Archive for the ‘Teardowns’ Category.

Beats Solo Bluetooth Headphone Teardown

I got this broken Beats Solo2 BT wireless headphone from one of my colleagues. In fact, it was broken once before around two years ago and I fixed it for him back then. The issue was because of a broken signal wire due to repeated flexing of the collapsible headphone band. This time around though, I am not going to fix it although I suspect that the cause remains the same. In fact, quite a few of my friends with the same Beats headphones had experienced similar problems. So I wanted to take it apart and take a closer look inside. A video of this teardown can be found towards the end of this post. Continue reading ‘Beats Solo Bluetooth Headphone Teardown’ »

Datum/Symmetricom 8040 Rubidium Frequency Standard Teardown

I finally got my hands on a Rubidium frequency standard. I have been wanting to get one of these for my lab for quite some time now but have not encountered a good one at a reasonable price. Most rubidium oscillator modules on the second hand market these days come from decommissioned equipment used in cell towers. A good used lab grade rubidium standard is even more expensive. Continue reading ‘Datum/Symmetricom 8040 Rubidium Frequency Standard Teardown’ »

Teardown and Repair of a Racal-Dana 1992 Frequency Counter

I picked up a non-working Racal-Dana 1992 Frequency Counter on eBay a few weeks ago. The symptom is that only channel C seems to work correctly and neither channel A or channel B produces any measurements. Since the majority of circuitry is shared among all three channels, it is most likely that the fault is localized within channel A and/or channel B. In this blog post I included many teardown pictures taken during the repair and a video detailing the process is included towards the end. Continue reading ‘Teardown and Repair of a Racal-Dana 1992 Frequency Counter’ »

Teardown of a Vivitar Rapid Battery Charger

I just picked up a charger along with a couple of NP-FW50 spare batteries for my new Sony Alpha A6000 mirrorless digital camera. The Sony branded charger is ridiculously expensive, so I opted for an aftermarket Vivitar branded one (VIV-QCB-104), which retails for under $10. The charger is rated at 8.4V with maximum charging current of 600mA. Spec-wise, it looks fine for the NP-FW50 1Ah 7.4V battery pack. Continue reading ‘Teardown of a Vivitar Rapid Battery Charger’ »

Bertan/Spellman 225-20R HV Power Supply Teardown

I just picked up another high voltage power supply, this time it is a working Bertan/Spellman 225-20R 20kV one. Unlike the Bertan 205A-05R that I did a teardown with last time which was entirely analog, this one can be controlled digitally either via the front panel or via GPIB from the back. In this blog post, let me share some of the teardown pictures with you. If you are interesting in seeing some cool experiments with this high voltage power supply, you can scroll down and watch my video towards the end. Continue reading ‘Bertan/Spellman 225-20R HV Power Supply Teardown’ »

Bertan/Spellman 205A-05R High Voltage Power Supply Teardown

I got a non-working Bertan 205A-05R 5kV high voltage power supply and did an attempted repair video a while ago (see video towards the end). But I forgot to post my teardown pictures somehow. So here we go, better late than never. Continue reading ‘Bertan/Spellman 205A-05R High Voltage Power Supply Teardown’ »

Epson PowerLite 84 Multimedia Projector Teardown and Repair

I recently was given a broken Epson PowerLite 84 projector. The projector would not turn on when plugged in and there was no sign of life. So I decided to take a look at what was wrong with it. The potential reward is high since I do not have a projector yet and I could definitely use one for my home theater setup. A video of this teardown and repair is linked towards the end. Continue reading ‘Epson PowerLite 84 Multimedia Projector Teardown and Repair’ »

Wavetek 395 Arbitrary Waveform Generator Teardown

I picked up a Wavetek 395 arbitrary waveform generator on eBay a few weeks ago. Wavetek 395 is a single channel, 12-bit resolution DDS AWG with a maximum clock frequency of 100 MHz. While the operation manual is readily available, I could not find the service manual anywhere. So I was curious to see the construction inside. In this post, I will show you some of the teardown pictures. If you want to see a video of the teardown along with some analysis, you scroll towards the end of this post. Continue reading ‘Wavetek 395 Arbitrary Waveform Generator Teardown’ »

Teardown of a SMART UF-55 Projector

My workplace was throwing away an old SMART UF-55 DLP projector. The projector had many stuck mirrors and the lamp had already surpassed the rated useful life span. I had always wanted to take a look at a DMD chip so I decided to take it home and do a detailed teardown. You can find my video of this teardown towards the end of the post. Continue reading ‘Teardown of a SMART UF-55 Projector’ »

Lambda LQ-521 Power Supply Teardown and Repair

I bought a non-working Lambda LQ-521 linear power supply on eBay a couple of weeks ago. Usually I avoid knowingly buying something that is broken unless I am certain that I could obtain parts for it at a reasonable price. But buying broken linear power supplies is another story as most of the problem can be fixed with readily available components. Continue reading ‘Lambda LQ-521 Power Supply Teardown and Repair’ »

Teardown of an 8-10 GHz RF Isolator

I did a teardown video of a microwave range (8-10 GHz) RF isolator last week. As a follow up, I will post some of the high-resolution pictures I took during the process here (click to see larger images). Continue reading ‘Teardown of an 8-10 GHz RF Isolator’ »

Some Pictures of My HP 8566B Spectrum Analyzer

The latest addition to my lab is an HP 8566B spectrum analyzer. This isn’t just any spectrum analyzer, it was perhaps the best spectrum analyzer money could buy back in the late 80’s. While it was discontinued in 1997 and has long become obsolete, its performance remains quite impressive even by today’s standards and still rivals that of many of its modern counterparts. Continue reading ‘Some Pictures of My HP 8566B Spectrum Analyzer’ »

EDC/Krohn-Hite MV216A DC Voltage Standard Teardown and Tempco Measurement

In this blog post, we are going to take a look at Electronic Development Corporation’s (EDC, acquired by Krohn-Hite in 1998) MV216A battery/external powered DC voltage standard and also measure its voltage reference’s temperature coefficient (tempco). A teardown video is also included towards the end. MV216A is a six decade precision DC voltage standard, it can output from 0.1µV in 100mV range all the way up to 11.1111V in 10V range. Voltage standards of this caliber are usually used as calibrators to calibrate multimeters and other test instruments. Continue reading ‘EDC/Krohn-Hite MV216A DC Voltage Standard Teardown and Tempco Measurement’ »

Keithley 706 Scanner Teardown

I bought this Keithley 706 scanner on eBay a while ago. This scanner can take up to ten different scanner cards and is typically used in an automated testing environment. In this blog post, I will show some of the teardown pictures and a couple of the scanner cards (7064, 7152) included in this unit. A quick teardown video is included towards the end. Continue reading ‘Keithley 706 Scanner Teardown’ »

Teardown of a Cisco CSS 11503 Content Services Switch

This old Cisco switch was on its way to the dumpster at my work place, so I thought I would rescue it. After all, while there are plenty of teardowns of consumer grade networking gear on the internet, teardowns of enterprise level network equipment have been hard to come by. So at the very least it would be a good opportunity to take a good peek inside. Continue reading ‘Teardown of a Cisco CSS 11503 Content Services Switch’ »