Kenwood KDC-138 User manual

This product uses Lead Free solder.
This product complies with the RoHS directive for the European market.
SERVICE MANUAL
© 2008-1 CREATED IN JAPAN
B53-0608-00 (N)0
X34-56xx-xx
New ELECTRIC UNIT (X34-) for 2008 CD RECEIVER
ELECTRIC UNITs for the following 2008 CD receivers which are produced after November of 2007
are changed as follows. This service manual is only for the changed new ELECTRIC UNITs.
DESTI-
NATION
DISPLAY
TYPE MODEL OLD X34- NEW X34- SERIAL No. FROM
ORIGINAL
SERVICE MANUAL
K 7-SEG LCD KDC-138 X34-5640-10 X34-5670-10 71109301 / 71200001 KDC-138/...............
K 7-SEG LCD KDC-138CR X34-5640-11 X34-5670-11 71200001 KDC-138/...............
K 14-SEG VFD KDC-MP208 X34-5640-14 X34-5670-14 71103501 / 71208401 KDC-MP208/..........
K 14-SEG VFD KDC-MP238 X34-5640-12 X34-5670-12 71106402 / 80100001 KDC-MP208/..........
K 14-SEG VFD KDC-MP238CR X34-5640-13 X34-5670-13 71200001 / 80100001 KDC-MP208/..........
M 7-SEG LCD KDC-139 X34-5640-21 X34-5670-21 71110201 KDC-138/...............
M 7-SEG LCD KDC-139S X34-5640-21 X34-5670-21 - KDC-138/...............
M 14-SEG VFD KDC-MP239 X34-5640-23 X34-5670-23 71200001 KDC-MP208/.........
M 14-SEG VFD KDC-MP3039 X34-5640-23 X34-5670-23 - KDC-MP208/.........
M 14-SEG VFD KDC-MP339 X34-5640-23 X34-5670-23 - KDC-MP208/.........
M 14-SEG VFD KDC-MP339S X34-5640-23 X34-5670-23 - KDC-MP208/.........
M 14-SEG VFD KDC-MP439 X34-5640-22 X34-5670-22 V1100701 KDC-MP208/.........
E 14-SEG VFD KDC-241SA X34-5652-70 X34-5682-70 V1101001 KDC-241SA/..........
E 14-SEG VFD KDC-241SG X34-5652-70 X34-5682-70 W0100001 KDC-241SA/..........
E 14-SEG VFD KDC-W241AY/GY X34-5652-71 X34-5682-71 V1110501 KDC-W241AY/......
E 14-SEG VFD KDC-W3041A/G X34-5652-72 X34-5682-74 V1101601 KDC-W241AY/......
E 14-SEG VFD KDC-W3041AY/GY X34-5652-73 X34-5682-75 V1102501 KDC-W241AY/......
E 14-SEG VFD KDC-W312A/G X34-5652-72 X34-5682-74 V1101601 KDC-W241AY/......
E 14-SEG VFD KDC-W312AY/GY X34-5652-73 X34-5682-75 V1102501 KDC-W241AY/......
E 14-SEG VFD KDC-W312SAY X34-5652-73 X34-5682-75 V1102501 KDC-W241AY/......
KDC-138 KDC-MP208
KDC-W241
KDC-241

Parts with the exploded numbers larger than 700 are not supplied.
EXPLODED VIEW (UNIT)
2
X34-56xx-xx
BLOCK DIAGRAM
2
16
1
FRONT/
P.ON FL
BU DET
PHONE
ACC DET
RST
PHONE
ACC DET / BU DET
PS1-1 / PS1-2 / PS1-3
P.ON FL
PS2-1 / PS2-2
9
5
BU DET
1
2
MUTE
R11-15
12
3
3
3
1
ROM CORRECTION (NOT USED)
1
REAR/SW
111
P-ANT
P-CON
B.U.
ACC
PHONE
SP-OUT
PS2 1 / PS2 2
PS1 1 / PS1 2 / PS1 3
R103
1
E-VOL
IC2
A8V
SYSTEM u-COM
BU
POWER
Q701,702
PRE-OUT
PHONE
ACC-DET
Q101
SURGE-
Q103
BU-DET
Q102
Q2
DC-CN
A8V
SERVO+B
D5
BU5
SW5
DET
DC-CN etc
PAN5V
RESET IC
IC8
ILLUMI+B
CN
IC1
IC6
J1
+B
ILLUMI
ILLUMI+B
AM+B
J5
MUTE
Q705
J2
A1
SERVO+B
A8V
BU5
1/2W
Rx5
Q301
BU5
BU5
DME1
BU5
CD
SERVO
IC
SW5
AM+B
A8V
TUNER
FRONT-END
ANT.
DECODER
RDS
IC7
SW5
E2PROMSW5
BU
MECHA
CD
PRE-OUT
MUTE
BU5
SW5
BU5
SW5
SW14V
FL+B
IC4
POWER
SUPPLY
IC
FL+B
J3
BU5
IC10
Q8,9
Q7,10
ELECTRIC UNIT (X34- )
2
CD
3
(X34-)
(X34)
A1 L
F
G
H
J
L
: N80-3010-48
: N83-3005-48
: N83-3016-48
: N86-2606-48
: N89-3010-48
J
Hx2
L
GF
(X34)
786

