MEX-1HD - Sony Car Audio Service Manual (repair manual). Page 21

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The test mode of this set contains the items not used for the
service. If you activated another mode by mistake, press the func-
tion button 1 or the 

[M]

 (Menu) button to deactivate that mode.

Particularly, for the menu commands and Factory Setting saved
in the HDD menu, never execute them except when the hard
disk drive was replaced. Otherwise, the hard disk drive will not
operate or the data saved by the user in the hard disk will be
erased.

1. In the standby state, perform the following operation.

(1) Rotate clockwise the right jog dial (PUSH LIST) 4 clicks.
(2) Press the left jog button (PUSH SOUND).
(3) Rotate counterclockwise the right jog dial (PUSH LIST) 5

clicks.

(4) Press the left jog button (PUSH SOUND).
(5) Rotate clockwise the right jog dial (PUSH LIST) 1 click.
(6) Press the left jog button (PUSH SOUND) for more than 2

seconds.

2. When the test mode is activated, a peep will be heard and the

“TEST MODE” will be displayed on the screen. (“TEST
MODE” disappears soon)

3. Press the 

[M]

  (Menu) button, and the test mode main menu

screen will be displayed.

To release the test mode, perform either of the following opera-
tions.
• Turn the main power off.
• Remove the front panel.
• Press the 

[OFF]

 button for more than 2 seconds.

In exiting the test mode, the system is reset automatically and the
data are erased. Then, when the power is turned on again, the ini-
tial setting (AM 9K/10K step choice, date and time setting) screen
is displayed, but this setting is also erased in certain time after the
main power was turned off.
Accordingly, re-setting is not necessary but normal operation and
the test mode operation are disabled unless the initial setting has
completed. In such a case, therefore, press the right jog button
(PUSH LIST) repeatedly and enter tentative initial set values.

In the test mode, basically the following dial and buttons are used
for the operation.
• Right jog dial (PUSH LIST)

: Selects an item.

• Right jog button (PUSH LIST) : Enters the selected item.
• Function button 1

: Returns to the one-level high-

er menu

Procedure:
1. Select the “Test Mode” from the test mode main menu by ro-

tating the right jog dial (PUSH LIST), and press the right jog
button (PUSH LIST) to enter the Test Mode.

2. Rotate the right jog dial (PUSH LIST) to select the “DIAG”,

and press the right jog button (PUSH LIST) to enter the DIAG
mode.

3. With the “ALL -Auto-” selected, pressing the right jog button

(PUSH LIST) allows all of the following items to be checked
automatically.
• PEACOCK (MAIN board IC2003)
• HUMMING BIRD (MAIN board IC3003)
• ISP1161 (MAIN board IC4301)
• CXD1859 (MAIN board IC4001)
• E2PROM (MAIN board IC4002) *1
• ATA0 (HDD) (Hard disk drive) *2
•  ATA1 (CDD) (CD servo block)
• WM (USB connection) *3
• RTC (SUB board IC502)
*1) A checking without inserting a memory stick causes an

error, and the “E2PROM NO MS” is displayed.

*2) If the ATA0 (HDD) check results in NG, try to repeat the

check several times.
If repetitional check results in NG, a communication er-
ror is doubtful, besides faulty hard disk drive.

*3) A checking without connecting the USB causes an error,

and the “NWWM NG!” is displayed.

4. After automatic check of all items completed, if all items are

OK, “OK ALL” will be displayed. In case of erroneous items,
NG indication is given to respective erroneous items.

5. To return to the DIAG menu, press the left jog button (PUSH

SOUND).

Besides the version display for the users in normal mode, the ver-
sion of each section of the system is displayed.
Procedure:
1. Select the “Test Mode” from the test mode main menu by ro-

tating the right jog dial (PUSH LIST), and press the right jog
button (PUSH LIST) to enter the Test Mode.

2. Rotate the right jog dial (PUSH LIST) to select the “Version”,

and press the right jog button (PUSH LIST) to enter the Ver-
sion mode.

3. With the “Version” mode activated, pressing the right jog but-

ton (PUSH LIST) allows the following versions to be displayed:
• Main (version of main section)
• Sub (version of sub section)
• CD (version of CD servo section)

At the replacement of parts, this set may require jobs such as ver-
sion updating of the main section and sub section and data install-
ing to a HDD, and for these jobs, the CD-R for service is needed.
Make the CD-R for service by downloading the data from the “ftp”
server for service. The data to be downloaded are available with
two types, for initial lot type and for upgraded type, and further as
regards the upgraded type, the latest version at that time must be
confirmed, thus requiring extreme care. (See table “The version
of each section”  on page 22)

The file format should be ISSO9660.
Store all files in the ROOT directory.