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, 5 February 2019

LG BP155 NETWORK 3D BLU-RAY DISC DVD PLAYER – TROUBLESHOOTING

LG BP155 NETWORK 3D BLU-RAY DISC DVD PLAYER – Troubleshooting

LG Region-free Blu-ray DVD player LG BP155– how to troubleshoot – no booting –  network connection error – video error and more
NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor, and it will not boot-up.
IC153 (No 3.3 VA).  Replace IC153 on main board.
How to troubleshoot (Countermeasure)
1) Please check 5.1 VA of IC153 pin1 (V in).
2) If 5.1 VA is abnormal, refer to the solution 2-1 at the previous page.
3) If 5.1 VA is OK, but 3.3 VA is abnormal at the IC153 pin5 (V out), replace IC153.
NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor, and it will not boot-up.
C151 (No 3.3 V).  
Replace IC151 on main board.
How to troubleshoot (Countermeasure)
1) Please check 3.3 V of IC153 on main board.
2) If 3.3 V voltage doesn’t come out, check IC151 pin2 (5.1VA).
If there is no 5.1 VA, back to the solution 2.
3) If 5.1 VA input is normal, first of all check the PWR_CTL is high (Q501 pin2).
If PWR_CTL is high, check R172, L153, C179, C183, R173, R174, R175, R176
and if there’s no defective component then replace IC151.
4) After changing it, if the set is still not booting:
- Refer to the next page for checking another power source. (1.2 V, 1.5 V)
- Check Crystal X501.
- Check NAND flash IC (IC602).
- Check DDR IC (IC601)
- Check MPEG IC (IC501)
NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor, and it will not boot-up.
IC152 (No 1.5 V).  
Replace IC152 on main board.
How to troubleshoot (Countermeasure)
1) Check 1.5 V of IC152 pin4.
2) If 1.5 V doesn’t come out, check IC152 pin3 (3.3 V).  If there is no 3.3 V, refer to previous page.
3) If IC152 pin3 have 3.3 V, replace IC152.
NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor, and it will not boot-up.
IC150 (No 1.2 V). 
Replace IC150 on main board.
How to troubleshoot (Countermeasure)
1) Please check 1.2 V of IC150 pin11/ pin12.
2) If 1.2 V voltage doesn’t come out, check IC150 pin13 (12 VA).  If there is no 12 VA, go to previous solution to check it.
3) If 12 VA is OK, check the PWR_CTL is high and if it’s high check C167, L151, R166, R167, R168, C170, C171, C172, C173 and if there’s no defective component, please replace IC150.
4) After changing it, if the set is still not booting:
- Check 1.2 V/ 3.3 V/ 3.3 VA is normal.
- Check Crystal X501.
- Check NAND flash IC (IC602)
- Check DDR IC (IC601)
- Check MPEG IC (IC501) 
NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor,
and it will not boot-up.
3-5. X501
3-5-1. Solution
Replace X501 on main board.
3-5-2. How to troubleshoot (Countermeasure)
1) Please check the soldering status of 27 MHz crystal (X501).
2) Please check the frequency of 27 MHz crystal (X501).
3) If the crystal doesn’t oscillate, replace X501.
4) After changing it, if the set is still not booting:
- Check NAND flash IC (IC602)
- Check DDR IC (IC601)
- Check MPEG IC (IC501) 
NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor, and it will not boot-up.
(NAND FLASH MEMORY).  Replace IC602 on main board.
How to troubleshoot (Countermeasure)
1) Please check physical status of IC602 on your eyes.
2) Check the Vcc (3.3 V) of IC602 and if it’s normal please replace IC602. (Please make sure IC602 has proper program.)
3) After changing it, if the set is still not booting:
- Check DDR IC (IC601)
- Check MPEG IC (IC501) 
NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor, and it will not boot-up.
IC601 (DDR3 MEMORY).  Replace IC601 on main board.
How to troubleshoot (Countermeasure)
1) Please check 0.75 V of DDR3_VREF (C606, R607). Check 1.5 V of C613.
2) If it doesn’t work even though IC150, IC151, IC152, IC153 are no problem, IC601 (DDR memory) could have problem.
3) After changing it, if the set is still not booting:
- Check MPEG IC (IC501)
- Check main board.
NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor, and it will not boot-up.
IC501 (MPEG IC).  Replace IC501 on main board.
How to troubleshoot (Countermeasure)
1) Please check 1.2 V of C505, C506, and C507 on main board.
Please check 3.3 V of C517 and C518 on main board.
Please check 1.5 V of C515 and C516 on main board.
2) If it doesn’t work even though IC150, IC151 are no problem, IC501 MPEG IC could have problem.
3) After changing it, if the set is still no booting, check main board.
NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor, and it will not boot-up.
Main board. Replace main board.
How to troubleshoot (Countermeasure)
1) Please remove IC501 and IC601.
And then check the impedance between each signal (DATA, ADDRESS and so on).
2) If there is some impedance (a few ohm or infinite ohm) especially power source trace,
PCB via might be broken. You’d better change main board.
BAD HDMI VIDEO / AUDIO OUTPUT
When unit is connected to HDMI TV using HDMI cable, picture shows bad color, no output or mixed color on the screen. But component output is OK.
JK802 (HDMI Jack).  Replace JK802 (HDMI Jack).
How to troubleshoot (Countermeasure)
1) Check JK802 pin soldering.
2) If there is short soldering on pin JK802, re-soldering pin JK802.
3) If problem still occurs, check HDMI data:
- If all data OK, replace JK802.
- If data NG, check set on BD Mode: Replace IC501.
WIRED NETWORK CONNECTION ERROR - (OPTION PART)
When you connect online service (like Youtube or Netflix2.1) through the wired LAN, the “no connection” message appears.
JK803 (Ethernet Jack).  Replace JK803 (Ethernet Jack) on main board.
How to troubleshoot (Countermeasure)
1) Check you internet connection.  Make sure it connect properly to modem or router.
2) If internet connection OK, please check the Ethernet Jack (JK803).
3) If there is soldering problem, please re-soldering pin JK803.
4) If after re-soldering problem still occurs, replace JK803.
5) If problem still occurs after change JK803, check MPEG IC (IC501).
WIRELESS NETWORK CONNECTION ERROR - (OPTION PART)
When you connect online service (like Youtube or Netflix2.1) through the Wi-Fi, the “no connection” message appears.
Wi-Fi Module.Replace Wi-Fi module.
How to troubleshoot (Countermeasure)
1) Check you internet connection.  Make sure it connect properly to modem or router.
2) If internet connection OK, please check the CN803.
3) If there is soldering problem, please re-soldering pin CN803.
4) If after re-soldering problem still occurs, Please check CN803 pin5 (Wi-Fi 5V)
5) If there is no 5 V, please check IC191 pin6 (5 V)
6) If IC191 pin abnormal, check C191, C192, C193, R192
and there is no defective component, replace IC191.
7) After changing it, if the set is still no connection, replace Wi-Fi module.
8) If problem still occurs after change it, check MPEG IC (IC501).
Posted By: FRANK at 07:04
TAG: , ,