MEX-DV1100, MEX-DV2100 - Sony Car Audio Service Manual (repair manual). Page 4

The laser diode in the optical pick-up block may suffer electrostat-
ic 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.

NOTE  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 tha optical 
pick-up block. Therefore, when checking the laser diode emission, 
observe from more than 30 cm away from the objective lens.

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.

Label indication

 Signal format  Region 

Part No.

 Destination

system code 

 PAL 

3 

3-276-503-0[]  DV1100: E model

 PAL 

5 

3-276-504-0[]  DV1100: Indian model

 PAL 

5 

3-276-506-0[]  DV1100: Russian model

 PAL 

3 

3-276-509-0[]  DV2100: E model

 PAL 

5 

3-276-510-0[]  DV2100: Indian model

 PAL 

5 

3-276-512-0[]  DV2100: Russian model

ABOUT  THE  SERVO  BOARD  E,  F  SIGNAL  OFFSET  
ADJUSTMENT  CIRCUIT  DELETION
In this set, E, F SIGNAL OFFSET ADJUSTMENT circuit on the 
SERVO board is deleted in the midway of production.
The SERVO board from which the E, F SIGNAL OFFSET AD-
JUSTMENT circuit has been deleted should not execute the E, F 
SIGNAL OFFSET ADJUSTMENT. 

Parts concerning this change are expressed as follows.

TYPE A: There is E, F SIGNAL OFFSET ADJUSTMENT CIR-

CUIT

TYPE B: There is no E, F SIGNAL OFFSET ADJUSTMENT 

CIRCUIT

•  The set since the following serial No. is the set from which the 

circuit is deleted.

MEX-DV1100

E (PAL)

since 1501902

Russian

since 1509667

Indian

since 1505187

Indian (Muruti Suzuki)

ALL

MEX-DV2100

E (PAL)

since 1502223

Russian

since 1502291

Indian

since 1501723

NOTE  THE  IC501  ON  THE  MAIN  BOARD  REPLACING  
(MEX-DV2100  ONLY)
When the IC501 on the MAIN board of MEX-DV2100 is replaced, 
it is necessary to update it.
Confi rm the update method to each service headquarters.