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.