HT-DP2500W
SERVICE MANUAL
No. S0884HTDP2500
HT-DP2500W
HT-DP2500W home theater system consisting of
HT-DP2500W home theater system, CP-F2500W,
CP-SW2500W, CP-C2500W and CP-SR2500W.
Manufactured under license from Dolby Laboratories Licensing Corporation.
DOLBY, the double-D symbol 
and "PRO LOGIC" are trademarks of Dolby Laboratories Licensing Corporation.
•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.
CONTENTS |
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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 |
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AC POWER SUPPLY CORD AND AC PLUG ADAPTOR |
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QACCE0008AW00 |
OPLGA0250AFZZ |
QACCL0005AW00
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SHARP CORPORATION |
This document has been published to be used |
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for after sales service only. |
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– 1 – |
The contents are subject to change without notice. |
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HT-DP2500W
SERVICE MANUAL
No. S0884HTDP2500
HT-DP2500W
HT-DP2500W home theater system consisting of
HT-DP2500W home theater system, CP-F2500W,
CP-SW2500W, CP-C2500W and CP-SR2500W.
Manufactured under license from Dolby Laboratories Licensing Corporation.
DOLBY, the double-D symbol 
and "PRO LOGIC" are trademarks of Dolby Laboratories Licensing Corporation.
•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.
CONTENTS |
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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 |
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AC POWER SUPPLY CORD AND AC PLUG ADAPTOR |
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QACCE0008AW00 |
OPLGA0250AFZZ |
QACCL0005AW00
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SHARP CORPORATION |
This document has been published to be used |
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for after sales service only. |
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– 1 – |
The contents are subject to change without notice. |
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HT-DP2500W
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.
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.
SPECIFICATIONS
HT-DP2500W
● General
Type: |
Home theater system |
Power source: |
AC 110/127/220/230 - 240 V, |
Power consumption: |
50/60 Hz |
105 W |
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Dimensions: |
Width; 430 mm (16-15/16") |
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Height; 116 mm (4-5/8") |
Weight: |
Depth; 322 mm (12-11/16") |
7.3 kg (16.1 lbs.) |
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Output power: |
(Front) |
(For Australia/ |
RMS; 50 W (25 W + 25 W) |
New Zealand) |
(10% T.H.D.) |
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(Centre) |
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RMS; 25 W (10% T.H.D.) |
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(Surround) |
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RMS; 25 W (total) (10% T.H.D.) |
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(Sub woofer) |
Output power: |
RMS; 25 W (10% T.H.D.) |
PMPO; 1,000 W |
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(Except for Australia/ |
(Front) |
New Zealand) |
RMS; 50 W (25 W + 25 W) |
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(10% T.H.D.) |
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(Centre) |
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RMS; 25 W (10% T.H.D.) |
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(Surround) |
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RMS; 25 W (total) (10% T.H.D.) |
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(Sub woofer) |
Output terminals: |
RMS; 25 W (10% T.H.D.) |
Front speakers; 8 ohms |
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Centre speaker; 8 ohms |
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Surround speakers; 16 ohms |
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Sub woofer; 8 ohms |
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Headphones; 16-50 ohms |
Input terminals: |
(recommended; 32 ohms) |
VCR-1, VCR-2, AUX (Audio sig- |
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nal); 500 mV/47 kohms |
● Tuner section
Frequency range: |
FM; 88-108 MHz |
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AM; 531-1,602 kHz |
CP-F2500W
● Front speaker section
Type: |
2-way, 10 cm (4") woofer, and 5 |
Maximum input |
cm (2") tweeter |
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power: |
50 W |
Rated input power: |
25 W |
Impedance: |
8 ohms |
Dimensions: |
Width; 150 mm (5-15/16") |
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Height; 200 mm (7-7/8") |
Weight: |
Depth; 125 mm (4-15/16") |
1.5 kg (3.3 lbs.)/each |
CP-C2500W
● Centre speaker section
Type: |
10 |
cm (4") full-range speaker |
Maximum input |
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power: |
50 |
W |
Rated input power: |
25 |
W |
Impedance: |
8 ohms |
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Dimensions: |
Width; 200 mm (7-7/8") |