3
X34-56xx-xx
COMPONENTS DESCRIPTION
●ELECTRIC UNIT (X34-56xx-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 System μ-COM Controls FM/AM tuner, the changer, CD mechanism, panel, volume and tone.
IC2 E-VOL Controls the source, volume and tone.
IC4 Power Supply IC Outputs 5Vx2, 8.1Vx2, 10.2V, P-CON and P-ANT.
IC6 Power IC Amplifies the front L/R and the rear L/R to 50W maximum.
IC7 RDS IC RDS decoder.
IC8 Reset IC Lo when detection voltage goes below 3.6V.
Q2 Servo+B AVR When Q3’s base goes Hi, Servo+B AVR outputs 7.5V.
Q3 Control SW for Servo+B ON when the base goes Hi.
Q7 VFD+B SW ON when the base goes Hi.
Q8 VFD+B AVR When Q9’s base goes Hi, Servo+B AVR outputs 10.5V.
Q9 Control SW for VFD+B ON when the base goes Hi.
Q10 VFD+B SW ON when Q7’s base goes Hi.
Q11 14V SW ON when the base goes Hi.
Q12 14V SW ON when the base goes Lo.
Q13 Control SW for IC4 ON when the base goes Hi.
Q14 Control SW for IC4 ON when the base goes Lo.
Q101 ACC DET ON when the base goes Hi during ACC is applied.
Q102 Serge DET When the base goes Hi, surge voltage is detected.
Q103 BU DET ON when the base goes Hi during BU is applied.
Q104,105 Mute Control ON when the base goes Hi.
Q301 Panel 5V SW ON when the base goes Lo.
Q701~704 Pre-out Mute SW When a base of the 4 transistors goes Hi, pre-out is muted.
Q705 Mute Driver for Pre-out ON when the base goes Lo.
Q801
Electric Discharge Circuit for C805 (SVR) ON when the base goes Lo.

4
X34-56xx-xx
●SYSTEM μ-COM: IC1 on X34- (ELECTRIC UNIT)
Pin No. Pin Name I/O Application
Truth Value
Table Processing Operation Description
1 LX DATA M I/O Data to slave unit Pull-down (GND)
2 LX CLK I/O LX-BUS clock 125k~65kHz
3~5 NC - Not used Output L fixed
6 REMO I Remote control signal input Detects pulse width
7 NC - Not used Output L fixed
8 BYTE - Memory extended bus width setting Connects to VSS
9 CNVSS - Connects to VSS
10 XCIN - 32.768kHz
11 XCOUT - 32.768kHz
12 RESET - L: Reset
13 XOUT - 10.0MHz
14 VSS -
15 XIN - 10.0MHz
16 VCC1 -
17 NMI I Connects to VCC
18 CN DET I Panel communication detection H: Panel detached, L: Panel attached
19,20 NC - Not used Output L fixed
21 ROMCOR DET I E2PROM writing request H: Writing
22,23 NC - Not used Output L fixed
24 PON FL O Key illumination power supply control ON: H, OFF: L
25 NC - Not used Output L fixed
26 PON PANEL I/O Panel 5V control ON: L, Momentary power down/Panel detached:
Hi-Z, 11 minutes after ACC OFF: Hi-Z
27,28 NC - Not used Output L fixed
29 AUD SCL I/O E-VOL clock output
30 AUD SDA I/O E-VOL data input/output
31 VFD SYS DATA O VFD data output
32 VFD PAN DATA I VFD data input
33 VFD CLK O VFD clock output 125kHz
34 VFD BLK O VFD data blanking output
H: Reset cancelled, L: Reset, Momentary power down
/Panel detached: L, 11 minutes after ACC OFF: L
35 CD SI O CD mechanism serial output
36 CD SO I CD mechanism serial input
37 BUCK O Serial clock output 1MHz
38 CD LOS SW I CD loading detection
39 PIO0 I
Communication request from mechanism DSP H: Data request
40 CD SRAMSTB O 1M-bit SRAM standby H: SRAM standby
41 EPM I Flash EPM input Connects to VSS
42
CD LOE LIM SW I CD detection (Chucking SW) H: Loading completed, L: No disc
MICROCOMPUTER’S TERMINAL DESCRIPTION

5
X34-56xx-xx
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No. Pin Name I/O Application
Truth Value
Table Processing Operation Description
43 PON CD O CD mechanism power supply control H: Power ON
44 CD LOEJ I/O CD motor control qRefer to the truth value table
45 CD MOTOR I/O CD motor control qRefer to the truth value table
46 VFD CE O VFD control request
47
CD DRIVEMUTE O Motor driver mute output
48 CD CCE O CD mechanism chip enable
49 NC - Not used
50 CD MRST O CD mechanism μ-com reset H: Normal, L: Reset
51~53 NC - Not used Output L fixed
54 CD MUTE I CD mute request L: Mute request
55 CD DISC12 SW I 12cm disc detection Pull-up (B.U.)
56 ROTARY CCW I VOL key input Detects pulse width
57 ROTARY CW I VOL key input Detects pulse width
58~61 NC - Not used Output L fixed
62 VCC2 -
63 NC - Not used Output L fixed
64 VSS -
65 NC - Not used
66 TUN IFC OUT I Front-end IFC-OUT input H: Station found, L: No station
67 NC - Not used
68 MUTE I/O Mute L: Mute OFF, Hi-Z: Mute ON
69 NC - Not used
70 LX RST O Forced reset to slave unit H: Reset, L: Normal
71 LX CON O Start-up request to slave unit H: Slave unit ON, L: Slave unit OFF
72 LX MUTE I Mute request from slave unit H: Mute ON, L: Mute OFF
73 LX REQ M O Communication request to slave unit
74 NC - Not used
75 LX REQ S I Communication request from slave unit Pull-down (GND)
76 PWIC SVR O SVR discharging circuit During 500ms after power OFF and momentary
power down: H, Since then: L
77 PWIC STBY O Power IC standby control Power ON: H, Power OFF: L
78 PWIC MUTE O Power IC mute STANDBY source/Momentary power down: L,
TEL mute: L
79 ACC DET I ACC power supply detection ACC found: L, No ACC: H
80 BU DET I Detection of momentary power down
BU found: L, No BU/Momentary power down: H
(Operates after less than 4ms after momentary
power down is detected)
81~83 NC O Not used Output L fixed
84 TUN SMETER I S-meter input
85 TYPE1 I Destination switching
86 TYPE2 I Destination switching

