Sanyo FISHER DVD-1500 Service Manual page 23

TROUBLE SHOOTING (CHECK WAVEFORM)
-Respond to numbering of each list of "CHECK FLOW AND TROUBLE SHOOTING"
(36)
DVD one-layer
FOCUS DRV.
IC601 25pin
FE
TP513
spindle
IC601 22pin
Internal circumference External circumference
SLED
IC601 20pin
When pick is seting a lot to ex
(38)
Auto adjust. DVD two-layer
FOCUS DRV.
IC601 25pin
FE
TP513
TE
TP512
SLED
IC601 20pin
(40)
DEFECTdetection
RF
DFTN
IC508
6pin
RPO
ternal circumference
Internal External
Servo aligment
One layer
External
Servo aligment
DFTN : When LOW is DPT output MUTE
(TRACKING OFF)
(37)
Auto adjust. CD
FOCUS DRV.
IC601 25pin
FE
TP513
TE
TP512
SLED
IC601 20pin
VRA
Internal External Internal
Internal
Servo aligment
Two layer
External
Servo aligment
(41)
RF
DFTN
IC508
6pin
RPO
- 22 -
Normal initial
data read
data read
DEFECTdetection : FUNGER PRINT
DFTNsignal don't became LOW