| Author |
Message |
| gilloz |
 Posted: Mon Feb 05, 2007 4:07 am Post subject: |
|
| CLICK HERE to go to a website that will show you how to test transistors. You might have to hold down the CTRL key to bypass pop-up blockers. |
|
 |
| JGrimaldi |
| Posted: Sun Feb 04, 2007 8:17 pm Post subject: |
|
| As Ivan said, if there is DCV the anp will kill the output to protect your speakers, and bypassing the relay if this is the case will damage your speakers. What you can try is disconnecting the speakers, bypassing the relay, and taking a meter to the amp output and check it for DCV. |
|
|
| Ivan |
| Posted: Wed Jan 03, 2007 2:50 pm Post subject: Transistors |
|
| Correction. Case should be correctly called the Collector and is usually connected to the case. |
|
|
| Ivan |
| Posted: Wed Jan 03, 2007 2:48 pm Post subject: transistors |
|
| This may be a bit difficult if you are not that familiar with electronics, but here goes. Transistors have 3 leads, Case, base, and emitter. With power off, power cord unplugged, give it a few minutes or longer for any caps to discharge. With an ohm meter, check the leads in any order for shorts. These power transistors are usually mounted on a heatsink and at that time, probably plugged into a socket. Hopefully the pins are accessible. the Case lead is the case of the transistor if its metal. Usually, one channel of the 2 channel amp will fail, so you can compare the readings from the left and right side. A low resistance or zero ohms indicates a bad transistor. Part numbers are on the transistor case. |
|
|
| Guest |
| Posted: Wed Jan 03, 2007 12:14 am Post subject: |
|
| Well I'm definitely hearing music how do I test the transistors? |
|
|
| Guest |
| Posted: Tue Jan 02, 2007 8:44 pm Post subject: |
|
| Since I changed the relay the music from the amp has gotten louder and volume meter has gone higher as well. What should I do next |
|
|
| Ivan |
| Posted: Tue Jan 02, 2007 8:33 pm Post subject: relay, amp |
|
| If the relay is used to disconnect the speakers from the amp during turn-on, it also monitors DC voltage and will not energize if DC voltage from the amp is present. It is used to protect the speakers. It sounds like the amp has blown a transistor (or cap) and DC voltage is present at one side of the relay. If you jumper the relay, you may damage your speakers....Do you know how to test power transistors with a meter, with power off? At high enough volume levels you will hear audio from the transistors on these older models. |
|
|
| Guest |
| Posted: Tue Jan 02, 2007 7:29 pm Post subject: |
|
| I've changed capacitors and relay still no luck anyone have any other ideas |
|
|
| Morrowrj |
| Posted: Mon Jan 01, 2007 2:37 pm Post subject: |
|
| It is possible but very unlikely. To test it you could jumper out the contacts and see if it works, but you have to get the right ones and depending on size it could be tough. |
|
|
| G_2442 |
| Posted: Sun Dec 31, 2006 4:26 pm Post subject: |
|
Yeah I opened it up there doesn't seem to be any damage to the components. I fuses inside look good to.
Can I Relay go bad? |
|
|