Differences

This shows you the differences between two versions of the page.

--- fuss:arcade [2020/02/25 16:43] – office
+++ fuss:arcade [2021/11/20 09:19] – office
@@ Line 5: / Line 5: @@
 {{fuss:fuss_arcade_fixing_coin_slot_mechanism.png?512}}
-It may happen that the device does not accept coins anymore, in which case, the matching precision of the device can be decreased by turning the small screw at the back of the device counter-clockwise till the device accepts the coin type.
+It may happen that the device does not accept coins anymore, in which case, the matching precision of the device can be decreased by turning the small screw at the back of the device clockwise till the device accepts the coin type.
+It seems that Allan comparable coin slot mechanisms are susceptible to heat: the more an aracde cabinet stays on, the more likely that the coin slot mechanism will not accept coins anymore and will need to be adjusted for a lower sensitivity (or place frozen raw meat on the coin acceptor).
+====== Coin Acceptor Coin Signal======
+Taking as an example the JY 133A coin acceptor, the second switch marked ''SW2'' on the plastic bevel allows the user to specify the signal length (time) that the coin acceptor will generate when a coin is inserted.
+The switch on the JY 133A is a SPTR switch with three positions corresponding to:
+    * $20ms$ (fast),
+    * $50ms$ (medium),
+    * $100ms$ (slow)
+the descriptions in the manual (if any) mentions some descriptions such as "suitable for amusement machine" but does not explain what the setting is for.
+Imagine an ideal signal plotted in time:
+<code>
+v ^               T
+  |            .......
+  |            .     .
+  |-----+      +-----+      +-----+
+  |     |      |     |      |
+  |     |      |     |      |
++-----+------+-----+------+-----> t
+</code>
+where:
+  * $v$ is the amplitude, binary in this display with a maximum value of $1$ and a minimum value of $0$,
+  * $T$ is the period of the signal or the length,
+Switch ''SW2'' on the JY 133A allows the user to pick the length of the signal generated whenever a coin is inserted. If you load up any game on the arcade, enter the service menu and then pick the input test you can observe the different settings of ''SW2'':
+{{fuss:fuss_arcade_service_menu_inpot_test.png}}
+Inserting a coin should show the ''0'' next to the ''COIN'' label turn into a ''1'' and then turn back into a ''0''. The time it takes for the number ''1'' to be displayed is exactly the value of $T$.
+In other words, if some games do not seem to accept a coin even though the coin acceptor does not display an error, the switch ''SW2'' should be switched to a position with a larger period $T$.