Sony MDS-JE470 Service Manual - Page 6
Jig For Checking Bd Board Waveform, Gnd : Ground
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MDS-JE470 JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-196-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows. GND : Ground I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser) IOP : For measuring IOP (Check the deterioration of the optical pick-up laser) TE : TRK error signal (Traverse adjustment) VC : Reference level for checking the signal RF : RF signal (Check jitter) FE : Focus error signal CN105 IOP TE VC I+3V GND FE RF 6 I+3V IOP GND TE FE VC RF 1 I+3V Iop GND TE FE VC RF 7 for MDM-7A
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6
MDS-JE470
JIG FOR CHECKING BD BOARD WAVEFORM
The special jig (J-2501-196-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be
performed are shown as follows.
GND : Ground
I+3V
: For measuring IOP (Check the deterioration of the optical pick-up laser)
IOP
: For measuring IOP (Check the deterioration of the optical pick-up laser)
TE
:
TRK error signal (Traverse adjustment)
VC
:
Reference level for checking the signal
RF
: RF signal (Check jitter)
FE
: Focus error signal
I+3V
Iop
GND
TE
FE
VC
RF
I+3V
IOP
GND
TE
FE
VC
RF
1
7
for
MDM-7A
I+3V
CN105
IOP
TE
VC
GND
FE
RF