Circus

  • Manufacturer: Exidy
  • Year: 1977

Useful info

  • Cabinet type: Upright
  • Measures (WxHxD): 64,2 x 169,3 x 73,7 cm
  • Working voltage: 220V
  • Maximum consumption: 113,0W 0,640A
  • Technology: Horizontal B/W raster monitor with colored overlay
Circus, as the name says, brings the player to the circus; but not as a spectator but as the main actor; in fact, through the use of a wheel it is possible to move a catapult to the right and left, on which two clowns alternate with jumping. The ability is to place the catapult under the clown while he is close to the ground, otherwise the poor man will die for the fall. The aim of the game is to blow up all the balloons that sail on the top of the screen; in fact the two clowns  jump just going to explode as much as possible balloons. After the first level the two clowns jump faster and faster: the eye must be alert and the hand ready.

The cabinet shown here in our collection is the original American version in excellent aesthetic conditions.

PCB

7 April 2014

For years I had in my collection the bootleg version of this game probably manufactured in Italy. Fortunately I found a cab without the PCB for few euros. I could put the cab in operating condition very soon thanks to my bootleg and then I had a bit o time to find the original board (thanks to Robotype…). Here the PCB now is in the cabinet.

Dsc_0050 Dsc_0051 Dsc_0053 Dsc_0054 Dsc_0055

This is the connector between the main board and the sound board.

Dsc_0056

And this is the sound board

Dsc_0058 Dsc_0059

Inside

7 April 2014

the cabinet inside was complete and very clean.

Dsc_0046 Dsc_0044 Dsc_0047 Dsc_0048

 

The cab

7 April 2014

Here is the cab.

Dsc_0030

Dsc_0031 Dsc_0032 Dsc_0039 Dsc_0040 Dsc_0041

No video and a whistle

7 April 2014

While I was playing the screen became black and I can hear only a whistle. Checking the voltage I could see I had 2.4V instead of 5V. 5V are generated by a power supply on the left of the monitor. It is the same PS generates 73V for the monitor itself. In the beginning I though something went wrong on the PCB. Sometimes old tantalium capacitors are in short circuit; but after a short verification I could see the board was in working conditions. I just plugged the board on my test desk. So the problem is in the power supply.

No video and a whistle (2)

7 April 2014

Never seen this PS before and no schematics at all (if someone has these schems, please email me) I took some pics

DSCN2314low DSCN2313low

I couldn’t understand which kind of active component this PS has. Here the list I could compile.

  • Q201 = see pic below
  • Q202 = see pic below
  • D201 = diodes bridge
  • D202 = see pic below
  • C201 = ?
  • C202 = 1nF
  • C203 = 100 uF, 10V
  • IC201 = T3 = LM741 see pic below
  • R201 = 67K
  • R202 = 6K9
  • R203 = 3K3
  • R204 = 470
  • R205 = 49
  • R206 = trimmer about 1K5 (used for 5V regulation)

Q201, Q202 and D202 are unknown. Thanks to Andreas I could identify IC201 = LM741

2014-03-30 21.18.09

2014-04-01 02.23.34 Q202

2014-04-01 02.24.16 D202

2014-04-01 02.21.56 IC201

  Replacing IC201 nothing changed but sometimes worked for few seconds. Remaking the solderings the PS started to work properly and after some hours working I can consider the problem solved.

Troubleshooting the spinner

27 April 2014

If you are troubleshooting the spinner I saved some videos while I was checking my board.  

PCB SK2 Troubleshooting (1)

2 May 2016

I want 2 boards for each cabinet I have; that’s because in case of problems I can continue to play my games until the main board has been repaired. So I found an original EXIDY CIRCUS board, sound board included. Actually when I tested it I could see garbage on screen but I could insert coins and “play”.

I tested this board on my cabinet:

circus050
I pointed out directly to the RAMs and related components. After replacing a couple of RAMS I had this result:

circus051
I needed a bit of time (wasting time to replace components into the video section) to understand the problem:

circus052
Yes… Cutting all pins I could reach this status:

circus053
A good result, but not enough. In fact the game freezes after few frames.

PCB SK2 Troubleshooting (2)

2 May 2016

What I know about this problem is that connecting to ground the PIN 1 of the 74H21 in position 15D (signal MVID) I have the game running with a correct attract mode, the spinner works, accepts coins and the game starts. The problem is (obviously) that the “MAN” is missing; in fact that signal manages the jumping man.

circus054
So I had a look to the “MAN” circuit but after some evenings replacing components I replaced ALL components but nothing changed….

circus055
All IN signals seem to be OK. Now I’m blocked, I can’t solve this problem.