This unit went out a week ago, I just wanted to make sure it didn't come back. This was really a unique situation, I think. Kept coming back with bad solder connections in different circuits. Final tally: 1. Hum in audio. Found bad caps on NCDG5010..front panel PCB. Caps around Q951, Q953, Q952. Also, solder connections on transistors 2. Then found bad solder, circuit traces NCAR4985 main PCB near Q971, Q972, 73, 74, R1901-1904. Checked traces, and repaired on a very heat stressed PCB. 3. Unit came back no volume in one channel(left I think). Found ring crack on volume control. 4. Then unit came back, no sound in left channel. Had to remove the heat sink and circuit from center of unit to get to the PCB with the outputs on it #NCAF4988. Q512 had bad solder on it. Repaired connections. This is another one that ate my time, but I got paid.
Jeff Dougherty Intrepid Video TV/VCR 263 S Front St Steelton PA 17113 fax...717-564-4952 www.intrepid-video.com www.tech-repair.net ----- Original Message ----- From: "Intrepid Video Support" <[EMAIL PROTECTED]> To: "Tech List" <[EMAIL PROTECTED]> Sent: Monday, February 23, 2004 10:44 AM Subject: [Techs] TA Onkyo TS-SV919THX..No left channel(It's back again...) This unit came if for a hum in speakers. This was repaired by replacing many caps supplying the -/+ 5v regs. Took it home, he brought it back for no left channel. Found ring crack on volume control.repaired, had it all hooked up when he got here so he could check it out..took it home and no left channel...AGAIN. So, it's back now..Does anyone have suggestion before I rip this apart again? I damaged the ribbon cable from the front control..that I had to repair from taking this apart so many times. I did find I have audio signal from the PCB with the volume control on all channels. I do not have any signal getting to the output transistor for the left channel. This thing is become a pain as there are no markings on the printed side of this board. I do have a partial schematic thanks to Mr. Larkman. Any ideas, suggestions would be appreciated.. Thank you. _______________________________________________ Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. www.intrepid-video.com www.tech-repair.net Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com
