NW-E10, NW-E7 - Sony Audio Service Manual (repair manual). Page 2

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Specifications ............................................................................... 1

....................................................... 3

.......................................................................... 9

3-1. Case ............................................................................... 11
3-2. Battery, Nickel Hydrogen ............................................. 12
3-3. Main Board ................................................................... 12

4-1. Block Diagrams ............................................................ 13
4-2. Printed Wiring Boards (Main Section) ......................... 14
4-3. Schematic Diagram (Main Section (1/2)) ..................... 15
4-4. Schematic Diagram (Main Section (2/2)) ..................... 16

5-1. Main Section ................................................................. 19
5-2. Case Section .................................................................. 20

....................................... 21

• Keep the temperature of the soldering iron around 270

°

C during

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 soldering or

unsoldering.

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

• Replacement of TMS320DA150GGU120 (IC601) used in the set requires

a special tool.

z

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.

z

Use ISO9660 Level 1 format.