Sharp CDDP-2500-H Service manual

CD-DP2500H

SERVICE MANUAL

No. S4035CDP2500H

CD-DP2500H

CD-DP2500H Mini Component System consisting of CD­DP2500H (main unit), CP-DP2500H (front speakers),
GBOXS0038AWM1 (centre speaker) and GBOXS0039AWM1
(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.

• Note for users in UK
Recording and playback of any material may require consent which SHARP
is unable to give. Please refer particularly to the provisions of Copyright Act
1956, the Dramatic and Musical Prefomers Protection Act 1956, the

Manufactured under license from Dolby Laboratories Licens­ing Corporation.
DOLBY, the double-D symbol and "PRO LOGIC" are
trademarks of Dolby Laboratories Licensing Corporation.

Preformers Protection Acts 1963 and 1972 and to any subsequent statutory
enactments and orders.

CONTENTS

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

IMPORTANT SERVICE NOTES (FOR U.K. ONLY) .......................................................................................................... 3

SPECIFICATIONS ............................................................................................................................................................. 4

NAMES OF PARTS ........................................................................................................................................................... 5

WIRING OF PRIMARILY SUPPLY LEADS (FOR U.K. ONLY).......................................................................................... 7

OPERATION MANUAL ...................................................................................................................................................... 8

DISASSEMBLY................................................................................................................................................................ 11

REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 14

ADJUSTMENT ................................................................................................................................................................. 15

TEST MODE .................................................................................................................................................................... 18

RDS OPERATION ........................................................................................................................................................... 18

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 22

BLOCK DIAGRAM ........................................................................................................................................................... 23

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................26

VOLTAGE ........................................................................................................................................................................ 46

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 47

TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 48

FUNCTION TABLE OF IC................................................................................................................................................ 52

FL DISPLAY......................................................................................................................................................................58

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

Page

SHARP CORPORATION

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

CD-DP2500H

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 I 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.

(FOR U.K.)

(FOR EUROPE)

Laser Diode Properties

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

VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN
TÄSSÄ
KÄYTTÖOHJEESSA MAINITULLA TAVALLA SAATTAA
ALTISTAA KÄYTTÄJÄN TURVALLISUUSLUOKAN 1
YLITTÄVÄLLE NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.

VARNING - OM APP ARA TEN ANVÄNDS PÅ ANNA T SÄTT
ÄN I DENNA BRUKSANVISNING SPECIFICERAS. KAN
ANVÄNDAREN UTSÄTTAS FÖR OSYNLIG
LASERSTRÅLNING, SOM ÖVERSKRIDER GRÄNSEN
FÖR LASERKLASS 1.

– 2 –

(FOR AUSTRALIA/NEW ZEALAND)

CD-DP2500H

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

IMPORTANT SERVICE NOTES (FOR U.K. ONLY)

Before returning the unit to the customer after completion of a
repair or adjustment it is necessary for the following withstand
voltage test to be applied to ensure the unit is safe for the
customer to use.
Setting of Withstanding Voltage Tester and set.

Set name
Withstanding Voltage Tester
Test voltage

Set time
Set current (Cutoff current)
Unit
Judgment
OK: The “GOOD” lamp lights.
NG: The “NG” lamp lights and the buzzor sounds.

Set value

4,240 VPEAK
3,000 VRMS
6 secs
4 mA

WITHSTANDING

VOLTAGE TESTER

AC

OUT

SHORT-CIRCUIT
AC POWER
SUPPLY CORD

Screw

Figure 3

PROBE

UNIT

CONNECT THE PROBE
TO GND OF CHASSIS
SCREW

– 3 –

CD-DP2500H

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

● General

Power source: AC 230-240 V, 50 Hz
Power consumption: 155 W
Dimensions: Width; 270 mm (10-5/8")

Height; 330 mm (13")
Depth; 332 mm (13-1/16")

Weight: 8.2 kg (18.0 lbs.)

● Amplifier section

Output power: PMPO; 600 W (Total)
(For EUROPE) Front speakers;

MPO; 200 W (100 W + 100 W)
(DIN 45 324)
RMS; 120 W (60 W + 60 W)
(DIN 45 324)
RMS; 96 W (48 W + 48 W)
(DIN 45 500)

Centre speaker;

MPO; 50 W (DIN 45 324)
RMS; 30 W (DIN 45 324)
RMS; 24 W (DIN 45 500)

Surround speakers;

MPO; 50 W (25 W + 25 W)
(DIN 45 324)
RMS; 30 W (15 W + 15 W)
(DIN 45 324)
RMS; 24 W (12 W + 12 W)
(DIN 45 500)

Output power: Front speakers;
(For U.K.) RMS; 120 W (60 W + 60 W)

(10 % T.H.D.)
RMS; 96 W (48 W + 48 W)
(0.9 % T .H.D.)

Centre speaker;

RMS; 30 W (10 % T.H.D.)
RMS; 24 W (0.9 % T.H.D.)

Surround speakers;

RMS; 30 W (15 W + 15 W)
(10 % T.H.D.)
RMS; 24 W (12 W + 12 W)
(0.9 % T.H.D.)

Output power: Front speakers;
(For AUSTRALIA/ MPO; 200 W (100 W + 100 W)
NEW ZEALAND) (10 % T.H.D.)

RMS; 120 W (60 W + 60 W)
(10 % T.H.D.)
RMS; 96 W (48 W + 48 W)
(0.9 % T .H.D.)

Centre speaker;

MPO; 50 W (10 % T.H.D.)
RMS; 30 W (10 % T.H.D.)
RMS; 24 W (0.9 % T.H.D.)

