KENWOOD KDCZ738
Manual de Servicio

KDC-X959/Z939,Z738,Z838W
COMPONENT DESCRIPTION
q SWITCH UNIT (X16-169X-XX)
Ref.No. IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC9 IC10 Q4 Q5 Q6 Q8 Q9 Component Name SI-3033LSA-TL TC74HC4050AFT RS-171 BA3830F M25P20 MX23L3213TI109 IS61LV641615TI 703107AGJ121 TC7WT126FU TC7SH08F Application/Function 3.3V AVR Buffer Remote sensor IC BPF IC Flush ROM ROM SRAM Panel MI-COM. Buffer WE/WR control signal generation Key illumination Red SW Key illumination Green SW Operation/Condition/Compatibility +3.3V Output 5V � 3.3V logic level shifting BPF for the spectrum analyser indicator For custom display data of the indicator For display data of the indicator For display data of the indicator 3V � 5V logic level shifting AND gate When a base goes Lo, Q4 is turned on, and key illumination Red is lit. When a base goes Lo, Q5 is turned on, and key illumination Green is lit. When Q8's base goes Hi, Q6 is turned on, and OEL 16V power line is supplied to OEL module. When a base goes Lo, Q9 is turned on, and key illumination Blue is lit.

DTC123JUA DTC123JUA CPH3105 OEL+B SW DTC114EUA or UN5111 DTC123JUA Key illumination Blue SW

q ELECTRIC UNIT (X25-927X-XX)
Ref.No. IC1 IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC10 IC11 IC12 IC14 IC16 IC20 IC21 IC23 IC24 IC25 Q1 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 Q15 Component Name UPD703033GFA14 UPD703033GFA15 TDA7407 M5237ML TDA7560 TDA7401 ICL7660SIBA TC74HC02AF NJM4565M-TE2 NJM4565M-TE2 NJM4565M-TE2 NJM4565M-TE2 TDA7479D S-80837ANNP BA3121F BA3129F SI-8033JD LT1930A BR24C02F-W 2SD2375 2SA1037K Application/Function System MI-COM. System MI-COM. E-VOL. & N.C. MPX AVR IC Power IC High pass filter & Non-Fader volume -9V AVR Mute logic Op. amp. Op. amp. Op. amp. Op. amp. RDS decoder Reset IC Isolation amplifier Switched op.amp. MECHA. AVR OEL AVR EEPROM CD servo AVR SW 5V Operation/Condition/Compatibility For KDC-X959/Z939, Z838W For Z738 IC is combined with Q4, and it works as the error detection, the Q4's driver. HPF(Front/Rear output), LPF, Non-Fader switching and volume function DC/DC converter, -9V output for pre-output amplifier 2-input NOR x 4 Amplifier for the spectrum analyser and generation of Vref.(1/2Vcc) voltage Amplifier for the front pre-outputs Amplifier for the non-fader pre-outputs Amplifier for the rear pre-outputs When BU 5V voltage is less than 3.7V, IC outputs Lo. AUX inputs isolation amplifier Input switching with AUX inputs and CD inputs DC/DC converter, +5V output for CD mechanism adapted for MP3/WMA DC/DC converter, +16V output for OEL module AVR for CD mechanism servo operation, +7.5V output. While a base goes Lo, SW 5V is supplied to the microprocessor peripheral circuits. Q4 is combined with IC3, and it works as the power supply of +8.0V output. When Q5's base goes Hi, Q6 is turned on, and A.+8V AVR is working. When Q8's base goes Hi, Q7 is turned on, and A.+8V AVR, CD servo AVR and A.+10V AVR are working. For PAN5V on/off switching. When a base goes Lo with panel attached to the set, Q9 is turned on, and PAN5V is supplied to the panel. When Q11's base goes Hi, AVR outputs +9V. When Q12's base goes Hi, Q13 is turned on, and OEL/Illumination AVR is working. When a base goes Lo, Q14 is turned on, and control pulse signal is outputted. When vehicle small lamps turn on, Q15's base goes Hi, and it is turned on. 3

2SA2057 A.+8V AVR DTC144EUA or UN5213 A.+8V AVR SW DTA124EUA or UN5112 DTA124EUA or UN5112 SW14V DTC124EUA or UN5212 2SB1427 2SA2057 2SC4081 DTC124EUA or UN5212 DTA124EUA or UN5112 DTA123JK or KRA105S DTC144EUA or UN5213 PAN5V SW OEL/Illumination AVR OEL/Illumination AVR SW EXT. AMP CON. SW Dimmer detection SW