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F
>--i---===r-=---~
+12VDC
12VDC
C120
C122
OC~2
39
Cl0l
...
Y101
C125
R223
+5VDC
Figure 4-23
E
C123
~
~
~
Logic Board Component Location
g
..
AOSl 'l;fSLC'O
WLX.::I
R2'1'1
c
BE
""R21"4"
C27aQ~~~3 Irri5
C B E
+
~(
)
R'2'i'7'
co
Ci:1::~:_E R::~1~
_
R222
7
C212
IC201 1
C2~
I
(
I~(
)
B
"
~1~lg
(\
CO
01
"
(EARLY VERSION
LOGIC CARDS)
®
20VIDIV.
zero'\
Ref.DC
®
2V/DIV.
Zero
Ref.DC
ZERO
REF. DC
2V/DIV.
0.1 MS/DIV
®
5V/DIV.
Zero
Ref.DC
®
2V/DIV.
Zero
Ref.DC
j
1
I
~
-
-----
l-
t
. -
j ;
t
- '
1111~1111~111".,~~t~
-
-
-
I
.~"'
'r;
I
.
' - '
f'
hr
~~mt-
1IIIli'I~11
t---
,
, .
- "
I
'I,
'II
-t
I
I'
t-~t--
2MS/DIY.
®TP1 @U01
i
I
-
i
©
TEST POINT 2 (TP2)
r
t-
-t-
1
O~S/
DIV.
@Pln39
of
IC101
®pin2
of
8E2
I
®
20V IDIV.
Zero
Ref.DC
®
2V/DIV.
Zero
Ref.DC
@
20V/DIV.
Zero
Ref.DC
OV/DIV.
®
_Lera
Ref.DC
I
®
®
!
!
r--- 1--
1-
\
I
1
I
'.
I,
I
2MS/DIV.
Junction of
R101. R106.
and
pin 9 of
IC201
L101
,
i -
I
,
'r-
2MS/DIY.
@L101
NOTE: J9 PIN 2 WAS USED FOR GROUND REFERENCE FOR ALL WAVEFORM REPRESENTATIONS.
Figure 4-24
Logic Board Waveforms
Page 4-28
Servicing
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