Service manual

HT-DP2500
– 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 AMIN
IC202
LC72131
PLL CONTROLLER
STEREO
OSC
X352
4.5MHz
FM IF
FM IF IN
OUT
AM OSC
OUT
IN
AFC
AM RF IN
SD
IF
OUT
IF IN
MPX
IN
L R
MPX
VCO
CUT
DI CL CE DO
XT21
+5V
VOLTAGE
REGURATER
A+12V
SD
+B3
1
AM LOOP ANT
FM
AM ANT
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/AM IF+MPX
CF203
CF202
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
R
L
R
L
R
L
R
JK401
MUTING
Q117
Q118
L
R
L
R
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
LTIN
RTIN
CENTER
REAR
IN
FRONT
IN
L
R
R
L
L
R
R
L
DI CE CL
VSS
VDD
C-OUT
L-MIX OUT
R-MIX OUT
S-OUT
L-IN
R-IN
S-IN
C-IN
L-OUT
R-OUT
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
23
24
25
56
3
2
1
30
A+12V
VCC
A+12V
GND
34
38
35
37
36
18
21
17
31
32
10 11
12
14
15
16
22
23
24
46 45
CLK
DATA
ENABLE
8
OSC
9
7
VREF
IC452
LV1035
DOLBY
PRO LOGIC
DECORDER
L-IN R-IN S-IN L-OUT R-OUT S-OUT
8
4
CENTER
OUT
L
R
REAR
OUT
A–12V
A+
1
3
IC561
NJM4558
5
REAR
OUT
CENTER
7
1
L
R
L
R
IN
3
5
8
4
OUT
1
7
A–12V
IC581
NJM4558D
HEADPHONE AMP
J581
HEAD
A+12V
H-MUTE
4
OUT
A–12V
REAR
IN
CENTER
Q531
Q532
6
IN
SUB W
O
2
A+1
2
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
0
P14
STEREO
MUTE
P13
VPP
X-BASS
HEAVY
SOFT
DISPLAY
FL1