Kenwood KMD 44 Service Manual

Page 4

KM D-44

COMPONENTS DESCRIPTION

.SWITCH UNIT (X13-9700-11)

Ref. No. Component name Application/Function Opera!ion/Condition/Compatibility
|C1 LC75808W LCD driver with key-matrix
|C2 RS-171 Remote control light sensor
Q1 DTA114EK or UN2111 Key-matrix permission SW Ready on key-matrix, ON when the base goes "Lo".
02 2SD2114K Illumination SW(Red) ON when the base goes "Hi".
03 ZSD2114K Illumination SW(Green) On when the base goes "Hi".
Q4 2802412K or 28D601A LCD AVR

.ELECTRIC UNIT (X25-8840-11)

Ref. No. Component name Application/Function Opera!ion/ConditionlCompatibility
|C1 UPD78421GGF531 System Ml-COM.
|02 TDA7407D E-VOL. & N.C. MPX
|03 M5237ML AVR IC AVR IC is combined with 05, and it works as the error

detection, the driver.
|C4 TDA7386 Power IC
|06 LM25958-ADJ MD SERVO AVR A DC/DC Converter wiht the ON/OFF function.
|C7 S-80830ANNP Reset lC "L'l : detection voltage below 3.0V
|08 HD74HC27FP Mute logic 3 input NOR gate x3
[010 TDA7479D RDS decoder
Q1 2804081 or ZSD1819A BU 5V AVR Inverted darlington connection
02 2SB1548(P)or25B1655(E, F) On during BU applied.
03 DTA124EUA orUN5112 .
DTC144EK or UN2213 Audio 8V AVR ON/OFF sw Ad.'° 8V AVR ON/OFF °°mml .
Q4 03 Is turned ON when 04's base goes "HI".
or KRC104S
05 2SB1548(P)or 2881655(E, F) Audio 8V AVR Output voltage 8.3V
Q7 DTC144EUA or UN5213
Q8 DTA124EUA or UN5112 Illumination AVR AVR output is ON when 07's base goes "Hi".
QB 28D1760
Q10 ZSA1037K SW 5V ON when the base goes "Lo".
Q13 ZSB1277(Q. R)
016 DTC114YK or UN2214 P-CON SW Q13 is turned ON when 016's base goes "Hi".
or KRC107S
Q14 2SA1037K Protect Q13 by turning ON when P»CON output is grounded.
Q15 EjléRiiggsor UN2112 FLCON protection Prevents Q14 turning ON during start-up after power ON.
Q17 2SC2412K or 28D601A (Bllfllirjiiizsogower down detection) ON when the base goes "Hi" during BU applied.
Q18 2SC2412K or 28D601A ACC detection ON when the base goes "Hi"during ACC applied.
019 Ejfiéiiggsor UN2112 Mute driver for Audio mute SW ON when the base goes "L0".
020 Ejfgéigjsor UN2213 E-VOL. mute SW E-VOL. is muted when the base goes l'Hi".

021, 22 DTC143TK or UN2216 Audio mute SW Audio pre-outs are muted when the base goes "Hi".
023 DTC114YK or UN2214 SVR SW POWER l0 RESET is activated when the base goes "Hi".
024 DTA114YUAor UN5114 Panel detection SW ON when the base goes "Lo" during the panel closed.

DTCt24EK or UN2212 . , ,. .,.
025 or KRC1038 FM+B SW gilGJErtignlefiflOiggilofi s base goes HI .
026 28B1277(Q.R)

DTC124EK or UN2212 . , ,. .,.
027 or KRC1OSS AM+B SW gil8éjrti:;niiflc:;\lc:v:te:n027 s base goes HI .
028 ZSB1277(Q.R)
029 2804081 or 2SD1819A Composite signal output buffer
030 2804081 or 2SD1819A Noise buffer

DTC144EK or UN2213 System RESET is activated when the panel reset SW
033 or KRC104S RESET SW is pushed
034 2804081 or 2SD1819A DSI driver ON when the base goes "Hi".