Kenwood KDC-MP538U Service Manual
Hide thumbs
Also See for KDC-MP538U:
- Instruction manual (92 pages) ,
- Service manual (16 pages) ,
- Training manual (52 pages)
Advertisement
Quick Links
CD RECEIVER
KDC-MP538U/MP6039/MP6539U
KDC-W6041U/W6141UY
KDC-W6541U/W6641UY
KDC-X592
SERVICE MANUAL
KDC-MP538U : Panel assy (A64-4436-11)
KDC-MP6539U : Panel assy (A64-4441-11)
KDC-W6141UY : Panel assy (A64-4440-11)
KDC-W6641UY : Panel assy (A64-4438-11)
* Cover
(F19-1475-04)
* Escutcheon
* Screw set
(N99-1790-05)
(B07-xxxx-xx)
Mounting hardware assy
(J21-9716-03)
* Screw (4x16)
(N84-4016-48)
* Depends on the model. Refer to the parts list.
KDC-MP538U
KDC-MP6539U
KDC-W6141U
KDC-W6641U
* Compact disc
(W01-1723-05)
* Carrying case
(W01-xxxx-xx)
* DC cord
(E30-6428-05)
* Screw set
Lever
(N99-1757-15)
(D10-7012-04) x2
© 2008-4 PRINTED IN JA PAN
B53-0631-00 ( N ) 429
KDC-MP6039 : Panel assy (A64-4442-11)
KDC-W6041U : Panel assy (A64-4439-11)
KDC-W6541U : Panel assy (A64-4437-11)
KDC-X592 : Panel assy (A64-4435-11)
TDF SPARE-PANEL
MAIN UNIT NAME
TDF PARTS No.
KDC-MP538U
Y33-2950-61
KDC-MP6039
Y33-2950-65
KDC-MP6539U
Y33-2950-64
KDC-W6041U
Y33-2950-63
KDC-W6141UY
Y33-2950-63
KDC-W6541U
Y33-2950-62
KDC-W6641UY
Y33-2950-62
KDC-X592
Y33-2950-60
* DC cord
* Remote controller assy (RC-547)
(E30-6671-05)
(A70-2085-05)
* Plastic cabinet assy
(A02-2755-13)
This product complies with the
KDC-MP6039
KDC-W6041U
KDC-W6541U
KDC-X592
TDF NAME
TDF-MP86D
TDF-MP6039
TDF-MP6539U
TDF-W6041U
TDF-W6041U
TDF-W6541U
TDF-W6541U
TDF-86DX
Battery
(Not supplied)
This product uses Lead Free solder.
RoHS
directive for the European market.
Advertisement
Related Manuals for Kenwood KDC-MP538U
Summary of Contents for Kenwood KDC-MP538U
- Page 1 KDC-MP538U/MP6039/MP6539U KDC-W6041U/W6141UY KDC-W6541U/W6641UY KDC-X592 SERVICE MANUAL © 2008-4 PRINTED IN JA PAN B53-0631-00 ( N ) 429 KDC-MP538U : Panel assy (A64-4436-11) KDC-MP6039 : Panel assy (A64-4442-11) KDC-MP538U KDC-MP6039 KDC-MP6539U : Panel assy (A64-4441-11) KDC-W6041U : Panel assy (A64-4439-11) KDC-MP6539U...
- Page 2 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 BLOCK DIAGRAM J421 SPECTRUM ELECTRIC UNIT (X34- ) AUX IN ANALYZER IC700 Q331 USB u-COM J431 CN201 A322 Q321,322 Q401-406 USB5V J401 AM+B LX BUS CONNECTOR PRE OUT IC451 FRONT-END MUTE BACK (F/R SW) Q407,408 USB I/F IC501...
- Page 3 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 COMPONENTS DESCRIPTION ● ELECTRIC UNIT (X34-588x-xx) Ref. No. Application / Function Operation / Condition / Compatibility IC11 Audio8V REF Power Supply Outputs 1.27V. IC21 Power supply for IC700. (USB μ-COM) IC61 SW REG Power supply for D5V. (To USB and PANEL)
- Page 4 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 COMPONENTS DESCRIPTION Ref. No. Application / Function Operation / Condition / Compatibility Q321,322 AM+B SW When Q322’s base goes Hi, AM+B is output. Q331 For spectrum analyzer. Q401~406 Pre-out Mute SW When a base goes Hi, pre-out is set to mute.
