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ezmservice manual download site
When connect the camera power switch by IC6004 7 feet out of the "power on" high level instruction, via QR6008 to Q1006 at the base after the inverter, make Q1006 conduction, 12 v voltage is added to IC1001 3303 GIF (122 bytes). Meanwhile, IC6004 end feet out of the camera power on the high level of instruction directly to IC10013304. GIF (118 bytes), IC1001 with working conditions. When IC1001 work normally, the pet-name ruby, 3305 GIF (110 bytes) feet out around 1.0 Vp - p pulse signal, respectively by Q1003, D1004, L1007, C1008 and Q1001, D1002, L1002, C1003 step-down switching circuit after decompression, the two groups get 5 V and 3.5 V dc voltage. Step-down switch voltage regulator circuit working principle is: when IC1001 pet-name ruby feet out of the pulse high level to Q1003 at the base of the turn-on, the diode D1004 cut-off, input dc voltage by the Q1003 and L1007 C1008 charging, the current increase in L1007 energy storage. When IC1001 pet-name ruby send pulse low level to the foot Q1003 base, Q1003 cut-off, induce left is right L1007 negative voltage, load and fly-wheel diode D1004 inductance of energy released, maintaining the output voltage of 3.5 V. 5 v output voltage of the other works the same all the way. ezmservice manual download site
IC10013306. GIF (113 bytes) feet out of the pulse signal by Q1004 drive pulse signal amplification of 15 vp - p, after pulse transformer T1001 conversion in T1001 subprime (3), (4), 6 foot out different amplitude of pulse voltage, respectively, the conclusion of the rectifier filter circuit and the respective + 18 v, and three groups - 8 v + 9 v dc voltage; Controlled the 12 v power supply also directly after Q2101, D1202 voltage sent 9 v voltage. ezmservice manual download site
In order to ensure the various output voltage stability, the corresponding negative feedback voltage regulation measures. The 5 v voltage by VR1001 equal pressure after sampling, feedback back IC1001 3307. GIF (124 bytes) feet; 3.5 V voltage after VR1002 equable pressure sampling, feedback to IC1001 feet; + 18 v, three groups - 8 v and + 9 v voltage is a path from 9 v voltage VR1003 after sampling, uniform pressure feedback to IC1001 3308 GIF (119 bytes), within the IC1001 adjust their output pulse width, to ensure the stability of the output voltage of all stripes.
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