Sharp CDBP-1250-W, CDBP-1200-W Service manual

0 (0)

CD-BP1200W/1250W

SERVICE MANUAL

No. S6052CDP1200W

	MINI COMPONENT SYSTEM
	MODEL CD-BP1200W
	CD-BP1200W Mini Component System consisting of
	CD-BP1200W (main unit) and CP-BP1200 (speaker system).
Illustration: CD-BP1200W
	MINI COMPONENT SYSTEM
	MODEL CD-BP1250W
	CD-BP1250W Mini Component System consisting of
	CD-BP1250W (main unit), CP-BP1250 (front speaker) and
	GBOXS0043AWM1 (surround speaker).
Illustration: CD-BP1250W
	• In the interests of user-safety the set should be restored to its
	original condition and only parts identical to those specified be
	used.
CONTENTS
	Page
SAFETY PRECAUTION FOR SERVICE MANUAL ...........................................................................................	................ 2
VOLTAGE SELECTION ..............................................................................................................	....................................... 2
SPECIFICATIONS .................................................................................................................	............................................ 3
NAMES OF PARTS .................................................................................................................	.......................................... 4
OPERATION MANUAL ...............................................................................................................	....................................... 6
DISASSEMBLY ....................................................................................................................	.............................................. 8
REMOVING AND REINSTALLING THE MAIN PARTS .......................................................................................	............ 11
ADJUSTMENT .....................................................................................................................	............................................ 12
NOTES ON SCHEMATIC DIAGRAM .....................................................................................................	......................... 14
TYPES OF TRANSISTOR AND LED ................................................................................................................................	14
BLOCK DIAGRAM ..................................................................................................................	......................................... 15
SCHEMATIC DIAGRAM ..............................................................................................................	.................................... 18
VOLTAGE ........................................................................................................................	................................................ 27
WIRING SIDE OF P.W.BOARD .......................................................................................................	................................ 28
WAVEFORMS OF CD CIRCUIT ........................................................................................................	.............................. 34
TROUBLE SHOOTING ...............................................................................................................	..................................... 35
FUNCTION TABLE OF IC...........................................................................................................	..................................... 39
FL DISPLAY .....................................................................................................................	................................................ 45
REPLACEMENT PARTS LIST/EXPLODED VIEW

This document has been published to be used

SHARP CORPORATION– 1 –	for after sales service only.
	for after sales service only.
	The contents are subject to change without notice.

CD-BP1200W/1250W

SAFETY PRECAUTION FOR SERVICE MANUAL

Precaution to be taken when replacing and servicing the Laser Pickup.

The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class 1 Requirements. However, the following precautions must be observed during servicing to protect your eyes against exposure to the Laser beam.

(1)When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position outer than the lead-in position, 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 inside the unit and replacement service parts have already been adjusted prior to shipping.

(3)No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup.

(4)Under no circumstances look directly into the Pickup Lens at any time.

(5)CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result in hazardous radiation exposure.

CAUTION

This Mini Component System is classified as a CLASS 1 LASER product.

The CLASS 1 LASER PRODUCT label is located on the rear cover.

Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

As the laser beam used in this compact disc player is harmful to the eyes, do not attempt to disassemble the cabinet. Refer servicing to qualified personnel only.

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 (110V, 127V, 220V or 230V - 240V AC).

QACCE0007AW00					QACCJ0006AW00

QACCL0002AW00/QACCZ0008AW00

QPLGA0003AWZZ QPLGA0004AWZZ

QACCA0004AW00

Figure 2 AC POWER SUPPLY CORD AND PLUG ADAPTOR

– 2 –

CD-BP1200W/1250W

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

SPECIFICATIONS

CD-BP1200W/1250W

General

Power source:	AC 110/127/220/230-240 V,
	50/60 Hz

Power	32 W
consumption:

Dimensions:	Width; 270 mm (10-5/8")
	Height; 300 mm (11-13/16")
	Depth; 373 mm (14-11/16")

Weight:	5.0 kg (11.0 lbs.)

Amplifier section (CD-BP1200W)

Output power: MPO; 32 W (16 W + 16 W) (10 % T.H.D.)

RMS; 20 W (10 W + 10 W) (10 % T.H.D.)

RMS; 14.6 W (7.3 W + 7.3 W) (0.9 % T.H.D.)

Output terminals: Front speakers; 8 ohms Headphones; 16 - 50 ohms (recommended; 32 ohms)

Amplifier section (CD-BP1250W)

Output power:		MPO; 32 W (16 W + 16 W)
		(10 % T.H.D.)
		RMS; 20 W (10 W + 10 W)
		(10 % T.H.D.)
		RMS; 14.6 W (7.3 W + 7.3 W)
		(0.9 % T.H.D.)

