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MDS-NT1
CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS IN MD
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5. Electrical Adjustments”.
Note: This set uses optical
| Criteria for Determination | Measure if unsatisfactory: |
| (Unsatisfactory if specified value is not satisfied) | |
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Laser power check | • 0.90 mW power | • Clean the optical |
Specified value : 0.84 to 0.92 mW | • Adjust again | |
| 0.90 to 0.96 mW | • Replace the optical |
| • 8.40 mW power |
|
| Specified value : 8.1 to 8.7 mW |
|
| 8.4 to 8.9 mW |
|
| • Iop (at 8.4mW) | • Replace the optical |
| Labeled on the optical |
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| Iop value ± 10mA |
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Auto check | • Unsatisfactory if displayed as “NG: XXXX” | • Replace the optical |
NG |
| |
| (XXXX is arbitrary number) |
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Temperature | • Unsatisfactory if displayed as “T=@@ (##) [NG” | • Check for disconnection of the circuits around |
compensation | NG | D101 (BD board) |
offset check | (@@, ## are both arbitrary numbers) | • Check the signals around IC101, IC201, CN102, |
| CN103 (BD board) | |
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Note:
The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.
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