SONY MDSMS717
Instrukcja Serwisowa

8.

FOCUS BIAS ADJUSTMENT

9.

ERROR RATE CHECK

Adjusting Method: 1. Load a continuously recorded disc (Refer to �4. Creating MO Continuously Recorded Disc�) to slot 1. 2. Turn the [       =         SELECTOR        dial and display �CPLAY +         ] MODE�. 3. Press the [ENTER/YES] button and display �CPLAY MID�. 4. Press the [MENU/NO] button when �C = AD = )� is displayed. 5. Turn the [       =         SELECTOR        dial and display �FBIAS +         ] ADJUST�. 6. Press the [ENTER/YES] button and display � / a= �. The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [a=] indicate the focus bias value. 7. Turn right the [       =         SELECTOR       dial and find the focus +         ]   bias value at which the C1 error rate becomes 220. (Refer to note 2.) 8. Press the [ENTER/YES] button and display � / b= �. 9. Turn left the [       =         SELECTOR        + dial and find the fo        ] cus bias value at which the C1 error rate becomes 220. (Refer to note 2.) 10. Press the [ENTER/YES] button and display � / c= �. 11. Check that the C1 error rate is below 50 and ADER is 00. Then press the [ENTER/YES] button. 12. If the �( )� in � - ( )� is above 20, press the [ENTER/YES] button. If below 20, press the [MENU/NO] button and repeat the adjustment from step 2 again. 13. Press the [REPEAT] button and press the § button to remove the continuously recorded disc.
Note 1:The relation between the C1 error and focus bias is as shown in the following figure. Find points a and b in the following figure using the above adjustment. The focal point position c is automatically calculated from points a and b. Note 2:As the C1 error rate changes, perform the adjustment using the average vale.

9-1. CD Error Rate Check Checking Method: 1. Load a test disc TDYS-1 to slot 1. 2. Turn the [       =         SELECTOR        dial and display �CPLAY +         ] MODE�. 3. Press the [ENTER/YES] button and display �CPLAY MID�. 4. �C = AD = )� is displayed. 5. Check that the C1 error is below 20. 6. Press the [MENU/NO] button, stop playback, press the [REPEAT] button, and remove the test disc. 9-2. MO Error Rate Check Checking Method: 1. Load a continuously recorded disc (Refer to �4. Creating MO Continuously Recorded Disc�) to slot 1. 2. Turn the [       =         SELECTOR        dial and display �CPLAY +         ] MODE�. 3. Press the [ENTER/YES] button and display �CPLAY MID�. 4. �C = AD = )� is displayed. 5. If the C1 error is below 50, check that ADER is 00. 6. Press the [MENU/NO] button, stop playback, press the § button, and remove the continuously recorded disc. (To exit from the TEST mode, press the [REPEAT] button.)

11. ADJUSTING POINTS AND CONNECTING POINTS
[BD BOARD] � SIDE A �

CN101

10. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount. Checking Method: 1. Load a continuously recorded disc (Refer to �4. Creating MO Continuously Recorded Disc�.). 2. Turn the [       =         SELECTOR        dial and display �CPLAY +         ] MODE�. 3. Press the [ENTER/YES] button and display �CPLAY MID�. 4. Press the [MENU/NO] button when �C = AD = )� is displayed. 5. Turn the [       =         SELECTOR        dial and display �FBIAS +         ] CHECK�. 6. Press the [ENTER/YES] button and display � �. / c=

D101

[BD BOARD] � SIDE B �

CN107 GND

C1 error 220

The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c=] indicate the focus bias value. Check that the C1 error is below 50 and ADER is 02. 7. Press the [ENTER/YES] button and display � / b= �. Check that the C1 error is not below 220 and ADER is not above 02 every time. Focus bias value 8. Press the [ENTER/YES] button and display � / a= (F. BIAS) �. Check that the C1 error is not below 220 and ADER is not above 02 every time. 9. Press the [MENU/NO] button, next press the § button, and remove the continuously recorded disc.
Note 1:If the C1 error and ADER are above 02 at points a or b, the focus bias adjustment may not have been carried out properly. Adjust perform the beginning again.

IC316

b

c

a

IC121 TP68 (FE) TP95 (RF) IC101 TP58 (VC) TP69 (TEO)

TP30 (IOP�)

TP29 (IOP+)

� 17 �

� 18 