- Page 5 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 MICROCOMPUTER’S TERMINAL DESCRIPTION ● SYSTEM μ-COM : IC601 on X34- (ELECTRIC UNIT) Truth Value Pin No. Pin Name Application Processing / Operation / Description Table WIRED REMO Remote control signal input Pulse width detection RDS QUAL RDS decoder QUAL input S SYS DATA Data from system μ-COM to SOC...
- Page 6 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 MICROCOMPUTER’S TERMINAL DESCRIPTION Truth Value Pin No. Pin Name Application Processing / Operation / Description Table H: Possible to rewrite in ROM correction ROMCOR DET ROM correction writing request (I2C opened) EPM input while writing Possible to rewrite in Lo at the start-up...
- Page 7 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 MICROCOMPUTER’S TERMINAL DESCRIPTION Truth Value Pin No. Pin Name Application Processing / Operation / Description Table ACC DET ACC detection ACC detected: L, No ACC: H BU detected: L, No BU or Momentary power BU DET BU detection...
- Page 8 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 MICROCOMPUTER’S TERMINAL DESCRIPTION ● PANEL μ-COM : IC1 on X16- (SWITCH UNIT) Truth Value Pin No. Pin Name Application Processing / Operation / Description Table REMO Remote control signal input Pulse width detection Not used Output L fi xed...
- Page 9 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 MICROCOMPUTER’S TERMINAL DESCRIPTION Truth Value Pin No. Pin Name Application Processing / Operation / Description Table LED CONT TRI I/O Triangle LED luminescence SW H: LED ON, Hi-Z: LED OFF 49,50 Not used Output L fi xed I/O Data transmission and reception for ROM correction...
- Page 10 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 TEST MODE ● How to enter the test mode ● TUNER Setup adjustment mode specifi cation Press and hold the [FNC] and [EJECT] keys and reset. 1. Use [FM] / [AM] key to select TUNER band. (While ”----” is being displayed, power can be ON for 30 2.
- Page 11 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 TEST MODE ● K3I forced switching displayed. (In this step, use Local Seek ON/OFF setup to change the destination of the writing.) Every time when [6] key is pressed in tuner FM mode, switched in the following order: AUTO→Forced WIDE Seek Stop Level Adjustment (Manual) →Forced MIDDLE→Forced NARROW→AUTO.
- Page 12 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 TEST MODE ● AUDIO adjust mode ● MENU • Press the [AUD] key briefl y to enter the audio adjustment • Press the [FNC] key briefly to make the multi-function mode. display and press the [ ] key briefl y to enter the MENU.
- Page 13 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 TEST MODE ● Special displays while all lights are on Example of detail display: Display in the case of E2PROM Write When all lights are on with STANDBY source, if the fol- MENU lowing keys are pressed, the following messages are dis-...
- Page 14 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 TEST MODE Table 1 - Version & Service information display mode Table 2 - CD information display mode Key pressed briefl y: Version is displayed I2C communication condition and CD mechanism error log (Display) C0724WK__SYS1.23 display (Remote (Display) STYPE: xx_PAN1.11...
- Page 15 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 TEST MODE mation & Service Information & DC offset Error Detection (Note) In this mode, the DC error detection display, “Pro- Information Clear Mode, or DC offset Error Detection In- tect” is not shown. formation Clear Mode. ● Clearing DC offset error detection information •...
- Page 16 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 TEST MODE ● Security ● How to clear the programmable security code (KDC-MP538U/X592) How to enter the forced POWER ON mode While “_ _ _ _” is being displayed, while simultaneously 1. While “_ _ _ _” is being displayed, press [ ] key for 3 pressing [FNC] key and [ ] key, press [RESET] button, seconds or longer while pressing the [AUTO] or [TI] keys.
- Page 17 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 INSTALLER MEMORY SPECIFICATIONS At specialists (or specialty stores), when the installer sends • The contents read out by the call key shall be refl ected the vehicle back to the user, they may make the store-rec- only to the current source at the time→EQ curve is ommended audio confi...
- Page 18 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 PC BOARD (KDC-MP538U/MP6039/W6041U/W6141UY/X592) (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) SWITCH UNIT (BLUE LEDs) SWITCH UNIT (BLUE LEDs) X16-633x-xx (J76-0503-12) X16-633x-xx (J76-0503-12) TP48 CP21 CP20 TP71 CP12 CP17 CP13 CP15 X16-633x-xx X16-633x-xx Ref. No. Address Ref. No. Address CP16...
