Sony SVBK-170P Servicehandleiding - Pagina 4

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2-1.

SECTION 2

SERVICE OVERVIEW

NOTES ON SPARE PARTS

2-1-1.

Notes on Spare Parts

Standardization of Parts

Spare parts supplies form Sony Parts Center may not be

always identical with the parts which actually in use due

to "accommodating

the

improved

parts

and/or

engineering changes" or "standardization of genuine

parts".

This manual's exploded views and electrical spare parts

list are indicating the part numbers of "the standardized

genuine parts at present."

Stock of Parts

Parts marked with "o" in SP (Supply code) column of the

spare parts list are not normally required for routine

service work. Orders for parts marked with "o" will be

processed, but allow for additional delivery time.

Units for Capacitors, Inductors and Resistors

The following units are assumed in schematic diagrams,

electrical parts list and exploded views unless otherwise

specified:

Capacitors

: uF in schematic diagram

: F of pF in schematic diagram

Resistors

: Q

2-1-2.

Replacement Procedure for Chip Parts

Required Tools

Soldering iron : 20 W

If possible, use a soldering iron tip heat-

controller at 270 + 10°C.

Braided wire

: SOLDER TAUL or equivalent

Sony part No. 7-641-300-81

Solder

: 0.6 mm dia. is recommended.

Tweezers

Soldering Conditions

Soldering iron temperature : 270 + 10°C.

Soldering time: less than two seconds per a pin.

CAPACITOR

RESISTOR

TRANSISTOR

DIODE

<S"

Terminal

e Resistor and Capacitor Replacement

Place the soldering iron tip onto the chin part and heat it

up until the solder is melted. When the solder is melted,

slide the chip part aside.

Make sure that there is no pattern peeling, damage and /

or bridges around the desoldering positions.

After removing the chip part, presolder the area, in which

the new chip part is to be placed, with a thin layer of

solder.

Place new chip part in the desired position and solder

both ends.

Once a chip part has been removed never use it again.

2-1