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 !

Friday 15 May 2020

SAMSUNG UN43TU8000F CHASSIS: UWK00 - HOW TO DISCHARGE THE CAPACITORS BEFORE REPAIR, HOW TO DISASSEMBLE AND POWER SUPPLY UNIT TROUBLESHOOTING

Applicable to: Samsung LED TVs: UN43TU8000F, UN50TU8000F, UN55TU8000F, UN65TU8000F, UN75TU8000F, UN85TU8000F

Before Removing SMPS board, Discharge Capacitors
• 43 inches

You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below.
If LED ON -> LED OFF, Discharge is completed.
Then verify voltage is less than 10Vdc across leads with Volt Meter.

• If LED ON > LED OFF discharge is completed.

Then verify voltage is less than 10Vdc across leads with Volt Meter.

Fig-50 inches
You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below.
If LED ON -> LED OFF, Discharge is completed.
Then verify voltage is less than 10Vdc across leads with Volt Meter.
Discharge JIG
• If LED ON > LED OFF discharge is completed. Then verify voltage is less than 10Vdc across leads with Volt Meter.



55 inches
You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below.
If LED ON -> LED OFF, Discharge is completed.
Then verify voltage is less than 10Vdc across leads with Volt Meter.
• If LED ON > LED OFF discharge is completed.

Then verify voltage is less than 10Vdc across leads with Volt Meter.

65 inches
You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below.
If LED ON -> LED OFF, Discharge is completed.
Then verify voltage is less than 10Vdc across leads with Volt Meter.
Discharge JIG
• If LED ON > LED OFF discharge is completed.

Then verify voltage is less than 10Vdc across leads with Volt Meter.

75 inches
You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below.
If LED ON -> LED OFF, Discharge is completed.
Then verify voltage is less than 10Vdc across leads with Volt Meter.
Discharge JIG
• If LED ON > LED OFF discharge is completed.

Then verify voltage is less than 10Vdc across leads with Volt Meter

85 inches
You have to discharge the SMPS by using service JIG across leads of Large Capacitors as pictured below.
If LED ON -> LED OFF, Discharge is completed.
Then verify voltage is less than 10Vdc across leads with Volt Meter.
Discharge JIG
• If LED ON > LED OFF discharge is completed

Then verify voltage is less than 10Vdc across leads with Volt Meter.

Disassembly

1. Push and hold down BLU connector tab to release it’s panel lock connection.

2. Lift to release the lock tab on upper left side of Board. (Step 4 will assist)

3. Locate a notch in insulation sheet. (not all models)

1. Push and hold down BLU connector tab to release it’s panel lock connection.

2. Lift to release the lock tab on upper left side of Board. (Step 4 will assist)

3. Locate a notch in insulation sheet. (not all models)

4. Use Open Jig in notch to help release & smoothly slide SMPS to the Right. (While pushing BLU Tab & Releasing Lock Tab)

Power Troubleshooting

 FUNCTION/IR Control Test

1. Place TV in Power Standby
2. Check LED Status
3. If LED is OFF
 Check LED 1.7Vdc (pin 14 ) and VCC for 5Vdc (pin 4 )
→ If missing suspect Function Assy/Cable/Main board.
4. If LED is ON
 Check Switch Operation activates on screen display.

If missing:
 Check KEY_INPUT1 (pin 11 ) change to 0V with a command.
• If wrong voltage or no change:
 Check Switch for stuck or miss-operation.
5. Check IR (pin 10 ) operation with Standard Remote command changes. (5V to 3.3V effective DC)
6. Check SDA (pin 17 ), SCL (pin 15 ) for effective 5Vdc (after power on)
→ If missing suspect Function Assy/Cable Assy/Main Assy.

FUNCTION/IR Control Test of Function/Wi-Fi /BT Module

1. Place TV in Power Standby
2. Check LED Status
3. If LED is OFF
Check LED (pin 17 ) and VCC for 5Vdc (pin 7 )
→ If missing suspect Function Assy/Cable/Main board.
4. If LED is ON
Check Switch Operation activates on screen display.

If missing:
Check KEY_INPUT1 (pin 11 ) change to 0V with a command.
• If wrong voltage or no change:
 Check Switch for stuck or miss-operation.
5. Check IR (pin 10 ) operation with Standard Remote command changes. (5V to 3.3V effective DC)
6. Check SDA (pin 14 ), SCL (pin 13 ) for effective 5Vdc (after power on)
→ If missing suspect Function Assy/Cable Assy/Main Assy.

Power supply board (SMPS) connector voltages. – 43 and 50 inches

55 and 65 inches

75 and 85 inches

 

Samsung UN43TU8000 43" Crystal 4K Ultra High Definition Smart TV - Crystal Processor 4K - Tizen Powered Smart TV - Crystal Display - HDR - Energy Star Certified - UHD 8 Series - Flat Panel - Slim Feet Stand Style - 120Hz Motion Rate - Dolby Audio - PurColor Technology - Bluetooth Capable - Wi-Fi Capable - 2.0 Channel Speakers - Woofer in Speaker - 20W Speaker Output Power - Multi Room Link - Smart Hub - Bixby - Voice Activated Assistant Capabilities - Game Mode - V-Chip - Electronic Program Guide - Connect Share - InstaPort S - Closed Captioning - TV-Mobile Mirroring - Auto Power Off - 3 HDMI - 2 USB - Ethernet - 1 RF Input - 1 RS-232C - 1 Digital Audio Out - Wall Mountable (200 x 200) - Remote Control Included - (44.0"W x 9.9"D x 28.3"H) - (Black) with a Samsung HW-Q800T 3.1.2 Channel Soundbar and Subwoofer - Dolby Atmos - DTS:X Technology - 8" Subwoofer - 330W Power - Wi-Fi Connectable - Bluetooth Connectivity - Adaptive Sound - Wide Range Tweeter - Game Pro Mode - Center Channel Speakers - 2 HDMI - 3D True Surround Sound - Samsung Acoustic Beam - Voice Activated Assistant - 8 Built-In Speakers - 4K Passthrough - SmartThings App Compatible - Dolby Digital Plus - Q-Symphony - Wall Mountable - (38.6"W x 15.9"D x 15.9"H) - (Black) (2020)TV Customizable Bundle, LCD 4K, 43 Inch, Black, UHD, Smart TV, Soundbar

Posted By: FRANK at 11:38