Kenwood DPX701 Service Manual

Also see for DPX-MP7090U: Instruction manual

Contents

4DPX701/701U/701UYDPX-MP7090UCOMPONENTS DESCRIPTION● ELECTRIC UNIT (X34-413x-xx)Ref. No. Application / Function Operation / Condition / CompatibilityIC10 Audio8V Ref Power Supply Output 1.27V.IC80 Switching Regulator Power supply for VFD. (57V)IC100 Reset IC “L” when detection voltage goes below 3.6V or less.IC102 System μ-com Controls FM/AM tuner, the changer, CD/USB mechanism, Panel, volume and tone.IC103 Muting logic IC Controls logic for muting.IC104 EEPROM For instraller’s memory.IC200 Power Control IC Power control switch.IC300 Eelectrical Volume & Source Selecter Controls the source, volume, and tone.IC400 RDS decoderIC451 G-Analyzer Analog gravity sensor.IC500 Spectrum analyzer Buffer AMP & AGC It is buffer and auto gain control for spectrum analyzer.IC600 ±9V AVR Power supply for 5V Pre Out OP-AMP.IC601~603 5V Pre-out AMP Output buffer and gain control.IC750 Power IC Amplifies the front L/R and the rear L/R to 50W maximum.IC800 Audio3.3V Ref Supply Audio3.3V Ref supply to electrical volume and all low pass filters.SVR6.8V Ref Supply SVR6.8V Ref supply to power IC.IC901 Switching Regulator Controller Power Supply for VFD USB5V & Mecha digital.CH1: VFD & USB5V (4.7V), CH2: Mecha digital (DXM-680*: 5V )IC951 Power control IC USB power control switches with over current detection and protection.Q10,11 Audio8V AVR When Q11’s 2 pin goes Hi, A8V AVR outputs 8.0V.Q12 SW14V When Q12’s 2 pin goes Hi, SW14V outputs 14V.Q20,21 B.U.5V AVR While BU is applied, BU5V AVR outputs +5V.Q22,23 SW5V When Q23’s base goes Hi, SW5V outputs +5V.Q30,32 Servo+B AVR When Q32’s base goes Hi, Servo+B AVR outputs 8.5V.Q34 SW14V When Q12’s 2 pin goes Hi, SW14V outputs 14V.Q40,42,45 Panel5V AVR When Q42’s 2 pin goes Hi, Panel5V AVR outputs 5V.Q41,43,44 Illumination AVR When Q43’s 2 pin goes Hi, Ill AVR outputs 10.5V.Q50~52 SW16V (Surge Protection) When Q51’s 2 pin goes Hi, SW16V outputs (BU-0.6)V.Q201 Pre-out mute driver When a base gose Lo, mute driver is turned on.Q202 Acc Detect SW When Q202’s base gose Hi, Acc voltage is detected.Q204 Surge Detect SW When Q204’s base goes Hi, Surge voltage is detected.Q205 B.U Detected SW When Q35’s base gose Hi, B.U voltage is detected.Q206 Ext Amp Control Buffer It is buffer for IC102 output.Q207 Small-lamp Detect SW When Q207’s base goes Hi, Small-lamp is detected.Q208,209 Power Antenna SW When Q206’s base goes Hi, power antenna switch outputs 14V.Q210 Pre-out mute driver When a base gose Lo, mute driver is turned on.Q402,403 AM+B SW When Q403’s base gose Hi, AM+B is outputs.Q500 Spectrum analyzer AGC Controller When this circuit has an excessive input, a return is hung and an output is reduced.Q600~602 Pre-Amp +9V AVR Q600 and 602 works as a differential amplifier, Q601 works as a driver and+9.4V is supplied to OP Amp for Pre-out.Q603~605 Pre-Amp -9V AVR Q603 and 605 works as a differential amplifier, Q604 works as a driver and-9.1V is supplied to OP Amp for Pre-out.