DSC-H400 - Sony Digital Camera Service Manual (repair manual). Page 2

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DSC-H400

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH 
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS 
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE 
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS 
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS 
PUBLISHED BY SONY. 

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES 
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT 
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE 
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY 
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU 
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
Dispose of used batteries according to the instructions.

This unit uses 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.)

Be careful to the following points to solder or unsolder.

•   Set the soldering iron tip temperature to 350 °C approximately. 

If cannot control temperature, solder/unsolder at high temperature 
for a short time.
Caution:  The printed pattern (copper foil) may peel away if the 

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

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

•   Be sure to control soldering iron tips used for unleaded solder and 

those for leaded solder so they are managed separately. Mixing un-
leaded solder and leaded solder will cause detachment phenomenon.

After correcting the original service problem, perform the following 

safety checks before releasing the set to the customer.

1.  Check the area of your repair for unsoldered or poorly-soldered 

connections. Check the entire board surface for solder splashes 
and bridges.

2.  Check the interboard wiring to ensure that no wires are “pinched” 

or contact high-wattage resistors.

3.  Look for unauthorized replacement parts, particularly transistors, 

that were installed during a previous repair. Point them out to the 
customer and recommend their replacement.

4.  Look for parts which, through functioning, show obvious signs 

of deterioration. Point them out to the customer and recommend 
their replacement.

5.  Check the B+ voltage to see it is at the values specified.
6.  Flexible Circuit Board Repairing
 

•   Set the soldering iron tip temperature to 350 °C approximately.

 

•   Do not touch the soldering iron on the same conductor of the 

circuit board (within 3 times).

 

•   Be careful not to apply force on the conductor when soldering 

or unsoldering.

注意

如果电池更换不当会有爆炸危险。
只能用同样类型或等效类型的电池来更换。
务必按照说明处置用完的电池。