Kenwood KDC-5090B, KDC-5090BY Schematic

CD RECEIVER
KDC-5090B/BY
SERVICE MANUAL
© 2001-11 PRINTED IN JAPAN B51-7870-00 (N) 1940
Escutcheon assy (B07-3007-03)
KDC-5090B
Plastic cabinet assy (A02-1497-13)
Front glass (B10-4236-11)
PTY
X
TI VOL ADJ
Lever (D10-4562-04)x2 (D10-4621-04)x2 : KDC-5090B
Panel assy (A64-2683-12)
DAB
Screw set (N99-1704-05)
Mounting hardware assy (J21-9641-13)
The MECHANISM OPERATION DESCRIPTION is the same as model KDC-S3007 and KDC-5050RG. Please refer to the service manual for model KDC-S3007(B51-7029-00) or KDC-5050RG(B51-7099-00).
DC cord (E30-4944-05): KDC-5090BY (E30-4958-05): KDC-5090B
Antenna adaptor (T90-0523/0534-05)
KDC-5090B/BY
BLOCK DIAGRAM ................................................................... 3
COMPONENT DESCRIPTION ................................................ 4
MICROCOMPUTER’S TERMINAL DESCRIPTION................. 6
TEST MODE ............................................................................ 8
ATTENTION ........................................................................... 10
PC BOARD ............................................................................. 11
CD PLAYER UNIT (X32-5010-00)....................................... 11
ELECTRIC UNIT (X25-87X2-7X) ....................................... 13
SWITCH UNIT (X13-99XX-X4)........................................... 14
SCHEMATIC DIAGRAM......................................................... 17
ELECTRIC UNIT (X25-87X2-7X) ....................................... 17
SWITCH UNIT (X13-99XX-X4)........................................... 21

CONTENTS

CD PLAYER UNIT (X32-5010-00)...................................... 23
EXPLODED VIEW ................................................................. 25
PARTS LIST........................................................................... 27
SPECIFICATIONS............................................... BACK COVER
2
PLL+B
FM+B
Q45,47 Q46,48
AM+B
DIMMER
MUTE
2WAY
DET.
ACC
BU DET.
A8V
A8V
Q14,15
Q16,17
Q19-22
SERVO AVR
Q18
SERVO+B
SW5V
Q13
Q55,56
Q33
Q11,12
SW5V
BU5V
BU5V
P CON
Q27,29
Q30,32
MUTE
IC3 Q7
DRIVER
MUTE
Q1,2,5,6
POWER IC
IC4
u-COM
CD
CH
F/E
A1
E-VOL
IC2
PRE OUT
SP-OUT
DIMMER
TEL-MUTE
ACC
ANT-CONT
P-CONT
DECODER
RDS
IC1
IC7
Q51
ILLUM
+B
BUFFER
NOISE
Q43
PRE OUT OUTPUT VOLTAGE
Q26
Q34
NAVI-MUTE
PANEL 5V
PANEL 5V
SW14V
PANEL POSITION DET.
CH
QUAL
SERVO+B
MUTE R
STOP
SW2
LO/EJ
MUTE L
RST
SW3
SW1
SDA
SCL
A8V BU5V
SW5V
RST
REQ C
CLK
CH-CON
DATA H
REQ H
CD
AM
FM
P MUTE
MUTE
SW5V
PANEL5V
ILL+B
SRT-SW1
SRT-SW2
RDCK
RDDA
QUAL
SDA
SCL
AFS
AFS
A8V
PLL DATA
PLL CLK
IFC OUT
S-METER
SW5V
DATA C
BACK UP
BU5V
CHANGER
AM
FM
230mV
1200mV
1200mV
251mV
AUDIO OUT
FM+B
NOISE
CD
MODEL
3600mV
3600mV
855mV
1372mV
LEVEL
MO SW
BACK UP
BU5V
RESET IC
IC8
MATRIX
KEY
L DATAL
L CE L CLK/PANEL
DIMMER
REMO
PAN5V
RESET
DRIVER
MUTE
LCD DRIVER
IC1
IC2
Q5
Q55,56
Q3,4
ED1
SW
RESET
LCD
(BACK LIGHT WLED)
DIMMER PWM CONTROL
REMO
G/R SW
LCD AVR
PANEL 5V
(X13- )
,42
PAN 5V SW

BLOCK DIAGRAM

KDC-5090B/BY
3
KDC-5090B/BY

COMPONENT DESCRIPTION

SWITCH UNIT (X13-99XX-X4)
Ref. No.