Surround speakers;

MPO; 50 W (25 W + 25 W)
(10 % T.H.D.)
RMS; 30 W (15 W + 15 W)
(10 % T.H.D.)
RMS; 24 W (12 W + 12 W)
(0.9 % T.H.D.)

SPECIFICATIONS

Output terminals: Front speakers; 6 ohms

Centre speaker; 6 ohms
Surround speakers; 12 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
CD digital output (optical)

Input terminals: Video/Auxiliary (audio signal) × 2;

500 mV/47 kohms

● Compact disc player section

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)

● Tuner section

Frequency range: FM; 87.5-108 MHz

AM; 522-1,620 kHz

● Cassette deck section

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: 0.35 % (DIN 45 511)
(For EUROPE)
Wow and flutter: 0.3 % (WRMS)
(For U.K./
AUSTRALIA/
NEW ZEALAND)

● Front speaker section

Type: 3-way type [13 cm (5-1/4") woofer,

5 cm (2") tweeter and super tweeter]

Maximum input
power: 120 W
Rated input power: 60 W
Impedance: 6 ohms
Dimensions: Width; 240 mm (9-1/2")

Height; 330 mm (13")
Depth; 255 mm (10-1/16")

Weight: 3.9 kg (8.5 lbs.)/each

● Centre speaker section

Type: 10 cm (4") full-range speaker
Maximum input
power: 60 W
Rated input power: 30 W
Impedance: 6 ohms
Dimensions: Width; 260 mm (10-1/4")

Height; 140 mm (5-1/2")
Depth; 155 mm (6-1/8")

Weight: 0.9 kg (2.0 lbs.)

● Surround speaker section

Type: 10 cm (4") full-range speaker
Maximum input
power: 30 W
Rated input power: 15 W
Impedance: 12 ohms
Dimensions: Width; 200 mm (7-7/8")

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

Weight: 0.5 kg (1.1 lbs.)/each

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

– 4 –

Front panel

1. (CD) Disc Tray

2. (CD) Disc Skip Button

3. (CD) Disc Number Select Buttons

4. (CD) Open/Close Button

5. Extra Bass Indicator

6. Spectrum Analyzer/Volume Level Indicator

7. (CD) Disc Number Indicators

8. (CD/TUNER) Memory Indicator

9. (TAPE 2) Record Indicator

10. (CD) Play Indicator

11. (CD) Music Schedule Indicators

12. (CD) More Tracks Indicator

13. (CD) Pause Indicator

14. (TAPE) Play Indicator

15. (CD) Repeat Indicator

16. Dynamic PTY Indicator

17. Programme Type Indicator

18. Traffic Information Indicator

19. EON Indicator

20. Traffic Programme Indicator

21. Sleep Indicator

22. RDS Indicator

23. FM Stereo Mode Indicator

24. Traffic Announcement Indicator

25. FM Stereo Indicator

26. Timer Record Indicator

27. Timer Play Indicator

CD-DP2500H

NAMES OF PARTS

28. On/Stand-by Button

29. Clock Button

30. Timer/Sleep Button

31. Dimmer Button

32. Phantom Button

33. Normal Button

34. Bypass Button

35. (TUNER) Programme Type/Traffic Information
Search Button

36. (TUNER) EON Button

37. (TUNER) ASPM Button

38. (TUNER) Display Mode Selector Button

39. (TUNER) Station Selector Button

40. Volume Control

41. Extra Bass/Demo Mode Button

42. Equalizer Mode Selector Button

43. Headphone Socket

44. Function Selector Buttons

45. Tuning and Time Up/Down Buttons

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

47. Memory/Set Button

48. (CD/TAPE) Stop Button

49. Timer Set Indicator

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

51. (TAPE 2) Record Pause Button

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

53. (TAPE 1) Cassette Compartment

54. (TAPE 2) Cassette Compartment

– 5 –

CD-DP2500H

Rear panel

1. AC Power Lead

2. CD Digital Output Socket

3. FM 75 Ohms Aerial Socket

4. AM Loop Aerial Socket

5. Video/Auxiliary (Audio Signal) Input Sockets

6. Front Speaker Terminals

7. Centre Speaker Terminals

8. Surround Speaker Terminals

Front speaker

1. Super Tweeter

2. Tweeter

3. Woofer

4. Bass Reflex Ducts

5. Speaker Wire

Centre speaker

1. Full-Range Speaker

2. Speaker Wire

Surround speaker

1. Full-Range Speaker

2. Speaker Wire

– 6 –

Remote control

1. Remote Control Transmitter LED

2. Surround Level Buttons

3. Centre Level Buttons

4. Dolby Pro Logic Surround Mode Button

5. Test Tone Button

6. Balance Control Buttons

● Tuner control section

7. Preset Up/Down Buttons

● CD control section

8. Memory Button

9. Pause Button

10. Stop Button

11. Play/Repeat Button

12. Clear Button

13. Track Down/Review Button

14. Random Button

15. Track Up/Cue Button

16. Disc Skip Button

● Tape control section

17. (TAPE 1) Play Button

18. (TAPE 1/2) Stop Button

19. (TAPE 2) Record Pause Button

20. (TAPE 2) Rewind Button

21. (TAPE 2) Play Button

22. (TAPE 2) Fast Forward Button

CD-DP2500H

WIRING OF PRIMARILY SUPPLY LEADS (FOR U.K. ONLY)

If any one of the bands shoen in Fig.7 is removed for some
reason,be sure replace it to the original position and same
appearance as before.

● Common section

23. Equalizer Mode Button

24. Function Selector Buttons

25. On/Stand-by Button

26. Extra Bass Button

27. Volume Up/Down Buttons

Nylon Band 80mm
92LNBAND1318A

Brown

Power
Transformer

Blue

AC Power
Supply Cord

– 7 –

Figure 7

CD-DP2500H

SETTING THE CLOCK

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

1

Press the ON/STAND-BY button to enter the stand-by mode.

