Budm,
Where do you get those fuse resistor ? Do digikey or mouse have it ? What is the specs on those resistor ? Thanks.
newbiesat
Member
Last Activity: 04-14-2014, 04:00 PM
Joined: 12-14-2012
Location: oxnard,ca
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Re: HARMAN KARDON AVR235 repair
Budm,
Where do you get those fuse resistor ? Do digikey or mouse have it ? What is the specs on those resistor ? Thanks.
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Re: HARMAN KARDON AVR235 repair
Thank you budm for your info and congrats. Have a question about those replace caps .... Are those caps located in the same board ??? CUP 11747-4 or CUP 11747-5 in schematic ??Leave a comment:
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Re: Sony amp "protect" issue
Get you voltmeter and put in "continuity" test with your receiver "power off". Measusing Pin 9 (B+) with pin 1, 2, 3, 4, 5, and 6 to check if any short out inside IC. If you can hear the beep sound then you IC is bad. Doing the same with pin 7 (B-) with pin 1, 2, 3, 4, 5, and 6. Good luck
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Re: Onkyo tx-nr509 power supply problem
Thanks BUDM for your quick response. I have solved the problem with this unit. All the trouble was causing by bad "IC STK443-530" that drive all the C, FL, FR Channel and FL channel was blown inside the IC when compare with the same IC.Leave a comment:
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Re: Onkyo tx-nr509 power supply problem
There are 4 protection cc in diagram (attached). The VOLH, PROTECT_VCC, VPROTECT, and IPROTECT....Leave a comment:
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Re: Onkyo tx-nr509 power supply problem
Here is the most recent voltage measurement (attached file)....Leave a comment:
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Re: Onkyo tx-nr509 power supply problem
Thank you BUDM. I found the crack in the board for the ground line.. that was caused 5v on the ground... Now the unit have 20Vac in and 20Vdc out at D6901.. And it have the problem when the unit turn on, it only stay for 2 seconds and shut down.. protection mode ? ... I still don't know why it's still not send 40Vac come from YEL (S1H+) and GRN (S1H-) post....Leave a comment:
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Onkyo tx-nr509 power supply problem
Hello all,
I have the problem with this model in that at pin 2 and 3 on D6901 (see diagram attached) I could not get any AC voltage. All the voltage measurement included in the diagram. Any ideas?
Thank you in advance for all your help.... -
Re: Yamaha HT-R4065 won't start
Do you check the output transistors to see any short out ?Leave a comment:
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Re: Onkyo HT-R591 keeps clicking
Hi Tom,
How do you disassemble the transformer to fix the thermal fuse ? Any tutorial or step would be appreciate. Thank you in advance....Leave a comment:
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Re: Onkyo HT-R591 keeps clicking
It may be a "BLOWN AMP" that causing. Do you check those output transistors to find if anything shorted?Leave a comment:
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Re: Sony str-dh800 "resistor short"
Never mind... The unit has been fixed... There was a bad IC uPC2785v that causing the resistors shorted.
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Sony str-dh800 "resistor short"
Hello all,
I'm having a problem with this unit in that every time the unit turn on it will short out the resistor R601 and R602 (see attached). Alreay tried to replace the resistor but it still short out.... Would welcome to any ideas/suggestion to anyone... Thanks in advance.... -
Re: Need help repairing an audio amp schematics included
Those 2 points that budm mention should be across the resistor R288 (100K/1W) in the schematic diagram, page 6.
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Re: Sansui R-303, Distorted audio......
Checking the resistor value from the output pin 5 and pin 12 by using the digital multi-meter (DMM). Usually it is 4.7 ohm. The bad one never give the correct value. Must power-off the unit before measuring the value of resistor. Good luck.
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Re: Vendor selling 7907 voltage regulator !!!
Hello all,
Thanks again for all of your contribution to this topic. I finally able to get those -7v regulator (KIA7907PI) from encompassparts.com and bring back alive the sony str-dg820 receiver without the "protector" message display.
ns
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Re: Vendor selling 7907 voltage regulator !!!
Thank you all for your comments/ideas. However, does it make difference to replace both with +/-6v or +/-8v? I mean which one is better and more safer... not to destroy other components... By the way, there is other parts KIA7907PI that sold on amazon... but currently not available
..
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Re: Vendor selling 7907 voltage regulator !!!
Hi budm,
The regulator use on Sony Receiver STR-DG820. Thanks.Leave a comment:
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Vendor selling 7907 voltage regulator !!!
Hello all,
Having question to look for 7907 voltage regulator but could find any vendor selling it (already try mouser, digikey, mcmelectronics but do not get any return). Please help and thank you in advance.
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Re: No output on center channel Sony STR-K502P
Hi there,
Here is the relay part number that sold on ebay "OSA-SS-224DM5 DC 24V 5A 250V 6PIN Power Relay" for $3.49 and ship from China. Good luckLeave a comment:
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