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after soldering the parts,the voltage cant adjuct, 12v ac transformer, vr2 set 4xx ohm, vr1 set 1k ohm, voltage output 7.89v, then check all parts are ok, except qn1, and qn2 parts list show "FJPF5200OTU", and it shows on the parts is "1a20aa", is it correct? and 3 led is on.   Edited by user Thursday, October 11, 2012 6:32:08 PM(UTC)
| Reason: Not specified chi0001 attached the following image(s):  placid_01.jpg (231kb) downloaded 18 time(s).You cannot view/download attachments. Try to login or register.
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Please double and triple check these parts: Brian Donegan attached the following image(s): placid_02.jpg (235kb) downloaded 68 time(s).You cannot view/download attachments. Try to login or register.
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triple checked ok except fjpf5200, it shows 1a20aa. 
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Well, that's the problem. Those are FJPF1943 (PNP) instead of FJPF5200. Either I sent you the wrong transistors, or you also have a PlacidBP and got them, mixed up somehow.
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only ordered 1 placid hd and 1 buffalo 3, and 1 9v transformer. Edited by user Sunday, October 14, 2012 5:01:43 PM(UTC)
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Please PM me with your information (I don't know who you are :-)).
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Since I build kits in batches, it appears several recent Placid orders contained the wrong transistors for QN1 and QN2.
I just sent out a notification email and replacement transistors to those who might have been affected.
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brain, received the parts yet and replaced, checked output voltage is 2.8xxV, adjust vr2 and keep 2.8xxV.
any suggest?
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ac_in 9.88v
vr1 400ohm
vr2 1kohm
tp_vin+ 12.07v
tp_ccs+ 12.08v
vref+ 3.86v
tp_gnd2 0v
tp_out+ 2.6x~2.7x v
tp_shunt+ 2.6x~2.7x v
after replaced j5200, cant adjust? brain or russ or anyone can help?
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first, sent me wrong parts and then no reply, anyone same as me?
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Originally Posted by: chi0001  first, sent me wrong parts and then no reply, anyone same as me? Not that this is any help, but I sent Brian an email 9 days ago & have received no response.
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One has to remember it's a hobby for TPA, plus their e-mail box is likely either filled with spam, or protected with a very tight spamfilter. In either case, this combination will not lead to a 100% succesrate in contacting them. Mailing Brian and/or Russ several times will in the end likely get you results.
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Are you able to increase the CCS current?
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Are the LEDs lighting at all? It seems as if the CCS is not doing anything, and the only way I can think that would happen is if its VREF is not producing any voltage. That could mean a dead CLD or LED or two.
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the pic you saw is no connect ac power, the led is light when power on.
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