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AV-2750S
AV-2760S
REPLACEMENT
OF CHIP COMPONENTS
@
CHIPS ARE NOT USED ON CERTAIN MODELS. REFER TO THE DESCRIPTIONS ON THIS PAGE ONLY WHEN
WORKING ON MODELS ON WHICH CHIPS ARE EMPLOYED.
Replacement of the chip on printed circuit board can be performed easily as follows.
1.
When
mounted
[Resistor - Capacitor]
Pattern
Board
—>»
Adhesive
Vent hole
2
Removal of the chip
(1)
Remove either of the soldered
(2)
Hold the chip with
(3)
Work the chip free from
contacts.
tweezers and remove
the adhesive with tweezers.
the other contact.
— * Tweezers
a
'
a
3
Preheating and soldering of chip pieces
Be sure to preheat chip pieces (except the transistor) especially the
capacitor before soldering with hot air, about 150°C (hair dryer or
such can be used) for about 2 minutes. Then, immediately solder
with an iron of about 30W.
4
Replacing the chip pieces
(1) Apply the solder to the
(2) Hold the chip with
board first.
tweezers and solder it
in place, hold the iron
at a 45° angle when
soldering.
@
Discrete parts can be substitutionally mounted as shown
a"
in the figure on the right.
Mounting is also possible by passing the wires from the
board front side (parts side) through the chip soldering
hole (vent hole of registration part).
Substitute parts are as follows.
e Chip Metal Glaze Resistor
—Carbon Resistor
14W
+5%
@ Chip Ceramic Capacitor
— Ceramic Capacitor
50V
+5%
(No.50360) 19
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