Sharp CP-SW2500W, CP-C2500W, CP-SR2500W, CP-F2500W Service Manual

HT-DP2500W

– 1 –

Page

AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ...................................................................................................... 1

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

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

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

OPERATION MANUAL.......................................................................................................................................................... 4

DISASSEMBLY...................................................................................................................................................................... 6

ADJUSTMENT ...................................................................................................................................................................... 8

NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................... 9

BLOCK DIAGRAM ............................................................................................................................................................... 10

SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD................................................................................................... 12

TYPES OF TRANSISTOR AND LED.................................................................................................................................... 19

FUNCTION TABLE OF IC.................................................................................................................................................... 24

FL SEGMENT ...................................................................................................................................................................... 28

PARTS GUIDE/EXPLODED VIEW

CONTENTS

HT-DP2500W

No. S0884HTDP2500

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

SERVICE MANUAL

SHARP CORPORATION

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

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

QACCE0008AW00

AC POWER SUPPLY CORD AND AC PLUG ADAPTOR

QACCL0005AW00

OPLGA0250AFZZ

HT-DP2500W home theater system consisting of
HT-DP2500W home theater system, CP-F2500W,
CP-SW2500W, CP-C2500W and CP-SR2500W.

All manuals and user guides at all-guides.com

all-guides.com

HT-DP2500W

– 1 –

Page

AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ...................................................................................................... 1

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

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

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

OPERATION MANUAL.......................................................................................................................................................... 4

DISASSEMBLY...................................................................................................................................................................... 6

ADJUSTMENT ...................................................................................................................................................................... 8

NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................... 9

BLOCK DIAGRAM ............................................................................................................................................................... 10

SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD................................................................................................... 12

TYPES OF TRANSISTOR AND LED.................................................................................................................................... 19

FUNCTION TABLE OF IC.................................................................................................................................................... 24

FL SEGMENT ...................................................................................................................................................................... 28

PARTS GUIDE/EXPLODED VIEW

CONTENTS

HT-DP2500W

No. S0884HTDP2500

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

SERVICE MANUAL

SHARP CORPORATION

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

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

QACCE0008AW00

AC POWER SUPPLY CORD AND AC PLUG ADAPTOR

QACCL0005AW00

OPLGA0250AFZZ

HT-DP2500W home theater system consisting of
HT-DP2500W home theater system, CP-F2500W,
CP-SW2500W, CP-C2500W and CP-SR2500W.

All manuals and user guides at all-guides.com

HT-DP2500W

– 2 –

SPECIFICATIONS

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.

VOLTAGE SELECTION

The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the
selector in either direction until the correct voltage figure is displayed in the window next to the adjustment screw.

● General

Type: Home theater system
Power source: AC 110/127/220/230 - 240 V,

50/60 Hz

Power consumption: 105 W
Dimensions: Width; 430 mm (16-15/16")

Height; 116 mm (4-5/8")
Depth; 322 mm (12-11/16")

Weight: 7.3 kg (16.1 lbs.)
Output power:
(For Australia/
New Zealand)

(Front)
RMS; 50 W (25 W + 25 W)
(10% T.H.D.)
(Centre)
RMS; 25 W (10% T.H.D.)
(Surround)
RMS; 25 W (total) (10% T.H.D.)
(Sub woofer)
RMS; 25 W (10% T.H.D.)

Output terminals: Front speakers; 8 ohms

Centre speaker; 8 ohms
Surround speakers; 16 ohms
Sub woofer; 8 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)

Input terminals: VCR-1, VCR-2, AUX (Audio sig-

nal); 500 mV/47 kohms

● Tuner section

Frequency range: FM; 88-108 MHz

AM; 531-1,602 kHz

● Front speaker section

Type: 2-way, 10 cm (4") woofer, and 5

cm (2") tweeter

Maximum input
power: 50 W
Rated input power: 25 W
Impedance: 8 ohms
Dimensions: Width; 150 mm (5-15/16")

Height; 200 mm (7-7/8")
Depth; 125 mm (4-15/16")

Weight: 1.5 kg (3.3 lbs.)/each

● Centre speaker section

Type: 10 cm (4") full-range speaker
Maximum input
power: 50 W
Rated input power: 25 W
Impedance: 8 ohms
Dimensions: Width; 200 mm (7-7/8")

Height; 150 mm (5-15/16")
Depth; 125 mm (4-15/16")

Weight: 1.3 kg (2.9 lbs.)

