Sharp 8C221 Service Manual page 23

Checked Circuit
Video A 7plifier
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,
Make TP804 be
grounded.
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If the both legs
of R457 are
shorted, does
picture appear?
Checked Circuits
l
Audio Output Circuit
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Hum is created
When the pin 6 of 1301 is
grounded, does sound
come out?
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No
Check for the
voltage at the
3
- -
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,
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NO PICTURE (SOUND IS NORMAL)
Check for the voltage at the
collector, emitter and base
of Q208 and Q209.
Normal
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Apply main ripple to the 1
pin 1 of 1302 via 0.1/S
capacitor and 47K ohm
resistor.
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Normal (12.5V)
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S p e a k e r I
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