Sharp HT-DP2500 User Manual
HT-DP2500
SERVICE MANUAL
No. S7859HTDP2500
HT-DP2500
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
Page
IMPORTANT SERVICE NOTES............................................................................................................................................. 2
SPECIFICATIONS ................................................................................................................................................................. 2
NAMES OF PARTS ............................................................................................................................................................... 3
REMOTE CONTROL ............................................................................................................................................................. 4
DISASSEMBLY...................................................................................................................................................................... 5
ADJUSTMENT ...................................................................................................................................................................... 7
NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................... 9
TYPES OF TRANSISTOR AND LED...................................................................................................................................... 9
BLOCK DIAGRAM ............................................................................................................................................................... 10
SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD................................................................................................... 12
FUNCTION TABLE OF IC.................................................................................................................................................... 24
FL SEGMENT ...................................................................................................................................................................... 29
PARTS GUIDE/EXPLODED VIEW
PACKING OF THE SET
SHARP CORPORATION
– 1 –
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
HT-DP2500
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
IMPORTANT SERVICE NOTES
BEFORE RETURNING THE AUDIO PRODUCT
(Fire & Shock Hazard)
Before returning the audio product to the user, perform the
following safety checks.
1. Inspect all lead dress to make certain that leads are not
pinched or that hardware is not lodged between the chassis and other metal parts in the audio product.
2. Inspect all protective devices such as insulating materials,
cabinet, terminal board, adjustment and compartment covers or shields, mechanical insulators etc.
3. To be sure that no shock hazard exists, check for leakage
current in the following manner.
* Plug the AC line cord directly into a 120 volt AC outlet.
* Using two clip leads, connect a 1.5k ohm, 10 watt resistor
paralleled by a 0.15µF capacitor in series with all exposed
metal cabinet parts and a known earth ground, such as
conduit or electrical ground connected to earth ground.
* Use a VTVM or VOM with 1000 ohm per volt, or higher,
sensitivity to measure the AC voltage drop across the
resistor (See diagram).
* Connect the resistor connection to all exposed metal parts
having a return path to the chassis (antenna, metal cabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.
VTVM
AC SCALE
1.5k ohms
10W
0.15 µ F
TO EXPOSED
METAL PARTS
TEST PROBE
CONNECT TO
KNOWN EARTH
GROUND
All check must be repeated with the AC line cord plug connection reversed.
Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.
SPECIFICATIONS
HT-DP2500
General
Type: Home theater receiver
Power source: AC 120 V, 60 Hz
Power consumption: 110 W
Dimenslons: Width; 16-15/16" (430 mm)
Height; 4-5/8" (116 mm)
Depth; 12-11/16"
Weight: 14.8 lbs. (6.7 kg)
Output power: (Front)
25 watts minimum RMS per channel into 8
ohms from 100 Hz to 20 kHz, 10 % total
harmonic distortion.
(Center)
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
Center 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 signal);
500 mV/47 kohms
Tuner section
Frequency range: FM; 87.5 - 108 MHz
AM; 530 - 1,720 kHz
CP-F2500
Front speaker section
Type: 2-way, 4" (10 cm) woofer, and 2" (5 cm)
tweeter
Maximum Input power: 50 W
Impedance: 8 ohms
Dimensions: Width; 5-15/16" (150 mm)
Height; 7-7/8" (200 mm)
Depth; 4-15/16" (125 mm)
Weight: 3.3 lbs. (1.5 kg)/each
CP-C2500
Center speaker section
Type: 4" (10 cm) full-range speaker
Maximum Input power: 50 W
Impedance: 8 ohms
Dimensions: Width; 7-7/8" (200 mm)
Height; 5-15/16" (150 mm)
Depth; 4-15/16" (125 mm)
Weight: 2.9 lbs. (1.3 kg)
CP-SR2500
Surround speaker section
Type: 4" (10 cm) full-range speaker
Maximum Input power: 25 W
Impedance: 16 ohms
Dimensions: Width; 5-15/16" (150 mm)
Height; 6-3/4" (170 mm)
Depth; 4-3/16" (105 mm)
Weight: 2.2 lbs. (1.0 kg)/each
CP-SW2500
Sub woofer section
Type: 5-1/8" (13 cm) full-range speaker
Maximum Input power: 50 W
Impedance: 8 ohms
Dimensions: Width; 8-5/16" (210 mm)
Height; 12-1/4" (310 mm)
Depth; 12-3/16" (310 mm)
Weight: 9.3 lbs. (4.2 kg)
Specifications for this model are subject to change without
prior notice.