● Surround speaker section

Type: 10 cm (4") full-range speaker
Maximum input
power: 25 W
Rated input power: 12.5 W
Impedance: 16 ohms
Dimensions: Width; 150 mm (5-15/16")

Height; 170 mm (6-3/4")
Depth; 105 mm (4-3/16")

Weight: 1.0 kg (2.2 lbs.)/each

● Sub woofer section

Type: 13 cm (5-1/8") woofer
Maximum input
power: 50 W
Rated input power: 25 W
Impedance: 8 ohms
Dimensions: Width; 210 mm (8-5/16")

Height; 310 mm (12-1/4")
Depth; 310 mm (12-3/16")

Weight: 4.2 kg (9.3 lbs.)

HT-DP2500W

CP-F2500W

CP-C2500W

CP-SR2500W

CP-SW2500W

Output power:
(Except for Australia/
New Zealand)

(Front)
RMS; 50 W (25 W + 25 W)
(10% T.H.D.)
(Centre)
RMS; 25 W (10% T.H.D.)
(Surround)
RMS; 25 W (total) (10% T.H.D.)
(Sub woofer)
RMS; 25 W (10% T.H.D.)

PMPO; 1,000 W

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HT-DP2500W

– 2 –

SPECIFICATIONS

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.

VOLTAGE SELECTION

The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the
selector in either direction until the correct voltage figure is displayed in the window next to the adjustment screw.

● General

Type: Home theater system
Power source: AC 110/127/220/230 - 240 V,

50/60 Hz

Power consumption: 105 W
Dimensions: Width; 430 mm (16-15/16")

Height; 116 mm (4-5/8")
Depth; 322 mm (12-11/16")

Weight: 7.3 kg (16.1 lbs.)
Output power:
(For Australia/
New Zealand)

(Front)
RMS; 50 W (25 W + 25 W)
(10% T.H.D.)
(Centre)
RMS; 25 W (10% T.H.D.)
(Surround)
RMS; 25 W (total) (10% T.H.D.)
(Sub woofer)
RMS; 25 W (10% T.H.D.)

Output terminals: Front speakers; 8 ohms

Centre speaker; 8 ohms
Surround speakers; 16 ohms
Sub woofer; 8 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)

Input terminals: VCR-1, VCR-2, AUX (Audio sig-

nal); 500 mV/47 kohms

● Tuner section

Frequency range: FM; 88-108 MHz

AM; 531-1,602 kHz

● Front speaker section

Type: 2-way, 10 cm (4") woofer, and 5

cm (2") tweeter

Maximum input
power: 50 W
Rated input power: 25 W
Impedance: 8 ohms
Dimensions: Width; 150 mm (5-15/16")

Height; 200 mm (7-7/8")
Depth; 125 mm (4-15/16")

Weight: 1.5 kg (3.3 lbs.)/each

● Centre speaker section

Type: 10 cm (4") full-range speaker
Maximum input
power: 50 W
Rated input power: 25 W
Impedance: 8 ohms
Dimensions: Width; 200 mm (7-7/8")

Height; 150 mm (5-15/16")
Depth; 125 mm (4-15/16")

Weight: 1.3 kg (2.9 lbs.)

● Surround speaker section

Type: 10 cm (4") full-range speaker
Maximum input
power: 25 W
Rated input power: 12.5 W
Impedance: 16 ohms
Dimensions: Width; 150 mm (5-15/16")

Height; 170 mm (6-3/4")
Depth; 105 mm (4-3/16")

Weight: 1.0 kg (2.2 lbs.)/each

● Sub woofer section

Type: 13 cm (5-1/8") woofer
Maximum input
power: 50 W
Rated input power: 25 W
Impedance: 8 ohms
Dimensions: Width; 210 mm (8-5/16")

Height; 310 mm (12-1/4")
Depth; 310 mm (12-3/16")

Weight: 4.2 kg (9.3 lbs.)

HT-DP2500W

CP-F2500W

CP-C2500W

CP-SR2500W

CP-SW2500W

Output power:
(Except for Australia/
New Zealand)

(Front)
RMS; 50 W (25 W + 25 W)
(10% T.H.D.)
(Centre)
RMS; 25 W (10% T.H.D.)
(Surround)
RMS; 25 W (total) (10% T.H.D.)
(Sub woofer)
RMS; 25 W (10% T.H.D.)

