There are two large 10-15watt resistors right before the STR. They mesure pretty much what they should 220ohms, but one has a crack the whole lenght and mesures 210 and the other 222. Before the resistors is my 150v and after it goes down to ~105v. I guess this must be my problem? ----- Original Message ----- From: "Jerry" <geiting@xxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Wednesday, November 28, 2001 7:52 PM Subject: [TechAssist] Re: Sanyo AVM-2595U - bad regulation. > > The input to the STR is way too low (your right, it should be about +150 > volts or so and has to be above about 135 for the STR to regulate). So the > problem apparently is in raw B+ supply. I don't have the diagram for that > set, but usually there is just the bridge diodes, fusible resistor and/or > fuse, main filter cap, etc. An open diode in the bridge could do this. If > the HOT is not running hot, then it's probably not the problem. There may > also be a resistor in the supply before the STR for current limiting that > has gone up in value. > Jerry > Christian's Electronics Service > > ----- Original Message ----- > From: "Patrick Fugere" <p_fugere@xxxxxxxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Wednesday, November 28, 2001 7:16 PM > Subject: [TechAssist] Re: Sanyo AVM-2595U - bad regulation. > > > | > | Voltage plays aroud 105v coming out of the STR. Same thing going in( isn't > | it suppose to be arround 150v?). B+ goes from 90v to 110v depending on the > | brightness of the image. The brighter the lower the voltage is. > | no irregular excess ripple noticed on scope. Mostly horizontal movement, > | especially pin. The HOT is not abnormally hot. tested it for 20min on. > | > | U suspect power supply components? HOT? > | > | ----- Original Message ----- > | From: "Jerry" <geiting@xxxxxxxxxx> > | To: <techassist@xxxxxxxxxxxxx> > | Sent: Wednesday, November 28, 2001 6:50 PM > | Subject: [TechAssist] Re: Sanyo AVM-2595U - bad regulation. > | > | > | > > | > How low is the regulated voltage? Is the raw B+ to the regulator OK? > | excess > | > ripple? If not check filter caps and power supply diodes. Is the pix > | > getting smaller vert and horz or just horz? Is HOT running hot? The > d1879 > | > and d1880 cross to different transistors so they may not be similar > enough > | > to sub correctly. > | > > | > Jerry > | > Christian's Electronics Service > | > > | > ----- Original Message ----- > | > From: "Patrick Fugere" <p_fugere@xxxxxxxxxxxx> > | > To: <techassist@xxxxxxxxxxxxx> > | > Sent: Wednesday, November 28, 2001 6:24 PM > | > Subject: [TechAssist] Sanyo AVM-2595U - bad regulation. > | > > | > > | > | > | > | Hi, > | > | > | > | Sanyo AVM-2595U with bad regulation. > | > | Received the set dead. HOT was short so I replaced it. Now it goes on > | but > | > | very bad regulation. The brighter the screen gets the smaller and more > | > | distorted the image is.(squeezed pin). > | > | I replaced IC001 ( STR30130 ) and still the same . So I replaced the > | > nearby > | > | cap C007 and no dice. > | > | > | > | What else could be causing this. The original HOT is D1879 but I > | > replaced > | > | it with one I had in stock which has similar specs D1880. Could this > be > | > it? > | > | I would doubt it but... > | > | > | > | Any help appreciated. > | > | > | > | Patrick Fugere > | > | F u j i s t i c s > | > | Montreal, Canada. > | > | p_fugere@xxxxxxxxxxxx > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | ================================= > | > | Help make your TechAssist database better! > | > | Submit your fixes here: http://circuitwork.com/techassist/tip/#tips > | > | ================================= > | > | To UNSUBSCRIBE your email address, click here: > | > | mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe > | > | > | > > | > > | > ================================= > | > Help make your TechAssist database better! > | > Submit your fixes here: http://circuitwork.com/techassist/tip/#tips > | > ================================= > | > To UNSUBSCRIBE your email address, click here: > | > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe > | > > | > | ================================= > | Help make your TechAssist database better! > | Submit your fixes here: http://circuitwork.com/techassist/tip/#tips > | ================================= > | To UNSUBSCRIBE your email address, click here: > | mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe > | > | > > > ================================= > Help make your TechAssist database better! > Submit your fixes here: http://circuitwork.com/techassist/tip/#tips > ================================= > To UNSUBSCRIBE your email address, click here: > mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe > ================================= Help make your TechAssist database better! 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