Observe the speaker often irregular "cob, cob" sound, the other is normal. The fault is occasional, phased, recently become frequent, almost always appear. bb9service manual download site
 bb9service manual download site
This is panasonic M15 stopwatch and series of the common fault of the color TV sets, the reason is that audio formats to choose C242 or C243 adjustable capacitance in circuit leakage (beside the level into the block iron shell). For fine-tuning the capacitance can troubleshoot, generally can be substituted for fixed ceramics capacitors, capacity of 10 ~ 20 pf desirable. If the only receive the sound (6.5 MHz) television in China. Removed the two capacitance television can also be used normally. This kind of capacitor leakage phenomenon is also common in other appliances. Such as panasonic G30 C7501 clock correction capacitor on the VCR.bb9service manual download site