Philips 55PFL4909 - Page 41

9-7
2. Video/Audio Block Diagram
PL14.26BBLVA
DIGITAL MAIN CBA UNIT
IC3801 (AUDIO AMP)
Q3801
AMP-MUTE COMP-DET
HP-DET
TO SYSTEM CONTROL BLOCK DIAGRAM
SP3802 SPEAKER R-CH
CN3801
SP3801 SPEAKER L-CH
AMP(L)-OUT
AMP(R)-OUT
3SP(R)- 4SP(R)+ 2SP(L)- 1SP(L)+
DIF-OUT1
DIF-OUT2
IF-AGC
TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM
JK3005 PC-RGB -IN
1 2 3
13 14 15
12
VGA-R-IN
VGA-G-IN
VGA-B-IN
VGA-HSYNC
VGA-VSYNC
VGA-SCL
VGA-SDA
TU3901
DIF-OUT1
6
DIF-OUT2
7
(TUNER UNIT)
IF-AGC
5
VIDEO SIGNAL
AUDIO SIGNAL
1 2 3
25 23
CONTROL LOGIC
DRIVE DRIVE
PWM LOGIC
18 20
DRIVE DRIVE
PWM LOGIC
12
POWER LIMIT POWER LIMIT
AUDIO(L)-IN AUDIO(R)-IN
DIGITAL AUDIO-OUT (COAXIAL)
Q3701
BUFFER
AUDIO(L)-IN
AUDIO(R)-IN
HP(L)
HP(R)
SPDIF
COMPONENT -Y/VIDEO-IN COMPONENT -Pb-IN COMPONENT -Pr-IN
JK3702
COM-VIDEO-Y/VIDEO-IN
COM-VIDEO-Pr-IN
COM-VIDEO-Pb-IN
JK3701
(HEADPHONE AMP) IC3851
2 8
3 7
6dB
6dB
JK3703 HEADPHONE JACK