Rigol DG1022U repair help（Perfectly repaired) - Page 1
Forum section: electronics / repair

author: lern01
author_rank: Regular Contributor
timestamp: November 25, 2024, 11:42:10 am
content: Rigol DG1022U does not turn on. After checking, it was found that the power board U1 was damaged, with silk screen 00E0 (or 004W). Since it does not affect the circuit operation, after dismantling, the power output is normal, but the screen is not bright. The mainboard works normally. Using an oscilloscope to detect, CH1 and CH2 both have waveform output, but the square wave waveform of CH1 has ripples. Inspection found that the screen boost IC (silk screen JDVEC) is damaged. It only affects the LED+ and LED- voltages that do not meet the requirements, but if the display circuit is normal, the screen should also display. Suffering from the lack of a circuit diagram, there is no progress at present. Please give me some advice, and if you know the parameters of the two ICs, please let me know. Thank you very much!

author: lern01
author_rank: Regular Contributor
timestamp: November 25, 2024, 11:46:08 am
content: This is U1 on a good power supply board, different silkscreen, but should be the same model IC.

author: lern01
author_rank: Regular Contributor
timestamp: December 02, 2024, 06:43:44 am
content: The chip with JDVCE printed on it is printed as JDVAK on some DG1022 motherboards. Please help me. Thanks in advance!

author: lern01
author_rank: Regular Contributor
timestamp: December 02, 2024, 10:28:05 am
content: I drew the circuit diagram of the boost part, and I hope experts can analyze the chip model.U1 is a digital potentiometer that controls the voltage boost of U2, that is, adjusts the brightness of the display.

author: lern01
author_rank: Regular Contributor
timestamp: December 02, 2024, 12:05:55 pm
content: I just borrowed a good 1022 from a friend. The waveforms output from pins 5 and 7 of U2 are as follows:（The U2 silkscreen here is JDVAK）

author: adam7
author_rank: Newbie
timestamp: December 02, 2024, 07:33:17 pm
content: Check this on PIC10F200T-I/OT:https://item.szlcsc.com/8716.html?fromZone=s_s__%2522PIC10F200T-I%2522

author: lern01
author_rank: Regular Contributor
timestamp: December 04, 2024, 02:49:45 pm
content: Quote from: adam7 on December 02, 2024, 07:33:17 pmThis is a tiny microcontroller.

author: lern01
author_rank: Regular Contributor
timestamp: December 08, 2024, 11:17:52 am
content: I have hand-drawn the schematic diagram of the power board and uploaded it for reference by those who need it. If there are any errors, please inform me in time. Once again, I would like to ask friends who know the models of these two chips to help me. Thank you very much!

author: lern01
author_rank: Regular Contributor
timestamp: December 10, 2024, 07:29:27 am
content: I’m happy that someone downloaded it and hope to get a reply.

author: adam7
author_rank: Newbie
timestamp: December 10, 2024, 10:10:56 pm
content: Check this one:

author: lern01
author_rank: Regular Contributor
timestamp: December 13, 2024, 10:07:41 am
content: Thank you very much^-^But the functions and pin arrangements are different. The boost IC on the DG1022 has two PWM outputs, which are boosted by capacitors and diodes.

author: lern01
author_rank: Regular Contributor
timestamp: December 28, 2024, 01:34:28 pm
content: It seems my DG1022 is dead and cannot be repaired.

author: lern01
author_rank: Regular Contributor
timestamp: January 05, 2025, 09:55:15 am
content: It’s unexpected that I can’t search for the specific model of these two small chips. How sad！！！