Output terminals:		Front speakers; 8 ohms
		Surround speakers; 16 ohms
		Headphones; 16 - 50 ohms
		(recommended; 32 ohms)

	Compact disc player section
	Compact disc player section

Type:		3-disc multi-play compact disc
		player

Signal readout:		Non-contact, 3-beam semi-con-
		ductor laser pickup

D/A converter:		1-bit D/A converter

Frequency		20 - 20,000 Hz
response:

Dynamic range:		90 dB (1 kHz)

Cassette deck section

Frequency	50 - 14,000 Hz (Normal tape)
response:

Signal/noise ratio:	55 dB (TAPE 1, playback)
	50 dB (TAPE 2, recording/play-
	back)

Wow and flutter:	0.3 % (WRMS)

CP-BP1200/1250

Type:	10 cm (4") full-range speaker

Maximum input	20 W
power:

Rated input power:	10 W

Impedance:	8 ohms

Dimensions:	Width; 220 mm (8-11/16")
	Height; 300 mm (11-13/16")
	Depth; 180 mm (7-1/16")

Weight:	2.0 kg (4.4 lbs.)/each

	GBOXS0043AWM1	CD-BP1250W Only

	Type:	8 cm (3-3/32") full-range speaker

	Maximum input	10 W
	power:

	Rated input power:	5 W

	Impedance:	16 ohms

	Dimensions:	Width; 150 mm (6")
		Height; 150 mm (6")
		Depth; 78 mm (3")

	Weight:	0.4 kg (0.9 lbs.)/each

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

Tuner section

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

– 3 –

CD-BP1200W/1250W

NAMES OF PARTS

CD-BP1200W/1250W

Front panel

1.(CD) Disc Number Indicators

2.Timer Indicator

3.Record Indicator

4.Sleep Indicator

5.Extra Bass Indicator

6.(CD/TUNER) Memory Indicator

7.FM Stereo Mode Indicator

8.FM Stereo Indicator

9.(CD) Repeat Indicator

10.(CD/TAPE) Play Indicator

11.(CD) Pause Indicator

12.(CD) Disc Tray

13.Timer Set Indicator

14.On/Stand-by Button

15.Timer/Sleep Button

16.Clock Button

17.Function Selector Buttons

18.Headphone Socket

19.Equalizer Mode Selector/Extra Bass/ Demo Mode Button

20.Volume Up/Down Buttons

21.Tuning and Time Up/Down Buttons

22.(TAPE 1) Cassette Compartment

23.(TAPE 2) Cassette Compartment

24.(CD) Disc Skip Button

25.(CD) Track Down/Review Button (TUNER) Preset Down Button (TAPE 2) Rewind Button

26.(CD) Track Up/Cue Button (TUNER) Preset Up Button (TAPE 2) Fast Forward Button

27.(CD) Open/Close Button

28.Memory/Set Button

29.(CD/TAPE) Stop Button

30.(TAPE 2) Record Pause Button

31.(CD) Play/Repeat Button (TAPE) Play Button

9 10 11

	14	19
	15	20
	16	20
	16	21
	17	21
	17
	18

22 23

24	25	26	27
28			30
29			31

– 4 –

Rear panel

1.AC Voltage Selector

2.AC Power Input Socket

3.Surround Speaker Terminals (CD-BP1250W Only)

4.Front Speaker Terminals

5.Span Selector Switch

6.FM Aerial Earth Terminal

7.FM 75 Ohms Aerial Terminal

8.AM Loop Aerial Input Socket

CP-BP1200/1250

1.Full-Range Speaker

2.Bass Reflex Duct

3.Speaker Wire

GBOXS0043AWM1 CD-BP1250W Only

1.Full-Range Speaker

2.Speaker Wire

Remote control

1. Remote Control Transmitter LED

CD control section

2.Disc Number Select Buttons

3.Memory Button

4.Pause Button

5.Clear Button

6.Track Down/Review Button

7.Track Up/Cue Button

8.Disc Skip Button

9.Play/Repeat Button

10.Stop Button

11.Random Button

Tuner control section

12. Preset Up/Down Buttons

Tape control section

13.(TAPE 1) Play Button

14.(TAPE 2) Record Pause Button

15.(TAPE 1/2) Stop Button

16.(TAPE 2) Play Button

17.(TAPE 2) Rewind Button

18.(TAPE 2) Fast Forward Button

Common section

19.Equalizer Mode Selector Button

20.Function Selector Buttons

21.On/Stand-by Button

22.Extra Bass Button

23.Volume Up/Down Buttons

	CD-BP1200W/1250W
	3
	4
	5
1	6
2	7
2	8
	1
	2
	3
	1
	2
	1
2	8
3	9
4	10
5	11
6	12
7

13 14 15 1617 18

2123

– 5 –

CD-BP1200W/1250W

OPERATION MANUAL

PREPARATION FOR USE

Connecting the AC power lead

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

Selector adjustment:

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).

