Kenwood KDC-5019 Service Manual

Also see for KDC-5019: Instruction manual Instruction manual Instruction manual

Contents

KDC-5019/519/7021/7021Y/8020/B70213COMPONENT DESCRIPTION SWITCH UNIT(X16-154X-XX, X16-1892-7X)Ref.No. Component Name Application/Function Operation/Condition/CompatibilityIC1 LC75808W LCD driver with key matrixIC2 RS-171 Remote sensor ICQ1 DTA114EUA or KRA302 Key permission SW For the key scanning start and the key detection SWQ3 2SC4081 Red LED SW When a base goes Hi, RED LEDs are turned on.Q4 2SC4081 Green LED SW When a base goes Hi, GREEN LEDs are turned on.Q5 2SC4081 VLCD AVR For LCD driver ICQ6 DTA114EUA or KRA302 REMO SW While a base goes Lo, PAN 5V is supplied to the Remote sensor IC.Q7 DTC143ZK Dimmer SW Usually Q7's base goes Hi. When DIMMER mode is selected, pulsewave shape is applied to Q7's base. ELECTRIC UNIT(X25-939X-XX, X25-8762-7X)Ref.No. Component Name Application/Function Operation/Condition/CompatibilityIC1 UPD703033GC139 System MI-COM.IC2 TDA7407D E.VOL & N.C.MPX ICIC3 M5237ML AVR IC IC is combined with Q4, and it works as the error detection, the driver.IC4 TA8273H Power ICHD74HC02FPIC8 or TC74HC02AF Mute logic 2-input NOR x 4or 74VHC02SJIC14 TDA7479D RDS decoderIC15 LB1930M Motor driver ICIC16 S-80837ANNP Reset IC When BU 5V voltage is less than 3.7V, IC outputs Lo.Q1 2SB1548(P) BU 5V AVR While BACKUP is applied, AVR outputs +5V.Q2 2SC4081 or 2SD1819A Q1 and Q2 are inverted Darlington connection.Q3 2SA1576A or 2SB1218A SW 5V While a base goes Lo, SW 5V is supplied to the microprocessorperipheral circuits.Q4 2SB1548(P) A8V AVR Q4 is combined with IC3, and it outputs +8.3V.Q5 DTC144EUA or UN5213 A8V AVR SW A8V AVR ON/OFF controlQ6 DTA124EUA or KRA303 While Q5's base goes Hi, Q6 is turned on, and A8V AVR is working.Q7 DTA124EUA or KRA303 A8V AVR and SERVO +B AVR ON/OFF controlQ8 DTC144EUA or UN5213 SW14V SW While Q8's base goes Hi, Q7 is turned on, A8V AVR and SERVO +BAVR are working.Q9 2SD2375 SERVO +B AVR When Q9's base goes Hi, SERVO +B AVR outputs +7.6V.Q10 2SB1184 ILL +B AVR While Q11's base goes Hi, AVR outputs +10.7V.Q11 2SC4081 or 2SD1819A Works during POWER ON mode with a panel attached to the set.Q12 DTC144EUA or UN5213 ILL +B SW ILL +B AVR ON/OFF controlQ13 DTA124EUA or KRA303 While Q12's base goes Hi, Q13 is turned on, and ILL +B AVR is working.Q14 DTA123JK or KRA105S EXT. AMP CON. SW When a base goes Lo, Q14 is turned on, and control pulse waveformshape is outputted.Q15 DTC144EUA or UN5213 Small lamp detection SW When vehicle small lamps turn on, Q15 is turned on .Q24 DTC114YUA or UN5214 ANT-CON. SW When Q24's base goes Hi, Q25 is turned on.Q25 2SB1277(Q,R) Works during the tuner reception mode.Q26 2SB1277(Q,R) P-CON SW When Q29's base goes Hi, Q26 is turned on .Q29 DTC114YUA or UN5214 Works during POWER ON mode.Q27 2SA1576A or 2SB1218A P-CON. protection SW Protect Q26 by turning ON when P-CON output is grounded.Q28 DTA124EUA or KRA303 P-CON. protection inhibit SW Prevents Q27 tuning ON during start-up after power ON.While BACKUP is applied, a base goes Hi, and Q30 is turned on.Q30 2SC4081 or 2SD1819A BU detection SW When momentary power down has detected, a base goes Lo, andQ30 is turned off.Q31 2SC4081 or 2SD1819A ACC detection SW While ACC is applied, a base goes Hi, and Q31 is turned on.Q32 DTA124EUA or KRA303 Mute driver for L Ch. When BU detection SW or System RESET or MI-COM.'s Pre-mute isQ33 DTA124EUA or KRA303 Mute driver for R Ch. working, a base goes Lo, and Q32 and Q33 are turned on.Q35 DTC124EUA or UN5212 E. VOL mute SW When BU detection SW or MI-COM.'s mute is working, a base goesHi, and Q35 is turned on.Q36 2SC4081 or 2SD1819A Noise buffer