Service manual

HT-DP2500
– 28 –
IC452 VHiLV1035M/-1: Dolby Pro Logic Decorder (LV1035M)
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LR
S
RL
LRSC
S
L
R
S
13 14 15 16
48
L-BPF2 L-BPF1 RT-IN LT-IN DC-OUT C-MODE GND NS-BPF1 NS-BPF2 OSC CLK DATA ENABLE DATA CLK VSS
R-BPF2 R-BPF1
BPF RECT
RECT
S-DC-OUT
C-DC-OUT R-DC-OUT
L-DC-OUT
VREF
VREF
CIRIM
SW6
A
B
B
A
A
B
A B
A
B
SW5
SW7
B
20kΩ
20kΩ
A
SW7
B
B
B
B
A
B
A
S
C
D
A
A
A B
A
B
SW7
SW7
SW4
SW2
SW2
A
B
A
B
A
B
SW7
SW7
23PIN
15PIN
SW7
SW7
SW7
SW4 SW3
13P IN
VCC
C-OUT
S-OUT
R-OUT
L-OUT
AC-GND
L-IN
R-IN
S-IN
OSC
OSC
VDD
A/D
NS
D/A
DC-OUT
DC-OUT
L-OUT
R-OUT
S-OUT
GND
IREF
DET
VCC
DELAY-
OUT
L-BPF3
DCOUT3
R-RECT
DCOUT4
L-RECT
VLR-TH
VLR-1
VLR-2
VCS-2
VCS-1
VCS-TH
L+R-RECT
DCOUT2
L-R-RECT
DCOUT1
R-BPF3
47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
17
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
64
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
BPF
RECT RECT
LR
LOGDIFFLOGDIFFVCS
OSC
VDD
DC-OUT
VOLMUTE
STRIM
B-NR
ADM
C-MODE
S-MODE
VCA VCA
VCA VCA
VCA VCA
VCA VCA
VOL
DEV
BFL-CONT
NOISE-FIL
DATA-DEC
ADM-CONT
S-RAM
IN-FILTER
OUT-FILTER
NOISE-GEN
CH-CONT
VOL
LR
LR
PG
PG
S
Figure 28 BLOCK DIAGRAM OF IC