Home |
Search |
Today's Posts |
|
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 | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
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
Posted to sci.electronics.repair
|
|||
|
|||
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
Posted to sci.electronics.repair
|
|||
|
|||
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
Posted to sci.electronics.repair
|
|||
|
|||
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
Posted to sci.electronics.repair
|
|||
|
|||
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 |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
First Marshall use of PbF ? / Test for PbF | Electronics Repair | |||
Marshall AVT50 | Electronics Repair | |||
Marshall JCM 2000 | Electronics Repair | |||
Marshall AVT150 | Electronics Repair | |||
Marshall G80R CD | Electronics Repair |