RCA 18V100 service manual Minimize radiation of modulated carrier, Saw. See for dimensions

Page 12

cable in slot in cover (Fig. 27). Shield must be fully seated to

minimize radiation of modulated carrier.

Figure 27. Disconnect Co-AxShield First to Replace Cable.

Resolder Center Lead First on Installation.

Do Not Overheat Foil in Board.

LED indicator Replacement

NOTE: Installing a new LED in the console re-

quires the use of a special tool that can be fabri-

cated from a piece of sheet metal with a sabre

saw. See Fig. 28 for dimensions.

*m 5.75- M

I

MATERIAL:

0.050 ALUMINUM

2

OOR STEEL

3 z

2

I

0.26"

-»»jo.2rj-«- T

Figure 28. LED Replacement Tool

1Unsolder the black and white leadwires from "Clear"

switch terminals and unsolder the yellow wire from the LED

pigtail. This frees the console top half for LED replacement.

2.Snip both LED pigtails off close to the LED.

3.Place console cover, face up, on block and drive out old

LED with small screwdriver or 1/8-inch drift pin.

4.From underside of cover, bend clipped pigtails back and collapse black plastic holder with needlenose pliers or diagonal cutters. Remove holder from console holes using pliers or

cutter.

5. Install new LED holder. Press holder gently into hole in

console cover until it clicks into place (Fig. 29).

Figure 29. Cross-Sectional View of Seated LED Holder in

Console Cabinet

6.Place new LED in LED holder with shorter (cathode)

pigtail toward side connected to "Clear" switch (see Fig. 30 and 31 ). This is important indicator cannot light if con-

CATHODE (-)PIGTAIL

SHORTER THAN ANODE

d - /

+

Figure 30. Polarity Marking on LED

-. +

T>

/ YELLOW

>WIRE<r_

* n

PLASTIC PILLAR

(PART OF CONSOLE CABINET)

Figure 31. Indicator Assembly

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*

J

j

^

,>

12

Image 12
Contents Itc/i Table of Contents Power Supply Keyboard ON/OFF Indicator LightSelector Switch SwitchTest Procedures To Antenna PowerSystem Checking System Connections9a appears on screen immediately, and Tester Board must be replacedOne at a time of Keyboard A, and then Keyboard B. As Overall Block Diagram of Studio II System £ sjThree Numbers to be Added Punch up Addition game Key A5. Sound switch Must be on Keyboard TestsMalfunction. If Tester is unavailable, the keyboards can be Enter a series of wrong answers, beginning with A1 As eachPletes the DC circuit between the console and power supply With the switch in the TV position, it disconnects the conComponents Coaxial cable from the console to the twin lead and comStudio II Console Assembly Component Replacement Procedure Console DisassemblySaw. See for dimensions Minimize radiation of modulated carrierClock Frequency Adjustment Procedure Scope Time-Base Locked to 60Hz Power LineReconnect black, white and yellow leads from PC board Milliseconds or more sync on Line and vertical inputExchange Plan Description PC Board Packing and ShipmentReturn Shipping Label RCA Distributor and Special Products Division Deptford NJ Form 3E4589