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Verfügbare Sprachen
Verfügbare Sprachen
Is the supply voltage of 5V fed to
NO
pin (18) of 15001?
YES
Is the supply negative voltage of
NO
AT-25V fed to pin (16) of IC5001?
YES
Is there 4.0MHz oscillation at pin
NO
(19) and (20) of 1€5001?
YES
Is filament voltage applied
between (1)/(2) and (44)/(45) of
the fluorescent display tube?
Also negative voltage applied
between these pins and GND.
YES
Does the fluorescent display tube
NO
function?
ag
YES
Replace IC5001.
Check ATS5V line.
Check negative voltage line (AT -
25V) and power circuit.
Check FL5001 and IC5001.
Check power circuit and
peripheral circuit of D5005.
Check for cracks on the fluorescent
display tube.
Key-in input is not received.
Does the key switch make good
contact?
YES
Is there a short in the scan outs or
key inputs?
YES
Are pulses received at pins (26)
thru (29) of 1C5001 when the keys
are activated?
YES
Check IC5001, 1C701 and FIP data,
FIP clock, FIP CS and key data.
Check switch contact.
Check all the terminals of IC5001
and switches for poor soldering.
Check lines of key in and scan out.
the receiver when the infrared
Replace 1C701.
remote control is activated?
YES
Check between at pin (1) of
receiver thru pin (15) of 1C701.
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