Color TV circuit diagram using TDA9341 IC 14 and 21 inch

Color TV circuit diagram using TDA9341 IC 14 and 21 inch – Service mode Memory IC replacement

TDA9341 – AT24C08 - CD4052 – AN7522 – TDA2003 – [LOT BSC25-N0832/BSC25-T1010A/BSC24-01N4014K] – Transistorized SMPS

FBT variations: FOR 29”

BSC26-01-N4010F BSC26-N2143

BSC26-01N4010E BSC26-N2148

BSC26-01N4004F BSC26-01N

REPLACEMENT OF MEMORY IC

This TV circuit uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits.

When replacing memory IC, be sure to use IC written with the initial value of data.

PROCEDURE FOR REPLACING MEMORY IC

(1) Power off

Switch the power off and unplug the power cord from AC outlet.

(2) Replace IC

Be sure to use memory IC written with the initial data values.

(3) Power On

Plug the power cord into the AC outlet and switch the power On.

(4) Check and set system default value:

1) Press “MENU” key followed by digits '6''4''8' and '3'. Then Press “TEST” key on the Remote control unit for factory used.

2) The red “M”or”factory” will be displayed on the screen, repeat this and it will changed as follow:

normal-M(factory)-BUS open-normal..

3) Press digital key, (Mkey) and corresponding on-screen display will be appeared.

4) Check the setting value of the SYSTEM default value of Table below. If the value is different, select items by [CH+]/[CH-] keys and set value by VOL+]/[VOL-] keys.

5) Press “STANDBY” key again and return to the normal screen.

Circuit diagram and PWB

BUS CONTROL ADJUSTMENT

TDA9351/9353: to enter BUS control mode, Press “MENU” key followed by digits '6''4''8' and '3'. Then press digit Press “0” to “9“ key, (Mkey) and corresponding on-screen display will be appeared.

TDA8370: to enter BUS control mode, Press “MENU” key followed by digits '6''4''8' and '3'. then Press “TEST” key on the Remote control unit twice for factory used(or press digits '6''4''8' and '3' twice.) and then press digit Press “0” to “9“ key, (Mkey) and corresponding on-screen display will be appeared.

On TV screen “TEST” will be indicated, this means entered bus control mode.

And press following key, each function will be available.

Comments

OP AMP INTEGRATOR CALCULATOR

Enter the Input Voltage,Vin: Volts Enter the Frequency, f: Hertz Enter the Input Resistance, Rin: Ohms Enter the Value of Capacitor, C: Farads Output Voltage, Vout: Volts OP AMP based Integrator Tutorial and Design

Block diagram of AM transmitter and receiver with explanation

Block diagram of AM transmitter and receiver with explanation AM Transmitter : Transmitters that transmit AM signals are known as AM transmitters. These transmitters are used in medium wave (MW) and short wave (SW) frequency bands for AM broadcast. The MW band has frequencies between 550 KHz and 1650 KHz, and the SW band has frequencies ranging from 3 MHz to 30 MHz. The two types of AM transmitters that are used based on their transmitting powers are: · High Level · Low Level High level transmitters use high level modulation, and low level transmitters use low level modulation. The choice between the two modulation schemes depends on the transmitting power of the AM transmitter. In broadcast transmitters, where the transmitting power may be of the order of kilowatts, high level modulation is employed. In low power transmitters, where only a few watts of transmitting power are required , low...

Using the TLP250 Isolated MOSFET Driver Explanation and Example Circuits

I’ve already shown how to drive an N-channel MOSFET (or even an IGBT) in both high-side and low-side configurations in a multitude of ways. I’ve also explained the principles of driving the MOSFETs in these configurations. The dedicated drivers I’ve shown so far are the TC427 and IR2110. Some people have requested me to write up on MOSFET drive using the very popular TLP250. And I’ll explain that here. The TLP250, like any driver, has an input stage, an output stage and a power supply connection. What’s special about the TLP250 is that the TLP250 is an optically isolated driver, meaning that the input and output are “optically isolated”. The isolation is optical – the input stage is an LED and the receiving output stage is light sensitive (think “photodetector”). Before delving any further, let’s look at the pin configuration and the truth table. Fig. 1 - TLP250 Pin Configuration Fig. 2 - TLP250 Truth Table Fig. 1 clearly shows the input LED side and the receiving photodetector as well...

Do More

Search This Blog