HCD-GN77D - Sony Audio Service Manual (repair manual). Page 4

4

Press the 

[3]

  key on the remote commander and insert a DVD

dual layer disc following the message. Then the adjustment will
be made through the steps below, then adjusted values will be
written to the EEPROM.

1.

Sled tilt reset

2.

Disc check memory DL

3.

Wait 500 msec

4.

Set disc type DL

5.

LD on

6.

Spindle start

7.

Wait 1 sec

Layer 1 Adjust

8.

Focus servo on 0

9.

Auto track offset adjust

10. CLVA on
11. Wait 500 msec
12. Tracking on
13. Wait 500 msec
14. Sled on
15. Check CLV lock
16. Auto loop filter offset adjust, Auto focus adjust
17. Auto focus gain adjust
18. Auto focus offset adjust
19. EQ boost adjust
20. Auto loop filter offset adjust
21. Auto Track Gain Adjust

Layer 0 Adjust

22. Focus jump (L1 

t L0)

23. Auto track offset adjust L0
24. CLVA on
25. Wait 500 msec
26. Tracking on
27. Wait 500 msec
28. Sled on
29. Check CLV lock
30. Auto Focus Adjust
31. Auto focus gain adjust
32. Auto focus offset adjust
33. EQ boost adjust
34. Auto track gain adjust
35. All servo stop

Note: This mode is used for design, and not used in service fundamen-

tally.

On the Test Mode Menu screen, press the 

[2]

 key on the remote

commander, and the Operation Menu will be displayed. For the
manual operation, each servo on/off control and adjustment can
be executed manually.

## Drive Manual Operation ##

Operation Menu

 1. Disc Type
 2. Servo Control
 3. Track/Layer Jump
 4. Non EEPROM Write Adjust
 5. EEPROM Write Adjust
 6. Memory Check
 7. Disc Check Memory
 8. Error Rate Display
 9. SACD Water Mark

Exit: RETURN

>

.

In using the manual operation menu, take care of the following
points. These commands do not provide protection, thus requiring
correct operation. The sector address or time code field is dis-
played when a disc is loaded.

Note:
1. Set correctly the disc type to be used on the Disc Type screen.
2. In case of an alarm, immediately press the  

x

  button to stop the

servo operation, and press the  +/1  button to turn the power
off.

Basic operation:
(controllable from front panel or remote commander)
 +/1

: Power OFF (release the Test Mode)

 x

: Servo stop

 

Z

: Stop and eject/Loading

[RETURN]

: Return to Operation Menu or Test

Mode Menu

[       PREV]

, 

[NEXT      ]

: Transition between sub modes of

menu

[1] to [9], [10/0]

: Selection of menu items

Cursor  o / O

: Increase/Decrease in manually ad-

justed value

Disc Type

Disc Type Select

 1. Disc Type Auto Check
 2. Set Disc Type DVD
 3. Set Disc Type CD
 4. Set Disc Type Hybrid

Exit: RETURN

2-1-1.

Disc Type Auto Check

1)

Press the 

[1]

 key on the remote commander to display the Disc

Type Auto Check screen.

2)

Insert a disc and press the 

[ENTER]

  key on the remote

commander.

3)

It judges the type of inserted disc automatically and displays
the disc type and so on as below.

Disc Type Auto Check

 Disc Type

xx

 Layer

xx

 Mirr Time

xx

 Mirr Count

xx

 FZC Count

xx

 PI Reference xx
 PI Peak

xx

 ENTER.Execute

Exit: RETURN

Disc Type

: CD, DVD or Hybrid (SACD)

Layer

: SINGLE, DUAL or HYBRID

Mirr Time

: Mirror time of between disc surface and record sur-

face when disc type judgment. (hexadecimal num-
ber)