Panasonic JB-3300 Technical Manual page 83

[10] Local Speaker Section
No Beep or
Unusual Beep
SPKOUT Yes .
Signal OK? @-iReplace Speaker Unit
X:4E-3
SPKFRQ
Signal OK?
SPKDATA Yes . . .
Signal OK? Speaker Drive Circuit
X:4E~1 II. 5.10 (c)
No
C
Sionat on?
Yes
i
ge-i PITC 8253-5
gn X: 4F-16
II 5.11
No
cc
| ee) PPI 8255-5
II. 5.10 (c)
Figure 9-19