A dance hall in the strong vibration of the bass, all channel speaker's voice appears fault pause; tone light, all analysis and maintenance of: according to the analysis of the fault phenomena, resulting in three reasons for the failure: one is a common channel signal line contact is not good; the second is the equipment system of a certain level of electrical source plug bad contact; the third is the poor audio equipment shockproof function or circuit contact undesirable phenomena. Inspection, the inspection common signal channel transmission line, everything is normal; inspection system all signal processing equipment of the power plug are good contact; with the microphone and DVD pilot, everything is normal.Hu2service manual download site
Focus on examination of the double CD playing disc machine, respectively play the CD player on the left and right two disc audition, found in the pilot left CD, total competition put right CD is much better, repeat play observation and conclusion. The fault in the cd. And cut off the power supply, remove CD: open the machine of the CD cover, observe the inside of the circuit elements and two CD what is the difference between, found the dust attached to the left and right two CD player laser head lens.Hu2service manual download site
Fluff brush gently lens cleaning dust, installed the pilot, left CD trial when the fault has disappeared. When the trial right CD, fault still. Re open double CD cover, find the right disc CD player laser head of the laser output power is in charge of regulating potentiometer, tries to increase laser output power (with screwdrivers alignment tiny potentiometer by clockwise slowly rotating 1 / 12), try to put the right CD, troubleshooting.Hu2service manual download site
Description: CD is the main use of song and dance hall audio playback device, due to long-term use, did not pay attention to maintenance, which caused the accumulation of dust in the laser lens, reduces the emission intensity of laser and optical receiving rate, impact to capture light signal, especially under the strong shock of sound, tracking servo signal appear slow, resulting in sound signal loss and come to a halt fault.

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