Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Audio Equipment
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 06-25-2020, 02:35 AM   #1
Solo_Yamaha
New Member
 
Join Date: Jun 2020
City & State: Beirut
My Country: Lebanon
I'm a: Knowledge Seeker
Posts: 4
Default Yamaha RX-V373 automatic shutdown after 5 seconds

Hello,

I am new to this forum and this is my first post. I was googling and found this forum with experts in Yamaha repairing. i would be thankful if someone could help to fix my receiver. When starting the self diagnostic mode it shows a dc_prt 255H message and shuts down after 5 secods. By checking the service manual downloaded from i found that the voltage at the power amplifier DC voltage is high.

I have removed the cover to check for any burnouts or leakage bu didn't find any. I have all the tools to start checking and repairing but i need some guidance were to start.

Any help would be appreciated!!
Solo_Yamaha is offline   Reply With Quote
Old 06-25-2020, 09:04 AM   #2
tibimakai
Badcaps Veteran
 
Join Date: Jan 2012
City & State: Los Angeles/San Dimas, CA
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Knowledge Seeker
Posts: 3,446
Default Re: Yamaha RX-V373 automatic shutdown after 5 seconds

Usually, I just go to the final transistors and measure for short.
tibimakai is offline   Reply With Quote
Old 06-25-2020, 11:49 PM   #3
Solo_Yamaha
New Member
 
Join Date: Jun 2020
City & State: Beirut
My Country: Lebanon
I'm a: Knowledge Seeker
Posts: 4
Default Re: Yamaha RX-V373 automatic shutdown after 5 seconds

i couldn't find the final transistors i can only see the capacitors, resistors and relays at the outputs.
I got the service manual from manualslib.com/manual/1082963/Yamaha-Rx-V373.html
Solo_Yamaha is offline   Reply With Quote
Old 06-26-2020, 06:30 PM   #4
budm
Badcaps Veteran
 
budm's Avatar
 
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,117
Default Re: Yamaha RX-V373 automatic shutdown after 5 seconds

Please upload good clear pictures using 'Go Advanced' so we can see what we are dealing with.
__________________
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
budm is offline   Reply With Quote
Old 06-26-2020, 06:38 PM   #5
petehall347
Badcaps Veteran
 
Join Date: Jan 2015
City & State: worcester
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 2,680
Default Re: Yamaha RX-V373 automatic shutdown after 5 seconds

output devices are generally fastened to large heat-sinks
petehall347 is offline   Reply With Quote
Old 07-01-2020, 11:19 PM   #6
Solo_Yamaha
New Member
 
Join Date: Jun 2020
City & State: Beirut
My Country: Lebanon
I'm a: Knowledge Seeker
Posts: 4
Default Re: Yamaha RX-V373 automatic shutdown after 5 seconds

I am sorry for the late reply but i had very busy week. i have attached pictures of circuit boards with few diagrams from the service manual i found online that i think might help.
Attached Images
File Type: jpg 20200701_220654.jpg (648.7 KB, 13 views)
File Type: jpg 20200701_220711.jpg (742.6 KB, 11 views)
File Type: jpg 20200701_220720.jpg (433.4 KB, 11 views)
File Type: jpg 20200701_220740.jpg (465.4 KB, 11 views)
File Type: png Untitled.png (33.0 KB, 10 views)
File Type: png Untitled1.png (54.8 KB, 8 views)
File Type: png Untitled2.png (40.5 KB, 6 views)
Solo_Yamaha is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2021
Powered by vBulletin ®
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 04:38 AM.
Did you find this forum helpful?