Sharp MZ-700 iv1Z, Troubleshooting procedure, Phenomenon @ Program can not be saved, signal is on

Models: MZ-700

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iv1Z 700

I

iv1Z 700

Troubleshooting procedure

Phenomennon CD: Motor and tape do not rotate, when the PLAY button is pushed.

 

 

 

Motor fai lure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check if the SW302

 

Check if M+

 

 

interlinked with the

 

and M·5Vare

NO

PLAY pushbutton is

 

in supply.

active.

 

 

 

 

 

 

 

 

 

 

OV: when SW is on +5V: when SW is off

Check +5V on REMOTE terminal @.

Check the +5V input

voltage. Check R3009.

OK

Check the motor lead wire (REM) and the motor transistor (2S0468)

Check if voltage is on to the base of the remote control transistor of the CPU board.

Phenomenon @: Program can not be saved

 

 

NO

 

 

 

 

itch fai lure

Check if the SW3OO1 interlinked

 

 

 

with the R EC pushbutton is

 

 

 

properly operating when the

 

 

 

REC pushbutton is pushed.

 

 

heck if signa

 

 

 

Check if +5V on Cl) .

 

 

is on from the

 

OK

terminal !J).

 

 

 

 

NO

OK

Check the CPU board.

Check if the signal is on to the base of 03002.

Failure of SW3OO1. Check R30OS.

OK

signal is on

to the recor

OK ding head.

Failure of the recordl playback head.

Contact failure

in SW3OO1. Check

03001 and 03002.

NO

Check if voltage is on to the erasure head.

Phenomenon ®: Program can not be loaded or resulted in error

 

 

 

OK

 

 

Check if a

 

 

 

 

waveform is

 

 

 

 

on the terminal

 

 

 

 

 

 

 

 

 

®.

 

 

 

 

Check the

 

 

 

1...----1+5V

 

 

 

NO

 

supply.

 

 

No waveform with

 

 

 

 

too much noise.

 

 

Check if the erasu re head should have been inactive due to failure of SW3001 .

Check peripheral components around 03003 and for azimuth maladjustment of the record I

NO playback head.

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Sharp MZ-700 manual iv1Z, Troubleshooting procedure, Phenomenon @ Program can not be saved, signal is on, waveform is