Kenwood KDC-138/138CR User manual

This product uses Lead Free solder.
This product complies with the RoHS directive for the European market.
© 2007-9 PRINTED IN JAPAN
B53-0577-00 (N)373
SERVICE MANUAL
KDC-138/138CR
KDC-139/139S
CD RECEIVER
* Depends on the model. Refer to the parts list.
Panel assy
KDC-138 (A64-4276-02)
Panel assy
KDC-138CR (A64-4277-02)
TDF SPARE-PANEL
MAIN UNIT NAME TDF PARTS No. TDF NAME
KDC-138 Y33-2830-63 TDF-81D
KDC-138CR Y33-2830-64 TDF-81DCR
KDC-139 Y33-2820-65 TDF-139
Panel assy
KDC-139 (A64-4286-02)
KDC-139S (A64-4287-02)
* Carrying case
(W01-1692-05)
Mounting hardware assy
(J21-9716-03)
Lever
(D10-4589-04) x2
DC cord
(E30-6415-15)
Screw set
(N99-1757-05)
* Escutcheon
(B07-xxxx-xx)
* Plastic cabinet assy
(A02-2736-03)
Screw (4x16)
(N84-4016-48)
KDC-138 KDC-138CR
KDC-139
KDC-139S Y33-2820-66 TDF-139S

2
KDC-138/138CR/139/139S
BLOCK DIAGRAM
ELECTRIC UNIT (X34- )
SWITCH UNIT (X16- )
E-VOL
IC2 or IC3
A8V
SYSTEM u-COM
BU
POWER
DC-DET
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
RESET ENCODER
ROTARY
REMOTE
ILLUMI
KEY
MATRIX
KEY
LED
IC1
SW5
IC6
IC2
J1
AM+B
S1
ED1
J5
MUTE
Q705
J2
A1
SERVO+B
A8V
BU5
Q301
BU5
BU5
Q901-903
DME1
BU5
SW5
CD
SERVO
IC
to GND
S2
J1
SW5
AM+B
A8V
TUNER
FRONT-END
ANT.
E2PROMSW5
BU
MECHA
CD
PRE-OUT
MUTE
BU5
SW5
F-AUX
J2
PANEL DET
IC1
DRIVER
BU5
SW5
FL+B
IC4
POWER
SUPPLY
IC
J3
BU5
LCD
IC10
2
16
1
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
10
BU DET
11
2
MUTE
12
3
3
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
DPU1
CD PLAYER UNIT (X32-598x-xx)
BOARD (X34- )
MOTHER
EF
A
C
B
TR COIL
FO COIL
APC
IC1
16.93MHz
CLOCK
IC6
8V SW
3.3V REG
IC3
LOADING &
RF AMP
SERVO
PROCESSOR
MOTOR
DRIVER
MOTOR
SPINDLE
3.3V REG
IC2
S2
S4
S1
S3
+
+
ONLY
SLED
MOTOR
DM1
DM2
Q1
X2
Q7
PROCESSOR
MICRO
1 CHIP IC
LEVEL SHIFT
LEVEL SHIFT
LEVEL SHIFT
Q3
Q3
Q4
(0-00),(0-01) ONLY
SW
Q2
SW
Q8,9
3.3V SW
Q6
SW (0-01),(0-03)
ONLY
(0-00),(0-01)
X1 or
VREF
D.GND
BU5V
8EJE-SW
12EJE-SW
LOS-SW
LOE/LIM-SW
D.GND
MOTOR
LO/EJ
S.GND
D.GND
D.GND
S.GND
A.GND
AS8V
R-ch
L-ch
S.GND
DMUTE
A,B,C,E,F
VREF
TR OUT
FO OUT
DM OUT
FM OUT
TVD,SPL
FOD,TRD,
DATA
CLK
MSTOP
RST
MUTE
MUTE
CLK
DATA
MSTOP
MRST
D.GND
S7V
AVDD
REGVDD
P-ON1
IOVDD