– 2 –
HT-DP2500
Front Panel
1. Power Switch
2. Remote Control Sensor
3. Stand-by Indicator
4. Timer Indicator
5. Display Panel
6. Dolby Pro Logic Button
7. Eqalizer Button
8. Extra Bass Button: X-BASS
9. Volume Conrol
10. Headphones Socket
11. VCR-1 Button
12. VCR-2 Button
13. Aux Button
14. Tuner (Band) Button
15. Tuning Down Button
16. Tuning Up Button
17. Memory Button
18. Timer/ Sleep Button
19. Jog Dial
20. Enter Button
21. Sub Woofer Volume Control
Rear Panel
NAMES OF PARTS
1
10
22
23
24
25 26 27 28
3
2
11 1213
54
7 98
6
14151617 18
HT-DP2500
19
20
21
29
22. AM Antenna Terminal
23. Antenna Ground Terminal
24. FM Antenna Terminal
25. VCR-1 Input/Output Sockets
26. VCR-2/Aux Input Sockets
27. Surround Speaker Socket
28. Front/Center Speaker/Sub Woofer Socket
29. AC Power Cord
Remote Control
1. Remote Control Transmitter LED
2. Power Button
3. VCR-2 Button
4. VCR-1 Button
5. Preset Balance Button
6. Dolby Pro Logic Button
7. Test Tone Button
8. Tuner (Band) Button
9. Mute Button
10. Aux Button
11. Balance Buttons:
12. Eqalizer Button
13. Extra Bass Button: X-BASS
14. Center level Buttons:
15. Surround level Buttons:
16. Preset Up/Down Buttons:
17. Volume Up/Down Buttons:
2
3
4
5
6
7
8
9
1
10
11
12
13
14
15
16
17
– 3 –
HT-DP2500
CP-F2500
1. Tweeter
2. Woofer
3. Speaker Cord
CP-SR2500
1. Woofer
2. Speaker Cord
CP-C2500
1. Woofer
2. Speaker Cord
1
1
2
2
3
CP-SW2500
1. Woofer
2. Bass Reflex Duct
3. Speaker Cord
1
2
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.
1
2
8" - 20'
(0.2 m - 6 m)
15˚
3
15˚
– 4 –
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3. Take off nylon bands or wire holders where they need be
removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.
4. Take suff cient care on static electricity of integrated
circuits and other circuits when servicing.
HT-DP2500
REMOVAL PROCEDURESTEP FIGURE
1 Top Cabinet 1. Screw ................. (A1) x5 5-1
2 Rear Panel 1. Screw ................. (B1) x9 5-1
3
Front Panel
4 Main PWB/ 1. Screw ................. (D1) x7 5-2
Tuner PWB 2. Socket ................ (D2) x1
5 Power A PWB 1. Screw ................. (E1) x4 5-2
6 Jog Dial 1. Knob ................... (F1) x1 5-3
7 Display PWB 1. Screw .................(G1) x9 5-3
8 Switch PWB 1. Screw ................ (H1) x2 5-3
9
Headphones PWB
CP-F2500
STEP
1 Woofer/Tweeter 1. Net ........................ (A1) x1 6-1
REMOVAL
CP-SW2500
STEP
1 Speaker 1. Net ........................ (A1) x1 6-2
REMOVAL PROCEDURE
1. Screw ................. (C1) x5 5-2
2. Flat Cable...........(C2) x1 5-3
3. Socket ................ (C3) x3
2. Screw ................. (E2) x2
3. Screw ................. (E3) x1
2. Nut...................... (F2) x1
2. Socket ................(G2) x1
3. Knob ...................(G3) x1
1. Screw ................. (J1) x1 5-3
PROCEDURE
2. Screw .................... (A2) x6
2. Screw .................... (A2) x4
FIGURE
FIGURE
(A1)x2
ø3x10mm
(A1)x1
ø3x10mm
(D1)x3
ø3x8mm
Tuner
PWB
Main
PWB
(E1)x4
ø3x8mm
HT-DP2500
(C1)x1
ø3x8mm
(E3)x1
ø3x10mm
Display
PWB
Top Cabinet
Rear panle
Power
PWB
Front
Panel
(B1)x9
ø3x10mm
Figure 5-1
(D1)x4
ø3x8mm
(C3)x1
Figure 5-2
(G3)x1
HT-DP2500
Front Panel
(A1)x2
ø3x10mm
(C2)x1
(E2)x2
(D2)x1
