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 March 2019

LG HB905PA – SB95PA-F/S/C/W - COMPONENT REPAIR HELP

LG HB905PA – SB95PA-F/S/C/W - COMPONENT REPAIR HELP



ABNORMAL MD OPERATION
Abnormal disc reading or abnormal tray open/close. => Replace new MD and test if it is operated normally.
Component
  • Traverse assembly
  • MD junction board
  • FFC cable from main board to MD
Troubleshooting  (Countermeasure)
  1. Check the connection between main board and FFC cable, confirm the connection point.
  2. Check the connection of MD junction board cable.
  3. If all the cable connections are normal, replace the traverse assembly.
After changing MD (Traverse assembly), you must perform "SA Reset". [Refer previous post here]
HB905 series MD Top & Bottom views.
ALL BD DISC READING ERROR
  • All The Blu-ray disc is not operated, but DVD and CD are operated normally.
  • If the LDO for APC of BD laser diode is abnormal, BD doesn't work.
  • If the LD current control is abnormal, BD doesn't work.
Component
  • MD (Traverse Assembly)
  • SIC707 – Adjustable LDO
Troubleshoot
  1. Check MD (Traverse, pick-up) first of all.
  2. Check input/output voltage of LDO SIC707 (12 V, 8 V).
  3. If output voltage is abnormal, check the periphery of SIC707 and replace it.
  4. Check the BD LD Control input/output.  If input signal (LTHR_LPF) is ok But no output (LDI_BD), Check the TR SQ714, SQ716.
ALL DVD DISC READING ERROR
  • All the DVD disc is not operated, but BD and CD are operated normally.
  • If the LD current control is abnormal, DVD doesn't work.
Component
  • MD (Traverse Assembly)
  • SQ712, SQ717
Troubleshoot (Countermeasure)
  1. Check MD (Traverse, pick-up) first of all.
  2. Check the DVD LD Control input / output.
If input signal ( LDELO_LPF) is ok, but no output (LDI_DVD), check the TR SQ712, SQ717.
ALL CD DISC READING ERROR
  • All the CD disc is not operated, but BD and DVD are operated normally.
  • If the LD current control is abnormal, CD doesn't work.
Component
  • MD (Traverse Assembly)
  • SQ713, SQ715
Troubleshoot (Countermeasure)
  1. Check MD (Traverse, pick-up) first of all.
  2. Check the CD LD Control input / output.
If input signal ( LDEL1_LPF) is OK, but no output (LDI_CD), check the TR SQ712, SQ717.
ABNORMAL SERVO OPERATION
  • The actuator, spindle and sled operation of pick-up are abnormal.
  • After changing MD, the motors are abnormal operations.
  • After changing Motor Drive IC, the motors are abnormal operations
Component
  • MD (Traverse Assembly)
  • SIC706 – LM358
Troubleshoot (Countermeasure)
Check if the input/output voltage of SIC706 (Pin5 and Pin7) is 1.67 V
CLICK ON PICTURES TO MAGNIFY
Posted By: FRANK at 05:34
TAG: , , ,