To an AC socket

Notes:

Plug the AC power lead into an AC socket, after any connections.

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

Never use a power lead other than the one supplied. Use of a power lead other than the one supplied may cause an electric shock or fire.

AC Plug Adaptor

In areas (or countries) where an AC 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 AC wall socket and AC power plug can be directly connected (see illustration ).

Note for users in Australia and New Zealand:

An AC plug adaptor is not supplied if the lead has an Australian Standard plug.

AM/FM interval (span)

The International Telecommunication Union (ITU) has established that member countries should maintain either a 10 kHz or a 9 kHz interval between broadcasting frequencies of any AM station. The illustration shows the 9 kHz interval zones (regions 1 and 3), and the 10 kHz interval zone (region 2).

Before using the unit, set the SPAN SELECTOR switch (on the rear panel) to AM tuning interval (span) of your area.

To change the tuning zone:

1 Press the ON/STAND-BY button to enter the standby mode.

2 Set the SPAN SELECTOR switch to "50/9" for 9 kHz AM interval (50 kHz FM interval), and "100/10" for 10 kHz AM interval (100 kHz FM interval).

3 Whilst pressing down the / button and the EQUALIZER/X-BASS/DEMO button, hold down the ON/STAND-BY button for at least 1 second.

"CLEAR AL" will appear.

Caution:

The operation explained above will erase all data stored in memory including clock and timer settings, and tuner and CD presets.

– 6 –

– 7 –

SETTING THE CLOCK

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

(Main unit operation)

ON/

STAND-BY

CLOCK

MEMORY/SET

TUNING/TIME ()

1 Press the ON/STAND-BY button to enter the standby mode.

2 Press the CLOCK button.

6 Press the TUNING/TIME ( or ) button to adjust the hour.

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".

7 Press the MEMORY/SET button.

8 Press the TUNING/TIME ( or ) button to adjust the minutes.

PREPARATION FOR USE

Remote control

When inserting or removing the batteries, push them towards the battery terminals.

Installing the batteries incorrectly may cause the unit to malfunction.

2 "AA" size batteries (UM/SUM-3, R6, HP-7 or similar)

RESETTING THE MICROCOMPUTER

Reset the microcomputer under the following conditions:

To erase all of the stored memory contents (clock and timer settings, and tuner and CD presets).

If the display is not correct.

If the operation is not correct.

1 Press the ON/STAND-BY button to enter the standby mode.

2 Whilst pressing down the / button and the EQUALIZER/X-BASS/DEMO button, hold down the ON/STAND-BY button for at least 1 second.

"CLEAR AL" will appear.

ON/

EQUALIZER

STAND-BY

X-BASS/

DEMO

3 Within 5 seconds, press the MEMORY/SET button.

4 Press the TUNING/TIME ( or ) button to select the time display mode.

0:00 AM 0:00 AM 12:00

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

(0:00 - 23:59)

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

(AM 0:00 - PM 11:59)

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

(AM 12:00 - PM 11:59)

Note that this can only be set when the unit is first installed or it has been reset.

5 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 setting will not advance even if minutes advance from "59" to "00".

9 Press the MEMORY/SET button.

The clock starts operating from "0" second. (Seconds are not displayed.) And then the clock display will disappear after a few seconds.

To see the time display:

Press the CLOCK button.

The time display will appear for about 5 seconds.

Note:

The clock display will flash on and off at the push of the CLOCK button when the AC power supply is restored after a power failure occurs or after the AC power lead is disconnected. If this happens, follow the procedure below to change the clock time.

To change the clock time:

1Press the CLOCK button.

2Within 5 seconds, press the MEMORY/SET button.

3Perform steps 6 - 9 above.

To change the time display mode:

1Perform steps 1 - 2 in "RESETTING THE MICROCOMPUTER".

2Perform steps 1 - 9 above.

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

15	15

Precautions for battery use:

Insert the batteries according to the direction indicated in the battery compartment.

Replace all old batteries with new ones at the same time.

Do not mix old and new batteries.

Remove the batteries if they are weak or if the unit will not be used for long periods of time. This will prevent potential damage due to battery leakage.

Caution:

Do not use rechargeable batteries (nickel-cadmium battery, etc.).

Notes concerning use:

Replace the batteries if the operating distance is reduced or if the operation becomes erratic.

Periodically clean the transmitter LED on the remote control and the sensor on the main unit with a soft cloth.

