Kenwood KDC-232MR User manual

© 2005-11 PRINTED IN JAPAN
B53-0344-00 (N)600
CD RECEIVER
KDC-232MR
SERVICE MANUAL
Panel assy
(A64-3804-02)
SPARE TDF PANEL
MAIN UNIT NAME TDF PARTS No. TDF NAME
KDC-232MR Y33-2410-62 TDF-62DMR
Mounting hardware assy
(J21-9716-03)
Lever
(D10-4589-04) x2
DC cord
(E30-6415-15) Screw set
(N99-1757-05)
Escutcheon
(B07-3123-01)
VOL
AUD
FF
SET UP
SCAN RDM REP
KDC-232MR
AUTO
FM
AM
Q AME MENU
M.RDM
SCRL
/ C.S.
Carrying case
(W01-1661-05)
Screw (4x16)
(N84-4016-48)
This product uses Lead Free solder.

KDC-232MR
2
BLOCK DIAGRAM
CD
CHANGER
J2
TUNER,MPX
IC10
&
AM AGC
Q501
FM AGC
L506
J4
E-VOL.
IC11
E2PROM
SYSTEM u-COM
IC1
IC7
RDS
DECODER
RST IC
IC8
PRE OUT MUTE
Q351,352
IC4
POWER IC
MUTE LOGIC
IC6
J1
PAN5V
Q151
Q72
SERVO
VFD REG
IC15
POWER SUPPLY IC
IC3
ED1
VFD
with
VFD DRIVER
IC1 REMOTE IC3
VOL
S11 KEY MATRIX
DSIQ155
ACC DET
BU DET
Q53
Q52
Q51
SURGE DET
P-CON
TEL MUTE
BACK-UP
SP OUT
P-ANT
ACC
PRE OUT
TEL MUTE
C81,D81,Q82
DME1
SERVO
A8V
BU5V
AUDIO OUT
AM+B
ANT
MPX OUT
MPX IN
800mV
1200mV
AUDIO OUT
BU5V
A8V
BACK
PAN5
SERVO P-ANT
SW5V
AM+B
A8V
BU5V
P-CON
SW5V
AM+B
AUDIO+B
VCC
ILLUMI
BU5V
ILLUMI
PAN5V BU5V
KEY
:CHANGER
CD
FM (E Type)
FM (J/K Type)
AM (J/K Type)
AM (E Type) : :
:
:
: 1800mV
1372mV
600mV
855mV
3600mV
3600mV
ELECTRIC UNIT (X34-)
SWITCH UNIT (X16-)
7
VREF
L-ch
R-ch
A. GND
A8V
D. GND
BU5V
LOE/LIM SW
12EJE SW
LOS SW
S7.5V
LO/EJ
MOTOR
S. GND
VREF
VREF
2
2
4
DRV MUTEMUTE
DOUT
DATA
4
2
CLK
MSTOP
MRST
MUTE L
MUTE R
2
2H
L
12
5
2
4
3
20
21
13
15
1
14
9
7
6
8
18
12
11
10
22
19
EF
AC
B
TR COIL
FO COIL
APC SERVO
u-COM
IC2
Q1
16.934MHz
CLOCK
X1
DRIVER
MOTOR
IC3
PROCESSOR
LPF
IC4
8V SW
Q4
Q3SW
S3
S1
S2
D. GND
RF AMP
IC1
REF
5V REG
D2
S. GND
A. GND
D. GND
SLED
LOADING
5V SW
Q2
D. GND
D. GND
LOADING & SLED
MOTOR
SPINDLE MOTOR
AMP
Q5,6,D3
CURR.
DM1
DM2
SW +5V
A+5V
PICK-UP (DPU1)
CD PLAYER UNIT (X32-5750-00)
BOARD (X34-)
MOTHER
MECHA ASSY (X92-)

KDC-232MR
3
●ELECTRIC UNIT (X34-4160-12)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 System µ-COM System controller.
IC3 Power Supply IC DC5Vx2, 7.9Vx1, 8.1Vx1, 10.2Vx1, P-CON, P-ANT output.
IC4 Power IC Signal amplifier.
IC6 Mute logic IC Controls for mute action.
IC8 Reset IC “L” :detection voltage below 3.6V.
IC10 E-VOL & Tuner E-VOL, Tuner, Stereo decoder.
IC11 E2PROM Saves & Loads for tuner adjustment data.
IC15 Regulator IC Outputs 11.3V for LED andVFD.
Q51 Serge Det. ON when the base goes “Hi”.
Q52 B.U. Det. ON when the base goes “Hi” during BU applied.
Q53 ACC Det. ON when the base goes “Hi” during ACC applied.
Q71 Control SW for SERVO+B ON when the base goes “Hi”.
Q72 SERVO+B AVR Outputs voltage 7.5V.
Q151 Panel 5V SW ON when the base goes “Lo”.
Q155 DSI ILLUMI SW ON when the base goes “Lo”.
Q252 STANDBY SW for IC4 ON when the base goes “Lo”.
Q330 Mute driver for Q351, Q352 ON when the base goes “Lo”.
Q351 Mute SW for Lch PRE OUT Audio pre-output is muted when the base goes “Hi”.
Q352 Mute SW for Rch PRE OUT Audio pre-output is muted when the base goes “Hi”.
Q501 AM RF Amplifier Adjusts for Gain.
●SWITCH UNIT (X16-3500-11)
Ref. No. Application / Function Operation / Condition
IC1 VFD DRIVER
Q21 PAN SW5V “ON” when the base goes “H”.
●CD PLAYER UNIT (X32-5750-00)
Ref. No. Application / Function Operation / Condition
Generation of RF signal based on the signals from the APC circuit and pickup, and
IC1 RF AMPLIFIER responding generation of servo error (focusing error and tracking error) signals.
to CD-RW Detection of dropout, anti-shock, track crossing and off-tracking conditions, included
gain control function during CD-RW.
Focusing, tracking, sled and spindle servo processing.
IC2 CD SIGNAL PROCESSOR Automatic adjustment (focusing, tracking, gain, offset and balance) operations.
built-in µ-COM Digital signal processing (DSP, PLL, sub-codes, CIRC error correction, audio data
interpolation processing) operations, and microcomputer function.
IC3 4ch BTL DRIVER Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and
eject operation.
IC4 L.P.F. (LOW PASS FILTER) 2nd low pass filter for audio signals.
Q1 APC (AUTOMATIC POWER CONTROL) LD power control.
Q2 DIGITAL +5V SW “ON”When P. ON signal goes “L”.
COMPONENTS DESCRIPTION

