Md Test Mode - Aiwa XR-MD811 Service Manual

MD TEST MODE

Regarding the test mode and key operations for electrical adjustment:
It is not possible to operate in test mode using the keys only on the main unit alone.
It is mainly the keys on the remote control unit that are used.
Laser power select key:
The following preparatory step is necessary to enable laser power selection in test mode:
Connect the land between R304 (1.2 k ohms) and R305 (10 k ohms) near S304, S305 on the KEY board of the main unit and the land at S311 on
its R311 side with a 3.3 k ohms resistor. (See the following illustration.)
When this preparatory step has been implemented, the laser power can be switched using the VOLUME "-" key on the main unit.
When the test mode is completed, be sure to remove the resistor.
The contents of this test mode manual are as follows:
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1. How to start the MD test mode
2. Checking the MD test mode and checking the audio system output
3. How to cancel the MD test mode
4. How to switch to the servo standby mode
5. Checking the sled move operation
6. Checking the laser power
7. Checking the loading mechanism operation and checking the detection switch
8. Checking the servo operation
8-1. Checking the focus search and spindle kick no. 1
8-2. Checking the focus search and spindle kick no. 2 (checking the "S" curve)
8-3. Checking the focus servo and the sled error (EF balance)
8-4. Checking all servos on
9. Checking the address and error rate
10. How to erase U-TOC (user TOC)
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