PMPO; 1,000 W

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HT-DP2500W

– 3 –

NAMES OF PARTS

HT-DP2500W

■ Front panel

1. Left Front Speaker Indicator

2. Centre Speaker Indicator

3. Right Front Speaker Indicator

4. Dolby Pro Logic Indicator

5. Extra Bass Indicator

6. Sleep Indicator

7. Timer Play Indicator

8. (TUNER) FM Stereo Indicator

9. (TUNER) Memory Indicator

10. (TUNER) FM Stereo Mode Indicator

11. Left Surround Speaker Indicator

12. Surround Signal Indicator

13. Sub Woofer Indicator

14. Right Surround Speaker Indicator

15. On/Stand-by Button

16. Remote Control Sensor

17. Stand-by Indicator

18. Timer Indicator

19. Dolby Pro Logic Button

20. Equalizer Selector Button

21. Extra Bass Button

22. Volume Control

23. Headphone Socket

24. Function Selector Buttons

25. (TUNER) Tuning Up/Down Buttons

26. Memory Button

27. Timer/Sleep Selector Button

28. Jog Dial

29. Enter Button

30. Sub Woofer Volume Control

■ Rear panel

1. AM Aerial Terminal

2. Aerial Earth Terminal

3. FM 75 Ohms Aerial Terminal

4. VCR-1 Output Sockets

5. VCR-1 Input Sockets

6. VCR-2 Input Sockets

7. AUX Input Sockets

8. Surround Speaker Sockets

9. Front/Centre/Sub Woofer Sockets

10. AC Voltage Selector

11. AC Power Lead

■ Remote control

1. Remote Control Transmiter LED

2. On/Stand-by Button

3. Function Selector Buttons

4. Preset Balance Button

5. Dolby Pro Logic Button

6. Test Tone Button

7. Tuner Call Button

8. Mute Button

9. Balance Selector Buttons

10. Equalizer Selector Button

11. Extra Bass Button

12. Centre Level Buttons

13. Surround Level Buttons

14. (TUNER) Preset Up/Down Buttons

15. Volume Control Buttons

1

7

8

9

10

11

1213 14

23 4 56

15

161718

26 27 28

29

30

19

20 21 22

23 24

25

1
2
3

4

5

67

10

11

8

9

1

2
3

4

5
6

7

8

9
10

11

12
13
14

15

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HT-DP2500W

– 4 –

OPERATION MANUAL

CP-C2500W

CP-SR2500W

CP-SW2500W

Center Speaker

1. Woofer

2. Speaker Cord

Surround Speaker

1. Woofer

2. Speaker Cord

Sub woofer

1. Woofer

2. Bass Reflex Duct

3. Speaker Cord

CP-F2500W

Front Speaker

1. Tweeter

2. Woofer

3. Speaker Cord

1
2

3

1

2

2

1

3

1

2

PREPARATION FOR USE

■

Remote control

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 con-
trol 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 direc-
tion of the unit.

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

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

15˚

15˚

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HT-DP2500W

– 4 –

OPERATION MANUAL

CP-C2500W

CP-SR2500W

CP-SW2500W

Center Speaker

1. Woofer

2. Speaker Cord

Surround Speaker

1. Woofer

2. Speaker Cord

Sub woofer

1. Woofer

2. Bass Reflex Duct

3. Speaker Cord

CP-F2500W

Front Speaker

1. Tweeter

2. Woofer

3. Speaker Cord

1
2

3

1

2

2

1

3

1

2

PREPARATION FOR USE

■

Remote control

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 con-
trol 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 direc-
tion of the unit.

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

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

15˚

15˚

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HT-DP2500W

– 5 –

(Continued)

■

AM/FM Interval (span)

The International Telecommunication Union (ITU) has estab-
lished 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).
This product is not equipped with a span selector. However,

it will be adjusted to 9 kHz AM interval (50 kHz FM interval)
when shipped from the factory.
Before using the unit, be sure to set it for the AM tuning
interval (span) used in your area.

To check the tuning span currently selected:

1

Set the ON/STAND-BY button on the main unit to ON.

2

Press the TUNER (BAND) button until "FM" or "AM" ap-
pears in the display.

3

Press the TUNER (BAND) button to select the AM band.

● If "AM 531 kHz" is displayed, it means that the radio has
been adjusted for a 9 kHz span. If "AM 530 kHz" is dis-
played, it means that the radio has been adjusted for a
10 kHz span.