Front
Panel
(C1)x1
ø3x8mm
(C3)x1
(C1)x3
ø3x8mm
CP-C2500
STEP REMOVAL PROCEDURE
1 Speaker 1. Net ........................ (A1) x1 6-3
2. Screw .................... (A2) x4
FIGURE
CP-SR2500
STEP
1 Speaker 1. Net ........................ (A1) x1 6-4
REMOVAL
PROCEDURE FIGURE
2. Screw .................... (A2) x4
– 5 –
(G1)x10
ø3x10mm
(H1)x2
ø3x10mm
(J1)x1
ø3x10mm
Figure 5-3
(F1)x1
(F2)x1
PWB
Washer
(G2)x1
Switch PWB
(C3)x1
Headphones
PWB
HT-DP2500
CP-F2500
(A1)x1
(A2)x2
ø4x13mm
(A2)x4
ø4x13mm
Screw
Driver
Figure 6-1
CP-C2500
(A1)x1
(A2)x4
ø4x13mm
Screw
Driver
Figure 6-3
CP-SW2500
(A2)x4
ø4x13mm
(A1)x1
Screw
Driver
CP-SR2500
(A1)x1
(A2)x4
ø4x13mm
Screw
Driver
– 6 –
Figure 6-4Figure 6-2
ADJUSTMENT
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Test Stage
Frequency
Frequency
Display
Band — 87.5 kHz (fL): L202 *1
Coverage 3.4 ± 0.1 V
RF 98 MHz 98.0 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
Frequency
IF 10.7 MHz 98.0 MHz T202 Input: Pin 1
Frequency
Display
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage
Frequency
IF 450 kHz 1,702 kHz T204 *1
Band — 530 kHz (fL): T203 *2
Tracking 990 kHz 990 kHz T201 *1
Frequency
Display
*1. Input: Antenna, Output: TP301
*2. Input: Input is not connected, Output: TP302
Setting/
Adjusting
Parts
Setting/
Adjusting
Parts
Instrument
Connection
Instrument
Connection
(Turn the of IC201
core of T202 Output:
fully counter- Pin 1of
clock wise) IC203
Setting/
Adjusting
Parts
Instrument
Connection
(AM Band
Coverage
0.8V±0.1v
HT-DP2500
• 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 6 530 kHz
2 108.00 MHz 7 1,720 kHz
3 98.00 MHz 8 990 kHz
4 90.00 MHz 9 600 kHz
5 106.00 MHz 10 1,400 kHz
11~40
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency Adjusting
98.0 MHz 98.0 MHz VR201 *1 Input: SOC201
(25 dBµV) Output: Speaker
*1. Adjust so that an output signal appears.
FM Preset No.
Frequency
Display
Parts
AM
Instrument
Connection
Terminal
SOC201
ANTENNA
TERMINAL
AM TRACKING
T201
R216
TP302
FM RF
L201
1
AM BAND
COVERAGE
T203
VR201
FM MUTE
LEVEL
IC201
FM IF
T202
L202
FM BAND
COVERAGE
Figure 7 ADJUSTMENT POINTS
– 7 –
TUNER PWB
TP301
R223
IC 203
10
AM IF
T204
HT-DP2500
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
0w
10 minutes
A
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.
Initial frequency
characteristics.
If hight energy exceeding X is detected, VOL is lowered to get sound easy to listen.
Hand L frequency characteristics are lowered.
B C D
SP output
level
VOL (Volume) is lowered.
C ~ D :
Control mode cancel conditions
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
continuously for 10 minutes.
When the power is turned off or on.
– 8 –
When quiet music is played back.
When VOL is lowered.
NOTES ON SCHEMATIC DIAGRAM
FRONT
VIEW
• 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
HT-DP2500
• 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
SW1 POWER ON—OFF
SW2 TIMER/SLEEP ON—OFF
SW3 DOLBY PROLOGIC 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
FRONT
VIEW
E C B
(S) (G) (D)
(1) (2) (3)
FRONT
VIEW
BCE
(D)(G)(S)
(3) (2) (1)
POSITIONREF. NO DESCRIPTION
SW9 MEMORY/SET ON—OFF
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 ON—OFF
FRONT VIEW
KRA102 M