2

Press the CLOCK button.

3

Within 5 seconds, press the MEMORY/SET button.4Press the TUNING/TIME (

or

) button to select the time

display mode.

“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 in-

stalled or it has been reset.

5

Press the MEMORY/SET button.

6

Press the TUNING/TIME (

or ) button to adjust the hour.

● Press the TUNING/TIME (

or

) button once to ad-

vance the time by 1 hour. Hold it down to advance con-

tinuously.

● 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 min-

utes.

● Press the TUNING/TIME (

or ) button once to ad-

vance 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 sec-

onds.

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 discon-

nected.

If this happens, follow the procedure below to change the

clock time.

To change the clock time:

1 Press the CLOCK button.

2

Within 5 seconds, press the MEMORY/SET button.

3 Perform steps 6 - 9 above.

To change the time display mode:

1 Perform steps 1 - 2 in the section “RESETTING THE MI-

CROCOMPUTER”.

2

Perform steps 1 - 9 above.

(Main unit operation)

RESETTING THE MICROCOMPUTER

Reset the microcomputer under the following con-

ditions:

● 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 stand-by mode.

2

Whilst pressing down the

/ button and the X-BASS

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.

OPERATION MANUAL

– 8 –

CD-DP2500H

●

– 9 –

CD-DP2500H

●

●

●

●

●

– 10 –

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 be
removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.

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

CD-DP2500H

STEP

10 Display PWB/ 1. Screw .....................

11

12 Turntable 1. Hook....................... (M1) x2 13-1

13 Disc Tray 1.

14 CD Servo PWB 1. Screw ..................... (P1) x1 13-3

15 CD Mechanism 1. Hook ....................... (Q1) x2 13-5

16

REMOVAL PROCEDURE FIGURE

1 Top Cabinet 1. Screw ..................... (A1) x4 11-1

2 Side Panel 1. Screw ..................... (B1) x8 11-1

(Left/right)

3 CD Player Unit/ 1. Turn on the power supply, 11-2

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) x3

4 Rear Panel 1. Screw ..................... (D1) x10 11-2

5 Main PWB 1. Screw ..................... (E1) x3 11-2

6

Power Supply PWB

7 Front Panel 1. Screw ..................... (G1) x2 12-3

8

Volume Move Unit

9 Volme PWB/ 1. Nut.......................... (J1) x1 12-5

Motor PWB 2. Belt. ........................ (J2) x1

Switch PWB/
Headphones PWB

Tape Mechanism

(Note 2) 2. Hook....................... (P2) x2

Loading Motor PWB

2. Socket .................... (E2) x3 12-3

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

4. Lug Wire................. (E4) x1

1. Screw ..................... (F1) x2 12-3

2. Socket .................... (F2) x5

3. Flat Wire................. (F3) x1 12-4

1. Knob....................... (H1) x1 12-4

2. Screw ..................... (H2) x4

3. Socket .................... (H3) x1

3. Screw .....................

2. Flat Cable .............. (K2) x1

1. Open the cassette holder 12-4

2. Screw ..................... (L1) x5

2. Cover ..................... (M2) x1

Turn fully the lock lever in the

arrow direction.

2.

While holding the lock lever,rotate
the cam gear until the cam gear
rib engages with the clamp lever.

3.

Push the slide holder backward to

engage the claw with the groove
and remove it in the direction

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

3. Socket .................... (P3) x4

2. Hook....................... (Q2) x3

1. Hook....................... (R1) x5 13-5

(J3) x2
(K1) x7

(N1) x6

12-4

12-2

12-2

13-2

CD-DP2500H

Note 1:

How to open the changer manually. (Fig. 12-1)

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 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.

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-DP2500H

Side Panel
(Right)

(B1)x2
ø3x10mm

(B1)x4
ø3x10mm

(A1)x2
ø3x12mm

Rear
Panel

Top Cabinet

Figure 11-1

CD Servo

(C3) x1

Pull

Rear
Panel

(C1)x1
ø3x10mm

(D1)x8
ø3x10mm

PWB

(C4)x3

Main PWB

DC Tray Cover

1

(D1)x2
ø3x10mm

Figure 11-2

(Fig. 12-2)

(A1)x2
ø3x12mm

Side Panel
(Left)

