LC-20E1E (serv.man2). Precautions, operations, dimensions, removing major parts, adjustment procedure and troubleshooting table - Sharp TV Service Manual (repair manual). Page 17

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19
LC-20E1E
TROUBLE SHOOTING TABLE
 (Continued)
No sound 
(2/2)
No sound from SCART
SCART sound failure
TV sound failure
Check all the settings microprocessor's adjust process menu.
 Is output at pins 36 and
 Check IC1901 and its
 Is input at pins 
53 and
 Check theire lines and
 Is output at pin 11
 Check the tune
r and
 37 of IC1901 normal?
No
 peripheral parts.
 54 of IC1901 normal?
No
 theire peripheral parts.
 of tuner normal?
No
 its peripheral parts.
Yes
 Is output at pins 1 and 
 Check IC1902 and its
 Is output at pins
 27 and 
 Check IC1901 and its
 Is input at pins 67 and
 Check IC19
01 and its
 7 of IC1902 normal?
No
 peripheral parts.
 28 of IC1901 normal?
No
 peripheral parts.
 69 of IC1901 normal?
No
 peripheral parts.
Yes
Yes

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