KRC102 M
KTC3199 GR
2SC535 C
KRC104 M
KTA1266 GR
2SC2878 B
2SD468 C
KRC107 M
2SD2012 Y
KV1236Z23
Figure 9 TYPES OF TRANSISTOR AND LED
– 9 –
L1154HDB
KDV147 C
HT-DP2500
1
O
2
0
SOC201
ANTENNA
TERMINAL
FM
AM LOOP ANT
1
FM RF
T201
IC201
FM FRONT END
TA7358AP
2
6
5
3
4
L201
T202
FM IF
AM RF
AM ANT
7
VT
OSC
FM OSC
T203
8
L202
AM OSC
9
FM IF
FM IF
AMP
Q201
IF AMP
Q281
FM MUTE LEVEL
FMOSC
VT
A+12V
FM
FM +B
Q203
VR201
FM IF
CF201
FM IF IN
1
OUT
AM OSC
24
OUT
X352
4.5MHz
20
1
OSC
7
PLL CONTROLLER
+B3
AM IF
2
23
IN
CF203
T204
3
REQ
IC203 LA1833
FM/AM IF+MPX
22
21
7
AFC
STEREO
AM RF IN
STEREO
XT21
FM IN
AMIN
16
11
15 22
IC202
LC72131
4
3
5
DICLCE
AM IF
6
SD
6
DO
4
5
GND
IF
OUT
10
VOLTAGE
REGURATER
A+12V
+B3
IF IN
12
21
CF202
8 9
FM
DET
17
+B3
VCC
11
PHASE
+B3
+5V
10
9
17 18
FM
OUT
12
AM/FM
MPX
VCO
CUT
19 16
AM
OUT
L R
MPX
14 13
MUTING
TUNER MUTE
Q202
15
IN
SD
DISPLAY
FL1
P14
VPP
P13
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
10
VCR1
VCR1
OUT
VCR2
IN
AUX IN
HEAVY
SOFT
JK401
L
IN
R
MUTE
L
Q117
Q118
R
MUTING
L
IC411 NJM4565D
VCR1 OUTPUT AMP
AMP
L
2
R
6
4
8
A–12V A+12V
3
5
VCR1
VCR2
TUNER
L
R
AUX
DICECL
232425
L
55
57
R
54
L
58
R
52
L
60
R
L
53
59
R
FRONT
IN
48
64
RTIN
LTIN
R
A+12V
56
VDD
IC501 LC75396N
AUDIO PROCESSOR
GRAPHIC EQUALIZER
VSS
R-OUT
47
26
L
6349
L-OUT
34
43 42
44
5
4
VOLUME
VOLUME
CENTER
REAR
IN
30
1
46
2
R
R
L
1845
3
R
L
C-IN
S-IN
X-BASS
IC581
NJM4558D
HEADPHONE AMP
H-MUTE
L
17
31
R
REAR
OUT
20
28
CENTER
OUT
Q531
Q532
33
16
L
R
34
CLK
38
35
DATA
37
ENABLE
36
A+12V
18
VCC
8
VREF
7
21
GND
17
L-IN
46 45
IC452
LV1035
DOLBY
PRO LOGIC
DECORDER
OSC
10 11
32
S-OUT
31
R-IN
L-OUT
R-OUT
12
C-OUT
9
L-MIX OUT
24
23
R-MIX OUT
22
L-IN
R-IN
S-IN
15
14
16
S-OUT
IN
L
R
REAR
IN
CENTER
IN
3
5
A–12V
5
3
6
8
4
4
A–12V
A–12V
A+12V
8
4
OUT
L
1
7
R
J581
HEAD
REAR
OUT
7
1
CENTER
IC561
NJM4558
OUT
SUB W
2
A+1
A+
Figure 10 BLOCK DIAGRAM (1/2)
– 10 –
HT-DP2500
J
Y
FAN
PROTECT
VF1
VF2
SW1
POWER
SW23
JOG
VPP
P14
P13
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
75
P11
P12
P15
P16
NC
NC
NC
NC
DAPD
ADPD
AC3-RES
AC3-SS
AC3-SI
D-SEL
AC3-SCK
SW-ON
PRO-ENA
PRO-DI
PRO-CK
V-SW1
V-SW2
V-MUTE
TUN-DO
TUN-DI
1 2 3 4
73 74
P10
65
P3P4P5P6P7P8P9
P1
P2
63 64
66
69 70
72
67 68
71
IC1
IX0001SJ
SYSTEM
MICROCOMPUTER
TUN-CK
TUN-CE
TUN-MUTE
TUN-SD
TUN-ST
VDD
OSC2
OSC1
VSS XIXO
10
11 12
13 14
8 9
5 6 7
10G
MMOD
15
60 61 62
VREF
16
KEY1
(AC)
(AC)
KEY2
54 55 56 57
2G
3G4G5G6G7G8G9G
JOG DOWN
REMOCON
SYS-STOP
SP-LEVEL
MODEL
22 23
21
53
SPSWB
1G
SPSWA
LED1
SW-RLAY
C-RLAY
R-RLAY
POW-SW
FA-RLAY
SW-MUTE
C-MUTE
R-MUTE
F-MUTE
JOG UP
AC3-SO
POWER
V-DATA
V-CK
V-LACH
FS-CK
FS-DATA
FS-STB
POSISTER
RESET
24
51 52
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
ALC
VREF+
58
KEY3
AREA
20
18
19
59
17
UT
L
R
J581
HEADPHONES
A+12V
REAR
OUT
CENTER
561
M4558D
T
SUB WOOFER
VOLTAGE
REGURATER
D630
A-12V
RESET
LED1
STAND-BY LED
LED2
TIMER LED
REMOCON
Q6
L-CH IN
F-MUTE
R-CH IN
S/W IN
S-MUTE
CENTER IN
C-MUTE
REAR-IN
R-MUTE
RX701
1
REMOTE
SENSOR
2
10
IC701
LM2876
POWER AMP.
1
–B1
+B1
8
5
4
7
Q701
Q702
10
8
IC702
LM2876
POWER AMP.
1
–B1
+B1
5
4
7
10
IC703
LM2876
POWER AMP.
1
–B1
+B1
8
5
4
7
Q751
Q752
10
IC704
LM2876
POWER AMP.
1
–B1
+B1
8
5
4
7
Q771
Q772
10
IC705
LM2876
POWER AMP.
