Service manual

SERVICE MANUAL

IC DATA AND WAVEFORMS OF KEY POINTS

(continued)

TC90A13N

3 Line Digital Y/C Separation IC

The TC90A13N and TC90A13F separate luminance

(Y) and Chrominance(c(signals from an NTSC

composite video Signal. Lt employs the Toshiba original

logical comb filter To Realize high performance Y/C

separation at low cost

1. Features

NTSC system

PLL 4X multiplication circuit

Sync. tip clamping circuit

8bit A/D converter

8bit D/A converters (2ch)

2H line memory

Dynamic comb filter

1 line dot correction circuit

Vertical enhancer

Color killer mode (Y/C separation OFF)

Chrominance wide band output mode

SDIP28/SOP28 package

5V single power supply

2. Block Diagram

Fig. 16

3.Refer to Table 13 about Functions and Service Data of TC90A13N s Each Pin.