Sharp R-8320E

No
l Defective Dl, D2
0 Poor R40 soldering
Yes
No
l Defective Q40‘
applied to Q41 base?
II- l Poor soldering of R42,
R45, R46 and R48
Yes
1
No
l Defective 041
applied
to Q42 base?
> l Poor soldering of R43
and R47
t
Yes
w
l Defective Q42
l Poor R44 soldering
2.
ALL KEYS FAIL TO
TRANSMIT INPUT
&
No
3 Correct soldering.
No
Yes
w
No
l
Defective
l Connector (H)
0 2-pin wire connector
l stop switch
90