Akai LM-H17CLSA, Service Manual, Page: 27 / 54

3) TV Signal
Refer to sheet 11
、
8
、
9 of PWB-0579 circuit diagrams.
The IEC plug on tuner UT01 receives TV picture and Sound signals from
aerial .Tuner UT01 (Tuner-FQ1216ME/MK3) is a multi-standard TV tuner for CCIR
B/G, D/K, I, L/L’ system and the front-end has a built-in digitally (I
2
C) PLL tuning
system . (Refer to Chapter 9.2 Tuner Board Circuit)
Tuner UT01 provides the Composite Video at QT01 #Emitter and is connected
to I018 (SAA7118)L3 via P013 #10 , and then provides at output #M1of
I018 (SAA7118) . Then , it is connected to Teletext Decorder I029 (SAA5264) #23
and provides at the R.G.B. output of I029 #34
、
#33
、
#32 after processing. These 3
decorded R.G.B. signal are delivered back to I018 (SAA7118) # E1
、
#J3
、
#G1 .
AF and SIF sound from UT01 (Tuner) are applied to Audio Processor I009
(MSP3410) #47
、
#50 through P013 #6
、
#8 .
4) AV Signal
(A) Video / S-Video / Component (Y Cb Cr):
Refer to sheet 9 of PWB-0579 circuit diagrams.
Video decorder
I018 (SAA7118) is able to decode the colour of PAL , SECAM ,
and NTSC signals into ITU 601 compatible colour component values . It accepts
4 different video signals, including Composite Video ( CVBS)
、
S-Video(Y/C
Signal)
、
SCART-R.G.B. and Component Video (Y Cb/Cr :DTV 480i) . There are
4 A/D Converters at the I/O port of I018 (SAA7118) which includes 16 channel
analog inputs.
I018 (SAA7118) 16 channel analog inputs accept Video/S-Video/Component
signals from P001 / P008/ P010 / P011,P012,P014 and provides at the output of
8 bits X-port and then connected to Port V of Scaler I019 #143~#150 .
(B) Component (Y Pb Pr) :
Refer to sheet 2 of PWB-0579 circuit diagrams.
Component Signals Y PbPr are applied to I006 (AD9883-110) # 43,48,49,54
through Green/Blue/Red connectors P011/P012/P014 . I006 , AD Converter,
converts YPbPr signals to its 24bits digital format and is connected to Port B of
Scaler
I019 #8~15
、
#198~205
、
#175~182.
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