Jvc-TRAINING-2006-Service-Manual电路原理图.pdf
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Jvc-TRAINING-2006-Service-Manual电路原理图.pdf
TRAINING BOOKFOR DIGITAL AMPLIFIER RECEIVER RX-D SERIESBy JSCA ENGINEERING DEPARTMENT JUNE 2006 Second Edit November 2006CONTENT OVERALL POWER SUPPLY POWER PROTECTION DIGITAL AMPLIFIER AUDIO DIGITAL PROCESS VIDEO DIGITAL PROCESS other audio input signals (including HDMI if referenced to ground, it is -38v-50v. The +B and AMP+B voltages are higher in models RX-D402/702, because the output power is higher than RX-D201/202. The +2.5v, DCDC_+12V, DCDC_-B+12V, AMP-B+12V, D+5V_DSP and D+5V_HDMI are not produced in the main PCB. You could check all of the voltages at the indicated (underlined) locations without any extension cable, before or after power is turned on. (See the next page) Some additional DC voltages are produced in Regulate PCB and Master clock PCB.POWER SUPPLY 2/5CN1143. D+5V_DSP4. D+5V_HDMI *(CN130)* The D+5V_HDMI for models RX-D401/402/702 only.The AMP_+/-B switch regulator composes three sections:1. MOSFET switch circuit (the important parts are Q1101/1102, D1107/1108, L1101/1102, C1117/1118)2. Switch driver circuit-IC101.3. DC-DC Converter Control BoardDC-DC CONVERTERCONTROLMOSFET DRIVEIC101+MOSFET SWITCHQ1101/1102 _13 2AMP_B7 CHANNELPOWER AMP AMP_ +/-BLEVELCONTROLCPU IC501SOUND LEVELDETECTPOWER SUPPLY 3/5AMP_ +/-B switch regulator-1aThe CEMF current (via D1107/8) loop after Q1101/1102 switch off.IC101+BAMP_+B -BAMP_-B-B +12V+12VV .f ee db ac kV .o ut _ de t .POWER SUPPLY 3/5
