Tektronix TDS3xxx replacing backlight, power supply, fan etc. HDMI out. (photos) - Page 1
Forum section: electronics / testgear

author: JusTideaFIX
author_rank: Contributor
timestamp: September 12, 2023, 09:15:00 am
content: Backlight replacement (CCFL to LED):CCFL lamps have aged and become too dim. For replacement, a ready-made monitor repair kit was purchased. LED strips (width 3 mm) cut to size (27 LEDs). There is a resistor on the board to regulate the current consumption of the LEDs. Power is taken from the accessory port 15V (not used).I did not use the brightness control circuit. Consumption was 3 watts.Same replacement:https://www.eevblog.com/forum/repair/tds3000-series-ccfl-upgrade-to-led/msg3853634/#msg3853634

author: JusTideaFIX
author_rank: Contributor
timestamp: September 12, 2023, 09:41:03 am
content: Replacing the power supply:The original power supply finally failed and a decision was made to completely replace it. The oscilloscope is powered by 15 volts with a power of 30 watts. MEAN WELL RPS-60-15 was chosen as a replacement.Since the power supply board is a supporting structure, an adapter plate was made on a laser cutter.Another replacement:https://www.eevblog.com/forum/testgear/tektronix-tds3052-(tds3000-series)-psu-replacment/msg3449214/#msg3449214

author: JusTideaFIX
author_rank: Contributor
timestamp: September 12, 2023, 10:02:13 am
content: Fan replacement:The cooling fan has expired and started making annoying sounds. For the sake of efficient cooling with maximum silence, I chose Noctua NF-B9 [NF-B9-REDUX-1600] 3-pin (without PWM) 92x92mm.Resistors slightly reduced the rotation speed.

author: JusTideaFIX
author_rank: Contributor
timestamp: September 12, 2023, 10:41:29 am
content: Cleaning encoders:As encoders age, they begin to malfunction. This makes it very difficult to use the oscilloscope. It is almost impossible to find a replacement. The design does not imply disassembly.Of course, you can remove the rivets and clean encoders thoroughly. And then think about how to install the encoders in place. BUTSince the contacts are located directly on the printed circuit board, all you need to do is:Tilt the board 45 degrees. Pour isopropyl alcohol 99,97% into the gap between the board and the encoder, one drop at a time until it flows from the other side. Rotate the encoders. Tilt the board perpendicular to the horizon. Collect escaping isopropanol with a tissue. Repeat 2-3 times.Same problem:https://www.eevblog.com/forum/testgear/tds3000b-tds3054b-rotary-encoder-repairreplacement/msg3578292/#msg3578292

author: JusTideaFIX
author_rank: Contributor
timestamp: May 16, 2024, 06:30:33 pm
content: Creating a video signal converter to output video to HDMI for TDS30xxB.In the attached file "HDMI(DVI)Transmitter Project.7z" you will find the 4 layer board design (Altium). gerber files and 3D model.In my case, the illumination of the matrix was changed from CCFL to LEDs. Therefore, the inverter board was removed and the transmitter board was installed in its place.An adapter plate was made for the connector. The HDMI connector is installed instead of the LPT.R0..3=R4..7, G0..3=G4..7, B0..3=B4..7 pads must be connected to each other according to the sсhematic.Example of captured video signal:BOM:IC Texas Instruments TFP410 PAP HTQFP64 Digital Transmitter == 1HDMI-19-02F, (L-KLS1-285-1-N-1-R) Connector 19pin (SMD) == 1Connector Hirose DF9-31S-1V(32) == 1Connector Hirose DF9-31P-1V(32) == 1RCLAMP0524P, TVS Array 5V  == 2FPC/FFC cable 60mm 20Pin 1mm Reverse Direction == 1FPC/FFC Socket 20Pin 1mm == 2LDO +3.3V LD1117DT33TR 0.8А [D-PAK] == 1Murata Chip Ferrite Bead BLM18RK601SN1D 0603 == 4SMD capacitor 0603 10uF == 3SMD capacitor 0603 100nF == 6SMD capacitor 0805 10uF == 2SMD resistor 0603 10k == 6SMD resistor 0603 510R == 1HDMI Extension Cable Male To Female With Screw Panel Mount 0,3(0,6)mhttps://aliexpress.com/item/1005001975924049.html== 1I installed a 30 cm long cable, but this length was barely enough. Most likely it is better to use 60 cm.It depends on the location of the board in the oscilloscope body. You may want to use a longer flat FPC/FFC cablesome info abouthttps://www.eevblog.com/forum/beginners/capturing-video-from-lcd-interface/msg5057389/#msg5057389.The approximate cost was 40$

