JCM 2000 pots repair inquiry:
Moderators: greatmutah, GuitarBilly
-
- Hall of Fame Member
- Posts: 457
- Joined: Mon Jan 21, 2013 9:43 am
JCM 2000 pots repair inquiry:
I lent my DSL 100 head out for a benefit concert last weekend for 8 bands. When I got there, I noticed the knob was missing on the green channel gain pot. Upon closer inspection, the threaded part of the shaft was cracked and it broke in my hand with the nut attached to the portion of the shaft also. Does anyone know if the pots are soldered directly to a board, and if it's a difficult repair for a diy'er?
Re: JCM 2000 pots repair inquiry:
Dunno if this gives you any clues, they seem to be PCB mounted..
http://www.newoldsounds.com/index.php?m ... 22_328_329
http://www.newoldsounds.com/index.php?m ... 22_328_329
Re: JCM 2000 pots repair inquiry:
Its been a while since I've poked about in a DSL/TSL but here is a picture of the guts of one. You can see that the pots are PCB mounted and that the control PCBs are on break out boards so removing them to replace the pot should be pretty straight forward so long as you know how to use an iron on PCBs without ruining the traces. Check that the filter caps are drained before delving in.

Loop wrote:I’m currently shopping for a 1996 Red Dodge Viper with yellow wheels. Who gives a shit about taste?!
Re: JCM 2000 pots repair inquiry:
Those are not very fun to replace.
- GuitarBilly
- Chief Executive Owl
- Posts: 48416
- Joined: Thu Jan 17, 2013 9:03 pm
- Location: Rockville, MD
- Contact:
Re: JCM 2000 pots repair inquiry:
yeah it's PCB mounted and the PCBs on the DSL are very thin. That's not a repair I would recommend for someone who's not very familiar with working with PCBs. Take it to a tech and charge it to whoever borrowed your amp.
Guitars:
'78 Les Paul Pro / '89 SG Special/ '04 Gibson Les Paul Classic 3 pickup / Jackson Star/ Endres Tele / Fernandes Rhoads/ ''74 Hohner MIJ strat/ 2 Partscasters
Amps:
Depends on when you ask. I got tired of constantly updating this section lol
Cabs
Marshall 1960A w V30s/ Seismic 2x12 w Redback and V30.
Questions about the forum: please PM here. Can't access the forum? Need a password reset? Please access our Facebook page https://www.facebook.com/GuitarGearForumOfficial and message me through it.
'78 Les Paul Pro / '89 SG Special/ '04 Gibson Les Paul Classic 3 pickup / Jackson Star/ Endres Tele / Fernandes Rhoads/ ''74 Hohner MIJ strat/ 2 Partscasters
Amps:
Depends on when you ask. I got tired of constantly updating this section lol
Cabs
Marshall 1960A w V30s/ Seismic 2x12 w Redback and V30.
Questions about the forum: please PM here. Can't access the forum? Need a password reset? Please access our Facebook page https://www.facebook.com/GuitarGearForumOfficial and message me through it.
- 100 watt
- Hall of Fame Member
- Posts: 5653
- Joined: Fri Jan 18, 2013 2:03 pm
- Location: In the goddamn woods
Re: JCM 2000 pots repair inquiry:
Word. those newer style PCBs are a mofo to work on
Murdoch wrote:Nothing I would do to her would be in the same country as hygenic. If it were, I would be actively devaluing the act, and we can't have that.
Good Deals With : Facing Failure (now Van_Muddlestein) . goodhonk . benjamin801. sublimeride. River Bend. Flying Milkman. Crunchtime. MickTaylorFan. ~Abstract~. colejustesen. paul88lx .guitarbilly74. Mike LX-R. Murdoch. Le_Marteau. matt rhoads.nwright.Mk2 Steve
Re: JCM 2000 pots repair inquiry:
You can snip the tangs on the pot to make it easier to remove, but there's a chance that you may lift or damage a pad either way. 

-
- Hall of Fame Member
- Posts: 457
- Joined: Mon Jan 21, 2013 9:43 am
Re: JCM 2000 pots repair inquiry:
Thanks for the responses. Sounds like a 100.00 job to me I'm going to assume.
- 100 watt
- Hall of Fame Member
- Posts: 5653
- Joined: Fri Jan 18, 2013 2:03 pm
- Location: In the goddamn woods
Re: JCM 2000 pots repair inquiry:
Hugh Jaynus wrote:You can snip the tangs on the pot to make it easier to remove, but there's a chance that you may lift or damage a pad either way.
Gotta be REALLY careful doing that, but it seems to be the best way.
I gotta do that on my little Marshall Bass 12 (same thing as a lead 12..just no dirt / od sounds) combo. The pots in it are all bad.
Murdoch wrote:Nothing I would do to her would be in the same country as hygenic. If it were, I would be actively devaluing the act, and we can't have that.
Good Deals With : Facing Failure (now Van_Muddlestein) . goodhonk . benjamin801. sublimeride. River Bend. Flying Milkman. Crunchtime. MickTaylorFan. ~Abstract~. colejustesen. paul88lx .guitarbilly74. Mike LX-R. Murdoch. Le_Marteau. matt rhoads.nwright.Mk2 Steve
-
- Hall of Fame Member
- Posts: 457
- Joined: Mon Jan 21, 2013 9:43 am
Re: JCM 2000 pots repair inquiry:
I'm decent with a soldering iron, but never toyed with a pcb. I'm assuming I just need to keep the heat at the joint, and not liquify the board from the heat?Zozobra wrote:Its been a while since I've poked about in a DSL/TSL but here is a picture of the guts of one. You can see that the pots are PCB mounted and that the control PCBs are on break out boards so removing them to replace the pot should be pretty straight forward so long as you know how to use an iron on PCBs without ruining the traces. Check that the filter caps are drained before delving in.