AIWA NSXA555
Service Manual

In such

a case,

check

also

if the POWER

AMPLIFIER

circuit

or power

supply

circuit

has any

abnormalities

or not.

2-2.

Regarding
There power When

reset
that the machine does not work reset occurs, In such correctly (pressing because the STOP the MICROCOMPUTER key + POWER judgement key) is not reset is performed. is defective and check good and or even though the AC

are cases cord

is re-inserted, described

or the software phenomenon

the above

it can leads a case,

to wrong

as if the MICROCOMPUTER by the following procedure

to exchange no good @

the MICROCOMPUTER.

perform

the forced-reset

of the MICROCOMPUTER. the AC power cord.

Remove

FRONT

C.B

m
.C113
Fig-2-2

@VDD

t 1:fyjs
MICROCOMPUTER

I

@ @

Short Connect

both

ends

of the electrolytic cord again.

capacitor

Cl 13 that

is connected

to VDD returns

of the MICROCOMPUTER operation,

with

tweezers.

the AC power

If the MICROCOMPUTER

to the normrd

the MICROCOMPUTER

is good.

Note:

The

reference

number

or MICROCOMPUTER Be sure to check

pin number the reference

of transistor numbers

(Q I 10) and electrolytic diagram before

capacitor starting

(Cl 13) can change the discharging work,

depending

on the models.

on schematic

2-3.

Confirmation
Check

of soldering
state after

state

of MICROCOMPUTER
in addition to the above described procedures. Be sure to exchange the

the soldering

of the MICROCOMPUTER surely confirming

MICROCOMPUTER itself.

that the trouble

is not caused

by poor

soldering

but the MICROCOMPUTER

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