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DW - S114X
3. Playback Power Adjustment
@ Objective
To optimize the playback power of the laser diode.
@ Symptom when out of | Play does not start, track search is impossible, track are skipped.
adjustment
@ Measurement instru-
| Shine the light dischrged from | @ Player state
Laser diode (LD) ON
ment connections
the objective lens on the light
power meter sensor.
;
@ Adjustment location
| VRS (PB. PW)
[Settings]
Wavelength 790nm
@ Disc
None needed
Average mode
[Procedure]
1, Open the disc tray.
2. Short-circuit the pins 1 and 2 of TP connector CN1026 (TP205). (Refer to fig. 1.)
3. Move the pickup to the position where shineable the light discharged from the objective lens on the light power meter
sensor.
4. Lights up the playback laser diode by laser diode (LD) ON.
5. Shine the light discharged from the objective lens in the pickup on the light power meter sensor. Adjust VR5 (PB.PW)
so that the playback laser diode output is an average 0.68 mW + 0.02 mW.
6. Turn off the all servos, and release the short-circuit of TP connector CN1026 (TP205).
Notes : Do not open the disc tray after the TP connector CN1026(TP20S) is short-circuited. The clamp motor will be
locked. If the clamp motor is locked, refer to the "Note 1 : How to open the tray manually" in section 6.
DISASSEMBLY (page 53).
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