Service Bulletin Nº 91

Service Bulletin Nº 91
Joe Blackwell
Technical Support Manager
Eric Winston
Technical Support Engineer
TO:
Parts & Service Managers
DATE:
November 27, 1996
SUBJ:
Ted Kilpin
Technical Support Engineer
Jay Alfer
Tech. Doc. Administrator
Magnet Processor Board & Magnet Disc Motor Updates
SYMPTOM:
The Skill Shot is awarded when the Right or Left Flipper Button is pressed at the start of
each ball while the ball is still in the shooter lane, the Spinning Disc Magnet intermittently
energizes throughout the course of a game and the 3 Amp Magnet Fuse located underneath
the playfield may blow every couple of days.
REASON:
This game extensively utilizes the Magnet Feature during Multiball ("sense & grab" and
"holding of the pinball"). The Zener Diode 1N6267A, Loc. D13, may have failed and is now
shorted (check with a meter). A contributing factor to this diode failure is an intermittent
reset problem which may be contributed by noise from the Neon Bulb across the Spinning
Disc Motor Connector.
SOLUTION:
Order the Twister Mag Update Kit, Part Nº 500-6173-00, which includes two (2) 1N6267A
Zener Diodes and one (1) 22W 1/2 watt resistor. With this kit you can add the replacement
diodes on the Magnet Processor Board and add a 22W 1/2 watt resistor to the Connecter on
the Motor Wiring Harness (after removing the Neon Bulb).
BOARD UPDATE PROCEDURE:
Replace the defective Zener Diode 1N6267A, Sega Part Nº 112-5011-00, and add one in
parallel at Loc. D13; Ref. Fig. 1 on the Magnet Processor / Driver Schematic on the next
page.
MOTOR UPDATE PROCEDURE:
1. Remove the Neon Bulb from the Magnet Disc Motor Connector.
2. Add a 22W 1/2 watt resistor, Sega Part Nº 121-5040-00, in series with the Disc Motor
TI 2.2J 205VDC/160VAC Capacitor (Sega Part Nº 125-5002-00) located at the harness
connector. Refer to the Magnet Disc Motor Drawing on page 3.
Continued on the next pages.
1990 Janice Avenue • Melrose Park, IL 60160 • Tel 708-345-7700 or Toll-Free (USA/Canada) 1-800-542-5377 • Fax 708-345-7889
Page 1 of 3
Sega Pinball Inc. © 1996
Technical Service Bulletin 91
MAGNET PROCESSOR SCHEMATIC
+50V
+5V
+5V
+5V
+50V
+50V
RED
VIO/YEL
14
C1
220uF
6.3V
14
C2
.1uF
+
C9
.1uF
100V
VCC
1
U1
2
PIC16C56HS/P
J3
U1
R31
33
RESET
12
RA3
Pin-4
11
WHT/BLK
+
C17
.01
Ensure this
Zener Diode
1N4736
(located on
solder side)
is present.
D1
1N4001
WHT/GRY
9
X1
8 MHz
SAT SW.
+5V
OSC1
15
+5V
Q5
2N3906
OSC2
RB7
R1
2.2K
D2
1N4001
WHT/BRN
7
GRN/YEL
FLP. SW.
Q1
2N3904
C5
.1uF
9
RB6
RB3
KEY
R17
100
6
R11
+
1
WHT/GRN
RA1
18
3
12
R26
47
+5V
RTCC
47K
R16
100K
Q8
TIP32C
J3
+5V
R14
100K
1
RA2
RB5
D6
1N4004
17
4
C6
.1uF
11
3
R6
2.2K
RA0
R8
R7
330
R24
33K
RB4
D17
LED
D14
6.8V
1.5KE6.8A
R30
160
5W
C14
2.2uF
100V
D10
FR302
D4
1N4004
3
R13
47K
BLU/WHT
R12
47K
330
D16
LED
BLU
1
D12
33V
1N4752
Q6
2N3906
13
C12
.1uF
100V
R28
10
Q10
TIP36C
R22
560
3W
+5V
R9
C8
100uF
100V
Q4
2N5551
R20
3.3K
RB1
C4
.1uF
D15
1N4004
BLK
D9
FR302
add a
Zener Diode 1N6267A
in parallel
+5V
GND
C13
2.2uF
100V
R29
160
5W
47K
D3
1N4004
C11
.1uF
100V
RB0
7
C3
.1uF
GRY/GRN
6.8V
replace
defective
Zener
Diode
1N6267A
2.2K
8
9VAC
D11
33V
1N4752
3
D8
6A1
R4
R18
100
ORN/RED
R23
33K
WHT/BRN
J2
C16
.1uF
10
2
D13
+5V
R3
2.2K
ORN/BRN
1
Fig. 1
Q7
TIP32C
R10
47K
12
+50V
6
J2
Q9
TIP36C
C15
.1uF
R2
2.2K
Q2
2N3904
5
D5
1N4004
R15
100K
R5
2.2K
RB2
10
+5V
13
8
C10
.1uF
100V
R27
R25
47
R21
560
3W
/MCLR
16
C7
100uF
100V
Q3
2N5551
R19
3.3K
2
6.3V
R32
820
SWITCH
MATRIX
D7
6A1
J1
10
GND
5
MAGNET PROCESSOR BOARD, 2X
520-5143-00
Please Note: Update your Manual
Schematic, Section 5, Chapter 2, Page 90:
As shown above, J2 should be Magnet Disc,
and J3 should be Magnet Diverter. The
manual referenced them the other way around.
C10
.1uF
100V
R27
R25
47
10
Q9
TIP36C
R21
560
3W
Fig. 1
Q7
TIP32C
J2
D13
D11
33V
1N4752
R11
6.8V
replace
defective
Zener
Diode
1N6267A
WHT/BRN
3
C13
2.2uF
100V
R29
160
5W
D9
FR302
1
47K
WHT/GRN
add a
Zener Diode 1N6267A
in parallel
Page 2 of 3
Sega Pinball Inc. © 1996
Technical Service Bulletin 91
Twister
Twister Mag
Mag Update
Update
Kit,
Part
#
500-6173-00
Kit, Part # 500-6173-00
includes
includes two
two (2)
(2) each
each
1N6267A
1N6267A Diodes
Diodes and
and
one
(1)
each
22
W
one (1) each 22W 1/2
1/2
watt
resistor.
watt resistor.
MAGNET DISC MOTOR DRAWING
Motor 24v AC
60Hz 3W 6 RPM CW
Remove the Neon Bulb
from the Magnet Disc Motor
Connector by clipping the leads.
This connector should have
this large yellow capacitor, not the
small "disc" shape .01 Capacitor.
TI 2.2J.
250VDC/160VAC
CAPACITOR
22W 1/2W
Resistor
After removal of the Neon Bulb, add
this resistor in series with the Capacitor.
Connector
Page 3 of 3
Sega Pinball Inc. © 1996
Technical Service Bulletin 91
Twister
Twister Mag
Mag Update
Update
Kit,
Part
#
500-6173-00
Kit, Part # 500-6173-00
includes
includes two
two (2)
(2) each
each
1N6267A
1N6267A Diodes
Diodes and
and
one
(1)
each
22
W
one (1) each 22W 1/2
1/2
watt
resistor.
watt resistor.
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