Akai 15CTF66BC, Руководство по обслуживанию

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7
z WHEN THE WHITE BANLENCE IS OK，AJUST G2 VOLTAGE TO THE SCREEN JUST
DISPLAY THE LINE
z PRESS V+ KEY WILL BE EXIT THE SC LINE MODE
MENU2
M2 PRESET
DESCRIPTION
RF.AGC 29
RF AGC
(VARIABLE 0~63)
OSD.V.POS 21 16
Vertical position of OSD
（
0~63
）
OSD.H.POS 43 18
Horizital position of OSD
（
0~15
）
OSD BRT 15 Adjust brightness of OSD
SHIPPING Shipping mode
SETUP SELECT 0 The item setup to ʻʻ1ʼʼ and press mute key
will be enter next menu
z
Receive 60dBu (1mv)VH color bar signal
，
adjust AGC value
（
voltage from high to low
）
to
picture noise reduce gradually to be just disappeared. Select “shipping”, push [V+] [V-]key to
be shipped.
5. IC’s functional description
TDA111XX & TDA121XX
Function : Main IC
SYMBOL PIN DESCRIPTION
IFVO 1 CVBS output(front-end or selected video)
VP2 2 Supply VSP(IF and sound) --(5V)
VCCAUDIO 3 Supply VSP(only sound output stage)--(8V)
PLLIF 4 IF-PLL time-constant
GND2 5 Ground VSP(IF and sound)
DECSDEM 6 Demodulator decoupling capacitor
FMDEMOUT 7 AVL capacitor,second sound IF output or
demodulated sound output
EHTO 8 EHT feedback input
AGC 9 Tuner AGC control output
IREF 10 Current reference component