- Page 19 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 PC BOARD (KDC-MP6539U/W6541U/W6641UY) (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) SWITCH UNIT (RGB LEDs) SWITCH UNIT (RGB LEDs) X16-634x-xx (J76-0504-12) X16-634x-xx (J76-0504-12) CP12 CP17 CP13 X16-634x-xx X16-634x-xx Ref. No. Address Ref. No. Address CP16 ILL+B TP29 TP28 TP26 TP11...
- Page 20 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 PC BOARD (COMPONENT SIDE VIEW) ELECTRIC UNIT X34-588x-xx (J76-0502-12) IC501 TH500 C516 R506 J401 R510 D506 J431 D502 R442 C443 C506 D141 R507 D144 R141 R145 D432 C512 C513 C511 C514 R124 R125 D423 Q101 R126 Q141 Q145...
- Page 21 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 R506 R510 IC11 CN161 CN201 X34-588x-xx Ref. No. Address Ref. No. Address IC11 D202 D201 C201 D211 IC21 IC211 IC61 L201 IC71 C211 R213 C213 R732 R730 R744 R211 IC101 R717 R728 R718 IC211 X701 IC301 R727 IC21...
- Page 22 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 PC BOARD (FOIL SIDE VIEW) ELECTRIC UNIT X34-588x-xx (J76-0502-12) TP17 TP16 C510 C509 TP18 TP15 TP12 TP14 TP19 TP10 C515 C152 R135 R128 C121 Q123 R153 R129 C457 C458 R102 TP30 C465 C466 C143 R454 TP23 TP700 TP702...
- Page 23 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 TP407 TP405 TP401 TP403 TP406 TP402 TP423 TP404 C408 C411 C403 C407 C412 C404 TP421 R423 R424 R403 R409 R404 R410 R415 R416 TP422 TP420 X34-588x-xx Ref. No. Address TP344 TP501 C470 C459 C460 R454 C471 D321 W304...
- Page 24 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 PC BOARD (COMPONENT SIDE VIEW) CD PLAYER UNIT X32-6130-00 (J76-0495-12) R261 R216 C104 R281 X32-6130-00 Ref. No. Address Refer to the schematic diagram for the values of resistors and capacitors.
- Page 25 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 PC BOARD (FOIL SIDE VIEW) SGND S7.5V CD PLAYER UNIT LO/EJ DRVMUTE MOTOR X32-6130-00 (J76-0495-12) SPDL+ R288 LOE-SW 8-SW SRAM MRST PIO0 AMUTE SLD- SLD+ LOAD A.GND EJECT SPDL- BUCK R240 R289 BU1.5V C101 R241 R246 R231 D1.5V...
- Page 26 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 PRE OUT J431 AUX IN REAR SW/REAR ELECTRIC UNIT J401 J421 J401 (X34-588x-xx) FRONT TP423 FRONT J401 R426 TP420 REAR WOOFER 5L I/F C424 0.01 TP421 D421 D433 D439 D422 D431 D434 D423 D432 ESD2 FRONT REAR R403...
- Page 27 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 BU5V TP500 C506 1u16 R507 RESET IC 4.3K C521 IC602 C614 IC501 VOUT 0.01 R660 5.0V 0-4.4V C505 R601 2.2K WIRED REMO R602 R505 POWER TP603 2.2M RDS QUAL R604 47K S SYS DATA/CD SI R101 R637 47K...
- Page 28 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 TP615 TP613 BU5V BU5V Q121 Q121 D121 R122 R121 BU DET SW PON5V PON5V Q122 R123 IC603 D123 CORRECTION SURGE Q122 DET SW Q123 R126 ACC DET SW 100K D124 Q123 C614 TP611 TP609 R135 R134 0.01 Q142,143...
- Page 29 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 to DC CORD F1 10A (F52-0023-05) TP16 SPISOMI SPISIMO NC31 SPINSS 3.3V iPod R758 100K CLOCKOUT Q122 AUTHENTICATION ROSC NC33 R757 47K SURGE COPROCESSOR 3900u16 MODE2 DET SW NC34 3.3V R756 100 NC35 I2CSDA R128 IC750 NC36 NC14 3.3V...
