DPF-A72 - Sony Other Service Manuals Service Manual (repair manual). Page 2

DPF-A72

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

dered 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 transis-

tors, 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 recom-
mend their replacement.

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

• Keep the temperature of the soldering iron around 270˚C dur-

ing repairing.

• 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 solder-

ing or unsoldering.

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 flow) 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.

After correcting the original service problem, perform the following

safety checks before releasing the set to the customer.

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The Sony DPF-A72 is a digital photo frame for easily displaying
images taken with a digital camera or other device without using a
computer.
x

Supports various memory cards, such as a “Memory Stick”,
SD memory card, and xD-Picture Card. Just insert a memory
card removed from a digital camera or other device, and you
will be able to view the images immediately.

x

You can enjoy various viewing modes, such as the slideshow
display, Clock and calendar display, Single view mode, and
Index image display.

x

The displayed image can be switched automatically as though
you are turning the pages of an album yourself. You can select
from various modes, including just images, a clock, or calen-
dar view. You can also change playback settings such as the
playback order.

x

The images you add to the album are saved in internal memory.

x

You can export images in the album to your memory card.

x

The photo frame automatically rotates images to their proper
orientation. Images are also automatically rotated when the
photo frame is set in either the portrait or landscape position.

x

You can hang the photo frame on the wall.