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 !

Saturday, 23 February 2019

SHARP - LC37HV4U LC37HV4D SERVICE MODE

SHARP - LC37HV4U LC37HV4D SERVICE MODE



TO ENTER SERVICE MODE

     Though the best adjustment is made at shipment from factory, the following adjustment is required  if the vlue should be deviated or some adjustment is needed after replacement of parts.

  • Preperation for adjustment.  The unit need to be adjusted when the AVC system CONFIGROM (IC2202), receiver (IC2206) and HDCP key ROM [IC2208] are replaced.
  • Adjustment:  Enter the adjustment Process Mode -->VLSBIAS/15V voltage adjustment --> GRAY level /14.5V voltage adjustment --> COMBIAS adjustment --> Bacground adjustment.
  • Entry Adjustment Process Mode:  

  • Cursor Up => One item shift to Up, Shift to previous page  (At top). => adjust value one increase or execution [at W&R items].
  • Cursor Dn => One item shift to down, shift to next page [at bottom] => Adjust value one decreses or execution [at W&R items].
  • Cursor right => One item shift to right, page shift [at initial page] => One item shift to right.
  • Cursor left => One item shift to left, page shift [at initial page] => One item shift to left.
  • Enter => Test pattern Off => item execution  [at W&R items].
  • Input => Shift to next page => shift to next page.
  • Ch_Up => One item shift Up, shift to previous page [at top] => Adjust value one increases or execution [at W&R items].
  • Ch-Dn => One item shift to down, shift to next page at bottom => Adjust value one decreses or execution [at W&R items]
  • Vol_up => One item shift to right, page shift/At initial page => One item shift to right.
  • Vol_Dn => One item shift to left, page shift/ At initial page => One item shift to left.
  1. For No connection of AVC System;  With the Dispaly main power off, while pressing the 'Input' and 'Vol -ve' keys on the display body top together, turn On the display 'Main Power'.  Then starting is done at 'display' process mode.  
  2. For connection of AVC system:  With the display main power off, while pressing the 'Channel Dn' and 'Vol (+) keys on the display top together, turn on the Display 'Main Power'.  Then starting is done at 'display' process mode.  In both cases [K] is displayed on the upper left screen.  Then, when some key is pressed, the first page of 'Display adjust' mode will start.   When main Power is OFF, the adjustment process mode is relased [Exit].
  3. KEY OPERATION LIST AT ADJUSTMENT PROCESS MODE
Posted By: FRANK at 04:48
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