Texas Instruments 990 Manual page 145

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945424-9701
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VERTICAL
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VERT.
D12 VIDEO DISPLAY 15.7KHz
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i--------------------------,
P.C. 801\RD EDGE CONNECTOR
KEY
CFOIL SIDEl
@000©®©®00
0
=
DC VOL Tl\GE SOJRCE
0
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DC VOL Tl\GE APPLIED
NOTE: I. CUSTOMER SUPPLIED EXTERNAL 0 C SOURCE ON
PIN 7 EDGE CONNECTOR
IMPORTANT:SAFETY NOTICE.
When aervlc1nG thl~ chassis, uncter no clreumstances sh~uld the orlgl-
rial
dellgn
be
modtffed or altered wlthoUt permtaslon from the Zenith
Radio C<>rporatlon. All components should be replaced only with types
ldenttcal
to
those In
the
orlQfnal circuit. Special components are used
to prevent shock and fire hazard. These critical components are shad-
ed on the schematic and parts list for easy Identification.
Thia circuit diagram may occasionally differ from the actual circuit
used. This way, Implementation of the
latest safety and performance
lmprovtment changes Into the set ls not delayed until the new
MrYlce
literature 18 printed.
YEL/GRN
BLU
R205
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9
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IMP<>AT
ANT SAF&n
NOTlCE
Pb~ 'X;RADb\TfoN~·
·FIRE .
OR·,
SHOCK
HAZARD PREV,ENTION,1 CERTAIN SPE·
CIAL OR REDUNDANT PARTS.ARE USED.
USE
I
ONL V'
EXACT
REPLACDIENTS. ·DO
NOT Al.TEA THE CIRCUIT OR DEFEAT
THE FUSES. FAILURE TO COMPL V MAY
BE UNLAWFUL.
Figure 2-12. CRT Monitor Schematic Diagram, Source 3
(D12 Series)
2-43/2-44
Digital Systems Division