Vestel 17ips12 Schematic Access

Vestel 17IPS12 Schematic: The Ultimate Repair and Troubleshooting Guide

Block 5: Backlight LED Driver (Inverter Section)

• Driver IC: Often OZ9976 or BD9488F.
• Boost MOSFET: Q850 (e.g., 12N50).
• Boost Diode: D850 (fast recovery).
• Feedback: Current sense resistors (R860–R865, low ohm, often go open).

Symptoms of failure: Backlight flashes once then off, audio present but no picture.

Common TV Models Using 17IPS12:

• Toshiba 32LV713G, 40LV713G
• Hitachi 32HKX9, 40HKX8
• Finlux 32F6030, 40F7030
• JVC LT-32C890, LT-40C895
• Polaroid 32GSR3000
• Various Vestel branded chassis (e.g., 17MB82, 17MB120 mainboards)

1. Free Online Repair Databases

• ElektroTanya (elektrotanya.com): The best free source. Search for "17IPS12". You’ll often find service manuals containing the schematic. Look for files named "Vestel 17IPS12 Power Supply Schematics.pdf".
• Badcaps.net forums: Electronics repair forum members frequently upload schematics. Search the “Power Supply” section.
• ManualsLib (manualslib.com): Sometimes includes the full TV service manual, which contains the PSU schematic.

Understanding the Vestel 17IPS12 – Key Info & Schematic Overview

The 17IPS12 is a combined Power Supply + LED Backlight Driver board. It’s used in 32” to 43” LED TVs.
Main ICs: vestel 17ips12 schematic

• U1 – SSC3S910 (main switching controller – quasi-resonant / LLC)
• U2 – A6069H (standby power controller)
• U3 – MAP3204 (LED driver controller)
• U4 – LM358 (op-amp for feedback/protection)

4. Firmware Logic (Pseudo-Code)

#include <avr/io.h>
#include <util/delay.h>
void init_pwm()  (1 << WGM01)
uint16_t read_light()  (1 << MUX0); 
    ADCSRA = (1 << ADEN)
int main(void) 
    init_pwm();
while(1) 
        uint16_t light_level = read_light();
        // Simple linear mapping for safety
        // Prevent total darkness to keep user aware TV is on
        uint8_t brightness = (light_level >> 2); 
        if (brightness < 50) brightness = 50; // Min brightness
OCR0B = brightness; // Set PWM Duty Cycle
        _delay_ms(100);

Reading the 17IPS12 Schematic: Key Sections

Once you have the PDF schematic, open it with a PDF viewer and zoom into the following five critical blocks: Driver IC: Often OZ9976 or BD9488F

Circuit Architecture Analysis

Understanding the schematic requires breaking the board down into its four primary stages: Symptoms of failure: Backlight flashes once then off,