Panasonic WJ-HD300 Series free download

File name WJ-HD300 Series Circuit Explaination.pdf

WJ-HD300 series Circuit Explanation This circuit explanation is explained about WJ-HD316. (Refer to the Block Diagram of WJ-HD316.) The WJ-HD316 consists of 7 major circuits such as Video board, FMX board, Main board, DLE board, ATA board, Front board and Power board. The major operation of the each board is, 1. Video board : To convert the video input signal to the digital video component signal. 2. FMX board: To distribute the digital video input signal to the Recording circuit, Network circuit or Monitor circuit. 3. Main board: To control the FMX output signal to write on the HDD and playback from the HDD. 4. DLE board: To compress the digital component video signal to write on HDD and expand HDD playback signal to the digital video component signal. 5. ATA board: Interface board between Main board and HDD. 6. Front board: Switch board of front keys. 7. Power board: Power supply board. The following diagram shows the signal flow among each board. DLE Video FMX Main Rear Panel Front Panel Front ATA HDD 1 Video Signal Flow 1. Video board. WJ-HD316 has 16 channels video input connectors. From CH1 to CH8 have a capability which controls a pan/tilt and lens of the combination camera directly. As for the CH9 to CH16, any camera can be connected to it but no capability of direct camera control. CH1 camera signal enters to IC100 (Amplifier). The output signal from IC100 is supplied to pin12 of IC101 (Data mix). One of the output signals from pin28 of IC101 is supplied to pin8 of IC100 to be used for the loop through signal. The other output signal from IC101 pin28 enters to pin5 of IC103 (Selector) and to Q107, IC102 (Sync Detector). When CH1 camera signal exists, the CH1 camera signal will be output from pin4 of IC103. If CH1 camera signal does not exist, a dummy sync (DSYNC1) which is supplied from FMX board will be output from IC103. The selection of either CH1 or DSYNC1 is made by SDET signal. The selected signal is passed through Q109-Q111 then enters to pin55 of IC170 (Decoder). In IC170, CH1 camera signal is converted to Y, C, R-Y, B-Y digital signal (DEC1-VDATA(0-7)). It is supplied to CN1800 to be transferred to FMX board. In case of the direct camera control by WJ-HD316, when you operate pan/tilt control key on the front panel, the control command (DVOUT-5V) is supplied to pin11 of IC101. Then it is supplied to the camera through coaxial cable. As for the other input channels CH2 ­ CH8, the proces