(B1)x2
ø3x10mm

(C2) x3

1

2

CD Player
Unit

(C3)x1

(E1)x3
ø3x10mm

– 11 –

CD-DP2500H

Figure 12-1

LOCK LEVER

CLAMP LEVER

Volume
Move
Unit

(H2)x4
ø3x12mm

(H3)x1

(L1)x5
ø3x10mm

(K1)x2
ø3x10mm

(K1)x4
ø3x10mm

(K1)x1
ø3x10mm

Bracket

Bracket

(K2)x1

Tape
Mechanism

Figure 12-4

Switch PWB

(H1)x1

Display PWB

(F3)x1

Headphones
PWB

Open

Cassette
Holder

Lug Wire

(E2)x2

Power
Supply
PWB

(F2)x1

(E3)x1

(E4)x1

(F1)x1

Figure 12-2

(F1)x1
ø3x10mm

CAM GEAR RIB

Front Panel

Main PWB

Volume
PWB

Motor
PWB

(J3)x2
ø2x4mm

Washer

(J2)x1

Figure 12-5

(J1)x1

(F2)x4

(G1)x2
ø3x10mm

Figure 12-3

Power
Supply
PWB

(E2)x1

– 12 –

(M2) x1

(P3) x2

(P2) x2

(P3) x2

CD Servo

PWB

CD Player

Base

(P1)x1
ø3x8mm

CD-DP2500H

Turntable

(M1) x2

1

Disc Tray

Figure 13-3

CD

(Q2) x3

Mechanism

CD Player Unit

Loading

Figure 13-1

(Q1) x1

(Q1) x1

Motor
PWB

(N1) x3

3

2

(R1) x5

(N1) x3

Figure 13-2

CP-DP2500H

STEP REMOVAL

1 Front Panel 1. Front Panel ............ (A1) x1 13-5

2 Woofer 1. Screw ..................... (B1) x4 13-5

4 Tweeter 1. Screw .................... (C1) x2 13-5

5 Super Tweeter 1. Screw .................... (D1) x2 13-5

PROCEDURE

FIGURE

Figure 13-4

CP-DP2500H

(A1)x1

(D1)x2

Ø3x10mm
(C1)x2

Ø3x10mm

(B1)x4

Ø4x12mm

Woofer

Screw Driver

Figure 13-5

– 13 –

CD-DP2500H

REMOVING AND REINSTALLING THE MAIN PARTS

TAPE MECHANISM SECTION

Perform steps 1 to 7 and 11 of the disassembly method to
remove the tape mechanism.

How to remove the record/playback and erase
heads (TAPE 2) (See Fig. 14-1)

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

How to remove the playback head (TAPE 1)
(See Fig. 14-2)

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

Erase Head

(A1)x2
Ø2 x 9mm

Figure 14-1

TAPE 2

TAPE 1

Record/Playback
Head

How to remove the pinch roller (TAPE 1/2)
(See Fig. 14-3)

1. Carefully push the inside claw to remove it. 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 1) (See Fig. 14-4)

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 2) (See Fig. 14-4)

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. 14-5)

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

(B1)x2
Ø2 x 9mm

Pinch Roller
(C1)x1

<B>

Figure 14-2

Figure 14-3

Playback
Head

Pinch Roller
Pawl

<A>

(F1) x2

Ø 2.6 x 5mm

Motor

– 14 –

TAPE 2

FF/REW
Belt
(E2)x1

Main Belt

Figure 14-4Figure 14-5

Motor

TAPE2
Main Belt
(E1)x1

Motor

TAPE1
Main Belt
(D1)x1

TAPE 1

FF/REW
Belt
(D2)x1

CD MECHANISM SECTION

Perform steps 1, 2, 3, and 13 to 15 of the disassembly method
to remove the CD mechanism.

CD-DP2500H

How to remove the loading motor
(See Fig. 15-1)

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

How to remove the pickup (See Fig. 15-2)

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.

(B1) x2
ø2.6 x6mm

Loading Motor

(A1)x1

(A1)x2

(A1)x2

CD Base

Figure 15-1

Stop Washer
(B3) x1

ADJUSTMENT

MECHANISM SECTION

• Driving Force Check

Torque Meter

Play: TW-2111 Tape 1: Over 80 g

• Torque Check

Torque Meter

Tape 1

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 2: Over 80 g

Specified Value

Tape 2

Pickup

Shaft
(B2) x1

Gear

CD Mechanism

(B4) x1

Figure 15-2

• Tape Speed

Test Tape

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

Adjusting

Point

motor. (Load
(MM1) resistance:

Specified

Value

TAPE MECHANISM

Instrument

Connection

6 ohms)

Motor

– 15 –

Variable Resistor in motor

Figure 15-3

CD-DP2500H
TUNER SECTION

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

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage

AM IF 450 kHz 1,620 kHz T351 *1
AM Band — 522 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

Instrument

Connection

TP302

CF351

IC303

AM IF

T351

MAIN PWB

IC302

CF352

CF302

T306

AM Band Coverage

TP301

CF301

FE301

T303

AM Tracking

CNP301

SO301
FM75 ohms

AM LOOP
ANTENNA

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 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 0dB.)

* Focus gain adjustment
* Tracking gain adjustment

Figure 16-1 ADJUSTMENT POINT

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)

0302 Pickup-in SW is not detected
0306 During Disc 1 search, Open/Close SW or Clamp SW

0307 Clamp SW not function (Low → High)
0308 Clamp SW not function (High → Low)

[Error during skip operation]

or Disc SW do not change to low.

T

T

1

3

Stopped

FDO

TE

CH1=500mV

DC 10:1

CH2=200mV

DC 10:1

CH3=1V

DC 10:1

1999/04/05 20:26:47

500ms/div

(500ms/div)

NORM:20kS/s

– 16 –

EFBL

2

Smoothing : ON CH1 : 0.000V
BW : FULL

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

Figure 16-2

=Record Length=

Main : 100K
Zoom : 2k

CH2
v/DIV
200mV

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

CD-DP2500H

EXPLANATION OF DOLBY SURROUND PRO LOGIC AND EVALUATION METHOD

Outline

• Namely, two speakers are connected in parallel to one
amplifier.

• In the Pro Logic BYPASS mode the amplifier for C-ch (center

channel) and the amplifier for S-ch (surround channel) are in
MUTE state. The SP output is cut.

