HCD-GN77D - Sony Audio Service Manual (repair manual). Page 3

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0-2-5. Region

Model destination code is displayed. (2 digits number)

0-3-1. Sampling Check

EEPROM check at every 64 words.
It compares read data with write data of each address. When
there are discrepancies between two data, it displays error.

0-3-2. Detail Check

EEPROM check at every 1 word.
It compares read data with write data of each address. When
there are discrepancies between two data, it displays error.

Pull up/down setting check of the DVD system processor (IC207)
pin 150, 151 and 154 (for clock setting port).

SD bus data check between DVD decoder (IC701) and D-RAM
(IC706).

Output the color bars for video level adjustment.

On the Test Mode Menu screen, press the 

[1]

 key on the remote

commander, and the Adjustment Menu will be displayed.

 •Use DVD reference disc unless othermise indicated.

[DVD reference disc]
• LUV-P01 (4-999-032-01) (CD)
•TDV-540C (J-2501-235-A) (DVD-DL)
• TDV-520CSO (J-2501-236-A) (DVD-SL)

## Drive Auto Adjustment ##

Adjustment Menu

 0. ALL
 1. DVD-SL
 2. CD
 3. DVD-DL

Exit: RETURN

Normally, 

[10/0]

 is selected to adjust DVD (single layer), CD and

DVD (dual layer) in this order. But, individual items can be ad-
justed for the case where adjustment is suspended due to an error.
In this mode, the adjustment can be made easily through the op-
eration following the message displayed on the screen.
The disc used for adjustment must be the one specified for adjust-
ment.

Press the 

[10/0]

 key on the remote commander, and the servo set

data in EEPROM will be initialized. Then, 1. DVD-SL disc, 2.
CD disc and 3. DVD-DL disc are adjusted in this order.
Each time one disc was adjusted, it is ejected. Replace it with the
specified disc following the message. You can finish the adjust-
ment by pressing the 

[RETURN]

 button on the remote commander.

Note: During adjustment of each disc, the measurement for disc type judg-

ment is made. As automatic adjustment does not judge the disc
type unlike conventional models, take care not to insert wrong type
discs. Also, do not give a shock during adjustment.

Press the [1] key on the remote commander and insert a DVD
single 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 reset

2.

Disc check memory SL

3.

Wait 300 msec

4.

Set disc type SL

5.

LD on

6.

Spindle start

7.

Wait 1 sec

8.

Focus servo on 0

9.

Auto track offset adjust

10. CLVA on
11. Wait 500 msec
12. Tracking on
13. Wait 1 sec
14. Sled on
15. Check CLV on
16. Auto focus offset adjust
17. Auto focus gain adjust
18. Auto focus offset adjust
19. EQ boost adjust
20. Auto track gain adjust
21. All servo stop
22. EEP copy loop filter offset

Press the 

[2]

 key on the remote commander and insert a CD 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 rest

2.

Disc check memory CD

3.

Wait 500 msec

4.

Set disc type CD

5.

LD on

6.

Spindle start

7.

Wait 500 msec

8.

Focus servo on 0

9.

Auto track offset adjust

10. CLVA on
11. Wait 500 msec
12. Tracking on
13. (TC display start)
14. Wait 1 sec
15. Sled ON
16. Check CLV on
17. Auto focus offset adjust
18. Auto focus gain adjust
19. Auto focus offset adjust
20. EQ boost adjust
21. Auto track gain adjust
22. All servo stop