Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 5,247
Default Marshall AVT275

The front controls board is held to the chassis with standoffs held by push
fit ends into holes in the pcb. Then bush nut free pcb mounted pots and push
on knobs. Has anyone experienced the board dropping away inside. If the
limpet knobs work loose and then a bit of heavy handidness or knocking, the
pcb board will pop off.




  #2   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 818
Default Marshall AVT275


"N_Cook" wrote in message
...
The front controls board is held to the chassis with standoffs held by
push
fit ends into holes in the pcb. Then bush nut free pcb mounted pots and
push
on knobs. Has anyone experienced the board dropping away inside. If the
limpet knobs work loose and then a bit of heavy handidness or knocking,
the
pcb board will pop off.





Nope, never. I should imagine the standoffs are good at their job.

The knobs normally prevent this and clouting a knobless pot smashes the pot.


Gareth.


  #3   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 5,247
Default Marshall AVT275

Gareth Magennis wrote in message
...

"N_Cook" wrote in message
...
The front controls board is held to the chassis with standoffs held by
push
fit ends into holes in the pcb. Then bush nut free pcb mounted pots and
push
on knobs. Has anyone experienced the board dropping away inside. If the
limpet knobs work loose and then a bit of heavy handidness or knocking,
the
pcb board will pop off.





Nope, never. I should imagine the standoffs are good at their job.

The knobs normally prevent this and clouting a knobless pot smashes the

pot.


Gareth.




Clouting knobless pots on this would guarantee the board dropping away
inside.
All that holds the board ,then, is 8 quartered pips into the 8 pcb holes ,
easy finger force to release .
Does make it a doddle to remove the pcb for repair, none of those awkwardly
placed triangular catch pieces or screws etc


  #4   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 818
Default Marshall AVT275



"N_Cook" wrote in message
...
Gareth Magennis wrote in message
...

"N_Cook" wrote in message
...
The front controls board is held to the chassis with standoffs held by
push
fit ends into holes in the pcb. Then bush nut free pcb mounted pots and
push
on knobs. Has anyone experienced the board dropping away inside. If the
limpet knobs work loose and then a bit of heavy handidness or knocking,
the
pcb board will pop off.





Nope, never. I should imagine the standoffs are good at their job.

The knobs normally prevent this and clouting a knobless pot smashes the

pot.


Gareth.




Clouting knobless pots on this would guarantee the board dropping away
inside.
All that holds the board ,then, is 8 quartered pips into the 8 pcb holes
,
easy finger force to release .
Does make it a doddle to remove the pcb for repair, none of those
awkwardly
placed triangular catch pieces or screws etc





I tend to come to conclusions through evidence.

I have seen no evidence so far of what you are proposing actually happening.


Gareth.



  #5   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 5,247
Default Marshall AVT275

Gareth Magennis wrote in message
...


"N_Cook" wrote in message
...
Gareth Magennis wrote in message
...

"N_Cook" wrote in message
...
The front controls board is held to the chassis with standoffs held

by
push
fit ends into holes in the pcb. Then bush nut free pcb mounted pots

and
push
on knobs. Has anyone experienced the board dropping away inside. If

the
limpet knobs work loose and then a bit of heavy handidness or

knocking,
the
pcb board will pop off.





Nope, never. I should imagine the standoffs are good at their job.

The knobs normally prevent this and clouting a knobless pot smashes the

pot.


Gareth.




Clouting knobless pots on this would guarantee the board dropping away
inside.
All that holds the board ,then, is 8 quartered pips into the 8 pcb

holes
,
easy finger force to release .
Does make it a doddle to remove the pcb for repair, none of those
awkwardly
placed triangular catch pieces or screws etc





I tend to come to conclusions through evidence.

I have seen no evidence so far of what you are proposing actually

happening.


Gareth.




Nothing amiss here either , this pcb not having been dislodged even
partially. I've never seen this approach used anywhere else. I could not
decide whether it was a neat idea or an accident waiting to happen. Just
measured one of these "anchors" , about 5 pounds to dislodge one stand off ,
so x8 for the whole 15 x 3 inch board, once the knobs were loosened/shifting
along the spindles.


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
First Marshall use of PbF ? / Test for PbF N_Cook Electronics Repair 3 March 25th 10 04:31 PM
Marshall AVT50 N_Cook Electronics Repair 1 December 15th 08 09:29 PM
Marshall JCM 2000 N_Cook Electronics Repair 8 November 20th 08 11:13 AM
Marshall AVT150 Raged Electronics Repair 1 November 2nd 06 07:25 PM
Marshall G80R CD redamp75 Electronics Repair 1 February 3rd 05 04:11 AM


All times are GMT +1. The time now is 11:19 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"