29
MPU Circuit Check
Press the RESET
switch.
Is clock pulse of
approx.7.987MHz at
IC400-pin2?
Does IC400-pin7 changed the level
from "L" to "H" after power is turned
on?
Is IC400-pin5 and pin64 always
high after turning the power on?
Is clock pulse of approx.4MHz
outputted from IC400-pin15?
Go to Digital Signal
Display Check.
7.987MHz oscillating circuit
failure.
Failure of reset circuit or its
peripheral circuits.
IC400 failure.
Failure of power off detection
circuit or its peripheral circuits.
IC400 failure.
IC400 failure.
No
No
No
No
Yes
Yes
Yes
Yes
1
2
3
4
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 ...