3
KDC-138/138CR/139/139S
COMPONENTS DESCRIPTION
●ELECTRIC UNIT (X34-564x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 System µ-COM Controls FM/AM tuner, the changer, CD mechanism, panel, volume and tone.
IC2,3 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 or 45W maximum.
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.
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.
Q402 Quick Charge Voltage SW Charges voltage quickly when the base goes Hi.
Q701,702 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.
Q901 DC Offset DET ON when the base goes Hi after Q902’s and Q903’s outputs are separated.
Q902,903 DC Offset DET SW ON when the bases go Lo after IC6’s SP-OUTs (DC) are separated.
●SWITCH UNIT (X16-616x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 LCD Driver
IC2 Remote Control Sensor
●CD PLAYER UNIT (X32-5980-04)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1
CD Signal Processor
& MECHA µ-COM
RF Amplifier responding
to CD-RW
Focusing, tracking, sled and spindle servo processing.
Automatic adjustment (focusing, tracking, gain, offset and balance) operations.
Digital signal processing (DSP, PLL, sub-codes, CIRC error correction, audio data
interpolation processing) operations, and microcomputer function.
Generation of RF signal based on the signals from the APC circuit and the laser pick-up,
and generation of servo error (focusing error and tracking error) signals.
Detection of dropout, anti-shock, track crossing and off-tracking conditions, included gain
control function during CD-RW.
IC2 3.3V REG Supplies 3.3V to IC1 and the laser pick-up.
IC6 4ch BTL Driver Focusing and tracking coil, sled and spindle motor driver, disc loading and eject operation.

4
KDC-138/138CR/139/139S
Ref. No. Application / Function Operation / Condition / Compatibility
Q3 5V-3.3V Level Shift Shifts 5V to 3.3V, or 3.3V to 5V.
Q4 5V-3.3V Level Shift Shifts 3.3V to 5V.
Q6 BU3.3V SW Q6 is ON when Q8 or Q9 is ON.
Q7 APC (Auto Power Control) Drives LD (Laser Diode).
Q8 Power Supply Control Power Supply Control from MECHA µ-COM. Q6 is ON when pin 63 (P_ON1) of IC1 is Hi.
Q9 Power Supply Control Power Supply Control from system µ-COM. Q6 is ON when pin 125 (MSTOP) of IC1 is Hi.
D1,2 5V Force Voltage Prevention 5V Force Voltage Prevention from MECHA µ-COM side.
D3 Laser Diode Protection Prevents reverse bias which is applied to laser. Laser destruction prevention.
D4 Static Electricity Countermeasure Prevents malfunction by static electricity.
COMPONENTS DESCRIPTION

5
KDC-138/138CR/139/139S
MICROCOMPUTER’S TERMINAL DESCRIPTION
●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 PANEL 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 - Not used Output L fixed
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 LCD data output
32
VFD PAN DATA I LCD data input
33 VFD CLK O LCD clock output 125kHz
34 VFD BLK - Not used Output L fixed
35 CD DATA I/O CD mechanism I2C data input/output
36 CD CLK I/O CD mechanism I2C clock output
37 NC - Not used Output L fixed
38 CD LOS SW I CD loading detection
39 PIO0 I
Communication request from mechanism DSP H: Data request
40 CD MSTOP O CD mechanism µ-com stop H: Mechanism µ-com operates,
L: Mechanism µ-com stops
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
43 PON CD - Not used

6
KDC-138/138CR/139/139S
Pin No. Pin Name I/O Application
Truth Value
Table Processing Operation Description
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 LCD control request
47
CD DRIVEMUTE O Motor driver mute output
48 CD CCE O CD mechanism chip enable
49 NC I 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
PON EXT GND I/O IC2 external input quick charge control
L: OFF, Hi-Z: Quick charge, When IC2 is in source select:
Hi-Z, Mute L: L, Momentary power down/Power OFF: L
68 MUTE I/O Mute L: Mute OFF, Hi-Z: Mute ON
69
ANALOG CON O AUX/LX audio switching AUX: H (Switches after 100ms after first-out mute
begins to work), LX/Other source: L
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 - Not used Output L fixed
84 TUN SMETER I S-meter input
85 TYPE1 I Destination switching eRefer to the truth value table
MICROCOMPUTER’S TERMINAL DESCRIPTION

7
KDC-138/138CR/139/139S
Pin No. Pin Name I/O Application
Truth Value
Table Processing Operation Description
86 TYPE2 I Destination switching eRefer to the truth value table
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 OFFSET DET I Power IC offset detection
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)
MICROCOMPUTER’S TERMINAL DESCRIPTION
• Truth value table
qCD motor control
CD motor CD loading/eject
Stop L L
Load H L
Eject H H
Brake H Hi-z
eDestination switching
TYPE 2
(Pin 86)
TYPE 1
(Pin 85) Model
0V 0V KDC-135
0V 2.4V KDC-135CR
1.2V 0V KDC-136
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

