Kenwood KDC-3028 Service Manual

Cd receiver

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Instruction manual (108 pages)

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Page 1 B53-0246-00 ( N ) 609 SPARE TDF PANEL MAIN UNIT NAME TDF PARTS No. TDF NAME KDC-3028 Y33-2150-68 TDF-53DB KDC-328 Y33-2150-67 TDF-53D PANEL ASSY PANEL ASSY KDC-3028 (A64-3630-12) KDC-328 (A64-3486-12) SCRL SCRL AUTO AUTO KDC-3028 KDC-328 C.S. C.S. DISP DISP DISP...
Page 2: Block Diagram
KDC-3028/328 BLOCK DIAGRAM 3 7 63 1515 0 ELECTRIC UNIT (X34-) L506 FM AGC AM+B Q501 Q351,352 PRE OUT AM AGC PRE MUTE IC10 FM (J/K) : 1800mV CD/MD 3600mV FM (E) 1372mV CHANGER AM (J/K) 600mV 3600mV SERVO MPX OUT...
Page 3: Components Description
KDC-3028/328 COMPONENTS DESCRIPTION 3 7 63 1515 0 ELECTRIC UNIT (X34-3390-1x) Ref. No. Application / Function Operation / Condition SYSTEM µ-COM System control. POWER SUPPLY DC5V x 1, 7.8V x 1, 8.0V x 1, 10.2V, P-CON, P-ANT output. POWER IC Signal amplifier.
Page 4: Daughter Unit (X89-2690-10)
KDC-3028/328 COMPONENTS DESCRIPTION 3 7 63 1515 0 Ref. No. Application / Function Operation / Condition L.P.F. (LOW PASS FILTER) 2nd low pass filter for audio signals. APC (AUTOMATIC POWER CONTROL) LD power control. DIGITAL +5V SW “ON” When P. ON signal goes “L”.
Page 5: System Μ-Com : Ic1 On X34- (Electric Unit)
KDC-3028/328 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 SYSTEM µ-COM : IC1 on X34- (ELECTRIC UNIT) Pin No. Pin Name Application Processing Operation DCERR DC offset detection input LINE MUTE Phone detection TEL MUTE : Below 1V ROTARY CW...
Page 6 KDC-3028/328 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 Pin No. Pin Name Application Processing Operation 40~42 PS1-1~PS1-3 Power supply control output Refer to “POWER IC CONTROL” on the TRUTH TABLE KEY CDEJ Eject key L : Eject PON CD...
Page 7: Truth Table
General models commercially-designated as pure KENWOOD brand (Initial value) Initial value setting General models commercially-designated as pure KENWOOD brand (CRSC is changed) Multi-Path Band-Path Gain = 12dB, Multi-Path Charge Current = 0.4µA, De-Emphasis = 75µS POWER SUPPLY IC (IC3) CONTROL SW1 (Pin No.
Page 8: Cd Mechanism Μ-Com : Ic2 On X32- (Cd Player Unit)
KDC-3028/328 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 CD MECHANISM µ-COM : IC2 on X32- (CD PLAYER UNIT) Pin No. Pin Name Application Processing Operation Traverse drive output (PWM output). Spindle motor drive output (PWM output). No connection. Multipurpose PWM output.
Page 9 KDC-3028/328 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 Pin No. Pin Name Application Processing Operation 8EJE SW 12EJE/SDET SW Loading-end detection / H : Loading-end detection LOE/LIM SW Pick-up inner circumference detection. L : Pick-up inner circumference detection 45~49 No connection.
Page 10 KDC-3028/328 TEST MODE 3 7 63 1515 0 How to enter the test mode PRESET • When pressed for less than 1 second : CD EJECT While simultaneously press PRESET “1” key and PRESET “3” “5” key number display key, press “RESET” button.
Page 11: Special Mode
KDC-3028/328 SPECIAL MODE 3 7 63 1515 0 Security DC offset error detection confirmation mode • How to enter the forced POWER ON mode Confirmation mode : While depressing PRESET “3” key and PRESET “6” key While “– – – –” is being displayed, while simultaneously simultaneously, press on the “RESET”...
Page 12 KDC-3028/328 ADJUSTMENT 3 7 63 1515 0 After replacing the following parts, adjust as follows. 1st AM MIX / 2nd AM MIX ADJUSTMENT ADJUSTMENT POINT : L508 (1st AM MIX) / L509 (2nd AM MIX) REPLACED PARTS ADJUSTMENT ITEMS VOLTAGE VALUE CHECK POINT : S-METER check land (X34-) Ref.
