Sony MDSJE320 Service Manual - Page 5
Servicing Note
UPC - 027242541344
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SECTION 1 SERVICING NOTE JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-124-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. 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) TEO : TRK error signal (Traverse adjustment) VC : Reference level for checking the signal RF : RF signal (Check jitter) RF VC TEO IOP I + 3V CN110 Mechanism deck Jig (J-2501-124-A) FORCED RESET The system microprocessor can be reset in the following way. Use these methods when the unit cannot be operated normally due to the overrunning of the microprocessor, etc. Method : Disconnect the power plug, short-circuit jumper wire of JW70 and JW181. [MAIN BOARD] (Component Side) Jumper wire IC301 JW70 BT301 JW181 - 5 -