STR-DA2400ES, STR-DG920 - Sony Audio Service Manual (repair manual). Page 5

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.

NOTE  OF  REPLACING  THE  IC3601  ON  THE  DIGITAL  
VIDEO  BOARD
Replacement of IC3601 on the DIGITAL VIDEO board used in 
this set requires a special tool.

NOTE  OF  REPLACING  THE  IC3506  AND  IC3508  ON  
THE  DIGITAL  VIDEO  BOARD
IC3506 and IC3508 on the DIGITAL VIDEO board cannot ex-
change with single. When IC3506 and IC3508 on the DIGITAL 
VIDEO board are damaged, exchange the entire mounted board.

NOTE  OF  REPLACING  THE  IC5021  ON  THE  DSP  
BOARD
IC5021 on the DSP board cannot exchange with single. When 
IC5021 on the DSP board is damaged, exchange the entire mount-
ed board.

NOTE  OF  REPLACING  THE  IC8018  ON  THE  MICON 
BOARD
IC8018 on the MICON board cannot exchange with single. When 
IC8018 on the MICON board is damaged, exchange the entire 
mounted board.

DG920: US model

3-286-648-0[]

DG920: Canadian model

3-286-648-1[]

DA2400ES: US model

3-286-662-0[]

DA2400ES: AEP and UK models

3-286-662-1[]

DA2400ES:  Continental European, 

East European and 
Russian models

3-286-662-7[]

DA2400ES: Taiwan model

3-286-662-8[]

DA2400ES: Canadian model

3-286-662-9[]

DA2400ES: Brazilian model

4-144-755-3[]