KENWOOD KMD44
Service Manual

KMD-44
ADJUSTMENT
TEST MODE
1. To enter test mode While holding the "FM" key and preset "6" key, reset the unit. All indication segments are ON at the beginning of test mode. 2. To relese test mode Simply reset the unit. (NOTE) The test mode is not canceled by ACC OFF, power OFF, momentary power down. 3. MD receiver test mode specification Pressing the "Track Up" key jumps between tracks in the following order. No.7 / No.2 / No.13 / No.23 / No.30 / No.34 / No.7 (Same as the beginning) Pressing the "Track Down" key jumps to the previous track to the being played. Pressing the preset "1" key jumps to No.28 track. Again pressing the preset "1" key jumps to No.22 track. 4. Audio adjustment The volume is set to -10dB (which is shown as 30). Loudness is OFF. CRSC becomes OFF regardless of the functional excuse, too. The BASS/TREBLE and BALANCE/FADER controls can be set to the full boost/full cut and full front/full rear and full right/full left respectively by pressing the "Track Up" / "Track Down" keys. Sound coordination (system Q) doesn't appear for the Audio mode feed. G Adjustment Procedure (Note: During the adjustment procedure, be sure to turn off the power supply to the set.) 1. Pull up the IC11 50pin (LADJ1 (Check Land L1)) of the X33 Unit to BU5V (Check Land BU 5). 2. Pull out the Check Land ARF of X33 Unit and Check Land SAG (Servo GND) using wires so these can be monitored with an oscilloscope. 3. Turn the power on the set while resetting the set. * Adjustment should be conducted on total of three places: low-reflection pit and groove of the recordable disk and high-reflection pit of the pre-mastered disk. 4. When the disk is loaded, the set enters the adjustment mode. G For Recordable Disk 5. With the "TNo. 1" display, low-reflection pit beta play mode is entered. The display section of the time code shows "50." 6. While monitoring ARF with an oscilloscope, vary the focus bias with track up and track down key. 7. In order to calculate the optimum values, vary UP's and DOWN's and change the values at which the ARF waves are disturbed or 3T waveform levels goes down and calculate the center values for these. For example, if values are 58 for the UPside and 46 for the DOWN-side, the center value 52 would be the optimum value. 8. After obtaining the optimum value, set it to the value and press manual UP/DOWN key, which will confir m the value. (Normally, setting will be made by pressing on the track UP/DOWN key.) 9. After adjusting the low-reflection pit in 8, the pickup is automatically sent to the groove area. 10. With the "TNo. 2" display, the groove beta play mode is entered. 11. From this point on, it is the same as the above 6, 7, and 8. 12. After adjustment on the groove area, the set stops. Eject the disk and the adjustment is complete. � Since there is only TOC area for lowreflection pit, the play time is about 40 seconds. After the pit area, the set will enter retry movement, during which adjustments are not effective.

MDS-2500 Service Test Mode (Manual Adjustment Mode)
In order to adjust the focus bias (balance) of MDS-2500, automatic adjustment is conducted at factory and bias value is written on the E2PROM. When conducting adjustment on the set, the data in the E2PROM is read. Therefore, when changing the pickup for servicing, it is necessary to conduct focus bias adjustment again. If you are equipped with MDS-2000 AT3 Commander and jitter meter, it is possible to use automatic adjustment. We have prepared the service test mode (manual adjustment mode) in case MDS-2000 AT3 Commander and jitter meter are not available.

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