Question about Audio Players & Recorders
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Posted on Jan 02, 2017
SOURCE: Technics SU-V2 keeps cutting out
An amp will cut out if the output protection circuit kicks in. This circuit compares output power against the preset level. Each channel has it's own, independent protector. There are calculations that can be done, but for a novice the rule of thumb is to "never use a speaker with a power rating less than the amp AND a lower impedance than stated". Typically using a 4 ohm load on a 8 ohm system is inviting disaster. Even if the system does not become a smoke generator, you might notice that though "louder", the sound quality is deteriorated. Many "audiophiles" often hook up some combinations of speakers to have "surround" without really understanding that the collective impedance actually changes (generally lowers).
Posted on Jan 21, 2008
SOURCE: Technics SU-V98 No Sound
If I understand your posting correctly, the amp works using the Aux In connectors but not using the VCR1 even when VCR1 is selected correct? If that is the case, there is an internal electronic switching IC (TA9263 I think) that may be defective. This is not a complex repair and can be confirmed easily by any shop that does audio repair. They will trace the incoming signal with an oscilloscope to the IC and see nothing come out when VCR1 is selected. The IC costs less than $10.
Posted on Feb 06, 2009
SOURCE: Technics SU-G75
Th amp may be in protect mode with the outputs turned off to prevent further damage. These units have an AMP-Pac for the final stages that may be defective. The part number is RSN3306. This is the most likely part and can be purchased for about $60. Also inside is another amp-pac for the center and rear speakers (SVI3204B) which runs about $58. Either can cause the symptom you describe.
Posted on Feb 06, 2009
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