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一、数字显示器不亮检修如数字显示器不亮,多数是由供电电路引起的,也有数字显示电路和数字显示器损坏的情况。数字显示器不亮时,先测量VEP07249A电路板上IC6501(MN15823)的(17)脚是否有-30V电压。如有,应检查IC_(6501)和插座P_(6501)如无-30V电压应检查VJBO1168电路板上Q_(1101)的集电极是否有-48V电压。如果无-48V应检查VJB01168电路板上的R_(1103)(1.5Ω)电阻是否损坏,如有-48V,应测量Q_(1101)的基极是否有-30.7V电压,如有-30.7V电压,应检查
First, the digital display does not light Overhaul such as digital display is not bright, most are caused by the power supply circuit, there are digital display circuit and digital display damage. When the digital display is off, first measure whether the (17) pin of the IC6501 (MN15823) on the VEP07249A board has a -30V voltage. If yes, check IC_ (6501) and outlet P_ (6501). If there is no -30V voltage, check if the collector of Q_ (1101) on VJBO1168 board has -48V voltage. If there is no -48V should check VJB01168 circuit board R_ (1103) (1.5Ω) resistance is damaged, if -48V, should be measured Q_ (1101) base whether there is -30.7V voltage, if -30.7V voltage Should be checked