Mephisto

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1 Introduction

This pinball machine was manufactured in 1987 by a Spanish company, Universal de Desarrollos Electronics, S.A. Their various trade names were Unidesa/Cirsa/Stargame.

It is horror-themed and has both 2 and 3-ball multiball.

The boardset is unique and the playfield parts are as well.

The manual for the game is in Spanish. The available scans of the manual available on the internet (see the manual on IPDB) are not good quality and there are some mistakes (to be pointed out below).

2 Technical Info

There are 4 major boards used in this game:

  • Power Feed Board (Carta Alimentacion)
  • Solenoid Driver Board (Carta Potencia)
  • CPU Board (Carta Control)
  • Sound Board (Carta Sonido)

The game used LED displays and there are 4 displays for the players and a credit/match display. As a result, there is not high voltage generation in the machine.

The basic architecture of the game's electronics is:

  • The Transformer sends various A/C voltages to the Power Feed Board
  • The Power Feed Board turns most of these A/C voltages to D/C voltages through the use of 4 bridge rectifiers and sends those voltages to other boards in the game. Also the Power Feed Board holds most of the fuses on the game (the only exception being the main fuse, which is located in the bottom of the cabinet, next to the transformer).
  • The Solenoid Driver Board is responsible for driving the solenoids (actually coils and flashers) in the game.
  • The CPU Board runs the game code and is responsible for driving the displays, the feature lamps, and handling switches
  • The Sound Board generates sound and speech

More t.b.s.

2.1 Power Feed Board

MephistoPowerFeedBoard.jpg

More t.b.s.

2.2 Solenoid Driver Board

t.b.s.

2.3 CPU Board

t.b.s.

2.4 Sound Board

t.b.s.

2.5 Flasher Lamps

This game uses two types of flasher lamps:

  • 12V 15W (9x)
  • 12V 3W (2x)

Lamps with these specs are difficult to find.

The original 12V 15W lamps had a large bayonet base (BA15s) and smaller glass bulb shape (G-6). Identical in size (but not volts or watts) to a standard #89 lamp. Today, the only available 12V 15W replacement with a BA15s base is a #7533 bulb, which is a longer (2.0") and wider (1.04") glass bulb with a S-8 glass bulb shape. In comparison, the original lamps with a G-6 glass bulb shape were 1.44" long and 0.75" wide. The #7533 is not very common, but is still manufactured by CEC Industries. Use of this bulb requires some rework of the mounts for the bulbs to add spacers and longer screws, and in some cases (i.e. the lamps used for the "eyes" behind the backglass), cutting the plastic tubes that surround the bulbs to focus the light and replacing them with larger tubes. A downside to using #7533 bulbs is the average life hours is short, namely 75 hours. Another more direct replacement may be #15025 bulbs. These have the exact electrical specs needed (12V 15W), but also have the smaller glass bulb size (1.48" long and 0.75" wide) in the BA15s base. Testing of #15025 lamps is pending.

The 12V 3W flasher lamps have a smaller wedge base. The closest available replacement is a #161 bulb that is 14V and 2.66W. This has been tested to work in the game.

Another option is to change the resistors used to drop the voltage for the flashers, so that more commonly available lamps with the smaller G-6 glass bulb shape could be used. Each set of flashers uses a resistor board (sometimes 1 board is used for a single flasher, sometimes multiple flashers share a board) to drop the voltage used by the flashers. In theory, you could determine a different mix of resistors to use to get the desired voltage for the flasher lamps you want to use. If anyone has any experience doing this, please share the details in this forum...

Another thing to note is where multiple flashers are used together to be driven by a common transistor (i.e., the skull, the eyes on the backglass, the sun on the backglass, the bat in the topper) they are wired in series. So if a single bulb buns out in the series, the whole set will not light.

More details are t.b.s.

3 Charts

3.1 Fuse Chart

Fuse Type Usage Location
F1 7A SB GI Power Feed Board
F2 7A SB GI Power Feed Board
F3 5A SB Flippers Power Feed Board
F4 4A SB Solenoids Power Feed Board
F5 2A SB Audio Power Feed Board
F6 7A SB Feature Lamps Power Feed Board
F7 7A SB A/C Leg 1 to PR4 (used to generate 12VDC/5VDC) Power Feed Board
F8 7A SB A/C Leg 2 to PR4 (used to generate 12VDC/5VDC) Power Feed Board
X 2A SB Main Cabinet

