Analog Audio Block Diagram - Panasonic DMR-EH55EC Service Manual

DMR-EH55EC / DMR-EH55EP / DMR-EH56EG

12.3. Analog Audio Block Diagram

MAIN P.C.B.
FROM
XTMUTE
TIMER
IC7501- 65 QR4002-QR4004
SECTION
MUTE
CIRCUIT
FROM
XDMUTE
DIGITAL
IC54402- 16
P.C.B.
P59001 P7402 MIX R OUT DM
FROM
29
DIGITAL P.C.B.
DIGITAL AUDIO P59001 P7402 MIX L OUT DM
BLOCK SECTION 27
JK3901
21 PIN JACK
AUDIO IN ch2(R)
2
AV1
(TV) AUDIO IN ch1(L)
6
AUDIO IN ch2(R)
2
AV2
(DECODER/EXT) AUDIO IN ch1(L)
6
JK3002
FRONT INPUT JACK
13
LINE
12
(Rch)
11
AV3
AUDIO
(FRONT)
10
LINE
(Lch/MONO)
9
JK3001
REAR INPUT JACK
20
LINE
(Rch)
21
AV4 AUDIO
(REAR)
17
LINE
(Lch)
18
TU7801
U/V TUNER
(EC)ONLY
AUDIO PS7801 PP7401
14
OUT
PS7801 PP7401
SIF OUT 15
TUNER P.C.B.
FROM
P59001 P7402 IEC OUT
DIGITAL
32
P.C.B.
D4005 Q4006
MUTE
Q4007
MUTE
D4006 Q4009
MUTE
Q4008
MUTE
IC4009
(BUFFER)
2 1 56
6 7 64
52
60
53
61
50
58
51
59
IC7301
(NICAM/A2)
MONO
38 R OUT 2 54
5 IN
25 SIF L OUT 1 62
4
76
IC3001
(AUDIO SIGNAL PROCESSOR)
(SA1R)
a
DAC Rch
b
c LPF
DAC Lch
d
e
OUTPUT
SELECT SWITCH
(SA3R) (SA4R)
AV1 Rch
a a
b b
AV1 Lch
c c AGC
d d
AV2 Rch
e
AV2 Lch
(SA5R) (SA2R)
BUFF.
AV4 a
b
TUN c LPF
d
e
AV3 Rch
(SA2L)
AV3 Lch
a
b
c LPF
d
e
OUTPUT
SELECT SWITCH
(SA3L) (SA4L)
a a
AV4 Rch
b b
c c AGC
d d
(SA5L)
e
AV4 Lch BUFF.
AV4
TUN
(SA1L)
a
b
c LPF
d
e
TUN Rch
IIC BUS
LOGIC
TUN Lch
RF OUT
MUTE VCA +
MIX
46
:REC SIGNAL :PB SIGNAL
MIX L OUT2
MIX R OUT2
BUFF.
AV1 Rch AUDIO OUT Ch2(R)
MUTE 72
AUDIO OUT Ch1(L)
ADC Rch ADC Rch
79
AMP
BUFF.
AV2 Rch AUDIO OUT Ch2(R)
MUTE 74
AUDIO OUT Ch1(L)
BUFF.
AV2 Lch
MUTE 73
AADC R
ADC Lch AADC L
ADC Lch
78
AMP
BUFF.
AV1 Lch
MUTE 71
SCL
88
SDA
89
5V
2.3V
1.0V
DMR-EH55EC/EP,EH56EG
Analog Audio Block Diagram
JK3001
REAR JACK
16
LINE OUT
(L)
18
AV4
19
LINE OUT
(R)
21
JK3901
21 PIN JACK
1
AV1
(TV)
3
1
AV2
(DECEODER/EXT)
3
P7402 P59001
19
TO
DIGITAL P.C.B.
DIGITAL AUDIO
BLOCK SECTION
P7402 P59001
17
IIC CLK
FROM
IC7501- 29
TIMER
IIC DATA
SECTION
IC7501- 30
IC4901
OPTICAL
(DIGITAL AUDIO OUT)
1