Daewoo DTD-25G1 ME, Service Manual

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APPENDIX
TB1251CN
PAL/NTSC/SECAM 1CHIP ( IF + VCD PROCESSOR ) IC
The TB1251N is a TV signal processor IC, which contains
PIF, SIF, Video, Chroma and deflection signal processors
for worldwide Multi-color systems. Also, it has V and EW
geometric correction Outputs.
The line-up and flexibility of this TB1251 series contributes
to reduce development costs and components in a TV
sets.
FEATURES
IF STAGE
• Multi-system IF
• SIF 4.5 ~ 6.5 MHz
• One External BPF for Multi-SIF carrier
• Inter/Sprit carrier inputs
• V C O tank coil alignment free
• for L system,
Positive demodulation
V low Ch
AM Sound demodulation(Sprit carrier)
VIDEO STAGE
• Built-in Y delay line (8 adjustable steps)
• Built in C trap filter (Swithable)
• VSM output
CHROMA STAGE
• Multi-color Demodulation
• Automatic Chroma Identification
• 1 Xtal for Multi-color Systems
(3.58MHz/4.43MHz/M-PAL/N-PAL)
• Built-in 1H Delay line
• Cb/Cr input
• Built-in BPF/TOF
• Fsc Output
• Two NTSC demodulation phase
TEXT STAGE
• Built-in AKB
AKB on/off
AKB Color temperature control
• Analog RGB interface
• ABL / ACL
DEFLECTION STAGE
• Built-in H-VCO
• V/EW geometric corrections
• Stand Along Sync input
• Sand Castle Pulse Output
(HD+VD+Gate Pulse)
SDIP56-P-600
Weight : 5.55g (typ)
IC DESCRIPTION