6
X34-56xx-xx
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No. Pin Name I/O Application
Truth Value
Table Processing Operation Description
87 PWIC DC DET I DC offset detection
If DC offset is found 20 times in 100ms with condition
of over 1.0V, it will be judged as DC offset detected.
88 LINE MUTE I Line mute detection TEL mute: Below 1V, NAVI mue: Over 2.5V
89 NC - Not used
90 PS2 2 O Power supply IC control rRefer to the truth value table
91 PS2 1 O Power supply IC control rRefer to the truth value table
92 PS1 1 O Power supply IC control rRefer to the truth value table
93 PS1 2 O Power supply IC control rRefer to the truth value table
94 PS1 3 O Power supply IC control rRefer to the truth value table
95 NC - Not used Output L fixed
96 AVSS -
97 REF CON O VREF control Connects to VREF
98 VREF -
99 AVCC -
100 LX DATA S I Data from slave unit Pull-down (GND)
• Truth value table
qCD motor control
CD motor CD loading/eject
Stop L L
Load H L
Eject H H
Brake H Hi-z
rPower supply IC (IC4) control
SEL1 (Pin 10)
PS1-2 PS1-3 PS2-1 ILLUMI P-CON P-ANT
L L L OFF OFF OFF
L L H ON OFF OFF
H L H ON ON OFF
H H H ON ON ON
SEL2 (Pin 11)
PS1-1 PS2-2 AUDIO/SW5 AM
L L OFF OFF
H L ON OFF
H H ON ON

7
X34-56xx-xx
■Example
Key Description of display Description
5
Disc EJECT times display
EJCXXXXX Disc EJECT times display. MAX 65535 (times)
■5While disc EJECT times is displayed, press and hold for
2 seconds or longer to clear disc EJECT times.
A symbol “■” in the key column indicates that the key should be pressed and held for 1 second or longer.
■How to enter the test mode
Procedure Note
Press and hold the [1] key and [3] key and reset.
All lamps blink when it is detected that the sub-clock resonator is disconnected.
When having started up in the test mode, change the LINE MUTE inhibition time from 10 seconds to 1 second.
When operating in the test mode, even if a DC offset error occurs, detection information is not written in the E2PROM.
Forced disc ejection is prohibited in the test mode.
■How to clear the test mode
Procedure Note
Reset, momentary power down, ACC OFF, Power OFF, Panel detached. Clearing the test mode
■Test mode default condition
Description Default values
Source STANDBY
Display Display lights are all turned on.
Volume -10dB (“30” is displayed.)
Bass Boost OFF
CRSC OFF regardless of having/not having the switching function.
AUX ON (Only model equipped with AUX)
System Q NATURAL (FLAT)
Preout Rear
TEST MODE (7-SEG LCD)

8
X34-56xx-xx
■Special displays when all lights are on in STANDBY source
Key Description of display Description
Common All lights ON. All lights ON.
1
Destination terminal
condition indication TP11 “TYPE” indicates system μ-com (IC1) destination, and shows real-time condition of the destination terminal.
Development ID
condition indication 8:00701K Development ID – Version (system μ-com: IC1)
2 Serial No. display 00000000 Serial No. is displayed (8 digits)
3
Power ON time display
Pon 0HXX 00~50 is displayed for “XX”. When less than 1 hour,
displayed by displayed by increments of 10 minutes.
PonXXXXX 00001~10922 is displayed for “XXXXX”. MAX 10922 (hours)
■3When Power ON time is displayed, press and hold for
2 seconds or longer to clear Power ON time.
4
Disc operation time dis-
play
PLy 0HXX 00~50 is displayed for “XX”. When less than 1 hour,
displayed by increments of 10 minutes.
PLyXXXXX 00001~10922 is displayed for “XXXXX”. MAX 10922 (hours)
■4
While the disc operation time is displayed, press and hold for
2 seconds or longer to clear the disc operation time.
(Cleared only for displayed media.)
5
Disc EJECT times display
EJCXXXXX Disc EJECT times display. MAX 65535 (times)
■5While disc EJECT times is displayed, press and hold for
2 seconds or longer to clear disc EJECT times.
6
Panel open/close
times display
PC XXXXX PANEL open/close times display. MAX 65535 (times)
■6
Press the key for more than 2 seconds while the PANEL open/
close count is displayed and PANEL open/close count is cleared.
FM ROM correction version
display
0123 The number is the ROM correction version number.
ER When E2PROM is not installed.
–––– When not written in yet.
oooo When data not matched. (due to the difference in versions)
Audio data initialization InIT AUDIO setting value is re-set to the test mode default value.
Forced Power OFF
information display
POFF ––– No forced power OFF
POF F P n L Forced power OFF by communication error between system
μ-com and panel.
■ While the forced power OFF data is displayed, press and
hold for 2 seconds to clear the data.
CD information display
mode ON/OFF
For the display contents, refer to “CD information display
mode” in the next section.
■ While in CD information display mode, press and hold for
2 seconds or longer to clear all CD information.
TEST MODE (7-SEG LCD)

