Polaroid V23D series Service Manual page 29

(2) AV Signal
Refer to the page 8 in circuit diagram of PWB-0812.
V30DXXX / V27DXXX can process 4 different Video signals，including Composite
Video (CVBS)、Separate Video (S-Video ) and Component Video (YUV). Component
Video also includes two types Y Cb/Cr and Y Pb/Pr, and I018,I031 SAA7117 is 16
channels analog input. There are 4 A/D in it's I/O port, So it can match this model.
Examples for different of input source signals are listed one by one as follow. (please
refer to the circuit diagram)：
Interlaced
CV
SV
AV
I033
V-Chip
Z8612912
I024
PI5V330
I035
TV/AV
3D Comb filter
TC90A65F
(or UPD 64083)
PC / Component Video
VGA
A. TV：
i.
ii.
iii.
TV – Tuner
ANT
UT01
(Philips)
FQ1236 MK3
I018
Video Decoder
SAA7117
I006
Progressive
ADC
AD9883A
Interlaced
I031
Video Decoder
SAA7117
I001
ADC
AD9883A
TV signals enter from ANT to Pin#1 of UT01 FQ1236 MK3 Tuner. Pin
#14 output Audio MPX signal, while Pin#12 output TV (CVBS) Video signal.
Audio MPX signal does MTS demodulation from I044 (I044 MSP3440G).
It can output Audio signal including Mono、 Stereo、Sap and so on. Then
through I010 (Audio Power Amp) to Speaker.
After the Video signal to the V-Chip circuit (I025 NJM2244、I033
Z86129、I030 74HC126) to modulate it, output to I031 SAA7117 Video
Decoder (Main) or I018 SAA7117 Video Decoder (Sub) circuit to do
modulation and Video source exchanges for CVBS signal type. Then CVBS
signal changes to the ITU-656 type by I031 or I018 and outputs to I019 Scaler
to process. 8 Bit belongs to Data parts, and H sync, V sync, CLK directly
connect to Pin#162 、 163 、 164 of Scaler. Then R 、 G 、 B signal respectively output
six bits to panel.
I044
SIF
4:1
Audio
MTS & Audio
Video
Processor
MSP3440G
CV Audio
SV/AV Audio
PC Audio
8 bit
Port
I038
V(Sub)
RAM HY57V64
I03
De-Interlace
SiI504C
24 bit
I032
Sync.
P15V3
Port
B(Main)
24 bit
28
I010
Audio Amp.
TFA9843)
I019
I009
Interface
T
HC63
Scaler
TP6761
I020
RAM
HY57V16
10W +
10W
Speaker
Headphone
LCD