1
–B1
+B1
8
5
4
7
Q781
Q782
SW2-SW8
SW9-SW15
KEY MATRIX
Q7
Q8
ZD1
3
OVER CURRENT
3
OVER CURRENT
3
OVER CURRENT
3
OVER CURRENT
3
OVER CURRENT
3
µ-COM+5V
DETECTOR
Q707
Q708
Q705
SWITCHING
L-CH OUT
SWITCHING
DETECTOR
Q706
R-CH OUT
Q755
Q756
Q754
DETECTOR
SUB WOOFER OUT
SWITCHING
Q775
Q776
Q774
DETECTOR
CENTER OUT
SWITCHING
DETECTOR
Q785
Q786
Q784
REAR-OUT
SO701
SPEAKER
TERMINAL
+
–
+
–
+
–
+
–
S0702
REAR
SPEAKER
TERMINAL
+
–
–
+
FRONT
L-CH
GND
FRONT
R-CH
GND
SUB WOOFER
GND
CENTER OUT
GND
L-CH
GND
GND
R-CH
A+12V(ANALOG)
Q621
Q622
VF2
(AC)
VP
VF1
(AC)
D621-D624
VOLTAGE
REGULATOR
F811
800mA
Q611
T.F
T801
POWER
TRANSFORMER
SWITCHING
POWER SW
µ-COM5V
Figure 11 BLOCK DIAGRAM (2/2)
– 11 –
Q603
Q602
POW-2
RLY601
VOLTAGE
REGULATOR
Q601
POW-1
D601–D604
T601
T.F
F801
3A
AC POWER
SUPPLY CORD
AC 120V 60Hz
HT-DP2500
E
3
3
3
SIN
C
R
N
U
D
N
A
D
S
S
LF4C1
RF4C2
3
3
4.6V
24V
A
B
C
JK401
AUDIO
D
E
F
G
H
INPUT/OUTPUT
L-CH
VCR-1
IN
R-CH
L-CH
VCR-1
OUT
R-CH
L-CH
VCR-2
IN
R-CH
L-CH
AUX
IN
R-CH
12
10
CNS201
TO TUNER PWB
P18 5-A
CNP201
19
17
16
15
14
13
FC1
R419
2.2K
R403
4.7K
R404
4.7K
C407
2.2/50
R407
22K
R408
22K
C408
2.2/50
V2MUTE
12
R409
5.6K
R410
5.6K
CNP1A
TO DISPLAY PWB
P16 1-F
R401
33K
C401
390P
C402
390P
R402
33K
Q411
R405
C2878B
1K
0V
C405
330P
0V
C406
330P
0V
R406
Q412
1K
C2878B
R420
2.2K
R421
33K
R423
C421
4.7K
390P
C422
R424
390P
4.7K
R422
33K
R425
33K
R427
C423
4.7K
390P
C424
R428
390P
4.7K
R426
33K
C425
0.022
D421
D422
1N4148
1N4148
VCR-1'( )
0V
(0.7V)
0V
(0.7V)
MAIN PWB-A(1/2)
TUN–CK
TUN–DO
11
TUN–CE
TUN–DI
9
D–GND
8
TUN–SD
7
TUN–ST
6
TUN–MUTE
5
A+12V
4
TUN–R
3
A–GND
2
TUN–L
1
FUN–SW
23
PROTECT
22
@
H/P–SW
21
SW–MUTE
20
C–MUTE
R–MUTE
18
F–MUTE
V–DATA
V–CK
V–LATCH
H.P MUTE
SP–LEVEL
TUN–ST
11
TUN–SD
10
TUN–MUTE
9
TUN–CE
8
TUN–CK
7
TUN–DI
6
TUN–DO
5
V–MUTE
4
PRO–CK
3
PRO–DI
2
PRO–ENA
1
CNS1B
C409
47P
R411
18K
R412
18K
C410
47P
FM SIGNAL
C411
0V10V
R413
5.6K
0V
IC411
NJM4565D
8
6
7
0V
0V
R414
5.6K
C412
47P
47P
–9.7V
0V
4 3 2 1
5
R416
0V
4.7K
R417
8.2K
R415
4.7K
R418
8.2K
C413
2.2/50
C415
0.022
C437
47/16
C416
C414
+B
0.022
2.2/50
+B
C438
47/16
R449
220
R448
220
C485
4.7/50
C487
4.7/50
C489
3.3/50
C491
0.15/50
C493
0.15/50
C495
0.47/50
C497
0.47/50
R480
1K
C484
0.47/50
C486
0.47/50
C488
0.15/50
C490
0.15/50
C492
3.3/50
C494
4.7/50
C496
4.7/50
C515
1/50
C511
47/16
C509 1/50
C507 1/50
C505 1/50
C503 1/50
C501 1/50
C502 1/50
C504 1/50
C506 1/50
C508 1/50
C510 1/50
C512
47/16
C516
1/50
R503
27K
R501
3.9K
R502
3.9K
C514
100P
R479
1K
4.7V
C453
0.1
4.7V
5.4V
4.8V
5.4V
4.7V
4.7V
4.7V
4.7V
4.7V
4.7V
5.4V
4.7V
5.4V
4.7V