3.2 Lamp Chart

Feature Lamp Map


Lamp Description
1 Top Lane (center)
2 Top Lane (right)
3 30K When Lit
4 Not used
5 Not used
6 Not used
7 Multiball Arrow 1 (top)
8 Multiball Arrow 2
9 Multiball Arrow 3
10 Multiball Arrow 4
11 Pop Bumper (top)
12 Pop Bumper (bottom)
13 Pop Bumper (right)
14 Ramp Arrow (right)
15 Left Ramp Arrow 1 (top)
16 Left Ramp Arrow 2 (middle)
17 Left Ramp Arrow 3 (bottom)
18 Drop Target Bonus (top)
19 Drop Target Bonus (middle)
20 Bonus (10K)
21 Bonus (9K)
22 Bonus (8K)
23 Bonus (7K)
24 Bonus (6K)
25 Bonus (5K)
26 Bonus (4K)
27 Bonus (3K)
28 Bonus (2K)
29 Bonus (1K)
30 Standup Target (top)
31 Standup Target (middle)
32 Standup Target (bottom)
33 Left Inlane
34 Not used
35 Right Inlane
36 Right Outlane/Gate
37 X5
38 X4
39 X3
40 Left Special
41 Right Special
42 Shoot Again
43 Shooter Lane (1K pts)
44 Shooter Lane (15K pts)
45 Shooter Lane (30K pts)
46 Backglass (Game Over)
47 X2
48 Bonus (30K)
49 Bonus (20K)
50 Multiball Arrow 5
51 Backglass (High Score)
52 Extra Ball
53 Drop Target Bonus (bottom)
54 Multiball Arrow 6 (bottom)
55 Top Lane (left)
56 Backglass "O"
57 Backglass "T"
58 Backglass "S"
59 Backglass "I"
60 Backglass "H"
61 Backglass "P"
62 Backglass "E"
63 Backglass "M"


Col 0

J3.2-10
Brn-Red
TR9

Col 1

J3.2-9
Grn-Red
TR10

Col 2

J3.2-8
Brn-Yel
TR11

Col 3

J3.2-1
Vio-Red
TR12

Col 4

J3.2-3
Brn-Grn
TR13

Col 5

J3.2-2
Orn-Yel
TR14

Col 6

J3.2-4
Vio-Grn
TR15

Col

J3.2-6
Yel-Blk
TR16

Row 0
J3.1-1
Red-Brn
TR1
42
1
48
52
46
51
4
5
Row 1
J3.1-2
Red-Yel
TR2
54
2
49
3
7
0
36
6
Row 2
J3.1-4
Red-Blk
TR3
50
25
20
15
8
14
35
34
Row 3
J3.1-6
Red-Gry
TR4
10
26
21
16
30
37
53
40
Row 4
J3.1-5
Red-Vio
TR5
9
27
22
17
31
38
19
41
Row 5
J3.1-8
Red-Blu
TR6
43
28
23
44
32
39
18
45
Row 6
J3.1-9
Yel-Vio
TR7
11
29
24
12
33
47
13
55
Row 7
J3.1-10
Red-Grn
TR8
56
57
58
59
60
61
62
63

3.3 Solenoids

Solenoid Map


Sol. No Solenoid description Connector Wire Color Coil/Flasher
1 not used
2 Top Pop Bumper J11-3 Yel-Vio Coil 1000/45
3 Right Pop Bumper J11-2 Yel-Vio Coil 1000/45
4 Bottom Pop Bumper J11-5 Yel-Vio Coil 1000/45
5 not used
6 not used
7 not used
8 Left Eject Hole J12-7 Wht-Gry Coil 1300/26
9 Center Eject Hole J12-6 Red-Grn Coil 1300/26
10 Diverter Release J12-3 Yel-Blk Coil 1400/20
11 Ramp Diverter J12-2 Brn-Vio Coil 1300/26
12 3-bank Drop Target Reset J12-4 Brn-Yel Coil 1450/50
13 Single Drop Target Reset J12-5 Grn-Blk Coil 1200/40
14 Trough Eject J12-10 Red-Blk Coil 1300/26
15 Right Eject Hole J12-9 Brn-Grn Coil 1300/26
16 Flasher (skull) J13-8 Brn-Red Flasher 12v 3w (2x)
17 Flasher (top left) J13-6 Red-Yel Flasher 12v 15w (1x)
18 Flasher (eyes on BG) J13-3 Vio-Blu Flasher 12v 15w (2x)
19 Flasher (bat) J13-2 Red-Blu Flasher 12v 15w (3x)
20 Flasher (sun on BG) J13-4 Grn-Red Flasher 12v 15w (2x)
21 Flasher (top right) J13-5 Wht-Blu Flasher 12v 15w (1x)
22 Knocker J13-10 Wht-Grn Coil 1000/35
23 Gate J13-9 Yel-Red Coil 4000/16

