UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Offered and Wanted Messages > Sets, Parts and Service Information Wanted (private buyers only, no swaps)

Notices

Sets, Parts and Service Information Wanted (private buyers only, no swaps) If you need help obtaining components, sets or equipment, post a message here. Private buyers only - no traders. No swaps.

Reply
 
Thread Tools
Old 24th Mar 2020, 5:51 pm   #21
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 16,226
Default Re: Philips SBC850 Multimeter

I'm not suggesting you dismantle anything.

You could fit a battery and see whether the resistance ranges work. Just select each range in turn, touch the test leads together and see if you can zero the scale at the right end using the OHMS control.

Then how about measuring the voltage of a 1.5V and 9V battery?
__________________
Graham. Forum Moderator

Keep the soldering iron hot.
Station X is offline   Reply With Quote
Old 24th Mar 2020, 10:57 pm   #22
DMcMahon
Octode
 
DMcMahon's Avatar
 
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 1,174
Default Re: Philips SBC850 Multimeter

Quote:
Originally Posted by giacomo16v View Post
I think the color of resistance are all brown for 1,2,4,5 ......the middle is to much burned and dont know if that is one information for understand something......example.....in commerce the only one resistance that you can find is one resistance all brown if the 1,2,4,5 are brown....somebody have an idea
You must have very good eyesight if you can distinguish 4 brown bands on this burnt resistor !
DMcMahon is offline   Reply With Quote
Old 25th Mar 2020, 12:24 am   #23
DMcMahon
Octode
 
DMcMahon's Avatar
 
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 1,174
Default Re: Philips SBC850 Multimeter

I can now see from post # 6 where you think there are 4 brown bands, I am not so sure myself.

Some of the other resistors look like they have 6 bands and others 5 bands, so the burnt resistor could be a 5 or 6 banded resistor but the sixth band is a temperature coefficient value, so it does not matter in terms of the resistance value determination.

From your high resolution photo my old eyes are still struggling with some of the band colours on the various resistors, but from what I can determine they do not obviously appear to be similar values to the Philips UTS-001 circuit resistors.

If the burnt resistor does have 4 browns bands with a band in-between, then that would mean the resistor is 11X (first, second and third colour band digits) multiplied by 10 (4th brown band = the multiplier of 10) where X could be anything between 0 and 9.

In this example the most logical colour for the middle band would be black (0) this then would be 110 multiplied by 10 which is 1.1kohms which is a preferred (standard) resistor value. The 5th (outer/last) brown band being a +/- 1% tolerance band.

But resistors in DVMs may not be preferred values, i.e. they may be special values to suit the meter calibration.

Have you tried measuring the burnt resistor to see if any resistance value can be measured ?
Attached Thumbnails
Click image for larger version

Name:	6-Band_Resistor_Color_Code.jpg
Views:	12
Size:	39.2 KB
ID:	201575  
DMcMahon is offline   Reply With Quote
Old 25th Mar 2020, 10:44 am   #24
giacomo16v
Triode
 
Join Date: Mar 2020
Location: Rome, Italy.
Posts: 12
Default Re: Philips SBC850 Multimeter

I still have not tried to measure the burnt resistance because unfortunately I do not have a multimeter with a charged battery to be able to do it, however under the microscope the bands of the burnt resistance can be clearly seen that there are 5, and fortunately the 4 external to the central one can be seen well that the color is brown. Your deduction on the color of the central band gives me hope and I thank you for understanding my little electronic reasoning, and more practical. Now I will look for a way to create a 3 volt battery to power the other multimeter I have at home and measure the burnt resistance. thanks a lot DMcHamon
giacomo16v is offline   Reply With Quote
Old 25th Mar 2020, 3:09 pm   #25
Crowella
Diode
 
Join Date: Jan 2019
Location: Whitby, North Yorkshire, UK.
Posts: 4
Default Re: Philips SBC850 Multimeter

Hi, sorry for the late reply, the PCB will come out, I will send what info I can, but need to find the meter again first!
Crowella is offline   Reply With Quote
Old 7th Apr 2020, 6:11 pm   #26
giacomo16v
Triode
 
Join Date: Mar 2020
Location: Rome, Italy.
Posts: 12
Default Re: Philips SBC850 Multimeter

Hi Crowella! Sorry but only now i have see your answer. So thank you, i'm waiting for your good news!
giacomo16v is offline   Reply With Quote
Old 26th May 2020, 7:22 pm   #27
Gtman72
Diode
 
Join Date: May 2020
Location: Bologna, Italy
Posts: 1
Default Re: Philips SBC850 Multimeter

Greetings to all from Italy.
I think this discussion is the only one in the world that talks about the SBC850. And of course those who find it are those who have a broken SBC850. Unfortunately, I am no exception, the same broken resistance, soon I will post some photos.
It would be very important for me to repair this multimeter, because it has a great emotional value for me.
I hope that a solution can be found together.
Gtman72 is offline   Reply With Quote
Reply

Thread Tools



All times are GMT +1. The time now is 5:57 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Copyright ©2002 - 2020, Paul Stenning.