Page 13 KDC-3028/328 PC BOARD 3 7 63 1515 0 (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) SWITCH UNIT SWITCH UNIT X16-2910-11 (J76-0040-32) X16-2910-11 (J76-0040-32) L 13942296513 PAN5V D108 ILL+B D103 REMO CNDET CP13 CP12 X16-2910-11 X16-2910-11 Ref. No. Address Ref. No. Address...
Page 14 KDC-3028/328 PC BOARD (COMPONENT SIDE VIEW) 3 7 63 1515 0 ELECTRIC UNIT X34-3390-1x (J76-0075-12) W312 W351 W352 W335 13 11 12 8 4 3 2 W251 9 10 6 C256 C257 C255 C258 W346 C303 W317 W306 L520 W340...
Page 15 KDC-3028/328 3 7 63 1515 0 W423 W398 W405 W406 L 13942296513 C119 W370 W394 W371 W402 W372 W373 R313 W396 W397 W421 W422 X34-3390-1x Ref. No. Address W404 IC15 W376 BU5V S151 u163 Refer to the schematic diagram for the values...
Page 16 KDC-3028/328 PC BOARD (FOIL SIDE VIEW) 3 7 63 1515 0 ELECTRIC UNIT X34-3390-1x (J76-0075-12) W252 R254 R253 R273 R252 R257 R251 R271 R456 C201 L 13942296513 R454 C118 R438 R114 R437 C113 C116 R134 R312 R135 C153 R181 R151...
Page 17 KDC-3028/328 3 7 63 1515 0 DAUGHTER UNIT X89-2690-10 (J76-0057-12) W252 R229 R230 R226 R225 W101 R253 C521 R222 R221 C525 L600 D503 L521 C516 R594 C604 C626 W823 C527 C503 C625 C504 C605 D506 R543 W826 R506 C518 R504...
Page 18 KDC-3028/328 PC BOARD (COMPONENT SIDE VIEW) 3 7 63 1515 0 CD PLAYER UNIT X32-5750-00 (J76-0059-12) L 13942296513 X32-5750-00 Ref. No. Address u163 Refer to the schematic diagram for the values of resistors and capacitors.
Page 19 KDC-3028/328 PC BOARD (FOIL SIDE VIEW) 3 7 63 1515 0 CD PLAYER UNIT X32-5750-00 (J76-0059-12) SLED DRVMUTE SPDL SPDL LOE/LIM A.GND A.+8V C100 R100 /MRST /MSTOP SLED OUT /MUTEL /LOAD L 13942296513 /MUTER SLED IN /EJECT BU.5V Vref 2...
Page 20 KDC-3028/328 3 7 63 1515 0 DAUGHTER UNIT (X89-2690-10) ELECTRIC UNIT (X34-339x-xx) (X89-2690-10) 2-PREOUT DESTI- DAUGHTER UNIT MODEL NAME MUTE C627 NATION X89-2690-10 X34- C221 KDC-3028 100P R229 R221 10u16 KDC-328 Q221 KDC-MP5029 CN91 KDC-W5031/Y 4.7K KDC-W531Y MUTE CF51 CF52...
Page 21 KDC-3028/328 3 7 63 1515 0 L602 D203 C201 L509 0.01 3,43 CF53 0MHz 10.700MHz MUTE LOGIC CF54 450.000kHz 4.5V ∗ R431 AM : 8.0V FM : 8.1V 4.3V AM : 4.1V FM : 5.2V C512 AM : 0V AM : 4.2V 10u16 5.0V...
Page 22 KDC-3028/328 X89-269- 3 7 63 1515 0 CN91 ∗ REAR LX BUS ∗ TP339 TP338 TP341 TP340 ∗ ∗ TP404 C333 C334 680P 680P Q351 R335 R336 PRE OUT S-METER MUTE TP408 Q351 Q352 C565 Q352 PRE OUT MUTE ∗...
Page 23 CONTROL • DC voltages are as measured with a high u163 impedance voltmeter. Values may vary R141 R140 R139 R138 R137 R136 R135 slightly due to variations between indi- FL+B vidual instruments or/and units. KDC-3028/328 (1/2) X34-3390-1x (4/4)
Page 24 KDC-3028/328 3 7 63 1515 0 SWITCH UNIT (X16-291x-xx) (3G/1GB/2G) (1GA) ∗ REMOTE SW5V CONTROL col2 R73 33 R74 22 R75 22 col4 col1 TP16 KEY MATRIX L 13942296513 D110 DISP LOW PANEL MID PANEL TR15 ILL D GND TP14...