- Page 30 BU3.3V • DC voltages are as measured with a high im- pedance volt me ter. Val ues may vary slight ly KDC-MP538U/MP6039/MP6539U/W6041U/W6141UY/W6541U/W6641UY/X592 (1/2) due to vari a tions between in di vid u al in stru- ments or/and units. X34-588x-xx (5/5)
- Page 31 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 SWITCH UNIT (X16-63xx-xx) CP18 5.0V CP11 LED CONT UNDER/RED FL LAT 5.0V or 0V FL BK CP13 3.3K LED CONT RTY2/BLUE ROTRY2 CW CP19 ROTRY2 CCW 100P 5.0V or 0V CP14 3.3K ROTRY1 CW ROTRY1 CCW 5.0V 5.0V VCC2 5.0V...
- Page 32 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 131 x 23 DOT 5.5V FILAMENT VOLTAGE(-) TP30 5.0V 8.8V CP21 0.01 TP91 100P TP92 DGND ROM CORRECTION PAN5V-1 FLGND FL+B PAN5V Top on FL (L) TOP (L) BLUE LED SW TRIANGLE RED LED SW R21 360 R22 620 R23 390 4.7K...
- Page 33 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 CD PLAYER UNIT (X32-6130-00) 4CH BTL DRIVER 1.5V POWVCC1 TP203 POWGND1 R233 TP31 SLIN R207 TP204 SPDL- VO1- LDIN TP32 BIASSW TP33 SPDL+ VO1+ C20 33P TP34 TP28 EJECT R20 180K VO2- TP55 TP26 R27 9.1K LOAD VO2+...
- Page 34 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 3.3V R233 R287 16.934MHz TP44 FCS+ 0.022 TP47 TRK- TP46 1.9V TRK+ 2200P TP45 DPU1 FCS- (X92- ) 0.033 0.033 TP84 TP71 2.1V TP40 OPTICAL TP41 PICKUP TP72 87.7kHz 1.8V 2.5V 16.934MHz 1.5V 2.1V SS3 1 1.7V TP42 88.8kHz...
- Page 35 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 EXPLODED VIEW (CD MECHANISM) DPU1 DFPC1 (X32) : N09-4460-15 φ M1.6x6.0 : N09-6317-05 M1.7x2.5 : N09-6004-15 M2x2 : N09-6007-15 2x5(BLK) : N09-6051-15 φ 1.6 WASHER : N19-2163-04 M2x2 : N39-2020-48 2x3.5 : N09-6108-15 φ : N09-6155-15 φ Parts with the exploded numbers larger than 700 are not supplied.
- Page 36 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 EXPLODED VIEW (UNIT) Batteries for RC1 DME1 : N24-3015-48 : N84-2005-48 : N80-2008-43 : N83-3005-48 : N83-3005-48 (X34) : N83-3016-48 (X34) WH151 : N86-2606-48 W321 : N80-3008-48 : N83-3010-43 (X34) (X34) A322 (X34) (X16-) IC750 (X34) IC61 (X34) 272 (X34- : ELECTRIC UNIT) On bottom of IC61 and IC750 there is a soldering part each.
- Page 37 2.2UF ✽ H54-4337-03 ITEM CARTON CASE CK73FB1C105K CHIP C 1.0UF K : KDC-X592 K1 : KDC-MP538U M1 : KDC-MP6539U M2 : KDC-MP6039 Indicates safety critical com po nents. E1 : KDC-W6541U E2 : KDC-W6641UY E3 : KDC-W6041U E4 : KDC-W6141UY...
- Page 38 CHIP R 100K J 1/10W CK73GB1H103K CHIP C 0.010UF K K : KDC-X592 K1 : KDC-MP538U M1 : KDC-MP6539U M2 : KDC-MP6039 Indicates safety critical com po nents. E1 : KDC-W6541U E2 : KDC-W6641UY E3 : KDC-W6041U E4 : KDC-W6141UY...
- Page 39 C142 CK73GB1A105K CHIP C 1.0UF C143 CK73GB1H104K CHIP C 0.10UF K : KDC-X592 K1 : KDC-MP538U M1 : KDC-MP6539U M2 : KDC-MP6039 Indicates safety critical com po nents. E1 : KDC-W6541U E2 : KDC-W6641UY E3 : KDC-W6041U E4 : KDC-W6141UY...
