Sharp MZ-700 manual ~v1Z 70C

Page 27

~v1Z - 70C

2-4. Abnonnal increase of output ripple

In case irregular increase is seen for the output ripple like the one below, it needs to replace C22 and C23 with new ones because they have been fatigued.

-	t
	100mV or less
	t
	(Normal rippla)

Input: AC220 - 240V

Output: 5V,3.75A

Usa oscilloscope

Several hundreds millivolts

(Abnormal ripple)

Image 27

Contents MZ-1TOl MZ-1POl RCB Counter ResetCPU 4KB RAM VideoMZ-700 III $7EOD System DescriptionPhio Ntpl LphiClkn ColrHBLK~ Monitor $DOOOOINH2 INH3 $OFFF $FFFFPHI ResetIN/OUT LPH1~ P7 Memory Management ATB ATB Cgrom RDN Colr NtscLPH1 PAL Ntpl Gate VCC GNDPC· OUT MotorVblnk Dtadr AtrbName SizeOUT2+----TO CPU INT SW3002 Iv1Z Rewind PlaybackFast ForwardAWl Cvideo VideoHsync Vsync CsyncMicro COlOR Graphic Printer ALE XTAL1 XTAL2INT PsenColour Plotter Printer Control LSI VDDProg PI,B Power Supply ~ \ ~v1Z 70C 74LSOO74LS02 74LS147417 74LS166 74LS174 74LS176 Circuit Diagram & Parts Layout ~--l Thri IkopI I I I 4O~- Back ~l--r ~-I-? VIiIT IPower unit FfO~ Lf j EI02IAC-33A ISi§====t============I~~=====~==~================~YD Page Parts List & Guide Rn CPU Unit Exteriors Rn CPU U~~t Exteriors ~18 IlJ CPU Unit Electronic Components 3J CPU Unit Electronic Components Power Supply Unit ID Power Supply Unit ~7~13 Ca ssette Unit Cassette Unit Cassette Unit MZ·700 Index Parts Code Parts Code Sharp