Star Tech Journal

11
STAR*TECH JOURNAL/DECEMBER 1982
Figure 1
System Power
A
9vac ~
Interlock Switches
~(2)
-~--<
L
r-
I
Line
Filter
'1i;
.
+ 11.5vdc
Power
Supply
15vac•
35vac
C:
'\
On/Off
Switch
Service
Outlet
~
I-
6.3vac ~ r i d g e +4.5vdc-§oin
Door
Rec.
Lamps
100vac - - - - - - - - - -
(isolated)
+ 5vdc
+12vdc
+30vdc
-12vdc
Main
Logic
Board
+20vdc
Sound
Board
I
~
Coin
Counter
Monitor
Fluorescent
Lamp
NOTES
1. Two interlock switches: one on front door, one on back
door.
2. On/off switch located on top left side of cabinet
3. Both bridge rectifiers located ON transformer assembly.
4. 6. 50,000 MFD 25vcapacitor(notshown)attachedto
output of bridge supplying + 11.5vdc.
5. •15vac has grounded center tap.
6. +30vdc also used for knocker solenoid mounted on
lower back of coin box holder.
FUSES
F1
F2
F3
F4
F5
tF6
Figure 2
MIN
MODE
QND
Vee
A14
A13
All
A1Z
A11/S4
All/SI
A11
AID
At
Al
[:o~EJ
A11/SS
A111S6
Uli
(HIGH)
MN/Ill!
AD7
ADe
Ill)
HOLD
(1£0/ll'rn)
ADI
HLDA
111ll/Ofi1
AD4
WII
(LOCK)
ADZ
ID/Ii
(82)
ADZ
ADI
DT/11
(51)
1!rll
1801
ADD
ALE
NIii
(OSOi
(011)
INTR
1IITl
TOT
CLK
R!ADV
QND
REIET
SOUND/SPEECH BOARD - In addition to the main logic board, there is
also a sound/speech board mounted on the back door. This sound/speech board
is identical ( except for the program PRO Ms, which vary from game to game) to
the ones used in talking Gottlieb pinball games. An addition input ( not used in
the pinballs) S32 is used as the MSB of the binary code.
The board includes a CPU section consisting of a 6502 microprocessor and
4K of program memory. This processor dictates control over an SC-0 l voice
synthesizer. This IC provides 64 individual phonemes (one of a set of the
smallest units of speech) and will also add pitch (inflection) and frequency
( duration) to each of the phonemes that it generates.
Failures of the CPU section and voice synthesizer are infrequent, with the
majority of failures appearing at the input buffers (U 16) or at the output
amplifier (U23). When troubleshooting "sound problems", keep in mind that
this board needs 4 voltages (+5, + 12, -12, and +30) to operate. Also, do not
remove any connectors until the LED indicator (D25) for the +30vdc audio
amp reference is completely off!
MISCELLANEOUS AUDIO INFO
Audio Amp
LM379S
Voice Synthesizer
SC-01
Sound/Speech PRO Ms
2716 (2)
Volume Pot
100ohms/2W
Speaker
4 ohms/3W
(Transformer Assy.)
Primary power
4 amp sb
6.3vac
3 amp sb
Monitor
2 amp sb
9vac
10 amp sb
15vac
1 amp sb
Knocker (+30vdc) 1 amp sb
F11
F21
31
32
F41
(Power Supply)
+5vdc source
Sound/speech bd.
Sound/speech bd.
Sound/speech bd.
Coin meter
5 amp sb
1.5 ampsb
.25ampsb
.25ampsb
1 amp sb
t Fuse located next to knocker coil.
SELF TEST/BOOKKEEPING
There is an especially thorough self-test feature built into "Q•BERT". Entering
the self-test mode is accomplished by toggling the self-test switch located on the
service panel assembly inside the cash door. There are eight separate categories
listed in the self-test menu. Selection of each specific category is done with the
switch labeled "SELECT" (located next to the self-test toggle switch). Holding
this select switch down with the arrow pointing to the desired test will begin that
particular test.
TEST
CHECKS
1) Monitor adjustment
Alignment, color ( 4 different patterns)
2) Dip switches
Dip switch settings - functional description
3) Distributions
Game percentages, averages
4) Options/parameters
Most game settings
5)Memory
RAMs & ROMs (logic board)
6) Switches
Coin & control panel switches
7) Sound test
36 different game sounds
8) Object priority
Object display & priority circuit (logic board)
NOTES
l. Memory test (step 5) if no failures are detected will appear as:
Check Sum
RAMO ✓
ROMO
41BE
✓
RAMl
ROMl
AA73
RAM2 ✓
ROM2
06A3
RAM3 ✓
✓
E7
2. Audio test (step 7) counts in binary using the 6 sound outputs from the logic
board. Test counts upto41 but no sounds are produced on counts 16, 29, 30,
31, and 32.
Please take note that the pushbutton test switch on the sound/speech board will
cause only a high pitched hum while the switch is being depressed (good for
checking audio amp and speaker).
BOOKKEEPING - Two battery backup RAMs store all bookkeeping
functions. These functions can be accessed during self-test sections (3)
"Distrubtions" and ( 4) "Options/Parameters". Please take note that perhaps
the most important bookkeeping total (the coin count) is not left entrusted to a
battery RAM, but instead a mechanical coin counter is mounted on the service
panel (next to self-test switches).
OPTIONS/ADJUSTMENTS
OPTIONS - Option settings like Midway's "TRON" are adjusted with a dip
switch (B 13) in conjunction with the" options/parameters" category ( step 4) in
self test. Options which can be set using the dip switch include a free play
setting, cocktail or upright game and attract mode sounds (yes or no?). The
majority of options, however, are set in self-test mode. Various coin/credit
combinations, number oflives per game, bonus settings, and the high score reset
are all programmable. Please take note that there is also a difficulty setting.
Game:; from the factory are set for "Normal". When players' skills improve,
this can be changed to "Hard".
(Continued on next page)