Sony MZ-S1 service manual 336###S, 741AD, 771AD, 772AD, 773AD, 774AD, 775AD, 776AD

•Change of NV Adjusted Values (version 1.100)

Caution: Change the NV adjustment values according to the mi- crocomputer version.

In this set, some adjusted values were set in the manual mode at the shipment, but these will be cleared when the NV is reset. Therefore, modify the NV adjusted values through the following procedure immediately after the NV was reset.

1.Item numbers in which the NV adjusted values are to be modi- fied

–Change ABCD gain [Hpit] initial value (item number 336) Caution: The ABCD gain [Hpit] initial value must be changed before the overall adjustment.

–Change BatFlg value (item number 741)

–Change NiRec0 to 4 values (item numbers 771 to 775)

–Change NiPb 1 to 4 values (item numbers 776 to 779, 781)

–Change CLV drive voltage limiter (item numbers 865, 866)

–Change x2 CLV speed gain, +6dB compared to conventional (item numbers 867, 868)

–Change x2 CLV phase gain, +3dB compared to conventional (item numbers 871, 872)

–Change x2/x1 switching temperature threshold value (+10° C t +5° C) (item numbers 873, 874)

2.NV adjusted values modifying procedure

1)Select manual mode of the test mode, and set item number 336 (see page 16).

Set LCD display

336###S**

###: Address

**: Adjusted value

2)Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes 08.

3)Press the X key to write the adjusted value.

4)Select manual mode of the test mode, and set item number 741 (see page 16).

Set LCD display

741AD **

**: Adjusted value

5)Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes 02.

6)Press the X key to write the adjusted value.

7)Select manual mode of the test mode, and set item number 771 (see page 16).

Set LCD display

771AD **

**: Adjusted value

8)Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes 6E.

MZ-S1

9)Press the X key to write the adjusted value.

10)Select manual mode of the test mode, and set item number 772 (see page 16).

Set LCD display

772AD **

**: Adjusted value

11)Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes 7C.

12)Press the X key to write the adjusted value.

13)Select manual mode of the test mode, and set item number 773 (see page 16).

Set LCD display

773AD **

**: Adjusted value

14)Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes 7D.

15)Press the X key to write the adjusted value.

16)Select manual mode of the test mode, and set item number 774 (see page 16).

Set LCD display

774AD **

**: Adjusted value

17)Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes 7F.

18)Press the X key to write the adjusted value.

19)Select manual mode of the test mode, and set item number 775 (see page 16).

Set LCD display

775AD **

**: Adjusted value

20)Adjust with the [VOL +] key (adjusted value up) or [VOL --]key (adjusted value down) so that the adjusted value becomes 81.

21)Press the X key to write the adjusted value.

22)Select manual mode of the test mode, and set item number 776 (see page 16).

Set LCD display

776AD **

**: Adjusted value

21