akira CT-21XF9, Service Manual

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Model No: CT-21XF9A
Version 1.0
MAIN ICS DESCRIPTION AND REPAIR DATA OFFERING
1. INTRODUCTION FOR IC TB1238AN (N201)
TB1238AN is a PAL/NTSC system color TV specific monolithic IC currently developed by Toshiba
Co., which is controlled by Inter IC Bus. TB1238AN includes a picture IF processing circuit, a sound
IF processing circuit, PLL video detection circuit, PLL sound frequency discrimination circuit, a
luminance signal processing circuit, PAL/NTSC chroma signal processing circuit and RGB signal
processing circuit. TV/AV switching circuit and Horizontal/Vertical scanning small signal processing
circuit etc.
Figure 7 shows the inner structure block diagram of TBI238AN.
The pin functions and repair data of TB1238AN is listed in the Table 3.