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PostPosted: Sat Jul 05, 2008 6:53 am    Post subject: MITSUBISHI CS-2015R Reply with quote

Very weak audio output.
I replaced the AF output amplifier LA4270 but no any change.
Has anybody the schematic?

PostPost subject: Advertisement


Joined: 05 Jul 2008
Posts: 1
Location: PA

PostPosted: Sat Jul 05, 2008 7:54 pm    Post subject: Reply with quote

Could be the speaker itself dry rotted , I've had to replace them on that brand before,
also might be about the vintage that had the infamous conductive
glue. Look on both sides of the board for a brownish glue. It becomes
conductive over the years leading to almost any kind of random
failure. Eventually it can even corrode the copper traces.
Remove all occurances thoughly
Jesse Mack

Joined: 22 May 2008
Posts: 600
Location: The Last Frontier

PostPosted: Tue Jul 08, 2008 11:05 am    Post subject: Reply with quote


IF there is no or low signal at IC201 Pin 4 check for open L300. (Located on main PCB PT# 327P073020). Also check for a missing 6V at pin 39 of IC201. Check for a Shorted or leaky C335 (.01UF) off of Pin 39 of IC201 on the main pcb.

Hope this helps.

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