3-8
ELECTRICAL TROUBLESHOOTING GUIDE
Check
U802 pin111, 112
signal.
Check U804
pin37 “DRM_CKE”
signal.
Check PN804
pin2 “USB_D-”,
pin3 “USB_D+”
signal.
Check PN804
pin4 “+5 V”.
Check U802
pin116 “USB_D+”,
pin117 “USB_D-”
signal.
Check U802
pin16,87 “DAC_BCK”,
pin80,88“ DAC_LRCK”,
pin83 “DAC_DATA”
data signal.
Normal.
Check R826,R881,
R888,R886,R883.
Check U809.
Check U804.
Check TX802, U802.
Check FB12, FB13.
Check USB connector.
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
USB abnormal
YES
Summary of Contents for MCD206
Page 11: ...2 2 MEMO ...
Page 13: ...2 5 2 6 MEMO MEMO ...
Page 15: ...2 8 3 SPEAKER SECTION MCS206F A60 ...
Page 39: ...3 33 3 34 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 40: ...3 35 3 36 2 SMPS P C BOARD 3 FRONT P C BOARD ...
Page 41: ...3 37 3 38 4 KEY P C BOARD 5 USB P C BOARD 4 1 LEFT KEY 4 2 RIGHT KEY ...
