CMT-PX333, HCD-PX333 - Sony Audio Service Manual (repair manual). Page 8

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• In checking the MD mechanism deck section (MDM-7X2A), prepare two extension jigs (Part No. J-2501-100-A: 1.00 mm 27 core and

Part No. J-2501-198-A: 1.00 mm 17 core).

• In checking the CD mechanism deck section (CDM55A-21BD53), prepare extension jig (Part No. J-2501-075-A: 1.00 mm 21 core.)

MD mechanism deck section
(MDM-7X2A)

CN103

BD (MD) board

CD mechanism deck section
(CDM55A-21BD53)

Connect extension jig (J-2501-198-A) to the
BD (MD) board (CN103) and MD DIGITAL board (CN1004).

Connect extension jig (J-2501-100-A) to the
BD (MD) board (CN102) and MD DIGITAL board (CN1003).

CN1004

CN1003

CN101

BD (CD) board

CN1005

CN1002

MD DIGITAL board

Connect extension jig (J-2501-075-A) 
to the BD (CD) board (CN101) and 
MD DIGITAL board (CN1002).

CN1005

Pin 

2

 (GND)

Pin 

3

 (OUTSW)

CN102

harness

In performing the operation check with the CD mechanism deck section removed from the main unit, the CD disc loading will be disabled if
the connector cable between MD DIGITAL board (CN1005) and LOADING board (CN151) is disconnected. Accordingly, make preparation
through the following steps.
1. Insert the CD disc for test with the set assembled.
2. Unplug the AC power cord to turn the power off, and remove the CD mechanism deck section. (Disconnect the connector cable between

MD DIGITAL board (CN1005) and LOADING board (CN151), and also the connector cable between MD DIGITAL board (CN1002)
and BD (CD) board (CN101))

3. Connect the CN1005 pin 3 (OUTSW) and pin 2 (GND) on the MD DIGITAL board with a lead wire.
4. Connect the connectors between MD DIGITAL board (CN1002) and BD (CD) board (CN101) with the extension tool (part No.: J-2501-

075-A).

Under this condition, the CD can be played but the disc loading operation is disabled.

After checking, disconnect the lead wire connected in step 3.