KDC-232MR
4
Ref. No. Application / Function Operation / Condition
Q3 Q4 SW “ON”When P. ON signal goes “L” (SW+5V is ON).
Q4 ANALOG +8V SW “ON”When P. ON signal goes “L” (Q3 is ON).
Q5, 6 CURRENT AMP Current driver.
COMPONENTS DESCRIPTION
MICROCOMPUTER’STERMINAL DESCRIPTION
●SYSTEM µ-COM : IC1 on X34- (ELECTRIC UNIT)
Pin No. Pin Name I/O Application
Truth Value
Processing/Operation/Description
Table
1DCERR I DC offset error detection input
2LINE MUTE I Phone detection TEL mute:1V or lower
NAVI mute: 2.5V or higher
3ROTARY CW I Rotary encoder input
4AVSS -
5TUNER TYPE1 I E-VOL setting switching qRefer to the truth value table
6TUNER TYPE2 I E-VOL setting switching qRefer to the truth value table
7AVREF1 -
8VFD DATAF I Data input from VFD driver
9 VFD DATAS O Data output to VFD driver
10 VFD CLK O CLK output toVFD driver
11 VFD RST O Reset output toVFD driver L: Display off, key reset, panel detached
H: Display on, key scan
12 VFD CE O CE output toVFD driver
13 ROTARY CCW I Rotary encoder input
14 TDF DET I Panel detection H: Panel detached, L: Panel attached
15 PWIC BEEP O Beep output
16 LX DATA S I Data from slave unit
17 LX DATA M O Data to slave unit
18 LX CLK I/O LX-BUS clock
19 RDS AFSL O Tuner RDS mute output wRefer to the truth value table
ADJ=H
20 TUNER ADJ I For IC10 adjustment PS1-1, 2=L PS1-3=Hi-Z, PS2-1, 2=Hi-Z
Tuner data, CLK=Hi-Z
21 TUNER SD I Tuner search stop input H: Station found, L: Station not found

KDC-232MR
5
Pin No. Pin Name I/O Application
Truth Value
Processing/Operation/Description
Table
22 LX RST O Forced reset to slave unit H: Reset, L: Normal
23 LX CON O Start-up request to slave unit H: Slave unit ON, L: Slave unit OFF
24 LX REQ M O Communication request to the slave unit
25 AUD SDA I/O E-VOL and tuner I2C data input/output
26 AUD SCL I/O E-VOL and tuner I2C CLK output
27 PWIC STBY O Power IC STBY output H: Power IC ON, L: Power IC OFF
28 VOL MUTE O E-VOL mute output L: Mute OFF, Hi-Z: ON
29 PWIC MUTE O Power IC mute output L: Power OFF, STANDBY, or TEL mute.
30 TUNER FANC OUT O Tuner block (in µ-com) check L: E2P OK, H: NG
31 RESET2 O Mute for reset Output L
32 RDS DATA I RDS decoder data input
33 VSS1 -
34 RDS QUAL I RDS decoder QUAL input
35 ACC DET I ACC detection L: ACC ON, H: ACC OFF
36 BU DET I Momentary power down detection L: BU found,
H: BU not found (momentary power down)
37 PON I/O SW5V/SW14V control L: ON, Hi-Z: OFF
38 PS2-2 O Power Supply control output 2-2 eRefer to the truth value table
39 PS2-1 O Power Supply control output 2-1 eRefer to the truth value table
40 PS1-1 O Power Supply control output 1-1 eRefer to the truth value table
41 PS1-2 O Power Supply control output 1-2 eRefer to the truth value table
42 PS1-3 O Power Supply control output 1-3 eRefer to the truth value table
43 NC -
44 PON CD I/O Power supply control for MP3 L: ON, Hi-Z: OFF
45 CD MUTE I CD mute request L: Mute request
46 CD MSTOP O CD mechanism µ-com stop H: Mechanism µ-com in operation,
L: Mechanism µ-com stopped
47 CD LOE LIM SW I CD detection (chucking SW) H: Loading completed, L: Disc not found
48 CD LOEJ I/O CD motor control rRefer to the truth value table
49 CD MOTOR O CD motor control rRefer to the truth value table
50 NC -
51 CD MRST O CD mechanism µ-com reset H: Normal, L: Reset
52 CD SCL I/O CD mechanism I2C clock output
53 CD DISC12 SW I 12cm disc detection
54 CD LOS SW I CD loading detection
55 CD SDA I/O CD mechanism I2C clock input/output
56 OEM DISP CE I/O External display CE External display
57 OEM DISP CLK I/O External display CLK External display
58 OEM DISP DATA I/O External display DATA External display
59 DSI O DSI control
H: DSI ON, L: DSI OFF
TDF DET=blink when H
60 RESET -
61 NC -
62 PON FL O VFD power supply ON H: ON, L: OFF
L:WhenTDF DET is H, H:WhenTDF DET is L
MICROCOMPUTER’STERMINAL DESCRIPTION

KDC-232MR
6
Pin No. Pin Name I/O Application
Truth Value
Processing/Operation/Description
Table
63 KEY REQ I Communication request from VFD driver L: Key input
64 RDS CLK I RDS decoder CLK input
65 REMO I Remote control input
66 LX REQ S I Communication request from slave unit
67 VSS0 -
68 VDD1 -
69,70 X2,X1 -
71 TEST -
72,73 XT2,XT1 -
74 VDD0 -
75 AVDD -
76~78 TYPE 3~1 I Destination switching tRefer to the truth value table
79 RDS NOISE I Tuner Quality (Noise) input
80 TUNER SMETER I Tuner S meter input
MICROCOMPUTER’STERMINAL DESCRIPTION
TRUTHVALUETABLE
tDESTINATION
TYPE 3 TYPE 2 TYPE 1 DESTI MODEL
(pin 76) (pin 77) (pin 78) NATION
000K
KDC-232MR/MP2032/
MP232
001EKDC-W4534/Y
010M
KDC-MP4033/MP4033S/
MP4533
011--
100--
101--
110--
111--
r CD MECHA CONTROL OPERATION
CD LOEJ CD MOTOR CD MECHA OPERATION
LH Load
HH Eject
Hi-Z L Stop
Hi-Z H Brake
w RDS AFSL (AF search)
Normal condition communication (IC10 side : High)
High (Quality time constant long / Stereo Decoder PLL : Not
hold)
Low AF search (IC10 side : Middle)
(Quality time constant short / Stereo Decoder PLL : Hold)
e POWER SUPPLY IC (IC3) CONTROL
SEL1 (Pin No. 11)
PS1-2 PS1-3 PS2-1 ILLUMI P-CON P-ANT
LLLOFF OFF OFF
LLHONOFF OFF
HLHONONOFF
HHHONONON
SEL2 (Pin No. 12)
PS1-1 PS2-2 AUDIO SW5 AM
LLOFF OFF OFF
HLONON OFF
HHONON ON
qTUNERTYPE
Model TYPE 1 TYPE 2
KENWOOD brand model (initial value) L L
OEM model (with CRSC changed) L H
KENWOOD brand model (with CRSC changed) H L
KENWOOD brand model (to support test-driving in EU) HH

