Sharp MZ-700 manual Iv1Z

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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