• State of element output and terminal output in specific mode

State of set Dolby Pro Logic Dolby Pro Logic On mode
Output point Bypass mode Normal mode Phantom mode

IC501 1 pin L-out Output enabled state Output enabled state Output enabled state

2 pin R-out Output enabled state Output enabled state Output enabled state
IC501 3pin C-out No output Output enabled state No output
IC501 9pin S-out No output Output enabled state Output enabled state
SP OUT L-ch Output enabled state Output enabled state Output enabled state
(SO901) R-ch Output enabled state Output enabled state Output enabled state
SP OUT C-ch No output in MUTE (Q501) state Output enabled state No output in MUTE (Q501) state
(SO901)
SP OUT S-ch No output in MUTE (Q502) state Output enabled state Output enabled state
(SO901)

Test tone output

• Pro Logic ON Normal mode
Press the remote control TEST TONE button.
→Output of only L-ch →Output of only C-ch

↑ ↓

Output of only S-ch ← Output of only R-ch
The test tone (noise) is repeatedly output for output period
(2 sec).
In this case the following indication appears repeatedly.
→TEST →L-ch →C-ch

↑ ↓

S-ch ← R-ch

• Pro Logic ON Phantom mode
Press the remote control TEST TONE button.
→Output of only L-ch →Output of only R-ch

↑ ↓

← Output of only S-ch
The test tone (noise) is repeatedly output for output period
(2 sec).

In this case the following indication appears repeatedly.
→TEST → L-ch → R-ch

↑ ↓

← S-ch←

Relation between VIDEO IN input and output in Pro Logic
ON state

(1) L-ch/R-ch same phase input into VIDEO IN input jack in

VIDEO Function mode

Output point Normal mode

SP out L-ch Almost no output (only omitting component)
(SO901) R-ch Almost no output (only omitting component)

(SO901) SP out C-ch
(SO901) SP out S-ch

Input signal is output.
Almost no output (only omitting component)

• In the normal mode of Pro Logic ON mode the amplifiers for
C-ch and S-ch are in operative state, so that the SP output
appears.

• In the Phantom mode of Pro Logic ON mode the amplifier for
C-ch is in MUTE state, so that the SP output is cut. The
amplifier for S-ch (surround) is in operative state, so that the
SP output appears

Output point Phantom mode

SP out L-ch Input signal is output.
(SO901) R-ch Input signal is output.

(SO901) SP out C-ch SP cut, no output
(SO901) SP out S-ch

Almost no output (only omitting component)

(2) L-ch/R-ch reverse phase input into VIDEO IN input jack in

VIDEO Function mode

(Reverse phase: Phase difference between L and R is 180°)

Output point Normal mode

SP out L-ch
(SO901) R-ch

(SO901) SP out C-ch
(SO901) SP out S-ch Input signal is output.

Output point Phantom mode

SP out L-ch
(SO901) R-ch

(SO901) SP out C-ch SP cut, no output
(SO901) SP out S-ch Input signal is output.

Almost no output (only omitting component)
Almost no output (only omitting component)

Almost no output (only omitting component)

Almost no output (only omitting component)
Almost no output (only omitting component)

• Accordingly, if you want to output signal waveform to C-ch SP

out, give the same phase input into L-ch/R-ch INPUT in the
Pro Logic Normal mode.

If one of channels receives input, C-ch does not output. Only

L-ch or R-ch outputs.

• If you want to output signal waveform to S-ch SP out, you can

use either Normal mode or Phantom mode. However, 180°
reverse phase input must be given to L-ch/R-ch INPUT.

– 17 –

CD-DP2500H

TEST MODE

During POWER OFF mode,push below each 2 keys [ON/STAND-BY] key.
Then go to each TEST MODE.

KEY TEST MODE CONTENTS

[ON/STAND-BY] [TUNER] + [X-BASS] TEST 1 TUNER PRESET MEMORY CLEAR

[ON/STAND-BY] [MEMORY/SET] + [X-BASS] TEST 2 TUNER PRESET FOR PRODUCTION

[ON/STAND-BY] [>>] + [X-BASS] TEST 3 KEY AND DISPLAY TEST

[ON/STAND-BY] [CD] + [X-BASS] TEST 4 CD TEST MODE

[ON/STAND-BY] [TAPE] + [X-BASS] TEST 5 TAPE TEST MODE

[ON/STAND-BY] [>] + [X-BASS] TEST 6 ALL CLEAR(RESET)

[ON/STAND-BY] [TUN UP] + [X-BASS] TEST 7 AUDIO TEST

[ON/STAND-BY] [TUN DOWN] + [X-BASS] TEST 8 PRODUCTION INITIALIZE FOR CHANGER

[ON/STAND-BY] [STOP] + [X-BASS] TEST 10 RDS TEST

RDS OPERATION

There is no RDS (Radio Data System) broadcasting service in Australia and New Zealand.

ASPM, summary operation

Hold down the ASPM button for 3 more second.

“ASPM” blinks in the display.

Preset CH memory full over?

No

Begin to scan start 87.50 → 108.00 MHz

SD (TUNE) DET out OK?

Yes

If count 1st OK?

Yes

If count 2nd OK?

Yes

RDS signal or not? PI—identify

Yes

Comparing PI cord
same or not?
between current receiving
PI and before PI which is
already memorized by
ASPM on this time.

Yes

No operate. After displayed “END”. Return to
previous station.

No

No

No

No

Comparing freg.

No

same or not?
between current receiving
frequency and (already)
previouslymemorized
frequency.

Pass
No effect

Pass
No effect

Pass
No effect

Pass
No effect

No

Memorized to the lowest vacant
preset channel.

Effect

Displayed the TTL quantity of memorized
stations by ASPM operation on this time.
And return to the previous
receiving freq. automatically.

Yes

Preset CH memory become full over?

No

Begin to ASPM SCAN from the next
CH-SPAN again.

Repeat and continue with same format
ASPM operation untill 108 MHz.
After reached 108 MHz, displayed the TTL
quantity of memorized stations.
And return to the previous receiving freq.
automatically.

Yes

Compare the field
strength of current receiving
signal.
Is receiving signal stronger than
signal which has same PI cord
and is already memorized to
preset memory ahead of this
receiving time?