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Height; 150 mm (5-15/16") |
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Weight: |
Depth; 125 mm (4-15/16") |
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1.3 kg (2.9 lbs.) |
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CP-SR2500W
● Surround speaker section
Type: |
10 cm (4") full-range speaker |
Maximum input |
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power: |
25 W |
Rated input power: |
12.5 W |
Impedance: |
16 ohms |
Dimensions: |
Width; 150 mm (5-15/16") |
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Height; 170 mm (6-3/4") |
Weight: |
Depth; 105 mm (4-3/16") |
1.0 kg (2.2 lbs.)/each |
CP-SW2500W
● Sub woofer section
Type: |
13 cm (5-1/8") woofer |
Maximum input |
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power: |
50 W |
Rated input power: |
25 W |
Impedance: |
8 ohms |
Dimensions: |
Width; 210 mm (8-5/16") |
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Height; 310 mm (12-1/4") |
Weight: |
Depth; 310 mm (12-3/16") |
4.2 kg (9.3 lbs.) |
Specifications for this model are subject to change without prior notice.
– 2 –
HT-DP2500W
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.
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.
SPECIFICATIONS
HT-DP2500W
● General
Type: |
Home theater system |
Power source: |
AC 110/127/220/230 - 240 V, |
Power consumption: |
50/60 Hz |
105 W |
|
Dimensions: |
Width; 430 mm (16-15/16") |
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Height; 116 mm (4-5/8") |
Weight: |
Depth; 322 mm (12-11/16") |
7.3 kg (16.1 lbs.) |
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Output power: |
(Front) |
(For Australia/ |
RMS; 50 W (25 W + 25 W) |
New Zealand) |
(10% T.H.D.) |
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(Centre) |
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RMS; 25 W (10% T.H.D.) |
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(Surround) |
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RMS; 25 W (total) (10% T.H.D.) |
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(Sub woofer) |
Output power: |
RMS; 25 W (10% T.H.D.) |
PMPO; 1,000 W |
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(Except for Australia/ |
(Front) |
New Zealand) |
RMS; 50 W (25 W + 25 W) |
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(10% T.H.D.) |
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(Centre) |
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RMS; 25 W (10% T.H.D.) |
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(Surround) |
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RMS; 25 W (total) (10% T.H.D.) |
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(Sub woofer) |
Output terminals: |
RMS; 25 W (10% T.H.D.) |
Front speakers; 8 ohms |
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Centre speaker; 8 ohms |
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Surround speakers; 16 ohms |
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Sub woofer; 8 ohms |
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Headphones; 16-50 ohms |
Input terminals: |
(recommended; 32 ohms) |
VCR-1, VCR-2, AUX (Audio sig- |
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nal); 500 mV/47 kohms |
● Tuner section
Frequency range: |
FM; 88-108 MHz |
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AM; 531-1,602 kHz |
CP-F2500W
● Front speaker section
Type: |
2-way, 10 cm (4") woofer, and 5 |
Maximum input |
cm (2") tweeter |
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power: |
50 W |
Rated input power: |
25 W |
Impedance: |
8 ohms |
Dimensions: |
Width; 150 mm (5-15/16") |
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Height; 200 mm (7-7/8") |
Weight: |
Depth; 125 mm (4-15/16") |
1.5 kg (3.3 lbs.)/each |
CP-C2500W
● Centre speaker section
Type: |
10 |
cm (4") full-range speaker |
Maximum input |
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power: |
50 |
W |
Rated input power: |
25 |
W |
Impedance: |
8 ohms |
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Dimensions: |
Width; 200 mm (7-7/8") |
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Height; 150 mm (5-15/16") |
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Weight: |
Depth; 125 mm (4-15/16") |
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1.3 kg (2.9 lbs.) |
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CP-SR2500W
● Surround speaker section
Type: |
10 cm (4") full-range speaker |
Maximum input |
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power: |
25 W |
Rated input power: |
12.5 W |
Impedance: |
16 ohms |
Dimensions: |
Width; 150 mm (5-15/16") |
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Height; 170 mm (6-3/4") |
Weight: |
Depth; 105 mm (4-3/16") |
1.0 kg (2.2 lbs.)/each |
CP-SW2500W
● Sub woofer section
Type: |
13 cm (5-1/8") woofer |
Maximum input |
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power: |
50 W |
Rated input power: |
25 W |
Impedance: |
8 ohms |
Dimensions: |
Width; 210 mm (8-5/16") |
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Height; 310 mm (12-1/4") |
Weight: |
Depth; 310 mm (12-3/16") |
4.2 kg (9.3 lbs.) |
Specifications for this model are subject to change without prior notice.
