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, 16 February 2019

SONY KDSR50XBR1 KDS-R60XBR1 BLINKING LED - TROUBLESHOOTING


SONY KDSR50XBR1 KDS-R60XBR1 BLINKING LED - TROUBLESHOOTING



LAMP DRIVE ERROR [5X] (AKA LAMP POWER SUPPLY BLOCK) {5 Blinks}
Five flash pattern; Lamp Driver.
     This error indicates loss of 12KV High Voltage Output (Lamp ignition Voltage) from the Lamp Driver Board.  The main objective when troubleshooting this error is to isolate to one of four areas.
  1. The Lamp.
  2. The Main Power Supply [G-Board]
  3. The Lamp Driver Board [Lamp power supply block]
  4. The TV microprocessor [ASU-Board].
     A completely open circuited lamp can cause a 5X flash pattern.  Therefore the very first component to eliminate from the suspect is the 'Lamp'.
     Does the Spark Gap light?  3 attempts 20 seconds intervals.
     Visually check the spark gap on the Lamp Driver board for illumination during TV initial power-on process.  In normal operation the spark gap will flash approximately 5 seconds after the ON button is pressed, and the green LED begins flashing.  It should flash once and the Lamp will Light.
     If the spark gap flashes three times with a 20 second pause in between flashes, the Lamp Drive is functioning properly, and the Lamp is defective.  Replace the Lamp.
     If the spark gap does not illuminate, then the next step is to check the [380V] lamp driver supply [G-Board].  Measure this voltage directly at Lamp Driver Board at the (X1) connector at the top of the board.  If this [380V] is missing, the power supply [G-Board] is defective.  Replace the G-board.
     If (380V) is present then the next step is to check Lamp-On Control Voltage from the TV microprocessor [ASU-Board].  Measure this control voltage at CN2390/pin 4 on the ASU board.  The voltage should initially be at [3.3V] while the Green LED is flashing, and then go low to approximately [0.13V], when the Green LED glows steady.
     If the Lamp-On control voltage transitions from 3.3 to 0.13V properly, then the TV microprocessor is instructing the Lamp Driver to Turn-On.  At this point the Lamp Driver is receiving its 380V supply voltage and its Lamp-On voltage, however, the lamp driver does not function {No spark gap}.  In this case replace the Lamp Driver Board.
If the Lamp-On voltage does not go low [0.13V], then the problem is with the TV microprocessor, replace the ASU | DSU assembly
Posted By: FRANK at 07:28
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