author: Swake
author_rank: Frequent Contributor
timestamp: January 05, 2025, 01:11:35 pm
content: I have a simple brain and try to structure all this information so I understand what is going on as there are several symptoms here.Quote from: lern01 on December 08, 2024, 11:17:52 amNice job, I'm certain this will help someone sooner or later.Herewith some findings:The chip on the left in the primary section is also marked as U1, you might want to rename it. If you know what it is please add to the schematic.You might want to rename Transistors T2 and T3 into Q1 and 2You might want to rename U7 to T1.not very important as of now: Any information about the coils (L3; L8 ->12)? Size, number of windings, markings, anything)Your Issues:Issue A/U1; known as 00E0 and as 004W; 6 pinsAfter removal the power supply works again. So I suspect it somehow pulls on the +5V in your schematic.I think it does influence the power supply via pin3 and U2. Or LED and T of U2 are reversed in the schematic and it receives a 'power good' info.What are the connectors J3 and J8 connected to?Issue B/Screen not bright. Screen boost IC damaged. known JDVEC and as JDVAK; 8 pinsIt might be AAT3190 from another post about the Rigol DM3051:https://www.eevblog.com/forum/repair/rigol-dm3051-burned-ic-please-hd74lv2g08aushelp-to-identify/See attached datasheet.QuoteYes, it makes sense to me, I mean the AAT3190 in this part of the schematic.Else these 2 companies on Alibaba reference JDVEC, you might want to contact them:-https://www.alibaba.com/product-detail/JE-17-JDVEC-JDM15-JD50K-JD3GB_1601227654975.html-https://www.alibaba.com/product-detail/Consult-and-negotiate-supply-Chip-and_1601263155383.htmlIssue C/Square waveform has ripples on CH1 output.Let's first focus on the above 2 issues.

author: keaigutou1
author_rank: Newbie
timestamp: January 25, 2025, 02:21:44 am
content: 是 AAT3190

author: lern01
author_rank: Regular Contributor
timestamp: July 20, 2025, 10:15:11 am
content: I have updated the power diagram. If there is anything wrong, please point it out. U1 is the power on and off chip. Pin6 controls the LED, which is always on when powered on and flashes when powered off. Pin1 is grounded through a button to control power on and off. If anyone knows the model of U1 chip, please let me know. Thank you very much!

author: lern01
author_rank: Regular Contributor
timestamp: July 28, 2025, 01:50:02 am
content: Does anyone know if there is a replacement IC chip for AAT3190? Because this chip is hard to buy. Thank you very much!

author: Swake
author_rank: Frequent Contributor
timestamp: July 28, 2025, 06:10:18 am
content: Stock is 0 everywhere I looked and it is on the discontinued list.Try asking Skyworks directly for some 'spares':https://www.skyworksinc.comYou could salvage one from another device. There are some evaluation boards out there. But that is going to be expensive of course.

author: Swake
author_rank: Frequent Contributor
timestamp: July 28, 2025, 06:17:45 am
content: The original manufacturer was Advanced Analog Technologyhttp://aat-ic.com/en-us/index.phpIt has been acquired by Skyworks

author: Swake
author_rank: Frequent Contributor
timestamp: July 28, 2025, 06:23:06 am
content: These guys have some in stock in hong kong according to their siteTSOP12 package:https://www.yic-electronics.kr/pdf/Skyworks-Solutions,Inc/AAT3190ITP-1-T1.htmlMSOP8 package:https://www.yic-electronics.kr/pdf/Skyworks-Solutions,Inc/AAT3190IKS-T1.html

author: lern01
author_rank: Regular Contributor
timestamp: August 21, 2025, 01:50:47 pm
content: First, thanks to my friend for helping me. This machine has been completely repaired. I've been a bit busy lately, watching a rocket launch and taking a road trip for about 20 days, so I forgot to post it. I replaced the AAT3190 with a MAX1748 and the power on/off controller chip, the PIC10F200, with an ATtiny10. It's been perfectly repaired. If anyone needs help, please contact me. Note: I have a problem with the output control pins of my EP2C5Q208C8N. The high level is normal, but the low level is still around 1.9V, so I added a comparator, the TLV3201AIDBVR.

author: lern01
author_rank: Regular Contributor
timestamp: August 21, 2025, 01:53:12 pm
content: Continued from above

author: lern01
author_rank: Regular Contributor
timestamp: August 21, 2025, 02:05:17 pm
content: This is the screen sleeping, everything is normal.