23
Digital Signal Display Check
Input a digital video signal.
(CGA 14.318MHz)
Check IC206-6.
Is clock pulse inputted
approx.14.318MHz to
IC100-pin116
(VCOIN)?
2
Is proper video signal at
IC100?
Are J2-pin 9(MAC) and
10(A/D) at a high level?
IC28 failure.
Disconnect the signal cable
from J2.
Are proper signals outputted
at signal cable-
pin5,2,3,4,12,15
(R,G,B,r,g,b,A/D)?
Digital Video Signal Input
Circuit failure.
Signal cable failure.
No
No
No
No
Yes
Yes
Yes
Yes
1
8
7
Summary of Contents for QD-101MM
Page 39: ...38 6 CIRCUIT DIAGRAM PWB Fig 27 CIRCUIT DIAGRAM MAIN CIRCUIT No 1 ...
Page 40: ...39 Fig 27 CIRCUIT DIAGRAM MAIN CIRCUIT No 1 ...
Page 41: ...40 Fig 28 CIRCUIT DIAGRAM MAIN CIRCUIT No 2 ...
Page 42: ...41 Fig 28 CIRCUIT DIAGRAM MAIN CIRCUIT No 2 ...
Page 43: ...42 Fig 29 CIRCUIT DIAGRAM MAIN CIRCUIT No 3 ...
Page 44: ...43 Fig 29 CIRCUIT DIAGRAM MAIN CIRCUIT No 3 ...
Page 45: ...44 Fig 30 CIRCUIT DIAGRAM MAIN CIRCUIT No 4 ...
Page 46: ...45 Fig 30 CIRCUIT DIAGRAM MAIN CIRCUIT No 4 ...
Page 47: ...46 Fig 31 CIRCUIT DIAGRAM POWER CIRCUIT ...
Page 48: ...47 Fig 31 CIRCUIT DIAGRAM POWER CIRCUIT ...
Page 49: ...48 Fig 32 CIRCUIT DIAGRAM VIDEO CIRCUIT ...
Page 50: ...49 Fig 32 CIRCUIT DIAGRAM VIDEO CIRCUIT ...
Page 51: ...50 Fig 33 CIRCUIT DIAGRAM AUDIO CIRCUIT ...
Page 52: ...51 Fig 33 CIRCUIT DIAGRAM AUDIO CIRCUIT ...
Page 53: ...52 Fig 34 PWB PATTERN MAIN PWB FRONT SIDE ...
Page 54: ...53 Fig 34 PWB PATTERN MAIN PWB REAR SIDE ...
Page 66: ...PRINTED IN GERMANY ...
