HCD-MX700NI, HCD-MX750NI - Sony Audio Service Manual (repair manual). Page 4

UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution:  Some printed circuit boards may not come printed with 

the lead free mark due to their particular size)

Unleaded solder has the following characteristics.
•  Unleaded solder melts at a temperature about 40 °C higher 

than ordinary solder.

 

Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.

 

Soldering irons using a temperature regulator should be set to 
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if 

the heated tip is applied for too long, so be careful!

• Strong 

viscosity

 

Unleaded solder is more viscous (sticky, less prone to fl ow) 
than ordinary solder so use caution not to let solder bridges 
occur such as on IC pins, etc.

•  Usable with ordinary solder
 

It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.

The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated by 
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also 
use the procedure in the printed matter which is included in the 
repair parts.
The fl exible board is easily damaged and should be handled with 
care.

NOTES  ON  LASER  DIODE  EMISSION  CHECK
The laser beam on this model is concentrated so as to be focused 
on the disc refl ective surface by the objective lens in the optical 
pickup block. Therefore, when checking the laser diode emission, 
observe from more than 30 cm away from the objective lens.

NOTE  OF  REPLACING  THE  WIRELESS  LAN  MODULE 
(MOD1)
When replacing the wireless LAN module (MOD1), MAC address 
is changed. Print the following explanation, cut it, and hand over it 
to the customer with the set, when returning the set that the repair 
is completed to the customer.

MAC address of the main unit has been changed by this repair.
When using the MAC address fi ltering function of connection destina-
tion access point equipment, set it again..

CHECKING  METHOD  OF  NETWORK  OPERATION
It is necessary to check the network operation, when replacing the 
wireless LAN module (MOD1). Check the operation of wireless 
and wired LAN, according to the following method.

1.  Checking Method of Wireless LAN Operation
Check that access point is recognized surely.

Necessary Equipment:
Wireless access point with router function (AP)

Procedure:
1.  Press the [FUNCTION] button to select the Home Network 

function.

2. Press the [  + 

v

]/[

V

   –] buttons to select “Network,” then 

press the [ENTER] button.

3.  Press the [  + 

v

]/[

V

 

 –] buttons to select “Settings,” then 

press the [ENTER] button.

4. Press the [  + 

v

]/[

V

 

 –] buttons to select “Wireless LAN 

Settings,” then press the [ENTER] button.

5.  Press the [  + 

v

]/[

V

 

 –] buttons to select “Access Point 

Scan,,” then press the [ENTER] button.

6.  The system starts searching for access points, and displays a 

list of up to 20 available network name (SSID).

7.  Check that access point (SSID) is displayed on the searching 

result.

Note: Refer to the instruction manual about details of the setting method.

2.  Checking method of wired LAN operation
Check that access point is recognized surely.

Procedure:
1.  Connect the main unit to the router or the hub, etc. with the 

LAN cable.

2.  Press the [FUNCTION] button to select the Home Network 

function.

3. Press the [  + 

v

]/[

V

   –] buttons to select “Network,” then 

press the [ENTER] button.

4.  Press the [  + 

v

]/[

V

 

 –] buttons to select “Settings,” then 

press the [ENTER] button.

5. Press 

the 

[  + 

v

]/[

V

   –] buttons to select “Wired LAN Set-

tings,” then press the [ENTER] button.

Note: If “Change Setting?” appears, select “OK,” then press the [ENTER] 

button.

6.  On the IP setting, press the [  + 

v

]/[

V

   –] buttons to select 

“Auto,” then press the [ENTER] button.

7.  On the proxy setting, press the [  + 

v

]/[

V

 

 –] buttons to 

select “Do Not Use,” then press the [ENTER] button.

8. Press 

the 

[  + 

v

]/[

V

   –] buttons to select “OK,” then press 

the [ENTER] button.

9.  Perform the server settings.
10. Press the [OPTIONS] buttons to select “Network,” then press 

the [ENTER] button.

11. Press the [OPTIONS] buttons to select “Information,” then 

press the [ENTER] button.

12. Check that IP address can be acquired.

Note: Refer to the instruction manual about details of the setting method.

RELEASING  THE  DISC  TRAY  LOCK
The disc tray lock function for the antitheft of an demonstration 
disc in the store is equipped.

Releasing Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press two buttons of [

x

] and [

Z

] for 5 seconds.

3.  The message “UNLOCKED” is displayed on the liquid crystal 

element and the disc tray is unlocked.

Note: When “LOCKED”is displayed, the disc tray lock is not released by 

turning power on/off with the [

?/1] button.

NOTE  OF  REPLACING  THE  MS-203  BOARD
When the MS-203 board is damaged, exchange the entire 
CDM85 (CD) ASSY.

NOTE  OF  REPLACING  THE  CN1003  ON  THE  NET  
BOARD
CN1003 on the NET board cannot exchange with single. When 
these parts are damaged, exchange the entire mounted board.