Yes

Comparing freg.
same or not?
Between current receiving
frequency and (already)
previously memorized
frequency.

No

Yes

– 18 –

No effect

No effect

Memorized to the lowest vacant
preset channel.

No effect

CD-DP2500H

• ASPM SCAN: 87.50MHz → 108.00 MHz.

• Only RDS signal is memorized by ASPM because RDS signal has PI code and is suitable and convenient for ASPM operation.
ASPM
Comparing field strength, only one strongest RDS station is memorized of all stations (repeater relay stations) that have same

PI code.

Each PI has AF’S list by individually.

Same PI code — freq: different

(AF’S)
PS: same
PTY:

[For example] Pickup and memorized to preset CH.

same

f 1
f 2 f 3

P 1 (PI code)
PS 1 (Station Name)

Select signals (f1, f5, f7, f10) are memorized in the preset memory by ASPM.

• If tentative - ASPM operation is repeated intentionally, never memorized (over write) at the same frequecy.
1st time ASPM → strongest stations of each PI are memorized.

ASPM is not only very usefull for PTY search, but also EON operation.
2nd time ASPM → 2nd strong stations of each PI are memorized and so on.
PTY search function is equal to FM band search function as a result.

f 5 f 4

P 2
PS 2

Exa: P1 has f1, f2, f3 (same PTY).
P2 has f4, f5 (same PTY).

---

f 6
f 7 f 8

P 3
PS 3

---

f9 f 10
f 11 f 12 f13

P 4
PS 4

1. Introduction of RDS for CD-DP2500H.

CD-BA2500H RDS function is equal to adding EON feature to the current CD-C75H RDS.
EON feature is EON—PTY and EON—TI.
Although PTY and TI indicators are separated, PTY contains TI in the PTY items (software) like current PTY search items.

NEWS, AFFAIRS, INFO, ALARM, TI (TTL 17 kinds)

EON—PTY EON—TI

↑

Can select and stand-by Can select and stand-by

EON—PTY and EON—TI are basically stand-by → receive the desired program of ON station.

2. The difference point from current CD-C75H RDS. (CD-C75H — CD-DP2500H)

1. PTY item: added TA. (TTL 18 kind.)

2. Each “TP”, “TA” ind. light up or go out individually.
“TA” ind. doesn’t light up on current model, CD-C75H due to none EON—TI.

3. Added 3 indicators(in FL) due to adding EON feature.
EON: Lights up only during receiving EON data (14A).
TI: During EON-TI stand-by → Light up

During receiving ON station. → blink.

PTY: During EON-PTY stand-by → Light up

During receiving ON station. → blink.

4. No adjust type (None adjusting circuit.)

5. Added EON button.

6. Need to change RDS logo due to the addition of EON feature.

7. Added EON—TI, EON—PTY function.

3. Summary of CD-DP2500H RDS—EON operation

EON—PTY: Select and set the desired “PTY” → stand-by → switch to ON (other network) Station at the start of desired PTY

automatically → stay and listen to PTY of ON station → switch back to TN (This net) station automatically at the end
of PTY (ON) i.e. after changing to another PTY (except AFFAIRS) or cancelling to receive PTY of ON station
midway.

EON—TI: Select and set the “TI” → stand-by → switch to ON station at the start of traffic announcement automatically → stay

and listen to TA of ON station → switch back to TN station automatically at the end of TA (ON).
ie after TA (ON) is over or cancelled to receive TA of ON station midway.

When switching TN → ON station.
In case of exist 2 more stations having the desired (specified) “PTY” or “TI”, the receiver will select and switch to ON station
comparing field strength at the same time. But when the frequency of ON station exists in the preset-memory, then receiver
switches straight to that ON station (CH), without comparing field strength so can make a quick switching from TN—ON station.
Preset memory takes priority of switching TN—ON station.
Therefore ASPM is usefull not only for PTY search but also for rapid EON switching.
Anyway CD-BA1500H EON is basically stand-by and receiving method, along with the Guidelines for EON implementation.

↑

– 19 –

CD-DP2500H

EON summary notice for reference

1. EON-TI/PTY EON stand-by can be set, only when EON ind. lights up.
While EON ind. goes out (NO EON STATION), EON stand-by can't be set.
If the EON button is pressed, then “NO EON” is indication the display.

2. EON-TI/PTY Even if switch back ON → TN station continue to keep EON stand-by.

3. EON-TI Don’t switch TN → ON during TN broadcast TA. (same item)

4. EON-TI/PTY

5. EON-TI/PTY EON stand-by is perfectly cancelled (cleared) by pressing EON button 2 times during stand-by or power OFF

6. EON-TI/PTY After setting EON stand-by, stand-by items can be confirmed by pressing EON button one time.

7. EON-TI/PTY EON button function: • EON setting

8. EON-TI/PTY After setting EON-TI and EON-PTY stand-by, if when EON data is not transmitted, EON ind goes out and

9. EON-TI EON-TI stand-by can't be set. When TP=0,TA=0 (TN) even if EON ind. lights up and the EON button is

10. EON-PTY Don’t switch TN → ON during TN broadcast same specified PTY. (same item of PTY)

11. EON-TI/PTY Switch TN→ON → TN station one cycle.

12. EON-TI/PTY After switch TN → ON station. When ON station is NO RDS, NO signal, TA=OFF or different PTY items.

13. EON-TI/PTY Switch TN → ON in case of 2 more stations exist, comparing field strength and switch to the strongest station,

14. EON-TI/PTY No linkage volume, power ON/OFF, and switch function.

EON can be cancelled during receiving ON station by pressing EON button if necessary and switch back ON→TN.
or Tun Up/Down or change band or recall pre-set CH.

