Texas Instruments 990 Manual page 143

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GENERAL NOTES: UNLESS OTHERWISE SPECIFIED.
I. ALL RESISTORS 1/4W, 5% VALIJES IN OHMS.
2, ALL CAPACITOR VAL.lJES IN MICROFARADS. FOR CAPACITOR TYPES, SEE NOTE #9.
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DENOTES .1101 PC CARO EDGE CONNECTOR.
4. ~}-DENOTES CONNECTION TO OFF BOARD COMPONENTS.
5. REFERENCEDESIGNATIONSNOTUSED. R113,R115,R126
LAST REFERENCE DESIGNATION USED. Rl33, Cl23
PROTECTIVE ARC GAPS ARE AN INTEGRAL PART OF PRINTED WIRE BOARD.
THE PWB CIRCUIT GROUNDS ARE BROUGHT OUT SEPARATELY TO PINS I , 5 ANO I 0 OF
JIOI. PWB CIRCUIT GROUNDS FOR PINS I AND 5 OF JIOI ARE CONNECTED TOGETHER
BY A .JUMPER WIRE ON THE BOARD ANO ARE CONNECTED TO CHASSIS GROUND VIA
A WIRE FROM El 10 ••
THE DATA DISPLAY UNIT IS CONNECTED TO THE SYSTEM GROUND THROUGH PINS I
AND I 0 OF JIOI. FOR NON-STANDARD GROUNDING TECHNIQUES. REFER TO SECTION
2 OF THE SERVICE MANUAL.
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Figure 2-11. CRT Monitor Schematic Diagram, Source 2
(TVl 20/-0200133)
2-41/2-42 Digital Systems Division