Special Tools; S/A Attachment Tool; S/A Attachment Tool Configuration; S/A Attachment Tool Function - Sony CDU31A Series Service Manual

2-2 SPECIAL TOOLS
2-2-1 S/A Attachment Tool
This tool is used to measure the open loop characteristics of
the Focusingff racking servo of the CD-ROM drive without
cutting its servo
~ircuit.
(I) S/A Attachment Tool Configuration (Refer to Fig. 2-2
(a))
(2) S/A Attachment Tool Function
Terminals
8
FB IN ... This terminal is connected to the BNC
(one end) Cable which leads from the CD-ROM
drive. (FE3 or TE3 test lands)
• FB OUT; .. This terminal is connected to the BNC
Cable (application) which leads from CH-I
channel of the analyzer.
8
ERR OUT ... This terminal is connected to the
BNC Cable (application) which leads from CH-2
channel of the analyzer or connected oscilloscope
probe.
8
ERR IN/DIS OUT ... This terminal is connected to
the BNC (one end) Cable which leads from
CD-ROM drive. (FE2 or TE2 test lands)
8
DIS IN ... 'This terminal is connected to the BNC
Cable (application) which leads from OSC
channel of the analyzer.
(i) +12V/ -12V/ GND ... These terminals have a
supplied voltage of +12V/ - 12V from power
supply.
Switch
0
SI... This switch is to stan the test.
(3) S/A Attachment Tool Circuit Diagram (Refer to Fig.
2-2 (b))
Fig. 2-2 (a) SIA Attachment Tool Configuration
2-2