Stern Pinball SB-100 Sound Board
Boards With CHIME Circuits (Original SB-100)
The first version of the SB-100 we'll look at is the fully populated board with the U5 chip and CHIMES circuitry.
Picture: Stern SB-100 with CHIMES circuitry. Board is fully populated (and a little dusty)
Schematic
Original SB-100 schematic from Hot Hand manual
Component List
Here is a component list that I gathered
from the SB-100 schematics in a Stern Hot Hand manual. Again please
note that these components are for the SB-100 that has a U5 IC and whose board is fully populated. If your board is missing U5 and instead looks like the Rev C-1 board (see below), then its component list is slightly different.
Resistors | Capacitors | |||||
12 | 100k ohm | r3, r4, r5, r7, r8, r9, r10, r11, r14, r17, r81, r86 | 1 | 0.003uf | c38 | |
9 | 10k ohm | r24, r27, r30, r33, r36, r67, r71, r83, r84 | 1 | 0.022uf (50v) | c45 | |
5 | 10m ohm | r40, r41, r52, r53, r90 | 1 | 0.033uf | c39 | |
1 | 15k ohm | r21 | 32 | 0.1uf | c2, c3, c4, c5, c6, c7, c8, c10, c12, c13, c14, c16, c17, c23, c24, c25, c26, c27, c28, c29, c30, c31, c32, c33, c34, c35, c37, c40, c43, c46, c49, c54 | |
5 | 1k ohm | r19, r20, r65, r70, r88 | 1 | 1000uf (25v) elec. | c51 | |
5 | 1m ohm | r22, r25, r28, r31, r34 | 1 | 1000uf (35v) elec. | c53 | |
2 | 2.2 ohm | r64, r66 | 1 | 100pf | c44 | |
11 | 2.2k ohm | r1, r12, r15, r16, r23, r26, r29, r32, r35, r68, r89 | 2 | 10uf | c42, c52 | |
5 | 2.2m ohm | r69, r77, r78, r79, r80 | 1 | 220uf (25v) bi-polar elec. |
c47 (could also use 100uf in parallel at c47, c48) | |
2 | 220 ohm | r91, r92 | 1 | 22uf (10v) tant. | c9 | |
1 | 22k ohm | r63 | 1 | 3.3uf | c18 | |
4 | 390k ohm | r73, r74, r75, r76 | 6 | 4.7uf (10v) tant. | c1, c19, c20, c21, c22, c50 | |
1 | 39k ohm | r62 | 1 | 47uf (35v) elec. | c55 | |
8 | 47k ohm | r39, r42, r51, r54, r61, r82, r85, r87 | 2 | 56pf | c36, c41 | |
1 | 56k ohm | r72 | 2 | 680pf | c11, c15 | |
3 | 5k ohm (pot) | r2, r6, r13 | ||||
1 | 680k ohm | r18 | ICs | |||
16 | 820k ohm | r37, r38, r43, r44, r45, r46, r47, r48, r49, r50, r55, r56, r57, r58, r59, r60 | 1 | 7402 | u1 | |
1 | 7411 | u2 | ||||
Transistors / Semiconductors | 3 | 7475 | u3, u4, u5 | |||
5 | 2n4403 | q1, q2, q3, q4, q5 | 1 | 74107 | u6 | |
2 | 2n3904 | q6, q7 | 1 | 7408 | u7 | |
1 | 1n763a | cr1 | 2 | 4013 | u8, u9 | |
1 | 1n758a | cr2 | 5 | mc3340p | u10, u11, u12, u13, u14 | |
4 | lm324n | u15, u16, u17, u18 | ||||
1 | 556 | u19 | ||||
2 | lm380 | u20, u21 | ||||
1 | 78L05 | u22 |
Boards Without CHIME Circuits (Revision C-1)
The next board version we'll look at is a Rev C-1. This board does not have the U5 IC or CHIMES circuitry, nor does it have the silkscreen drawings/labels for the missing components. There is another [assumed earlier] revision of this board that has the silkscreen labels on the omitted components.
Picture: Stern SB-100 Rev C-1. No CHIME circuitry.
Schematic
The schematic below is the original SB-100 with the components that are not on the Rev C-1 board grayed out.
