Akai LM-H30CJSA, Service Manual

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3) TV Signal
Refer to sheet 4
、
8
、
9 of PWB-0663 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 P030 #1 , and then provides at output #M1of
I018 (SAA7118) . Then , it is connected to Teletext Decorder I011 (SAA5264) #23
and provides at the R.G.B. output of I011 #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 I044
(MSP3410) #47
、
#50 through golden finger PT01 #27
，
28
、
#25
，
26 and P019 #15,#17
on main Board.
4) AV Signal
(A) Video / S-Video / Component (480i , 525i , 625i):
Refer to sheet 9 of PWB-0663 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 . 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 PI01 / PI08/ PI10 / PI02,PI03,PI04 and provides at the output of 8
bits X-port and then connected to Port V of Scaler I019 #143~#150 .
(B) Component (480p , 525p , 625p) :
Refer to sheet 2 of PWB-0663 circuit diagrams.
Component Signals Y PbPr are applied to I006 (AD9883-110) # 43,48,49,54
through Green/Blue/Red connectors PI02/PI03/PI04 . 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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