Circuit Descriptions; Overall System Diagram; Ac Input & Power Circuit - Samsung SW85ASP Service Manual

13. CIRCUIT DESCRIPTIONS

13-1. OVERALL SYSTEM DIAGRAM

13-2. AC INPUT & POWER CIRCUIT
Description
Generates and supplies 12V or 5V, required respectively for the AC power supply or disconnection.
Operation
- The AC Power 120V (or 220-240V used at any country) applied to the primary transistor will be transformed into
AC12V for the secondary transistor.
- The AC 12V is converted into DC 12V by D2~ D5.
- DC 12V is transformed into DC 5V on 7805.
13-1