Exposing the sensor on the main unit to strong light may interfere with operation. Change the lighting or the direction of the unit.

Keep the remote control away from moisture, excessive heat, shock, and vibrations.

Caution:

The operation explained above will erase all data stored in memory including clock and timer settings, and tuner and CD presets.

BP1200W/1250W-CD

CD-BP1200W/1250W

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.

CD-BP1200W/1250W

STEP	REMOVAL		PROCEDURE		FIGURE

1	Top Cabinet	1.	Screw .....................	(A1) x4	8-1

2	Side Panel	1.	Screw .....................	(B1) x2	8-1
	(Left/right)	2.	Screw .....................	(B2) x2

3	CD Player Unit/	1.	Turn on the power supply,		8-2
	CD Tray Cover		open the disc tray, take out the
			CD cover, and close. (Note 1)
		2.	Screw .....................	(C1) x1
		3.	Hook .......................	(C2) x3
		4.	Hook .......................	(C3) x2
		5.	Socket ....................	(C4) x2
4	Rear Panel	1.	Screw .....................	(D1) x8	8-2

5	Main/Headphones	1.	Screw ........................	(E1) x8	9-2
	PWB	2.	Socket ....................	(E2) x4
		3.	Flat Cable...............	(E3) x1
		4.	Lug Wire .................	(E4) x1

6	Front Panel	1.	Screw .....................	(F1) x3	9-2

7	Display PWB	1. Screw .....................		(G1) x9	9-3
		2.	Flat Cable...............	(G2) x1

8	Tape Mechanism	1.	Open the cassette holder.		9-3
		2.	Screw......................	(H1) x5

9	Turntable	1.	Hook .......................	(J1) x2	9-4
		2.	Cover .....................	(J2) x1
10	Disc Tray	1.	Turn fully the lock lever in the		8-3
			arrow direction.
		2. While holding the lock lever, rotate			9-1
			the cam gear until the cam gear
			rib engages with the clamp lever.
		3.	Push the slide holder backward to		9-5
			engage the claw with the groove
			and remove it in the direction
			of the arrow. ..............	(K1) x6

11	CD Servo PWB	1.	Screw .....................	(L1) x1	9-6
	(Note 2)	2.	Hook .......................	(L2) x3
		3.	Socket ....................	(L3) x4

12	CD Mechanism	1.	Hook .......................	(M1) x2	10-1
		2.	Hook .......................	(M2) x3

Note 1:

How to open the changer manually. (Fig. 8-3)

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 anti clockwise until the cam gear rib engages with the clamp lever. (Fig. 9-1)

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 to protect the optical pickup from electrostatic damage.

CD-BP1200W/1250W

	(A1)x2	Top Cabinet
	(A1)x2	Front Panel
	ø3x12mm	Front Panel

Side Panel (Right)

		(A1)x2
(B2)x1		ø3x12mm
(B2)x1
ø3x10mm
(B1)x2		Side Panel
ø3x12mm		(Left)
	Rear
	Panel	(B2)x1
	Figure 8-1	ø3x10mm
	Figure 8-1
CD Servo		CD Tray Cover
PWB	(C4)x2	(C2) x3
		(C2) x3
	1
(C3) x1
Pull		1
		2
		CD Player
		Unit
Rear		(C3)x1
Panel		(C3)x1
Panel

(C1)x1	Front Panel
(C1)x1
ø3x12mm

Main PWB

(D1)x8 ø3x8mm

Figure 8-2

Lock Lever

CD Player Unit

(Bottom View)

Figure 8-3

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.

– 8 –

CD-BP1200W/1250W

(J2) x1

Clamp Lever

Turntable

CD Player Unit

(Top View)

Disc Tray

(J1) x2

Cam Gear Rib

Figure 9-1

(E3)x1		(E2)x2	Loading Chassis
(E3)x1

(E2)x1		Front Panel	Figure 9-4
(E2)x1
		Headphones	(K1) x3
(E1)x7		Headphones
(E1)x7		PWB	2
ø3x10mm			2
ø3x10mm			Disc Tray
			Disc Tray
(E2)x1		(E4)x1
(E2)x1
			1
		(E1)x1	(K1) x3
	(F1)x3	(E1)x1
	(F1)x3	ø3x10mm
Main PWB	ø3x8mm		Loading Chassis
	Figure 9-2		Figure 9-5

