Zenith ZVM-133-TC Service Manual page 40

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Figure 4-11
Main Board Component Location
r-
Connec'tor D, Pin 2
Vertical Sync
eRGS
input)
r-
ll.!:g
Ref. DC
O.5V/DIV.
2Msec/DrV.
®
W-'I-~=*~*$~~~t-
Zero
Ref. DC
O.2VIDIV.
Connector 0, Pin 3
Horizontal Sync
(RGB input)
fOllsecrDIV.
If'
f+.1,f-+-j.....o~.....,-HI-r-+-+-
Zero
\!::I
Ref. DC
j
~J
A
®
,
,
Connector E, Pin 6
RED Signal
(RGB input)
l,
Connector 303. Pin 4
APl Signal
"
1~
1 \
Connector 3D3, Pin 5
60VPP
2V
rDlv.
10Ilsec/DIV.
Zero
Ref. DC
2VIDIV,
fOllsecfDIV.
Z'ero
Ref. DC
2V/DIV.
1 Ousec/DIV.
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Figure 4-12
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if'
~
j
1-
10
I' " '
I
,A
j
P--
W
:'rI'
"' "
Connector 3G3. Pin 2
Base Drive
-
Connector 3G3" Pin 5
Video Output
-
I-k-
YH
i~
~
I
rJ
r'-=
!--
1
~ -f
~ ~
I,
Connector 2A5. Pin 4
RED Signar
('AGB signar>
~ I
\,
(-
Connector 303, Pin 1
170 vorts peak to peak
h
\
~~
I \
Connector 303, prn 6
140 volts peak to peak
-j
~
Main Board Waveforms
Page 4-22
Zero
Ref. DC
!l.fVrDIV.
rOusec/DIV.
ilL!!
Ref. DC
20V rDIV.
2msecrDIV.
Zero
Ref. DC
2V IDIV.
10J{secrDIV
Z-ero
Ref. DC
50V/DIV,
10Ilsec/DIV.
Zero
Ref. DC
50V/DIV.
1 Ouse'cfDIV,
Servicing