– 2 –
HT-DP2500W
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 |
2 |
3 |
4 |
5 |
6 7 8 9 10 |
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– 3 –
HT-DP2500W
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CP-F2500W |
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CP-C2500W |
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Front Speaker |
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Center Speaker |
1. |
Tweeter |
1. |
Woofer |
2. |
Woofer |
2. |
Speaker Cord |
3. |
Speaker Cord |
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1 |
1 |
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2 |
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3
CP-SR2500W
2
CP-SW2500W
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Surround Speaker |
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Sub woofer |
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1. |
Woofer |
1. |
Woofer |
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2. |
Speaker Cord |
2. |
Bass Reflex Duct |
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3. |
Speaker Cord |
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1
1
2
3
2
OPERATION MANUAL
PREPARATION FOR USE
0.2 m - 6 m |
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(8" - 20') |
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15˚ |
15˚ |
■ 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 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.
– 4 –
HT-DP2500W
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CP-F2500W |
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CP-C2500W |
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Front Speaker |
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Center Speaker |
1. |
Tweeter |
1. |
Woofer |
2. |
Woofer |
2. |
Speaker Cord |
3. |
Speaker Cord |
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1 |
1 |
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2 |
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3
CP-SR2500W
2
CP-SW2500W
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Surround Speaker |
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Sub woofer |
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1. |
Woofer |
1. |
Woofer |
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2. |
Speaker Cord |
2. |
Bass Reflex Duct |
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3. |
Speaker Cord |
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1
1
2
3
2
OPERATION MANUAL
PREPARATION FOR USE
0.2 m - 6 m |
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(8" - 20') |
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15˚ |
15˚ |
■ 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 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.
– 4 –
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HT-DP2500W |
(Continued) |
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■ AM/FM Interval (span) |
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The International Telecommunication Union (ITU) has estab- |
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lished that member countries should maintain either a 10 |
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kHz or a 9 kHz interval between broadcasting frequencies |
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of any AM station. The illustration shows the 9 kHz interval |
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zones (regions 1 and 3), and the 10 kHz interval zone (region |
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2). |
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This product is not equipped with a span selector. However, |
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it will be adjusted to 9 kHz AM interval (50 kHz FM interval) |
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when shipped from the factory. |
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Before using the unit, be sure to set it for the AM tuning |
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interval (span) used in your area. |
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To check the tuning span currently selected: |
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1 |
Set the ON/STAND-BY button on the main unit to ON. |
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2 |
Press the TUNER (BAND) button until "FM" or "AM" ap- |
ON/STAND-BY |
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pears in the display. |
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3 |
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Press the TUNER (BAND) button to select the AM band. |
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● If "AM 531 kHz" is displayed, it means that the radio has |
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been adjusted for a 9 kHz span. If "AM 530 kHz" is dis- |
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played, it means that the radio has been adjusted for a |
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10 kHz span. |
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To change from a 9 kHz AM (50 kHz FM) interval to a |
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TUNER (BAND) |
ENTER |
10 kHz AM (100 kHz FM) interval: |
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1 |
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Press the ON/STAND-BY button on the remote control |
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to enter the stand-by mode. |
ON/ |
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2 |
Hold down the TUNER (BAND) button and the ENTER |
STAND-BY |
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button for at least 4 seconds. Release the buttons when |
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"AM SP 10 kHz" and "FM SP 100 kHz" are displayed |
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alternately. |
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To return to a 9 kHz AM (50 kHz FM) interval: |
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1 |
Press the ON/STAND-BY button on the remote control |
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to enter the stand-by mode. |
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2 |
Hold down the TUNER (BAND) button and the ENTER |
[9 kHz → 10 kHz] |
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button for at least 4 seconds. Release the buttons when |
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"AM SP 9 kHz" and "FM SP 50 kHz" are displayed al- |
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ternately. |
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Caution: |
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(4 seconds) |
● When the unit is left for a few hours after the span has |
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been switched and AC power lead disconnected, it will |
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be automatically returned to a 9 kHz span. If this hap- |
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pens, set the span again. |
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● When the span is switched, any stations that are |
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memorised will be cancelled. |
[10 kHz → 9 kHz] |
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(4 seconds) |
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– 5 –
HT-DP2500W
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.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.