(G2)x1

Display PWB

Front Panel

(L3) x2	(L1)x1	CD Servo Disc Tray
	ø3x8mm
		PWB

(G1)x9 ø3x10mm

Tape	(L2) x3
Mechanism

(H1)x5	Open
(H1)x5
ø3x10mm
	Cassette
	Holder

(L3) x2

Figure 9-3

Figure 9-6

– 9 –

CD-BP1200W/1250W

CD	(M2) x3
Mechanism

(M1) x1

Disc Tray

Figure 10-1

CP-BP1200/1250

STEP	REMOVAL		PROCEDURE		FIGURE

1	Speaker	1.	Net Frame Ass’y .....	(A1) x1	10-2
		2.	Duct Panel ..............	(A2) x1
		3.	Screw ......................	(A3) x4	10-3

(A1)x1

(A2)x1

	Driver should
	be pried away	(A3)x4
	from Speaker Box.	(A3)x4
	from Speaker Box.	ø3.5x13mm
		ø3.5x13mm

Speaker Box

Screwdriver

Speaker Box

Speaker

Figure 10-2

Figure 10-3

– 10 –

CD-BP1200W/1250W

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. 11-1)

1.Carefully remove the record/playback head and erase head screws (A1) x 2 pcs.

How to remove the playback head (Tape 1) (See Fig. 11-2)

1. Carefully remove the playback head screws (B1) x 2 pcs.

How to remove the pinch roller (Tape 1/2) (See Fig. 11-3)

1.Carefully bend the pinch roller pawl in the direction of the arrow <A>, and remove the pinch roller (C1) x1 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. 11-4)

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

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

TAPE 2

Record/Playback

Head

Erase Head

(A1)x2 Ø2 x 9mm

Figure 11-1

TAPE 1

Playback

Head

(B1)x1

Ø2x9mm

(B1)x1 Ø2x5mm

Figure 11-2

How to remove the belt (Tape 1) (See Fig. 11-4)

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. 11-5)

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

		Pinch
TAPE 2		Roller
TAPE 2	Pinch Roller	Pawl

(C1)x1	Pull <A>
	Pull

<B>

		Figure 11-3
Motor
			Motor
TAPE 2	FF/REW	Motor		TAPE 1
TAPE 2	FF/REW			TAPE 1
	Belt		TAPE 2	Main Belt
	(D2)x1		TAPE 2	(E1)x1
	(D2)x1		Main Belt	(E1)x1
			Main Belt
			(D1)x1
(F1) x2
Ø 2.6 x 5mm
	(D1)x1			TAPE 1
	(D1)x1
	Main Belt			FF/REW
		(E1)x1		Belt
		(E1)x1		(E2)x1
		Main Belt		(E2)x1
		Main Belt
Figure 11-5		Figure 11-4

– 11 –

CD-BP1200W/1250W

CD MECHANISM SECTION

Perform steps 1, 2, 3, 9 and 12 of the disassembly method to remove the CD mechanism.

How to remove the loading motor	T/T Up/Down Motor
(See Fig. 12-1)
1. Bend the hooks (A1) x 5 pcs., to remove the T/T Up/Down	Disc Tray
motor.	(A1)x3
2. Remove the drive belt (A2) x 1 pc.	(A1)x2

Pulley Motor

Drive Belt (A2) x1

Figure 12-1

How to remove the pickup (See Fig. 12-2)

1.Remove the screws (B1) x 2 pcs., to remove the shaft (B2).

2.Remove the stop washer (B3) x 1 pc., to remove the gear (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 to protect the optical pickup from electrostatic damage.

	(B1) x2	Stop Washer
		(B3) x1
	ø2.6 x6mm

Pickup

	Shaft	CD Mechanism
	Shaft	Gear
	(B2) x1	Gear
	(B2) x1	(B4) x1
		(B4) x1
		Figure 12-2

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	Specified Value

	Tape 1	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

∙ Tape Speed

	Test Tape	Adjusting	Specified	Instrument
		Point	Value	Connection

Normal	MTT-111	Variable	3,000±30 Hz	Speaker
speed		Resistor in		terminal
		motor.		(Load
				resistance:
				6 ohms)

TAPE MECHANISM

Motor

Variable Resistor in motor

Figure 12-3

– 12 –

TUNER SECTION

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

∙ AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage	Frequency	Frequency	Setting/	Instrument
		Display	Adjusting	Connection
			Parts

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

CD-BP1200W/1250W

∙ FM RF

Signal generator: 400Hz, 22.5 kHz dev., FM modulated

Test Stage	Frequency		Frequency	Setting/	Instrument
			Display	Adjusting	Connection
				Point

FM Band	—		87.50 MHz	T301(fL):	*1
Coverage				3.4 V ± 0.1V

FM RF	98.00 MHz		98.00 MHz	L312	*2
	(10-30 dB)

