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The SLED LIMIT SWITCH is used to detect the laser whether it has arrived the zero original position. The switch connects the servo IC: CXA1272. Once the 1272 receives a Low level signal, it will stop the sled motor. In your question, you can manually push the switch when the laser is moving towards zero position. If the sled motor stops, the control circuit should be OK, pls check why the laser couldn't hit the switch? If the sled motor doesn't stop, it might be something wrong with the 1272, or power supply of 1272. In my history of repairing 1500+ vintage CD players, I've never seen a dead 1272 or 1271. Pls take a look the mechanical parts whether the laser successfully hit the switch.
The spindle motor is MABUCHI RF410. |
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Post time 2017-07-23 07:27:38
Post time 2017-07-26 09:41:01
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