Kenwood KDC-9026R, KDC-PSW9527, KDC-W9027 Service Manual
CD RECEIVER
KDC-9026R
KDC-PSW9527
KDC-W9027
KDC-X979
SERVICE MANUAL
© 2004-02 PRINTED IN JAPAN
B53-0132-00 (N) 2704
Panel assy
KDC-9026R (A64-3236-11)
KDC-9026R
Panel assy
KDC-W9027 (A64-3238-01)
Panel assy
KDC-PSW9527 (A64-3237-11)
KDC-PSW9527
Panel assy
KDC-X979 (A64-3235-11)
KDC-W9027
* DC cord
(E30-6294-05)
*Remote controller assy
(A70-2026-05) : RC-420
Lever
(D10-4674-04) x 2
* Depends on model. Refer to the parts list.
* DC cord
(E30-4942-05)
*Remote controller assy
(A70-2040-05) : RC-505
* Escutcheon
(B07-3078-01)
(B07-3079-01)
*Size AA Battery
(Not Supplied)
Mounting hardware assy
(J21-9823-03)
* Antenna adaptor
(T90-0552-05)
Plastic cabinet assy
(A02-2731-13)
*Screw set
(N99-1723-05)
TDF PANEL INFORMATION
MODEL PARTS NO. PANEL NAME
KDC-9026R
KDC-PSW9527 Y33-1790-60 TDF-M9000
KDC-X979
KDC-W9027 Y33-1790-61 TDF-M7000
Screw
(N99-1734-05)
KDC-X979
KDC-9026R/PSW9527
KDC-W9027/X979
● ELECTRIC UNIT
(X34- )
TUNER
AUDIO OUT
Q303,304
S-METER
CD
CH
SW5V
IC1
E2PROM
TDF UNIT
(X16-208)
DISPLAY
UNIT
(X16-253)
SWITCH UNIT
(X16-256)
AM+B
BU5V
8V
CD5V
BACK UP
REMO
8V
IC7
LEVEL
SHIFT
IC11
IC9
ROT ARY
ENCODER
IC14
u-COM
SW5V
RDS
DECODER
E2PROM
SW5V
LEVEL
SHIFT
BPF
BU5V
IC8
PANEL5V
FL
KEY
KEY MATRIX
8V
AGC
IC2
IC4
IC10
SW5V
BUFFER
IC1
2.5V
MASK
ROM
FLASH
ROM
BPF
BLOCK DIAGRAM
8V
IC2
FM
AM
CD
CH
E-VOL
&
MPX
QUAL
LEDLED
ILL+
AGC
RESET SW
LEVEL
SHIFT
SYSTEM
MICROPROCESSOR
BU5V
Q6,10
PANEL
SW5V
IC6
3.3V
Q5
SW3.3V
Q4
FL3.3V
Q2,3
FL+B
KEY ILL
BAS S
L.P.F
L.P.F L.P.F L.P.F
IC10
DSP3.3V
8V 8V
x2
DSP
IC15
MOTOR
FL+B
FAC
8V
1/2VCC
IC8
SERVO
PANEL
MECHA
SW5V
SERVO
DC/DC
ILL+
RESET
BU5V
IC16
MOTOR
DRDR
IC9
3.3V
SRAM
MUTE
DRIVER
Q207,208
PRE MUTE
Q203,204
PRE MUTE
Q205,206
PRE MUTE
IC4
POWER
IC
BU5V
IC18
Q23,24
ANT-CON ANT CON
Q25
EXT AMP
Q26
TEL MUTE
Q29
ACC DET
Q27
BU5V
SW5V
SW14V
DC/DC A8V
9V
CD5V
AUX IN
IC13
OP AMP
IC12
OP AMP
IC11
OP AMP
P-CON P CON
DIMMER DIMMER
B.U DET
Q1,2
BU5V
Q3,601
SW 5V
Q4,5
SW 14V
Q6-8
A8V
Q9,602
SERVO
Q11-14
FL+B
IC19
SW REG
9V
9V
9V
PRE OUT
(SUB WOOFER)
(CENTER)
PRE OUT
(REAR)
PRE OUT
(FRONT)
SP OUT (FL)
SP OUT (FR)
SP OUT (RL)
SP OUT (RR)
WIRED REMO/
OPEL DISP I/F
EXT.AMP.CON
TEL MUTE
ACC
BACK UP
2
● CD PLAYER UNIT
KDC-9026R/PSW9527
KDC-W9027/X979
BLOCK DIAGRAM
(X32-5520-00)
DPU1 :
OPTICAL PICKUP
ACB
EF
FO COIL
TR COIL
DM2
SLED
MOTOR
DM1
SPINDLE MOTOR
ASSY
SPINDLE
MOTOR
LIM SW
D.GND
DM3
LOADING
MOTOR
Q8
APC
IC6
4CH
PWM
DRIVER
IC1
MOTOR
DRIVER
S.GND
S.GND
TR
IC7
RF AMP/
SERVO
PROCESSOR/
MP3 DECODER/
WMA DECODER/
1Mbit SRAM
VREF
CLOCK
16.898MHz
IC8
DRAM
16Mbit
1.6V REG.