To change from a 9 kHz AM (50 kHz FM) interval to a
10 kHz AM (100 kHz FM) interval:

1

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

2

Hold down the TUNER (BAND) button and the ENTER
button for at least 4 seconds. Release the buttons when
"AM SP 10 kHz" and "FM SP 100 kHz" are displayed
alternately.

To return to a 9 kHz AM (50 kHz FM) interval:

1

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

2

Hold down the TUNER (BAND) button and the ENTER
button for at least 4 seconds. Release the buttons when
"AM SP 9 kHz" and "FM SP 50 kHz" are displayed al-
ternately.

Caution:

● When the unit is left for a few hours after the span has
been switched and AC power lead disconnected, it will
be automatically returned to a 9 kHz span. If this hap-
pens, set the span again.

● When the span is switched, any stations that are
memorised will be cancelled.

ON/STAND-BY

TUNER (BAND)

ENTER

ON/
STAND-BY

[9 kHz → 10 kHz]

(4 seconds)

[10 kHz → 9 kHz]

(4 seconds)

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HT-DP2500W

– 6 –

1 Top Cabinet 1. Screw ................. (A1) x5 6-1

2 Rear Panel 1. Screw ............... (B1) x11 6-1

3

Front Panel

1. Screw .................(C1) x5 6-2

2. Flat Cable ...........(C2) x1

3. Socket ................(C3) x3

4 Main PWB/ 1. Screw .................(D1) x7 6-2

Tuner PWB 2. Socket ................(D2) x3

5 Power Supply PWB 1. Screw ................. (E1) x5 6-2

(With Voltage Selector

2. Socket ................ (E2) x3

Switch PWB)

6 Display PWB 1. Knob ................... (F1) x1 6-3

2. Nut ...................... (F2) x1

3. Screw ............... (F3) x10

4. Socket ................ (F4) x1

5. Knob ................... (F5) x1

7 Switch PWB 1. Screw ................ (G1) x2 6-3

8

Headphones PWB

1. Screw ................ (H1) x1 6-3

Caution on Disassembly

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

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

2. 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.

