Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Mystery Regulator
Hello Group!
My Pioneer surround reciever went dead recently and it appears to be a failure of a regulator in the standby supply. It is marked 78M56A and identified on the pcb as NJM78M56. it's a TO-220 (mfr is JRC). I have been unable to locate any data on the web. I expect I could sub it with something if I knew what voltage it is meant to o/p. (maybe its variable). Can anyone help? Thanks! --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.775 / Virus Database: 522 - Release Date: 08/10/2004 |
#2
|
|||
|
|||
Pioneer should have it under that part number. Just to be sure, have the IC
locator number from the board (like IC 206 or similar) and order from Pioneer at 800-457-2881 It's a fairly standard 5.6 volt regulator. One could just add a diode in the ground leg of a 7805 regulator and do the same thing. Mark Z. "Kevin, VE1TV" wrote in message ... Hello Group! My Pioneer surround reciever went dead recently and it appears to be a failure of a regulator in the standby supply. It is marked 78M56A and identified on the pcb as NJM78M56. it's a TO-220 (mfr is JRC). I have been unable to locate any data on the web. I expect I could sub it with something if I knew what voltage it is meant to o/p. (maybe its variable). Can anyone help? Thanks! --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.775 / Virus Database: 522 - Release Date: 08/10/2004 |
#3
|
|||
|
|||
Thanks Mark!
"Mark D. Zacharias" wrote in message ... Pioneer should have it under that part number. Just to be sure, have the IC locator number from the board (like IC 206 or similar) and order from Pioneer at 800-457-2881 It's a fairly standard 5.6 volt regulator. One could just add a diode in the ground leg of a 7805 regulator and do the same thing. Mark Z. "Kevin, VE1TV" wrote in message ... Hello Group! My Pioneer surround reciever went dead recently and it appears to be a failure of a regulator in the standby supply. It is marked 78M56A and identified on the pcb as NJM78M56. it's a TO-220 (mfr is JRC). I have been unable to locate any data on the web. I expect I could sub it with something if I knew what voltage it is meant to o/p. (maybe its variable). Can anyone help? Thanks! --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.775 / Virus Database: 522 - Release Date: 08/10/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.775 / Virus Database: 522 - Release Date: 08/10/2004 |
#4
|
|||
|
|||
This should be a 5.6 Volt regulator. You can have it verified by
contacting the parts rep for Pioneer. Jerry G. ======== "Kevin, VE1TV" wrote in message ... Hello Group! My Pioneer surround reciever went dead recently and it appears to be a failure of a regulator in the standby supply. It is marked 78M56A and identified on the pcb as NJM78M56. it's a TO-220 (mfr is JRC). I have been unable to locate any data on the web. I expect I could sub it with something if I knew what voltage it is meant to o/p. (maybe its variable). Can anyone help? Thanks! --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.775 / Virus Database: 522 - Release Date: 08/10/2004 |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
SCFM vs. CFM, also air flow/pressure across a regulator | Metalworking | |||
What to replace a blown voltage regulator... Cross referencing... | Electronics Repair |