AIWA LCXMD211
Service Manual

<MD>
� Perform 1~3 adjustment when display showing [NO ADJUST]. 1. Temperature Compensation Adjustment � Test point: Check on the display. � Tool : Thermometer � Adjustment procedure 1) After MD test mode has started up, press "s" button to display [ALL SVOFF]. 2) Press "DISPLAY" button to display [TEMP = ]. 3) Press "T-BASS" button to display [T + ** C ± ##]. 4) Put the thermometer near the MD mechanism to measure the room temperature. 5) Adjust the indication value ** using "l" and "j" buttons until the value is the same as room temperature. Press "ENTER" button after adjusting. 6) Ptess "s" button to display [ALL SVOFF] after adjusting. 7) After adjustment is completed, once again set the display to [TMP + ** C ± ##] and check the value that has been caluculated with the addition or subtraction of the numerical values of ## in relation to the ** value. This value is to be the same sa room temperature. NOTE: Do not perform this adjustment if it is not possible to measure the room temperature.
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Then, confirm the values of [I ** E within the following range. [ ** ] ......................... 04~0A
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] in the display are

[

] ......................... 09~15

5) Press "DISPLAY" button again. Confirm the values of [F ** T ## S I I] in the display are within the following range. [**] ........................... 1A~45 [##] ........................... 00~03 [I I] ........................ 00~03 6) Press "s" button to display [ALL SVOFF]. Adjustment for PIT disc 1) Insert the TGYS-1 test disc. 2) Press "s" button to display [ALL SVOFF]. 3) Press "JOG MODE" button to display [SEL PIT]. 4) When pressing "MD function" button, [AUTO ADJ] is displayed and adjustment start. After adjusting, [DONE] is displayed. (If [failed] is displayed, the adjustment failed.) 5) Press "s" button to display [ALL SVOFF]. Checking IVR, EFB and focus/tracking/sled gain of PIT disc Perform the same procedures as for MO disc and check that the display is within the range below; [IVR]..............................14~19 [EFB]..............................09~15 [FOCUS GAIN].............1A~45 [Tracking gain]...............00~3F [Sled gain]......................00~3F 4. Checking Error Rate (PIT disc) 1) Insert the TGYS-1 test disc. 2) Move the pickup to the center track using "g" or "f" buttons. 3) Press "JOG MODE" button to display [SEL PIT]. 4) Press "E" button to display [FOCUS ON]. 5) Press "ENTER" button to switch the mode to [AL SV ON]. Then press "DISPLAY" button twice to display [00 ** 000]. 6) Check the value of ** is below [30] at this time. 7) Press "s" button to display [ALL SVOFF]. 5. Checking Record/Playback Error Rate (MO disc) 1) Insert the MDW-60 test disc. 2) Move the pickup to the center track using "g" or "f" buttons. 3) Press "JOG MODE" button to display [SEL GRV]. 4) Press "MD REC" button to display [R ANALOG]. 5) Press "E" button to display [FOCUS ON]. 6) After displaying [ALL SV ON] by pressing "ENTER" button, press "SYNCRO REC" button. 7) Recording begins after OWH has moved when "MD REC" button is pressed once again. At this time, display will change from [ALL SV ON] to [A0600C ## S]. 8) Press "s" button after recording has progressed for about 15 seconds, changing the display to [ALL SVOFF]. 9) Press "MD EJECT" button to raise the OWH. 10) Press "E" button to display [FOCUS ON]. 11) Once [ALL SV ON] has been displayed by pressing "ENTER" button, press "DISPLAY" button to display [A **** C ## S]. After **** reaching 600, press "DISPLAY" button once again to display [00 // 000]. Check that the value of // is below than [20] at this time.
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2. Laser Power Adjustment � Test point: Pickup laser output � Tool : Laser power meter � Adjustment procedure 1) Starting in the [ALL SVOFF] status, press "EDIT" button three times to change the display to [LA WRITE]. 2) Press "T-BASS" button once and change the display to [LASER = **]. 3) Measure the laser output of pickup with the laser power meter and adjust output by "g" or "f" buttons so that the measurement value becomes 6.8mW ± 0.03mW. Press "ENTER" button after adjusting. 4) Press "s" button to display [ALL SVOFF] after adjusting. Caution: There is a possibility that pickup may be damaged if laser output exceeds 7.0mW. 3.Auto Sequence Adjustment (EFB/IVR/FOCUS AGC/TRACKING AGC adjustment) � Test disc: MDW-60, TGYS-1 Adjustment MO disc 1) Insert the MDW-60 test disc. 2) Press "s" button to display [ALL SVOFF]. 3) Press "JOG MODE" button to display [SEL GRV]. 4) When pressing "MD function" button, [AUTO ADJ] is displayed and adjustment start. After adjusting, [DONE] is displayed. (If [FAILED] is displayed, the adjustment failed.) 5) Press "s" button to display [ALL SVOFF]. NOTE: 1.As there is a posibility that adjustment may not be able to adequately performed if the disc is dirty or scratched, make sure to keep the disc clean. 2.When using a MO disc, one section will be erased in order to change it to WRITE POWER, so a special disc is to be used. Checking for IVR, EFB and focus/tracking/sled gain of MO disc 1) Move the pickup to the center track using "g" or "f" buttons. 2) Press "E" button to display [FOCUS ON]. 3) Press "ENTER" button to switch the mode to [ALL SV ON]. 4) Press "s" button and "DISPLAY" button twice.

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