3. Take suff cient care on static electricity of integrated
circuits and other circuits when servicing.

DISASSEMBLY

Figure 6-2

Figure 6-1

HT-DP2500W

CP-F2500W

HT-DP2500W

STEP

REMOVAL

PROCEDURE

FIGURE

1 Speaker 1. Net ........................(A1) x1 7-1

2. Screw ....................(A2) x6

REMOVAL PROCEDURESTEP FIGURE

CP-C2500W

STEP REMOVAL PROCEDURE

FIGURE

1 Speaker 1. Net ........................(A1) x1 7-3

2. Screw ....................(A2) x4

CP-SR2500W

STEP

REMOVAL

PROCEDURE FIGURE

1 Speaker 1. Net ........................(A1) x1 7-4

2. Screw ....................(A2) x4

CP-SW2500W

STEP

REMOVAL PROCEDURE

FIGURE

1 Speaker 1. Net ........................(A1) x1 7-2

2. Screw ....................(A2) x4

Figure 6-3

Front Panel

(F3)x10
ø3x10mm

(F4)x1

(F1)x1

(F2)x1

(H1)x1
ø3x10mm

(G1)x2
ø3x10mm

Switch PWB

(F5)x1

Display PWB

PWB Washer

HeadphonesPWB

(A1)x2
ø3x10mm

(A1)x1
ø3x10mm

Top Cabinet

Front Panel

(A1)x2
ø3x10mm

(B1)x11
ø3x10mm

Rear
Panel

Voltage Selector
Switch PWB

(D1)x3
ø3x8mm

(E1)x5
ø3x8mm

(D1)x4
ø3x8mm

Main
PWB

Tuner
PWB

Front Panel

(C1)x1
ø3x8mm

(C1)x1
ø3x8mm

(C1)x3
ø3x8mm

(C3)x1

Power Supply
PWB

(C3)x1

(C2)x1

(E2)x2

(D2)x1

(D2)x2

(E2)x1

(C3)x1

Power Amp. PWB

Headphones
PWB

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HT-DP2500W

– 7 –

Figure 7-3

Figure 7-4

Figure 7-2

Figure 7-1

CP-F2500W

CP-SW2500W

CP-C2500W

CP-SR2500W

Screw
Driver

(A1)x1

(A2)x4
ø4x13mm

(A2)x2
ø4x13mm

Tweeter

Woofer

Speaker Box

Top Side

Screw
Driver

(A1)x1

(A2)x4
ø4x13mm

Speaker Box

Top Side

Woofer

Screw
Driver

(A1)x1

(A2)x4
ø4x13mm

Speaker Box

Woofer

Top Side

Screw
Driver

(A1)x1

(A2)x4
ø4x13mm

Speaker Box

Woofer

Top Side

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HT-DP2500W

– 8 –

Figure 8 ADJUSTMENT POINTS

TUNER SECTION

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

Instrument

Connection

• FM RF

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

Test Stage

Frequency

Frequency

Display

Setting/

Adjusting

Parts

Band — 87.50 kHz (fL): L202 *1
Coverage 3.4 ± 0.1 V

RF 98 MHz 98.00 MHz L201 *2

(10 - 30 dB)

*1. Input: Antenna, Output: TP302
*2. Input: Anetnna, Output: Speaker Terminal

• FM Detection

Signal generator: 10.7 MHz, FM sweep

Test Stage

Instrument

Connection

Frequency

Frequency

Display

Setting/

Adjusting

Parts

IF 10.7 MHz 98.00 MHz T202 Input: Pin 1

(Turn the of IC201
core of T202 Output:
fully counter- Pin 1of
clockwise) IC203

ADJUSTMENT

IF 450 kHz 1,602 kHz T204 *1
Band — 531 kHz (fL): T203 *2

(AM Band
Coverage

0.8V±0.1v

Tracking 990 kHz 990 kHz T201 *1

Test Stage

Instrument

Connection

Frequency

Frequency

Display

Setting/

Adjusting

Parts

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

• Setting the Test Mode

Keeping the ENTER button and MEMORY button pressed,
turn on POWER (of Main Set). Then, the frequency is initially
set in the memory as shown in Table. Call it with the JOG to
use it for adjustment and check of tuner circuit.

Preset No.

1 87.50 MHz 6 531 kHz
2 108.00 MHz 7 1,602 kHz
3 98.00 MHz 8 990 kHz
4 90.00 MHz 9 603 kHz
5 106.00 MHz 10 1,404 kHz

11~40

FM Preset No.

AM

*1. Input: Antenna, Output: TP301
*2. Input: Input is not connected, Output: TP302

*1. Adjust so that an output signal appears.

• FM Mute Level

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

Frequency Adjusting

Parts

Instrument

Connection

Frequency

Display

98.0 MHz 98.00 MHz VR201 *1 Input: SOC201
(25 dBµV) Output: Speaker

Terminal

T201

AM TRACKING

AM BAND
COVERAGE

T203

R216

TP302

L201

FM RF

IC201

T202

L202

FM IF

VR201

FM MUTE
LEVEL

T204

IC203

TP301

R223

TUNER PWB

FM BAND
COVERAGE

SOC201
ANTENNA
TERMINAL

1

AM IF

1

12

13

24

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HT-DP2500W

– 9 –

EXPLANATION OF AUTOMATIC SOUND VALUE CORRECTION CONTROL

1. Outline
The recent trend is toward rise of CD record level in the world, for example rock, dancing music, etc. In case of continuous high
level playback G-EQ (graphic equalizer) and VOL (Volume) are controlled (lowered) automatically after a lapse of specific time
(10 minutes) so as to get the easy-to-listen sound level.

2. Explanation of operation
The CD playback operation is explained below.

If hight energy exceeding X is detected, VOL is lowered to get sound easy to listen.

X

: Threshold value of control circuit operation

A : Hight energy (hatched area) exceeding X is detecated, and the control mode is set.
B : After a lapse of 10 minutes the control is started.

Data is fetched every 4
seconds to control.

Initial frequency

characteristics.

Hand L frequency char-
acteristics are lowered.

VOL (Volume) is lowered.

Stable control
Continued control

The output data is fetched every 4 seconds to control. When quiet music is played back, the
control is performed so as to restore the initial frequency characteristics and initial VOL values.

Control mode cancel conditions

When output exceeding X is not given
continuously for 10 minutes.

When quiet music is played back.
When VOL is lowered.

When the power is turned off or on.