KDC-232MR
7
MICROCOMPUTER’STERMINAL DESCRIPTION
●CD MECHANISM µ-COM : IC2 on X32- (CD PLAYER UNIT)
Pin No. Pin Name I/O Application Processing Operation
1TVD O Traverse drive output (PWM output).
2SPL O Spindle motor drive output (PWM output).
3NC-No connection.
4PWM O Multipurpose PWM output.
5TBAL O Tracking balance adjustment output (PWM output).
6FBAL O Focusing balance adjustment output (PWM output).
7NRFDET I RF detection signal input. L : Detection
8OFT I Off-tracking signal input. H : Detection
9BDO I Drop-out signal input. H : Detection
10 LDON O Laser-on signal output. H : Focus ON
11 DSLB O DSL balance output.
12 DVDD1 - Power supply for digital circuit.
13 DVSS1 - GND for digital circuit.
14 AVSS2 - GND for analog circuit. For DSL, PLL and A/D converter
15 DSLF I/O Loup filter for DSL and bias output for ARF.
16 ARF I RF signal input.
17 RFSW I DSL circuit time constant switch.
18 PLLF I/O Loup filter for PLL.
19 PLLF2 I/O Loup filter character switch for PLL.
20 IREF I Reference current input.
21 RFENV I RF envelope signal input.
22 TRCRS I Tracking cross signal input.
23 TE I Tracking error signal input.
24 FE I Focusing error signal input.
25 AVDD2 - Power supply for analog circuit. For DSL, PLL and A/D converter
26 AVSS1 - GND for analog circuit. For Lch/Rch audio output
27 OUTR O Rch audio output.
28 AVDD1 - Power supply for analog circuit. For Lch/Rch audio output
29 OUTL O Lch audio output.
30 DVSS3 - GND for digital circuit.
31 CSEL -
32 NC - No connection.
33 ASEL -
34 MSEL0 -
35 MSEL1 -
36~39 NC - No connection.
40 VREFP - Reference power supply input for A/D converter.
41 HOT -
42 8EJE SW -

KDC-232MR
8
MICROCOMPUTER’STERMINAL DESCRIPTION
Pin No. Pin Name I/O Application Processing Operation
43 12EJE/SDET SW -
44 LOE/LIM SW I Loading-end detection / H : Loading-end detection
Pick-up inner circumference detection. L : Pick-up inner circumference detection
45~49 NC - No connection.
50 DVDD2 - Power supply for digital circuit.
51 X1 I Main clock input.
52 X2 O Main clock output.
53 DVSS2 - GND for digital circuit.
54 XSUB1 -
55 NC - No connection.
56 TEST1 - Test terminal. Normal condition :“H” fixed
57 TEST2 - Test terminal. Normal condition :“H” fixed
58,59 NC - No connection.
60 DRV MUTE O Driver mute control. L : Mute ON, H : Mute OFF
61 MUTE L O Audio Lch mute output.
62 MUTE R O Audio Rch mute output.
63 RST I LSI reset input.
64 OCD CLK -
65 MSTOP I Standby detection.
66 DATA I/O I2C bus data line (Communication line to system µ-com). During serial writer is connected.
67 SBIO I Data input. During serial writer is connected.
68 CLK I/O I2C bus clock line (Communication line to system µ-com). During serial writer is connected.
69 TX O Digital audio interface signal output.
70 NC - No connection.
71 XSEL -
72 MCNT I Loading control / Eject control. L : OFF (Host control), H : Mecha µ-com control
73 P. ON O Audio & Servo power supply control. L : Power supply ON.H : Power supply OFF
74,75 NC - No connection.
76 CD-RW O CD-RW control. H : CD-RW, L :Normal disc
77 NC - No connection.
78 DVDD3 - Power supply for digital circuit.
79 FOD O Focusing drive output (PWM output).
80 TRD O Tracking drive output (PWM output).

KDC-232MR
9
●How to enter the test mode
Press and hold the [1] and [3] keys and reset.
(While “– – – –” is being displayed, power can be ON for 30
minutes.)
●How to clear the test mode
Reset. (Not cancelled by Power OFF or ACC OFF.)
●Test mode default condition
•Source is STANDBY.
•Display lights are all turned on.
•The volume is at -10dB (The display is 30).
•LOUD is OFF.
•CRSC is off regardless of the availability of switching func-
tion.
•SYSTEM Q is NATURAL (=FLAT).
•BEEP always functions when the key is pressed while in
sources other than STANBY.
●Specification of test mode for tuner
K3I forced switching
•[6] key inTUNER mode switches AUTO →forced narrow →
forced middle →forced wide.
•When K3I AUTO, if PTY dot is off, filter value read from
FAST4 is displayed. If force-set, PTY dot is lit and the set-
ting value is displayed. (“Forced/AUTO” is determined by
the PTY dot being on or off.)
Wide : “FMW 98.1”
Middle : “FMM 98.1”
Narrow : “FMN 98.1”
●CD receiver test mode specification
• Display mode default setting shall be P-TIME.
•Forced ejection is prohibited while reset-starting. Note that
CD is not to be recognized by reset while it is inserted.
•Jumps to the next tracks by pressing the [ ] key.
No.9 →No.15 →No.10 →No.11 →No.12 →No.13 →
No.22 →No.14 →No.9 (Recursive)
Note that when playing a MP3 / WMA / AAC disc with 8
files or less, the disc is played from the 1st track in the
regular order.
•Pressing the [ ] key goes back by 1 track from the track
being played.
•When CD is the source, press the [1] key to jump to No.28.
•When CD is the source, press the [2] key to jump to No.14.
•When CD is the source, press the [6] key to jump to No.15.
At this time, the volume value is set to 25.
●AUDIO adjust mode
•Press the [AUD] key and enter the audio adjustment mode.
•Press the remote control [∗] key and [AUD] key to go into
the audio adjustment mode.
•Both AUDIO FUNCTION MODE and SETUP MODE ad-
justment items are included.
•By pressing [AUD] and [FM] keys, switch the item to be ad-
justed in the following order. (Only in forward rotation)
The default item shall be Fader, and then the item is for-
warded in the following order: Balance →Bass Level →
Middle Level →Treble Level.
•Continuous forwarding by remote control is prohibited.
•Fader is adjusted by the VOL knob and [ ] / [ ] keys in
3 steps: R15 ↔0 ↔F15. (Default value: 0)
•Balance is adjusted by theVOL knob and [ ] / [ ] keys
in 3 steps: L15 ↔0 ↔R15. (Default value: 0)
•Bass/Middle/Treble are adjusted by theVOL knob and [ ]
/ [ ] keys in 3 steps: -8 ↔0 ↔+8. (Default value: 0)
•Volume Offset is adjusted by the VOL knob and [ ] / [ ]
keys in 2 steps: -8 ↔0. (Default value: 0)
•Loudness ON/OFF is adjusted by theVOL knob and [ ] /
[ ] keys in 2 steps:OFF ↔ON. (Default value: OFF)
●MENU
• Press [Q] key to enter the MENU.
•Press the remote control [DNPP/SBF] key to enter the
MENU.
•Continuous forwarding by remote control is prohibited.
●Backup current measurement
If reset while in Acc OFF (Back Up ON) condition, MUTE ter-
minal goes off 2 seconds later, rather than 15 seconds.
(During this time, the CD mechanism does not function.)
●Fluorescent indicator tube (ED1) short-checking
•When the source is STANDBY, press [ATT] key to switch
the process in the following order.
1. All lights off.
2. Every 125m sec, light the odd and even number of the
grid with the largest numbers.
3. Light only odd number terminals.
4. Light only even number terminals.
5. All lights on.
∗After the step 5 above, the process goes back to the
step 1 and then repeats the steps.
TEST MODE

