Sharp LC-32AX5H Service Manual page 33

2. IC1301 (IXB302WJ)
• IC1301 (IXB302WJ) Signal Flow Description
• The INPUT3 (HDMI) signals are input into IC801 via IC8702. The tuner SIF signal is input into IC801 and is processed by the sound multiplex
decoder. HDMI or tuner is selected at IC801 and is input into the pins 53/54 of IC1301.
• INPUT1/INPUT2/INPUT3 are input into the pins 47/48/50/51/56/57 of IC1301.
• Tuner, INPUT1/INPUT2/INPUT3 and INPUT3 Audio are selected at IC1301.
• The speaker sound is output from the pins 27/28 of IC1301.
• The headphone sound is output from the pins 27/28 of IC1301.
• The monitor output sound is output from the pins 36/37 of IC1301.
• Power sources are digital +5V (pins 12 and 13), analog +5V (pins 65 and 66) and +8V (pin 39).
• The oscillator circuit employs X'tal (18.432 MHz) (pins 71 and 72).
• I2C control
• The following functions incorporated: Source Selector, Surround, Volume, Bass/Treble, Balance, 7Band GEQ, and 3Band PEQ
BLOCK DIAGRAM
Pin assignment
IC8702
INPUT3
TMDS VHIMST3383M-1Q
(HDMI)
HDMI Reciever
IC801
RH-IXB880WJZZQ
SIF ANA ANA
VIDEO/AUDIO
Decoder
INPUT1
INPUT2 ANA
INPUT3
IC1301
IXB302WJ
BLOCK DIAGRAM of the AUDIO PROCESSOR
VHITPA3100D-1Y
ANA
IC1301
RH-IXB302WJN1Q
Audio Processor
Fuction
ANA VHIBH3544F+-1Y
Source Selector
Surround
Volume
Bass/Treble
Balance
7Band GEQ
3Band PEQ
LINE INPUT SELECT
A/D
Prescale
SOURCE SELECT
Loud Speaker
Sound Processing
Line Out
D/A D/A
Select
7 – 5
LC-32AX5H/M/X
IC1303
SP
OUT
Audio Amp
IC1302
HP
OUT
H-Amplifier
MONITOR
ANA
OUT