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The delivery of this manual was very fast, less than 8 hours. The manual is very clear and concise, and helped a great deal in the repair and final setup of the Hitachi HMA-G2 Amplifier.
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Great service. The manual was exactly what I was looking for: schematic + layout. I managed to fix the player. Highly recommended!
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At $5,00 certainly good bang for your buck. Includes electric schematics as well as exploded parts view + parts list for reordering. Unfortunately no details on the PCB contents or working, but then again, this is not overly complex. Best bonus: this manual does contain the heavily searched for LED error codes as well as descriptions for test operation. Haven't gotten around to fixing the machine yet, one thing the manual won't do for you is getting it out of the kitchen assembly :-(
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It`s not your fault tear down is rather incomplete. It doesn`t have complete instructions as to deconstruction for repair.
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THANK YOU FOR A GOOD TRANSACTION, NICE COPY, CLEAR
<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.
S S
Then, confirm the values of [I ** E within the following range. [ ** ] ......................... 04~0A
S
] 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.
S S S
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.
�7�
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