B ~ C :

C ~ D :

A

X

B C D

0w

10 minutes

Distortion clip point

SP output
level

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 electro-
lytic capacitor, the expression “capacitance/withstand volt-
age” 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, VCR1.

3. In the power section, VCR1.

• 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.

SW1 ON STAND-BY ON—OFF
SW2 TIMER/SLEEP ON—OFF
SW3 DOLBY PRO LOGIC ON—OFF
SW4 EQUALIZER ON—OFF
SW5 X-BASS ON—OFF
SW6 ENTER ON—OFF
SW7 VOLUME DOWN ON—OFF
SW8 VOLUME UP ON—OFF
SW9 MEMORY/SET ON—OFF

POSITIONREF. NO DESCRIPTIONREF. NO DESCRIPTION POSITION

SW10 TUNING UP ON—OFF
SW11 TUNING DOWN ON—OFF
SW12 TUNER(BAND) ON—OFF
SW13 CD/AUX ON—OFF
SW14 VCR-2 ON—OFF
SW15 VCR-1 ON—OFF
SW23 JOG DIAL ON—OFF
SW601 VOLTAGE SELECTOR 110V

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HT-DP2500W

– 9 –

EXPLANATION OF AUTOMATIC SOUND VALUE CORRECTION CONTROL

1. Outline
The recent trend is toward rise of CD record level in the world, for example rock, dancing music, etc. In case of continuous high
level playback G-EQ (graphic equalizer) and VOL (Volume) are controlled (lowered) automatically after a lapse of specific time
(10 minutes) so as to get the easy-to-listen sound level.

2. Explanation of operation
The CD playback operation is explained below.

If hight energy exceeding X is detected, VOL is lowered to get sound easy to listen.

X

: Threshold value of control circuit operation

A : Hight energy (hatched area) exceeding X is detecated, and the control mode is set.
B : After a lapse of 10 minutes the control is started.

Data is fetched every 4
seconds to control.

Initial frequency

characteristics.

Hand L frequency char-
acteristics are lowered.

VOL (Volume) is lowered.

Stable control
Continued control

The output data is fetched every 4 seconds to control. When quiet music is played back, the
control is performed so as to restore the initial frequency characteristics and initial VOL values.

Control mode cancel conditions

When output exceeding X is not given
continuously for 10 minutes.

When quiet music is played back.
When VOL is lowered.

When the power is turned off or on.

B ~ C :

C ~ D :

A

X

B C D

0w

10 minutes

Distortion clip point

SP output
level

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 electro-
lytic capacitor, the expression “capacitance/withstand volt-
age” 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, VCR1.

3. In the power section, VCR1.

• 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.

SW1 ON STAND-BY ON—OFF
SW2 TIMER/SLEEP ON—OFF
SW3 DOLBY PRO LOGIC ON—OFF
SW4 EQUALIZER ON—OFF
SW5 X-BASS ON—OFF
SW6 ENTER ON—OFF
SW7 VOLUME DOWN ON—OFF
SW8 VOLUME UP ON—OFF
SW9 MEMORY/SET ON—OFF

POSITIONREF. NO DESCRIPTIONREF. NO DESCRIPTION POSITION

SW10 TUNING UP ON—OFF
SW11 TUNING DOWN ON—OFF
SW12 TUNER(BAND) ON—OFF
SW13 CD/AUX ON—OFF
SW14 VCR-2 ON—OFF
SW15 VCR-1 ON—OFF
SW23 JOG DIAL ON—OFF
SW601 VOLTAGE SELECTOR 110V

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HT-DP2500W

– 10 –

Figure 10 BLOCK DIAGRAM (1/2)

1

6

3

4

5

7

2

3

7

6

AM RF

OSC

AM IF

FMOSC

FM IN

AM IN

IC202

LC72131

PLL CONTROLLER

STEREO

OSC

X202

4.5MHz

FM IF

FM IF IN

AM MIX

OUT

AM
OSC

OUT

IN

AFC

AM RF IN

SD

IF IN

MPX

IN

L-CH

R-CH

MPX
VCO
CUT

DICLCE

DO

+5V

VOLTAGE

REGURATER

A+12V

SD

+B3

1

AM

FM

AM ANTENNA

2

3

4

9

8

5

6

7

VT

FM IF

L202

FM OSC

FM IF
AMP

VT

FM +B

FM

AM OSC.

