Dansette Bermuda MK II ?? - Page 8 - UK Vintage Radio Repair and Restoration Discussion Forum

martinpinner · 1st Mar 2018, 6:59 pm

Thanks. I will let you know - probably tomorrow.

Station X · 1st Mar 2018, 7:07 pm

The suspense is killing me!

martinpinner · 2nd Mar 2018, 12:10 pm

Quote:

Originally Posted by ms660

Reconnect the resistor and disconnect one end of the capacitor that's connected between pin 9 and the 33k resistor and disconnect one end of the capacitor that's connected to the blue wire that goes to the tone control, then measure the voltages on pin 9, pin 3 and pin 2.

EDIT: Post crossed.

Lawrence.

I will reconnect the 100K resistor and disconnect capacitor C5 connected to Pin 9 but there is no 33K resistor in between as this goes to pin 3 which connects to the red wire that goes to the tone control. The sufflex cap was removed yesterday that goes to the blue wire that also goes to the tone control. Let you know when I have the readings.

ms660 · 2nd Mar 2018, 12:34 pm

Quote:

Originally Posted by martinpinner

Quote:

Originally Posted by ms660

Reconnect the resistor and disconnect one end of the capacitor that's connected between pin 9 and the 33k resistor and disconnect one end of the capacitor that's connected to the blue wire that goes to the tone control, then measure the voltages on pin 9, pin 3 and pin 2.

EDIT: Post crossed.

Lawrence.

I will reconnect the 100K resistor and disconnect capacitor C5 connected to Pin 9 but there is no 33K resistor in between as this goes to pin 3 which connects to the red wire that goes to the tone control. The sufflex cap was removed yesterday that goes to the blue wire that also goes to the tone control. Let you know when I have the readings.

There are two capacitors that are connected to pin 9, the other end of one of them is connected to the red wire and a 33k resistor, the other end of that 33k resistor is connected to pin 3.

The other end of the other capacitor connects to the blue wire that goes to the wiper of the tone control.

All the above can be seen from the photo's you have posted.

Lawrence.

Station X · 2nd Mar 2018, 12:34 pm

Where does the other end of what you're calling C5 go to?

EDIT. Crossed with Lawrence.

martinpinner · 2nd Mar 2018, 12:35 pm

Unfortunately my soldering iron has stopped working and will have to replace before continuing.

martinpinner · 2nd Mar 2018, 1:21 pm

Quote:

There are two capacitors that are connected to pin 9, the other end of one of them is connected to the red wire and a 33k resistor, the other end of that 33k resistor is connected to pin 3.

The other end of the other capacitor connects to the blue wire that goes to the wiper of the tone control.

Lawrence.

Finally I can see it. The other capacitor is the Sufflex connected to the blue wire - this was disconnected yesterday.

martinpinner · 2nd Mar 2018, 1:24 pm

Some advice please. Should I replace the soldering iron with a the gun held type that I currently have or go for the straight type for ease of use.
Thanks Martin

Station X · 2nd Mar 2018, 1:51 pm

It's a matter of personal preference. I prefer a conventional straight iron.

martinpinner · 2nd Mar 2018, 4:48 pm

Managed to get to the local country store and get a soldering iron.
I have disconnected both capacitors and reconnected the 100k resistor.
The voltage readings are:
Pin 2 19.40 Pin 3 18.80 and Pin 9 1.21

ms660 · 2nd Mar 2018, 5:12 pm

Without altering or reconnecting anything can you post a couple of new photo's, one showing the component side of the board and one showing the track side of the board?

Lawrence.

Station X · 2nd Mar 2018, 5:16 pm

Something still not right there.

Are you absolutely sure there's now nothing connected to pin 9 apart from the 100k resistor?

martinpinner · 2nd Mar 2018, 5:38 pm

The two capacitors and the 100K resistor are the only components connected to Pin 9.

Photo's attached as requested.

Station X · 2nd Mar 2018, 5:48 pm

It may be an illusion, but it looks like there's a wire bridging the tracks to pins 8 and 9?

The lead to a capacitor?

martinpinner · 2nd Mar 2018, 5:56 pm

That is probably where the 100K is connected and the end comes through the board. It not bridged but the tracks are close to each other due to solder. I will clean this up tomorrow to make sure there is more distance between them.

Station X · 2nd Mar 2018, 6:01 pm

Put a meter on ohms range (power off) across the two tracks. You'll soon see if they're bridging.

