Sanyo PLV-55WHD1 Service Manual page 88

Chassis Block Diagrams
● Audio signal processing stage
ANT
A6120
DIGITAL
TUNER
ANTENNA IN
HDMI
DIGITAL
AUDIO OUT
K6MA
K20P
L
VIDEO 3
AUDIO IN
R
L
VIDEO 2
AUDIO IN
R
L
VIDEO 1
AUDIO IN
R
L
AUDIO
OUTPUT
R
WOOFER
OUTPUT
AV BOARD
ANT
ANALOG
TUNER
VIF/SIF
UHF/VHF/CATV
● Description
SIF signal from the TUNER is sent to IC5001(MTS decoder), Video1 audio input signal is sent to IC5001, and
selected signal is sent to IC5101(Audio controller). Video2/3 audio input signals are sent to IC5101. Digital-TV or
HDMI audio signal is output from IC5500 and sent to IC5101 via IC6300(Amp.).
The sound volume and sound quality are controlled in IC5101 by IIC bus. The output audio signals from pins 14
and 25 of IC5101 are sent to pins 2 and 4 of IC001(Audio Amp.) and amplified and output from pins 8 and 12 as
the signals to drive speakers.
Woofer output;
Audio monitor output;
Digital audio output;
IC6100
IF OUT
TS
ATSC
DEMODULATOR
<CAS-220>
HDMI with digital audio signal
When using DVI-HDMI cable, HDMI input
has no digital audio signal, Video3 audio
input is selected automatically.
IC6300
DM_L/R
AMP.
<NJM4558>
50,48
K20M K8M
DIGITAL_L/R
AUDIO3_L/R
AUDIO2_L/R
MO_AL/AR
WOOFER WOOFER
34,33
A101
TU_AUDIO
13
DECODER
<CXA2234>
Woofer signal is output from pin 1 of IC5101 and sent to pin 2 of IC5181 (Woofer
amp.), amplified and output from pin 7 for woofer speaker. The woofer level can be
selected Off/Low/Mid/High with user menu.
Audio monitor output signal is output from pins 11 and 28 of IC5101.
Digital-TV and HDMI audio signals are decoded in IC5500 and SPDIF signal is out-
put from IC5500.
TPDATA
IC5500
DTV
PROCESSOR
&
SCAN
CONVERTER,
<ZR39660>
SPDIF
DDXL/DDXR
10,29
9,30 14,25
IC5101
AUDIO
8,31
1
CONTROL
<NJW1180>
7,32 11,28
MO_AL/AR
IC5181
7
WOOFER
AMP.
<NJM4558>
MO_MUTE
IC5001
MTS
4,3
-88-
DIGITAL BOARD
IC5700, 20
DDR MEMORY
<EDD2516>
IC5750
FLASH ROM
<S29JL064>
SP901
K01L
12
IC001
AUDIO
AMP.
8
<LA42152>
K01R
SP902
6 5
2
58 32
IC801
59
TV CPU
MAIN BOARD
L
R