- Page 40 CK73GB1A474K CHIP C 0.47UF C752 CK73GB1C104K CHIP C 0.10UF E2E3E4 K : KDC-X592 K1 : KDC-MP538U M1 : KDC-MP6539U M2 : KDC-MP6039 Indicates safety critical com po nents. E1 : KDC-W6541U E2 : KDC-W6641UY E3 : KDC-W6041U E4 : KDC-W6141UY...
- Page 41 1.8K J 1/8W R161 RK73EB2E102J CHIP R 1.0K J 1/4W K : KDC-X592 K1 : KDC-MP538U M1 : KDC-MP6539U M2 : KDC-MP6039 Indicates safety critical com po nents. E1 : KDC-W6541U E2 : KDC-W6641UY E3 : KDC-W6041U E4 : KDC-W6141UY...
- Page 42 CHIP R J 1/10W R654 RK73EB2E102J CHIP R 1.0K J 1/4W K : KDC-X592 K1 : KDC-MP538U M1 : KDC-MP6539U M2 : KDC-MP6039 Indicates safety critical com po nents. E1 : KDC-W6541U E2 : KDC-W6641UY E3 : KDC-W6041U E4 : KDC-W6141UY...
- Page 43 J 1/10W M1 R728 RK73GB2A223J CHIP R J 1/10W KK1E1 K : KDC-X592 K1 : KDC-MP538U M1 : KDC-MP6539U M2 : KDC-MP6039 Indicates safety critical com po nents. E1 : KDC-W6541U E2 : KDC-W6641UY E3 : KDC-W6041U E4 : KDC-W6141UY...
- Page 44 R756 RK73GB2A101J CHIP R J 1/10W E2E3E4 D201,202 AVRL1613R3FTA VARISTOR K : KDC-X592 K1 : KDC-MP538U M1 : KDC-MP6539U M2 : KDC-MP6039 Indicates safety critical com po nents. E1 : KDC-W6541U E2 : KDC-W6641UY E3 : KDC-W6041U E4 : KDC-W6141UY...
- Page 45 FRONT-END UNIT KK1M1 DTA124EUA DIGITAL TRANSISTOR A322 X86-4030-11 FRONT-END UNIT K : KDC-X592 K1 : KDC-MP538U M1 : KDC-MP6539U M2 : KDC-MP6039 Indicates safety critical com po nents. E1 : KDC-W6541U E2 : KDC-W6641UY E3 : KDC-W6041U E4 : KDC-W6141UY...
- Page 46 MACHINE SCREW (M2X2) N09-6051-15 TAPTITE SCREW (PT2X5) N19-2163-04 FLAT WASHER (1.6X6X0.25) K : KDC-X592 K1 : KDC-MP538U M1 : KDC-MP6539U M2 : KDC-MP6039 Indicates safety critical com po nents. E1 : KDC-W6541U E2 : KDC-W6641UY E3 : KDC-W6041U E4 : KDC-W6141UY...
- Page 47 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 PARTS LIST CAPACITORS 2 2 0 • Capacitor value CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc.
- Page 48 Stereo separation (1kHz) ..........40dB Treble .............10kHz ±8dB Preout level / Load (CD) AM tuner section KDC-X592 ..........4000mV/10kΩ KDC-MP538U ..........2500mV/10kΩ Frequency range (10kHz space) ....530kHz – 1700kHz Preout impedance .............≤ 600Ω Usable sensitivity (S/N = 20dB) ......28dBμ (25μV) Auxiliary input CD player section Frequency response (±1dB) ......
- Page 49 KDC-MP538U/MP6039/MP6539U/ W6041U/W6141UY/W6541U/W6641UY/X592 SPECIFICATIONS (Models for destination “M”) FM tuner section USB Interface (KDC-MP6539U) Frequency range USB Standard .............USB1.1/2.0 200kHz space .........87.9MHz – 107.9MHz Maximum Supply current ........... 500mA 50kHz space ........87.5MHz – 108.0MHz File System ............. FAT16/32 Usable sensitivity (S/N = 30dB) ....9.3dBf (0.8μV/75Ω) MP3 decode ..
- Page 50 Installation Size (W x H x D) .....182 x 53 x 155mm WMA decode .... Compliant with Windows Media Audio Weight .................1.40kg AAC decode ..........AAC-LC “.m4a” fi les KENWOOD follows a policy of continuous advancements in development. For this reason specifi cations may be changed without notice. DANGER: Please do not look at the laser beam directly during re pair or operation check.