RCA 18V100 System Checking, System Connections, Test Procedures, Selector, To Antenna Power

Studio II Servicing

The recommended Studio II service procedure is to deter-

mine whether the problem is in one of the periphery

components, the interconnecting cables or in the console

itself. If the PC board in the console is found to be faulty,

it must be returned to RCA for repair on an exchange basis.

See Page 14.

IMPORTANT: No attempt should be made to

adjust or repair an inoperative PC board —with

the exception of the clock-frequency adjustment

described on Page 13.

As an aid to servicing Studio II, a test cartridge (see below)

is available from RCA. The cartridge is not essential to service

Studio II; however, it does provide a quick and convenient

means for isolating malfunctions in the digital systems.

When a Studio II comes in for service, it is important that

you have all three assemblies: Selector Switch Unit, Power

Supply Unit and Console. If the complaint involves one or

more plug-in cartridges, these should be included as well.

SYSTEM CHECKING

Checking Studio II operation can be done quickly and

easily using a test cartridge available from RCA (see Page 15

for ordering information). System performance can also be

checked by operating each built-ingame function; however,

this procedure takes more time than the test cartridge check.

SELECTOR

SWITCH

TO ANTENNA

POWER

\0> SUPPLY *use 75 ohm/300 ohm matching

transformer if required.

Figure 2. Studio II Connection Diagram

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SYSTEM CONNECTIONS

Studio II connects to the 300-ohmVHF antenna terminals

of any TV receiver. Figure 2 describes the hookup of the three

subassemblies. Figures 4, 5 and 6 descirbe the hookups with typical video-tape machines and typical cable TV setups.

Recessed on the underside of the console are two slide

switches (Fig. 3). One switches the game sound (beeper) on or

off while the other changes operating channel. Studio II oper-

ates on TV Channel 2 or TV Channel 3 depending on the

position of the switch. The switch should be set on the unoc-

cupied channel; or areas where both channels are occupied,

on the channel with the weakest broadcast signal. Units

are shipped from the factory with the switch in Channel 3

position.

Slide the switch on the Selector Switch Unit (Fig. 7) to

"Studio 1". This sends power to the console (indicated by the

red glow of the pilot light on the console) and connects it to

the TV receiver. Studio II is now ready for operation.

TEST PROCEDURES

Press the "Clear" button on the console and press Key 4 on

left-handKeyboard A (Key A4). This sets Studio II for "Free-

way" and the track (Fig. 8) appears immediately. If necessary,

adjust the receiver's fine tuning and vertical/horizontal hold

controls.

Operational Checks Test Cartridge

(See Page 7 for procedure using built-inprograms).

The test cartridge, which plugs into the cartridge slot on the

Studio II console, scans the digital circuitry for trouble with a rou-

tine that takes about 30 seconds. If it finds a malfunction, the fact

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Figure 3. Locations of Channel Change and Sound

On/Off Switches

ANTENNA

I

STUDIO

	VIDEO	TWIN	SELECTOR	TWIN	TV	sj
	CASSETTE
		LEAD?	SWITCH	LEAD^	RECEIVER
	MACHINE	^-^	ANTENNABOX	/
			TERMINALS
Figure 4. Selector Switch Box Connects Between Video
	Cassette Recorder and Home Receiver
CO -AX	CATV	TWIN	STUDIO	TWIN	TV
			SELECTOR
CABLE	TUNER	LEAD^	SWITCH	LEAo7	RECEIVER
			BOX

^ANTENNA , TERMINALS

Figure 5. Selector Switch Box Connects Between CATV Tuner

and Home Receiver