4.7V
R519 1K
R517 1K
R515 1K
R513 1K
R511 1K
R512 1K
R514 1K
R516 1K
R518 1K
R520 1K
L-BPF3
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
C454
0.1
C550
330/16
C483
47/50
C480
0.47/50
C455
0.1
4.5V
4.7V
4.6V
L-BPF2
L-BPF1
DC-OUT3
R-RECT
DC-OUT4
L-RECT
VLR-TH
VLR-1
VLR-2
VCR-2
DOLBY PRO LOGIC
VCR-1
VCR-TH
L+R-RECT
DC-OUT2
L-R-RECT
R-BPF3
DC-OUT1
4.7V
4.6V
4.7V
R-BPF1
R-BPF2
C456
0.1
C460
C549
0.022
R522
1K
C518
100P
C513
4.6V
4.6V
4.6V
4.6V
4.6V
4.6V
4.6V
9.3V
+B
4.6V
4.6V
4.6V
4.6V
4.6V
4.6V
4.6V
4.5V
27K
R504
D501
1N4148
D502
1N4148
0V
4.5V
4.7V
4.8V
42 43 44 45 46 47 48
LT-IN
RT-IN
DC-OUT
C-MODE
IC452
LV1035M
DECORDER
R-DC-OUT
L-DC-OUT
C-DC-OUT
S-DC-OUT
4 3 2 1
6
5
7
4.8V
4.8V
4.8V
4.8V
C459
10/50
C457
10/50
C458
10/50
10/50
R521
1K
4.6V
C517
1/50
1/50
C519
4.5V
4748
LTIN
49
50
51
L4
(TUN)
52
L3
(AUX)
53
L2
(VCR2)
54
L1
(VCR1)
55
VDD
56
R1
(VCR1)
57
(VCR2)
R2
58
(AUX)
R3
59
(TUN)
R4
60
R5
61
RINVIN1
62
RSELO
63
RTIN
64
RF1C1
4.6V
4.6V
C520
0.47/50
C522
R474
C479
0.022
C478
0.047
C477
680P
4.8V
4.3V
4.8V
0V
0V
39 40 41
CLK
OSC
GND
VCC
VREF
8
9.5V
R462
C461
C462
+B
4.6V
0.47/50
LF1C1
LF1C2
49
50
51
NS-BPF1
NS-BPF2
C-OUT
S-OUT
11 12 13 14 15 1
9
10
4.7V
4.7V
4.7V
1K
C464
10/50
220/16
C463
10/50
220/16
C521
0.047
C523
4.6V
4.1V
4.6V
43444546
LF2C1
LF1C3
LSELO
LINVIN1
L5
DATA
R-OUT
L-OUT
4.7V
0.15/50
4.4V
LF2C3
LF2C2
LC75396
AUDIO PROC
RF3C1
RF2C3
RF2C2
RF2C1
RF1C3
RF1C2
4 3 2 1
6
5
7
4.6V
2.4V
4.6V
4.1V
2.4V
C526
C524
0.039
0.15/50
0.047
PRO–ENA
PRO–DI
1K
1K
R476
0V
4.3V
34 35
36 37 38
DATA
ENABLE
DC-O
DC-O
AC-GND
L-IN
4.6V
4.7V
C465
220/16
C525
0.039
2.4V
4.6V
3940
4142
LF3C2
LF3C1
IC501
RF3C3
RF3C2
10 1
8
9
4.5V
4.6V
PRO–CK
R475
0V
4.3V
O
CLK
O
V
L-O
R-O
S-O
G
I
D
V
R-IN
4.7V
4.7V
2.6V
LF3C3
1
1
1
RF4C1
2.4V
NOTES ON SCHEMATIC DIAGRAM can be found on page 9.
1
23456
Figure 12 SCHEMATIC DIAGRAM (1/7)
– 12 –
R474
L
OUT
DATA
LF2C3
RF3C1
4
6V
PRO–ENA
PRO–DI
PRO–CK
1K
1K
R475
1K
R476
VSS
0V
4.3V0V4.3V
33 34 35
36
7
ENABLE
IC
AC-GND
2 13 14 15 16
4.6V
4.7V
C465
220/16
C525
0.039
2.4V
4.6V
412
LF3C1
OSC
CLK
DATA
OSC
VDD
DC-OUT
DC-OUT
L-OUT
R-OUT
S-OUT
GND
IREF
DET
VCC
L-IN
R-IN
4.7V
2.6V
3940
LF3C3
LF3C2
A/D
NS
D/A
S-IN
4.7V
2.4V
38
LF4C1
32
31
30
R463
18K
3300P
37
LFCOM
LFOUT
LRIN
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
C535
4.6V
2.6V
36
LF4C2
2.3V
2.1V
5.2V
4.7V
4.7V
4.7V
4.7V
4.7V
4.6V
4.6V
4.7V
0V
0.8V
1.5V
9.5V
4.7V
4.6V
LF4C3
IC501
C75396E
PROCESSOR
RRCOM
9
1
RRIN
1
8
RFOUT
1
7
RF5
RF4C3
RF4C2
RF4C1
RF3C3
RF3C2
10 11
8
9
4.6V
4.5V
2.4V
4.6V
12 13
4.6V
C536
4.6V
0.0033
526
039
.
