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FLOW CHART NO.12 EV+3.3V is not outputted. Is 5V voltage supplied to the collector of Q1159? Yes Is the voltage of approximately 4V supplied to the base of Q1159? Yes Replace Q1159. No No Check D1108, L1105, C1120 and their periphery, and service it if defective. Check IC1153 and their periphery, and service it if defective.
FLOW CHART NO.13 P-ON+2.5V is not outputted. Is 4V voltage supplied to Pin(1) of IC1151? Yes Replace IC1151. No Check D1105, C1110 and their periphery, and service it if defective.
FLOW CHART NO.14 P-ON+3.3V is not outputted. Is 5V voltage supplied to Pin(1) of IC1152? Yes Replace IC1152. No Check D1108, L1101, C1114, C1116 and their periphery, and service it if defective.
FLOW CHART NO.15 The fluorescent display tube does not light up. No Is 3.3V voltage supplied to Pin(6, 24) of IC1503? Yes Is approximately -24V to -28V voltage supplied to Pin(15) of IC1503? Yes Is there approximately 500kHz oscillation to Pin(26) of IC1503? Yes Are the filament voltage applied between (1) and (24) of the fluorescent display tube? Also negative voltage applied between these pins and GND? Yes Replace the fluorescent display tube. No Check the -FL line and service it if defective. No Check the EV+3.3V line and service it if defective.
Check R1560, IC1503 and their periphery, and service it if defective. Check the power circuit, D1101, D1112, C1106 and their periphery, and service it if defective.
No
1-8-3
E7B71TR
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