Aiwa XR-MDK109 Service Manual page 37

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2-2. How to Exit the MD Test Mode
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1) Press the "MD EJECT" button and remove the disc.
2) Disconnect the AC plug from the power outlet.
* If the machine exits the MD test mode by any methods other than the procedure described above, the machine may operate
abnormally when the POWER is turned on next time. If this happens, disconnect the AC plug.
2-3. Operation Check Mode
1) Checks after the test mode has started up
The following playback audio circuits can be checked.
• The circuits that can be checked: ..................... DAC, LINE AMP and HEADPHONE AMP
• Output level: .................................................... 1 kHz, -21 dB
2) Switch status check
The ON/OFF states of the respective switches on the machine and mechanism can be checked on the display.
Switch Name
REC PROTECT
REFRECT
INNER
3) How to Switch to Servo Standby Mode
When the MD test mode has been established, the mode changes to the servo standby mode and "ALL SV OFF" is displayed
by pressing the 9 button. The various check modes can be entered from this mode. Pressing the 9 button during each
operation returns to "ALL SV OFF".
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4) Checking the Sled Operation
The operation of the sled motor and pickup can be checked by pressing the
track) buttons in the "ALL SV OFF" state. "T.SLED FWD" appears while moving to the outermost track and "T.SLED
RVS" appears while moving to the innermost track.
5) Checking the Laser Output
The laser power output level is switched each time the "MD EDIT" button is pressed when "ALL SV OFF" appears and the
operation stops. The laser power output level is repeatedly changed in the order of OFF LASER READ ™ LASER 1/2 ™
LASER WRITE. The indications are as follows.
LASER 1/2 WRITE
After checking, press the 9 button to return the display to "ALL SV OFF".
*
6) Checking the Operation of OWH (Over Write Head)
The OWH operation can be checked in the loading-completed state.
"MD 2 CD" button ............. OWH DOWN
" / MD EJECT" button ...... OWH UP
Note: Do not move down the OWH while using a high reflection disc (CD).
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When the write-protection tab of a disc is closed to ON
When the high reflection disc (CD) is used
When the pickup is at the innermost
track (when the LIMIT switch is ON)
A L L
MODE
OFF ALL SV OFF
LASER READ LASER READ
LASER 1/2
LASER WRITE LASER WRITE
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8
Switch State
S V
Q Q
3 6 7 1 3
Indication on display
T-BASS
T-BASS
T-BASS
T-BASS
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2 9 9 4 2 8
Indication on display
ROCK Disc for record/playback
POP Disc for playback only
JAZZ
OF F
1 5 0 5 8 2 9 9 4
6
(to outermost track) and
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co
9 9
Usable disc
—
2 8 9 9
5
(to innermost