HT-DP2500W
STEP |
REMOVAL |
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PROCEDURE |
FIGURE |
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1 |
Top Cabinet |
1. Screw ................. |
(A1) x5 |
6-1 |
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2 |
Rear Panel |
1. |
Screw ............... |
(B1) x11 |
6-1 |
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3 |
Front Panel |
1. |
Screw ................. |
(C1) x5 |
6-2 |
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2. |
Flat Cable ........... |
(C2) x1 |
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3. |
Socket ................ |
(C3) x3 |
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4 |
Main PWB/ |
1. |
Screw ................. |
(D1) x7 |
6-2 |
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Tuner PWB |
2. |
Socket ................ |
(D2) x3 |
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5 |
Power Supply PWB |
1. Screw ................. |
(E1) x5 |
6-2 |
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(With Voltage Selector |
2. |
Socket ................ |
(E2) x3 |
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Switch PWB) |
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6 |
Display PWB |
1. Knob ................... |
(F1) x1 |
6-3 |
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2. |
Nut ...................... |
(F2) x1 |
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3. |
Screw ............... |
(F3) x10 |
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4. |
Socket ................ |
(F4) x1 |
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5. |
Knob ................... |
(F5) x1 |
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7 |
Switch PWB |
1. |
Screw ................ |
(G1) x2 |
6-3 |
8 |
Headphones PWB |
1. |
Screw ................ |
(H1) x1 |
6-3 |
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CP-F2500W
STEP |
REMOVAL |
PROCEDURE |
|
FIGURE |
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|
1 |
Speaker |
1. Net ........................ |
(A1) x1 |
7-1 |
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2. Screw .................... |
(A2) x6 |
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|
CP-SW2500W
STEP |
REMOVAL |
PROCEDURE |
|
FIGURE |
|
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1 |
Speaker |
1. Net ........................ |
(A1) x1 |
7-2 |
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2. Screw .................... |
(A2) x4 |
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CP-C2500W
STEP |
REMOVAL |
PROCEDURE |
|
FIGURE |
|
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|
1 |
Speaker |
1. Net ........................ |
(A1) x1 |
7-3 |
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2. Screw .................... |
(A2) x4 |
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CP-SR2500W
STEP |
REMOVAL |
PROCEDURE |
|
FIGURE |
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|
1 |
Speaker |
1. Net ........................ |
(A1) x1 |
7-4 |
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2. Screw .................... |
(A2) x4 |
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HT-DP2500W
Top Cabinet
(A1)x2
ø3x10mm
Front Panel
(A1)x1 Rear ø3x10mm Panel
Voltage Selector |
(B1)x11 |
(A1)x2 |
|
Switch PWB |
|||
ø3x10mm |
ø3x10mm |
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Figure 6-1 |
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(D1)x4 |
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(C1)x1 |
(C3)x1 |
ø 3x8mm Front Panel |
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(C2)x1 |
Power Amp. PWB |
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(D1)x3 |
ø 3x8mm |
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ø 3x8mm |
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Headphones |
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(E2)x2 |
PWB |
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(D2)x1 |
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(C3)x1 |
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(D2)x2 |
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(E2)x1 |
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Tuner |
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PWB |
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Main |
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(C1)x1 |
PWB |
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ø 3x8mm |
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(E1)x5 |
Power Supply |
|
ø 3x8mm |
PWB |
(C3)x1 |
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(C1)x3 |
ø 3x8mm
Figure 6-2
Display PWB
Front Panel (F5)x1
(F1)x1
(F2)x1
