HCD-GN1200D, MHC-GN1200D - Sony Audio Service Manual (repair manual). Page 20

Protection VACS) and “C” represent  APVACS level which is 
triggered.

[DVD SERVICE MODE]
•  This mode let you make diagnosis and adjustment easily by 

using the remote commander and TV. The instructions, diag-
nostic results, etc. are given on the on-screen display (OSD).

Procedure:
1. Press 

 

 button to turn on the system.

2.  Select DVD function.
3. Press 

Y

 button and [OPEN/CLOSE] button simultaneously 

and then turn [MASTER VOLUME] knob clockwise.

4.  The message “SERVICE IN” appears on the fl uorescent indi-

cator tube and the Top Menu of Remocon Diagnosis Menu ap-
pears on the on-screen display on the TV. The model name and 
revision number is displayed at the bottom of the on-screen 
display.

Remocon Diagnosis Menu

0.    External Chip Check

1.    Servo Parameter Check

2.    Drive Manual Operation

3.    Emergency History Check

4.    Version information

Model name       :  XXXXX-XX

IF-con

 :  Ver.XX.XX(XXXX)

Syscon               :  Ver.X.XXX

5.  To execute each function, press its number by using numeric 

button on the remote commander.

6.  To release from this mode, press  button to turn off the sys-

tem.

In order to execute IOP measurement, the following standard 
procedures must be followed.

Remocon Diagnosis Menu

0.    External Chip Check

1.    Servo Parameter Check

2.    Drive Manual Operation

3.    Emergency History Check

4.    Version information

Model name       :  XXXXX-XX

IF-con

 :  Ver.XX.XX(XXXX)

Syscon               :  Ver.X.XXX

2.  Select “2. Drive Manual Operation” by pressing [2] button on 

the remote commander. The screen will appear as follows.

Drive Manual Operation

1.    Servo Control

2.    Track/Layer Jump

3.    Manual Adjustment

4.    Mech test mode

5.    MIRR time adjust

0.    Return to top Menu

3.  Select “3. Manual Adjustment” by pressing [3] button on the 

remote commander. The screen will appear as follows.

Manual Adjust

1.    Track Balance Adjust :

2.    Track Gain Adjust :

3.    Focus Balance Adjust :

4.    Focus Gain Adjust :

5.    Eq boost Adjust :

6.    Iop :

7.    TRV. Level :

8.    S curve (FE) Level :

9.    RFL(PI) Level :

0.    MIRR Time :

Y9Change value

RETURN   Return to previous menu

4.  Select “6.Iop” by pressing [6] button on the remote 
 commander.
5.  Wait until a hexadecimal number appear as follows.

Manual Adjust

1.    Track Balance Adjust :

2.    Track Gain Adjust :

3.    Focus Balance Adjust :

4.    Focus Gain Adjust :

5.    Eq Boost Adjust :

6.    Iop :

ED :

7.    TRV. Level :

8.    S curve (FE) Level :

9.    RFL(PI) Level :

0.    MIRR Time :

Y9Change value

RETURN   Return to previous menu

6.  Convert data from hexadecimal to decimal using conversion 

table.

7. Please 

fi nd the label on the rear of the BU (Base Unit).

 

The default IOP value is written in the label.

8.  Subtract between these two values.

9.   If the remainder is smaller than 93 (decimal), then it is OK.
 

However if the value is higher than 93, then the BU is defec-
tiveand need to be change.

10. Press 

0 RETURN

 button on the remote commander to return 

to previous menu.

11.  Press [0] button on the remote commander to return to the Top 

Menu  of Remocon Diagnosis Menu.

12. Press 

 

 button to turn off the set.