9
X34-56xx-xx
• CD information display mode
Key Description of display Description
FM
(forward
rotation)
AM
(reverse
rotation)
I2C com-
munication
status
ICOK I2C communication OK
ICER I2C communication NG
/ CD mecha-
nism error
log display
1:X X M – E R Mechanism error log 1 (Latest)
XX: Error number. “– –” is displayed in case there is no error.
2:X X M – E R Mechanism error log 2 (Latest)
XX: Error number. “– –” is displayed in case there is no error.
3:X X M – E R Mechanism error log 3 (Latest)
XX: Error number. “– –” is displayed in case there is no error.
/
CD Load
error
information
display
1:X X L D E R Load error switch 1
XX: Number of errors. “– –” is displayed in case there is no error.
2:X X L D E R Load error switch 2
XX: Number of errors. “– –” is displayed in case there is no error.
/
CD Ejection
error
information
display
1:XXEJER Ejection error switch 1
XX: Number of errors. “– –” is displayed in case there is no error.
2:XXEJER Ejection error switch 2
XX: Number of errors. “– –” is displayed in case there is no error.
3:XXEJER Ejection error switch 3
XX: Number of errors. “– –” is displayed in case there is no error.
4:XXEJER Ejection error switch 4
XX: Number of errors. “– –” is displayed in case there is no error.
/
CD time code
error count
data display
(Missing
counts)
LOSE CD time code error count data (Missing counts) mode display.
:X X C D D A Number of CD-DA count errors
XX: Number of errors. “– –” is displayed in case there is no error.
/
CD time code
error count
data display
(count not
updated)
STAY CD time code error count data (count not updated) mode display.
:X X C D D A Number of CD-DA count errors
XX: Number of errors. “– –” is displayed in case there is no error.
■Test mode specifications in TUNER source
Error is found in front-end (A1), etc. if indications below is displayed while in tuner source.
Status Display Description
Front-end (A1) E2PROM data error E2ER
Front-end (A1) E2PROM is still the default (unspecified) value.
Front-end (A1) communication error ICER Communication with front-end (A1) is not possible.
Destination mismatch TPER When destination is mismatch between front-end (A1)
E2PROM and the product.
• TUNER preset operation
Key Description of display Description
4 Preset function 9 8.3 Change to 98.3MHz with the preset key [4].
TEST MODE (7-SEG LCD)

10
X34-56xx-xx
• K3I forced switching
Every time when [6] key is pressed in tuner FM source, switched in the following order: AUTO →Forced WIDE →Forced MIDDLE →Forced
NARROW →AUTO. Default status is AUTO, and displayed as shown below.
Key Description of display Description
6 K3I Forced switching
A98.1 AUTO (1)
398.1 Forced WIDE (2)
298.1 Forced MIDDLE (3)
198.1 Forced NARROW (4)
• FST adjustment mode
Perform FST soft-mute adjustment.
Key Note
■ Enter the FST adjustment mode. (Press for 1 second or longer.)
Operations in the FST adjustment mode are as follows:
Key Description of display Description
FM
(UP)
AM
(DOWN)
/ Soft-mute adjustment SD– F 0 ↔7
Seek Stop Level
adjustment (Auto) ATn 0.00 (V) ↔5.00 (V). Normal (Local OFF)
Seek Stop Level
adjustment (Auto) ATL 0.00 (V) ↔5.00 (V). Normal (Local ON)
/ Seek Stop Level
adjustment (Manual) MN n 0.00 (V) ↔5.00 (V). Normal (Local OFF)
/ Seek Stop Level
adjustment (Manual) MN L 0.00 (V) ↔5.00 (V). Normal (Local ON)
■ Adjustment value
memory WR T Displays the data that has been written in the E2PROM when pressing the key for 2 seconds or longer.
Mode clear A98.3 Clear the FST adjustment mode. (Returns to normal
display and the test mode is retained.)
Switch Local Seek ON or OFF by briefly pressing [AUTO]/[TI] key when the Local Seek ON/OFF switching is allowed in the band.
After completing the FST adjustment, if you wish to clear the test mode, you can do this using the reset button.
■Test mode specifications in CD source
• Procedure in CD-DA media (KTD-02A)
Key Description of display Description
Track up procedure
Every time pressed, jumps to the track shown below.
No.9 →No.15 →No.10 →No.11 →No.12 →No.13 →No.22 →
No.14 →No.9 (recursive) But in case the disc has 8 tracks
or less, playback starts with track No.1.
Track down procedure Goes down by 1 track from the currently played track.
1 Jump procedure
Jump to No. 28 (Scratch 0.7mm for MUSIC line vibration testing)
2 Jump procedure Jump to No. 14 (Blurring surface disc TCD-731RA Tr14)
TEST MODE (7-SEG LCD)

