HCD-DP900D - Sony Audio Service Manual (repair manual). Page 2

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

Press the  ?/1  button to turn the set ON, and set the function to
DVD. Press the Z 1  button to insert the DVD disc, and wait for
TOC reading is finish. Next, while pushing the x button and the
[ENTER] and [DISC 1] button on the main unit at the same time,
turn the regulator to the right to start Test Mode and display the
menu shown below on the TV screen. At the bottom of the menu
screen, the model name and revision number are displayed.
To  execute each function, select the desired menu and press its
number on the remote commander. To exit from Test Mode, press
the  ?/1  button.

Note: In the Test Mode, use the remote commander (RM-SD170)

(Part No.: 1-418-911-11).

Test Mode Menu

0. Syscon Diagnosis
1. Drive Auto Adjustment
2. Drive Manual Operation
3. Mecha Aging
4. Emergency History
5. Version Information
6. Video Level Adjustment

Exit: Power Key

_
Model

: HCX-984_xxxx

Revision: 1.xxx

The same contents as board detail check by serial interface can be
checked from the remote commander.
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. Peripheral
4. Servo
5. Supply
6. AV Decoder
7. Video
8. Audio
_

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

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 judg-
ment through a visual check to the result, the following screen is
displayed for the key entry.

### Syscon Diagnosis ###

Diag All Check

No. 2 Version

 2-3. ROM Check Sum
Check Sum = 2005

Press NEXT Key to Continue
Press PREV Key to Repeat
_

For the ROM Check, the check sum calculated by the Syscon is
output, and therefore you must compare it with the specified value
for confirmation.
Following the message, press 

[NEXT]

 key to go to the next item,

or 

[PREV]

 key to repeat the same check again. To quit the diagno-

sis and return to the Check Menu screen, press the x or

[ENTER]

  key. If an error occurred, the diagnosis is suspended

and the error code is displayed as shown below.

### Syscon Diagnosis ###

 3-3. EEPROM Check
Error 03: EEPROM Write/Reed N
Address

: 00000001

Write Data : 2492
Read Data : 2490
Press NEXT Key to Continue
Press PREV Key to Repeat
_

Press the x key to quit the diagnosis, or 

[PREV]

 key to repeat

the same item where an error occurred, or 

[NEXT]

 key to continue

the check from the item next to faulty item.

Selecting 2 and subsequent items calls the submenu screen of each
item.
For example, if “5. Supply” is selected, the following submenu
will be displayed.

### Syscon Diagnosis ###

Check Menu

No. 5 Supply

0. Quit
1. All
2. ARP Register Check
3. ARP to RAM Data Bus
4. ARP to RAM Address Bus
5. ARP RAM Check
_

Quit the submenu and return to the Check Menu.

All submenu items continuous check
This menu checks 2 and subsequent items successively. At the item
where visual check is required for judgment or an error occurred,
the checking is suspended and the message is output for key entry.
Normally, all items are checked successively one after another au-
tomatically unless an error is found.