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...s", playfield view, while in lamp test. The LEDs should alternate half on, half off during lamp test.]] ...t of the lamp matrix. The LEDs themselves don't fail often, if ever in the life of a game. However, the PCB is subject to fractured solder joints at the la

...ly the 2716 will widstand the 12 volt but this means that always the upper half of the 2716 is addressed you can not reach what is in the lower addresses!! ...had to address the first half of the 2716 from 0000 to 03FF and the second half from 0400 to 07FF, and that is what jumper J1 will do , for position 3 the

...most pinball machines have far outlived their originally intended service life, which was typically 2-5 years. ...a dying 9v battery. Don't use a fresh 9v battery, or you will shorten the life of the bulb. Find a battery that is roughly putting out 7v - 8.25v. An ol

...rly, yet flicker at something like a 50% duty cycle (on half the time, off half the time) are sometimes caused by low high voltage DC. ...mmed" down using the trim pot. Doing so has the advantage of extending the life of the plasma displays. Measure DC voltage at TP2 as you trim the voltage,

Another tip for prolonging the PC's life is to underclock the CPU. This can be done within the computer's BIOS setti To fix this, cut three rubber mini post grommets in half horizontally to make two small rubber doughnuts and use the six rubber piec

...arming circuit in place for the incandescent lamps (intended to extend the life of the lamps), but when LED bulbs are installed, [[#Feature Lamps Stay On W ...ue in their pinball machines. The idea behind this was to help extend bulb life, since the most stressful thing that could happen to an incandescent bulb's

...y, coils in series will be about the same resistance, so each will see one-half of the available voltage. ...llapse when it turns off. Although normal, it causes pits and shortens the life of the contacts of 1C, which may need to be cleaned with a flexstone file o

...Scanbe', which are poor quality. Masked ROMs are very stable as they start life as all 1's and then the information is programmed by "burning" each selecte #ScanBe sockets. These are well documented to be long past their useful life and should always be replaced.

...less of a strain on the flash lamp. In turn, it is supposed to extend the life of the flash lamp. The smaller value resistor is used as a current limiting ...the A/C relay was to drive twice the amount of coils and flashers by using half the amount of drive transistors. This process is commonly referred to as "

...tors. Simply replacing out of spec capacitors may bring the strobe back to life. ...ary Coded Decimal and is a fancy term for storing a number from 0 - 9 in a half byte of storage (four bits). Using BDC encoding, each byte of memory can st

...essage is an indicator that the checksum of either the 1st half or the 2nd half of that ROM failed. Replace the ROM.<br clear=all> ...eat is dissipated throughout the whole board. This in turn will limit the life expectancy of the other electronic components on the board. Equally, the h

...of a game. Heat damaged or worn out connectors (and they do have a service life) increase electrical resistance, which causes more heat, which causes more ...ly have a mate/unmate life limit. Sanding header pins exhausts all of this life limit.

...omponent. That said, C8's negative pole will be oriented towards the lower half of the board. Well, while you were out having a good time and enjoying life, the poor, aged, neglected battery decided to wreak havoc all over your CPU

...0uf/25V smoothing capacitor at C4. This cap is probably way past it's spec life. Replacing it is advised. While the original capacitor was specified at 18, ...ine batteries. They tend to hold their original 3V for their entire useful life rather than decaying slowly. Once they've been depleted, the 3V power falls

...ttery holder, located on a daughter board that clips to posts on the lower half of the board. This approach mostly eliminated the PCB damage caused by batt ''Step 10: Power smoothing capacitors at end of life''

...ost commonly used is vinegar, since it is an acid. Diluting the vinegar to half strength by adding an equal amount of water (50/50) is a good idea to preve ...e as an on-off switch and can also operate anywhere in between on and off (half on) depending on input voltage. If the TTL device cannot quite drive the g