Aiwa XR-FD55, Руководство по обслуживанию, Страница: 89 / 114

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ADJUSTMENT -1/13
MD Adjustment
Depending on the content of repair, such as when the new mechanism, pickup and MD C.B. are combined, the test mode must be set,
and various adjustments may be required.
The adjustment procedure is as follows:
(1) Set to the test mode and perform the adjustment and check listed below depending on the component replaced.
(2) Press the POWER button to terminate the test mode (this will write data to EEPROM).
After performing the above, reset the mechanism to start.
TEMP
reference
setting Checking
values set in
EEPROM Writing
adjustment values
to EEPROM Writing
adjustment values
to EEPROM All AUTO
adjustment (1st) All AUTO
adjustment (2nd) AUTO
adjustment Grating a
djustment
Operation check
(after executing
AUTO main adjustment)
TEMP EEPROM_SET Releasing test mode AUTO_YOBI AUTO_ADJ GRATING AUTO_YOBI
Releasing test mode
TEST-PLAY TEST-REC
Pickup
Component Replaced
Required item
Head
Mechanism
Main C.B
MD microprocessor
MD LSI
RF IC
EEPROM IC
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Numbers in the table show the order of implementation.
" – " means that the items are unnecessary.
When the test mode is complete, the results of writing to EEPROM will appear.
OK_EEPROM: Writing of "Setting values" and " Preliminary adjustment completed" has been normally executed.
WR_EEPROM: Writing of "Setting values" has been normally executed, but wiring of "Preliminary adjustment
completed" has not been executed.
NG_EEPROM: Writing of "Setting values" has not been executed.
Check the connection between MD microprocessor and EEPROM.
* When measuring TEST PLAY, TEST REC operations, or C1 error, etc., be sure to perform these after completing AUTO adjustment,
so that they can be measured in the optimum servo status.
1. Preparation for adjustment/check
Test discs
Type Test disc Part code
High-reflection disc
1
2
3
TDYS-1 [for playback] 4-963-646-01
Low-reflection disc Disc for checking recording operation (generally available disc used) --------------------
Low-reflection disc Disc for main adjustment (MDW-74/GA-1) 4-229-747-01
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