AIWA XRM35
Manual de Servicio

In such

a case,

check

rdso 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 to wrong the MICROCOMPUTER key + POWER key) is not reset is performed. is defective and check good and to or no even though the AC

are cases cord

is re-inserted, described

or the software phenomenon

the above

it can leads perform

judgment

as if the MICROCOMPUTER by the following procedure

exchange good @)

the MICROCOMPUTER.

a case,

the forced-reset

of the MICROCOMPUTER. Remove the AC power cord.

FRONT

C.B

~@vss

*�

15~\

MICRO�-�TTJTER

\
FRONT

o

C.B d

Short

with

tweezers.

Fig-2-2

@ @

Short Connect

the both

ends

of the electrolytic cord again.

capacitor

Cl 13 that

is connected returns

to VDD

of the MICROCOMPUTER operation,

with

tweezers.

the AC power

If the MICROCOMPUTER

to the normal

the MICROCOMPUTER

is good.

Note:

The reference depending

number

or MICROCOMPUTER Be sure to check

pin number the reference

of transistor numbers

(Ql

10) and electrolytic diagram before

capacitor starting

(Cl 13) can change the discharging work.

on the models.

on schematic

2-3.

Confirmation
Check

of soldering
state after

state

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

the soldering

of the MICROCOMPUTER surely confirming that

MICROCOMPUTER itself.

is not caused

by poor

soldering

but the MICROCOMPUTER

TRANSISTOR

ILLUSTRATION

ECB

ffhiibf
ECB

B

BCE

2SA933S 2SC5395

2SA952 2SC1815 2SD655 C2N5551 CSBI CSD655 CSD1489 KTAI 266 058

2SAI

235

DTCI DTCI

14TK 44EK

2SB1481 2SD2241

2SK2158

2SC2714 2SC3052 CMBT5401 CMBT5551 DTA143EK DTA144TK

KTA1 298 RT1 N144C RT1 P141C RTI RTI P144C P441 C

KTC3198
6