Service manual

SERVICE MANUAL

DC-coupled Vertical Deflection and East-West Output Circuit TDA8350Q

1. Features

·Few external components

·Highly efficient fully DC-coupled vertical output

bridge circuit

·Vertical flyback switch

·Guard circuit

·Protection against:

-short-circuit of the output pins

-short-circuit of the output pins to Vp

·High EMC immunity due to common mode

inputs

·Temperature (thermal) protection

·East-West output stage with one single

conversion resistor.

2. General Description

The TDA8350Q is a power circuit for use in 90°

and 110° color deflection systems for field

frequencies of 50 to 120 Hz. The circuit

provides a DC driven vertical deflection output

circuit， operating as a highly efficient class G

system and an East-West driver for sinking the

diode modulator current.

3. Block Diagram

Fig.14

4. Refer to Table 16 about Functions and Service Data of the IC’s Pins.