Friday, September 21, 2012

PANASONIC TC26LX20 TC32LX20 TC22LR30 Does not Record Audio to Disc




DOES NOT RECORD AUDIO TO DISC
     Is there an output signal to speaker terminals?  
If not, there is a problem in TV circuit.
If there is audio signal to speaker terminals, 
     Check the Power Supply to DVD RAM drive on the AP board.  Connector PAP-7, Pin-1 should have [12V].  
If not good, perform a Primary Power Supply check.
     If [12V] stated above is OK, check the Audio Switch IC {IC3102} on the 'A' board.  Left channel out on Pin-27 and Right channel out Pin-28.  
If not good, replce {IC3102}.
     If OK, check Pin-1 [DVD Left In] and Pin-3 [DVD Right In] on connector PA-10 on the 'A' board.  
If not good, check the signal line between PA-10 & IC3102.
     If OK, check Pin-48 & 50 for analog audio in on the connector P7402 on DVD RD board. 
If not good, check the audio interface IC {IC4001} and surrounding circuitry on the DVD RD board. 
     If Ok, check DVD M8 Digital Board and DVD-RAM Drive.