Poor Focus; Sound (For Audio Model Only) - Acer AC511 Series Service Manual

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READJUST FOCUS CONTROL
6-9 NO SOUND (OPTIONAL WITH AUDIO ONLY)
ADJUST VOLUME CONTROL
OK
ENSURE THE SOUND SOURCE
IS POWER ON
OK
ENSURE THE SOURCE CABLE
CONNECTION

6-8 POOR FOCUS

NG
CHECK IC501
PIN 14 ABOUT 14V
OK
18
CHECK FOCUS CONTROL UNIT,
FOCUS LEAD WIRE, CRT SOCKET & CRT
NG
CHECK POWER
SUPPLY CIRCUIT
OK
CHECK IC501
NG
IC501 FAILURE
OK
SPEAKER FAILURE