[TechAssist] Re: Sanyo AVM-2595U - bad regulation.
- From: "Don Hartigan" <hartstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 28 Nov 2001 22:38:44 -0400
NO,no Patrick,your 150vdc is ok.Your regualted 130vdc is not.The reasons
your power resistors are cracked is they are drawing excessive current.The
105vdc is your key to this.You have a ''short'' or very leaky component in
your cct.Lift the collector of your HOT &recheck your regulated voltage on
pin 4;should be 130vdc.You may have a bad fly.The D1880 is a good sub for
the 1879.Lift the B+ lines to your vert i/c,tuner,remove yoke plug &try to
find your short...good-luck.&hth...Don of HARTS-TVCR''ASC''
----- Original Message -----
From: "Patrick Fugere" <p_fugere@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, November 28, 2001 9:40 PM
Subject: [TechAssist] Re: Sanyo AVM-2595U - bad regulation.
>
> 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!
> 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
Other related posts:
