Kenwood KDC-222S, KDC-3023, KDC-222, KDC-2094YG, KDC-2094YA Service Manual

...
©
2002-11 PRINTED IN JAPAN
B53-0004-00 (N)3379
COMPACT
OFF
KDC-222
CRSC
AMEAUTOADJCLK
AUD
45Wx4
COMPACT
OFF
KDC-2024S
MONO
AMEAUTOADJCLK
AUD
45Wx4
COMPACT
DIGITAL AUDIO
RDMLOUD REPSCAN
OFF
KDC-XXXX
CRSC
AMEAUTOADJCLK
AUD
50Wx4
CD MD-Changer Control
M. RDM
COMPACT
RDMLOUD REPSCAN
OFF
KDC-2094
MONO
CLK
AUD
45Wx4
WIDE BAND
DIGITAL AUDIO
DIGITAL AUDIO
DIGITAL AUDIO
Depends on model. Refer to the parts list
AMEAUTOADJ
Panel assy (A64-2867-02): KDC-222 (A64-2868-02): KDC-222S
Escutcheon (B07-3060-02): KDC-222 (B07-3022-02): KDC-222S
Panel assy (A64-2878-02): KDC-2024SA/SG/SYA/SYG
Panel assy (A64-2870-02): KDC-2023 (A64-2873-02): KDC-3023
Escutcheon (B07-3001-02): KDC-2023 (B07-3022-02): KDC-3023
Panel assy (A64-2884-02): KDC-2094YA/YG
Escutcheon (B07-3001-02): KDC-2094YA/YG
Escutcheon (B07-3001-02): KDC-2024SA/SG/SYA/SYG
DC cord (E30-4784-05)
Mounting hardware assy (J21-9716-03)
DC cord(ISO) (E30-4790-05)
Plastic cabinet assy (A02-1486-13)
Lever (D10-4589-04)x2
Screw set (N99-1719-05)
Screw set (N99-1610-15)
Antenna adaptor (T90-0523-05)
CD RECEIVER
KDC-2023 KDC-2024
SA/SG/SYA/SYG KDC-2094YA/YG KDC-222/S KDC-3023
SERVICE MANUAL
CD mechanism operation description is not in this sarvice manual. Please, refer to sarvice manual X92-4030-0x (B51-7867-00).
CD mechanism extension cord : WO5-0618-00
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
2

BLOCK DIAGRAM

1200mV
1200mV
CD : 3600mV CH : 3600mVAM(E) : 855mV
FM(E) : 1372mV
FM(J,K) : 1800mV AM(J,K) : 600mV
CHANGER
KEY MATRIX
WITH
LCD DRIVER
LCD
REMOCON
MI-COM
CD
ANT
AM AGC
FM AGC
DECODER
RDS
RESET IC
EEP-ROM
TUNER,MPX & E-VOL.
SUPPLY IC
SW5V
SERVO
P-ANT
P-CON
POWER
MUTE LOGIC
DET
ACC
BU DET
MUTE
PRE
POWER IC
SP
ACC
UP
BACK
OUT
OUT
PRE
IC1
DATA H
MUTE
DATA C
REQ H
CH-CON
AUDIO OUT
CLK
REQ C
RST
BACK UP
BU5V
IC2
SW5V
LO/S
RST
LOE/LIM
MO
LO/EJ
STOP
MUTE
8EJE
SDA
SCLK
AUDIO OUT
12EJE
Q501
Q502
AM+B
FM+B
AM AGC OUT
IC6
CH CD
SERVO BU5V
A8V
TUNER OUT
BU5V
IC11
IC12
IC10
FM AGC OUT
A8V
SW2
SW1
ILLUMI
VCC
BU5V
AUDIO+B
AM+B
FM+B
BACK LIGHT
KEY ILLUMI
Q51,55
SW5V
Q50
SERVO
BU5V FM+B
AM+B
A8V
P-CON
P-ANT
IC8
Q20
Q10
IC7
MUTE
Q223,224
IC4
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
3
SWITCH UNIT (X16-1460-xx/2370-12)

COMPONENTS DESCRIPTION

Ref.No.
Application/Functions Operation/Condition/Compatibility
IC1 LCD driver & key matrix IC2 Remote Sencer
Q1 Key scan start When Q1 base goes Lo, key scan start.
ELECTRIC UNIT (X25-9600-xx/9612-7x)
Ref.No.
Application/Functions Operation/Condition/Compatibility
IC1 System control µ-com System µ-com IC4 Power amplifire E-Vol output encoder power amplification for speaker. IC7 Power supply (Multi AVR) -
When a pin 1, 2, or 13 is "H", MUTE turns on
IC8 MUTE Logic When a pin 3, 4, or 5 is "H", P-AMP mute turns ON.
Changer is RESET when a pin 9, 10, or 11 is "L". IC10 Tuner & E-Vol. FM/AM tuner & stereo decoder & E-Vol. IC11 Power on reset When B.U. 5V voltage is less than 3.5V, power reset. IC12 E2P-ROM Writing and read-out of adjustment data for a tuner
Q10 B.U. detector BU on (base "H") : Collector "H" Q20 A.C.C detector ACC ON (base : "H") : Collector "L" Q40 MUTE driver Base "L" : Mute on (collector "L") Q50 SW 5V Base "L" : SW5V on Q51 SERBO AVR control Pin 2 "H" : Serbo on (pin 4 "H") Q55 SERBO AVR Base "H" : Serbo on
Q70 Surge detector Base "H" : Surge detect Q101 DSI driver Base "H" : DSI on Q102 PANEL 5V SW Panel attch : PAN5V on
Q223,224
MUTE Base "H" : Mute on Q501 AM RF amplifire Base "H" : Gain UP Q502 FM RF amplifire Gate "H" :Gain UP
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023

MICROCOMPUTER'S TERMINAL DESCRIPTION

4
SYSTEM MICROCOMPUTER uPD780058GCxxx (X25 : IC1)
Pin No. Name I/O Description Processing Operation
1 TDF DET I Panel detection H:Panel detached L:Panel attached 2 8EJE SW I
H:Eject is completed
Except 8cm CD model:always output L 3 NC O Not used (out put L) 4 Avss
H:Panel detached L:RESET 5 L-RST O LCD driver RESET 3 normal H , Power off L
When 7seg model,output L 6 L-CE O LCD driver selection
H:Select (panel communication)
When panel attached,output L 7 AVREF1 8 NC Not used (connected to 9pin) 9 IC10-DATA I/O IC10,E2PROM data communication 3 non communication : H
10 IC10-CLK O IC10,E2PROM clock communication 3 non communication : H
Non communication : H
11 L-DATAL I Data input from the LCD driver When panel detached : L
3 Pull down on X25 unit,Pull up on X16 unit
12 L-DATAS O Data output to the LCD driver When panel detached , output L 13 L-CLK O Clock output to the LCD driver When panel detached , output L 14 R-DATA I Data input from the RDS Except RDS model : output L 15 R-QUAL I Quality input from the RDS Except RDS model : output L 16 CH-DATAC I Data input from the changer (new 5L) Except changer model : output L
17 CH-DATAH O Data output to the changer (new 5L)
When non communication ,last data keeping
Except changer model : output L
18 CH-CLK I/O Clock input/output with the Changer (new 5L)
Check the old and new
Except changer model : output L
19 CH-REQH O Request output to the changer (new 5L)
L:Requset
Except changer model : output L
20 NC O Not used (output L) 21 AFS O
Noise detection time constant switching terminal
H:Normal L:FM/AM seek and AF search
3 (When tuner SRC auto zero , L)
22-24 NC O Not used (output L)
25 CH-CONT O Changer control
H:Changer on L:Changer off
Except changer model : output L
26 TYPE REF O 5V lines output for destination setting H:During destination reading 27 SD I Tuner SD input H:Station detected 28 NC O Not used (output L) 29 TYPE2 I Destination type selection terminal 2 Refer to destination type list. 30 TYPE1 I Destination type selection terminal 1 Refer to destination type list. 31 TYPE0 I Destination type selection terminal 0 Refer to destination type list. 32 TUNER-TYPE1 I Destination available/genuine model rool off H:genuine model 1 L:available model 33 Vss1 34 TUNER-TYPE0 I
Destination available/genuine model noise cancel
H:genuine model 0 L:available model
35 MUTE O Mute (E.Vol,Preset) control
H:mute on L:mute off
Power off after that 15 second L
36 M-DATA I/O Data input/output with the CD mechanism 3 non communication : H 37 M-CLK O Clock output to the CD mechanism 3 non communication : H
When adjustment = H
38 ADJ O Tuner lines adjustment PS1-0,1=L PS1-2,2-0,1=Hi-z
IC10-DATA,CLK=Hi-z
39 P-MUTE O Power IC mute control
H:mute off L:mute on
Power off after that 15 second H
40 SVR O Power IC servo control
H:When momentary power down detected
L:Nomal
41 P-STBY O Power IC standby control H:Power IC ON L:Power IC OFF 42 SW5V O
SW 5V control H:SW5V OFF L:SW5V ON
Power off after that 10 second H
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
MICROCOMPUTER'S TERMINAL DESCRIPTION
5
Pin No. Name I/O Description Processing Operation
43 B.U-DET I Back up detection terminal H:power down L:B.U. on 44 ACC-DET I ACC detection terminal H:ACC OFF L:ACC ON
45 PS1-0 O
Power supply IC SW1 control 0 Audio 8V,P-CON
46 PS1-1 O
Power supply IC SW1 control 1 Audio 8V,P-CON
47 PS1-2 O Power supply IC SW1 control 2 P-ANT
Power supply IC SW2 control 0
48 PS2-0 O
ILL,FM,AM
Power supply IC SW2 control 1
49 PS2-1 O
ILL,FM,AM
50 BEEP BEEP
H:Light on L:Light off
51 DSI O DSI control
When panel attached,output L When panel detached,flashing at the panel (H/L)
FIX model is output L 52 NC O Not used (out put L) 53 NC O Not used (out put L) 54 LOE/LIM SW I CD mechanism down&limit detection H:Chucking detection L:Normal 55 MO SW O CD mechanism loading motor control output H:Loading,Eject,Break L:Play 56 LO/EJ I/O
CD mechanism loading/Eject switching terminal
H:Eject L:Loading 57 M-STOP O Stop output to the CD mechanism H:Play L:Stop 58 M-RST O Reset output to the CD mechanism H:Normal L:CD mechanism reset 59 M-MUTE I Mute input from the CD mechanism H:mute off L:mute on 60 RESET Reset input from the System microcomputer 61 REMO I Remote control input 62 R-CLK I RDS clock input Except RDS model : output L
H:Changer detection 63 CH-REQC I Request input from the changer (new 5L) L:Request
Except Changer model : output L 64 LOS SW I CD mechanism loading's switch detected
H:No disc
L:DISK IN(Loading Start) 65 KEY-REQ I
Key input detected H:Key no input
(11pin L connected to the DATA L) L:Key input (edge key data reading start) 66 12EJE SW I 12cm disc detected L:12cm disc 67 Vss0 68 VDD1 69 X2 3 MAIN X'tal oscillating circuit 3 4.19MHz X'tal connection 70 X1 3 MAIN X'tal oscillating circuit 3 4.19MHz X'tal connection 71 IC TEST 72 XT2 Not used OPEN 73 XT1 74 VDD0 VDD Connected to VDD
75 AVREF0
A/D converter reference voltage control output,
connection to the 80pin AVCONT 76 S-METER I S-meter input 77 NOISE I FM noise detection input ∆3
2.5V or greater:NAVI MUTE
78 PHONE I 2way mute 1.0V or less:TEL MUTE
Except phone mute model : output L
79 NC O Not used (out put L) 80 AVCONT O A/D converter standard voltage control output
H:During A/D converter active same timing with PON
BA4911 SW1 Power supply IC output
PS1-2 PS1-1 PS1-0 A8V P-CON P-ANT
L L L STANBY LL(H)H(L)ON OFF OFF L H H ON ON OFF H H H ONONON
BA4911 SW2 Power supply IC output
PS2-1 PS2-0
ILLUMI
FM AM
L L STANBY
L(H)H(L)ON ON OFF
H H ON OFF ON
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
MICROCOMPUTER'S TERMINAL DESCRIPTION
6
MECHANISM MICROCOMPUTER MN6627771KP (X32 : IC2)
Pin No. Name I/O Description Processing Operation
1 TVD O Traverse driver output (PWM output) 2 SPL O Spindle motor drive output (PWM output) 3 PC O Spindle motor ON output L:ON H:OFF (default ) 4 PWM O multi-purpose PWM output It's possible to setup the TOSF2 5 TBAL O Tracking balance adjust output (PWM output) 6 FBAL O Focus balance adjust output (PWM output) 7 NRFDET I RF detection signal input L:detected 8 OFT I Off-track signal input H:detected
9 BDO I Drop out signal input H:detected 10 LDON O Laser on signal output H:ON When command FO on,LDON is H 11 DSLB O DSL balance output 12 DVDD1 - Power supply for digital circuit 13 DVSS1 - Ground lines for digital circuit 14 AVSS2 - Ground lines for analog circuit For DSL,PLL and AD 15 DSLF I/O Loop filter terminal for DSL The bias of ARF output terminal in one 16 ARF I RF signal input 17 RFSW I When DSL circuit,constant switch terminal 18 PLLF I/O Loop filter terminal for PLL 19 PLLF2 I/O