IC1 LC75808W LCD driver with the key matrix IC2 RS-171 Remote sensor IC Q1 DTA114EUA or KRA302 Key-permission SW For the key scanning start Q3 2SD2114K Red LED SW When a base goes Hi, RED LEDs are turned on. Q4 2SD2114K Green LED SW When a base goes Hi, GREEN LEDs are turned on. Q5 2SC2412K or 2SD601A VLCD AVR
Q6 DTA114EUA or KRA302 REMO SW
Q7 DTC143ZK Dimmer SW
ELECTRIC UNIT (X25-87X2-7X)
Ref. No.
IC1 UPD703033GC117
IC2 TDA7407D E.VOL & N.C.MPX IC
IC3
IC4 TA8263BH Power AMP. IC IC7 TDA7479D RDS decoder IC8 S-80837ANNP Reset IC When BU 5V voltage is less than 3.7V, IC outputs Lo. Q1 DTC143TUA or KRC410 Pre mute (Front L) When Q1s base goes Hi, Pre-output is muted. Q2 DTC143TUA or KRC410 Pre mute (Front R) When Q2s base goes Hi, Pre-output is muted. Q5 DTC143TUA or KRC410 Pre mute (Rear L) When Q5s base goes Hi, Pre-output is muted. Q6 DTC143TUA or KRC410 Pre mute (Rear R) When Q6s base goes Hi, Pre-output is muted.
Q7 DTA124EUA or KRA303 Mute driver
Q11 2SC4081 or 2SD1819A Q12 2SB1548(P) Q11 and Q12 are inverted Darlington connection.
Q13 2SA1576A or 2SB1218A SW 5V
Q14 2SC4081 or 2SD1819A Q15 2SB1548(P)
Q16 DTC124EUA or UN5212
Q17 DTA124EUA or KRA303 Q18 2SD2375 SERVO +B AVR When Q18’s base goes Hi, SERVO +B AVR outputs 8V. Q19 DTC124EUA or UN5212
Q20 DTA124EUA or KRA303
Component Name Application / Function Operation / Condition / Compatibility
While a base goes Lo, PAN 5V is supplied to the Remote sensor IC. Usually Q7s base goes Hi. When DIMMER mode is selected, pulse wave shape is applied to Q7s base.
Component Name Application / Function Operation / Condition / Compatibility
or UPD703033GC145
HD74HC02FP or TC74HC02AF
System MI-COM.
Mute logic 2-input NOR x 4
When BU detection SW or System RESET or MI-COM.’s Pre-mute is working, a base goes Lo, and Q7 is turned on.
BU 5V AVR
A8V AVR When Q14s base goes Hi, A8V AVR outputs 8V.
SW14V SW While Q16s base goes Hi, Q17 is turned on, A8V AVR and
ILL +B SW While Q19s base goes Hi, Q20 is turned on, and ILL +B
While BACKUP is applied, AVR outputs +5V.
While a base goes Lo, SW 5V is supplied to the microprocessor peripheral circuits.
A8V AVR and SERVO +B AVR ON/OFF control
SERVO +B AVR are working.
ILL +B AVR ON/OFF control
AVR is working.
4
KDC-5090B/BY
COMPONENT DESCRIPTION
Ref. No.
Q21 2SB1184 Q22 2SC4081 or 2SD1819A Q26 DTC144EUA or UN5213 Small lamp detection SW When vehicle small lamps turn on, Q26 is turned on . Q27 DTC114YUA or UN5214 Q32 2SB1277(Q,R) Works during POWER ON mode. Q29 DTA124EUA or KRA303 P-CON. protection inhibit SW Prevents Q30 tuning ON during start-up after power ON. Q30 2SA1576A or 2SB1218A P-CON. protection SW Protect Q32 by turning ON when P-CON output is grounded.
Q33 2SC4081 or 2SD1819A BU detection SW turned on. When momentary power down has detected,
Q34 2SC4081 or 2SD1819A ACC detection SW While ACC is applied, a base goes Hi, and Q34 is turned on.
Q42 DTC124EUA or UN5212 E. VOL mute SW
Q43 2SC4081 or 2SD1819A Noise buffer Q45 DTC124EUA or UN5212 Q47 2SB1277(Q,R) Works during FM reception mode. Q46 DTC124EUA or UN5212 Q48 2SB1277(Q,R) Works during AM reception mode. Q51 DTC144EUA or UN5213 IFC buffer Waveform shaping Q52 2SC4081 or 2SD1819A Composite signal output buffer Q55 2SA1576A or 2SB1218A Q56 DTC124EUA or UN5212 and Q55 is turned on.
Component Name Application / Function Operation / Condition / Compatibility
ILL +B AVR
P-CON SW
FM +B SW
AM +B SW
PAN 5V SW
While Q22s base goes Hi, AVR outputs +10.5V. Works during POWER ON mode with a panel attached to the set.
When Q27s base goes Hi, Q32 is turned on .
While BACKUP is applied, a base goes Hi, and Q33 is
a base goes Lo, and Q33 is turned off.
When BU detection SW or MI-COM.s mute is working, a base goes Hi, and Q42 is turned on.
When Q45s base goes Hi, Q47 is turned on.
When Q46s base goes Hi, Q48 is turned on.
While a panel is attached to the set, Q56s base goes Hi,
CD PLAYER UNIT (X32-5010-00)
Ref. No.
IC1 AN22000AA RF amplifier error and tracking error) signals.
IC2 MN662774KG1 CD signal processor bult-in MI-COM. IC4 BA5917AFP 4CH BTL driver IC6 NJM4565MD OP Amp. Low pass filter Q1 MCH6101 APC LD power control
Q2 DTC124EUA P ON SW
Q3 DTA143XUA A.8V SW Q4 2SA1362 (Y) D.5V SW
Q5 DTC124EUA MOTOR SW
Component Name Application / Function Operation / Condition / Compatibility
Generation of RF signal based on the signals from the APC circuit and pickup, and generation of servo error (focusing
Detection of dropout, anti-shock, track crossing and off-track conditions, Gain control function building in.
Focusing coil, tracking coil, spindle motor and sled motor driver
When CD source is selected, Q2s base goes Hi, Q3 and Q4 are turned on. A8V ON/OFF control. When a base goes Lo, Q3 is turnde on. D5V ON/OFF control. When a base goes Lo, Q4 is turnde on. When CD loading or eject operation is activating, Q5s base goes Hi, Q4 is turned on.
5
KDC-5090B/BY
MICROCOMPUTER’S TERMINAL DESCRIPTION
IC1 (ELECTRIC UNIT : X25-87X2-7X)
Pin No. Pin Name I/O Description Processing Operation
1 AM+B O AM+B control Hi : During AM reception 2 FM+B O FM+B control 3 AFS O 4 PLL-DATA I/O Data input/output with F/E 5 PLL-CLK I/O Clock input/output with F/E 6 EVDD - Positive power supply connection terminal Connected to BU 5V lines. 7 EVSS - Ground connection terminal Connected to GND lines. 8 NC O Not used (N.C.) 9 BEEP O BEEP sound output 10 REMO I 11 CH-REQH O Request output to changers Lo : Request 12 CH-RST O Reset output to changers : Reset 13 IC2-SDA I/O 14 IC2-CLK I/O 15 CH-MUTE I Mute request from changers Hi : Mute request 16 CH-CON O Changer control Hi : Operation mode, Lo : Standby mode 17 18 TEST - Test terminal Not used (Connected to GND lines) 19 P-MUTE O Power IC mute control output Lo : Mute (POWER OFF, TEL MUTE) 20 P-STBY O Power IC standby control output 21 MUTE O IC2 mute control output Hi : Mute on 22 NC O Not used (N.C.) 23 PRE-MUTE O Pre-outputs mute control output Lo : Mute 24 ACC-DET I ACC detection input Hi : ACC OFF, Lo : ACC ON 25 DIMMER I Small lights detection input Lo : During vehicle small lamps turn on. 26 SW5V O SW 5V control output
27
28 P-CON O Power control output Hi : POWER ON mode except ALL OFF mode. 29 ANT-CON O Antenna control output Hi : During FM/AM reception or TI reception. 30 P-ON O SW 14V control output 31 RESET I Reset input terminal Lo : System reset 32 XT1 I Sub clock resonator connection terminal Clock count during POWER OFF mode 33 XT2 - Sub clock resonator connection terminal 34 REGC - C terminal
35 X2 - Main clock resonator connection terminal
36 X1 I Main clock resonator connection terminal 37 VSS - Ground connection terminal Connected to GND lines. 38 VDD - Positive power supply connection terminal Connected to BU 5V lines. 39 CLKOUT O Internal system clock output Not used (N.C.) 40,41 NC O Not used (N.C.) 42~45 46 IC2TYPE0 I IC2 setting terminal Lo : Initial value 47 IC2TYPE1 I IC2 setting terminal Lo : Initial value
6
DIMMER-CON
EXT-AMP-CON
TYPE0~TYPE3
Noise detection time constant switching terminal
Data input from the remote control light sensor
Data line with IC2, IC5 and CD MECHA. MI-COM. Clock line with IC2, IC5 and CD MECHA. MI-COM.
O Dimmer control output Pulse wave shape : DIMMER mode, Hi : POWER ON
O External amp. control output Bass boost LOW__Hi : 130msec, Lo : 70msec
I Destination type input terminal 0~3
Hi : During FM reception, Hi : Last FM mode (only RDS model) Hi : During FM reception, Lo : During FM seek or AF search
Hi : POWER ON mode except panel detached or panel mask position
Lo : POWER ON mode or during CD loading/eject action. Bass boost OFF__Hi : 160msec, Lo : 40msec
Bass boost HI__ Hi : 100msec, Lo : 100msec
Hi : POWER ON mode or during CD loading/eject action
Oscillation stop : POWER OFF mode or momentary power down detected
KDC-5090B/BY
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No. Pin Name I/O Description Processing Operation
48~51 NC O Not used (N.C.) 52 ILL-ON O Illumination AVR on/off control output 53 M-MUTE L I 54 M-MUTE R I 55 BVDD - Positive power supply connection terminal Connected to BU 5V lines. 56 BVSS - Ground connection terminal Connected to GND lines. 57 M-RST O Reset output to CD MECHA. MI-COM. Lo : Reset 58 M-STOP O Stop request to CD MECHA. MI-COM. Lo: Stop mode, Hi : Operation mode 59 NC O Not used (N.C.) 60 LO/EJ I/O CD MECHA. loading/Eject switching output Lo : Loading, Hi : Eject, Hi-Z : Stop or Break 61 MOSW O CD mechanism loading motor control output Hi : CD loading/eject action or Break, Lo : other 62 NC O Not used (N.C.) 63 CD-SW3 I Down & limit switch detection input Hi : Chucking, Lo : Pickup most inner position 64 NC O Not used (N.C.) 65 L-CE I/O CE output to LCD driver 66~69 NC O Not used (N.C.) 70 AVCONT O 71 AVDD ­72 AVSS ­73 AVREF I 74 PHONE I PHONE detection input 75,76 NC (GND) I Not used (pull down to GND lines) 77 SRT-SW2 I SRT position detection input 78 SRT-SW1 I SRT position detection input Mask : (SW1, SW2) = (Lo, Lo) 79 NOISE I FM noise detection input 80 S-METER I S-meter input from F/E 81 R-DATA I Data input from the RDS decoder IC Except RDS model : Not used (pull down to GND lines) 82 R-QUAL I Quality input from the RDS decoder IC Except RDS model : Not used (pull down to GND lines) 83 IFC-OUT I F/E IFC OUT input terminal Hi : Station detected, Lo : Not detected 84,85 NC (GND) I Not used (pull down to GND lines) 86 NC O Not used (N.C.) 87 R-CLK I Clock input from the RDS decoder IC Except RDS model : Not used (pull down to GND lines) 88 CH-REQC I Request input from changers Lo : Request 89 KEY-REQ I 90 CD-SW1 I Loading detection Lo : CD chucking. 91 CD-SW2 I 12cm disc detection terminal 92 NC O Not used (N.C.) 93 BU-DET I Momentary power down detection input 94 CH-DATAC I Data input from changers 95 CH-DATAH O Data output to changers 96 CH-CLK I/O Clock input/output with changers 97 L-DATAL I Data input from the LCD driver IC 98 L-DATAS I/O Data output to the LCD driver IC
99 L-CLK I/O
100 PAN5V O Panel 5V control Hi : Panel attached, Lo : Panel detached
Mute request (Lch) from CD MECHA. MI-COM. Mute request (Rch) from CD MECHA. MI-COM.
