Orange AD200 - Can hear the hum but no power

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OU818
Orange Master
Posts: 2329
Joined: Fri Sep 11, 2009 7:55 am
Location: Melbourne, AUS

Orange AD200 - Can hear the hum but no power

Post by OU818 » Sun Aug 25, 2019 10:55 pm

I was playing a gig on the weekend and when I was setting my amp up I switched it on but no light came on. At first I thought it was the power cable so I swapped that out with another but still, no light.

So the sound guy and I decided to run it to a different power point but still nothing. In the end I switched the power point off and on again and then suddenly I had a working amp. It didn't miss a trick for the rest of the show.

Anyway... I was a bit suss about it so I plugged it in again the next morning. Nothing. I try different points in the house and different cables... nothing.

When I switch the power on I can hear the slight hum of the transformers getting power but no light comes on and, from what I can see, no tubes glow. It just seems dead.

I checked the mains fuse and the HT1/HT2 fuse and they look fine. I even swapped the mains fuse out with a new one. Still nothing.

So it is going into the shop next weekend but in the meantime I thought I'd see if anybody had experienced something like this before. I am dreading to think it is the PT that has died. It was recently serviced and re-tubed and worked fine the last 3 weeks. When I went to plug in at rehearsal the week before I thought I felt the IEC connector move more than it should but when I opened the amp up everything seemed fine (possibly something has broken there that I didn't notice...).

Anyway, I'm at a bit of a loss.
Orange Gear:
AD200B MkIII
Terror Bass MkII
OBC810

Non-Orange:
Barefaced Super Twin

Basses:
Sandberg Electra VS4
Polaris Manta V Custom

Les Paul Lover
Duke of Orange
Posts: 6752
Joined: Tue Aug 18, 2009 9:08 am
Location: Derby, England

Re: Orange AD200 - Can hear the hum but no power

Post by Les Paul Lover » Mon Aug 26, 2019 7:38 pm

It sounds very similar to the issue I had with 2 of my AD15. I haven't seen the schematic for the AD200, but for my AD15, the pilot light and valve heater circuit is the same, except for the GZ34 which has a different tap with slightly lower voltage.

In my case, on both my AD15, the 1st splicing connector directly after the transformer sort of burnt out and left carbon residue on the splicing contacts. So the valves heaters for the 2 ECC83 and 2 EL84 weren't getting any current, and no sound was coming out. In both cases, with the help of this forum for the 1st amp, I removed and clean all the splicers and hardwired the circuit with 2 amp/230v electrical wire. Soldered that to the splicers spokes and done.

I'll try to find a link to my 1st amp issue thread. People on this forum were great at helping me out diagnose the issue.
Last edited by Les Paul Lover on Tue Aug 27, 2019 7:32 am, edited 1 time in total.
Ant

Orange Gear: RV50 MKI, R30, AD15, AD5, PPC212
Past Orange: Orange AD30TC Combo, Tiny Terror

Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute

Les Paul Lover
Duke of Orange
Posts: 6752
Joined: Tue Aug 18, 2009 9:08 am
Location: Derby, England

Re: Orange AD200 - Can hear the hum but no power

Post by Les Paul Lover » Mon Aug 26, 2019 7:52 pm

Ant

Orange Gear: RV50 MKI, R30, AD15, AD5, PPC212
Past Orange: Orange AD30TC Combo, Tiny Terror

Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute

OU818
Orange Master
Posts: 2329
Joined: Fri Sep 11, 2009 7:55 am
Location: Melbourne, AUS

Re: Orange AD200 - Can hear the hum but no power

Post by OU818 » Mon Aug 26, 2019 10:39 pm

That does sound very similar. I had a look at the wiring in my amp last night and can confirm the heater and lamp are all on the same circuit.

I'll have a read of your original post. Thanks heaps!
Orange Gear:
AD200B MkIII
Terror Bass MkII
OBC810

Non-Orange:
Barefaced Super Twin

Basses:
Sandberg Electra VS4
Polaris Manta V Custom

OU818
Orange Master
Posts: 2329
Joined: Fri Sep 11, 2009 7:55 am
Location: Melbourne, AUS

Re: Orange AD200 - Can hear the hum but no power

Post by OU818 » Mon Sep 09, 2019 11:41 pm

Les Paul Lover wrote:
Mon Aug 26, 2019 7:52 pm
viewtopic.php?t=53675
This was the problem after all. $60 bench fee and I'm back in action. Thanks so much! :mrgreen:
Orange Gear:
AD200B MkIII
Terror Bass MkII
OBC810

Non-Orange:
Barefaced Super Twin

Basses:
Sandberg Electra VS4
Polaris Manta V Custom

Les Paul Lover
Duke of Orange
Posts: 6752
Joined: Tue Aug 18, 2009 9:08 am
Location: Derby, England

Re: Orange AD200 - Can hear the hum but no power

Post by Les Paul Lover » Tue Sep 10, 2019 6:12 am

OU818 wrote:
Mon Sep 09, 2019 11:41 pm
Les Paul Lover wrote:
Mon Aug 26, 2019 7:52 pm
viewtopic.php?t=53675
This was the problem after all. $60 bench fee and I'm back in action. Thanks so much! :mrgreen:
Glad it was just that!!!!
Those splicing connectors really are crap though, and a seriously weak construction point in terms of long term reliability.

I think Orange started using better connectors at some point.

What did your tech do? Removed them all and hardwired them?
I'm tempted to do that preventatively to my Rocker 30.....
Ant

Orange Gear: RV50 MKI, R30, AD15, AD5, PPC212
Past Orange: Orange AD30TC Combo, Tiny Terror

Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute

OU818
Orange Master
Posts: 2329
Joined: Fri Sep 11, 2009 7:55 am
Location: Melbourne, AUS

Re: Orange AD200 - Can hear the hum but no power

Post by OU818 » Wed Sep 11, 2019 3:52 am

Les Paul Lover wrote:
Tue Sep 10, 2019 6:12 am
OU818 wrote:
Mon Sep 09, 2019 11:41 pm
Les Paul Lover wrote:
Mon Aug 26, 2019 7:52 pm
viewtopic.php?t=53675
This was the problem after all. $60 bench fee and I'm back in action. Thanks so much! :mrgreen:
Glad it was just that!!!!
Those splicing connectors really are crap though, and a seriously weak construction point in terms of long term reliability.

I think Orange started using better connectors at some point.

What did your tech do? Removed them all and hardwired them?
I'm tempted to do that preventatively to my Rocker 30.....
He told me that the connector had failed and started to arc which desoldered it from the circuit. He removed them and hardwired the heater circuit. Technically it was a job I could have done however I love this amp and my life so tend not to mess with it (I restrict myself to 9v pedal circuits :D )


Yeah I would feel that if those connectors are in your amp it is worth getting them out.
Orange Gear:
AD200B MkIII
Terror Bass MkII
OBC810

Non-Orange:
Barefaced Super Twin

Basses:
Sandberg Electra VS4
Polaris Manta V Custom

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