REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Tuesday, 5 February 2019

LG FLATRON L1510M LCD MONITOR CIRCUIT DIAGRAM SCHEMATIC

Flatron L1510M LG LCD monitor Circuit Diagram Schematic

Used ICs TDA7496  TDA7449  MTV312  24LC08B  THC63LVDM83R
Type : TFT XGA LCD Module
Size : 352.0(H) x 263.5(V) x 14.0(T)
Pixel Pitch : 0.297mm x 0.297mm
Color Depth : 8Bits/ 16M colors
Active Video Area : 15.0 inch (304.128 x 228.096)
Schematic
SMPS
MICOM
LVDS
Audio
Block diagram and description
Scaler One chip IC(GMZAN-2, U201)
GMZAN-2 (U201) is one chip IC which it supports four internal function blocks of Video Amp, PLL, A/D converter and Video processor.  Video signal (0.7Vp.p) clamped through C209, 208, 207 with matching IC’s proper cut off voltage.  This signal is processed as a proper 8 bit digital signal by U201’s amplifying, phase locking, A/D converting, and scaling operations. U201 generates Clock, Horizontal and Vertical sync, Data Enable signals as LCD Panel’s input signals.
2. System Controller (Microprocessor) Circuit
1) Microprocessor (U501) distinguishes polarity and frequency by calculating horizontal and vertical sync input from signal source.
2) Microprocessor (U501) carries out power control by sending power-down trigger signal to each IC.
3) Microprocessor (U501) communicates with EEPROM (U502), and GMZAN-2 (U201) through IIC(2 lines) or 6 bit bus line. It makes all devices operated properly.
4) Microprocessor (U501) let User adjust screen by OSD function.
3. LVDS(Low Voltage Differential Signal, U402)
LVDS transmitter (U402) delivers digital signal to the receiver inside LCD module by method of abstraction. The abstracted signals are pairs of RIN0+-, RIN1+-, RIN2+-, RIN3+-, and RCLKIN+- of which voltage swing is 0.5V each.  When SHUTON pin’s input is High, transmitter goes to power down mode.
4. DC/DC block
This block is composed of regulators which supplies 2.5V, 3.3V, and 5V.  Each regulator’s source power is 5VS and 12V from power block. U806 supplies 2.5VD, U802 supplies 3.3VD, 3.3V_AD, and 3.3V_PL powers to GMZAN-2’s internal PLL, ADC, Pre-amp, and scaler by dropping down 5VS from power block.  U805 supplies MODPWR-3.3V for LCD module’s operation by dropping down 5VS from power block. U803 supplies 5VR for Microprocessor and Logic IC(U701)’s operation by dropping down 12V from power block.
5. Power Block
This block supplies DC voltages of 5VS and 12V by converting AC input voltage of 100~240Vac. Converting method is SMPS (Switching Mode Power Supply).
6. Audio Part (TDA7449, TDA7496L)
In the circuit, audio processor(TDA7449) which is controlled by microprocessor(U501) adjust volume/treble/bass/balance of audio signal which come from PC.  The signal come from TDA7449 is amplified by TDA7496L. The final output signal is output through speaker
Posted By: FRANK at 07:16
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