D.GND
D.GND
IC9
A3.3V
REG
IC5
MICROPROCESSOR
(CD MECHANISM
CONTROL)
CLOCK
4.00MHz
IC10
PON
LPF
D.GND
Q7
IC4
D3.3V
REG
SW
IC2
D3.3V
REG
D.GND
D.GND
D.GND
S.GND
S2
S4
S1
S5
S3
MAIN
BOARD
A+8V
L-ch
R-ch
A.GND
MRST
MSTOP
CLK
DATA
MUTE L
MUTE R
BU.+5.0V
D.GND
S.+5.0V
S.GND
8EJE/LOS
SW
LOE SW
12EJE SW
LOS SWD.GND
LOAD
EJECT
COMPONENTS DESCRIPTION
● SUB CIRCUIT UNIT (X16-2080-10)
Ref No. Application / Functions Operation / Condition / Compatibility
IC1 E2PROM E2PROM for security
● DISPLAY UNIT (X16-2530-10/11)
Ref No. Application / Functions Operation / Condition / Compatibility
IC1 Panel microprocessor Panel control microprocessor
IC2 ROM IC Graphic ROM
IC3 Flash ROM IC For Display customize memory IC
IC4 AVR For 3.3V power supply
IC5 AVR For 2.5V power supply
IC6 Buffer IC Level shift buffer IC (5V→3.3V)
IC7 Buffer IC Level shift buffer IC (3.3V→5V)
IC8 Remote control IC For Remote control sensor
IC9 Logic IC Control for FL contrast
IC10 Analog IC Spectrum analyzer IC
Q1 3.3V Regulator While PAN5V is applied when 3.3V regulator output is +3.3V
Q2 2.5V Regulator While PAN5V is applied when 2.5V regulator output is +2.5V
Q3,4 FL +B SW FL +B (VDD1) is turned on when Q3 base level goes H
3
KDC-9026R/PSW9527
KDC-W9027/X979
COMPONENTS DESCRIPTION
Ref No. Application / Functions Operation / Condition / Compatibility
Q5 3.3V SW SW3.3V is turned on when Q5 base level goes L
Q6,200 FL 3.3V SW FL +3.3V (VDD1) is turned on when Q200 base level goes H
Q7,8 Remote control ON SW The power supply of IC8, 10 is turned on when Q10 base level goes H
Q9 FL BLK SW VFD is turned on when Q9 base level goes H
Q10 Display blackout LED SW Green LED is turned on when Q10 base level goes H
Q11 Red LED SW Red LED is turned on when Q11 base level goes H
● SWITCH UNIT (X16-2560-10)
Ref No. Application / Functions Operation / Condition / Compatibility
Q1 DSI LED SW DSI LED blinks when Q1 base level goes H/L
Q2 KEY Illumination SW (Green) KEY Illumination SW “ON” when the Q2 base level goes H
Q3 KEY Illumination SW (Red) KEY Illumination SW “ON” when the Q3 base level goes H
Q4 KEY Illumination SW (Blue) KEY Illumination SW “ON” when the Q4 base level goes H
● CD PLAYER UNIT (X32-5520-00)
Ref No. Application / Functions Operation / Condition / Compatibility
IC1 Motor driver Loading & Eject motor driver
IC2 AVR BU3.3V AVR
IC4 AVR SW3.3V AVR (When CNTL is goes H, IC3 is actives)
IC5 Mechanism control micro processor IC6 PWM driver Focus, Tracking coil, Feed and Spindle motor driver IC
IC7 DSP CD signal processor, RF amp, Servo control, MP3 & WMA decoder
IC8 EDO DRAM Date buffer (16MB)
IC9 AVR Audio 3.3V AVR (When P-ON level goes H, Q12, 13 are turned ON)
IC10 LPF Audio LPF
Q1 Switching TR When MRST goes L, Q1 is turned ON
Q2 Switching TR When Q1 goes ON, Q2 is turned ON
Q6 Switching TR When Q7 goes ON, Q6 is turned ON
Q7 Switching TR When P-On goes H, Q7 is turned ON
Q8 APC Auto power control & A 5V constant current circuit
Q9 Driver 1.6V AVR driver
Q10 Switching TR Loading & Eject motor drive voltage selector
Q11 Switching TR Guarantee of proper operation for between IC’s Low level voltage
Q12 Switching TR When Q13 base level goes H, Q12 is turned ON
Q13 Switching TR When P-On goes H, Q13 is turned ON