(F4)x1
Switch PWB
(F3)x10 ø3x10mm (G1)x2
ø3x10mm
HeadphonesPWB (H1)x1 
ø3x10mm 
PWB Washer
Figure 6-3
– 6 –
CP-F2500W
Top Side
(A1)x1 Tweeter
(A2)x2
ø4x13mm
(A2)x4
ø4x13mm
Woofer
Screw
Driver
Figure 7-1
CP-SW2500W
Woofer
(A2)x4
ø4x13mm
(A1)x1
Screw
Driver
Figure 7-2
HT-DP2500W
CP-C2500W
Top Side
(A1)x1
(A2)x4
ø4x13mm
Woofer
Speaker Box
Speaker Box
Screw
Driver
Figure 7-3
CP-SR2500W
Top Side
Top Side
(A1)x1 (A2)x4 ø4x13mm
Woofer
Speaker Box
Speaker Box
Screw
Driver
Figure 7-4
– 7 –
HT-DP2500W
ADJUSTMENT
TUNER SECTION
fL: Low-range frequency fH: High-renge frequency
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Test Stage |
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Frequency |
Frequency |
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Setting/ |
Instrument |
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Display |
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Adjusting |
Connection |
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Parts |
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Band |
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— |
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87.50 kHz |
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(fL): L202 |
*1 |
Coverage |
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3.4 ± 0.1 V |
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RF |
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98 MHz |
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98.00 MHz |
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L201 |
*2 |
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(10 - 30 dB) |
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*1. Input: Antenna, |
Output: TP302 |
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*2. Input: Anetnna, |
Output: Speaker Terminal |
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• AM IF/RF |
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Signal generator: 400 Hz, 30%, AM modulated |
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Test Stage |
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Frequency |
Frequency |
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Setting/ |
Instrument |
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Display |
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Adjusting |
Connection |
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Parts |
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IF |
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450 kHz |
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1,602 kHz |
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T204 |
*1 |
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Band |
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— |
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531 kHz |
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(fL): T203 |
*2 |
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(AM Band |
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Coverage |
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0.8V±0.1v |
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Tracking |
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990 kHz |
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990 kHz |
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T201 |
*1 |
*1. Input: Antenna, |
Output: TP301 |
|
|||||
*2. Input: Input is not connected, |
Output: TP302 |
||||||
• FM Detection
Signal generator: 10.7 MHz, FM sweep
Test Stage |
Frequency |
Frequency |
Setting/ |
Instrument |
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Display |
Adjusting |
Connection |
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Parts |
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IF |
10.7 MHz |
98.00 MHz |
T202 |
Input: Pin 1 |
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(Turn the |
of IC201 |
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core of T202 |
Output: |
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fully counter- |
Pin 1of |
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clockwise) |
IC203 |
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• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency |
Frequency |
Adjusting |
Instrument |
|
Display |
Parts |
Connection |
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98.0 MHz |
98.00 MHz |
VR201 *1 |
Input: SOC201 |
(25 dBμV) |
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Output: Speaker |
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Terminal |
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*1. Adjust so that an output signal appears.