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

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

	CNP302
SO302	AM LOOP
SO302	ANTENNA	MAIN PWB
FM TERMINAL		MAIN PWB
	1	T303	AM
	IC301		AM
	IC301		TRACKING fL
			TRACKING fL
		L312
TP301	T302		T306
			T306
R381	FM IF	FM RF
FM BAND	T301	AM BAND
		AM BAND
		COVERAGE fL
COVERAGE fL		COVERAGE fL
COVERAGE fL	T351
	T351
	AM IF
		TP302
			R357

Figure 13-1 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 PWB and pickup 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. 13-2 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

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 Low → High not functioning
0103	Open/Close SW High → Low not functioning

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

	[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 Low → High not functioning
0308	Clamp SW High → Low not functioning

	Stopped	T					1999/04/05	20:26:47
	Stopped						1999/04/05	20:26:47
	CH1=500mV		CH2=200mV		CH3=1V			500ms/div
	CH1=500mV		DC	10:1	DC 10:1			(500ms/div)
	DC	10:1			DC 10:1			(500ms/div)
	DC	10:1						NORM:20kS/s
T	FDO
	FDO
1
3	TE
3
	EFBL
2
								CH2
								v/DIV
								200mV
	=Filter=		=Offset=		=Record Length=		=Trigger=
Smoothing : ON			CH1 :	0.000V	Main :	100K	Mode : SINGLE
BW	: FULL		CH2 :	0.000V	Zoom :	2k	Type : EDGE CH1
			CH3 :	0.00V			Delay :	0.0ns
			CH4 :	0.00V			Hold off :	0.2 s
				Figure 13-2

– 13 –

CD-BP1200W/1250W

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 micro-micro-farad and the unit of the capacitor without such a symbol is micro farad. 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 Multi meter 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 “ ” ( ) 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	50/9kHz-100/10kHz

SW701	ON/STAND-BY	ON—OFF

SW702	CLOCK	ON—OFF

SW703	TIMER/SLEEP	ON—OFF

SW709	DISC SKIP	ON—OFF

SW710	OPEN/CLOSE	ON—OFF

SW711	EQUALIZER/X-BASS/DEMO	ON—OFF

SW712	VOLUME UP	ON—OFF
SW713	VOLUME DOWN	ON—OFF

REF. NO	DESCRIPTION	POSITION

SW714	CD	ON—OFF

SW715	TAPE	ON—OFF

SW716	TUNING /TIME DOWN	ON—OFF

SW717	MEMORY/SET	ON—OFF

SW718	REWIND	ON—OFF

SW719	FAST FORWARD	ON—OFF

SW720	PLAY/REPEAT	ON—OFF

SW721	STOP	ON—OFF

SW723	REC/PAUSE	ON—OFF

SW724	TUNING/TIME UP	ON—OFF

SW725	TUNER (BAND)	ON—OFF

SW801	VOLTAGE SELECTOR	110V/120V/220V/
		230-240V

FRONT

VIEW FRONT VIEW

E C B

(S)(G) (D)

(1)(2) (3)

2SC1845 F

2SC3331 4204SRT7 KTA1266 GR

KTA1271 Y

KTA1273 Y

KTC3203 Y

KRC102 M

KRC104 M

KRC107 M

Figure 14 TYPES OF TRANSISTOR AND LED

– 14 –

CD-BP1200W/1250W

TO MAIN SECTION	TO DISPLAY SECTION
(TO IC601)

		SW2		SW3
		SW2		DISC
SW1	CLAMP NUMBER
OPEN/
CLOSE						M3
				M		T/T
				M		UP/DOWN
				+		-MOTOR
1	2	3	4	5	6	BI4

						CH-R	AGND	CH-L	DGND	+5V(+B3)				CDINT	WRQ	DRF	CE	DO	DI	CLK	RESCD	CLAMPSW	GND							1	2	3		4	5	6	CNS4
																														1	2	3		4	5	6
						1	2	3	4	5		CNP11		1	2	3	4	5	6	7	8	9	10	CNP12						1	2	3		4	5	6	CNP4
						1	2	3	4	5				1	2	3	4	5	6	7	8	9	10							1	2	3		4	5	6
												Q2
		75		76			45	46	47	48		32	31	30
66	CL	CONT6		CONT7			LCHO	LVSS	RVSS	RCHO		CONT4	CONT3	CONT2	64
65	CE														74
															74
67	DI														40
68	DO														19
69	INT							IC2							13
	WRQ							IC2							3			SW4
70							LC78641E								3			SW4
70							LC78641E										PICKUP IN
71	RES					SERVO/SIGNAL								CONT5 33
72	DEF						CONTROL							SLD0	26
														SLD0	26
52	XOUT													SPD0	25
			VVDD ADAVDD		VDD	LVDD	RVDD	XVDD		HFL	RFEV		FE	SPD0	25
XL1	VDD5V		VVDD ADAVDD		VDD	LVDD	RVDD	XVDD		HFL	RFEV		FE	TE	24
														FD0	24
51	XIN													TD0	23
16.9344MHz	73	5		18	36	44	49	50		7	14		15	16
	73	5		18	36	44	49	50		7	14		15	16
	+5V				+3.3V
CONSTANT																									1	2		17	25	41	42	38	39
VOLTAGE
Q1							17	18	19	20		21	22																							35
Q1							17	18	19	20		21	22
							HFL	TE	TE-	FE		FE-	RFEV											18	VCC1					IC3						29
+3.3V		30																						40	VCC4					IC3						22
																								40	VCC4				M63001FP							22
																													M63001FP							21
							IC1																+5V	24	VCC2		FOCUS/TRACKING/									21
		23					IC1																+5V	24	VCC2		FOCUS/TRACKING/
		23					LA9235M																	23			SPIN/SLED DRIVER									14
																																				14
		11				SERVO AMP.									LASER									28	VCC3											8
															DRIVER																					8
															DRIVER
		9		FIN1	FIN2	TIN1	TIN2		PD	LDD						Q3		+3.3V								4	5	6		7	15	16	26	27
				FIN1	FIN2	TIN1	TIN2		PD	LDD