A/D converter reference voltage control output A/D converter positive power supply connection terminal A/D, D/A converter ground connection terminal A/D converter reference voltage input terminal
Communication request input form LCD driver IC
Clock output to the LCD driver IC /Panel detaching detection input (LCD Driver)
Hi : POWER ON mode except panel detached or panel mask position Lo : Mute request Lo : Mute request
Hi : Active, Connected to AVREF terminal. Connected to BU 5V lines. Connected to GND lines.
1V or less : TEL MUTE, 2.5V or greater : NAVI MUTE
Panel : (SW1, SW2) = (Hi, Hi) , Slide : (SW1, SW2) = (Hi, Lo)
When 12cm disc was detected, the input becomes Lo temporarily.
Hi : When momentary power down detected or BU OFF, Lo : BU ON
Lo : Panel attached
7
KDC-5090B/BY

TEST MODE

1. How to enter the test mode
While holding the FM and Preset 6 keys, reset the unit.
2. How to exit from the test mode
While holding the Preset 6 key, reset the unit. (Note) The test mode cannot be terminated by ACC OFF,
power OFF or momentary power down.
3. Initial status in the test mode
Sources : ALL OFF
Display : All segments are lit.
Volume : 10dB (displayed as 30”)
Loudness : OFF
CRSC : OFF regardless of the presence of switch-
ing function.
SYSTEM Q : Flat
4. Special display in Tuner mode
When any of the following messages is displayed in Tuner mode, the F/E may be abnormal.
TNE2P NG : The EEPROM is set to the default (un­stable values) because the F/E was shipped without pass­ing through the adjustment process, etc.
TNCON NG : Communication with the F/E is not pos­sible.
5. Forced switching of K3I
Each press of the Preset 6 key in Tuner mode should switch K3I from AUTO Forced Wide Forced Middle Forced Narrow AUTO. The initial status is AUTO and the display shows these modes as follows.
AUTO : FMA
Forced Wide : FMW
Forced Middle : FMM
Forced Narrow : FMN
6. Test mode specifications of the CD receiver
Forced ejection is inhibited in the reset start operation. When the unit is reset while a CD is loaded in it, the CD is not recognized by resetting.
Each press of the Track Up key jumps to the following track numbers: No. 9 No. 15 No. 10 No. 11 No. 12 No. 13 No. 14 No. 9 (The cycle restarts from here.)
Each press of the Track Down key jumps to the previous track number to the track being played.
7. Audio-related specifications
A short press of the Q key initiates the audio adjustment mode.
Pressing the ✽ key on the remote initiates the audio ad- justment mode.
Continuous holding of a remote control key is inhibited.
Bass, Middle and Treble are adjusted in 3 steps of Min /
Center / Max with the Track Up/Down keys.
Balance is adjusted in 3 steps of Left Max / Center / Right Max with the Track Up/Down keys.
Fader is adjusted in 3 steps of Rear Max / Center / Front Max with the Track Up/Down keys.