3.4 Switch Matrix

Switch Map



Col 0

J4.1-10
Wht
IC30

Col 1

J4.1-9
Wht-Yel
IC30

Col 2

J4.1-8
Wht-Blk
IC30

Col 3

J4.1-7
Wht-Gry
IC30

Col 4

J4.1-6
Wht-Vio
IC30

Col 5

J4.1-5
Wht-Blu
IC30

Col 6

J4.1-4
Wht-Red
IC30

Row 0
J4.2-6
Grn-Brn
IC31
05
11
17
23
29
35
41
Row 1
J4.2-5
Grn-Yel
IC31
04
10
16
22
28
34
40
Row 2
J4.2-4
Grn-Blk
IC31
03
09
15
21
27
33
39
Row 3
J4.2-3
Grn-Gry
IC31
02
08
14
20
26
32
38
Row 4
J4.2-2
Grn-Vio
IC31
01
07
13
19
25
31
37
Row 5
J4.2-1
Grn-Blu
IC31
00
06
12
18
24
30
36

3.5 Connection Charts

The following charts show the connections on each of the boards.

3.5.1 Power Feed Board

Conn-Pin Purpose Wire Color To/From
J25-1
J25-2 GND 9.3VAC Wht From Transformer
J25-3 9.3VAC Wht-Blk From Transformer
J25-4
J25-5
J25-6 9.3VAC Wht-Blk From Transformer
J25-7
J25-8 16VAC Grn-Wht From Transformer
J25-9
J25-10 GND 16VAC Yel-Red From Transformer
J26-1 16VAC (audio) Wht-Vio From Transformer
J26-2 GND 16VAC (audio) Gry From Transformer
J26-3 Earth GND Yel-Grn From Transformer
J26-4 GND 50VAC (coils) Blk-Wht From Transformer
J26-5
J26-6 50VAC Red From Transformer
J26-7
J26-8 KEY
J26-9 50VAC (flippers) Yel From Transformer
J26-10
J27-1 GND 50VAC (flippers) Yel-Brn From Transformer
J27-2
J27-3
J27-4
J27-5 GND 6.3VAC Brn-Grn From Transformer
J27-6 GND 6.3VAC Brn-Grn From Transformer
J27-7 KEY
J27-8
J27-9 GND 6.3VAC Gry-Blk From Transformer
J27-10 GND 6.3VAC Gry-Blk From Transformer
J28-1 16V Wht-Blk To 33,000uF/40V Cap
J28-2 GND 16V Brn-Grn To 33,000uF/40V Cap
J29-1 V GI Gry-Blk To GI via F1-1
J29-2 V GI Gry-Blk To GI via F1-2
J29-3 V GI Gry-Blk To GI via B1-5
J29-4 V GI Gry-Blk To GI via B1-6
J29-5 GND GI Brn-Grn To GI via F1-3
J29-6 GND GI Brn-Grn To GI via F1-4
J29-7 GND GI Brn-Grn To GI via B1-7
J29-8 GND GI Brn-Grn To GI via B1-8
J29-9 KEY
J29-10 GND Flipper (left) Gry-Blk To Left Flipper via B1-9 & R1-1
J30-1 GND Flipper (right) Blu-Vio To Right Flipper via B1-10 & R1-2
J30-2
J30-3 50VDC Flipper Yel To Flipper via B1-3
J30-4 50VDC Flipper Yel To Flipper via B1-4
J30-5
J30-6 50VDC (coils) Red To Coils via F1-8 & direct
J30-7 50VDC (coils) Red To Coils via B1-1 & B1-2
J31-1
J31-2 GND 50VDC (coils) Orn To J10-4
J31-3
J31-4 GND +12VDC (audio) Wht-Vio To J1.2-2
J31-5 +12VDC (audio) Gry to J1.2-1 & J10-3
J31-6 KEY
J31-7
J31-8 GND Feature Lamps Brn-Grn To J1.2-7
J31-9
J31-10 Feature Lamps Gry-Blk To J1.2-6
J32-1
J32-2 +12VDC Wht-Blk To J1.1-1
J32-3
J32-4 -12VDC Wht To J1.2-5
J32-5 KEY
J32-6 +5VDC Yel To J1.1-7
J32-7
J32-8 GND +5VDC Vio To J1.1-6
J33-1 Inh. Flippers Red-Wht To J1.1-3
J33-2 KEY
J33-3 Inh. GI Blu-Red To J1.1-2
J33-4 Inh. Coils Blk-Wht To J10-1
J33-5 Inh. Feature Lamps Yel-Red To J1.1-4