Page 25 • DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations between individual instruments or/and units. KDC-3028/328 (2/2) X16-2910-11 (2/2)
Page 26 KDC-3028/328 3 7 63 1515 0 CD PLAYER UNIT (X32-5750-00) RFENV D.GND C34 0.1 4.80V C32 0.1 BU+5V 470P 470P L.P.F. 3.10V 1.25V 2.40V 3.10V 3.10V 1.70V IREF R100 C100 8EJE SW 3.10V 1000P PLLF2 12EJE/SDET SW PLLF 3.84V 4.7K 4.80V...
Page 27 KDC-3028/328 3 7 63 1515 0 CAUTION : For continued safety, replace safety critical compo- nents only with manufacturer’s IOP+ IOP- recommended parts (refer to parts R7 3.6K list). Indicates safety critical com- ponents. To reduce the risk of 3.3K...
Page 28 KDC-3028/328 EXPLODED VIEW (CD MECHANISM) 3 7 63 1515 0 DPU1 L 13942296513 DFPC1 (X32) φ : N09-4460-05 : N09-4472-15 M1.7x8.0 M1.7x2.5 : N09-6004-05 M2x2 : N09-6007-05 u163 φ : N09-6051-05 2x5(BLK) : N19-2163-04 1.6 WASHER : N39-2020-46 M2x2 : N09-6108-05 M2x3.5...
Page 29: Exploded View (Unit)
KDC-3028/328 EXPLODED VIEW (UNIT) 3 7 63 1515 0 DME1 : N80-2006-48 : N80-2008-43 : N83-3005-48 : N84-2005-43 : N84-2606-43 : N80-3010-48 : N83-3005-48 : N83-3020-48 : N86-2610-48 : N86-2606-48 L 13942296513 (X34) (X89-) (X34-) (X16-) u163 Depends on the model. Refer to the parts list.
Page 30: Parts List
PROTECTION BAG (180X300X0.03) RK73GB2A101J CHIP R J 1/10W H54-3363-13 ITEM CARTON CASE (KDC-328) K2 R51-53 RK73FB2B471J CHIP R J 1/8W H54-3417-13 ITEM CARTON CASE (KDC-3028) K3 RK73EB2E681J CHIP R J 1/4W R55,56 RK73FB2B301J CHIP R J 1/8W J19-5205-03 HOLDER J19-7049-03...
Page 31: Switch Unit (X16-2910-11)
J 1/10W C77,78 CK73GB1C104K CHIP C 0.10UF C100-102 CK73GB1H102K CHIP C 1000PF S1,2 S68-0863-05 PUSH SWITCH E : Europe K : North America K2 : KDC-328 Indicates safety critical components. M : Other Areas W : Without Europe K3 : KDC-3028...
Page 32 C589 CK73GB1C104K CHIP C 0.10UF C502 CK73GB1H152K CHIP C 1500PF C590 CK73GB1H392K CHIP C 3900PF E : Europe K : North America K2 : KDC-328 Indicates safety critical components. M : Other Areas W : Without Europe K3 : KDC-3028...
Page 33 CHIP R J 1/4W RK73GB2A104J CHIP R 100K J 1/10W R303 RK73EB2E101J CHIP R J 1/4W E : Europe K : North America K2 : KDC-328 Indicates safety critical components. M : Other Areas W : Without Europe K3 : KDC-3028...
Page 34 CHIP R J 1/10W R565 RK73GB2A394J CHIP R 390K J 1/10W S151 S74-0822-05 MICRO SWITCH E : Europe K : North America K2 : KDC-328 Indicates safety critical components. M : Other Areas W : Without Europe K3 : KDC-3028...
Page 35 2SD1858 TRANSISTOR D13-2154-04 GEAR UMC2N DIGITAL TRANSISTOR D13-2155-04 WORM Q151 DTA114YUA DIGITAL TRANSISTOR D13-2156-14 GEAR E : Europe K : North America K2 : KDC-328 Indicates safety critical components. M : Other Areas W : Without Europe K3 : KDC-3028...
Page 36: Mechanism Assy (X92-5090-00)
SEMS (TAPTITE SCREW) (PT2X6) T42-1066-04 DC MOTOR (SPINDLE) T42-1067-04 DC MOTOR (LOADING) DPU1 X93-2010-00 OPTICAL PICKUP ASSY u163 E : Europe K : North America K2 : KDC-328 Indicates safety critical components. M : Other Areas W : Without Europe K3 : KDC-3028...
Page 37 KDC-3028/328 PARTS LIST 3 7 63 1515 0 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 38: Specifications
D/A Converter ..............1 Bit Spindle Speed ........500rpm~200rpm (CLV) L 13942296513 Wow & Flutter ........Below Mesurable Limit KENWOOD follows a policy of continuous advancements Frequency Response ......10Hz~20kHz (±1dB) in development. For this reason specifications may be changed without notice.

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