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| Guest |
 Posted: Thu Jul 03, 2008 8:09 pm Post subject: |
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| vtech wrote: |
LA4598 is a discontinued product but is still available.
dload it's data sheet & use it as a reference to monitor the signal/voltages--at least you can verify it is not the output section. If you know the basics of signal tracing, it should not be difficult to pinpoint where the signal is getting lost & or muted, provided you have a scope. |
thanks for your response but have no scope,so you think the ic itself is not the culprit? |
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| vtech |
| Posted: Thu Jul 03, 2008 2:56 am Post subject: |
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LA4598 is a discontinued product but is still available.
dload it's data sheet & use it as a reference to monitor the signal/voltages--at least you can verify it is not the output section. If you know the basics of signal tracing, it should not be difficult to pinpoint where the signal is getting lost & or muted, provided you have a scope. |
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| frank |
| Posted: Wed Jul 02, 2008 11:23 pm Post subject: yamaha psr76 keyboard sound goog but low and no phones/aux |
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Hi; guys i got this Yamaha keybord that i found in the trush,it has good sound in both speakers but the only drawback is that the sound is very low dispite the volume is in the max.and no phones/aux output at all
no faut like hum nothing just too low,it has a power amp ic LA4598 which is discontinued. checked all ellectrolitics with a ESR tester all fine any ideas thanks in advance. |
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