11
X34-56xx-xx
Key Description of display Description
3
Information display
Mechanism model name
Mechanism version
6C000000
Display of Mechanism model name and Mechanism version.
(When key is pressed while the display in the left is being
shown, returns to normal display.)
6 Jump procedure Jump to No. 15. Set the volume value to “25”.
(For 20Hz 0dB DC protection false-operation FCT checking)
■Audio-related test mode
Procedure Note
Press the [AUD] key (main unit)
Press the [AUD] and [∗] keys (Remote control)
Enter audio adjustment mode (the initial item should be Fader, and then, Balance →
Bass Level →Middle Level →Treble Level →SW Level →System Q →V-Offset →
LPF Sub Woofer.
About audio adjustment items (include both Audio Function Mode and Audio Setup Mode)
Procedure Item Procedure Description
For item
forwarding
procedure,
press [AUD]
key and
[FM] key
Fader [VOL] knob and [ / ] key Adjust to 3 steps of R15 ↔0 ↔F15. (Default value: 0)
Balance [VOL] knob and [ / ] key Adjust to 3 steps of L15 ↔0 ↔R15. (Default value: 0)
Bass Level [VOL] knob and [ / ] key Adjust to 3 steps of -8 ↔0 ↔+8. (Default value 0)
Middle Level [VOL] knob and [ / ] key Adjust to 3 steps of -8 ↔0 ↔+8. (Default value 0)
Treble Level [VOL] knob and [ / ] key Adjust to 3 steps of -8 ↔0 ↔+8. (Default value 0)
LPF Sub
woofer [VOL] knob and [ / ] key Adjust to 2 steps of 80Hz ↔Through. (Default value: Through) (Only in models with Sub Woofer output)
Volume Offset [VOL] knob and [ / ] key
Adjust to 2 steps of -8 ↔0. (Default value 0) (Other than model with internal AUX)
Adjust to 3 steps of -8 ↔0 ↔+8. (Default value 0)
(Only models with internal AUX)
Procedure Note
Press the [B.BOOST] key for 1 second or longer Switch Bass Boost (Note: Front key functions as MENU.)
■[ATT] key operation
Procedure Note
In the TUNER source, press [ ] key ATT OFF/ON
■MENU-related test mode
Procedure Note
Press the [B.BOOST] key (main unit)
Press the [DNPP/SBF] and [DIRECT] keys (Remote control) Continuous forwarding by remote control is prohibited
■Backup current measurement
Procedure Note
While ACC OFF (Back Up ON), Reset MUTE terminal is OFF after 2 seconds, not after 15 seconds.
(During this time, the CD mechanism does not function.)
TEST MODE (7-SEG LCD)

12
X34-56xx-xx
■PREOUT switching (KDC-138/139/139S only)
Procedure Note
In the STANDBY source, press and hold [AUTO] key for
1 second or longer Switches PREOUT
■LCD (ED1) short check
Procedure Note
In the STANDBY source, press [ATT] key
All lights are off →Turns on odd and even terminals alternatively every
125ms (terminals that have a maximum number of grids) →Turns on only
the odd terminals →Turn on only the even terminals →
■
Clearing CD mechanism information / Service information / DC offset error information (Clearing E2PROM data)
Status Display Description
While pressing and holding [2] key
and [5] key, reset-start.
CD O At normal termination
CD – At abnormal termination
This mode is cancelled by resetting. (The last screen will not be retained.)
Data to be cleared is shown below.
CD mechanism information
I2C communication status display
CD mechanism error log display
Displays CD loading error data
Displays CD EJECT error data
Displays CD time code count error data (missing count)
Displays CD time code count error data (count not updated)
Service Information
Power ON time display
CD operation time display
CD EJECT times display
PANEL open/close times display
Forced Power OFF information display
DC offset error information
DC offset error 1 display (Provides information on whether there is an improper connection or another error)
DC offset error 2 display (Provides information on the number of capacitor leaks)
■Clearing DC offset error detection data (E2PROM data clearing)
Procedure Note
While pressing and holding [3] key and [6] key, reset-start. Entering DC offset error display mode.
Procedure Display Description
Press and hold the [3] and
[6] keys, and reset-start
dC ER When DC offset error is detected (when either one of capacitors is
leaking, or an improper connection or another error is detected)
dC OK When DC offset error is not detected (when none of capacitors leak,
no improper connection or other error is detected)
1
dC1 ER When improper connection or other DC offset errors are detected.
dC1 OK When improper connection or other DC offset errors are not detected.
TEST MODE (7-SEG LCD)

13
X34-56xx-xx
Procedure Display Description
■1dC1 OK When detecting improper connection or other DC offset errors, clears
detection data. (Clear E2PROM)
2dC2 4 When detecting capacitor leak, provides information on the number
of capacitor leaks. (0~4)
■2dC2 0 When detecting capacitor leak, clears the number of capacitor leaks.
(Clear E2PROM)
This mode is cancelled by resetting. (The last screen will not be retained.)
■FM/AM channel space switching (except model for European market)
Procedure Note
While Power OFF, press and hold [1] key and [5] key, and press
[SRC] key to Power ON
FM200kHz/AM10kHz ↔FM50kHz/AM9kHz (Except KDC-138CR)
FM50kHz/AM10kHz ↔FM200kHz/AM10kHz (KDC-138CR)
■ROM data transfer
When replacing front-end (A1), this function is used to transfer E2PROM data (ROM correction, security and other data) to front-end (A1) to
E2PROM of to mother unit (X34-), used for saving data, and, after completing replacement of front-end (A1), to recover data from the E2PROM
of the mother unit (X34-), and for saving data to the new front-end (A1). Refer to “ROM data transfer processes” on the next page for details on
front-end (A1) replacement procedures and on the data to be transferred.
Procedure Display Description
While pressing and holding [1]
key and [3] keys, reset-start :All lights ON.
Press [B.BOOST] key (MENU) READ MENU mode
Press [ ] key or [ ] key
READ Front-end (A1) →Mother unit (X34-). Data transfer processing.
WR T Mother unit (X34-) →Front-end (A1). Data transfer processing.
(In the above ROM READ
status), ■[] key for
2 seconds or longer
R– Front-end (A1) →Mother unit (X34-). ROM data is being transferred.
R–OK Front-end (A1) →Mother unit (X34-).
ROM correction transfer, security and other data is OK.
R–02 Front-end (A1) →Mother unit (X34-).
Transfer of security and other data is OK.
R–ER Front-end (A1) →Mother unit (X34-). ROM data transfer is NG.
(In the above ROM WRT
status), ■[] key for
2 seconds or longer
W– Mother unit (X34-) →Front -end (A1). ROM data is being transferred.
W–OK Mother unit (X34-) →Front-end (A1).
ROM correction, security and other data transfer is OK.
W– 0 1 Mother unit (X34-) →Front-end (A1).
ROM correction data transfer is OK.
W– 0 2 Mother unit (X34-) →Front-end (A1).
Transfer of security and other data is OK.
W– ER Mother unit (X34-) →Front-end (A1). ROM data transfer is NG
(In every status of ROM data
[B.BOOST] transfer processing)
:Clear from ROM correction data transfer processing
TEST MODE (7-SEG LCD)

