CDP-XA555ES - Sony Audio Service Manual (repair manual). Page 5

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5
SERVICE  POSITION  OF  SERVO  BOARD
In servicing the SERVO board, erect the board as shown below.
In this case, the CN201 and CN202 connectors are disconnected respectively, and accordingly the buttons on the front panel do not
function.
Therefore, use the Remote Commander for fundamental operations such as PLAY and STOP.
Also, in performing the service under this condition, the stabilizer is not detected, so refer to “How to Operate the Set without Using
Stabilizer”.
disconnect CN201
disconnect CN202
SERVO board
HOW  TO  OPERATE  THE  SET  WITHOUT  USING  STABILIZER
As this set detects the stabilizer, if servicing the set in other than normal operating way, disable the stabilizer detecting function by the
following method.
The stabilizer is detected before TOC is read, and after that, this function does not operate.
That is, the stabilizer detection is executed after power on or immediately after disc loading, and you can release your finger after the disc
was recognized.
Intercept the D202 on SERVO board 
with your finger.
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