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 4. GQ Hot Air Soldering Rework Station
 Unit blows fuse when all switches are off ?		  New Topic  Reply to Topic
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Joseph

Canada
3 Posts
Posted - 03/13/2015 :  11:36:43  Show Profile  Reply with Quote
I got my rework station last June and now it blows fuses even when air flow and iron switches are off.

Just to pug in the cord is enough to blow the fuse. No display at all.

What should I check inside to diagnose the unit. Bought the unit at MCUmall GQ Electronics Store Canada

Can you help?. Thank you
Joseph
Reply #1

ZLM

1269 Posts
Posted - 03/13/2015 :  12:20:18  Show Profile  Reply with Quote
I believe you got two Thyristor BTA06 OR BTA08 burned. You need to replace those two Thyristors BTA06 or BTA08.

Those controls cooling down air. In this case, the switch off does not cut off its power.
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Reply #2

Joseph

Canada
3 Posts
Posted - 03/13/2015 :  13:09:02  Show Profile  Reply with Quote
I see 3 thyristors 2 BT136 and 1 BTA08. Is there a schematic for this Unit? That would help. Thanks. Does GQ have them in stock?

quote:
Originally posted by ZLM

I believe you got two Thyristor BTA06 OR BTA08 burned. You need to replace those two Thyristors BTA06 or BTA08.

Those controls cooling down air. In this case, the switch off does not cut off its power.
Joseph
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Reply #3

ZLM

1269 Posts
Posted - 03/14/2015 :  10:09:28  Show Profile  Reply with Quote
Those thyristors should be same. All can be BTA06 OR BTA08.

Use your multi-meter to check them. You can easily find out the problem. check T1, T2. another one is for iron.


If your station within one year factory warranty, then you can get free part for that. You may need to pay shipping only.
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Reply #4

Joseph

Canada
3 Posts
Posted - 03/27/2015 :  10:35:22  Show Profile  Reply with Quote
Update on my initial request. I was contacted by GQ support staff and they helped me with the diagnosis and provided me with schematic and replacement parts. Thanks to ZLM. You were right, one of the triac was shorted, BTA08, It was relatively easy to access the board and install the new triac. I also checked the handle and there was some plastic melting inside but the element was still working, 30 Ohm for 120 V. I cleaned up some of the melted plastic so the air flow would be good. Although I received parts to replaced the handle I kept it as is as it is working. I would have to destroy the handle to change the inner parts.
Thank you all for your help and assistance, especially the GQ support stall. Great job at helping me. Great unit to work with.

Joseph
Joseph
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