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■Example
::.
Key Description of display Description
5
Disc EJECT times display
EJCXXXXX Disc EJECT times display. MAX 65535 (times)
■5While disc EJECT times is displayed, press and hold for 2
seconds or longer to clear disc EJECT times.
A symbol “■” in the key column indicates that the key should be pressed and held for 1 second or longer.
■How to enter the test mode
Procedure Note
Press and hold the [1] key and [3] key and reset. While “– – – –” is displayed, power can be turned ON for only 30 minutes.
(KDC-MP238/MP439 only)
All lamps blink when it is detected that the sub-clock resonator is disconnected.
Do not display “CODE_OFF”, “CODE_ON” or “CODE_NG” when Power is ON.
When having started up in the test mode, change the LINE MUTE inhibition time from 10 seconds to 1 second.
When operating in the test mode, even if a DC offset error occurs, detection information is not written in the E2PROM.
When operating in the test mode, CD mechanism error log information clear mode, and DC offset error detection information clear mode, do
not perform DEMO mode operations.
Also, do not display DEMO ON/OFF option items in the MENU in STANDBY source in the above modes.
Forced disc ejection is prohibited in the test mode.
■How to clear the test mode
Procedure Note
Reset, momentary power down, ACC OFF, Power OFF, Panel detached. Clearing the test mode
■Test mode default condition
Description Default values
Source STANDBY
Display Display lights are all turned on.
Volume -10dB (“30” is displayed.)
Bass Boost OFF
CRSC OFF regardless of having/not having the switching function.
AUX ON
System Q NATURAL (FLAT)
Preout Rear
TEST MODE (14-SEG VFD)

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■Special displays when all lights are on in STANDBY source
Key Description of display Description
Common All lights ON. All lights ON.
1
Destination terminal
condition indication TYPE:11 “TYPE” indicates system μ-com (IC1) destination, and shows real-time condition of the destination terminal.
Development ID condition
indication 804A2–5.00 Development ID – Version (system μ-com: IC1)
2 Serial No. display 00000000 Serial No. is displayed (8 digits)
3
Power ON time display
PON 0HXX 00~50 is displayed for “XX”. When less than 1 hour, displayed
by increments of 10 minutes.
PONXXXXX 00001~10922 is displayed for “XXXXX”. MAX 10922 (hours)
■3When Power ON time is displayed, press and hold for
2 seconds or longer to clear Power ON time.
4
Disc operation time display
CDT 0HX X 00~50 is displayed for “XX”. When less than 1 hour,
displayed by increments of 10 minutes.
CDTXXXXX 00001~10922 is displayed for “XXXXX”. MAX 10922 (hours)
■4
While the disc operation time is displayed, press and hold for
2 seconds or longer to clear the disc operation time.
(Cleared only for displayed media.)
5
Disc EJECT times display
EJCXXXXX Disc EJECT times display. MAX 65535 (times)
■5While disc EJECT times is displayed, press and hold for
2 seconds or longer to clear disc EJECT times.
6
Panel open/close times
display
PC XXXXX PANEL open/close times display. MAX 65535 (times)
■6
Press the key for more than 2 seconds while the PANEL open/
close count is displayed and PANEL open/close count is cleared.
FM ROM correction version
display
RO123 The number is the ROM correction version number.
ERR When E2PROM is not installed.
R–––– When not written in yet.
R∗∗∗∗ When data not matched. (due to the difference in versions)
Audio data initialization AUD I N I T AUDIO setting value is re-set to the test mode default value.
Forced Power OFF
information display
POFF ––– No forced power OFF
POF F SEC Forced power OFF because of missing Security Code.
(Code security supporting model)
POF F PNL Forced power OFF by communication error between system
μ-com and panel.
■ While the forced power OFF data is displayed, press and
hold for 2 seconds to clear the data.
CD information display
mode ON/OFF
For the display contents, refer to “CD information display
mode” in the next section.
■ While in CD information display mode, press and hold for
2 seconds or longer to clear all CD information.
TEST MODE (14-SEG VFD)

