Akai AC-410

5-2.CD PLAYER SECTION
TEST MODE FOR CD PLAYER'S OPERATION
Some
adjustments
of
the
CD
PLAYER
section
are
automatically
carried
out
by
the
micro
computer.
if
the
CD
player
section
is
defective
and
it
is
necessary
to
partially
check
the
operation,
“CD
TEST”
mode
can
be
used
while
repairing.
Engaging the “CD TEST” MODE
While
pressing
and
holding
both
the
“CD1”
and
“p(F)”
buttons,
plug
in
the
AC
power
cord
to
the
AC
outlet.
Note :
*
During
“CD
TEST”
mode,
only
the
DISC"1”
open/close
button
can
be
used
for
loading.
So,
place
a
disc
on
“TRAY
1’.
* Proceed testing by pressing the “CD1” button once for each testing step.
*
To
disengage
the
“CD
TEST”
mode,
press
the
“POWER
ON/STANDBY”
button
or
disconnect
the
AC
power
cord
from
the
AC outlet.
FUNCTION
Initial condition of the “CD TEST” mode.
|r ¢rest-1) [Pertorm “focus search”.
T4 (TEST-4) |E-F balance adjustment is carried out automatically and its data value is displayed on the FLD.
T5 (TEST-5) |Mode of the “Tracking gain” adjustment.
T6 (TEST-6) |Tracking gain adjustment is carried out automatically and its data value is dis
T7 (TEST-7) {Normal playback mode is engaged.
Turn on the “focus servo’.
1. Test disc (SONY TYPE-III)
. Play back
3. JW44 and VR1200
TC-DK PCB
PT TILAAAALLL AAD dded dhhehedddeddedidetideds
. Connect the hot side probe of m AC
milivoltmeter to JW44 on the BIAS OSC
PCB and GND side probe to the chais is.
Adjust the VR1200 on the TC-DK PCB until
indication of the AC milivoltmeer is
maximum.
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