8
KDC-138/138CR/139/139S
■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

9
KDC-138/138CR/139/139S
■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 5:00701K 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.
Po nXXXXX 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
PLy 0HXX 00~50 is displayed for “XX”. When less than 1 hour,
displayed by increments of 10 minutes.
PL yXXXXX 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)
■AM ROM data transfer
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 Pn 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

10
KDC-138/138CR/139/139S
• 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.
:XXCDDA 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.
:XXCDDA 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.
TEST MODE

11
KDC-138/138CR/139/139S
• TUNER preset operation
Key Description of display Description
4 Preset function 98.3 Change to 98.3MHz with the preset key [4].
• 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 18dBµ (0) ↔36dBµ (F)
■ 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 98.3 Clear the FST adjustment mode. (Returns to normal display
and the test mode is retained.)
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)
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)
Used media: For CD, KTD-02A
TEST MODE

12
KDC-138/138CR/139/139S
■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.)
■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
TEST MODE

13
KDC-138/138CR/139/139S
■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.
■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.)
TEST MODE

14
KDC-138/138CR/139/139S
■FM/AM channel space switching
Procedure Note
While Power OFF, press and hold [1] key and [5] key, and press [SRC] key to Power ON FM200kHz/AM10kHz ↔FM50kHz/AM9kHz
■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–01 Mother unit (X34-) →Front-end (A1).
ROM correction data transfer is OK.
W–02 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
[] transfer processing) :Clear from ROM correction data transfer processing
TEST MODE

15
KDC-138/138CR/139/139S
When replacing front-end (A1) of mother unit (X34-), or when
adding or replacing ROM correction (program correction with
ROM IC (IC10)), the following activities are required.
■Overview
When replacing front-end (A1) in the model where ROM
correction and security data have been written into
E2PROM, included in the front-end (A1) pack, the transfer
function of the E2PROM data itself in the replaced front-end
(A1) is required.
This function in the above system configuration is used
to allow for complete replacement of the front-end at any
service center.
■Overview of specifications
Procedures for replacement are as follows: To install the
E2PROM to the mother unit (X34-), and replace front-
end (A1) with new front-end after copying the data in the
E2PROM (such as ROM correction data and other data) in
the front-end (A1) to the mother unit (X34-) by operating the
system, and then copy the data (such as ROM correction
data and other data) into the mother unit to the E2PROM of
the front-end (A1), operating the main body.
Tuner adjustment data was inserted during the tuner pack
manufacturing, and data will not be transferred because
front-end (A1) is built-in.
In addition, tuner adjustment data for new front-end (A1) is
supplied as a service part in which data was inserted.
■Data to be copied
• ROM correction data
• Other data
Security data
DEMO MODE ON/OFF status
POWER ON time (For maintenance)
Playback time (For maintenance)
EJECT count (For maintenance)
Panel open/close count (For maintenance)
CD I2C status (For maintenance)
CD offset error code (For maintenance)
CD sound skips count (For maintenance)
CD time code not updated count (For maintenance)
CD load switch errors count (For maintenance)
CD ejection errors count (For maintenance)
DC offset error (For maintenance)
Forced Power OFF information (For maintenance)
Serial number (For maintenance)
E2PROM data check data (For internal check)
■Operation procedure
Operation procedure is different depending on the conditions.
Proceed with the appropriate operation procedure depending
on the specific condition.
1. In case of replacing front-end (A1) without an applicable
ROM correction.
2. In case of replacing front-end (A1) with an applicable
ROM correction.
3. In case of applying new ROM correction at the same time
when front-end (A1) is replaced. (No ROM correction has
been carried out.)
FRONT-
END (A1)
E2PROM E2PROM
Mother unit (X34-)
E2PROM circuit pattern
q
Install new E2PROM.
Install E2PROM containing no data, in case of [1] and [2].
In case of [3], install maintenance E2PROM with an applicable
ROM correction program.
FRONT-
END (A1)
E2PROM E2PROM
Mother unit (X34-)
w
ROM DATA TRANSFER PROCESSES

