CD TEST PROCEDURES
CD ALIGNMENT PROCEDURESbutton until TO lights up). The meter should
read approximately 90mVdc.
(WITH FIXTURE)
2.4 Simulate a closed CD door by placing
Note: Some of these procedures require
an object between S501's two black posts
the use of a CD alignment fixture (P/N
(the CD door latch can be used). Select CD
176318). Alternate procedures that do not
(S413).
require a fixture begin on page 30. Refer to
Figure 11, CD Alignment Fixture Test
2.5 After the focusing operation is com-
Setup. The fixture is required unless other-
pleted, press ERASE (S403). The meter
wise specified. Refer to Figure 13 for
should change from its previous reading in
adjustment locations.
step 2.3 (it will drop). If not, remove power
and repeat the test.
Test Equipment Needed
Digital Voltmeter
2.6 Adjust R51 until the meter reads1
Frequency Counter
between -7 to 17mVdc.
Sony Disc YEDS-18
¨
Bose CD Alignment Fixture (176318)
3. E/F Balance (E/F)
1. PLL Free Run Frequency (VCO)
3.1 Advance the alignment fixture (ADV
Note: This test does not require a test disk
button) to the E/F setting and set the
or the alignment fixture.
voltmeter to read DC voltage.
1.1 Connect the frequency counter to PCK
3.2 Simulate a closed CD door by placing
and ground.
an object between S501's two black posts
(the CD door latch can be used). Load the
1.2 Simulate a closed CD door by placing
YEDS-18 test disc, select CD (S413), and
an object between S501's two black posts
play track 2.
(the CD door latch can be used). Select CD
(S413).
3.3Press ST ORE (S411). This puts the unit
in the E/F balance mode. The time display
1.3 Adjust R558 until the frequency counter
will stop.
reads 4.320MHz ? 20kHz. (If the adjust-
ment is not done within 4 seconds, then CD
3.4 Adjust R506 until the meter reads
must be selected again).
between - 10 to + 50mVdc.
2. Tracking Offset (TO)
4. Tracking Gain (TG)
Note: Remove any previously loaded test
4.1 Shut the unit off.
disc. This test will not work with a disc
loaded.
4.2 Advance the fixture to the TG setting
and set the voltmeter to read AC voltage.
2.1 Connect the cable from the test fixture
to connector P504 on the unit.
4.3 Simulate a closed CD door by placing
an object between S501's two black posts
2.2 Connect a DC voltmeter to the positive
(the CD door latch can be used). Load the
(+) and negative (-) terminals on the test
YEDS-18 test disc, select CD (S413), and
fixture.
play track 2.
2.3 Select TO on the fixture (press the ADV
4.4 Adjust R510 until the meter reads
between 440 to 500mVrms.
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ACEC