• 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. |
|
FM |
Preset No. |
AM |
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1 |
87.50 |
MHz |
6 |
531 kHz |
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2 |
108.00 |
MHz |
7 |
1,602 kHz |
|
||
3 |
98.00 |
MHz |
8 |
990 kHz |
|
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4 |
90.00 |
MHz |
9 |
603 kHz |
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5 |
106.00 |
MHz |
10 |
1,404 kHz |
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11~40 |
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AM TRACKING |
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T203 |
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TP301 |
SOC201 |
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ANTENNA |
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TERMINAL |
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24 |
13 |
R223 |
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T201 |
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AM BAND |
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IC203 |
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COVERAGE |
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1 |
12 |
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R216 |
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FM MUTE |
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AM IF |
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LEVEL |
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TP302 |
FM IF |
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T202 |
L202 |
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L201 |
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VR201 |
T204 |
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FM RF |
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1 |
IC201 |
FM BAND |
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COVERAGE |
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TUNER PWB
Figure 8 ADJUSTMENT POINTS
– 8 –
HT-DP2500W
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.
Distortion clip point
X |
|
|
SP output |
|
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|
level |
0w |
|
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|
A |
10 minutes |
C |
D |
B |
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.
B ~ C :
Data is fetched every 4 seconds to control.
C ~ D :
Initial frequency
characteristics.
If hight energy exceeding X
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.
When output exceeding X is not given |
|
|
|
When quiet music is played back. |
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||
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||
continuously for 10 minutes. |
|
|
When VOL is lowered. |
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|||
When the power is turned off or on. |
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|
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
REF. NO |
DESCRIPTION |
POSITION |
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SW1 |
ON STAND-BY |
ON—OFF |
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SW2 |
TIMER/SLEEP |
ON—OFF |
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SW3 |
DOLBY PRO LOGIC |
ON—OFF |
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SW4 |
EQUALIZER |
ON—OFF |
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SW5 |
X-BASS |
ON—OFF |
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SW6 |
ENTER |
ON—OFF |
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SW7 |
VOLUME DOWN |
ON—OFF |
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SW8 |
VOLUME UP |
ON—OFF |
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SW9 |
MEMORY/SET |
ON—OFF |
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•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.
REF. NO |
DESCRIPTION |
POSITION |
|
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|
SW10 |
TUNING UP |
ON—OFF |
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|
SW11 |
TUNING DOWN |
ON—OFF |
SW12 |
TUNER(BAND) |
ON—OFF |
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SW13 |
CD/AUX |
ON—OFF |
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SW14 |
VCR-2 |
ON—OFF |
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SW15 |
VCR-1 |
ON—OFF |
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SW23 |
JOG DIAL |
ON—OFF |
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SW601 |
VOLTAGE SELECTOR |
110V |
|
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|
– 9 –
HT-DP2500W
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.
Distortion clip point
X |
|
|
SP output |
|
|
|
level |
0w |
|
|
|
A |
10 minutes |
C |
D |
B |
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.
B ~ C :
Data is fetched every 4 seconds to control.
C ~ D :
Initial frequency
characteristics.
If hight energy exceeding X
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.
When output exceeding X is not given |
|
|
|
When quiet music is played back. |
|
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|
||
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|
||
continuously for 10 minutes. |
|
|
When VOL is lowered. |
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|
|||
When the power is turned off or on. |
|
|
|
|
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
REF. NO |
DESCRIPTION |
POSITION |
|
|
|
SW1 |
ON STAND-BY |
ON—OFF |
|
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|
SW2 |
TIMER/SLEEP |
ON—OFF |
|
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SW3 |
DOLBY PRO LOGIC |
ON—OFF |
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SW4 |
EQUALIZER |
ON—OFF |
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SW5 |
X-BASS |
ON—OFF |
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SW6 |
ENTER |
ON—OFF |
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SW7 |
VOLUME DOWN |
ON—OFF |
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SW8 |
VOLUME UP |
ON—OFF |
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SW9 |
MEMORY/SET |
ON—OFF |
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|
•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.
