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 !

Wednesday, 20 March 2019

SONY KP57HW40 - LED BLINKING CODES - RESET TO FACTORY PRESET CONDITIONS

SONY KP57HW40 - LED BLINKING CODES - RESET TO FACTORY PRESET CONDITIONS


BLINKING CODES
  • When a malfunction occurs the TIMER/STAND BY indicator only blinks for one of the following diagnosis items. In case oftwo or more malfunctions, the item which first occurred blinks. If the malfunctions occurred simultaneously, the item with the lower blink count blinks first.
  • The screen display displays the results regarding all the diagnosis items listed below. The display “ 0 ” means that no malfunctions occurred.
  • One blink is not used for self-diagnosis.
SELF DIAGNOSIS SCREEN
Screen Display Method
  • Quickly press the remote command button in the following order from the standby state.
  • DISPLAY  à Channel 5 à VOL  –   à POWER
  • In cases of malfunctions where it is not possible to determine the symptom such as when the power goes off occasionally or when the screen disappears occasionally, there is a screen display on whether the malfunction occurred or not in the past (and whether the detection circuit operated or not) in order to allow confirmation.
  • The results display is not automatically cleared. In case of repairs and after repairs, check the self-diagnosis screen and be sure to return the results display to “0 ”.
  • If the results display is not returned to “0 ”it will not be possible to judge a new malfunction after completing repairs.
Method of Clearing Results Display
  • Power off (Set to the standby mode)
  • DISPLAY à Channel 5 àVOL +  à POWER (Service Mode)
  • Channel 8 à ENTER (Test reset = Factory preset condition).
Method of Ending Self Diagnosis Screen:  turn the power switch OFF on the remote commander or the main unit.
SELF DIAGNOSIS FUNCTION OPERATION
  • OCP Low B and +B line detect DET SHORT, and shut-down POWER ON RELAY.  Reset by turning power on/off.  In case of +B is loaded approx. 1.5A or more, microcomputer detects it via IC5005
  • OVP In case of +B becomes approx. 150V or more, POWER ON RELAY shuts down and microcomputer detects it via IC5005.  Reset by turning power on/off just the same as OCP.
  • Low B Occurs when set +5V is out
  • V Stop In case of V Drive disappeared, Q8001 detects it and shut-down POWER ON RELAY. Microcomputer detects it and makes LED blinking.
  • AKB IK detection. Makes LED blinking in case of microcomputer doesn’t detect IK returns of IC309 (CXA2150AQ) 20 seconds or more.
  • H Stop In case of H DRIVE is disappeared, Q378 detects it and shut-down POWER ON RELAY shuts down.  Microcomputer receives H Stop data from Q378 and makes LED blinking.
  • HV Stop In case of HV becomes 33KV or more. IC8006 detects it and shut-down.  POWER ON RELAY. Microcomputer makes LED blinking.
  • Audio In case of DC component overlaps the output of Audio Amp., POWER ON RELAY shuts down.  Microcomputer detects it and makes LED blinking.
Click on image to Enlarge
Posted By: FRANK at 02:55
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