Radio Shack TRS-80 Service Manual page 52

5-Meg Hard Disk
®
Service Manual
50
V/DIV
5]Usec/DIV
Input
-
120V
AC
Loads
- +5@2A
+12@ 1A
-12@0.1A
Figure
9*
Q2
Collector Waveform
J
%
^^#
8
#f
SM^
y
(
1.0
V/DIV
5jUsec/DIV
Input
and Loads
same
as
above.
Figure
10
»
Q2
Base
Waveform
Section
IV
Performance Test
Each
of
these test conditions should
be
set-up and noted
to
be
within the limits
„
Test Input
+5 Load +12 Load -12 Load
1
95VAC Max Max Max
2
128V
AC Max Max Max
3
120V
AC Max
Min
Min
4
128VAC Min Min Min
5
95VAC
Min
Min Min
VOLTAGE
AND
RIPPLE SPECIFICATION
OUTPUT MIN
MAX
NO LOAD
RIPPLE
+5
4
75V
5
25V 50mV
P-P
+12
11
40V
12
60V 150mV
P-P
-12
11
00V
15,00V
150mV
P-P
Applies to
resistive
load only.
Not under system
operating
conditions.
-
50