KDC-232MR
10
●OEM display communication
OEM display communication line while in test mode outputs
the following.
(Communication line output condition is switched every 500m
sec.)
●Initializing AUDIO-related setting value
Press the [ ] key in the STANDBY source and reset the AU-
DIO setting value to the test mode default value.
●Other
•When Power ON, do not display “CODE_OFF” and
“CODE_ON”.
•When the source is STANDBY, press [AUTO] key to switch
key illumination GREEN/RED.
(in the model with ILLUMI switching function)
•When started in Test Mode, duration of prohibiting LINE
MUTE shall be changed from 10 seconds to 1 second.
•While in Test Mode, serial number is not written with a se-
rial-number-writing jig.
•When in Test Mode, when DC offset error detection is run,
the detection information is not written into the E2PROM.
•DEMO mode shall not be operated while inTest Mode, CD
Mechanism Error Log Data Clearing Mode, or DC Offset
Error Detection Data Clearing Mode.
●Special displays while all lights are on
When all indicators are on with STANDBY source, if the fol-
lowing keys are pressed, the following messages are displayed.
[1] key Version is displayed (forwarding)
(Display)TYPE: x___ → 070710: 10 → All indicators are on.
(“x” is displayed in hexadecimals.) Date (xxxx) Time (xx: xx)
∗TYPE indicates µ-com destination, and shows real-time
condition of the destination terminal
[2] key Serial No.is displayed (8 digits)
(Display)x x x x x x x x
[3] key Key pressed: Power ON time is displayed.
While Power ON time is displayed, press and hold for 2
seconds or longer to clear the Power ON time.
(Display)PON_0H x x (00~50 is displayed for “xx”.)
x x x x x (00001-10922 is displayed for “xxxxxx”.)
MAX 10922 (hours)
[4] key Key pressed: CD operation time is displayed.
While CD operation time is displayed, press and hold for 2
seconds or longer to clear the CD operation time.
(Display)CDT_0H x x (00~50 is displayed for “xx”.)
x x x x x (00001-10922 is displayed for “xxxxxx”.)
MAX 10922 (hours)
[5] key Key pressed: Number of CD EJECT times is displayed.
While the CD EJECT times is displayed, press and hold for 2
seconds or longer to clear the CD EJECT time.
(Display)EJC x x x x x MAX 65535 (times)
[6] key Key pressed:Number of times panel is opened/closed is
displayed.
While the number of times panel is opened/closed is displayed,
press and hold for 2 seconds or longer to clear the value.
(Display)PC_ x x x x x MAX 65535 (times)
[FM] ROM correction version is displayed.
key When not written in: ROM_R – – –
(Display)ROM_R123 When data not matching ROM_R ∗ ∗ ∗
[AM] FAST4 adjustment status
key•“E2P_OK” :Adjustment completed
• “E2P_ER”: E2PROM values are still default (not determined).
• “I2C_ER”: Cannot communicate with FAST4/EEPROM.
∗If “E2P_OK”, Pin30 (TUN FANC OUT) should be output as “H”.
[]Audio data initialization (Display) AUD_INIT
key
[]Key pressed:Forced Power OFF data displayed.
keyWhile the forced power OFF data is displayed, press and hold
for 2 seconds or longer to clear the data.
(Display)POFF_ – – – (No Forced Power OFF)
SEC (Forced Power OFF because of missing
Security Code)
PNL (Forced Power OFF because of system µ-com
panel communication error)
[]Key pressed: CD information display mode ON/OFF
key While in CD information display mode, press and hold for 2
seconds or longer to clear all CD information
∗Please refer to the following “CD infor mation display mode”.
TEST MODE
CE
DATA
CLK
500msec 500msec 500msec

KDC-232MR
11
CD information display mode
[AM] I2C communication condition display (Display) I2C_OK__
key NG
CD mechanism error log display[switched by [ ] / [ ] keys]
↑(Display)MCERR1: x x ↔MCERR2: x x ↔MCERR3: x x
↔MCERR1: x x ↔
(For “xx”, “–” or the error code is displayed.)
CD loading error log display [switched by [ ] / [ ] keys]
(Display)LDERR1: x x ↔LDERR2: x x ↔LDERR1: x x ↔
(number of times is displayed for “xx”) MAX 99 (times)
↓CD ejection error log display [switched by [ ] / [ ] keys]
[FM] (Display)EJERR1: x x ↔EJERR2: x x ↔EJERR3: x x
key ↔EJERR4: x x ↔EJERR1: x x ↔
(number of times is displayed for “xx”) MAX 99 (times)
CD time code error count data display (missing counts)
[switched by [ ] / [ ] keys]
(Display)CNT_LOSE ↔CDDA__: x x ↔CDROM_: x x
↔CNT_LOSE ↔
(number of times is displayed for “xx”) MAX 99 (times)
CD time code error count data display (count not updated)
[switched by [ ] / [ ] keys]
(Display)CNT_STAY ↔CDDA__: x x ↔CDROM_: x x
↔CNT_STAY ↔
(number of times is displayed for “xx”) MAX 99 (times)
Security
•How to enter the forced POWER ON mode
While “– – – –” is being displayed, while simultaneously
pressing [Q] key and [4] key, press [RESET] button, With
this, it is possible to turn the power on for 30 minutes only.
•How to clear the programmable security code
∗Operation 1
1. While “– – – –” is being displayed, press [ ] key for 3
seconds or longer while pressing the [AUTO] key. This
makes the “– – – –” display disappear.
2. Input “KCAR”, using the remote controller.
Press [5] key of the remote controller twice (Input for “K”)
and press [ ] key.
Press [2] key of the remote controller 3 times (Input for
“C”) and press [ ] key.
Press [2] key of the remote controller once (Input for “A”)
and press [ ] key.
Press [7] key of the remote controller twice (Input for “R”)
and press [ ] key.
3. The security is cleared and the unit enters STANDBY
source.
4. If wrong codes are input,“– – – –” will be displayed again.
∗Operation 2
1. After code has been registered, in STANDBY source,
press and hold the [Q] key for 1 second or longer to go
into the MENU.While “CODE_CLR” is displayed, press
the [ ] keys for 1 second or longer to cancel the secu-
rity code.
2. Input pre-registered code, using [FM] / [AM] / [ ] / [ ]
keys.
[FM] key: numbers go up / [AM] key: numbers go down
[] key: cursor moved to the right / [ ] key: cursor
moved to the left
3. Press the [ ] key for 3 seconds or longer and “CLEAR”
is displayed.
4. When the input code is not registered, “ERROR” is dis-
played. Go back to the step 2 and input the code again.
●Clearing CD mechanism information and service
information (Clearing E2PROM data)
1. While pressing the [Q] key and [ATT] key, reset-start to start
CD mechanism and service information initialization.
(While “– – – –”is being displayed, power can be ON for 30
minutes.)
[CD mechanism information]
•Displays I2C communication condition
•Displays CD mechanism error log
•Displays CD loading error data.
•Displays CD ejection error data.
•Displays CD time code error count data (missing count).
•Displays CD time code error count data (count not up-
dated).
[Service Information]
•Displays power ON time is displayed.
•Displays CD operation time.
•Displays number of CD EJECT times.
•Displays number of times PANEL was opened / closed.
•Displays forced Power OFF data.
2. After the initialization process is completed, the following is
displayed.
When successfully completed:“CD_O___”.
When finished but unsuccessful:“CD_X___”
3. This mode is cancelled by resetting. (The last screen will
not be retained.)
●Clearing DC offset error detection data (E2PROM
data clearing)
If DC voltage difference (DC offset error) is detected between
audio power amplifier (power IC) ±outputs, “DC_ERR_” is dis-
played on the display.When this occurs, the audio is forced-
mute and the display displays only “DC_ERR_”.
TEST MODE

