Md Test Mode - Aiwa XR-HG7MD Service Manual

MD TEST MODE

1. Starting up the MD Test Mode
While pressing the MD function button, insert the AC plug into the outlet.
Notes: 1) Mechanical abnormalities are ignored while the test mode is starting up.
If any abnormality occurs, disconnect the plug immediately.
2) During test mode operation, playback and recording are not possible.
2. Checking the MD Test Mode
Indication
About five seconds after the test mode starts, characters are displayed as shown below on the display and the test mode becomes
usable.
3. Canceling the MD Test Mode
1) Keep pressing the MD EJECT button to eject the disk.
2) Disconnect the AC plug.
* If the MD test mode is canceled by procedures other than the above, the unit sometimes run incorrectly when the power is turned
on again. If this happens, disconnect the AC plug.
4. Switching to the Servo Standby Mode
After starting up the test mode, press the STOP button to switch to the servo standby mode. (Indication: ALL SVoFF)
Change from the this mode to other modes.
When the STOP button is pressed in each mode, the display returns to "ALL SVoFF".
4-1. Audio System Output Check
The signal of 1 kHz, -17 dBV (140 mV) can be checked using the MD board AOUTL, AOUTR in the test mode.
5. Checking the Sled Feed Operation
1) Press the CD ™ 1MD REC button to load the mechanism.
2) Press the F.SKIP button in the "ALL SVoFF" state to move the pickup to the outer circumference.
Then "T.SLED fwd" is displayed.
3) Press the B.SKIP button in the "ALL SVoFF" state to move the pickup to the inner circumference.
Then "T.SLED rvs" is displayed. Turn on the INSIDE LIMIT switch to turn on the graphic equalizer "CLASSIC".
4) After checking, press the B.SKIP button to move the pickup to the innermost circumference (CLASSIC lights) and press the MD
EJECT button to unload the mechanism.
6. Checking the Laser Power
1) Every time the EDIT button is pressed in the "ALL SVoFF" state, the laser power is switched. The display is switched as shown
below.
2) After checking, press the STOP button to return the display to "ALL SVoFF".
LA 1/2
LA READ LA WRITE
ALL SVoFF
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