● ELECTRIC UNIT (X34-3050-11/21, X34-3052-71/72)
Ref No. Application / Functions Operation / Condition / Compatibility
IC1 System control IC System control microprocessor
IC2 E-VOL & tuner IC E-VOL. FM/AM tuner & stereo decoder
IC3 Power supply IC For A8V AVR
IC4 Audio power IC Audio power amplifier
IC7 Power supply IC -9V AVR (For 4.5V Pre-out)
IC8 Reset IC When BU5V line voltage is less than 3.5V, this IC output line is “L”
IC9 Muting logic IC Control for MUTE, P-ANT & RESET muting
IC10 Buffer IC For spectrum analyzer
IC11~13 OP AMP For 4.5V Pre-out
IC14 RDS decoder Decode for RDS signal
4
KDC-9026R/PSW9527
KDC-W9027/X979
COMPONENTS DESCRIPTION
Ref No. Application / Functions Operation / Condition / Compatibility
IC15,16 Motor driver Control for Panel mechanism motor
IC18 P-CON IC Power control IC
IC19 Power supply IC Switching regulator IC for CD4.7V
IC20 Analog SW Logic IC for muting control
Q1,2 BU 5V AVR While BU is applied when BU5V regulator output is +5V
Q3,601 SW5V AVR When Q601base level goes H, SW5V regulator output is +5V
Q4,5 SW14V AVR When Q5 base level goes H, SW14V regulator output is +14V
Q6~8 Audio 8V AVR When Q6 base level goes H, A8V regulator output is +8.3V
Q9,602 Servo +B AVR When Q602 base level goes H, S+B regulator output is +7.5V
Q11~14 Illumination & DC/DC +B AVR When Q11 base level goes H, AVR output is +9.2V
Q15,16 Audio 10.5V AVR When Q16 base level goes H, AVR output is +10.5V
Q17~19 Pre Amp & -9V AVR
Q20~22 Pre Amp & +9V AVR
Q23,24 P-ANT SW When Q23 base level goes H, P-ANT SW output is +14V
Q25 Buffer EX amp control buffer
Q26 Small lamp det. SW When Q26 base level goes H, Q26 turned ON
Q27 BU detector When Q27 base level goes H, Q27 turned ON
Q29 ACC detector When Q29 base level goes H, Q29 turned ON
Q30,31 Muting driver When base level goes L, muting driver is turned ON
Q32,33 Surge DET. When Q32 base level goes H, Q32, 33 are turned ON
Q34 Muting driver When Q34 base level goes L, muting driver is turned ON
Q201 Buffer Noise detect buffer amp
Q202 E-VOL muting SW When Q202 base level goes H, muting SW is turned ON
Q203~208 Pre-out muting SW When base level goes H, Pre-output is muted
Q210 AGC For AGC for spectrum analyzer
Q303,304 AM +B SW When Q303 base level goes H, AM +B is out to tuner unit
Q18, 19 work as differential amplifier, Q17 wark as driver and -9.1V is supplied to OP
AMP for Pre-out
Q20, 22 work as differential amplifier, Q21 wark as driver and +9.4V is supplied to OP
AMP for Pre-out
● ELECTRIC UNIT (X34-3060-10, X34-3062-71)
Ref No. Application / Functions Operation / Condition / Compatibility
IC1 OP AMP Buffer amp for ADC input (DSP Lch)
IC2 OP AMP Buffer amp for ADC input (DSP Rch)
IC3 OP AMP LPF for DAC output (DSP Front)
IC4 OP AMP LPF for DAC output (DSP Rear)
IC5 OP AMP LPF for DAC output (DSP Sub & Center)
IC6 OP AMP Sub output amp
IC7 Analog SW Bus management SW (Dolby prologic II)
IC8 OP AMP Bus management accumulator (Dolby prologic II)
IC9 OP AMP Reference AVR
IC10 DSP Audio DSP (24bit 2ch ADC & 6ch DAC)
IC11 SRAM For DSP
IC12 Buffer IC Level shift buffer IC(5V→3.3V)
IC13 AVR D 3.3V AVR (For DSP)
IC14 AVR A 3.3V AVR (For DSP)
Q1 AVR 3.3V regulator
Q2 AVR 3.3V regulator
5
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