Schematic Drawing Descriptions; Schematic Page 1 ; Tuner / Video Chroma - Hitachi 32PD3000E Service Manual

Schematic Drawing Descriptions

Schematic Page 1 ; Tuner / Video Chroma

TUN100 Asymmetrical type tuner ; UV1316/A 1G-3 313914716781
supply voltage ; +5V at pin 7 and +33V at pin 9
control by I2C, SDA at pin 5 and SCL at pin 4
picture carrier 33.90MHz, picture to sound carrier distance 6.5MHz for
SAW100 K3953M
standard L
SAW101 K9456M sound carrier 40.40MHz for standard L
VHF/UHF asymmetrical type tuner converts RF input signal to IF signal output
through pin 11.
AGC voltage is supplied at pin1 from IC100 pin62
IF output is going through buffer Q101 to SAW filter SAW100 for VIF at pin 2 and 3
of IC100 and to SAW101 for SIF at pin 63 and 64.
IC100 Video chroma and video switch TDA9321H
supply voltage ; +8V at pin 11 and 48 (AS)
control by I2C, SDA at pin 47 and SCL at pin 46
TR100 TPWA01B - nominal centre freq. Fn1=6.0MHz and fn2=6.5MHz
TR101 TPWA04B - nominal centre freq. Fn1=5.5MHz and fn2=5.742MHz
X100 3.58MHz X'tal
X101 4.43MHz X'tal
* IF demodulator and video chroma
Demodulated video signal is output from pin 10 going to sound traps
There are two sound traps, TR100 for I/L signal and TR101 for BG, output from
which are switched by SOUND-SWITCH from IC301 pin 5
After group delay correction at pin 13, it is connected to pin 14 where TV picture is
supplied into video switch.
The TV signal from pin13 is also connected to SCART1 as TV signal output.
Quasi Split Sound converted from SIF input is output at pin 5 to connect with sound
decoder IC301
H and V sync pulses are output at pin 60 and 61 to go to FC/MSC for synchronization to
convert progressive scan. H pulse must be inverted by Q126.
When selecting one of video signal in video switch of IC100, CVBS signal is going to
COMB filter if the video is CVBS PAL/NTSC format.
Then Y/C separated signal is coming back at pin 28 and 29. The clock must be
provided from pin 30.
The video or Y/C signal selected pass through video chroma section and finally
converted to YUV format at pin 49, 50, 51
IC100 is supplied 4.43MHz and 3.58MHz clock from crystal X100 and X101,
which is automatically selected according to the signal received.
2 RGB inputs are also switched at the last stage in IC100. RGB signals are also
converted to YUV.
* video switch
32PD3000 / 42PD3000
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