Samsung SCC-B2300 Service Manual - Page 77

Filter and Video Dri e Amp System

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Circuit perating escription 13-1-5 Filter and Video Dri e Amp System 1) Y(IOY) Signal is DC Blocked at C152 and goes to Video Driver.(IC113-2 : XIOY) 2) C(IOC) Signal's current is amplified at Q107, and filtered by BFP(Band Pass Filter) at C150, L106, C151, then goes to Video Driver(IC113-4 : XICO). NTSC • NTSC system's C150 value : 68pF • PAL system's C150 value : 33pF 3) Y and C signal which are input to Video Driver(IC113) amplify by 6dB and goes to IC113-7(VOUT). 4) This signal(VOUT) is passed through C153 which does DC Blocking function and R170/R171 which functions as Impedance Matching(75Ω), and output to BNC CONNECTOR of READ BD. Supplying VOUT to IC113-6 through C154 is for eliminating the SAG signal of VIDEO(VOUT). Samsung Electronics

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Circuit
perating
escription
Samsung Electronics
13-1-5 Filter and Video Dri e Amp System
1)
Y(IOY) Signal is DC Blocked at C152 and goes to Video Driver.(IC113-2 : XIOY)
2)
C(IOC) Signal's current is amplified at Q107, and filtered by BFP(Band Pass Filter) at C150, L106, C151, then
goes to Video Driver(IC113-4 : XICO).
NTSC
•
NTSC system's C150 value : 68pF
•
PAL system's C150 value : 33pF
3)
Y and C signal which are input to Video Driver(IC113) amplify by 6dB and goes to IC113-7(VOUT).
4)
This signal(VOUT) is passed through C153 which does DC Blocking function and R170/R171 which functions
as Impedance Matching(75
Ω
), and output to BNC CONNECTOR of READ BD. Supplying VOUT to IC113-6
through C154 is for eliminating the SAG signal of VIDEO(VOUT).