HDR-CX620, HDR-CX670, HDR-PJ620, HDR-PJ670 - Sony Movie Service Manual (repair manual). Page 4

Be careful to the following points to solder or unsolder.

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.

0 OR DOTTED LINE WITH 

0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS 

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.)

•  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.

0 SUR LES 

HDR-CX620/HDR-CX670/HDR-PJ620/HDR-PJ670