HCD-WZ8D, MHC-WZ8D - Sony Audio Service Manual (repair manual). Page 15

15

The Test Mode allows you to make diagnosis and adjustment easily
using the remote commander and monitor TV. The instructions,
diagnostic results, etc. are given on the on-screen display (OSD).

1.

Press the  

+/1

  button to turn the power on, and set the function

to DVD.

2.

While pressing the

x

and  

Z

  button, turn the 

[VOLUME]

knob clockwise to enter the test mode.

3.

It displays “SERVICE IN” on the liquid crystal display, and
displays the Test Mode Menu on the monitor screen as follows.
(At the bottom of the menu screen, the model name and revision
number are displayed)

Test Mode Menu

0. Syscon Diagnosis

1. Drive Auto Adjustment

2. Drive Manual Operation

3. Mecha Aging

4. Emergency History

5. Mecha Error History

6. Version Information

7. Video Level Adjustment

Exit: POWER Key

Model    :MHC-WZ8D_6D xx

Revision :x.xx

4.

To execute each function, select the desired menu and press its
number on the remote commander [COMMAND MODE]
(RM-SWZ8D).

5.

To release from test mode, press the  

+/1

  button and turn the

power off.

The same contents as board detail check by serial interface can be
checked from the remote commander operation.
On the Test Mode Menu screen, press 

[10/0]

  key on the remote

commander, and the following Check Menu will be displayed.

### Syscon Diagnosis ###

Check Menu

0. Quit

1. All

2. Version

3. EEPROM

4. GPIO

5. SD Bus

6. Video

0-0.  Quit
Quit the Syscon Diagnosis and return to the Test Mode Menu.

0-1.  All (All items continuous check)
This menu checks all diagnostic items continuously. Normally, all
items are checked successively one after another automatically
unless an error is found, but at a certain item that requires judgment
through a visual check to the result, the following screen is displayed
for the key entry.

• VACS Level Display Mode
Procedure:
1. Press three buttons  x      ,    z  START  (REC PAUSE) and

TUNER/BAND  simultaneously.

2. Press the  X  button. The VACS level "VACS 0+0" is displayed.
3. To exit from this mode, press three buttons in the same manner

as step 1, or disconnect the power cord.

• Display Check
Procedure:
1. Press three buttons  x   ,  z  START  (REC PAUSE) and

TUNER/BAND  simultaneously.

2. Press the  x  button and the display changes. Each time the  x

button is pressed, the pattern of segments changes.

3. To exit from this mode, press three buttons in the same manner

as step 1, or disconnect the power cord.

• This mode is used to switch on and off the VACS (Variable

Attenuation Control System).

Procedure:
1. Press the  ?/1  button to turn the set on.
2. To enter the test mode, press three buttons  x  ,  z  START

(REC PAUSE) and  MOVIE MODE  simultaneously.

3. The message "VACS OFF" or "VACS ON" appears.

Use the following test disc on test mode.
TDV-520CSO (DVD-SL): PART No. J-2501-236-A
LUV-P01 (CD):

PART No. 4-999-032-01

TDV-540C (DVD-DL):

PART No. J-2501-235-A

Note: Do not use exiting test disc for DVD.