				1	2	3	4		7	8
+5V
																							M2	M
																						SLED
																						MOTOR
															COIL	COIL						MOTOR		M
															COIL	COIL						SPINDLE		M
																						M1
															FOCUS	TRACKING						MOTOR
PICKUP UNIT															FOCUS	TRACKING
PICKUP UNIT

Figure 15 BLOCK DIAGRAM (1/3)

– 15 –

CD-BP1200W/1250W

FM ANTENNA

+B2

TERMINAL

SO302

10.7mHz

IC301

T302

1 CF303

CF351

1 BF301

TA7358AP

450kHz

X351

FM FRONT END

T351

CF352

456kHz

FM OSC

17 13

L312

T301

AM MIX

AM IF

FM+B FM

MO/ST

IC303

GND

DET VCO

L 14

LA1832S

R15

FM IFDET/

FM/AM

FM MPX. /AM IF

OUT MPX IN

FM/AM

AM LOOP

OSCAMIN

RFAMIN

OUTOSCAM

STEREO

ANTENNA

FM OSC

Q302

CNP302

T303

T306

AM BAND

TRACKING

COVERAGE

X352

4.5MHZ

22 16

CLK

IC302

VDD 17

LC72131

PLL(TUNER)

FM/AM MO/ST

FM +B

SWITCHING

Q360

+B2

CE 2

TAPE

L 10

CLK 24

SYSTEM

IC601

MUTE

CNS602

21 R

Q601

LC75341

Q602

TUNER

L 11

AUDIO PROCESSOR

4 L

FROM CD

R 14

SECTION

L 12

CNP11

R13

IC101

7 8 1718

AN7345K

PLAYBACK AND RECORD/

PLAYBACK AMP.

PLAYBACK

L(T1)

+B2

MUTING

Q110

REC/PLAY

HEAD

L-CH

R(T1)

P.B

TAPE 1

R-CH

Q111

4 L

SWITCHING

L(T2)

21 R

REC

R(T2)

PLAYBACK

P.B.

Q104~

HEAD

L-CH

L NF

TAPE 2

Q107

R-CH

R NF

POP

6 T1/T2

H/N

REDUCE

L REC

AC BIAS

L REC

9 REC

R REC 16

8 L NF

REF 14

17 R NF

12 NOR/

10 ALC

HIGH

T1/T2

SWITCHING

Q108

Q103

Q109

Q101

Q102

SWITCHING

BIAS

SWITCHING

ERASE	BIAS	Q114	Q112	Q113	BAIS
	OSC	L104
			L103

HEAD

Figure 16 BLOCK DIAGRAM (2/3)

– 16 –

CD-BP1200W/1250W

R. PLAY

F. PLAY

+B2

SW601

FL701

T2 PLAY

SPAN SELECTOR

FL DISPLAY

T1 PLAY

Q702

SOLENOID

MOTOR

TAPE

4 ~10

11 ~30

31 32 33

Q703

DRIVER

MOTOR

Q706

Q705

Q704

LED722

+B4

60 5957 5655 54 5352 5150 49 48 4746 45 44 4342 4140

VDD

RX701 3

+B4

IC701

SYS. STOP

IX0337AW

+B4

AVDD

SYSTEM

MICROCOMPUTER

KEY

SW701-SW703

SW709-SW721

SW723-SW725

Q701

RESET

100 VDD

VDD

DI DO

1 4

7 ~ 9 10 111213 15 16 17 ~20 2122 2324

+B4

TO CD

XL701

SECTION

4.1943MHz

Q707

IC704

+B4

JK901

KIA704ZAP 2

SP. DET.

