Author Topic: E.S.I model 2150 Video bridge (LCR) help needed.  (Read 1561 times)

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Offline PaceguyTopic starter

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E.S.I model 2150 Video bridge (LCR) help needed.
« on: January 05, 2021, 05:17:26 am »
Does anyone here have any knowledge and experience with E.S.I 2150 / 2160 video bridges? I was given one that blows the main power fuse. I would suspect the power supply or CRT circuitry could be the culprit. To get at these involves a major teardown. Are these units known for any common failures that I should check first? Hopefully it's a common and easy to find part and not something specialized that's only available through E.S.I.
 

Offline picburner

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Re: E.S.I model 2150 Video bridge (LCR) help needed.
« Reply #1 on: January 05, 2021, 08:47:59 am »
Some time ago I posted all the ESI 2150/2160 service manual on the KO4BB website.
Due to the big size it is divided into chapters (1 file per chapter).
Chapter # 4 (Calibration and Maintenance) ended up in a different folder, I don't know why.
With the schematics it will be easier for you to find the fault.
« Last Edit: January 05, 2021, 08:54:01 am by picburner »
 

Offline PaceguyTopic starter

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Re: E.S.I model 2150 Video bridge (LCR) help needed.
« Reply #2 on: January 14, 2021, 12:52:58 pm »
A bit of an update: I opened it up, went to the power supplies. I found a shorted 1N5832 schottky stud type diode and horizonal output transistor, 2N6543 is also totally shorted. Luckily I have some NOS ECG 283 horizontal output transistors since many suppliers no longer stock horz. output transistors. I checked all the other components on both boards and couldn't find anything else. Popped in a new fuse and still a problem. Fuse opens but doesn't blow as bad ( black ). Any ideas?
« Last Edit: June 23, 2022, 01:51:30 pm by Paceguy »
 

Offline Testtech

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Re: E.S.I model 2150 Video bridge (LCR) help needed.
« Reply #3 on: April 19, 2023, 07:30:39 pm »
I know is is an ancient post, but, did you ever resolve this?
I have the same problem.
 

Offline PaceguyTopic starter

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Re: E.S.I model 2150 Video bridge (LCR) help needed.
« Reply #4 on: April 25, 2023, 05:19:40 pm »
I put the 2150 aside for some time and ordered some replacement parts last week and they arrived today. I plan to open it up and give it another try. I will post updates shortly.
 

Offline PaceguyTopic starter

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Re: E.S.I model 2150 Video bridge (LCR) help needed.
« Reply #5 on: April 25, 2023, 05:22:25 pm »
I know is is an ancient post, but, did you ever resolve this?
I have the same problem.
What is the exact problem with your 2150 ? If it blows the mains fuse, start by checking the power supply and high voltage section.
 


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