Fostex CR200 Service Manual page 90

CR200
NOTE : * indicates the mechanism mode listed in the chart below.
No. Mechanism Mode
0 PLAY
1 OPEN
2 STOP
3 -
4 -
8-3. Judging Method of Unit
1. Look into the symptom thoroughly
• Check the location of fault (optical, electrical or mechanical system).
• Check if the disk is okay or faulty.
• Check if external unit connected to the CR200 is faulty.
2. Remembering the operation flow chart
Example of fault : The CR200 does not play.
• If the initial operation is completed.
• If the pickup is at initial position.
• If the laser diode is lighting.
• If the LD ON signal is output.
• If the lens is making the sweep operation.
• If the spindle is rotating.
• If the spindle is locked.
• If the FG signal is output.
• If the proper laser power is output.
• If the RF signal (eye pattern) is clear.
8-4. Judging Method of Pickup
Item
If the slider operation is normal ?
Check if the laser diode is lit.
Check if the lens is moving up/down.
8-5. Typical Cause & Symptom
Cause
The laser diode is not lit.
The laser diode is deteriorated.
The lens is dirty.
The coil is cut or broken.
The actuator is bent.
90
No. Mechanism Mode
5 SETUP
6 TOC read
7 -
8 SEARCH
9 REC/PAUSE
• Check the slider circuit and mechanism in the TEST mode.
• If not, check the LD ON signal.
• If the lens is dirty, clean it and check the RF level before and after cleaning.
• If not, check the actuator, FSC and TRK coil.
• Check if the actuator is bent by the contact with cleaning disc, etc.,
Frequency
• The unit does not focus-lock.
* * *
• The RF level is not normal. (Normal value : 1.2Vp-p at middle of test disk)
• The RF waveform is dirty.
• The FSCG or TRKG is small.
*
• TRK : The unit cannot close the TRK servo.
* *
• FSC : The unit cannot move the lens up/down.
• The TRK error level is small.
* * * *
• The unit cannot search the designated position.
No. Mechanism Mode
A REC
B TOC REC
C OPC
D TOC check
E PMA, actual pause recording
Checking Method
Symptom