Panasonic JU-455-5 Service Manual page 5

16. SCHEMATIC DIAGRAM [JU -455 - 5 AAG
cv>]
VR 20K
+SV DC
~r---
..........
+ SV RETURN ~~-..:.;..:..o~~--IV\/I,.....,
+
12 V RETURN
-.r..<-=--41
+ I 2V DC
-.L.----'
-WRITE DATA
~....._
_ _ _ _ _ _...
+sv-..,,,c=32---....i.
- DRIVE SELECT I
*"",..---+t...+_...,
O. IJJ;J;
}
i~~n--...-=----------
LSl4
'--+-+--,-("
in
10
-HEAD LOAD ~---±---...J
IC2 TPl2
-MOTOR ON
~---=l~---.+-+-----4---~1
-STEP
~----l
........
---~-------------+------=~
-WRITE
GATE
*"""'-------'~_,_---+-----------1-..._---:IUlo.4
DIRECTION SELECT
*'""'----.~_,_-+-.....+-----------1-..._---:11K.1
- SIDE SELECT *"""--"11r-11:::-+.:+-+.-+.:-+....-----------1--1----=i=i
TRACK 9HiJ
SW
TPS
R4
ISO l/4W
.----------+--+----'=o1+TRKZERO
r-i-+-~ -
IDX
CXI
R31 47K
C28
,to.1µ
IC3
FQLOOOS
-4-
+12V
R6
680 l/2W
DI
MAl62
TP6
TP7
R/W HEAD
SIDE !iJ
R/W HEAD
SIDE I
IN USE LED
'-"~'-]
IJ.O.
MOTOR
"--+-----~-READ
DATA
STEP
MOTOR
fo-1----...._---------------~!.¥-
-IN-OEX
t---------------------...ali~-TRACK00
1----------------------~~
-WRITE PROTECT