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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

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Old 18th Nov 2017, 6:51 am   #41
dazzlevision
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Default Re: Philips PM5519 Service info

Here are the five pages of PM5519 service/user manuals supplement SGS27
Attached Files
File Type: pdf Philips PM5519 SGS27-page-1 1.pdf (724.6 KB, 13 views)
File Type: pdf Philips PM5519 SGS27-page-2.pdf (725.3 KB, 13 views)
File Type: pdf Philips PM5519 SGS27-page-3.pdf (826.3 KB, 12 views)
File Type: pdf Philips PM5519 SGS27-page-4.pdf (661.8 KB, 9 views)
File Type: pdf Philips PM5519 SGS27-page-5.pdf (645.1 KB, 12 views)
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Old 18th Nov 2017, 6:53 am   #42
dazzlevision
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Default Re: Philips PM5519 Service info

Here are pages 59 and 60 from my PM5519 service manual.

Concerning paragraph 5.2, I think the reference to solder bridge "I" is incorrect and should be "J". The table next to the Sound Oscillator (Unit 2) on the main circuit diagram (for Unit 10) and the circuit diagram for Unit 2, would seem to confirm this.

Last edited by dazzlevision; 18th Nov 2017 at 6:59 am. Reason: Added text.
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Old 18th Nov 2017, 11:39 am   #43
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Default Re: Philips PM5519 Service info

Thank you very much for those,

There's far more information than in the early copy of the manual that I have.
There were obviously a large number of revisions during the production of these units.

As we both deduced, the reference to solder link 'I' is erroneous.
Have now changed the links & got the sound carrier correct.

I'm going to temporarily stop investigating the noise on this unit for now. After comparing it with all the other pattern/colour bar generators that I have, its definitely the most noisy. The cleanest is the Telestest Pro, which is only a budget pocket size unit.

I guess that for the average domestic TV engineer at the time, it was mainly used instead of a test card, and would be viewed subjectively, on a domestic TV. It looks fine like that, its only when one uses it as a signal source for in-depth fault-finding or alignment of pro equipment, that it ts faults are apparent.

I certainly would not want to use it in any application where its output was to be digitised, as the noise would be there forever!

Thanks to all who provided circuits, help & encouragement, much appreciated.
I will get back to it later, once I have repaired some other test equipment that 's decided to go faulty.

I'm tempted to start a thread on test equipment that goes faulty, just at the moment one is using it to fix something else!
This seems to have been my misfortune for the last 6 months or so. I do a check of all the test gear & repair/calibrate it every two years or so, but the gremlins still get in.

Thanks all,

David.
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