Tracking servo is NG.
Is TE signal normal?
Check peripheral
circuit of IC306.
Check IC502.
6
Y
N
Signal waveform at
tracking servo ON (CD)
TE signal
Pin 151 (TP406) of IC401
1.65V
RFRP signal
Pin 153 (TP408) of IC401
Search ON (SRCH)
Pin 38 (TP411) of IC401
ON search
Tracking servo on
Signal waveform at
tracking servo ON (DVD)
Fig. 1-3-13
Fig. 1-3-14
Fig. 1-3-15
1-12
Summary of Contents for DD-8020
Page 2: ... ...
Page 6: ... ...
Page 30: ...2 10 ...
Page 34: ...3 4 ...
Page 39: ...Fig 3 4 5 4 3 3 Front Display Power Switch Block Diagram 3 12 3 11 FWD REV ...
Page 41: ...Fig 3 4 7 4 4 2 Logical System Block Diagram 3 16 3 15 ...
Page 44: ...Fig 3 5 3 5 2 Front Display Power Switch Circuit Diagram 3 22 3 21 ...
Page 47: ...Fig 3 5 5 5 3 2 Main Circuit Diagram 3 25 3 26 3 27 3 28 ...
Page 48: ...5 4 Output Circuit Diagram Fig 3 5 6 3 30 3 31 3 32 3 29 ...
Page 50: ...3 34 5 5 Motor System Circuit Diagram Fig 3 5 8 ...
Page 52: ...3 36 ...
Page 60: ......
Page 67: ......
Page 68: ......