Information for service about lead-free solder introduction
Hitachi introduced lead-free solder to conserve the "Earth Environment".
Please refer to the following before servicing.
(1) Characteristic of lead-free solder
Melting point of lead free solder is 40-50
o
C higher than solder containing lead.
(2) Solder for service
Following composition is recommended.
" Sn - 3.0Ag - 0.5Cu " , or " Sn - 0.7 Cu "
Lead solder can be used, but there is a possibility of failure due to insufficient strength of the solder.
Caution when using solder containing lead.
Please remove previous solder as much as possible from the soldering point.
When soldering, please perfectly melt the lead-free solder to mix well with the previous solder.
(3) Soldering iron for lead-free solder.
Melting point of lead-free solder is higher than solder containing lead.
Use of a soldering tool "with temperature control" and "with much thermal capacitance" is recommended.
(Recommended temperature control : 320
o
C - 450
o
C)
Recommended temperature
PWB with chip parts 320
o
C +/- 30
o
C
PWB without chip parts 380
o
C +/- 30
o
C
Chassis, metal, shield etc. 420
o
C +/- 30
o
C
(4) Identification of lead-free PWB
2004 models
>> lead-free solder is introduced
200
7
models >> lead-free solder apply
On lead-free PWB, "F" is added at the beginning of stamp on PWB. (e.g. DW
2-POD F
)
8
DW
3
U
Summary of Contents for P50H4011
Page 64: ...DW3U 63 FINAL WIRING DIAGRAM TABLE OF CONTENTS ...
Page 76: ...FINAL ASSEMBLY GUIDE TABLE OF CONTENTS 75 DW3U ...
Page 77: ...FINAL ASSEMBLY GUIDE 76 DW3U ...
Page 78: ...FINAL ASSEMBLY GUIDE 77 DW3U ...
Page 79: ...FINAL ASSEMBLY GUIDE 78 DW3U ...
Page 80: ...FINAL ASSEMBLY GUIDE 79 DW3U ...
Page 81: ...FINAL ASSEMBLY GUIDE 80 DW3U ...
Page 82: ...FINAL ASSEMBLY GUIDE 81 DW3U ...
Page 83: ...FINAL ASSEMBLY GUIDE 82 DW3U ...
Page 84: ...FINAL ASSEMBLY GUIDE 83 DW3U ...
Page 97: ...BACK TO TABLE OF CONTENTS 96 PRINTED CIRCUIT BOARDS DW3 U TERMINAL PWB Component side DW3 U ...
Page 98: ...PRINTED CIRCUIT BOARDS DW3 U TERMINAL PWB Solder side DW3 U 97 ...
Page 99: ...PRINTED CIRCUIT BOARDS DW3 U SD PWB Component side DW3 U 98 ...
Page 100: ...PRINTED CIRCUIT BOARDS DW3 U SD PWB Solder side DW3 U 99 ...
Page 102: ...PRINTED CIRCUIT BOARDS DW3 U FILTER PWB Component side DW3 U 101 Component side ...
Page 103: ...PRINTED CIRCUIT BOARDS DW3 U FILTER PWB Solder side DW3 U 102 Solder side ...
Page 123: ......