55
56
TROUBLESHOOTING
PCB CIRCUIT BOARD
4. MIC(Karaoke)Board Debug
NO SOUND
Is there Audio singal
at pin#1,7 of Output board’S
IC202?
Check C293,C283 and
JK201 PIN#1.3
Is there Audio singal
at pin#2,6 of Output board’s
IC202?
Check IC202,C282,C292,
R282 and R292
Is there Audio singal at pin#2
of Output board’s P202?
Check P202,PJ901
Is there Audio singal at pin#7
of IC902?
Check IC902
Is there Audio singal at pin#6
of IC902?
Check R907,C910
Is there Audio singal at
pin#15 of IC901?
Check IC901
Is there Audio singal at pin#16
of IC901?
Check JK903,R916,
R917 and C909
Is there Audio singal at pin#1 of
IC902?
Check IC902
Is there Audio singal
at pin#2 of IC902?
Check L901,C903,R903,
L902,C904,R904
Is there Audio signal
JK901,JK902
Change the JK901,JK902
Check the MIC
•
Analog Board parts
Summary of Contents for DW-K3AD2N-DS
Page 8: ...11 BLOCK DIAGRAM...
Page 9: ...12 BLOCK DIAGRAM...
Page 10: ...13 BLOCK DIAGRAM P201 P201 IC201 A SW NJM4052BM IC101...
Page 14: ...17 BLOCK DIAGRAM...
Page 15: ...18 SCHEMATIC DIAGRAM...
Page 16: ...19 SCHEMATIC DIAGRAM...
Page 17: ...20 SCHEMATIC DIAGRAM...
Page 18: ...21 SCHEMATIC DIAGRAM...
Page 19: ...22 SCHEMATIC DIAGRAM...
Page 20: ...23 SCHEMATIC DIAGRAM...
Page 34: ...42 DISASSEMBLY 41 DISASSEMBLY DW K3BD2N DS DW K3BD2N DS...
Page 43: ...60 59 PCB CIRCUIT BOARD Mpeg SYSTEM parts PCB CIRCUIT BOARD 2 DW K3BD2N DS DW R632...
Page 44: ...62 61 PCB CIRCUIT BOARD Mpeg Audio parts PCB CIRCUIT BOARD Mpeg Video parts...