Loop filter characteristic switching terminal for PLL 20 IREF I Standard voltage input terminal 21 RFENV I RF envelope signal input Analog input 22 TRCRS I Track cross signal input Analog input 23 TE I Tracking error signal input Analog input 24 FE I Focusing error signal input Analog input 25 AVDD2 - Power supply for analog circuit For DSL,PLL and AD 26 AVSS1 - Ground lines for analog circuit For audio output (Lch and Rch in one) 27 OUTR O Rch audio output 28 AVDD1 - Power supply for analog circuit For audio output (Lch and Rch in one) 29 OUTL O Lch audio output 30 DVSS3 - Ground lines for digital circuit 31 CSEL I Oscillation frequency specification terminal H:33.8488MHz L:16.9344MHz 32 NC O Not used 33 ASEL I Audio output polarity switching terminal L:Reverse H:Non reverse 34 MSEL0 I Destination type selection port (set 2bit) Order "MSEL 0" and "MSEL 1" Set up 35 MSEL1 I Destination type selection port (set 2bit) Order "MSEL 0" and "MSEL 1" Set up 36 ICRST O Reset control terminal for external DAC 37 BCLK O Bit clock output for serial data 38 LRCK O L/R identification signal output 39 SRDATA O Sirial data output 40 VREFP I A/D converter standard power supply input 41 HOT I
Temperature protection detection terminal (AD input)
Over C5(h):on 42 8EJE_SW I 8cm disc eject stop detection terminal H:Stop 43
12EJE/SDET_SW
I Judge the 8cm or 12cm disc 12cm disc stop detection terminal 44 LOE/LIM_SW I Pick-up inside detected Loading end detection terminal 45 PCK O PLL extracted clock output,etc 46 EFM O EFM signal output,etc 47 SENSE O Optics servo status signal output,etc 48 CLVS O
Spindle servo phase synchronous signal output,etc
L:Normal operation H:Luff servo 49 DEMPH O Dephase detection signal output,etc H:on 50 DVDD2 - Power supply for digital circuit 51 X1 I Main clock input terminal
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
MICROCOMPUTER'S TERMINAL DESCRIPTION
7
Pin No. Name I/O Description Processing Operation
52 X2 O Main clock output terminal 53 DVSS2 - Ground lines for digital circuit 54 XSUB1 I
When external DAC,external clock input terminal 55 XSUB2 O 56 TEST1 I Test port 1 Normal operation is H fixed 57 TEST2 I Test port 2 Normal operation is H fixed 58 NC O Not used 59 VER/HOR O Put length or breadth switching motor terminal H:Put length L:Put breadth 60 DRV_MUTE O Driver mute control terminal L:MUTE ON H:MUTE OFF 61 /MUTE_L O Audio Lch MUTE output L:MUTE 62 /MUTE_R O Audio Rch MUTE output L:MUTE 63 /RST I LSI reset input terminal H:Normal L:Reset 64 OCD_CLK I When OCD connected, clock input 65 /MSTOP I Standby detection terminal H:Normal L:Mecha stop 66 DATA I/O
I2C bus data line (communication line with system computer)
At that time serial writer connected
67 SBIO I
When connected to serial writer,data input terminal 68 /CLK I/O
I2C bus clock line (communication line with system computer)
At that time serial writer connected 69 TX O Digital audio interface signal output 70 EQCNT O RF EQ switching terminal L:x2 times H:x1 times 71 XSEL I During the external DAC connection MCLK external input (H:input) 72 MCNT I CD mecha Loading/Eject control ON/OFF L:OFF (HOST control) H:mechanism control 73 P-ON O Audio and servo origin power control terminal L:power on H:power off 74 MOTOR O Loading/Eject control switching terminal At that time LO/EJ is "H" 75 LO/EJ O Loading/Eject control terminal or output L When 72pin (P82) is "L",output "L" 76 CD-RW O CD-RW control terminal H:CD-RW L:normal 77 LDCNT O LD control terminal Operation is same LDON as timing 78 DVDD3 - Power supply for digital circuit 79 FOD O Focus driver output (PWM output) 80 TRD O Tracking driver output (PWM output)
TYPE2 TYPE1 TYPE0 MODEL NAME
L L L KDC-2024SA/SYA, 2024SG/SYG
uPD780058GC499
L L H KDC-2022, 2022V,202MR L H L RY-391CD, RX-491CD L H H KDC-4023, 2023, 3023 L L H KDC-122, 122S
uPD780058GC501 L H H KDC-1023, 1023S
H L H KDC-222, 222S
L L L KDC-3024G/YG, 307G/YG
uPD780058GC502
L H H KDC-3023R H L L KDC-3024A/YA, 307A/YA H L H KDC-4024/Y/V/YV
uPD780058GC503 L L L KDC-2094YA/YG
H: R135 R137 R139 L: R136 R138 R140

