A broken Sony receiver

nickia · 21st March 2004, 03:17 AM

my receiver is SonyHTC-800DP

when i turn it on it first says"Protect" then"Standby" After few minutes this system turns off automatically.

i don't know why. Is there anyway to fix this or how much will it cost to do that?
thank you!

mwh-eng · 21st March 2004, 05:10 AM

Make sure you don't have a bad/shorted speaker or shorted speaker cables. Disconnect all speakers and speaker cables and make sure there are no small strands of wire shorting the terminals. Turn on the Receiver and see if you still have the problem.

Sometimes a dog or cat will chew the speaker cables and make a short. When they chew into the AC power cord they usually make some sort of noise.

nickia · 21st March 2004, 05:19 PM

i disconnected all cables except the power cord. the problem is still there.
maybe something wrong with the fuse??

thanks

mwh-eng · 21st March 2004, 06:36 PM

Your Receiver may have some type of power management processor that detects an overload at the outputs or in the power supply circuits. If you have a DVM, set it for DC volts and connect it to one speaker output, and then turn power on. Record the reading. Repeat for the other channel.

ChocoHolic · 21st March 2004, 07:26 PM

I would estimate that you have to meter the DC output voltage
inside the amp, in front of the output relay.
If one output stage is defect and one amp gives DC output, then
the protection circuit will probably keep the speakers relay off (in order to protect the speakers) and you will find no signal at the terminals.

Besides the DC-output (should be closed to zero), you should also
check the DC rails.

Good luck
Markus

nickia · 22nd March 2004, 04:23 AM

thank you for all your replies. but i don't really know what those things are.

I want to know in this system SonyHTC-800DP how much are those speakers worth? I found out the retail price of HTC-800DP is $ 349.95 USD. how much is the DVD/Receiver worth?
IF the speakers are good enough i can consider to buy a new av receiver.

Thank you!

thomas997 · 23rd March 2004, 01:33 AM

I doubt the speakers are worth much, maybe 50-100.

It looks like the receiver/dvd player is the most expensive part.

Probably 100-200?

Honestly none of its really worth keeping. Use the receiver as parts or as a dvd player or something.

Or return it if its still under warranty.

nickia · 23rd March 2004, 02:53 AM

one more thing is i can't believe this receiver doesn't have a optical input, so it's no reason to keep this unit because i want to plug it to my xbox.

Any good suggestion for a cheap 5.1 system with optical input? I'm not a audio expert all i want it's some 5.1 effect.

thanks

21st March 2004, 03:17 AM	#1
nickia diyAudio Member Join Date: Mar 2004 Location: canada	A broken Sony receiver my receiver is SonyHTC-800DP when i turn it on it first says"Protect" then"Standby" After few minutes this system turns off automatically. i don't know why. Is there anyway to fix this or how much will it cost to do that? thank you!

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21st March 2004, 05:10 AM	#2
mwh-eng diyAudio Member Join Date: Feb 2004 Location: Livingston, Montana	Make sure you don't have a bad/shorted speaker or shorted speaker cables. Disconnect all speakers and speaker cables and make sure there are no small strands of wire shorting the terminals. Turn on the Receiver and see if you still have the problem. Sometimes a dog or cat will chew the speaker cables and make a short. When they chew into the AC power cord they usually make some sort of noise.

21st March 2004, 05:19 PM	#3
nickia diyAudio Member Join Date: Mar 2004 Location: canada	i disconnected all cables except the power cord. the problem is still there. maybe something wrong with the fuse?? thanks

21st March 2004, 06:36 PM	#4
mwh-eng diyAudio Member Join Date: Feb 2004 Location: Livingston, Montana	Your Receiver may have some type of power management processor that detects an overload at the outputs or in the power supply circuits. If you have a DVM, set it for DC volts and connect it to one speaker output, and then turn power on. Record the reading. Repeat for the other channel.

21st March 2004, 07:26 PM	#5
ChocoHolic diyAudio Member Join Date: Dec 2003 Location: Munich	I would estimate that you have to meter the DC output voltage inside the amp, in front of the output relay. If one output stage is defect and one amp gives DC output, then the protection circuit will probably keep the speakers relay off (in order to protect the speakers) and you will find no signal at the terminals. Besides the DC-output (should be closed to zero), you should also check the DC rails. Good luck Markus

22nd March 2004, 04:23 AM	#6
nickia diyAudio Member Join Date: Mar 2004 Location: canada	thank you for all your replies. but i don't really know what those things are. I want to know in this system SonyHTC-800DP how much are those speakers worth? I found out the retail price of HTC-800DP is $ 349.95 USD. how much is the DVD/Receiver worth? IF the speakers are good enough i can consider to buy a new av receiver. Thank you!

23rd March 2004, 01:33 AM	#7
thomas997 diyAudio Member Join Date: Feb 2004 Location: Vancouver	I doubt the speakers are worth much, maybe 50-100. It looks like the receiver/dvd player is the most expensive part. Probably 100-200? Honestly none of its really worth keeping. Use the receiver as parts or as a dvd player or something. Or return it if its still under warranty.

23rd March 2004, 02:53 AM	#8
nickia diyAudio Member Join Date: Mar 2004 Location: canada	one more thing is i can't believe this receiver doesn't have a optical input, so it's no reason to keep this unit because i want to plug it to my xbox. Any good suggestion for a cheap 5.1 system with optical input? I'm not a audio expert all i want it's some 5.1 effect. thanks

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