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Hello, new to group. This is the main board from this unit. Not sure if it original, but it has been modified as there is no Aux board. I replaced all caps. Took voltage measurements and all checked out. +5VDC,+7.5VDC, and +16VDC.
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The edits are as follows:

1) Trace is cut from 6P Pin 20 to (7N Pin 4)

2) Trace is cut from 6N Pin 20 to (7N Pin 3)

3) Trace cut from 7N Pin 13 to 6D Pin 16

4) Pin 10 from 7L lifted going to Pin 18 of Row 6x

5) Pin 1 of 7F is lifted. *

6) wire jumper from 6B Pin 5 to 7N Pin 13.

7) Wire jumper from 6P Pin 20 to 7N Pin 5.

8) Wire jumper from 6N Pin 20 to 7N Pin 6.

9) Pin 9 and 10 of 7L is jumpered this goes to 6K Pin 18.

There is no Aux board and the z80 has been placed on main pcb.

All 6 ROMs on Row 6 are 2532's-24 pin
7N - SN74LS42N -16 pin Motorola
7L-SN74LS02N-14 pin. Tex Instruments
7F-S320-07AXN-AXHD Midway

ROMs 5E and 5F appear to be orig Ms PACMAN Roms as they are labelled as such.

It boots and it is programmed for Fast play
All of the modifications appear to be as published. Other than the 2x 24 pin socket savers were placed at 6P and 6N instead of 6K and 6M and

I am Not sure why Pin 1 of 7F is lifted?
(It appears 7F filters the blue , green and red. Pin 1 lifted effects the red.)

I would like to convert this to normal speed play. I do not have a Rom programmer or Eraser.

With the edits above what needs to be done to accomplish normal speed play? I tried a 6F normal speed play ROM . This did not work

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