REF. NO |
DESCRIPTION |
POSITION |
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|
SW10 |
TUNING UP |
ON—OFF |
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SW11 |
TUNING DOWN |
ON—OFF |
SW12 |
TUNER(BAND) |
ON—OFF |
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SW13 |
CD/AUX |
ON—OFF |
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SW14 |
VCR-2 |
ON—OFF |
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SW15 |
VCR-1 |
ON—OFF |
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SW23 |
JOG DIAL |
ON—OFF |
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SW601 |
VOLTAGE SELECTOR |
110V |
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– 9 –
HT-DP2500W |
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+B3 |
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+B3 |
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BAND PASS |
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IF AMP |
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CF202 |
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MUTING |
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FILTER |
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IC201 |
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FM IF |
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FM |
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FM IF |
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1 BF201 3 |
1 |
FM FRONT END |
9 |
Q281 |
CF201 |
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AM IF |
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AM IF |
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Q202 |
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NC(NP) |
NC(NP) |
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GND |
2 |
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TA7358AP |
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T204 |
CF203 |
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TUNER |
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P16 |
P15 |
P14 |
P13 |
P12 |
P11 |
P10 |
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AM |
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8 IF |
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FM IF IN |
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F1 |
F1 |
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SOC201 |
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3 |
4 |
2 5 |
6 |
7 |
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MUTE |
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OSC VT |
FM |
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1 |
2 |
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3 |
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4 |
5 |
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8 |
9 |
17 |
18 |
19 |
16 |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
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ANTENNA |
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FM IF AM MIX REQ |
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AM IF GND |
FM VCC |
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FM |
AM MPX |
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TERMINAL |
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15 |
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L202 |
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IN |
OUT |
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DET |
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OUT OUT |
IN |
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VP |
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L201 |
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FM OSC |
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VR201 |
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IC203 |
LA1833 |
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(AC) |
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FM RF |
T202 |
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FM MUTE LEVEL AM |
AM |
FM IF DET./FM MPX./AM IF |
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P13 |
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FM IF |
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OSC OSC |
L CH R CH |
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75 74 73 |
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24 |
23 |
22 |
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21 |
7 |
6 |
10 |
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11 |
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12 |
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13 14 |
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P14 |
76 |
P12 |
P11 |
P10 |
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FM IF |
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AFC |
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STEREO |
SD |
IF OUT |
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PHASE |
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L-CH R-CH |
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77 |
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AMP |
FMOSC |
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78 |
P15 |
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Q201 |
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MPX |
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79 |
P16 |
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80 |
NC |
||||||||||||
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OUT |
IN |
RFAMIN |
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AM/FM VCO |
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81 |
NC |
|||||||||||||||||
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AM RF |
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CUT |
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82 |
NC |
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AM ANTENNA |
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AM OSC. |
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STEREO |
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SD |
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83 |
NC |
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||||||||
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84 |
DAPD |
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||||||||||||
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+B3 |
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|||||||||
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T201 |
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T203 |
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85 |
ADPD |
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|||||
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VOLTAGE |
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||||||||||
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86 |
AC3-RES |
||||||||||
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REGURATER |
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|||||||||
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||||||
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A+12V |
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87 |
AC3-SS |
|||||
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88 |
AC3-SI |
||
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X202 |
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+B3 |
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89 |
D-SEL |
|||
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IN |
IN |
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IN |
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90 |
AC3-SCK |
|||||
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4.5MHz |
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|||||||||
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VT |
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IO1 |
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91 |
SW-ON |
||||||||
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AM |
FM |
|
IF |
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||||||
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+B |
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1 |
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+5V |
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92 |
PRO-ENA |
||||||||
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22 |
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|||||||||
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A+12V |
