S*TJ JANUARY 1982 11
the factory and should not have to be touched. Any attempt to readjust these pots should be followed
by measuring and resetting the+ 5 and/or+ 12 volts.
LOGIC BOARDS/HARDWARE - There are three boards located on the back door of the cabinet.
1) Video Processor PCB - performs and displays all screen functions (Basic Timing).
Description
No.
Location
Processor
6809
1
U 82
Screen RAM
4116
3 2
Upper right quadrant
6514
2
U 85, U 86
Battery RAM
CRT Controller
68A45
1
U 18
Crystal
20MHZ
1
Between U 7 and U 23
Battery
3.6VNicad
1
Bottom middle of PCB
2) ROM/I.O. PCB - contains all program and sound proms, also all coin door and
control panel interface controls.
No.
( on "QIX")
Location
Description
U3 thru U19 except U6 & U15
Program Proms
14
2716
1
U27
Sound Proms
2716
Ull, U20, U30
IO Ports
6821
3
Next to Connectors
Output Driver
TIP 120
11
Transistors
3) Data Sound PCB- synchronizes all game operations and the generation of all audio.
Description
No.
Location
Data Processor
6809
1
U2
Sound Processor
6802
1
U5
7.3728MHz
1
Bottom middle of PCB
Crystal
Sound PIAs
6821
3
U7, U8, U20
Audio Amps
TDA2002
2
U29, U30
HARDWARE COMMENTS:
As can be seen, the board set and hardware used in "QIX" are somewhat similar to that of Williams
"DEFENDER". Thesameprocessor(6809)andalargenumberof4116 display RAMs with a
separate PROM and sound board are the principle similarities.
However, the use of three microprocessors gives this system great flexibility and makes it quite
unique. Only a portion of what this board system can do is used in "QIX". Later games may
incorporate even more spectacular graphics and audio. (Provisions for speech are already
incorporated in PROM and audio boards.)
MONITORS-Themonitorsusedin "QIX" are the same asthoseusedinmostU.S.
manufactured games. They include:
Electrohome - G 07-904 ( 19 ,, C 1 )
G 07-907
or
( 19 ,, C 1 )
Wells Gardner- 19K 4601/-06
19K 4653/55/56
or
GAME INPUTS - All inputs enter the ROM/I.O. Board.
Location
Switch
Pin No. Board Input Wire Color IC Pin Input
Coin Door
Bm
Ull 14
Left Coin
115-5
2
Coin Door
Right Coin
115-6
Red
Ull 15
3
Coin Door
Tilt
Org
Ull 17
115-8
4
Coin Door
Adv. Test
115-1
Yel
Ull 10
5
Coin Door
Adv. Sub. Test
Gm
Ull 11
115-2
6
Test Up
Coin Door
115-3
Blu
Ul 1 12
7
Coin Door
Test Down
Vio
Ul 1 13
115-4
8
1 oystick Left
Control Panel
2
116-3
Bm
U20 5
Control
Panel
1 oystick Down
116-4
Red
U20 4
3
°
°