MODEL ER-A320 SERVICE MANUAL - diagramas.diagram...

10. Buzzer circuitCHAPTER 5. TEST FUNCTIONVDDR58IC2CPU/RESETC1910U/50V+1KQ16C3198R591KC1822U/16V+D241SS133VCC1. Start of test functionThe following key operation is required in the SRV mode to start thetest.XXXX ST/RESETC110.1µMODE SWITCHTest commandMaster reset is required when the system is to be started for the firsttime.This circuit sounds buzzer with the BUZ signal from the CPU.2. List of test commands11. Reset circuitNo. Test contents Key operations1 Mode switch test 1 ST2 Keyboard test XXXX02 STIC2CPU/RESETC1910U/50V+Q16C3198R581KVDDR591KC1822U/16V+D241SS133VCC3 Display and Buzzer test 3 ST4 Standard Drawer test 4 ST5 Option Drawer test 14 ST6 Printer test 5 ST7 RAM test 6 STNOTE-1: Test message is printed on the journalNOTE-2: The contents of the totalizer and the preset values are noterased by the test./RESETMODE SWITCH3. Test functionC11M1041) Test No. 1: Mode switch testKey operation1 STThe reset signal is formed with VCC and VDD. The /RESET signal isalso outputted when the mode switch is at SRV position.Then, turn the mode switches in the following order.In the mode switch test, turn the switch rhythmically.MODE: SRV PGM VOID OFF OP X/Z REGMGR X1/Z1 X2/Z2 SRVDISPLAY: (1) (2) OFF (3) (4)(5) (6) (7) (0)DescriptionAs the mode switch position number is displayed, check the number.TerminationThe test can be terminated when the mode switch is turned to theSRV side from other position.Termination print at normal endTermination print and error