Pioneer VSX-D503S repaired 
Author Message
 Pioneer VSX-D503S repaired

This is for Archive purposes.  Neighbor gave me this AV Receiver with no
output.  I had repaired a VSX-453 for my son 3 years ago and had purchased
the manual.  The manual covers VSX-403, VSX-453 & VSX-463S.  The unit given
to me used the same 5 channel output amplifier as my sons so the  repair was
easier with a good manual.  The receiver  would power on but no audio, the
relay wouldn't click coming out of Standby.  I found the right front channel
had bad (shorted output transistors and many other parts. This repair took
me about 6 hours.

These are the bad parts:

Q4 = 2SA1302
Q3 = 2SC3281
Q512 = 2SC4793
Q514 = 2SA1837
Q508 = 2SC2705
Q506 = 2SA1145
R534 = .33 Ohm 5 Watt Dual Resistor
R575 & R576 = 2.2K 1/8 Watt
R612, R614, R616 & R618 = 4.7 Ohm 1/4 Watt Fusible
R526, R528, R530 & R532 = 100 Ohm 1/4 Watt Fusible
D522, D524 = 1N4752A  33 Volt Zener 1 Watt
D526 = 1SS252 Used a 1N4148
D548 = MTZJ20 Used a 20 Volt Zener



Mon, 01 Jan 2007 09:41:06 GMT
 Pioneer VSX-D503S repaired
No way it should have had all those parts bad. Somebody must have tin-foiled
the fuse, or used a 30 amp car fuse or the like.
Good job fixing it, though I have to question if it was worth the effort.

Mark Z.

--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.


Quote:
> This is for Archive purposes.  Neighbor gave me this AV Receiver with no
> output.  I had repaired a VSX-453 for my son 3 years ago and had purchased
> the manual.  The manual covers VSX-403, VSX-453 & VSX-463S.  The unit
given
> to me used the same 5 channel output amplifier as my sons so the  repair
was
> easier with a good manual.  The receiver  would power on but no audio, the
> relay wouldn't click coming out of Standby.  I found the right front
channel
> had bad (shorted output transistors and many other parts. This repair took
> me about 6 hours.

> These are the bad parts:

> Q4 = 2SA1302
> Q3 = 2SC3281
> Q512 = 2SC4793
> Q514 = 2SA1837
> Q508 = 2SC2705
> Q506 = 2SA1145
> R534 = .33 Ohm 5 Watt Dual Resistor
> R575 & R576 = 2.2K 1/8 Watt
> R612, R614, R616 & R618 = 4.7 Ohm 1/4 Watt Fusible
> R526, R528, R530 & R532 = 100 Ohm 1/4 Watt Fusible
> D522, D524 = 1N4752A  33 Volt Zener 1 Watt
> D526 = 1SS252 Used a 1N4148
> D548 = MTZJ20 Used a 20 Volt Zener



Mon, 01 Jan 2007 17:27:29 GMT
 Pioneer VSX-D503S repaired
A couple of the transistors were questionable and cheap, so it was worth the
few extra dollars to change them.  The resistors were all open, some burnt.
The guy that owned it was a "hacker". I thought he outgrown it (he is in his
early
20's), but he probably "opened" it and because of his interest in
electronics, dropped something inside accidently !!. It's just another
"goodie" for one of my family members.  Funny how i'll put in the time
fixing an audio / video piece but won't touch a computer.



Quote:
> No way it should have had all those parts bad. Somebody must have
tin-foiled
> the fuse, or used a 30 amp car fuse or the like.
> Good job fixing it, though I have to question if it was worth the effort.

> Mark Z.

> --
> Please reply only to Group. I regret this is necessary. Viruses and spam
> have rendered my regular e-mail address useless.



> > This is for Archive purposes.  Neighbor gave me this AV Receiver with no
> > output.  I had repaired a VSX-453 for my son 3 years ago and had
purchased
> > the manual.  The manual covers VSX-403, VSX-453 & VSX-463S.  The unit
> given
> > to me used the same 5 channel output amplifier as my sons so the  repair
> was
> > easier with a good manual.  The receiver  would power on but no audio,
the
> > relay wouldn't click coming out of Standby.  I found the right front
> channel
> > had bad (shorted output transistors and many other parts. This repair
took
> > me about 6 hours.

> > These are the bad parts:

> > Q4 = 2SA1302
> > Q3 = 2SC3281
> > Q512 = 2SC4793
> > Q514 = 2SA1837
> > Q508 = 2SC2705
> > Q506 = 2SA1145
> > R534 = .33 Ohm 5 Watt Dual Resistor
> > R575 & R576 = 2.2K 1/8 Watt
> > R612, R614, R616 & R618 = 4.7 Ohm 1/4 Watt Fusible
> > R526, R528, R530 & R532 = 100 Ohm 1/4 Watt Fusible
> > D522, D524 = 1N4752A  33 Volt Zener 1 Watt
> > D526 = 1SS252 Used a 1N4148
> > D548 = MTZJ20 Used a 20 Volt Zener



Tue, 02 Jan 2007 10:22:38 GMT
 Pioneer VSX-D503S repaired
i have my front right channel going bad.....it distorts and barely gets any
signal.....but then last night it worked fine........now today it won't
work......i know it is the front right because i hooked my left speaker to
it and it isn't the speaker it is the output........is there anyway you
could take a picture or something to show me some of the things to look
out....i have it here sitting open so knowing the more important things to
look at and kind of where they are would help greatly. thanks
-Nate


Sun, 22 Jul 2007 00:25:31 GMT
 Pioneer VSX-D503S repaired
The first thing I would look for in this situation is bad solder
connections, at the speaker terminals, and maybe at the output IC and
protection relay. Also the relay could be cutting out, though this is less
common on receivers of this type.
Most Pioneer models of recent (the last 15 years or so) have little to no
direct access to the main board - even just to look at it will require a
major disassembly.

Mark Z.


Quote:
>i have my front right channel going bad.....it distorts and barely gets any
> signal.....but then last night it worked fine........now today it won't
> work......i know it is the front right because i hooked my left speaker to
> it and it isn't the speaker it is the output........is there anyway you
> could take a picture or something to show me some of the things to look
> out....i have it here sitting open so knowing the more important things to
> look at and kind of where they are would help greatly. thanks
> -Nate



Sun, 22 Jul 2007 19:00:16 GMT
 
 [ 5 post ] 

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