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• CD information display mode
Key Description of display Description
FM
(forward
rotation)
AM
(reverse
rotation)
/ CD mecha-
nism error
log display
MC E R R 1:X X Mechanism error log 1 (Latest)
XX: Error number. “– –” is displayed in case there is no error.
MC E R R 2:X X Mechanism error log 2 (Latest)
XX: Error number. “– –” is displayed in case there is no error.
MC E R R 3:X X Mechanism error log 3 (Latest)
XX: Error number. “– –” is displayed in case there is no error.
/
CD Load
error
information
display
LDERR1:XX Load error switch 1
XX: Number of errors. “– –” is displayed in case there is no error.
LDERR2:XX Load error switch 2
XX: Number of errors. “– –” is displayed in case there is no error.
/
CD Ejection
error
information
display
EJERR1:XX Ejection error switch 1
XX: Number of errors. “– –” is displayed in case there is no error.
EJERR2:XX Ejection error switch 2
XX: Number of errors. “– –” is displayed in case there is no error.
EJERR3:XX Ejection error switch 3
XX: Number of errors. “– –” is displayed in case there is no error.
EJERR4:XX Ejection error switch 4
XX: Number of errors. “– –” is displayed in case there is no error.
/
CD time
code error
count data
display
(Missing
counts)
CNT LOS E CD time code error count data (Missing counts) mode display.
CDDA :X X Number of CD-DA count errors
XX: Number of errors. “– –” is displayed in case there is no error.
CDROM :X X CD-ROM (Compressed file) number of count errors
XX: Number of errors. “– –” is displayed in case there is no error.
/
CD time
code error
count data
display
(count not
updated)
CNT STAY CD time code error count data (count not updated) mode display.
CDDA :X X Number of CD-DA count errors
XX: Number of errors. “– –” is displayed in case there is no error.
CDROM :X X CD-ROM (Compressed file) Number of count errors
XX: Number of errors. “– –” is displayed in case there is no error.
■Test mode specifications in TUNER source
Error is found in front-end (A1), etc. if indications below is displayed while in tuner source.
Status Display Description
Front-end (A1) E2PROM data error TNE2P NG Front-end (A1) E2PROM is still the default (unspecified) value.
Front-end (A1) communication error T NCON NG Communication with front-end (A1) is not possible.
Destination mismatch TNTYP NG When destination is mismatch between front-end (A1)
E2PROM and the product.
• TUNER preset operation
Key Description of display Description
4 Preset function FM1 9 8.3 A 4 Change to 98.3MHz with the preset key [4].
TEST MODE (14-SEG VFD)

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• K3I forced switching
Every time when [6] key is pressed in tuner FM source, switched in the following order: AUTO →Forced WIDE →Forced MIDDLE →Forced
NARROW →AUTO. Default status is AUTO, and displayed as shown below.
Key Description of display Description
6 K3I Forced switching
FM1 9 8.1 A AUTO
FM1 9 8.1W Forced WIDE
FM1 9 8.1M Forced MIDDLE
FM1 9 8.1N Forced NARROW
• RDS auto measurement (Only for model with RDS)
Add the process to replace the visual inspection of PS display previously done in the production line.
Status Display Description
PS data reception RDS T EST If displayed as shown at the left, force to OFF.
P-CON is recovered by Power OFF/ON.
• FST adjustment mode
Perform FST soft-mute adjustment.
Key Note
■ Enter the FST adjustment mode. (Press for 1 second or longer.)
Operations in the FST adjustment mode are as follows:
Key Description of display Description
FM
(UP)
AM
(DOWN)
/ Soft-mute adjustment SMD – F 0 ↔7
Seek Stop Level
adjustment (Auto) ATN V 0.00 (V) ↔5.00 (V). Normal (Local OFF)
Seek Stop Level
adjustment (Auto) ATL V 0.00 (V) ↔5.00 (V). Normal (Local ON)
/ Seek Stop Level
adjustment (Manual) MNN V 0.00 (V) ↔5.00 (V). Normal (Local OFF)
/ Seek Stop Level
adjustment (Manual) MN L V 0.00 (V) ↔5.00 (V). Normal (Local ON)
■ Adjustment value
memory EP WR I TE Displays the data that has been written in the E2PROM when pressing the key for 2 seconds or longer.
Mode clear FM1 9 8.3 A 4 Clear the FST adjustment mode. (Returns to normal
display and the test mode is retained.)
Switch Local Seek ON or OFF by briefly pressing [AUTO]/[TI] key when the Local Seek ON/OFF switching is allowed in the band.
After completing the FST adjustment, if you wish to clear the test mode, you can do this using the reset button.
TEST MODE (14-SEG VFD)

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■Test mode specifications in CD source
Display mode default: P-Time
• Procedure in CD-DA media (KTD-02A)
Key Description of display Description
Track up procedure
Every time pressed, jumps to the track shown below.
No.9 →No.15 →No.10 → No.11 →No.12 →No.13 →
No.22 → No.14 →No.9 (recursive)
But in case the disc has 8 tracks or less, playback starts with
track No.1. (For both CD-DA and compressed file discs)
Track down procedure Goes down by 1 track from the currently played track.
1 Jump procedure
Jump to No. 28 (Scratch 0.7mm for MUSIC line vibration testing)
2 Jump procedure Jump to No. 14 (Blurring surface disc TCD-731RA Tr14)
3
Information display
Mechanism model name
Mechanism version
6E00:
Display of Mechanism model name and Mechanism version.
(When key is pressed while the display in the left is being
shown, returns to normal display.)
6 Jump procedure Jump to No. 15. Set the volume value to “25”.
(For 20Hz 0dB DC protection false-operation FCT checking)
• Procedure in CD-DA media (MP3/WMA)
Key Description of display Description
File type display (MP3) MP 3
Display file format just before the start of file play back.
File type display (WMA) WM A
■Audio-related test mode
Procedure Note
Press the [AUD] key (main unit)
Press the [AUD] and [∗] keys (Remote control)
Enter audio adjustment mode (the initial item should be Fader, and then, Balance →
Bass Level →Middle Level →Treble Level →SW Level →System Q →V-Offset →
LPF Sub Woofer.
About audio adjustment items (include both Audio Function Mode and Audio Setup Mode)
Procedure Item Procedure Description
For item
forwarding
procedure,
press [AUD]
key and
[FM] key
Fader [VOL] knob and [ / ] key Adjust to 3 steps of R15 ↔0 ↔F15. (Default value: 0)
Balance [VOL] knob and [ / ] key Adjust to 3 steps of L15 ↔0 ↔R15. (Default value: 0)
Bass Level [VOL] knob and [ / ] key Adjust to 3 steps of -8 ↔0 ↔+8. (Default value 0)
Middle Level [VOL] knob and [ / ] key Adjust to 3 steps of -8 ↔ 0 ↔+8. (Default value 0)
Treble Level [VOL] knob and [ / ] key Adjust to 3 steps of -8 ↔0 ↔+8. (Default value 0)
LPF Sub woofer [VOL] knob and [ / ] key Adjust to 2 steps of 80Hz ↔Through. (Default value: Through)
(Only in models with Sub Woofer output)
Volume Offset [VOL] knob and [ / ] key Adjust to 3 steps of -8 ↔0 ↔+8. (Default value 0)
Procedure Note
Press the [B.BOOST] key for 1 second or longer Switch Bass Boost (Note: Front key functions as MENU.)
TEST MODE (14-SEG VFD)

