

4

1

3

6
5

2

4

1

3

6
5

2

M

M

4

8

5

2

1

7

3

6

4

8

5

2

1

7

3

6

4

8

5

2

1

7

3

6

4

8

5

2

1

7

3

6

++–

–

+

–

+

+

–

–

+

–

+

–

+

–

2

CNP1

CNS1A

CNS1B

R6

33K

R5

12K

R4

12K

R3

33K

R1

12K

R2

12K

C1

47/25

C2

0.01

CNP2

CNS2A

CNS2B

C38

0.01

C39

100/10

R44

12K

C41
100/10

CNP3

CNS3A

CNS3B

R13

1K

R14

C12

100P

C11

0.22/50

C10

10/50

C9

100/10

C50
22P

(CH)

R12
330

C7

100P

R10
27K

C5

0.047(ML)

R11

10K

R9

3.3

Q1

KTA1266 GR

C4

0.001

C49

47/25

C3

47/25

C8

0.0047

C6

0.1

IC2

M63001FP
FOCUS/TRACKING/
SPIN/SLED DRIVER

C40

220/6.3

R7
47

M1

SPINDLE

MOTOR

M2

SLED

MOTOR

SW4

PICKUP IN