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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Hitachi v152F probe 1 trace is flatline no change in trace
Probe 1 doesnt respond to any input..., ch 2 seems ok.
BNC connector was loose and wire to resistor broke loose +Wire from resistor to BNC connector was re soldered nut tightened to BNC, and was working fine. Repair still looks good but ch 1 trace just a flat line can only adjust location of flat line. afraid to adjust internal pots in fear that I am making things worse. Channel 2 is working good responds to testing and calibration and internal pot adjustments. more in depth repair? or More aggressive adjusting? any thoughts? -- +-----------[ SERVER SIGNATURE ]-----------+ | posted via http://www.electrondepot.com | | Web, RSS and Social Media Interface to | | sci.electronics.repair and other groups | +------------------------------------------+ |
#2
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Hitachi v152F probe 1 trace is flatline no change in trace
Don m wrote in message
roups.com... Probe 1 doesnt respond to any input..., ch 2 seems ok. BNC connector was loose and wire to resistor broke loose +Wire from resistor to BNC connector was re soldered nut tightened to BNC, and was working fine. Repair still looks good but ch 1 trace just a flat line can only adjust location of flat line. afraid to adjust internal pots in fear that I am making things worse. Channel 2 is working good responds to testing and calibration and internal pot adjustments. more in depth repair? or More aggressive adjusting? any thoughts? -- +-----------[ SERVER SIGNATURE ]-----------+ | posted via http://www.electrondepot.com | | Web, RSS and Social Media Interface to | | sci.electronics.repair and other groups | +------------------------------------------+ Blown first transistor or corrossion in one of the attenuator switch actions, no pot twiddling will resolve it. Can you swap a screened lead somewhere inside ? like checking left and right amps of a stereo unit |
#3
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Hitachi v152F probe 1 trace is flatline no change in trace
OHMMETER
Does it read a short ? |
#4
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Hitachi v152F probe 1 trace is flatline no change in trace
"Don" m wrote in message roups.com... Probe 1 doesnt respond to any input..., ch 2 seems ok. BNC connector was loose and wire to resistor broke loose +Wire from resistor to BNC connector was re soldered nut tightened to BNC, and was working fine. Repair still looks good but ch 1 trace just a flat line can only adjust location of flat line. afraid to adjust internal pots in fear that I am making things worse. Channel 2 is working good responds to testing and calibration and internal pot adjustments. more in depth repair? or More aggressive adjusting? any thoughts? -- +-----------[ SERVER SIGNATURE ]-----------+ | posted via http://www.electrondepot.com | | Web, RSS and Social Media Interface to | | sci.electronics.repair and other groups | +------------------------------------------+ If it's anything like my V1050, suspect switches. I recently lost all sync on mine. That turned out to be a switch that had gone completely open circuit in both directions, which was odd because it was a nice 'snap action' job. A good squib of switch cleaner that I managed to get into the body of the switch through a small hole formed where the metal 'sides' were folded together, followed by a vigorous 'working' of the switch for 10 seconds, produced a complete cure. Over the years, I've lost various functions on this scope through similarly bad switches. The problem has always been cured with switch cleaner. Arfa |
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