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Sharp MZ-700 manual Abnonnal increase of output ripple, ~v1Z - 70C

Models: MZ-700

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~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)

Page 27

Image 27

Sharp MZ-700 manual Abnonnal increase of output ripple, ~v1Z - 70C

Contents

MZ-1TOl MZ-1POl PERSONAL COMPUTERMZ-700 SHARP SERVICE MANUAL1. SPECIFICATION INS. DEL key MZ-700Volume MZ-700 Front viewt,J~ H rn~PO~UP t\.04. SYSTEM DESCRIPTION Page ~ ~r I ------JrHBLK~ as a2 a\,1Z-700 IV? 7ce Y r ~ P7~ P1 ~ P5Memory Management VRAM Memory Management4-3. Memory mapped I/O $EOOO - $EOO8 Page Page c Keyboard controDer 5-1. Data recorder MZ-lT01 Cassette specificationBlock diagram 5. DATA RECORDERsignal is on iv1ZTroubleshooting procedure Phenomenon Program can not be loaded or resulted in errorHead Mechanical adjustmentsCollector of transistor 03003 Digital voltmeter Test tape MTT-113 Pinch rollerCassette recorder waveforms 6mv~3 7~~ I ++6+ ?6. COLOUR ENCODER MZ-700 7. MICRO COlOR GRAPHIC PRINTER~ kot...... .-J Page MZ--700 A ROP ------r-----I PI,B+---i---5,us uiylMZ-700 8. POWER SUPPLYPage ~v1Z - 70C 2-4. Abnonnal increase of output ripple74LS04 74LS32 74LS86 74LSOO74LS02 74LS14741774LS427472 74LS125A74LS14574LS24674LS273 74LS16674LS174 74LS176MZ-700 10. CIRCUIT DIAGRAM & PARTS LAYOUTr---- ~ c erRESET r.----JEMR~ 1t!tccsEO~CS II1W WR csnMW =r=t----4Page LJ~~~¥..~.~.~M~.~A~,J 4O~- BACKt,Y.I ~WIT~sOO ~l--r~-I-? ~ ~~37..0Page A. L IPower unitr%~~~ ~--~~U/III ffO~~n r~ C3001Motor P.W.B. unit I\fIIvLf j ~2S046ecEI02IAC-33A ~===---------~NC=3~2~M ~3~O~-t==~~~1-~~r-1I~~~t===~==== PII 12~8~~~~~~~~Page MZ-700 PARTS LIST & GUIDE MZ·700 rn CPU Unit Exteriorsrn CPU U~~t Exteriors 20 PMZ·700 MZ·700 Printer Unit ExteriorsDESCRIPTION IlJ CPU Unit Electronic ComponentsMZ·700 PARTS CODEMZ·700 3J CPU Unit Electronic ComponentsPrinter Control PWB Elecronic Components OtherDESCRIPTION Power Supply UnitMZ-700 PARTS CODE12----t--~~~ ID Power Supply Unit2016 MZ..700Key Board Unit ~7~13MZ·700 DESCRIPTION Ca ssette UnitMZ·700 PARTS CODEDESCRIPTION Cassette UnitMZ·700 PARTS CODE4~1 ~ CASSETTE UNITMZ·700 MZ-700 IndexPARTS CODE PARTS CODE NO. PRICE NEW PARTPARTS CODE MZ·700~T2EY332J MZ·700SHARP CORPORATION 11-185121\0 71931-100 S!MMZ700!lT&1POl 203 - 250887!720g0700QSHARP MZ-700