MDS-PC1 - Sony Audio Service Manual (repair manual). Page 6

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Use the jig (J-2501-124-A or J-2501-149-A) to facilitate the checking of the waveform of the BD board. The names and check items of each
terminal are as follows.

I+3V : For measuring the IOP (check if the optical pick-up laser has weakened)
IOP

: For measuring IOP (check if the optical pick-up laser has weakened)

TEO : TRK error signal (traverse adjustment)
VC

: Reference level for checking signals

RF

: RF signal (jitter check)

Perform forced reset if the unit does not operate normally due to the hangup of the microprocessor.
It is recommended that this be performed when the test mode and retry cause display mode cannot be exited, or when the unit does not
operate normally when reassembled after being disassembled.

Method:Disconnect the power plug from the outlet, short-circuit the JW143 and 164 (RESET) of the MAIN board using a pair of tweezers,
and discharge the backup battery.

JW143

JW164

IC401

CN307

IC101

CN110

6P connector

GND can not be used.

Mechanism deck

Jig

(J-2501-124A)

Jig

(J-2501-149A)

RF

VC

TEO

IOP

H-3V

RF

VC

TEO

IOP

I+3V

GND