KDC-232MR
12
TEST MODE
Once this product detected a DC offset error, even if it is re-
started (or reset), its display displays “DC_ERR_”.
However, if the error is detected while in Test Mode, it is not
saved in E2PROM.
1. Press and hold [3] and [6] keys and reset-start to go into the
DC offset error display mode
(While “– – – –”is being displayed, power can be ON for 30
minutes.)
2. While in STANDBY source, the current DC offset error con-
dition is displayed.
Error detected:“DC_ERR___”
Error not detected:“DC_OK___”
3. While error condition is being displayed, press [AUTO] key
to clear the detection data.
(Clear E2PROM)
4. CD offset error display mode is cancelled by resetting.(The
last screen will not be retained.)
●FM/AM channel space switching
While Power OFF, press and hold [1] and [5] keys and press
[SRC] key to Power ON.
●FAST4 software-mute adjustment mode
1. Press and hold [1] and [6] keys and reset-start to go into the
FAST4 software mute adjustment mode.
Default setting LOUD: OFF
FM band reception frequency: 98.3MHz
2. While in STANDBY source, “TUN_ADJ”,
While in TUNER source, “S- ∗ _D- ∗ ” is displayed.
3. While in TUNER source, press [FM] / [AM] / [ ] / [ ]
keys to input the adjustment value.
•Start point: [ ] / [ ] keys (0-7) “S- ∗ ”
•Convergent point : [FM] / [AM] key (0-F) “D- ∗ ”
•Press the [4] key and call up 98.3MHz.
4. Press and hold [6] key for 2 seconds or longer to write the
adjustment value into E2PROM, and “EP_WRITE” is dis-
played.
5. This mode is cancelled by resetting.
●Settings for OEM
Use pin 2 on the system µ-com to support OEM model.
TUN TYPE1 TUN TYPE2 Description
(Pin. 5) (Pin. 6)
Low Low qKENWOOD brand model
High Low wKENWOOD brand model (with CRSC
changed)
Low High eOEM model (with CRSC changed)
High High rKENWOOD brand model (to support
test-driving in EU)

KDC-232MR
13
ADJUSTMENT
After replacing the following parts, adjust as follows.
REPLACED PARTS ADJUSTMENT ITEMS
Ref. No. Function / Parts name 1st AM MIX 2nd AM MIX FM antenna
IC10 E-VOL & TUNER YES YES YES
IC11 E2PROM YES YES YES
L507 VCO COIL YES YES YES
L508 1st AM MIX IFT YES - -
L509 2nd AM MIX IFT - YES -
L518 FM ANTENNA COIL - - YES
D504 VARIABLE YES YES YES
CAPACITANCE DIODE
D506 VARIABLE YES YES YES
CAPACITANCE DIODE
X501 CRYSTAL RESONATOR YES YES YES
●1st AM MIX / 2nd AM MIX ADJUSTMENT
ADJUSTMENT POINT : L508 (1st AM MIX) / L509 (2nd AM
MIX)
VOLTAGE VALUE CHECK POINT : S-METER check land (X34-)
Adjust so that S-METER voltage value becomes maximum.
• SG setting
DESTINATION FREQUENCY MODULATION ANTENNA INPUT
Europe 999kHz OFF 35dBµV (EMF)
Except Europe 1000kHz OFF 35dBµV (EMF)
●FM ANTENNA ADJUSTMENT
ADJUSTMENT POINT : L518
VOLTAGE VALUE CHECK POINT : S-METER check land (X34-)
Adjust so that S-METER voltage value becomes maximum.
• SG setting
DESTINATION FREQUENCY MODULATION ANTENNA INPUT
Europe 87.5MHz OFF 5dBµV (LOAD) or
11dBµV (EMF)
Except Europe 87.9MHz OFF 5dBµV (LOAD) or
11dBµV (EMF)

KDC-232MR
14
ABCDE
1
2
3
4
5
6
7
PC BOARD (FOIL SIDE VIEW)
J1/L51
BU+5V
LXCLK
LXDATAM
LXDATAS
DAT
A
CL
K
R312
W355
W345
L61
L3
C409
C51
C71
C78
C79 C80
C117
C258
W340
W398
R72
R73
W337
W365
X1
C1
C2
C3
C5
C
W403
L51
W425
R21 R58
W388
W426
R59
W408
W378
W376
W402
W
X2
X3
W419
W423
W424
W351
W418
W352
W405
W406
W416
W385
W390
W377
W379
W381
W362
W357
W387
W383
W375
W393
W391
W427
W31
2
W413
W414
W409
W415
W417
W404
W421
W422
C119
R363
L101
W395
W410
W407
W412
W401
W397
W396
W389
W374
W354
W373
W358
W318
W327
W353
W
W399
R81
W380
W392
W382
W386
W349
W321
W346
W333
W363
W366
W347
W350
W342
W359
W338
W371
W341
W360
W326
W394
W372
W420
BE
W370
W356
W329
W343
W344
W368/
W384
W328
W369
W364
W361
W339
W348
C201
R57
R61
R85
R364
R365
R366 C52
C410
R412
R414
R416
R419
R420
R441
R453
R454
C72
C73
C74
C75
C76
C77
C81
C112
C113
C407
C408
C411
C420
C565
R130
R52
R53
R56
R82
R19
0
R191
R193
R194
R252 R257
R367
R411
R413
R415
R417
R418
R440
L301
R456
R471
W70
C55
C116
W58
W81
R51
R54
R55
R60
R75
R76
R77
R78
R83
R86
R87
R88
R89 R90
R112
R113
C118
R178
R180
R181
R18
2
R251
R255
R256
R271
R272
R273
R351
R352
R353
R355
R356
R357
R358
R359
R360
R368
R369
R370
R371
R431
R432
R433
R437
R438
R439
R450
R451
R452
R457
R470
TH1
R131
W71
W67
W98
W61
C152
W59
W60
R114
R199
R372
W63
W57
W66
W62
W65
W64
W
R480
W53
W51
26
81
112
224
123
16 9
27
W841
W842
W9
6
W97
W91
W82
R313
R135
W99
R133
R136
R137
R138
R140
R139
R141
C153
R151
C422
W102
RST
SCL
TEST
BU5V
AFS
ADJ
DATA
OEM-DATA
OEM-CE
OEM-CLK
5
1
4
8
18
9
16
1
20
21
40
41
60 61
80
12
3
4
BE
BE
EB
CC
CC
BEE
BEE
BE
BE
D77
D57
D71
J1/
D52
D54
D259
D260
Q72
D254
D73
CN2
Q155
D72
D75
D251
D252
D253
D255
D256
D257
D258
D401
Q71
Q51
Q52
Q74
Q252
D53
D55
D76
D261
Q53
D74
D402
D403
D81
IC4
IC3
IC6
IC1
IC8
IC7
ELECTRIC UNIT X34-4160-12 (J76-0048-42)

