DOWNLOAD Sony DAV-HDX274 / HCD-HDX274 Service Manual ↓ Size: 5.31 MB | Pages: 96 in PDF or view online for FREE

1.  DVD  SERVICE  MODE  GENERAL  DESCRIPTION
This mode let you make diagnosis and adjustment easily by using 
the remote commander and the TV screen. The instructions, diag-
nostic results, etc. are given on the on-screen display.
Be sure to execute the IOP measurement when a base unit is re-
placed.

2.  ENTERING  DVD  SERVICE  MODE
Procedure:
1.  Press the [

?

/

1

] button to turn on the system.

2.  Press the [FUNCTION] button repeatedly to select the 

“DVD”.

3.  While pressing the [

s

] and [

A

] buttons simultaneously, turn 

[VOLUME] dial in the direction of (+) with the DVD player in 
power on.

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

dicator tube and top menu of the Remocon Diagnosis Menu 
appears on the on-screen display on the TV screen as follows. 
The model name, IF-con version and Syscon version are dis-
played 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

4. Version Information

Model Name 

:xxxx_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 the [

?

/

1

] button to turn off the 

system.

3.  EXECUTING  IOP  MEASUREMENT
In order to execute IOP measurement, the following standard pro-
cedures must be followed.
Procedure:
1.  From the top menu of Remocon Diagnosis Menu, select “2 

Drive Manual Operation” by pressing the [2] button on the 
remote commander. The following screen appears on the on-
screen display

 

Drive Manual Operation

1. Servo Control

2. Track/Layer Jump

3. Manual Adjustment

4. Mecha test mode

5. MIRR time Adjust

0. Return to Top Menu

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

the remote commander. The following screen appears on the 
on-screen display.

 

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:

[

V][v]  Change Value

[RETURN]Return to previous menu

3.  Select “6. Iop:” by pressing [6] button on the remote com-

mander.

4.  Wait until a hexadecimal number appear in the on-screen dis-

play as below.

 

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:

[

V][v]  Change Value

[RETURN]Return to previous menu

5.  Convert data from hexadecimal to decimal by using conver-

sion table.

6.  If the value is smaller than 93 (decimal), then it is OK. How-

ever if the value is higher than 93, then BU (base unit) is defec-
tive and need to be change.

7.  Press the [

O

 RETURN] button on the remote commander to 

return to previous menu.

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

top menu of Remocon Diagnosis Menu.

9.  Press the [

?

/

1

] button to turn off the system.

4.  CHECKING  EMERGENCY  HISTORY
To check the emergency history, please follow the following pro-
cedure.
Procedure:
1.   From the top menu of Remocon Diagnosis Menu, select “3. 

Emergency History” by pressing the [3] button on the remote 
commander. The following screen appears on the on-screen 
display.

 

Emg. History Check

Laser Hours     CD    999h  59min
                DVD   999h  59min

01. 01 05 04 04      00 92 46 00
    00 00 00 00      00 00 23 45

02. 02 02 01 01      00 A9 4B 00
    00 00 00 00      00 00 23 45

[Next]Next page [Prev]Prev page
[0]Return to Top Menu

2.  You can check the total time when the laser is turned on during 

playback of DVD and CD from the above menu. The maxi-
mum time, which can be displayed are 999h 59min.

3.  You can check the error code of latest 10 emergency history 

from the above menu. To view the previous or next page of 
emergency history, press the [

l

] or [

L

] button on the re-

mote commander. The error code consists of three kinds of er-
ror codes. 

 

Example of Error code

01. 01 05 04 04      00 92 46 00
    00 00 00 00      00 00 23 45

The meaning of error code is as below:
01: Communication error (No reply from syscon)
02: Syscon hung up
03: Power OFF request when syscon hung up
19: Thermal shutdown
24: MoveSledHome error
25: Mechanical move error (5 changer)
26: Mechanical move stack error
30: DC motor adjustment error
31: DPD offset adjustment error
32: TE balance adjustment error
33. TE sensor adjustment error
34. TE loop gain adjustment error
35. FE loop gain adjustment error
36. Bad jitter after adjustment
40. Focus NG
42. Focus layer jump NG
51: Spindle stop error
52. Open kick spindle error
60: Focus on error
61: Seek fail error
62: Read Q data/ID error
70: Lead in data read fail
71: TOC read time out (CD)
80: Can’t buffering
81: Unknown media type

B. Parameter of error code
This is the detail of error code. 

 

Example of Error code

01. 01 05 04 04      00 92 46 00
    00 00 00 00      00 00 23 45

C. Time of error code
This is the laser time when an error occurred.

 

Example of Error code

01. 01 05 04 04      00 92 46 00
    00 00 00 00      00 00 23 45

To Clear the Laser Hour
Press the [  DISPLAY] button on the remote commander and then 
press the [CLEAR] button on the remote commander. The data for 
both CD and DVD data are reset.

 

Emg. History Check

Laser Hours     CD      0h   0min
                DVD     0h   0min

01. 01 05 04 04      00 92 46 00
    00 00 00 00      00 00 23 45

02. 02 02 01 01      00 A9 4B 00
    00 00 00 00      00 00 23 45

[Next]Next page [Prev]Prev page
[0]Return to Top Menu

To Clear the Emergency History
Press the [DVD TOP MENU] button on the remote commander 
and then press the [CLEAR] button on the remote commander. The 
error code for all emergency history would be reset.

 

Emg. History Check

Laser Hours     CD    999h  59min
                DVD   999h  59min

01. 00 00 00 00      00 00 00 00
    00 00 00 00      00 00 00 00

02. 00 00 00 00      00 00 00 00
    00 00 00 00      00 00 00 00

[Next]Next page [Prev]Prev page
[0]Return to Top Menu

To Execute the Initialize Setup Data
Procedure:
1.  Press the [DVD MENU] button on the remote commander and 

then press the [CLEAR] button on the remote commander. The 
following screen appears on the on-screen display.

Emg. History Check

Laser Hours     CD    999h  59min
                DVD   999h  59min

Initialize setup data...

[Next]Next page [Prev]Prev page
[0]Return to Top Menu

2.  The screen after a while returns to former display.

To Return to the Top Menu of  Remocon Diagnosis Menu
Press the [0] button on the remote commander.

5.  CHECKING  VERSION  INFORMATION
To check the version information, please follow the following pro-
cedure.
Procedure:
1.   From the top menu of  Remocon Diagnosis Menu, select “4. 

Version Information” by pressing the [4] button on the remote 
commander. The following screen appears on the on-screen 
display.

 

Version information

Firm(Main): Ver. X.XXXX
Firm(Sub): XX.XX
RISC: XXXXXX
8032: XXXXXX
Audio DSP: XX.XX.XX.XX
Servo DSP: XX.XX.XX.XX

[0]Return to Top Menu

2.  To return to the top menu of Remocon Diagnosis Menu, press 

the [0] on the remote commander.

When the base unit is replaced, perform the adjustment and the 
measurement as shown below in this order.

EXECUTING IOP MEASUREMENT (See page 21)

Procedure:
1.  Turn on the set.
2.  Input the following signal from signal generator to FM antenna 

input directly.

Carrier frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz

Deviation :  75  kHz
Modulation  : 1 kHz
ANT input   : 35 dBu (EMF)

Note:  Use 75 ohm coaxial cable to connect signal generator and the set. 

You cannot use video cable for checking.

 

Use signal generator whose output impedance is 75 ohm.

3.  Set to FM tuner function and tune A, B and C signals.
4. Confi rm “TUNED” is lit on the display for A, B and C sig-

nals.

When the selected station signal is received in good condition, 
“TUNED” is displayed.