SONY MCEF808K
Instrukcja Serwisowa

MCE-F808K

� Power Circuit (Power Circuit)

Check the Fuse NO YES Check the DC output of C777(+), C778(-) YES Check the DC power input of IC704 YES NO Replace the Fuse NO

Check the AC output of CN701 Pin 1, 5 YES Replace the D720

Replace the Transformer

NO

Check the AC output of CN701 Pin 7, 10 YES

NO Replace the Transformer

Check the DC power output of IC703 Pin 6, 24 YES Check the DC power (12V) of IC705 YES Check the 5V of IC706 Pin 2 (CD FUNCTION) YES NO NO NO

Check or Replace the D708,D709, D706, D707, D757, D758. Check or Replace the D702, D701

Check the �high� of D791(+) NO YES Replace the IC705 Check the �high� of D792(+) NO YES Refer to IC203, IC552, Troubleshooting Check the Voltage of IC301 Pin 84

END

Replace the IC706

� Muting Circuit (MUTE)

Dose �High� appear at Q701, Q751, Q251, Q201, �B� NO YES NO Check the �high� of the Q702 �E� (ONLY Q701/751) YES check the �Low� of Q701, Q751, Q251, �C� YES MUTE Replace the Q702 NO Refer to IC 301 Troubleshooting Refer to �IC 203 Troubleshooting (ONLY Q201/251)

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