A bridge here would explain the low voltage on pin 9.

martinpinner · 2nd Mar 2018, 7:15 pm

no reading

Station X · 2nd Mar 2018, 7:40 pm

We've been here before. Does "no reading" mean short circuit or open circuit?

martinpinner · 2nd Mar 2018, 8:30 pm

There is continuity

Station X · 2nd Mar 2018, 8:31 pm

That's your problem then. Either the wire from R3 100k or a solder bridge.

1st Mar 2018, 6:59 pm	#141
martinpinner Hexode Join Date: Oct 2015 Location: Sheffield, South Yorkshire, UK. Posts: 252	Re: Dansette Bermuda MK II ?? Thanks. I will let you know - probably tomorrow.

1st Mar 2018, 7:07 pm	#142
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,286	Re: Dansette Bermuda MK II ?? The suspense is killing me! __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

2nd Mar 2018, 12:34 pm	#145
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,286	Re: Dansette Bermuda MK II ?? Where does the other end of what you're calling C5 go to? EDIT. Crossed with Lawrence. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

2nd Mar 2018, 12:35 pm	#146
martinpinner Hexode Join Date: Oct 2015 Location: Sheffield, South Yorkshire, UK. Posts: 252	Re: Dansette Bermuda MK II ?? Unfortunately my soldering iron has stopped working and will have to replace before continuing.

2nd Mar 2018, 1:24 pm	#148
martinpinner Hexode Join Date: Oct 2015 Location: Sheffield, South Yorkshire, UK. Posts: 252	Re: Dansette Bermuda MK II ?? Some advice please. Should I replace the soldering iron with a the gun held type that I currently have or go for the straight type for ease of use. Thanks Martin

2nd Mar 2018, 1:51 pm	#149
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,286	Re: Dansette Bermuda MK II ?? It's a matter of personal preference. I prefer a conventional straight iron. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

2nd Mar 2018, 4:48 pm	#150
martinpinner Hexode Join Date: Oct 2015 Location: Sheffield, South Yorkshire, UK. Posts: 252	Re: Dansette Bermuda MK II ?? Managed to get to the local country store and get a soldering iron. I have disconnected both capacitors and reconnected the 100k resistor. The voltage readings are: Pin 2 19.40 Pin 3 18.80 and Pin 9 1.21

2nd Mar 2018, 5:12 pm	#151
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Dansette Bermuda MK II ?? Without altering or reconnecting anything can you post a couple of new photo's, one showing the component side of the board and one showing the track side of the board? Lawrence.

2nd Mar 2018, 5:16 pm	#152
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,286	Re: Dansette Bermuda MK II ?? Something still not right there. Are you absolutely sure there's now nothing connected to pin 9 apart from the 100k resistor? __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

2nd Mar 2018, 5:38 pm	#153
martinpinner Hexode Join Date: Oct 2015 Location: Sheffield, South Yorkshire, UK. Posts: 252	Re: Dansette Bermuda MK II ?? The two capacitors and the 100K resistor are the only components connected to Pin 9. Photo's attached as requested. Attached Thumbnails

2nd Mar 2018, 5:48 pm	#154
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,286	Re: Dansette Bermuda MK II ?? It may be an illusion, but it looks like there's a wire bridging the tracks to pins 8 and 9? The lead to a capacitor? __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

2nd Mar 2018, 5:56 pm	#155
martinpinner Hexode Join Date: Oct 2015 Location: Sheffield, South Yorkshire, UK. Posts: 252	Re: Dansette Bermuda MK II ?? That is probably where the 100K is connected and the end comes through the board. It not bridged but the tracks are close to each other due to solder. I will clean this up tomorrow to make sure there is more distance between them.

2nd Mar 2018, 6:01 pm	#156
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,286	Re: Dansette Bermuda MK II ?? Put a meter on ohms range (power off) across the two tracks. You'll soon see if they're bridging. A bridge here would explain the low voltage on pin 9. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

2nd Mar 2018, 7:15 pm	#157
martinpinner Hexode Join Date: Oct 2015 Location: Sheffield, South Yorkshire, UK. Posts: 252	Re: Dansette Bermuda MK II ?? no reading

2nd Mar 2018, 7:40 pm	#158
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,286	Re: Dansette Bermuda MK II ?? We've been here before. Does "no reading" mean short circuit or open circuit? __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

2nd Mar 2018, 8:30 pm	#159
martinpinner Hexode Join Date: Oct 2015 Location: Sheffield, South Yorkshire, UK. Posts: 252	Re: Dansette Bermuda MK II ?? There is continuity

2nd Mar 2018, 8:31 pm	#160
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,286	Re: Dansette Bermuda MK II ?? That's your problem then. Either the wire from R3 100k or a solder bridge. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.