3.5.2 Solenoid Driver Board

Conn-Pin Purpose Wire Color To/From
J9-1 -5V Ribbon From J8-1
J9-2 -5V Ribbon From J8-2
J9-3 Ribbon From J8-3
J9-4 5V Ribbon From J8-4
J9-5 5V Ribbon From J8-5
J9-6 5V Ribbon From J8-6
J9-7 GND 5V Ribbon From J8-7
J9-8 GND 5V Ribbon From J8-8
J9-9 CON 2 Ribbon From J8-9
J9-10 Ribbon From J8-10
J9-11 GND 5V Ribbon From J8-11
J9-12 CON 1 Ribbon From J8-12
J9-13 BD 7 Ribbon From J8-13
J9-14 BD 6 Ribbon From J8-14
J9-15 BD 5 Ribbon From J8-15
J9-16 BD 4 Ribbon From J8-16
J9-17 BD 3 Ribbon From J8-17
J9-18 BD 2 Ribbon From J8-18
J9-19 BD 1 Ribbon From J8-19
J9-20 BD 0 Ribbon From J8-20
J10-1 Inh. Coils Blk-Wht From J33-4
J10-2 KEY
J10-3 V Audio Gry From J31-5
J10-4 GND Coils Orn From J31-2
J10-5
J10-6
J11-1 GND Coils Orn To Coils via B1-11
J11-2 Pop Bumper (right) Grn-Brn To Right PB via B1-12
J11-3 Pop Bumper (top) Yel-Vio To Top PB via B1-13
J11-4 KEY
J11-5 Pop Bumper (bottom) Yel-Blu To Bottom PB via B1-14
J11-6
J11-7
J11-8
J11-9
J11-10
J12-1 GND Coils Orn To Coils directly
J12-2 Ramp Diverter Brn-Vio Via B1-16
J12-3 Diverter Release Yel-Blk Via B1-17
J12-4 Drop Target 3-bank Reset Brn-Yel Via B1-18
J12-5 Drop Target 1-bank Reset Grn-Blk Via B1-19
J12-6 Eject Hole (top) Red-Grn Via B1-21
J12-7 Eject Hole (left) Wht-Gry Via B1-20
J12-8 KEY
J12-9 Eject Hole (right) Brn-Grn Via B1-22
J12-10 Ball Trough Red-Blk Via B1-23
J13-1 GND Coils Orn To Coils via F1-5
J13-2 Flash Lamp (Bat) Red-Blu Directly
J13-3 Flash Lamp (Eyes on BG) Yel-Blk Via F1-6
J13-4 Flash Lamp (Sun on BG) Brn-Yel Via F1-7
J13-5 Flash Lamp (top right) Grn-Blk Via B1-24
J13-6 Flash Lamp (top left) Red-Grn Via B1-25
J13-7 KEY
J13-8 Flash Lamp (Bat) Red-Grn Directly
J13-9 Gate Yel-Red Via B1-27
J13-10 Knocker Wht-Grn Directly