1

4

5

8 9

17 18

19 16

15

14 13

12

11

10

21

22

23

24

+B3

IC201

FM FRONT END

TA7358AP

L201

FM RF

T202

FM IF

T201

T203

Q201

SOC201

ANTENNA

TERMINAL

CF201

Q281

IF AMP

T204

IC203 LA1833

FM IF DET./FM MPX./AM IF

CF203

CF202
FM IF

FM

OUT

AM

OUT

Q202

MUTING

TUNER
MUTE

VR201

FM MUTE LEVEL

REQ

VCC

GND

AM IF

FM

DET

PHASE

9

10

21

17

12

11

16

15

22

20

AM/FM

Q203

A+12V

+B3

+B3

AUX

IN

L-CH
R-CH

L-CH

R-CH

L-CH

R-CH

L-CH
R-CH

JK401

AUDIO

INPUT/OUTPUT

TERMINALS

MUTING

Q411
Q412

L-CH

R-CH

L-CH

R-CH

AMP

IC411
NJM4565D
VCR1 OUTPUT AMP.

5

6

2

3

4

8

A–12V A+12V

GRAPHIC EQUALIZER

L

L

L

R

R

R

VOLUME

VOLUME

IC501 LC75396N
AUDIO PROCESSOR

LT IN

RT IN

CENTER
REAR IN

FRONT

IN

L-CH

R

R

L-CH

L-CH
R-CH

R-CH

L-CH

DICECL

VSS

VDD

C-OUT

L-MIX OUT
R-MIX OUT

S-OUT

L-IN

R-IN

S-IN

C-IN

L-CHOUT

R-CHOUT

VCR1

VCR2

TUNER

AUX

VCR1

IN

VCR1
OUT

VCR2

IN

4

5

44

43 42

16

33

34

17

31

20
28

1845

46

47

26

6349

64

48

59

53

60

52

58

54

57

55

232425

56

3

2

1

30

A+12V

VCC

A+12V

GND

34
38

35
37

36

18

21

31

32

10 11

12

14

15

16

22

23

24

46 45

CLK

DATA

ENABLE

8

OSC

9

7

VREF

IC452

LV1035M

DOLBY
PRO LOGIC
DECORDER

L-IN

R-IN

S-IN

L-OUT

R-OUT

S-OUT

8

4

CENTER

OUT

L-CH
R-CH

REAR

OUT

A–12V

A+12V

3

IC561
NJM4558D
BUFFER

5

REAR
OUT

CENTER

7
1

L-CH

R-CH

L-CH

R-CH

IN

3
5

8

4

OUT

1
7

A–12V

IC581

NJM4558D

HEADPHONE AMP.

J581
HEADPHONES

A+12V

H-MUTE

4

OUT

A–12V

REAR

IN

CENTER

Q531
Q532

6

IN

SUB WOOFER

2

1 2 3

73 74

75
76
77
78
79
80
81
82
83
84
85
86
87
88

89
90
91
92
93
94
95
96
97
98
99
100

TUN-DO

TUN-DI

TUN-CK

P10

P11

P12

P15
P16
NC
NC
NC
NC
DAPD
ADPD
AC3-RES
AC3-SS
AC3-SI
D-SEL
AC3-SCK
SW-ON
PRO-EN

A

PRO-DI
PRO-CK
V-SW1
V-SW2
V-MUTE

STEREO

MUTE

VPP

X-BASS

HEAVY

SOFT

GND

BF201

1 2 3

BAND PASS

FILTER

X451

8MHz

7 6 5 4

2

1

1

11 10

9

VP

(AC)

Q5

IC431
NJM4558D
LOW PASS FILTER
AMP.

AM IF

P10

P11

P12

F1

F1

P14

P15

P16

NC(NP)

8

P13

P13

P14

3

NC(NP)

NC

NC

A OUT

X IN X OUT

BO 1

IO1

VDD

BO4

FM

VSS

FM IF

IN

L CH

R CH

AM
OSC

IF OUT

R-OUT

L-OUT

S-OUT

C-OUT

LT-IN

RT-IN

LF2C1

LF2C2

RF2C1

RF2C2

LFOUT

LF2C3

RFCOM

LFIN

LF1C1

RF1C1

LF1C2

RF1C2

LF1C3

RF1C3

RRIN LRIN

LROUT

RROUT

RFOUT

LFOUT

LSELO

RSELO

L1

R1
L2
R2

L4

R4

L3

R3

1

IC411

J581

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