Component List
For boards with a U5 IC and chimes circuits, the component list should be something like below. **This may be incorrect as I've eliminated components from the fully populated board schematics and have not verified every single component values for the Rev C-1 board, but should be pretty close. The on-board potentiometer values are definitely different on my Rev C-1 boards.
Resistors | Capacitors | |||||
12 | 100k ohm | r3, r4, r5, r7, r8, r9, r10, r11, r14, r17, r81, r86 | 1 | 0.003uf | c38 | |
5 | 10k ohm | r24, r67, r71, r83, r84 | 1 | 0.022uf (50v) | c45 | |
1 | 10m ohm | r90 | 1 | 0.033uf | c39 | |
1 | 15k ohm | r21 | 20 | 0.1uf | c2, c3, c4, c5, c6, c7, c8, c10, c17, c23, c24, c28, c31, c35, c37, c40, c43, c46, c49, c54 | |
5 | 1k ohm | r19, r20, r65, r70, r88 | 1 | 1000uf (25v) elec. | c51 | |
1 | 1m ohm | r22 | 1 | 1000uf (35v) elec. | c53 | |
2 | 2.2 ohm | r64, r66 | 1 | 100pf | c44 | |
7 | 2.2k ohm | r1, r12, r15, r16, r23, r68, r89 | 1 | 10uf | c42 | |
5 | 2.2m ohm | r69, r77, r78, r79, r80 | 1 | 220uf (25v) bi-polar elec. | c47 (could also use 100uf in parallel at c47, c48) | |
1 | 220 ohm | r92 | 1 | 22uf (10v) tant. | c9 | |
8 | 47k ohm | r39, r42, r51, r54, r61, r82, r85, r87 | 1 | 3.3uf | c18 | |
1 | 56k ohm | r72 | 2 | 4.7uf (10v) tant. | c1, c50 | |
3 | 5k ohm (pot) | r2, r6, r13 | 1 | 47uf (35v) elec. | c55 | |
1 | 680k ohm | r18 | 2 | 56pf | c36, c41 | |
1 | 680pf | c11 | ||||
Transistors / Semiconductors | ||||||
1 | 2n4403 | q1 | ICs | |||
2 | 2n3904 | q6, q7 | 1 | 7402 | u1 | |
1 | 1n758a | cr2 | 1 | 7411 | u2 | |
2 | 7475 | u3, u4 | ||||
1 | 74107 | u6 | ||||
1 | 7408 | u7 | ||||
2 | 4013 | u8, u9 | ||||
1 | mc3340p | u14 | ||||
2 | lm324n | u17, u18 | ||||
1 | 556 | u19 | ||||
2 | lm380 | u20, u21 | ||||
1 | 78L05 | u22 |
Continue to How The Boards Work..
Comments:
Stern Nugent Sound Board needed |
Posted 05/03/12 1:53PM by nowears |
Please let me know when / if you have a stern sb-100 sound board available. My Nugent does not have one. Thanks, |
Re: Anonymous Techdoser |
Posted 12/31/11 2:41PM by AceBHound |
Hi Bob, contact me via email on the "Contact Us" page on the left-hand navigation menu on this website. We can discuss details further. |
Anonymous Techdoser |
Posted 12/26/11 4:04PM by Anonymous Techdoser |
Hi, Do you have an SB-100 for sale and how much? Would you give a discount for my non-working board? If not, how much to repair mine? Thanks, Bob |
Re: Great Info |
Posted 12/05/11 6:38PM by AceBHound |
I may have an extra SB-100 available soon -- I'll email you. Also for anyone else interested, I will likely have more for sale down the road & entertain repairing some boards for people as time permits if they aren't severely hacked. Repair costs would depend on how "dead" your board is. Email is on my Contact page on this website. |
Great Info |
Posted 11/03/11 4:43PM by bobcav |
This is great info. I'm currently looking for an SB 100 sound board as my Nugent machine has never had a board since I've owned it. Any thoughts on how to acquire one, either in working order or not? |
Stern SB 100 sound board |
Posted 03/10/11 8:24AM by Anonymous Techdoser |
what a great help! The test point voltages certainly gave me the confidence to make a repair to a Stern "Magic". I had replaced the chips in their entirety, capacitors, transistors, zenner diode and a couple of blown resistors. Until I found your voltage listing I could not have any confidence in the work I had done. I soon traced the problem to a cracked lead on the circuit board, in the voltage splitter prior to the amp chips. Thanks!!!! |