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CDP-S3 SECTION 5 ELECTRICAL ADJUSTMENTS
E-F Balance (1 Track jump) Check
oscilloscope BD board TP(TEO) TP(DVC)
1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given. 2. Use LUV-P01 (4-999-032-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10Mâ¦ impedance. 4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks. S-Curve Check
BD board TP(FEO) TP(DVC) Oscilloscope
Procedure : 1. Connect an oscilloscope to TP (TEO) and TP (DVC). 2. Turn Power switch on. 3. Load a disc (LUV-P01) and playback the number nine track. 4. Press the N button. (Becomes the 1 track jump mode.) 5. Confirm that the level B and A (DC voltage) on the oscilloscope waveform.
1 track jump waveform center of waveform B DVC level=1.0 Â±0.5Vp-p symmetry A (DC voltage)
Procedure : 1. Connect an oscilloscope to TP (FEO). 2. Connect between TP (FEI) and TP (DVC) ( 1.65 V) by lead wire. 3. Turn Power switch on. 4. Load a disc (LUV-P01) and actuate the focus search. (In consequence of open and close the disc tray, actuate the focus search) 5. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 2 Â± 0.5 Vp-p.
S-curve waveform symmetry
6. Adjust RV101 on the BD board so that the center of waveform becomes the same voltage of DVC. (i.e. A=0V) Adjustment Location: [BD BOARD] (Conductor Side)
A within 2 Â±0.5Vp-p B
6. After check, remove the lead wire connected in step 2.
Note : â¢ Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7. â¢ Take sweep time as long as possible and light up the brightness to obtain best waveform.
RF Level Check
BD board TP(RFDC) TP(RFAC) TP(DVC) oscilloscope
TP (DVC) TP (RFAC) 15 1 IC103 16 30 TP (FEO) TP (TEO) 40 41 TP (RFDC)
IC101 60 61
Procedure : 1. Connect an oscilloscope CH1 to TP (RFDC) and CH2 to TP (RFAC). 2. Turn Power switch on. 3. Load a disc (LUV-P01) and playback. 4. Confirm that oscilloscope waveform is clear and check if RF signal level is correct or not.
Note : Clear RF signal waveform means that the shape â â â can be clearly distinguished at the center of the waveform.
RF signal waveform VOLT/DIV : 200mV TIME/DIV : 500ns
level : 0.65 Â±0.15Vp-p (RFDC) 1.1 Â±0.4Vp-p (RFAC)