Philips 55PUL7472/F7, Руководство по обслуживанию, Страница: 33 / 60

9-2
2. Video/Audio Block Diagram
DIGIT
AL
A
UDIO OUT
(OPTICAL)
DIGIT
AL MAIN CB
A UNIT
T
O
SYSTEM CONTR
OL
BLOCK DIA
GRAM
TO SYSTEM CONTR
OL
BLOCK DIA
GRAM
T
O
DIGIT
AL
SIGNAL PR
OCESS
BLOCK DIA
GRAM
VIDEO SIGNAL
AUDIO SIGNAL
CVBS- A
UDIO(L)-IN
CVBS- A
UDIO(R)-IN
JK3706
Q3803
MUTE
HP(L)
HP(R)
SPDIF
HP-DET
HP-MUTE
Q3805
Q3804
MUTE
MUTE
DRIVE
DIF-OUT1 DIF-OUT2
IF-A
GC
IC9001
10
22
11
IF-A
GC
5
OUTPUT I/F
DSP /FILTER
PGA
ADC
RF AGC
JK9301 ANT
-IN
(DIGIT
AL/ANALOG TV TUNER)
CVBS- VIDEO-IN
JK3705
CVBS-VIDEO-IN
SP-MUTE
CN3801
A
UDIO(L)-OUT
A
UDIO(R)-OUT
2
SP(L)-
1
SP(L)+
HEADPHONE JA
C
K
JK3708
CVBS-
A
UDIO(L)-IN
CVBS-
A
UDIO(R)-IN
SP3801 SPEAKER L-CH
1 2 3
25 23
PO
WER
ST
A
G
E
PO
WER
LIMIT
GAIN CONTR
OL
AMP
PO
WER
ST
A
G
E
MODULA
T
O
R
18 20
12
IC3801
(A
UDIO AMP)
CONTROL LOGIC
FAULT LOGIC
PWM LOGIC
PO
WER
LIMIT
GAIN CONTR
OL
AMP
MODULA
T
O
R
PWM LOGIC
SP(R)- SP(R)+
PL22.06BLVA