HPF is adjusted in 2 steps of Through/220Hz with the Track Up/Down keys.
LPF is adjusted in 2 steps of Through/120Hz with the Track Up/Down keys.
Bass f, Bass Q, Bass EXT, Middle f, Middle Q and Treble f are not dealt with by the audio adjustment.
8. Menu-related specifications
A short press of the CLK key initiates the Menu mode.
Pressing the DNPP/SBF key on the remote initiates the
Menu mode.
Continuous holding of a remote control key is inhibited.
Contrast is adjusted in 3 steps of 0/5/10 and the default is
5.
9. Backup current measurement
When the unit is reset while ACC is OFF (i.e. by turning Backup ON), the MUTE terminal goes OFF in 2 seconds in place of 15 second. (The panel and CD mechanism are not activated at this time.)
8
TEST MODE
KDC-5090B/BY
10. Special display when the display is all on
Pressing the Preset keys while the power is ALL OFF dis­plays the following information.
[PRESET 1] Version display (8 digits, Month/Day/Hour/Minute)
(Display) SYS xxxxxxxx System microcomputer [PRESET 3] Short press : View power ON time. (The All OFF period is not counted.)
Long press/hold : Clear power ON time.
(Display) PonTim xxxxx Max. 65535 (hours) [PRESET 4] Short press : Display CD operation time.
Long press/hold : Clear CD operation time
(Display) CDTime xxxxx (CD/R) Max. 65535 (hours) [PRESET 5] Short press : Display CD ejection count.
Long press/hold : Clear CD ejection count.
(Display) EjeTim xxxxx Max. 65535 (times) [PRESET 6] Short press : Display Panel open/close count.
Long press/hold : Clear Panel open/close count.
(Display) PnCnt xxxxx Max. 655350 (times)
11. Other specifications
• Messages such as “CODE OFF” are not displayed when power is turned ON.
• Pressing the TI (AUTO) key during changer operation turns 2zone ON. 2zone can be turned OFF by pressing the TI (AUTO) key again. The P/S dot lights while 2zone is ON.
• Pressing and holding the CLK key for a second in the ALL OFF status the Mask Key (security) write mode.
• Security-related information
1. Forced Power ON mode (All models)
Even when the security (Mask key) is approved, resetting the unit while holding the ATT and Preset 4 keys makes it possible to turn the power ON for 30 minutes. After 30 minutes have elapsed, it is not possible to return to the previous condition unless the unit is reset again.
2. Method of registration of the security code after EEPROM (Tuner Unit Ass’y) replacement (Code security model)
1) Enter the test mode. (See 1. How to enter the test mode)
2) Press the CLK key to enter the security registration mode.
3) Enter the code using the Preset 1/2/3/4 keys. Example : To enter “3510”
• Press the Preset 1 key 4 times.
• Press the Preset 2 key 6 times.
• Press the Preset 3 key twice.
• Press the Preset 4 key once.
4) Hold down the DISP key for at least 3 seconds and the message, “RE-ENTER” appears, so once again enter the code according to Step 3) above.
5) Press and hold the DISP key for 3 seconds until “AP­PROVED” is displayed.
6) Exit from the test mode. (See 2. How to exit from the test mode)
(Note) All Clear is not applicable to the security code of
this model.
3. Method of writing the Mask key while the EEPROM is in the initial status
1) Enter the test mode. (See 1. How to enter the test mode)
2) Press the CLK key to enter the Mask key registration mode. “TRANSMIT1” should be displayed now. The dis­play at this time should show “< >” in place of “ [ ] ”.
3) Point the Mask key remote toward the light sensor, and press and hold its key for more than 0.5 second.
4) When “TRANSMIT2” is displayed, press and hold the key on the Mask key remote for more than 0.5 second again. The first and second counter codes are not com­pared at this time.
5) When “APPROVED” is displayed, the write operation is complete. Now the demonstration mode is initiated and the test mode is terminated.
(Note) In the same way as previous models, if 30 minutes
have elapsed with no code written, an error occurs and the power is turned OFF.
9
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