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!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Monday 25 March 2019

LG 19LE3300 _ 19LE3308 _ 19LE3310 _ 19LE330N _ V-COM ADJUSTMENT

LG 19LE3300 _ 19LE3308_19LE3310_19LE330N _ V-COM ADJUSTMENT


V-VOM ADJUST [ONLY LGD (M+S) MODULE
PURPOSE

  • The Vcom (Common Voltage) is a Reference Voltage of Liquid Crystal Driving.  > Liquid Crystal need for Polarity Change with every frame.
  1. Press the PIP key of th ADJ remote control.(This PIP key is hot key to enter the VCOM adjuting mode).  (Or After enter Service Mode by pushing “ADJ” key, then Enter V-Com Adjust mode by pushing “G” key at “10. VCom”)
  2. As pushing the right or the left key on the remote control, and find the V-COM value which is no or minimized the Flicker. (If there is no flicker at default value, Press the exit key and finish the VCOM adjustment.)
  3. Push the “OK” key to store value. Then the message “Saing OK” is pop.
  4. Press the exit key to finish VCOM adjustment.




                                              (Visual Adjust and control the Voltage level)

OUTGOING CONDITION CONFIGURATION
  • When pressing IN-STOP key by SVC remocon, Red LED are blinked alternatively. And then Automatically turn off.  (Must not AC power OFF during blinking)
INTERNAL PRESSURE
  • Confirm whether is normal or not when between power board’s ac block and GND is impacted on 1.5 kV(dc) or 2.2 kV(dc) for one second.
MODEL NAME AND SERIAL NUMBER [D/L]
  1. Press “Power on” key of service remocon. (Baud rate : 115200 bps)
  2. Connect RS232 Signal Cable to RS-232 Jack.
  3. Write Serial number by use RS-232.
  4. Must check the serial number at the Diagnostics of SET UP menu. (Refer to below).


SIGNAL TABLE DETAILS
CMD : A0h
LENGTH : 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 +…+ Data_n
Delay : 20ms

COMMAND SET
No.
Adjust mode
CMD(hex)
LENGTH(hex)
Description
1
EEPROM WRITE
A0h
84h+n
n-bytes Write (n = 1~16)
DESCRIPTION:
  • FOS Default write : <7mode data> write
  • Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0, Phase
  • Data write : Model Name and Serial Number write in EEPROM.
METHOD AND NOTICE
  • Serial number D/L is using of scan equipment.
  • Setting of scan equipment operated by Manufacturing Technology Group.
  • Serial number D/L must be conformed when it is produced in production line, because serial number D/L is mandatory by D-book 4.0.
Posted By: FRANK at 03:36
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