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1 Jan 2020 18:06:15 UTC
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#4 - TCXO frequency reference teardown
Teardown of a Monitor 10MHz 1ppm TCXO oscillator, which failed. Unfortunately I couldn't find any information on the WF10192 chip, which I foolishly called an op-amp in the video. Seems like some kind of a frequency divider.
Previous video: http://youtu.be/OGGz1Yt3HEM
Seller's eBay store: http://stores.ebay.com/BootsParts-Electronic-Components
Specs: http://linearparts.com/images/7400B2A1-10MHZ-TCXO-3Y.JPG
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https://www.youtube.com/watch?v=kwDsffvTrLk
Previous video: http://youtu.be/OGGz1Yt3HEM
Seller's eBay store: http://stores.ebay.com/BootsParts-Electronic-Components
Specs: http://linearparts.com/images/7400B2A1-10MHZ-TCXO-3Y.JPG
...
https://www.youtube.com/watch?v=kwDsffvTrLk
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#119
119-memory-module-for-fluke-199c-(19xbc)
A memory module for Fluke 199C (or 199B, or 196B, or 196C, or 192B) was reproduced.
Forum: https://www.eevblog.com/forum/repair/fluke-199c-scopemeter-repair/
Fluke 199C repair: https://youtu.be/6TryOv2d5qw
Followup: https://youtu.be/ug27Y1bNSw8
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https://www.youtube.com/watch?v=C1NHDiM2-n0
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Created
4 months ago
Content Type
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video/mp4
Controlling
VIDEO
#103
103-rotel-rsx-1056-repair
This receiver did not stay powered on, but clicked and went off and on repeatedly. The problem seemed to be with some sort of a glue, which was supposed to hold large capacitors in place, but it turned brittle and corrosive. So a diode was damaged and a PCB trace was eaten away by this corrosion. After replacing the diode, restoring the trace, and replacing a capacitor (not a bad one, but just in case), the receiver came back to life.
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https://www.youtube.com/watch?v=66uOFia9TSY
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Created
4 months ago
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video/mp4
English
Controlling
VIDEO
#115
115-yamaha-p-155-digital-piano-repair
This piano did not power up. The problem was traced to a broken off soldering joint on the power connector. After fixing this problem the piano worked perfectly fine.
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https://www.youtube.com/watch?v=FRuW3TsuDRI
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Created
4 months ago
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video/mp4
English
Controlling
VIDEO
#136
136-kawai-cn27-digital-piano-repair
The piano had non-working B4 key. The keyboard was taken apart and fixed. The problem was found to be with a rubber contact pad that got stuck in a strange twisted position somehow.
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https://www.youtube.com/watch?v=_Tpe7UYVOqc
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Created
4 months ago
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video/mp4
English
Controlling
VIDEO
#66 -
66-fluke-99-li-ion-charging-mod
This is a followup to the Fluke 97 Li-ion Battery Upgrade video. A very cheap Fluke 99 was picked up on eBay with some problems. A Lipo pack was built for it. This time the charging voltage was adjusted from 8V to 8.4V, and also the charging current was doubled.
Fluke 97 Li-ion battery upgrade: https://youtu.be/pM8xTWhUnNk
Forum: https://www.eevblog.com/forum/testgear/using-li-ion-battery-in-fluke-97-scopemeter/
...
https://www.youtube.com/watch?v=LdS9Dot2Ywk
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Created
4 months ago
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video/mp4
Controlling
VIDEO
#109
109-agilent-6611c-power-supply-repair
This power supply did not regulate properly, showed extra commas on the display and started to smell after enabling the output for a while. A burnt tantalum capacitor was found on the front panel board and also some mysterious shorts on two boards: unidentified one on the power board, and one sort between two pins under a display driver chip.
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https://www.youtube.com/watch?v=385Vt0iOwXA
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4 months ago
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video/mp4
English
Controlling
VIDEO
#92 -
92-datron-1071-led-display-followup
A sheet of paper was added between the spacer and the overlay film, a few more things were tried as well. It seems that a thicker spacer should help, but I don't have the means to make one at the moment.
Previous video: https://youtu.be/Hcl0KuBE0Ts
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https://www.youtube.com/watch?v=weqgmmNwD9I
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4 months ago
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video/mp4
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#17 -
17-hewlett-packard-33120a-function
Step two in repairing this function generator. It turned out that another problem was missed somehow. Apparently a 2N5583 transistor in the final stage of the output amplifier has failed as well. I am quite surprised that the problem didn't manifest itself during the testing in the previous video.
Previous video: http://youtu.be/6Ww3seKMtsY
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https://www.youtube.com/watch?v=GER99inaOXU
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4 months ago
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video/mp4
Controlling
VIDEO
#137
137-agilent-e3642a-power-supply-repair
The unit powered up but had nothing on the display. It turned out that the VFD was shattered. A replacement was fitted. Basic load testing was performed.
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https://www.youtube.com/watch?v=Sj8PMUaCsKg
Transaction
Created
4 months ago
Content Type
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video/mp4
English