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■[ATT] key operation
Procedure Note
In the TUNER source, press [ ] key ATT OFF/ON
■MENU-related test mode
Procedure Note
Press the [B.BOOST] key (main unit)
Press the [DNPP/SBF] and [DIRECT] keys (Remote control) Continuous forwarding by remote control is prohibited
■Backup current measurement
Procedure Note
While ACC OFF (Back Up ON), Reset MUTE terminal is OFF after 2 seconds, not after 15 seconds.
(During this time, the CD mechanism does not function.)
■PREOUT switching
Procedure Note
In the STANDBY source, press and hold [AUTO] key for
1 second or longer Switches PREOUT
■Fluorescent indicator (ED1) short check
Procedure Note
In the STANDBY source, press [ATT] key
All lights are off →Turns on odd and even terminals alternatively every 125ms
(terminals that have a maximum number of grids) →Turns on only the odd
terminals →Turn on only the even terminals →
■
Clearing CD mechanism information / Service information / DC offset error information (Clearing E2PROM data)
Status Display Description
While pressing and holding [2] key and
[5] key, reset-start.
CD O At normal termination
CD X At abnormal termination
While “– – – –” is displayed, power can be ON for 30 minutes. This mode is cancelled by resetting. (The last screen will not be retained.)
Data to be cleared is shown below.
CD mechanism information
CD mechanism error log display
Displays CD loading error data
Displays CD EJECT error data
Displays CD time code count error data (missing count)
Displays CD time code count error data (count not updated)
Service Information
Power ON time display
CD operation time display
CD EJECT times display
PANEL open/close times display
Forced Power OFF information display
DC offset error information
DC offset error 1 display (Provides information on whether there is an improper connection or another error)
DC offset error 2 display (Provides information on the number of capacitor leaks)
TEST MODE (14-SEG VFD)

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■Clearing DC offset error detection data (E2PROM data clearing)
Procedure Note
While pressing and holding [3] key and [6] key, reset-start. Entering DC offset error display mode.
Procedure Display Description
Press and hold the [3] and
[6] keys, and reset-start
DC ERR When DC offset error is detected (when either one of capacitors is
leaking, or an improper connection or another error is detected)
DC OK When DC offset error is not detected (when none of capacitors leak,
no improper connection or other error is detected)
1
DC1 ERR When improper connection or other DC offset errors are detected.
DC1 OK When improper connection or other DC offset errors are not detected.
■1DC1 OK When detecting improper connection or other DC offset errors, clears
detection data. (Clear E2PROM)
2DC2 4 When detecting capacitor leak, provides information on the number
of capacitor leaks. (0~4)
■2DC2 0 When detecting capacitor leak, clears the number of capacitor leaks.
(Clear E2PROM)
This mode is cancelled by resetting. (The last screen will not be retained.)
■FM/AM channel space switching (Except model for European market)
Procedure Note
While Power OFF, press and hold [1] key and [5] key,
and press [SRC] key to Power ON
FM200kHz/AM10kHz ↔FM50kHz/AM9kHz (Except KDC-MP238CR)
FM50kHz/AM10kHz ↔FM200kHz/AM10kHz (KDC-MP238CR only)
■Security (KDC-MP238/MP439 only)
• Forced Power ON mode
Procedure Note
While pressing and holding [B.BOOST] key and [4] key, reset-start. While “– – – –” is displayed, power can be turned ON for only 30
minutes. After 30 minutes, can only be recovered by resetting.
• Method of clearing the programmable security code (KDC MP238 only)
Procedure Display Description
Press [ ] key for 3 seconds or longer-
while pressing [AUTO] key CODE:– – – – Carry out the procedure while “– – – –” is being displayed.
CODE
:“– – – –” disappears.
Press the remote control [5] key 2 times,
display “K”, and press [ ] key. CODE:K
Press the remote control [2] key 3 times,
display “C”, and press [ ] key. CODE:KC
Press the remote control [2] key 1 time,
display “A”, and press [ ] key. CODE:KCA
Press the remote control [7] key 2 times,
display “R”, and press [ ] key. CODE:KCAR
APPROVED Security cancelled. (If wrong character is input, code
request mode is displayed.)
TEST MODE (14-SEG VFD)