KDC-232MR
15
JIHGF
1
2
3
4
5
6
7
Refer to the schematic diagram for the
values of resistors and capacitors.
X34-4160-12
Ref. No. Address
IC1 6D
IC3 4B
IC4 2E
IC6 4D
IC8 6D
IC10 5G
IC11 4F
IC15 6G
Q51 3D
Q52 3D
Q53 3D
Q71 3C
Q72 2B
Q151 6H
Q155 6D
Q252 3E
Q330 3G
Q351 3G
Q352 3H
Q501 4H
DATA
CLK
W322
R596
R598
W345
C562
R600
C515
R601
W833
W310
C96
C97
C255
C256
C258
C505
C507
C508
C512
C547
C563
C584
C600
CF51
CF52
CF53
CF54
W340
W300
L4
L505
L506
L507
L508
L605/R607 W835/
L604/R608 W834/
L509
L518
W301
W337
W251
C6
C3 C4
C257
C303
C331 C332
W306 L501
L502
L503
L504
L520
W334
W330
W324
W320
W332
R338
R339
W315
R544
R523 C542
W308
R597
W801
W317
X501
W312
W335
W318 W302
W304
W305
W307
W309
7
W336
W314
W311
W313
W349
W316
W321
W
346
W331
3
33
W319
W347
W350
W
342
W341
6
W
343
W
344
W323
W325
W
328
W339
W348
W303
R172
C551
C579
C556
R605
W152
C333
C334
C503
C506
C509
C510
C511
C513
C516
C517
C518
C519
C520
C623 W803
C521
C522
C526
C527
C531
C543
C545
C548
C553
C603
C554
C559
C561
C568
C582
C583
C585
C586
C587
C627
C588
R562
C589
C590
W820
C601
C604
C605
C606
C628
W92
R97
R190
191
R254
2
57
R335
R336
R504
R506
R565
C626
C301
C302
C502
C504
C514
C524
C525
C541
C544
C549
C550
C564
C581
L521
W81
R96
R98
R152
R153
R156
R157
R158
R159
R160
R161
R162
R163
R164
R178
R182 W94
R301
R302
R303
R304
R305
R306
R307
R308
R309
R310
R311
R332
R435
R436
R501
R502
R503 R505
R507
R520
R521
R522
R543
R545
R546
R561
W840
R566
C620
R567
R589
R590
R591
R592
R603
R594
R602
W69
W252
L600
W67
W73
R
480
W87
C602
W506
W804
W812
W814
C610
R599
W604
W611 W805
W605
W802
W832
W826
R331
W75
L
9106751
2
51
51
115
214
24
123481211 13 R
R253
W72
W96
W78
W93
L601
C552
W76
W80
W79
W68
W88
W85
W89
W86
W90
L602
R99
W808
W831
R606
W807
C624
C625
R100 TUNOUT
AFS
VT
SD
S-METER
14
5
8
1
20
21
40
41
60 61
80
B
E
EB
G
SB
C
BE BE
D301
D302
D303
D304
D305
D306
J2
J5
J6
D162
P1
D203
J4
WH1
CN3
Q151
Q330
D3
D501
D504
D506
Q351 Q352
D502
D503
Q501
4
IC15
IC10
IC11

KDC-232MR
16
KLMNO
1
2
3
4
5
6
7
PC BOARD (COMPONENT SIDE VIEW)
Refer to the schematic diagram for the values of resistors and capacitors.
X32-5750-00
Ref. No. Address
IC2 4N
IC4 2N
Q6 5M
C10
C14
C15
C31
C33
C36
C41
C42
C43
C44 C45
C46
C47
C48
C50
C61
C62
C71 C72
C73
C74
C75 C76
CP1
CP2
R9 R10
R31
R36 R37
R39
R40
R41
R42
R46 R47
R49
R50
R53
R81
R82
R83
R84
R85
R86
R87
R88
X1
14
85
120 21
40
41
60
61
80
EB
D3
Q6
S1
S2
S3
S4
IC2
IC4
CD PLAYER UNIT X32-5750-00 (J76-0059-12)

KDC-232MR
17
TSRQP
1
2
3
4
5
6
7
PC BOARD (FOIL SIDEVIEW)
Refer to the schematic diagram for the values of resistors and capacitors.
X32-5750-00
Ref. No. Address
IC1 5R
IC3 2R
Q1 5S
Q2 4S
Q3 4R
Q4 3Q
Q5 5Q
CN1
D1
D2
Q1
Q2
Q3
Q4
Q5
CN2
IC1
IC3
CD PLAYER UNIT X32-5750-00 (J76-0059-12)
C1
C2
C3
C5
C6
C7 C8
C9
C11
C12
C13 C16
C17
C18
C32
C34
C37
C38
C39
C40
C49
C51
C52
C77
C78
CP3
CP4 CP5
R1
R2
R3
R4
R5
R6 R7
R8 R11
R12
R13
R14
R15
R32
R33
R34
R35
R38
R43
R44
R45
R48
R51
R52
R71
R72
R89
R90
R91
R92
R100
C101C102
C100
FCS
SLED
SPDL
FBAL
RW SPL
TRD
TVD
FOD
PON
1
GND
IOP+
RF F
ARF E
D/ARF
16
PD
BU.5V
IOP- TE
SBIO
RFENV
TRCRS
OFT
BDO
PWM
FE
B/TE
TBAL
LDON
A/TE
VDET
+
LD
K24
24
SPDL-
SPDL+
A.GND
Lch
A.+8V
Rch
S.7.5V
S.GND
MOTOR
LO/EJ
8EJE
GND
SLED OUT
/LOAD
SLED IN
/EJECT
TRK IN
TRK OUT
FCS DOWN
FCS UP
D.GND
B
CA
VR
VCC
/MUTEL
/MUTER
12EJE
D.OUT LOS
LOE/LIM
1
/CLK
DATA
LDCNT
/MRST
/MSTOP
NRFDET
GCTL
TRK
DRVMUTE
AA
115
16
30
1
16
32
17
Vref
Vref
Vref 2
EB
EB
EB
EB
EB
P51
P50
P53 P54
P52

