Denon DRA-F107 Service Manual page 14

(6) PHONO PLAY
Check Power Supply Voltages for PHONO
INPUT B'D PHONO BLOCK
WP11 :4pin-7V,5pin +7V
Check Analog signal input for FUNCTION IC
MAIN B'D
[IC21]:49,50pin LOUT,ROUT
to CD/USB in
(7) Head Phone OUT
Check Analog signal output forom FUNCTION IC
MAIN B'D
[IC21]:54pin LOUT,47pin ROUT
Check Power Supply Voltages for Head Phone Amp
INPUT B'D H/P AMP BLOCK
Check Mute Control signal for Head Phone
INPUT B'D H/P BLOCK
WP11 :13pin HP_MUTE Low Level OK?(-7V)
Check Analog signal output from Head Phone Amp
INPUT B'D H/P BLOCK
[IC13]:1pin LOUT,7pin ROUT
END
O.K.
O.K.
Mark
O.K.
O.K.
O.K.
O.K.
DRA-F107 / DRA-F107DAB
Check Soldering.
N.G WP11 :4pin-7V,5pin +7V
WC11 :4pin-7V,5pin +7V on Main B'D
Check Soldering.
[IC21]:80,1pin PHONO_L,PHONO_R
N.G
IC11
JK11
Check Soldering.
N.G MAIN B'D
[IC21]:54pin LOUT,47pin ROUT
Check Soldering.
N.G
Check Soldering.
INPUT B'D H/P BLOCK
N.G WP11 :13pin HP_MUTE
MAIN B'D
WC11 :13pin HP_MUTE
Check Soldering.
N.G INPUT B'D H/P BLOCK
IC13
Q105,Q106,Q107,Q108
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