SRF-M97 - Sony Audio Service Manual (repair manual). Page 2

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2-1.

Disassembly Flow ...........................................................

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2-2.

MAIN Board, Cabinet (Front) Assy ................................

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2-3.

Side Panel Section, Cabinet (Rear) Assy .........................

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2-4.

AMP Board ......................................................................

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4-1.

Schematic Diagram .........................................................

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4-2.

Printed Wiring Board – MAIN Board – .......................... 10

4-3.

Printed Wiring Board – AMP Board – ............................ 11

5-1.

Cabinet (Front) Section ................................................... 14

5-2.

Cabinet (Rear) Section .................................................... 15

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• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

• 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.

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 viscou-s (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.