KDC-232MR
18
UVWXY
1
2
3
4
5
6
7
Refer to the schematic
diagram for the values of
resistors and capacitors.
(FOIL SIDEVIEW)
PC BOARD
(COMPONENT SIDE VIEW)
X16-3500-11
Ref. No. Address
IC1 4X
Q21 3X
C67
ATT
VOL
AUDIO
66 18
171
AUTO Q
123 456 SRC
RST
EJECT
G
VO VCC FM+
AM-
C68
D65
D70
D31
D32 D33
D34
D35 D36
D37
D38
D39
D40
D41
D42
D43
D44
D45
D46
D47
D48
D49
D50
D51
D52
D53
D54
D61
D62
D63D64
D97
D9
S11 S12
IC3
ED1
SWITCH UNIT
X16-3500-11 (J76-0166-02)
SWITCH UNIT
X16-3500-11 (J76-0166-02)
C66
C10
C11
C12
R61
R62
R63
R78
R23
C15
C21
C61
C62 W3
CP11
R70
R84
R83 R82
R80
R1
R2
R11
R13
R14
R15
R16
R17
R18
R19
R21
R22
R31
R32
R33
R34
R72
R74
R75
W1
W2
R81
1
214
BE
BE
EB
EB
115
BE
80
2021
6160
40
41
Q23
D78
Q22
D71
D72
D73
D74
D75
D76
D77
D96
Q1Q2
Q21
J1
IC1
FL SW11.25V
ESD GND
TDF DET
RTRY
CCW
REMO
DATAS
CLK
CE
VFD
DATAF
VFD RST RST
LED+B
FL+B
RTRY
CW
PAN5V
ILL D GND
PAN SW5V
KI1
KI2
KI3
KI4
KI5
KS1
KS2 KS3
KS4

KDC-232MR
19
ABCDE
1
2
3
4
5
6
7
X34-4160-12 (1/4)
P1
D162
D506
J5
D502
D503
D501
D3
J4
Q501
REMOTE
WIRED
D504
∗
A
∗
CN3
Q222
Q221
Q225
CN91
CN90
to 2-PRE OUT
DTA124EUAQ225 ::Q221,222 DTC143TUA(X89- )
E-VOL & TUNER
2-PREOUT
MUTE
RDS DECODER
ANT.
AM RF
AMPLIFIER
KDC-MP2032/MP4533 ONLY
MPTC
GNDVCC(DIG) GNDVCC3(PLL)
C589
C116
330P
10u35
8
7
6
5
4
3
2
1
C117
10u35
TP314 FSELFILOUT
C118 C119
0.01
9
10
11
12
13
14
15
16
OSCINMPX
EXTRES
ARI
GND
OSEL
TM
VCC
OSCOUTVREF
RDDA
QUAL T57
RDCL
4.7uH
L101
C113
10P
C112
10P
TP317
R114
R113 2.2K
R112 2.2K
TP501
R544 2.2K
R543
5.6K
C541
270P
L507
8P
C543
C610
1P
5P
C542
15P
C544
VFD DATAS
REMOTE
RTRY CCW
TDF DET
ESD GND
13
14
15 1
12
TP166
1K
2.2K
1K
TP164
TP163
TP162
2.2K
TP161
2.2K
2.2K
2.2M
R193 XTALG
10.250MHz
X501
0.033
C549 2200P
R546 4.3K
R545 33K
C553 0.1
C559 3300P
C548
0.022
C547
22u16
0.01
C623
0.01
10
0.1
R606
23
22
21
26 25
24
29 28
27
VCCVCO
LPHC
VCOE
GNDVCO
20
LP LPOUT
VCOB
WINTC2
19
18
17
16
VCC3(PLL) VREF2 ISSTC1 ISSTC2
R567 1K R566 1K 32
31
30
34
33 SDA
XTALD SCL
R507
C504
0.01
1000P
C521
L505
0.33uH
C522
C626
1000P
R520
220 R521
1.5K
18P
C524
15P 0.33uH
C525 L520
C516 L501
10P
C503 0.1
C505
4.7u35
C502
L502
33uH
1500P
R501
6.8K
6.8uH
R502
2.2K
L518
100P L521
10NH
C604
C518 C520
1
C517
0.47
C606
C605 1P
L506
100P
R503
2.2K
C507
22u16
C506
1K
0.68
C510 100P
C509 68P
R504
4.7
C508 22u16
1K
C602 150P
L600
TP506 L4
R505
L503
1000uH
R594
10
R605
10 100uH
TP507
1K
∗R172
TP345
C581
VCCIF1(IF1)
IF1AMP1OUT
IF1REF
IF1AMP1IN
GNDIF1(IF1AMP)
IF1AGCIN
FSTC
AMAGC2TC
MIX1OUT2
C519
1
0.47
C531
1
R603 56
C514
GNDRF
FMMIX1IN2
WINTC1
FMAGCTC
TV1
15
14
13
12
FMMIX1IN1
FMPINDR
11
10
9
8
AMRFAGCOUT
4
AMPINDR
AMMIX1IN1
AMMIX1IN2
7
6
5
DEVTC
MUTETC
MIX1OUT1
3
2
1
0.47u50
C563
R599
22
C582
0.022
78 79 80 75 76 77 72 73 74
0.1
100P
C579
0.01
FMMIX2IN1
FMMIX2IN2
AMRFAGCTC
IF1AMP2OUT
AMDETC
AMREFDEMC
IF1AMP2IN
1u50
0.022
3900P
0.068
69 70 71 66 67 68 65
L508 10.700MHz
CF51 10.700MHz CF52
10.700MHz
CF53
13
14
65
9
R162
R163
R164
R191
R182
R181R161
470K
R597
C551
10
R596
6800P
C545
C550
R522
22K 1000P
C527
0.01
C625
L504
R506 1M
C601
C515 C590 C583
C587
64
32
34
2.2K
X3
4.332MHz
21
SW5V
VCC1 (DIG)
C222
C221
10u16
270
R221
10u16
270
R222
R225
TP2
100
R229
R226
30K 30K
TP3 100
R230
TP1
W101
MUTE
GND
2 VDD
1
5
4
3
FR
FL
1
2
3
TP8
TP6
TP5
TP4
TP7
GND
R
L
390K
R565
C554 0.33
0.01
C513
1.2K
R602
C511
2200P
C584
1
R598
10
C627
100
1
C585
∗C603
2P
1P
47P
L604
L605
R523
10
C628
1
+
+
+
+
+
+
+
+
+
+
IC7
IC10
ELECTRIC UNIT (X34-416x-xx)
DAUGHTER UNIT (X89-2690-10)
4.7K
4.7K
22K
22K
0
5
5V
0V
FM : 0V
4.6V
0V
AM : 0V
0V
0V
3.3V
3.9V
8.1V
4.0V
4.7V
4.0V AM : 5.9V
FM :5.9V
0V
4.0V
2.5V
0V
8.1V
0V
0V
0V
8.1V
2.2V
1.8V
8.1V
4.3V
3.8V
2.0V
2.0V
0V
3.5V
8.2V
7.8V
0V
5V
0V
5V
0V
2.5V
5.0V
2.5V
0V
FM : 4.3V
AM : 5.5V
AM : 0V
FM : 2.4V
AM : 1.8V
FM : 0V
FM :
AM :
AM : 3.5V
FM : 0V
AM : 4.3V
FM : 3.7V
AM : 3.0V
FM : 0V
AM : 4.9V
FM : 4.5V
AM : 4.2V
FM : 0.2V AM : 3.1V FM : 0V
AM : 0V
FM : 4.0V
AM : 4.1V
FM : 5.2V
8.1V
2.8V
5.0V
4.3V
4.3V

