Philips 37TA1800/93 Service Manual page 54

54 TPT1.0A LA
8.2 Circuit Description
Description of Scaler board
There are video processing and some audio function in scaler board. The 37/42TA1800 uses Trident SVP-PX66 as Scaler engine, which has
embedded Analog D-SUB, digital HDMI receiver, scaling input signal to panel OSD mapping and simple 3D de-interlacer. The extra DDR is to
accomplish video frame rate conversion and to provide OSD and de-interlacer with enough memory.
The external CPU (M30620SPGP) can provide control signals such as backlight control, RC (Remote Control), detect keypad input, IIC I/O
communication, TV tuning control, sound control and power control .
Embedded Video decoder is used to execute all video signal processing except HDTV. HDTV is go through embedded ADC converter. 3D comb
and 3D de-interlacer are included in scaler. Scaler can decode CC, TT, V-chip data to display.
In west Europe and AP model, Tele-text (TT) function is necessary, but China Model is no need. In NAFTA model Close-Caption (CC) function is
necessary.
One audio decoder MSP34XXG is used for TV sound processing, and output to TPA3800D2 . Post D-class amplifier is in scaler board.
Description of TV system
A TV tuner with remote control will be mandatory for AP, China, West Europe and NAFTA production models.
Tuner and sound decoder deviation:
WE
Tuner FQ1216ME/I H-5
94TPASEALL 3P
MSP MSP3450G-QI-B8V3
56G 593504
8. Circuit Descriptions and IC Data Sheets
Fig 1 37/42TA1800 block diagram
NAFTA AP
FQ1236/F H-5 FQ1216PN/I H-5
94TNTSC MA 1P 94TNPALALL P1
MSP3440G-QI-B8V3 MSP3410G-QI-B8V3
56G 593 7 56G 593901
China
FQ1256/I H-5
94T PALBDI 1P
MSP3410G-QI-B8V3
56G 593901