Panasonic M series camera with its full functions, easy to use, good quality of video, video tapes can be directly use VHS VCR playback etc, and widely at the county level and the enterprise TV station, school, electronic education, individual wedding camera crews and part of the family, social ownership. At present, this kind of camera has entered the period of maintenance, therefore, the author with panasonic NV - M3500 camera as an example, the system introduces circuit principle and fault maintenance methods of this model. In the circuit and the models of similar NV M3000, NV M9000, NV - M9500, NV - DP200 models and panasonic M series of old type such as NV - M7, NV - the M1000, NV - M8000, such as cameras, also can be reference in this paper, the methods for maintenance. nyLservice manual download site
 nyLservice manual download site
 nyLservice manual download site
Circuit analysis nyLservice manual download site
 nyLservice manual download site
The camera power supply circuit is essentially a dc - dc transform power supply. The circuit will provide the battery or ac adapter for various kinds of pulse voltage 12 v dc voltage conversion, and then through pulse amplification rectifier or after filtering, become more steady or unsteady set of dc voltage for the use of machine. This part of the circuit is the camera malfunction prone areas, is one of the repair. nyLservice manual download site
NV - M3500 camera power supply circuit principle diagram as shown in the appended drawings. This circuit is mainly composed of IC1001 (BA9703K), IC1102 (NJM2903V), T1001 and peripheral components. IC1001 set pulse oscillation circuit, voltage control, detection, protection and other functions in one, is the core of the power circuit components. nyLservice manual download site
When loading within the camera battery, or turn on the ac adapter, 12 v power supply via P1605 socket (2) p (2), sent to the power supply on-off control tube Q1006 emitter and IC1001 attending, 3302. The GIF (123 bytes). One sent directly to the system control circuit IC6010 3 feet, and will not be the stability of the 12 v power supply transformation for the stability of the 5 v voltage supply system control microprocessor IC6004, make the system to control the microprocessor is in working condition.

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