KDC-232MR
20
FGHIJ
X34-4160-12 (2/4)
CN2
Q151
Q155
D403
D203
D401
DSI
2/2 X16-
J1
SYSTEM u-COM
PANEL
5V SW
DSI
ILLUMI SW
E2PROM
MUTE
LOGIC
to CD PLAYER UNIT (X32- )
D1
D2
IC
RDS QUAL
TUNER FUNC OUT
PWIC MUTE
PWIC STBY
PS1 3
RDS AFSL
100K
R371 4.7K
GNDVCC(DIG)
FSU
C600
L601
100u10
R590
TP157
VFD DATAF
VFD CE
VFD CLK
VFD DATAS
REMOTE
10
11
12 8
9
1K
TP162
2.2K
2.2K 2.2K 2.2K
TP161 TP160 TP159 TP158
2.2K
2.2K 2.2K
470
ILL D GND
PAN5V
RTRY CW
(LED+VFD)
FL+B(FIL)
VFD RST
RST
5
6
72 3
41
C153
1
R153
R156 1K
R157 2.2K
TP156
TP154 TP155
TP153
100K
R194
R152
TP152 TP151
C620
1
OUTRR
WININ
SSTOP
DCOUT
R567 1K R566 1K 32
35
34
33 38
37
36 40 39
IN1L SDA SCL OUTFR IN1R IN1C OUTRL OUTFL
TP510
41
42
43
44
45
TP431
R199
240
TP375
4
1
A2 A1 A0
3
2
SCL
WP
VCC
GND SDA
TP430
47K
R592
22K
5 8 6 7
10K
R436
10K
R453
47K
42
41
40 PS1 1
PS1 2
PS2 1
PS2 2
NC
BU DET
39
38
37
L602
C564 0.47
C568
270P
450.000kHz
CF54
GNDVCC2(TUN)
AMMIX2OUT2
AMMIX2OUT1
VCC2(TUN)
FMMIX2IN1
FMMIX2IN2
SMUTE
QUALITYOUT
APVCC
MPXIN
MPXOUT
AMIFREE
(FMEDEM)GNDDEM
GNDDEM
AMIFIN
VREF1
FSW
AFS
46
47
48
49
IN2R
IN2L
50
51
52
53
C561 0.1
57
54
55
56
58
59
60
C586 1
C588 0.47
R601
0.022
66 63 64 65 61 62
C512
10u16
C624
0.01
L509
M
Hz
3
R591
51K
100K
4.7K
R561
TP504
TP414
TUNER ADJ
R438 1K
R437 1K
VOL MUTE
RDS DATA
ACC DET
VSS1
36
35
34
33
RESET2
32
31
30
29
LX REQ M
AUD SCL
AUD SDA
28
27
26
25
LX CON
LX RST
SD
24
23
22
21
R432
4.7K
TP410
TP409
19 20 R439
∗R431
2.2K
VCC
1
2
3
4
R456
GND
8 5 7 6
R312
100K
R313
CD MUTE L
14
CD SDA
CD LOS SW
CD DISC12
23
D-OUT
CD SCL
21
CD MUTE R
AUDIO+B
GND
17
Lch
19
Rch
15
2024 22 18 16
DGND
CD LOE LIM
SW
CD MSTOP
CD MRST
1113
BU5V
9
CD LOEJ
D5V
5
D5V
DGND
7
812 10 6 4
0.47u50
470 470
R352 2.2K R351 2.2K
R370 4.7K
0.47u50
R363 4.7K R358 2.2K
R356 1K R355 1K R353 1K
R359 100
∗R450 470 ∗R451 470 ∗R452 470
TP406 TP405 TP407
CD LOS SW
54
53
52
51
50 49 48
47
46 45
44
43
CD LOEJ CD LOE LIM SW CD MSTOP CD MUTE NC NC CD DISC12 SW CD MRST NC CD MOTOR CD SCL
60 59 58
57
56 55
RESET OEM DISP DATA OEM DISP CLK OEM DISP CE CD SDA DSI
R366 4.7K
R365 4.7K
R367 100K
DC ERR
LINE MUTE
ROTARY CW
AVSS
TUNER TYPE1
TUNER TYPE2
AVREF1
VFD DATAF
VFD DATAS
VFD CLK
VFD RST
VFD CE
ROTARY CCW
TDF DET
PWIC BEEP
LX DATA S
LX DATA M
LX CLK
16 17 18 13 14 15 10 11 12 7 8 9 4 5 6 1 2 3
53
54
52
55
45 46
51
47
48
R
L
C2
C1
60 65
10
9 8
12
11
3
63
R158
R162
R178 R190
R182
R181
R180R160
R161
470K
2.2K
10
FR
FL
RL
L
R
G
R597
C601
RR
21
1
80
19
R435R589
(STD & AP)GND STEREO
2.2
R600
0.01
C562
10u16
C556
R
L
53 47
48 46 45 52 49
51
55
54
41
42
39
40
38
1
1
9
14
12
13 10
11
8
18
17
16
22K
24
23
22
21
2
0.01
C201
19
66
27
29
R454
4.7K
34
32
+5V
FL+B
+5V
+8V
SW5V SW5V
+8V
10
+8V
SW5V
7
35 36
LED+B
SW SW
CD DISC8
R159
79
VCC1 (DIG)
2
15
43
3
3,43
C565
W826
+8V-A
1
R368 R369
1
C585
APGND
VCC STEREO
FMREFDEMC
FMREFDEMC
10K
C552
2200P
1K
R151
L301
3
TUNER
TP352 TP351 TP354 TP353 TP355 TP357 TP356 TP358 TP360 TP359 TP361 TP362 TP363 TP364 TP365 TP366 TP367 TP369 TP371
+
+ +
+
+
IC11
IC6
∗IC1
A
47K
10K
0V
3.4V
0.4V
1.6V
4V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
0V
5V
0V
0V
5V
0V
5V
0V
0V
5V
0V
4.9V
0V or 5.0V
0V
5V
0V 0V
5V
5V
0V
0V
5V
5
0
0V
0V
0V
0V
5V
0V
5V
0V
5V
0
5
4.0V
0V
0V
5V
4.0V3.0V
8.1V
4.0V
0V
5.0V
0.2V
3.4V
5.0V
3.3V
0.6V
3.8V
8.1V
3.0V
0V
3.0V
0V
8.1V
0V
5V
5.0V
0V
0V
0V
0V
4.5V
0V
0V
5V
5.0V
5.0V
5.0V
0V
0V or 5.0V
0V or 5.0V
1
V
0V
4.0V
AM : 4.1V
FM : 5.2V
AM : 8.0V
FM : 8.1V
5.0V
0V
5V
5V
0V
FM : 0V
AM : 3.75V
AM : 3.8V
FM : 0V
3.0V
0V
5V
5V
0V
5.0V
0.5V or
5.0V
5V
0V
4.3V
4.3V
5.0V