X451
R465
1M
C473
0.082
C475
0.082
C471
0.33/50
C470
10/50
R464
39K
C466
220/16
DELAY-OUT
1N4004
4.6V
4.5V
35
33
34
LF5
LFIN
LTOUT
LRCOM
LROUT
LVREF
VREF
RVREF
RROUT
RFCOM
RFIN
RTOUT
14 15
16
4.6V
4.1V
4.6V
C538
1/50
D451
C537
1/50
VSS
CE
CL
C540
DI
10/50
C476
220/16
C474
3300P
C472
0.47/50
C468
10/50
C469
10/50
C467
2.2/50
R471 100K
R472 100K
R469 100K
R470 100K
D452
1N4004
4.6V
32
4.6V
31
4.6V
30
4.5V
29
4.6V
28
4.6V
27
0V
26
R528 1K
0V
25
R529 1K
0V
24
R530 1K
0V
23
4.6V
22
4.6V
21
4.6V
20
4.6V
19
4.5V
18
4.6V
17
C542
2.2/50
R459
C539
10/50
C541
2.2/50
C543
1/50
C547
2.2/50
C553
47/16
C548
2.2/50
C544
1/50
R460
1K
V2LATCH
V2DATA
–B
1K
C545
10/50
C551
47/16
V2CK
C552
47/16
C546
10/50
+B
+B
R461
+B
+B
HT-DP2500
SW–MUTE
R–MUTE
F–MUTE
H/P–SW
27K
C567
100K
R600
R598
1K
R596
3.3K
4.7/25
C566
0.022
R433
47K
C428
4.7/25
C586
1K
C429
0.022
R432
0.056
5.6K
C–MUTE
R594
3.3K
R440
C427
10K
330P
–B
5
4
3
2
1
BI581
SP–LEVEL
PROTECT
D–GND
A+12V
A–GND
A-12V
5
5
4
4
3
3
2
2
1
1
CNP581
CNS581
FRONT–L
FL– GND
F–MUTE
FRONT–R
FR–GND
C–MUTE
CENTER
C–GND
R2MUTE
REAR
R–GND
SW–MUTE
SW2GND
16
15
12
18
19
20
R591
100
R592
100
HEADPHONES
PWB-C4
1
2
3
4
5
11
9
10
14
12
13
8
1
2
3
CNP5
SW
6
7
P14 6-H
J581
HEADPHONES
P14 1-D
CNS5
TO DISPLAY PWB
P14 1-D
P17 12-B
V–DATA
V–LATCH
V–MUTE
H.P MUTE
V–CK
Q531
2SC2878B
R532
22K
–B
1K
+B
R555B
220
R554B
220
+B
R531
4.7K
R581
2.2K
R583
R584
R582
2.2K
R553
4.7K
R571
2.2K
R572
2.2K
R555C 220
R554C 220
R561
2.2K
R563
100K
R564
100K
R552 56K
R553 56K
R551 56K
R550
15K
22K
22K
Q532
2SC2878B
R562
2.2K
R430
C436
0.022
R585
R586
R565
C562
220P
R566
C435
2.2/50
C554
330
1K
220P
C581
220P
C582
1K
+B
1K
C561
220P
1K
+B
C569B
47/16
10.1V
0V
4 3 2 1
IC431
NJM4558D
6
5
56K
0V
0V
47P
C434
R587
3.9K
C585
0.022
10.9V
4 3 2 1
NJM4558D
5
0V
C584
47P
R588
3.9K
R567
8.2K
C565
0.022
4 3 2 1
10.1V
NJM4558D
5
0V
47P
C564
R568
8.2K
0V
0V
8
7
–9.9V
0V
+B
R438
150K
C433
0.022
C583
47P
0V
IC581
6
0V
27K
R590
47/16
0V
IC561
6
0V
27K
R570
C432
10/50
47/16
C570B
0V
7
0V
C569
C563
0V
7
0V
C587
0V
10/16
8
–10.7V
C588
10/16
C570
47/16
C577
2.2/50
C578
2.2/50
C569C
47/16
R569
27K
47P
0V
8
C568
4.7/25
C570C
47/16
C431
6800P
R434
1K
R435
R436
R589
–9.9V
C430
47P
47K
47K
R437
7
8 9 10 11 12
Figure 13 SCHEMATIC DIAGRAM (2/7)
– 13 –
HT-DP2500
VF1
25V
A
B
C
D
P13 12-E, 12-G
E
F
G
MAIN PWB-A(2/2)
R701
R703
R704
R742
R762
R782
10K
10K
56K
3.3K
3.3K
R705
C707
R706
C708
R743
C744
R763
C764
R783
C784
1K
1.2K
330P
C705
R724
4.7K
R702
1K
1.2K
330P
C706
R741
1K
470
330P
C743
R753
4.7K
R761
1K
1.2K
330P
C763
R781
1K
1.2K
330P
C783
R793
4.7K
100/35
100/35
100/35
100/35
R773
4.7K
