Sony MVC-CD300 Service Manual page 78

3. TROUBLESHOOTING THE DDX-G2100
Caution:
Before starting to replace the drive unit, be sure to turn off the main power. If the drive unit is replaced with the main power ON, communication
can become difficult (due to boot mode) or the optical laser unit can be damaged. When the main power is once turned off and back on again
while the adjustment is in progress, press the [Renewal] button without starting the electrical adjustment software. If the message appears in
the Device Select Run as the [Renewal] button is pressed, it indicates that there are no problems.
CONTENTS
1. Laser Power Adjust
1-1. EEPROM preset → NG
1-2. Cover Switch Check → NG
1-3. Read Power → NG
1-4. LD Initial Check → NG
1-5. Front Monitor Gain → NG
SKEW Adjust → NG
2.
3. Read (CD) Adjust
3-1. Adjust FE → NG
3-2. DPP (Differential Push-Pull: One of the Tracking Error Detection Methods) Balance → NG
3-3. TE Gain Offset → NG
3-4. Focus Gain, Tracking Gain → NG
3-5. Focus Bias RF → NG (Judgment is not performed.)
3-6. MPP Out Adjust → NG
3-7. RF Gain → NG (Judgment is not performed.)
3-8. RF Jitter Check → NG
4. Write (CDR) Adjust
4-1. Jump Adjust → NG
4-2. Adjust WFB → NG (Judgment is not performed.)
4-3. ATER (Absolute Time in pre-groove Error Rate) Check → NG
4-4. Focus Bias ATIP (Absolute Time In Pre-groove) → NG (Judgment is not performed.)
4-5. Read Asymmetry After ATER → NG
4-6. Self RF Jitter → NG (Judgment is not performed.)
4-7. Seek Check → NG
4-8. Shock Level Adjust → NG
5. Write (CDRW) Adjust
5-1. RW FE → NG
5-2. Focus Gain, Tracking Gain → NG
5-3. Erase Focus Gain → NG
5-4. ATER (Absolute Time in pre-groove Error Rate) Check → NG
5-5. Read Asymmetry After ATER → NG
5-6. BLER (Block Error Rate) Check → NG
5-7. Self RF Jitter → NG (Judgment is not performed.)
5-8. Write Drive ID → NG (Judgment is not performed.)
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