BOOKKEEPING FUNCTIONS-KEYBOARDDISPLAY UNIT (KDU)Note: When using the Keyboard Display Unit, the information shown on the replay display should beignored. .The bookkeeping functions and their keypad entry codes are as follows:Code Function� Total number of coins inserted into the coin chute.1 A Telephone in - Number of credits put onto the game by the Remote Control Unit.2A Telephone Out - Number, of credits removed using the reset button.2B , A Total in (Coins and Replays) .3A Total actual number of games played.4A Total Out ( Replays).5A Number of times Double or Noth ing'was played.6A Number of Double winners.After the data in all the bookkeeping registers has been recorded they can be set to zero by entering the key code 99B. Note: The coin-in count (OA) is not affected by the reset code.The game retains in its memory the number of coins dropped through the coin chute, totalnumber of coins and credits (replays) and the actual number of games played. In addition, occurrencesof certain features specific to the game model will be recorded to aid in monitoring overall revenueperformance. This data is stored in U45 and U49 on the MPU module (non-volatile CMOS RAMS) .A storage battery, connected to U45 and U49 only, provides power whenever the game is turned off(see schematic W-1222, sheet 1, left side). The battery is charged through C R29 while the game is on.Since the standby (quiescent) power consumption of U45 and U49 is in microwatts, a fully chargedbattery can maintain storage of bookkeeping and score information for months. If memory retentionis affected, check for battery failure and/or a leaky charging diode.B. MECHANICALMeters located if! the cabinet, near the front door,monitor the following functions:1. Coins ln2. Total In3. Total Out4. Telephone In5. Telephone OutAll coins passing through the coin chute.All credits and coins played.Credits won on the game.Credits awarded from the Remote Control Unit.Credits, removed from the game with the Reset button on the RemoteControl Unit.The Telephone in and out meters are in parallel with the meters in the Remote Control Unit andduplicate the information on them.12