16
KDC-138/138CR/139/139S
Turn power on.
Press and hold the [1] and [3] keys and press reset button.
(Enter the system in the test mode.)
Press [B.BOOST] key. (ROM data System enters data
transfer mode.)
Press [ ] (or [ ].) (Select READ)
Press [ ] key for 1 second or longer. (Data transfer)
FRONT-
END (A1)
E2PROM E2PROM
Mother unit (X34-)
e
READ OK
In case of [2]
In case of [1] or [3]
R-OK
READ OK2 R-O2
Press [ ] key. (Exit ROM data transfer mode.)
Turn power off.
Remove front-end (A1).
FRONT-
END (A1)
E2PROM
Mother unit (X34-)
r
Install new front-end (A1).
No ROM correction or other data status.
FRONT-
END (A1)
E2PROM E2PROM
Mother unit (X34-)
t
Turn power on.
Press and hold the [1] and [3] keys and press reset button.
(Enter the system in the test mode.)
Press [B.BOOST] key. (Start transferring ROM data.)
Press [ ] (or [ ].) (Select WRT)
Press [ ] key for 1 second or longer. (Data transfer)
FRONT-
END (A1)
E2PROM E2PROM
Mother unit (X34-)
y
WRT OK
In case of [2] or [3]
In case of [1]
W-OK
WRT OK2 W-O2
Press [ ] key. (Exit ROM data transfer mode.)
ROM DATA TRANSFER PROCESSES

17
KDC-138/138CR/139/139S
4. In case of applying a new ROM correction when front-end
(A1) is replaced (There is ROM correction data.)
5. In case of applying a new ROM correction even when
front-end (A1) is not replaced.
FRONT-
END (A1)
E2PROM
Mother unit (X34-)
E2PROM circuit pattern
q
ROM correction
Tuner adjustment
Other
Install new E2PROM. (E2PROM that has been updated with
ROM correction)
FRONT-
END (A1)
E2PROM E2PROM
Mother unit (X34-)
w
Turn power on.
Press and hold the [1] and [3] keys, press reset button. (Enter
the system in the test mode.)
Press [B.BOOST] key. (ROM data System enters data
transfer mode.)
Press [ ] (or [ ].) (Select WRT)
Press [ ] key for 1 second or longer. (Data transfer)
FRONT-
END (A1)
E2PROM E2PROM
Mother unit (X34-)
e
WRT OK1 W-O1
In case of [4] In case of [5]
Press [ ] key. (Exit ROM
data transfer mode.)
Press [ ] (or [ ].) (Select READ)
Press [ ] key for 1 second or longer. (Data transfer)
FRONT-
END (A1)
E2PROM E2PROM
Mother unit (X34-)
READ OK R-OK
ROM DATA TRANSFER PROCESSES

18
KDC-138/138CR/139/139S
Press [ ] key. (Exit ROM data transfer mode.)
Turn power off.
Remove front-end (A1).
FRONT-
END (A1)
E2PROM
Mother unit (X34-)
r
Install new front-end (A1).
No ROM correction or other data status.
FRONT-
END (A1)
E2PROM E2PROM
Mother unit (X34-)
t
Turn power on.
Press and hold the [1] and [3] keys press reset button. (Enter
the system in the test mode.)
Press [B.BOOST] key. (Enter the system in ROM data
transfer mode.)
Press [ ] (or [ ].) (Select WRT)
Press [ ] key for 1 second or longer. (Data transfer)
FRONT-
END (A1)
E2PROM E2PROM
Mother unit (X34-)
y
WRT OK W-OK
Press [ ] key. (Exit ROM data transfer mode.)
ROM DATA TRANSFER PROCESSES