• Confirm stand-by items

• Cancel (ON→TN)

• EON clear cancel (2 times)
EON stand-by is automatically cancelled display “NO EON”.
pressed then “NO TI” is indication the display.

Never switch TN → ON1 → ON2 → Other net to other net station.
The receiver switch back ON → TN displaying “NO READY”.

During receive ON station. when ON station become to be NO RDS, NO signal, TA=ON to OFF or different
PTY item, The receiver switch back ON → TN.

if these signals are same strength, switch to the first previous station.
If same frequency as AF'Sexists in the preset memory, then switch TN → ON (preset memory station) straight.
In case of exist 2 more preset memories of AF’S, then switch to the preset CH which taken in EON DATA
first, also in this case no concern to field strength.
Even if switch TN → ON preset memory straight, that ON station is very weak signal, then search another
AF'S (ON) station comparing field strength and switch to the strongest station as a result. Of all atations of
AF'S are very weak or no good condition, then, switch back ON → TN automatically display "NO READY".

Traffic Programme code

(TP)

OFF OFF This programme does not carry traffic announcements nor does

OFF ON This programmecarries EON information about another

ON OFF This programme carries traffic announcements but none are

ON ON A traffic announcement is being broadcast on this programme

Traffic Announcement code

(TA)

Applications

it refer, via EON, to a programme that does.

programme which gives traffic information.

being broadcast at present and may also carry EON information
about other traffic announcements.

at present.

– 20 –

CD-DP2500H

RDS (Radio Data System) OPERATION

RDS is a broadcasting service which a growing number of FM

stations are now providing. It allows these FM stations to send

additional signals along with their regular programme signals.

For example, the stations send their station names, and infor-

mation about what type of programme they broadcast, such as

sports or music, etc.

When tuned to an FM station which provide the RDS service,

the RDS will appear, the station frequency (and then the sta-

tion name if sent) is displayed.

The TP (Traffic Programme) will appear on the display when

the r eceived broadcast carries traffic announcements, and the

TA (Traf fic Announcement) will appear whilst a traffic announce-

ment is being received.

EON will appear whilst the EON (Enhanced Other Networks

information) data is being broadcast.

The PTYI (Dynamic PTY Indicator) will appear whilst the

Dynamic PTY station is being received.

Note:

When the TP and TA appear at the same time, an an-

nouncement is being made.

When only the TA appears, an announcement is not being made.

(See page 25.)

■

Information Provided by RDS

With the CD-DP2500H, you can display three types of RDS

service. T o show them in the display , press the DISPLA Y MODE

button.

Each time you press the DISPLAY MODE button, the display

will change to show the following information.

Station names commonly known

will be displayed.

“NO PS” appears if no signal is

being received.

Programme type will be dis-

played.

“NO PTY” appears if no signal is

being received.

Radio text will be displayed.

“NO RT” appears if no signal is

being received.

Station frequencies.

↓

PS (Programme Service):

↓

PTY (Programme Type):↓RT (Radio Text):↓Station Frequency:

NEWS:

Short accounts of facts, events and publicly

expressed views, reportage and actuality.

AFFAIRS:

Topical programme expanding or enlarging

upon the news, generally in different presen-

tation style or concept, including debate, or

analysis.

INFO:

Programmes whose purpose is to impart ad-

vice in the widest sense.

SPORT:

Programme concerned with any aspect of

sport.

EDUCATE:

Programme intended primarily to educate, of

which the formal element is fundamental.

DRAMA:

All radio plays and serials.

CULTURE:

Programmes concerned with any aspect of na-

tional or regional culture, including language,

theatre, etc.

SCIENCE:

Programmes about the natural sciences and

technology.

VARIED:

Used for mainly speech-based programmes

usually of light-entertainment nature, not cov-

ered by other categories. Examples include:

quizzes, panel games, personality interviews.

POP M:

Commercial music, which would generally be

considered to be of current popular appeal,

often featuring in current or recent record sales

charts.

ROCK M:

Contemporary modern music, usually written

and performed by young musicians.

EASY M:

Cur rent contemporary music considered to

be “easy-listening”, as opposed to Pop, Rock

or Classical, or one of the specialized music

styles, Jazz, Folk or Country. Music in this cat-

egory is often but not always, vocal, and usu-

ally of short duration.

LIGHT M:

Classical Musical for general, rather than spe-

cialist appreciation. Examples of music in this

category are instrumental music, and vocal or

choral works.

CLASSICS:

Performances of major orchestral works, sym-

phonies, chamber music etc., and including

Grand Opera.

OTHER M:

Musical styles not fitting into any of the other

categories. Particularly used for specialist mu-

sic of which Rhythm & Blues and Reggae are

examples.

WEATHER:

Weather reports and forecasts and Meteoro-

logical information.

FINANCE:

Stock Market reports, commerce, trading etc.

CHILDREN:

For programmes targeted at a young audience,

primarily for entertainment and interest, rather

than where the objective is to educate.

SOCIAL:

Programmes about people and things that in-

fluence them individually or in groups. Includes:

sociology, history , geography, psychology and

society.

RELIGION:

Any aspect of beliefs and faiths, involving a God

or Gods, the nature of existence and ethics.

PHONE IN:

Involving members of the public expressing their

views either by phone or at a public forum.

TRAVEL:

Features and programmes concerned with

travel to near and far destinations, package

tours and travel ideas and opportunities. Not

for use for Announcements about problems,

delays, or roadworks affecting immediate travel

where TP/TA should be used.

LEISURE:

Programmes concerned with recreational ac-

tivities in which the listener might participate.

Examples include, Gardening, Fishing. Antique

collecting, Cooking, Food & Wine etc.

