Radio Shack TRS-80 III - Mini-Disk Drive Schematic (Sheet 2) 121 19 Servo Board Schematic 122 20 Mini-Disk Drive Schematic (New Board)

J2·30
N READ DATA
TP7
+5
TPl
3300pl R32
R22 On
50K
5.6)lh
L3
4
"1"
P6' • J1
N WRT
R51
"1"
RP1·4
AAA_
,
12
3
+12v
N WRITE
l:...':!2/-
J4
DATA
+10v
"1"
I
1
1
I
5 Jru'7"
768
WRT
4
R11
+5
I
+5
r ~
C1,11,12,2324
26,31,32,34' ,
GRD
l
R23
~OK
NOT USED
R
13,24,28, C4
LAST NO R56
C39
..
I\)
Co\)
FIGURE 20. MINI-DISK DRIVE SCHEMATIC OF NEW BOARD (SHEET 1)