System mi-com Destination type list

KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
8

ADJUSTMENT

1.

IC10 (TDA7513) -The Tuner adjustment method

• When IC10 and its circumference are fixed, according to the following order, it readjusts if needed.
• The adjustment item changes with parts to exchange. Please refer to "Parts vs Adjustment item table".
1-1. VCO Coil Adjustment -- Adjustment of Tunning Voltage
Voltage Check Point : Vt-Check Land
(PWB Side_B, around D506) Adjustment Coil : L507 (VCO Coil) The adjustment method : VCO coil is turned and adjusted
according to the following tables.
M : AM Adjustment For Your Information : The frequency of SET is only set up by
Pre-Set-Key in case this adjustment
The appearance and the coil with which S-METER DC voltage
serves as the maximum are turned and adjusted
in the above-mentioned SG input.
By the above-mentioned adjustment method, same adjustment
is performed to both sides (1st&2nd MIX Coil).
TYPE Mode freq. Voltage Fig
E/M AM 1611kHz 5.5 ± 0.1(V) (C)
K AM 1700kHz 5.8 ± 0.1(V) (C)
J FM 90.0MHz 5.6 ± 0.1(V) (C)
W
(Wide Band)
FM 108.0MHz 7.2 ± 0.1(V) (C)
1-2. Adjustment of 1st & 2nd-MIX Coil
Voltage Check Point : S_METER-Check Land
(PWB Side_B, around W572) Adjustment Coil : 1stIFT = L508 / 2ndIFT = L509 Setting of Signal Generator : Refer to the following tables
TYPE MODE freq. Mod. ANT Input Fig
K AM 1000kHz OFF 35dBuEMF (B),(C)
E,M,J,W AM 999kHz OFF 35dBuEMF (B),(C)
The appearance and the coil with which S-METER DC voltage
serves as the maximum are turned and adjusted in the above-mentioned SG input.
By the above-mentioned adjustment method, same adjustment
is performed to both sides (ANT&RF Coil).
1-3. Adjustment of FM_ANT&RF Coil
Voltage Check Point : S_METER-Check Land (PWB
Side_B, around W572)
Adjustment Coil : ANT_Coil = L505
RF_Coil = L506
Setting of Signal Generator
: Refer to the following tables.
TYPE MODE freq. Mod. ANT Input Fig
E/M FM 87.5MHz OFF 5 or 11dBuEMF (A),(C)
K FM 87.9MHz OFF 5 or 11dBuEMF (A),(C) J FM 76.0MHz OFF 5 or 11dBuEMF (A),(C)
W
(Wide Band)
FM 65.0MHz OFF 5 or 11dBuEMF (A),(C)
1-4. Adjustment of STEREO (adjustment of 456k-VCO)
Adjust in TEST_MODE
• How to enter the test mode While pressing on [ FM ] and [ PRESET 6 ] keys, reset the unit.
• Adjustment method Complete on condition that show "ALL OFF" when pressing on [ PRESET 1 ] and [ PRESET 6 ] keys. (Writing adjustment valve to the EEPROM.) Effect of adjustment is in cofirmation of adjustment status at [ PRESET 4 ] key.
• Display of [ PRESET 4 ]
Adjustment "OK" : 14seg model "E2P OK" 7seg model "EPO" Adjustment "NG" : 14seg model "E2P ERR" 7seg model "EPE"
• Releasing the test mode Reset mode only. ACC off, Power off, Power down and Remove the panel mode is not releasing.
[Fig.3]
(
UNDER VIEW
)
[Fig.2]
[Fig.1]
(
OVER VIEW
)
(
REAR VIEW
)
(
TUNER ANT
)
(A)
(B)
S-METER Check Land
IC10
Vt Check Land
FM-SG
AM-SG
L509
L508
L507
L506
L505
(C)
DC Voltmeter
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023
9
ADJUSTMENT
2.IC10 (TDA7513) Replacement-Parts vs Adjustment Item Table
• When the parts in the following tables are exchanged, please readjust according to a table.
• When other parts are exchanged, please perform only a check of operation. There is no necessity for readjustment.
Replacement parts Adjustment Item
Ref ANT
Parts Name Number TYPE Parts Number VCOVt 1st MIX 2nd MIX Coil RF Coil Stereo
IC10 ALL TDA7513 ™™™™™™
EEP-ROM M24C01-WMN6T
IC12 ALL BR24C01AF-W ™™™™™™
S-24CS02AFJ-TB
Antenna Coil J L31-0966-05
L505 E,K,M L31-0967-05
W
(Wide Band)
L31-0968-05
RF Coil J L31-0969-05
L506 E,K,M L31-0970-05
W
(Wide Band)
L31-0971-05
VCO Coil J L32-0932-05
L507 E,K,M L32-0933-05 ™™™™™
W
(Wide Band)
L32-0934-05 1st MIX Coil L508 ALL L30-0770-05 2nd MIX Coil L509 ALL L30-0771-05 Variable Capacitance Diodes
D504
J,E,K,M KV1720S
™™™™™
W
(Wide Band)
KV1735S Variable Capacitance Diodes
D505
J,E,K,M KV1720S
™™™™™
W
(Wide Band)
KV1735S Variable Capacitance Diodes
D506
J,E,K,M KV1720S
™™™™™
W
(Wide Band)
KV1735S X'tal X501 ALL L77-2077-05
The "™" mark shows that the adjustment is need.
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