Q901

HEADPHONES

Q902

RESET

IC901

7 R-OUT

R 5 LA4282

SO902

L 2 POWER AMP.

11 L-OUT

SPEAKER

Vcc

TERMINAL

SYSTEM

MUTE

Q601

FRONT

Q602

SPEAKER

+B1

F901

PT801

POWER TRANSFORMER

T2.5A L 250V

SURROUND

SPEAKER

D907-D910

CD-BP1250W ONLY

REC/PLAY

SW801

VOLTAGE SELECTOR

220V

SO902

F902

230-240V

KTC2026

D911-D914

AC INPUT

T1.6A L 250V

A10V

SILICON

127V

SOCKET

+B2

IC905

110V

IC902

AC POWER

SUPPLY CORD

KIA7810AP

AC 110V/127/220/

VOLTAGE

230-240V, 50/60Hz

REGULATOR

+B4

+5V

IC904

KIA7805AP

TF801

CONSTANT

VOLTAGE REGULATOR

BAIS

Figure 17 BLOCK DIAGRAM (3/3)

– 17 –

Sharp CDBP-1250-W, CDBP-1200-W Service manual

CD-BP1200W/1250W

				CNS1B
		Vcc	7	7
		Vref	6	6
		E	6	6
B		E	5	5
		A	5	5
		A	4	4
		B	4	4
		B	3	3
		F	3	3
		F	2	2
			2	2
		C	1	1
			1	1
C
D
E
		TR-	1	1
	TR+		1	1
	TR+	TR+	2	2
		TR+

	FO+	FO+	3	3
			3	3
		FO-	4	4
			4	4
		GND	5	5
	FO-		5	5
	FO-		6	6
F	TR-	PD	6	6
	TR-		7	7
		VR	7	7
	ACTUATOR	LD	8	8
	ACTUATOR	LD
	PICKUP UNIT			CNS2B
	PICKUP UNIT

CD MOTOR PWB-C			CNS3B
	CNP3A		CNS3B
M1	+	6	6
SPINDLE	M	6	6
SPINDLE
MOTOR		5	5
	-	5	5
M2	+	4	4
SLED	M	3	3
MOTOR	-	3	3
SW4		2	2
SW4
PICKUP IN		1	1

CD SERVO PWB-B

CNS1A

R50

TIN1

R51

68K

FIN1

R52

68K

C23

R53

68K

FIN2

0.047

TIN2

R54

68K

IC1

R56

R55

LA9235M

C11

C24

68K

SERVO AMP.

0.47/6.3

2.2/50

FIN1

VCC

C25 0.1

CNP1

C19 100/10

C22

C12

REF

ODRV

100P

29 RFSW

0.1

FIN2

REF

R42

C18

R10

R80

REF

120K

AGCON

6.8K

27K

TIN1

28 RF-

(CH)

C54

C55

C20

REF

39K

27K

0.1

47/10

0.01

TIN2

REF

27 RF

R15

REF

330

10K

100/10

C13

REF1

C17

0.01

C26 0.047

10/16

VREF

REF

0.0047

C42

24 BH

C14

68P

0.1

ODRV

0.33

LDD

APC

22 RFEV

PH/BH

GND

REF

FE-

LPF

100K

LDON 10

REF

20 FE

C53

C51

ODRV

LPF

19 TE-

0.001

47/10

AGON 12

AGCON

10K

R25

REF

EFBL

HFL

C82

C28

2.7V

10K

REF

0.022

47/10

R47

TEST0 14

LPF

REF

TEST

1.5V

3.3

C41

TES1

REF

100/10

Q3 3.3V

KTA1266GR

LASER DRIVER

D93

R43

EFBL

DS1SS133

220K

C52

0.01

TDO

LD_M+

TR-

FDO

LD_M-

VCC4

TR+

C46

FO+

0.022

FO+

LOADING M+

LOADING M-

FO-

GND

TR+

TR-

M63001FP FOCUS/TRACKING/ SPIN/SLED DRIVER

C47

100/16

CNS2A

CNP2

IC3

GND 11

32 GND

SL-

28 VCC3

SL+

27 SP-

SLDO

SP+

VCC1 18

25 SPO SPDO

STANDBY

24 VCC2(SPN)

R48

6.8K

Vref

MUTE

CNS3A

100/16

C50

C49

100/16

SP-

SP+

SL+

SL-

PUIN

GND(D)

CNP3

• NOTES ON SCHEMATIC DIAGRAM can be found on page 14.

Figure 18 SCHEMATIC DIAGRAM (1/9)

– 18 –

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