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.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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, 19 February 2019

FUJITSU PDS-4233W/E-H _ PDS-4234W/E-S _ BLINKING CODES AND TROUBLEHOOTING.

FUJITSU PDS-4233W/E-H _ PDS-4234W/E-S _ BLINKING CODES AND TROUBLEHOOTING.



TROUBLESHOOTING USING LED & OSD


LAMP STATE
POWER SUPPLY STATE
REMEDY
Not lighted
Power supply circuit faulty.
Replace Power Supply PCB # {Vs & Vd must be adjusted}
Blinks RED [continiously]
Power turned off immediately.
Check-1 [stated below]
Blink once RED.
Power turns off after 10 seconds.
Check 2 [stated below]
Blinks twice RED.
Power turned off after 10 seconds
Check 3 [stated below]
Blinks four times RED.
Power not turned off, LED blinks only
Replace Main/Digital PCB assy.
Blinks five times RED.
Power not turned off, LED blinks only.
Replace Video PCB Assy.
LED lights steady for more than 10 seconds [GREEN]


Is on screen display normal?  If NO:
PDP panel faulty
Replace PDP panel
Is on screen display normal?  If YES


All input image faulty.
Signal processing PCB faulty.
Replace Main/Digital PCB assy.
Video input image faulty.
Video PCB faulty.
Replace Video PCB Assy.
s-video input image faulty.
Video PCB faulty.
Replace Video PCB Assy.
Component video input image faulty.

RGB 1,2, input image faulty.
Signal processing PCB faulty.


Check 4
Replace Main/Digital PCB Assy.

Stated below.

CHECK-1

START >>  [Power supply protector operated.  Power Lamp Flashing continuously in RED; at an interval of (0.5) sec.]

  1. Turn the main power off and disconnect the connector P2,P3,P4 & P6 on the Main Power PCB.
  2. Connect pin [1] and pin [13] of (P2) through a [1/4W, 1Kohms] resistor.
  3. Turn the main power ON again.
  4. Measure during telay turning On and OFF.

Is voltage at connector [P5] pin 10(Vs) 160V and pin 7(VD) 65V on main power board?  If YES, PDP panel is faulty.  Repalce it. [*Vs & Vd must be adjusted after replacement]

If NO: Power supply PCB is faulty.  Replace it. * Vs & Vd must be adjusted]



CHECK 2

Start >> Power lamp flashes once intermittently in RED; for (0.5) second, at an interval of 3 seconds.

Start:

Is voltage at connectors [P951-3 pin; P953-3 pin and P954-3 pin] on Main/digital PCB 14V?
If NO; Microcomputer peripheral circuit faulty.
Replace Main/Digital PCB Assy. 

If YES; fan faulty.  Replace fan.

CHECK 3

Temperature protector operated.  Power Lamp flashes intermittently twice in RED; for (0.5) sec. At an interval of 5 seconds.

Start >>
Is ambient temperature of IC747 on  Main/Digital PCB less than 60 degree centigrade? If NO: adjust PDP unit installation so that perefearal temperature is 40 Degree Centigrade or less.
Does the unit operate normally when temperature sensor IC757 changed?
If No:  microcomputer perifearal circuit faulty.  Replace Main/Digital PCB Assy.
If YES:  temperature sensor IC757 faulty.  Replace temperature sensor IC757.
[The temperature sensor IC is installed on Main/digital PCB.  Turn OFF power and cool with a point cooler]


CHECK 4

RGB input is abnormal.  The power lamp lighted green for 10 seconds or more.

Start>>
  1. Is RGB cable pin arrangement appropriate?  Inf NO, check connection cable.
  2. If RGB cable pin arrangement is appropriate?  If YES
  3. What kind of signal is output from signal source?
  4. Separate signal.  Is horizontal sync. Sgnal input tp pin 13 and vertical sync signal input to pin 14 of RGB cable is OK?
  5. If not, check input signal.  If Yes, ronnect the RGB cable to terminal.  Is sync. Switch (TLL/ANALOG) selected correctly?
  6. If YES; check Sync signal polarity is negative.  If YES;
  7. Is frequency of horizontal sync and vertical sync signals within specified range?  If no, check input signal.  If yes, check whether the input level is within specified range.  If it also is okey, Signal processing circuit is faulty.  Repalce Main/digital PCB Assy.
  8. Come to [3] of above.  Composite signal.
  9. Is composite sync. Signal input to pin13 of RGB cable?  If YES; go to step-5 above and proceed. If NO, check input signal.

NB: If the synchronizing signal cannot be identified bu TTL level, it is in the 75 Ohms terminated state
Posted By: FRANK at 06:49
TAG: , ,