-40-1. No drive signals supplied at motorsCheck drive signals at pins 1 and 2 of K16M for focusmotor, pins 3 and 4 of K16M for zoom motor and pins 1and 2 of K16L for lens shift motor on Power Board.Check drive signals at pins 2 and 10 of ICs IC1611,IC1602 and IC1601.Check ICs IC1611, IC1602 and IC1601 and peripheral cir-cuits. Check motor drive power supply (9VA).2. No drive signals supplied at motor drive ICs.Check drive signals at pins 5 and 6 of ICs IC1611, IC1602and IC1601. They are supplied from pins 4 and 5 for focusdrive, pins 6 and 7 for zoom drive and pins 9 and 10 forlens shift drive of IC1641 D/A control IC.3. No drive signals output from CPU.The motor dive signals are supplied from IC801, mainCPU, via the IIC bus control lines.4. No key switch signals input to CPU.Check signals at pins 118 to 120 of IC801 when pressingthe key buttons. Check key buttons.102 3029791065 118119120623IC1602ZOOMMOTOR DRIVE IC801MAIN CPU102561334IC1601LENS SHIFTMOTOR DRIVECONNECTBOARDMMZOOMMOTORLENS SHIFTMOTOR K16L54K8TK16RK9AK9BK9CK8JK8SK68ACONTROL BOARDMAIN BOARDDRIVE BOARDFOCUS +FOCUS -LENS +LENS -ZOOM + SCLSDAZOOM -TOP_DET. CENTER_DET.9 8 79 8 7FOCUSZOOMLEVEL +LEVEL -102 545612IC1611FOCUSMOTOR DRIVEIC1641D/AMOTOR CONTROLMFOCUSMOTOR K16M1 3IC1801I/OEXPANDER13 14Logic Table of IC1611/IC1602/IC1601Input Output Operation5 6 10 2H L L H Forward driveL H H L Reverse driveH H L L BrakingL L - - Stand byLens Motor ProblemsTroubleshooting