Panasonic M3500 camera power supply circuit principle and fault maintenance |
| Time£º2014-06-08 07:22:28 Source£ºNetwork Author£ºUnknown Clicks£º1706 |
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MQwservice manual download site
[example 3] failure phenomenon Electrical switches, lights ablaze is destroyed, the whole machine protection no action. MQwservice manual download site
Analysis and maintenance according to the experience of such failures mostly in some way other than the + 5 v output voltage is not normal. Maintenance, first for each test point voltage, and electrical switches, use of automatic protection power supply open to shut down briefly gap and measuring various voltage in turn. Test, they found 18 v and output power + + 9 v is always zero, and other various such as - 8 v voltage on instantaneous has a rise and fall process. Carefully check, found that the pulse transformer T1001 disconnection between and (5) (4) the feet, make T1001 (3), (4) feet no pulse voltage output. After replacing T1001 (ELL04T032R), the machine back to normal. MQwservice manual download site
[example 4] failure phenomenon battery 10 minutes the alarm off, put the battery in the normal machine, the supply quantity of four, and only two in the machine. MQwservice manual download site
Analysis and maintenance through inspection, confirm the machine battery is good. Multimeter is used to inspect the main circuit board p voltage, socket (2) feet off of 12.6 V, boot measurement of 11.5 V, fell to 1.1 V, instructions from the battery compartment between reed and p socket has contact resistance is too large. After careful inspection, found that the battery in the dc power input jack on off switch contact oxidation. After the contact processing clean, commissioning again, everything is ok.MQwservice manual download site
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