3.5.3 CPU Board

Conn/Pin Purpose Wire Color To/From
J1.1-1 +12V Control Wht-Blk J32-2
J1.1-2 Inh. GI Blu-Red J33-3
J1.1-3 Inh. Flippers Red-Blk J33-1
J1.1-4 Inh. Feature Lamps Yel-Red J33-5
J1.1-5 KEY
J1.1-6 GND 5VDC Vio PS Bd J32-8
J1.1-7 5VDC Yel PS Bd J32-6
J1.2-1 -12V audio Gry J31-5
J1.2-2 GND -12V audio Wht-Vio J31-4
J1.2-3
J1.2-4 KEY
J1.2-5 -12V Control Wnt J32-4
J1.2-6 Feature Lamps Gry-Blk J31-10
J1.2-7 GND Feature Lamps Brn-Grn J31-8
J2.1-1
J2.1-2
J2.1-3 OE? Grn-Blk J23-5 via F2-11
J2.1-4 Data Out Grn-Blu J23-4 via F2-12
J2.1-5 Strobe Grn-Wht J23-7 via F2-13
J2.1-6 Clk Grn-Red J23-6 via F2-14
J2.1-7 5VDC Blu J23-2 via F2-15
J2.1-8 GND 5VDC Gry J23-1 via F2-16
J2.2-1 GND Audio Blk J14.2-5
J2.2-2 KEY
J2.2-3 V Audio Red J14.2-4
J2.2-4 5VDC Yel J14.2-1
J2.2-5 GND 5VDC Wht J14.2-3
J2.3-1
J2.3-2 HSIC Wht-Blk J14.1-5
J2.3-3 RESET Wht-Blu J14.1-1
J2.3-4 RxD Wht-Brn J14.1-2
J2.3-5
J2.3-6 TxD Wht-Grn J14.1-4
J2.3-7 HSOC Wht-Red J14.1-3
J3.1-1 Lamp Row 0 Red-Brn Via T1-1
J3.1-2 Lamp Row 1 Red-Yel Via T1-2
J3.1-3 KEY
J3.1-4 Lamp Row 2 Red-Blk Via T1-3
J3.1-5 Lamp Row 4 Red-Vio Via T1-5
J3.1-6 Lamp Row 3 Red-Gry Via T1-4
J3.1-7
J3.1-8 Lamp Row 5 Red-Blu Via T1-6
J3.1-9 Lamp Row 6 Yel-Vio Via T1-7
J3.1-10
J3.2-1 Lamp Col 3 Vio-Red Via T1-11
J3.2-2 Lamp Col 5 Orn-Yel Via T1-13
J3.2-3 Lamp Col 4 Brn-Grn Via T1-12
J3.2-4 Lamp Col 6 Vio-Grn Via T1-14
J3.2-5
J3.2-6 Lamp Col 7 Brn-Blk Via T1-15
J3.2-7 KEY
J3.2-8 Lamp Col 2 Brn-Yel Via T1-10
J3.2-9 Lamp Col 1 Grn-Red Via T1-9
J3.2-10 Lamp Col 0 Brn-Red Via T1-8
J4.1-1
J4.1-2
J4.1-3
J4.1-4 Switches - Col 6 Wht-Red Via T1-28
J4.1-5 Switches - Col 5 Wht-Blu Via T1-27
J4.1-6 Switches - Col 4 Wht-Vio Via T1-26
J4.1-7 Switches - Col 3 Wht-Gry Via T1-25
J4.1-8 Switches - Col 2 Wht-Blk Via T1-24
J4.1-9 Switches - Col 1 Wht-Yel Via T1-23
J4.1-10 Switches - Col 0 Wht Via T1-22
J4.2-1 Switches - Row 5 Grn-Blu Via T1-21
J4.2-2 Switches - Row 4 Grn-Vio Via T1-20
J4.2-3 Switches - Row 3 Grn-Gry Via T1-19
J4.2-4 Switches - Row 2 Grn-Blk Via T1-18
J4.2-5 Switches - Row 1 Grn-Yel Via T1-17
J4.2-6 Switches - Row 0 Grn-Brn Via T1-16
J4.2-7
J4.2-8
J6-1 Advance button Red-Blu Via M1-9
J6-2
J6-3 Test button Wht-Vio Via M1-10
J6-4
J6-5 GND 5VDC Brn Via M1-11
J7-1 GND 5VDC Blk Via T1-33
J7-2
J7-3
J7-4
J7-5 CB-6 Brn Via T1-21
J7-6
J7-7
J7-8 CB-1 Grn Via T1-30
J7-9 CB-3 Vio Via T1-31
J7-10
J8-1 -5V Ribbon J9-1
J8-2 -5V Ribbon J9-2
J8-3 Ribbon J9-3
J8-4 5V Ribbon J9-4
J8-5 5V Ribbon J9-5
J8-6 5V Ribbon J9-6
J8-7 GND 5V Ribbon J9-7
J8-8 GND 5V Ribbon J9-8
J8-9 CON 2 Ribbon J9-9
J8-10 Ribbon J9-10
J8-11 GND 5V Ribbon J9-11
J8-12 CON 1 Ribbon J9-12
J8-13 BD 7 Ribbon J9-13
J8-14 BD 6 Ribbon J9-14
J8-15 BD 5 Ribbon J9-15
J8-16 BD 4 Ribbon J9-16
J8-17 BD 3 Ribbon J9-17
J8-18 BD 2 Ribbon J9-18
J8-19 BD 1 Ribbon J9-19
J8-20 BD 0 Ribbon J9-20

3.5.4 Sound Board

t.b.s.



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