19
KDC-138/138CR/139/139S
EDCBA
1
2
3
4
5
6
7
1 40
43
SRC
VOL AUD
RST 23456AUTO MENU
AM-
AUX IN
FM+
1
KS2
KI1
KI5
KI3
KS3
KI4
KS4
KI2
KS6
21
D2
D5
D7
ED1
J2
D9 D12
D15
D18
D21
S3
S2 S4 S7 S8 S9 S12 S13 S14 S15 S10 S11
S17
S18
S19
S20
S16
S5
D22
D1
D3
S1
D4
D6
D8
D10
D11
D13
D14
D16
D17
D19
D20
D23
IC2
SWITCH UNIT
X16-616x-xx (J76-0454-02)
R2
C5
R12
R30
C4
C3
C2
R3
CP1
C1
C11
C12
R1
C6
C7
CP2
R4
R5
R6
R7
R8
R9
R10
R11
R21
R24
R25
R26
R27
R28
R29
119
202
16
17
32
33
48
49
64 1
AUX-GND
AUX-L
AUX-R
KS6
KI3
KI5
KI2
KS2
KI1
KI4
D-GND
KS4
KS3
PAN5
ESD-GND
RST
DET
SW5V
GURD
LED+B
R-CCW
R-CW
REMO
DATA L
CE
CLK
DATA S
J1
D38
D31
D32
D33
D34
D35
D36
D37
IC1
SWITCH UNIT
X16-616x-xx (J76-0454-02)
Refer to the sche-
matic diagram for
the values of resis-
tors and capacitors.
PC BOARD
(COMPONENT SIDE VIEW) (FOIL SIDE VIEW)
Refer to the sche-
matic diagram for
the values of resis-
tors and capacitors.
X16-616x-xx
Ref. No. Address
IC1 5D
X16-616x-xx
Ref. No. Address
IC2 2B

20
KDC-138/138CR/139/139S
FGHIJ
1
2
3
4
5
6
7
ELECTRIC UNIT X34-564x-xx
(J76-0457-02)
A-CLK
A-DATA
SEL2
SEL1
W11
W304
W59
112
W54
W14
C5
L401
W802
W109
W18
C7
W106
W55
R109
W30
W20
W301
W201
C2
C15
C401
W803
W110
C805
W36
W48
W47
W26
W27
W28
W104
R101
R102
R106
W21
R116
R219
W305
R208
W
W46
C301
C302
W66
C901
C902
W34
C1
W112/
W42
W43
L1
R1
W15
R2
R11/W5
R3
R15
R103
R107
R112
R209
R210
W105
W51
W309
W308
R330
R332
R333
R334
R336
R
R
R
R
R609
R611
R908
R910
R911
R907
R914
R913
R909
R912
W901
W902
X1
X2
W23
W810
W811
W809
W903
W6
W4
W2
W7
W8
W10
W9
W13
W12
W17
W19
R5
R4
W16
W805
W806
W807 W100
W808
W44
W306
W812
W1
W3
W64
W63
W24
W22
W303
W302
R302
R304
W85
W49
W86
W57
W58
W307
R402
R403
W801
W62
W25
W60
W29
R117
W61
W37
W40
W41
R220
W32
W33
W35
W31
W56
W53
W102
W65
R331
R202
R205
R206
R218
R225
R227
R318
R956
C11
C9
R105
R306
R317
R340
R406
R598
TH1
C811
C3
C4
C12
C14
C101
C102
C202
C203
C204
C205
C809
C812
C807
C813
C814
C820
R17
R104
R108
R111
R113
R115
R201
R203
R321
R226
R228
R229
R320
R315
R409
R803
R806
R808
R952
R3
4
1
2
C816
C815
C818
C819
R12
R13
R14
R16
R110
R114
R971
R204
R223
R301
R957
R303
R316
R305
R307
R313
R310
R314
R312
C817
R408
R599
R801
R802
R804
R805
R901
R902
R903
R904
R905
R906
R915
R322
R961
R891
R311
R207
R962
R335
R960
R342
R319
R793
R407
BEE
CC
EB
1
3
1
1
4
12
100
81 80
30
51
123
224
50
31
20
28
BE
BE BE
BE
BE
BE
BE
BE
BE
BE
BE
BE
BE BE
BE
B
25 1
24
916
81 2
E
BE
BE
J3
D801
D1
D103
J1
D4
D109
D401
D404
D802
D803
Q2
D2
D7
D105 D901
Q8
D108
D107
D106
D606
CN2
D3
Q301
Q11
D110
Q402
Q14
Q12
D101
Q101
Q102
Q103
Q104
Q105
Q801
D102
D104
Q13
Q3
Q7Q9
Q901
Q902
Q903
IC4
IC6
IC1
IC8
IC2 IC
3
SW5
SEL2
SEL1
ILM
RST
CNVSS
ROM-DET
A
-
DATA
DC-
DET
PC BOARD (FOIL SIDE VIEW)