JAZZ:

Polyphonic, syncopated music characterised

by improvisation.

COUNTRY:

Songs which originate from, or continue the

musical tradition of the American Southern

States. Characterised by a straightforward

melody and narrative story line.

NATION M:

Current Popular Music of the Nation or Region

in that country’s language, as opposed to In-

ternational ‘Pop’ which is usually US or UK in-

spired and in English.

OLDIES:

Music from the so-called “golden age” of popu-

lar music.

FOLK M:

Music which has its roots in the musical cul-

ture of a particular nation, usually played on

acoustic instruments. The narrative or story

may be based on historical events or people.

DOCUMENT:

Programme concerned with factual matters,

presented in an investigative style.

TEST:

Broadcast when testing emergency broadcast

equipment or receivers.

ALARM !:

Emergency announcement made under excep-

tional circumstances to give warning of events

causing danger of a general nature.

NONE:

No programme type (receive only).

TP:

Broadcasts which carry traffic announcements.

TA:

Traffic announcements are being broadcast at

present.

(Continued)

Descriptions of the PTY (Programme Type) codes, TP (Traffic Programme) and TA (Traffic Announcement)

With the CD-DP2500H, you can search for and receive the following PTY, TP and TA signals.

Note:

●

When the unit is in the EON stand-by mode and a programme

is selected, the unit will display “TI” instead of “TA”.

– 21 –

CD-DP2500H

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 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 “ ” ( ) 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 POSITION

SW1 OPEN/CLOSE ON—OFF
SW2 CLAMP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW701 CD ON—OFF
SW702 TAPE ON—OFF
SW703 TUNING DOWN ON—OFF
SW704 MEMORY/SET ON—OFF
SW705 REV ON—OFF
SW706 FF ON—OFF
SW707 PLAY ON—OFF
SW708 STOP ON—OFF
SW710 REC ON—OFF
SW711 TUNING UP ON—OFF
SW712 VIDEO ON—OFF
SW713 TUNING ON—OFF
SW714 DIMMER ON—OFF
SW715 X-BASS ON—OFF

REF. NO DESCRIPTION

SW716 EQUAL ON—OFF
SW717 NORMAL ON—OFF
SW718 PHANTOM ON—OFF
SW719 BY-PASS ON—OFF
SW720 POWER ON—OFF
SW721 CLOCK ON—OFF
SW722 TIMER ON—OFF
SW723 PTY.TI SEARCH ON—OFF
SW724 EON ON—OFF
SW725 ASPM ON—OFF
SW726 DISPLAY MODE ON—OFF
SW727 STATION ON—OFF
SW728 DISC 1 ON—OFF
SW729 DISC 2 ON—OFF
SW730 DISC 3 ON—OFF
SW731 DISC SKIP ON—OFF
SW732 OPEN/CLOSE ON—OFF

FRONT

VIEW

E C B

(S) (G) (D)
(1) (2) (3)

KTA1266 GR
KRC102 M
KRC104 M
KTA1271 Y
KTA1274 Y

KTA1273 Y
KTC3203 Y
KTC3199 GR
KTC107 M
2SC3203 Y
KTC3194 Y

FRONT

VIEW

BCE

KTD2026 Y

Figure 22 TYPES OF TRANSISTOR AND LED

– 22 –

FRONT
VIEW

4204SRT7
4204UYT7

CNP12

CNP11

CNP5 CNS99

Q2

+3.3V

+5V

CONT5

CONT2

CONT3

CONT4

CONT7

CONT6

SLD0

SPD0

FD0
TD0

+5V

TO DISPLAY SECTION

CLAMP SW

CDINT

WRQ

CE

DO

CLK

DI

CD RES

GND

DRF

CNS4

BI4

CNP4

M2

SLED

MOTOR

M1

SPINDLE

MOTOR

M

M

TRACKING COIL

FOCUS COIL

PICKUP UNIT

TE

FE

RFEV

HFL

VVDD

ADAVDD

VDD

LVDD

RVDD

XVDD

VDD5V

RFEV

FE-

FE

TE-

TE

HFL

+3.3V

Q1

LDD

PD

TIN2

TIN1

FIN2

FIN1

IC3

M63001FP

FOCUS/TRACKING/

SPIN/SLIDE DRIVER

IC1

LA9235M

SERVO AMP.

TO MAIN SECTION

(TO IC601)

CD DIGITAL OUT

IC99

R-CH

L-CH

AGND

DGND

+B6(+5V)

RCHO

RVSS

LVSS

LCHO

IC2

LC78641E

SERVO/SIGNAL

CONTROL

-

+

M

SW1
OPEN/
CLOSE

XL1

16.9344MHz

6

5

43

3

2

5

4

1

3

21

3

21

12

34

7

8

217

89

10

12

4

3

5

SW2

CLAMP

SW3
DISC

NUMBER

M3

T/T

UP/DOWN

MOTOR

6

12

4

3

56

12

4

3

56

75

DOUT

37

76

45 46

47 48 32 31

30
65
66
67
68
69
70
71
72

CE
CL

DI

DO

INT

WRQ

RES

DEF

52

51

XOUT

XIN

735183644 49 50 7 14 15 16

23

24

25

26

33

3

13

19

40

64

74

17

18 19 20

21

22

30

23
11

9

1

45671516 26 27

2 1725 4142 3839

35

29
22
21
14

8

40
24
23
28

SW4

PICKUP IN

Q3

LASER
DRIVER

CONSTANT

VOLTAGE

+3.3V

+5V

VCC4

18

VCC1

VCC2

VCC3

CD-DP2500H

Figure 23 BLOCK DIAGRAM (1/3)

– 23 –