NV - M8000 machine, insert the batteries into normal when not connected to the power switch, press out of the box, take positions can pop up normally. By the fault phenomena analysis, preliminary judgment fault in the switch power supply circuit. Disassemble the machine on the right side of the chassis, switch power supply is connected, in the main PCB (VEP03582A) right find switch power supply circuit. Using model 500 multimeter to check the pulse control amplifier integrated block IC1002 (UN102) 2 feet and 15 feet UNREG12V voltage is normal, check the 3, 5, 7, 9, 11 and 13 feet are no voltage output, estimate the fault lies in a IC1001 (including oscillator, reference voltage generator, error amplifier and a comparator circuit, etc.) or 5 v voltage output circuits. Pop-up batteries, using a multimeter to check IC1002 positive and negative resistance to the feet in the right way to find 3, 5 feet red pens and measurement of 1. 2 K Ω, black pens and measurement for 200 K Ω, normal direction, the resistance were 0.3 K Ω, as shown in table 1. This shows IC10023 load, 5 feet output 5 v voltage are open circuit fault. The circuit shown in figure 1. Along the circuit inspection, found inside the integrated circuit protector R1049 has open the damage so connect 5 v voltage output, when the power switch control system microprocessor IC6001 does not work. Switch tube Q1001 base because there was no system control from low level control voltage is in off state. Q1001 collector without SW12V voltage output, cannot offer IC10011 feet (VCC) working voltage, IC1001 doesn't work, IC10023, 5 foot 5 v voltage output, then appear the fault phenomenon. Replace the integrated block circuit protector R1049 (VSF0015A10, device surface nominal ICP - N25) after troubleshooting. wTrservice manual download site
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Panasonic NV - M7, NV - M10, NV - the M1000 and NV - M8000 video camera switch power supply adopts integrated block BA6149LS and UN102 power converter control amplifier and pulse. UN1023, 5 foot 5 v output voltage and 7, 9 feet 9 v output voltage are concatenated a integrated circuit protector. Switching power supply is connected in an instant, 5 v and 9 v load current is big, more common integrated circuit protector internal open circuit phenomenon.

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