Yamaha RX-V483 PS2 fault  - Page 1
Forum section: electronics / repair

author: nsbenz
author_rank: Newbie
timestamp: November 19, 2018, 03:09:12 pm
content: I have a receiver that went into protection mode. When I start the receiver in diagnostic mode I see the error PS2 PRT: 0089 show on the display. I can not find any service manuals on this. Any idea what to check?Thanks,Neil

author: PKTKS
author_rank: Super Contributor
timestamp: November 19, 2018, 03:24:05 pm
content: Very cryptic - you do need the proper manual or close that to decipherIn general terms PRV PRD are POWER error codesall other codes will tell you where the fault is.Like this other one..and THEY ALL DIFFER so you need some proper error tablebad consistency from Yamaha on this issuePaul

author: nsbenz
author_rank: Newbie
timestamp: November 19, 2018, 03:27:35 pm
content: That's the problem I am having I can not find any service manuals on this unit.Thanks.

author: mzacharias
author_rank: Frequent Contributor
timestamp: November 20, 2018, 01:24:01 pm
content: Hi-Fi Engine has the manual. You have to register but it's free.https://www.hifiengine.com/

author: nsbenz
author_rank: Newbie
timestamp: November 20, 2018, 08:00:40 pm
content: Looked at the service manual, any ideas where to start?Thanks,Neil

author: PKTKS
author_rank: Super Contributor
timestamp: November 21, 2018, 12:38:57 pm
content: we need the manual too dude.

author: ElecSeb
author_rank: Regular Contributor
timestamp: November 21, 2018, 01:08:50 pm
content: Your code means:PS2 PRT: 089 (I suspect you typed 1 zero to much)PS2 = When the protection function worked due to abnormal voltage in the power supply section. [PS1, PS2, PS3] -> your case PS2!!PRT = Protect!!0089 = A/D conversion value of voltage at the moment when the protection function worked (Reference voltage: 3.3 V=255)Please share your manual, I checked mine and copied the above!Additional:Cause:The voltage in the power supply section isabnormal.Supplementary information:The protection functionworked due to a defect or overload in the power supply.Turning on the power without correcting the abnormalitywill cause the protection function to work in 1 secondsand the power supply will be shut off.I just copied all this from the manual of your receiver (5min work) -> now we need your photo's and schematics what you checked and what is found.PS1/PS2/PS3Power supply voltage (PS) protection detection.The voltage at 96 pin (PS1_PRT)/97 pin (PS2_PRT)/98 pin (PS3_PRT) of IC22 are displayed.Voltage detectsPS1:AC_BL, AC_12, ±7A, +3.3SPS2:±12A, +5A, +5VID, +3.3T, +41FPS3:+5.5VNormal valuePS1:29 to 118PS2:135 to 191PS3:132 to 168(Reference voltage: 3.3 V=255)* If PS1, PS2 or PS3 becomes out of thenormal value range, the protection functionworks to turn off the power.

author: mzacharias
author_rank: Frequent Contributor
timestamp: November 21, 2018, 01:59:21 pm
content: Check every power supply line you can find. +12, +5, -5, whatever. My guess you'll find one voltage low or missing.

author: ElecSeb
author_rank: Regular Contributor
timestamp: November 21, 2018, 02:27:03 pm
content: My 2 cents check (probably they are broken -> they measure nothing and should measure):R5225 - 12K (in -12V line)R5224 - 12K (in +12V line)R5223 - 1.2K (in GND/common if I switfly looked)If this is OK, then measure the output here:IC523 = 12VIC524 = -12V

author: nsbenz
author_rank: Newbie
timestamp: November 21, 2018, 06:33:13 pm
content: Here is the manual, I will try and test the voltage.https://drive.google.com/file/d/1gHSoUo6viJfiLVlNTF1FAIbUTT7tmW4c/view?usp=sharingThanks

author: PKTKS
author_rank: Super Contributor
timestamp: November 22, 2018, 12:24:56 pm
content: I've done a really fast guess based on the error code onlywhich sometimes may be triggered by other issues...I would start right there on the PS2 output sectionthis place would be a good start pointthanks for the manual.. it helpsPaul

author: mzacharias
author_rank: Frequent Contributor
timestamp: November 24, 2018, 01:39:37 pm
content: By the way, refer to the service manual regarding the Protection Cancel start-up option.Incredibly useful for troubleshooting.