20 |
15 |
16 |
11 |
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12 |
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17 |
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93 |
PRO-DI |
|||||||||
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FM |
|
FM |
A OUT |
X IN |
X OUT |
IC202 |
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VDD |
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94 |
PRO-CK |
||||||
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Q203 |
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OSC |
LC72131 |
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||||||
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7 BO 1 |
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BO4 10 |
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95 |
V-SW1 |
|||||||||||
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PLL CONTROLLER |
VSS |
|
FM |
9 |
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Q5 |
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96 |
V-SW2 |
||||||||||
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3 4 5 |
6 |
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21 |
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97 |
V-MUTE |
|||
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CE DI CL |
DO |
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NC 98 |
TUN-DI |
TUN-DO |
TUN-CK |
|||
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NC 99 |
||||||||
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VPP 100 |
||||||||
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1 |
2 |
3 |
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IC581 |
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NJM4558D |
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||
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HEADPHONE AMP. |
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|||||
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HEAVY |
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A+12V |
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|||||
JK401 |
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IN |
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OUT |
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||||||
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SOFT |
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8 |
|
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J581 |
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|||||||||
AUDIO |
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||||||||||||
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L-CH 3 |
|
1 |
L-CH |
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|||||||
INPUT/OUTPUT |
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|
IC411 |
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|||||||
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DI CE |
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|
H-MUTE |
R-CH 5 |
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||||||
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CL |
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A+12V |
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7 R-CH |
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||||||||||
TERMINALS |
|
|
|
NJM4565D |
|
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44 4 |
|
43 5 34 |
42 16 33 |
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4 |
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||||||||||||||
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23 24 25 |
56 |
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Q531 |
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|||||||||||||||
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|
VCR1 OUTPUT AMP. |
|
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|
J581 |
|
|
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|
|
||||||||||||||||||
VCR1 |
L-CH |
|
|
|
VCR1 L-CH 55 L1 |
|
|
VDD |
|
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|
|
|
LF2C1 |
RF2C1 |
|
LF2C2 RF2C2 |
LFOUT |
LF2C3 |
RFCOM LFIN |
|
|
Q532 |
A–12V |
|
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|||||||||||||
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|
LFOUT 31 L-CH |
|
|
HEADPHONES |
|
|||||||||||||||||||||
IN |
R-CH |
|
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|
R 57 |
R1 |
|
|
|
IC501 LC75396N |
|
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|||||||||||||||||
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|
VCR2 L-CH 54 L2 |
|
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|
RFOUT |
17 |
R-CH |
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||||||||||||||||
|
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|
|
AUDIO PROCESSOR |
IC561 |
|
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|
|
||||||||||||||||||||||
|
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|
TUNER R 58 |
R2 |
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|
||||||||||||||||||||
|
|
MUTE |
|
|
|
|
IC411 |
L-CH |
L-CH 52 L4 |
|
|
|
|
|
|
|
GRAPHIC EQUALIZER |
|
VOLUME |
|
|
|
NJM4558D |
|
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|
|
|||||||||||||||
|
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|
3 |
R-CH 60 R4 |
|
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BUFFER |
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VCR1 |
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AMP |
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RROUT |
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5 |
AUX L-CH 53 L3 |
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VOLUME |
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OUT |
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R-CH |
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LSELO |
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MUTING |
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48 64 |
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47 1 |
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A–12V A+12V |
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LT IN RT IN |
L-CHOUT |
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L-CH |
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VCR2 |
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IN |
R-CH |
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X-BASS |
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1 |
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IN 6 |
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2 SUB WOOFER |
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4 |
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OUT |
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AUX |
L-CH |
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IC431 |
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A–12V |
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IN |
R-CH |
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L-IN |
R-IN |
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NJM4558D |
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45 46 |
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LOW PASS FILTER |
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34 |
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LT-IN |
RT-IN |
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38 CLK |
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AMP. |
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35 |
DATA |
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IC452 |
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C-OUT 9 C-OUT |
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37 |
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36 ENABLE |
LV1035M |
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A+12V |
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18 |
VCC |
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DOLBY |
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8 |
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PRO LOGIC |
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7 VREF |
DECORDER |
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L-OUT 24 |
L-MIX OUT |
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OUT-S OUT-R OUT-L |
IN-L IN-R IN-S |
R-OUT 23 |
R-MIX OUT |
21 GND |
OSC |
S-OUT 22 |
S-OUT |
||
31 |
32 |
10 11 12 |
14 15 16 |
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|
X451
8MHz
Figure 10 BLOCK DIAGRAM (1/2)
– 10 –
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