Panasonic JB-3300 Technical Manual page 78

Is
SYNC Signal
OK?
Yes
Is
CNTL Level
OK?
Yes
Are
RDATA,
QVINDOW Signals
OK?
Yes
Are
*STEP,
*DIP Signals
OK?
Yes
Is
*WRITE
ATE Signal | .
OK? |
Yes
Is
*WRITE
DATA Signal
OK?
Yes
No ew-| Replace FDD Unit
"RDDATA"
No e| FDC (uPD765AC)
"SYNC"
No
"CNTL" | |
CNTL
| | 2.4 Vv
OT
CNTL
VFO (SED9420C)
we Circuit
Y:9G-23
Y:9G-24
Il.
5.10 (e)
No
Y¥:11C-2
wet FDC (UPD765AC)
Y¥:5F-2
Y:12D-3
Il.
5.10 (e)
No FDC (uPD765AC)
we} Pre-Compe. Circuit
Y:12D-11
II.
5.10 (e)
w-| Replace FDD Unit
Figure 9-16 (2/2)