author: EvgenyG
author_rank: Regular Contributor
timestamp: May 17, 2024, 03:17:56 am
content: Has the power supply replacement and CCFL->LED upgrade made any difference to the noise floor of the scope?

author: Miti
author_rank: Super Contributor
timestamp: May 23, 2024, 01:56:52 am
content: Can you please attach a pdf schematic? I don't have Altium.Thanks,MitiEdit: I imported it in Kicad.

author: Miti
author_rank: Super Contributor
timestamp: July 02, 2024, 03:59:49 pm
content: I assembled it and it works very well. Now I have to 3D print a bracket to install it beside the backlight inverter and one for the HDMI panel mount.Thanks JusTideaFIX!

author: JusTideaFIX
author_rank: Contributor
timestamp: July 05, 2024, 10:59:46 am
content: Quote from: EvgenyG on May 17, 2024, 03:17:56 amA cursory examination showed that these modifications had no effect on noise levels. It is not possible to conduct a detailed study - there is no corresponding laboratory available.Quote from: Miti on July 02, 2024, 03:59:49 pmI'm glad you were able to successfully repeat the project.If possible, post photos of how you placed the board.For myself, just in case, I made an additional 10cm ground wire for the scope chasis (see image).

author: snoboleg
author_rank: Newbie
timestamp: July 08, 2024, 10:30:52 pm
content: This is really impresive. Great work!I have a question, because I want so solve a similar issue.So I have this old automotive display driver board with a DS90CR216 (18bit) as a deserialzer from LVDS to parallel RGB and I would like to do the same thing.The diplay connector has a somewhat different pinout though. I have 5xB 6xG 5xR data pins.Do you think it would work if I adapt your design?How would I go about connecting the RGB data lines to the TFP410 though? I guess this has to do something with Figure 7-4 and 7-5 in the data sheet. But I am really a beginner and can't follow here.Maybe something like in the rgb_connections attachement?Would appreciate any help.

author: Miti
author_rank: Super Contributor
timestamp: July 11, 2024, 11:03:40 pm
content: Quote from: JusTideaFIX on July 05, 2024, 10:59:46 amI haven’t installed it yet, just tested it, as I’m waiting for a longer flat cable from AliExpress, but here it is.I made a braket that goes on the empty space beside the backlight inverter. I’ll post the stl file once I’m sure it is a good fit.Cheers,Miti

author: vinovino
author_rank: Contributor
timestamp: July 17, 2024, 07:36:08 am
content: Regarding power supply replacement using different model and brand,Do you encounter a problem like feeling a slight electricity when touching the BNC Terminals of the unit?

author: JusTideaFIX
author_rank: Contributor
timestamp: August 24, 2024, 04:01:58 pm
content: Quote from: vinovino on July 17, 2024, 07:36:08 amNo, I have not encountered such a problem. All devices in the workplace are connected to each other by a grounding contact through schuko sockets. This contact is not connected anywhere, since there is no PE conductor in the building.

author: Miti
author_rank: Super Contributor
timestamp: October 31, 2024, 07:22:20 pm
content: This is the final install.Edit: I uploaded the stl files.

author: button.ch
author_rank: Contributor
timestamp: May 16, 2025, 09:53:14 am
content: Meister, warum die VGA-Grafikkarte, die ich auf dem TDS3000-Oszilloskop mache, beim Start der Logo-Bildfarbenreinheit normal ist, sobald sie in die wellenförmige Anzeigeschnittstelle eintritt, ist der Bildhintergrund etwas lila. Ich habe noch keine Zeit, um zu vergleichen, welche Parameter sich zwischen dem Original TDS3GV und der Grafikkarte unterscheiden, die ich hergestellt habe, was bedeutet, dass ich das Gehäuse der Maschine demontieren muss.