Sled Motor won't stop
Edited by mbb at 2017-07-23 07:34Hi
My old Sony D350 has the known Motorspindle Problem... no other Problems it works fine .
I put the Motor out ... mhh take lookinside... so far so good ( WOW filigree Brushes !)
Bearing clearance... how to measure ... i lubricate the Bearings andinstall the Motor
Orginal Sony Power Supply connected to the Player...
it start to spinbut the Sled runs inside an will not stop...:dizzy:
OK Screws out check the Sled Switch... works ...
I put the D350 in Service Mode
Sled back and forthCheck
Focusup and down Check
Laser is on ...
Spindleruns ...
I test the 5v and 3.5V... mhh 3.8V and 3.6Vso I turn the 5VTrimmer to get 5V ... ( measured with a Digital Multimeter )
Input Power 11.9 V
Any Ideas ?
Thanks Meinhard
8/5000
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. Edited by mbb at 2017-07-26 13:29
Before i open the D350 it worked .... never a Problem with the Sled
So i measure on Pin 163.5V - Switch closed 0.00.. V
I measure on Pin 1 ... 1.7V and on Pin 19 ... 3.5V like the Spec's
Tomorrow i will measure all 48 Pin ,,, maybei found something ...
PS : Thanks for the Service Manuals !
Edited by mbb at 2017-07-29 23:44
Hi
So here the Measurements of the IC CXA1272
No CD .. not in Servicemode
Iactivate for a few seconds S901 and read the Values
I'm not sure about the " Play " Status Valuessome match ... other not ?
confused ...
PS: i have an old analog Scope ... my Skills are low ... but i can try some Test Points if needed
PPS: where can i get these black "Felt Strips"to save the loose Wires ?
Pin1- 1.76V
Pin2- 1.76V
Pin3- 1.67V
Pin4- 1.74V
Pin5- 1.76V
Pin6- 1.76V
Pin7- 2.08V
Pin8- 1.76V
Pin9- 1.70V
Pin 10 - 3.59V
Pin 11 - 1.76V
Pin 12 - 1.76V
Pin 13 - 1.76V
Pin 14 - 0.82V
Pin 15 - 1.76V
Pin 16 - 3.59V or 0V if the Switch moved
Pin 17 - 0.73V
Pin 18 - 3.48V
Pin 19 - 0.00V
Pin 20 - 3.56V
Pin 21 - 3.39V
Pin 22 - 3.36V
Pin 23 - 3.15V
Pin 24 - 3.32V
Pin 25 - 3.25V
Pin 26 - 0.00V
Pin 27 - 1.90V
Pin 28 - 1.90V
Pin 29 - 2.31V
Pin 30 - 2.63V
Pin 31 - 3.59V
Pin 32 - 2.47V
Pin 33 - 0.00V
Pin 34 - 0.00V
Pin 35 - 0.00V
Pin 36 - 0.00V
Pin 37 - 3.55V
Pin 38 - 1.76V
Pin 39 - 1.76V
Pin 40 - 1.39V
Pin 41 - 0.13V
Pin 42 - 3.50V
Pin 43 - 0.00V
Pin 44 - 0.00V
Pin 45 - 1.76V
Pin 46 - 1.76V
Pin 47 - 1.76V
Pin 48 - 1.76V
ohoh ... i found the Error ....
I put the Main Flex (toSystem Control / LCD IC ) out and in ...
it worked...
CD in ... runs ...
I think and thinkwhat have i done ... and "Murphy" ist everywhere:dizzy: so ireconnect all the Flexcable ...
The Flex looked goodmaybe a mm at the wrong Side and the "Fun" begins ...?? Great!
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