100/35
47/50
22/50
22/50
FRONT_L
1
FL_GND
2
F_MUTE
3
FRONT-R
4
FR_GND
5
SW
6
SW_GND
7
SW_MUTE
8
CENTER
9
C2GND
10
C_MUTE
11
REAR
12
R_GND
13
R_MUTE
14
C701
220P
R707
C702
220P
C741
220P
R744
C745
R764
C765
R784
C785
1K
C761
220P
C781
220P
C703
R709
1K
C704
R708
C742
C762
1K
C782
1K
33P
47K
33P
R710
1K
33P
R745
33P
R765
33P
R785
100/35
0V
(3.4V)
0V
(3.4V)
0V
(3.4V)
11
0V
10
0V
9
–3.2V
8
LM2876
0V
7
6 5
Q702
KRC107M
MUTE ON' ( )
0V
2.9V
(3.4V)
(0V)
1
0V
(0V)
C709
11
0V
10
0V
9
-3.2V
8
LM2876
0V
7
47K
6
11
0V
10
0V
9
-3.2V
8
LM2876
0V
7
6
47K
Q752
KRC107M
MUTE ON' ( )
23
3
2.9V
(0V)
1
2.9V
(0.9V)
0V
(0V)
11
0V
10
0V
9
-3.2V
8
LM2876
0V
7
6
47K
Q772
KRC107M
MUTE ON' ( )
2
3
3
2.9V
(0V)
1
2.9V
(0.9V)
0V
(0V)
11
0V
10
0V
9
-3.2V
LM2876
8
0V
7
47K
6
Q782
KRC107M
MUTE ON' ( )
2 3
3
2.9V
(0V)
2.9V
1
0V
(0.9V)
(0V)
IC701
Q701
KRA107M
3 2 3
2.9V
(0.9V)
IC702
IC703
Q751
KRA107M
(–0.4V)
1
IC704
Q771
KRA107M
(–0.4V)
1
IC705
Q781
KRA107M
(–0.4V)
1
2
–3.2V
(–0.4V)
1
2
–3.2V
2
–3.2V
2
–3.2V
1
2
3
–2.9V
4
R719
18K
R721
39K
R720
12K
2.9V
1
2
3
4
5
1
2
3
4
5
2.9V
R751
39K
R754
100K
R752
27K
2.9V
1
2
3
4
5
2.9V
R771
39K
R774
100K
R772
27K
2.9V
1
2
3
4
5
2.9V
R791
39K
R792
27K
2.9V
0V
2.9V
0V
-2.9V
2.9V
2.9V
0V
-2.9V
0V
-2.9V
0V
-2.9V
R794
100K
C714
10/50
0V
C715
0.022
R713
0.2
C713
10/50
KTC3199GR
0V
C716
0.022
R714
0.2
KTC3199GR
0V
C748
0.022
R747
0.2
C747
10/50
0V
C768
0.022
R767
0.2
C767
10/50
KTC3199GR
0V
C788
0.022
R787
0.2
C787
10/50
Q705
KTC3199GR
5.0V
0V
R717
12K
R715
2.2K
C711
10/50
Q706
5.0V
0V
R718
12K
R716
2.2K
C712
10/50
Q754
5.0V
0V
R749
12K
R748
2.2K
C746
10/50
Q774
KTC3199GR
5.0V
0V
R769
12K
R768
2.2K
C766
10/50
Q784
5.0V
0V
R789
12K
R788
2.2K
C786
10/50
D701
1N4148
D702
1N4148
D704
1N4148
D706
1N4148
D708
1N4148
D703
1N4148
0V
Q707
KTC3199GR
Q708
KTC3199GR
D705
1N4148
0V
Q755
KTC3199GR
Q756
KTC3199GR
0V
D707
1N4148
KTC3199GR
KTC3199GR
D709
1N4148
0V
Q785
KTC3199GR
Q786
KTC3199GR
R727
22
Q775
Q776
5V
0V
R728
22
R757
22
5.0V
0V
R777
22
5.0V
0V
R797
5.0V
0V
L701
R725
22
5V
0V
0V
C717
47/50
L702
R726
22
L703
R756
22
R758
56K
5.0V
0V
0V
C749
47/50
L704
R776
22
R778
56K
5.0V
0V
0V
L705
22
R796
22
R798
56K
5.0V
0V
0V
C789
47/50
R729
56K
C769
R731
R779
47/50
56K
R759
56K
R799
56K
56K
C719
0.1
C721
0.1
R733
4.7
R730
C720
0.1
C722
0.1
R734
4.7
C750
0.1
C751
0.1
R760
4.7
C770
0.1
C771
0.1
R780
4.7
C790
0.1
C791
0.1
R795
4.7
56K
SP_LEVEL
PROTECT
16
15
A_GND
D_GND
18
17
P13 12-B
+B
A+12V
19 20
–B
A–12V
H
NOTES ON SCHEMATIC DIAGRAM can be found on page 9.
1
23456
Figure 14 SCHEMATIC DIAGRAM (3/7)
– 14 –
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