JVC KD-X120EE User manual

SERVICE MANUAL
COPYRIGHT © 2015 JVC KENWOOD Corporation No.MA606<Rev.002>
2015/4
DIGITAL MEDIA RECEIVER
MA606<Rev.002>20154SERVICE MANUAL
KD-X120EE, KD-X120EU, KD-X120U,
KD-X120UT, KD-X125EE, KD-X220E,
KD-X220EN, KD-X220EY, KD-X220J,
KD-X220U, KD-X220UR, KD-X220UT
COPYRIGHT © 2015 JVC KENWOOD Corporation
Lead free solder used in the board (material: Sn-Ag-Cu, melting point: 219 Centigrade)
Lead free solder used in the board (material: Sn-Cu, melting point: 230 Centigrade)
DETACHABLE PANEL
Mounting sleeve
(GE20342-001A)
DC cord
(QAM1329-001)
Trim Plate
(GE20363-001A)
Remote control unit
(RM-RK52M)
Model Parts number
KD-X120EE
KD-X120EU
KD-X120U
KD-X120UT
KD-X125EE
KD-X220E
KD-X220EN
KD-X220EY
KD-X220J
KD-X220U
KD-X220UR
KD-X220UT
CP-X120EED
CP-X120EUD
CP-X120UD
CP-X120UD
CP-X125EED
CP-X220ED
CP-X220ED
CP-X220ED
CP-X220JD
CP-X220UD
-
CP-X220UD
Hook
(GE40646-001A) x2
DC cord
(QAM13xx-00x)
Carrying case
(GE40521-001A)

(No.MA606<Rev.002>)2/20
SPECIFICATION
For US
• Subject to change without notice.
TUNER
FM Frequency Range 87.9 MHz - 107.9 MHz (200 kHz step)
87.5 MHz - 108.0 MHz (50 kHz step)
Channel Space Selection 50 kHz/200 kHz
Usable Sensitivity (S/N = 26 dB) 8.2 dBf (0.71 µV/75 Ω)
Quieting Sensitivity(DIN S/N = 46 dB) 17.2 dBf (2.0 µV/75 Ω)
Frequency Response (±3 dB) 30 Hz - 15 kHz
Signal-to-Noise Ratio (MONO) 64 dB
Stereo Separation (1 kHz) 40 dB
AM Frequency Range 530 kHz - 1 700 kHz (10 kHz step)
531 kHz - 1 611 kHz (9 kHz step)
Channel Space Selection 9 kHz/10 kHz
Usable Sensitivity (S/N = 20 dB) 29 dBµ(28.2 µV)
USB
USB Standard USB 1.1, USB 2.0 (Full speed)
Compatible Devices Mass storage class
File System FAT12/ 16/ 32
Maximum Supply Current DC 5 V 1 A
D/A Converter 24 Bit
Frequency Response (±1 dB) 20 Hz - 20 kHz
Signal-to-Noise Ratio (1 kHz) 105 dB
Dynamic Range 88 dB
Channel Separation 90 dB
MP3 Decode Compliant with MPEG-1/2 Audio Layer-3
WMA Decode Compliant with Windows Media Audio
AAC Decode AAC-LC ".m4a" files
WAV Decode RIFF waveform Audio Format (Linear PCM only)
FLAC Decode FLAC files
Auxiliary
Frequency Response (±3 dB) 20 Hz - 20 kHz
Input Maximum Voltage 1 000 mV
Input Impedance 30 kΩ
Audio
Maximum Output Power 50 W ×4 or 50 W ×2 + 50 W ×1 (Subwoofer = 4 Ω)
Full Bandwidth Power(at less than 1 % THD) 22 W ×4
Speaker Impedance 4 Ω- 8 Ω
Preout Level/Load (USB) 2 500 mV/10 kΩ
Preout Impedance ≤600 Ω
General
Operating Voltage (10.5 V - 16 V allowable) 14.4 V
Maximum Current Consumption 10A
Operating Temperature Range 0°C to + 40°C
Installation Size (W ×H ×D) 182 mm ×53 mm ×108 mm (7-3/16" ×2-1/8" ×4-5/16")
Weight 0.58 kg (1.3 lbs)

(No.MA606<Rev.002>)3/20
SPECIFICATION
For Europe
• Subject to change without notice.
TUNER
FM Frequency Range (KD-X220) FM: 87.5 MHz - 108.0 MHz (50 kHz step)
Frequency Range (KD-X125/KD/X120) FM: 87.5 MHz - 108.0 MHz (50 kHz step)
FM-LO: 65.0 MHz - 74.0 MHz (30 kHz step)
Usable Sensitivity (S/N = 26 dB) 0.71 µV/75 Ω
Quieting Sensitivity(DIN S/N = 46 dB) 2.0 µV/75 Ω
Frequency Response (±3 dB) 30 Hz - 15 kHz
Signal-to-Noise Ratio (MONO) 64 dB
Stereo Separation (1 kHz) 40 dB
AM Frequency Range MW 531 kHz - 1 611 kHz (9 kHz step)
LW 153 kHz - 279 kHz (9 kHz step)
Usable Sensitivity (S/N = 20 dB) MW:28.2 µV
SW:50 µV
USB
USB Standard USB 1.1, USB 2.0 (Full speed)
Compatible Devices Mass storage class
File System FAT12/ 16/ 32
Maximum Supply Current DC 5 V 1 A
D/A Converter 24 Bit
Frequency Response (±1 dB) 20 Hz - 20 kHz
Signal-to-Noise Ratio (1 kHz) 105 dB
Dynamic Range 88 dB
Channel Separation 90 dB
MP3 Decode Compliant with MPEG-1/2 Audio Layer-3
WMA Decode Compliant with Windows Media Audio
AAC Decode AAC-LC ".m4a" files
WAV Decode RIFF waveform Audio Format (Linear PCM only)
FLAC Decode FLAC files
Auxiliary
Frequency Response (±3 dB) 20 Hz - 20 kHz
Input Maximum Voltage 1 000 mV
Input Impedance 30 kΩ
Audio
Maximum Output Power 50 W ×4 or 50 W ×2 + 50 W ×1 (Subwoofer = 4 Ω)
Full Bandwidth Power(at less than 1 % THD) 22 W ×4
Speaker Impedance 4 Ω- 8 Ω
Preout Level/Load (USB) 2 500 mV/10 kΩ
Preout Impedance ≤600 Ω
General
Operating Voltage (10.5 V - 16 V allowable) 14.4 V
Maximum Current Consumption 10A
Operating Temperature Range 0°C to + 40°C
Installation Size (W ×H ×D) 182 mm ×53 mm ×108 mm
Weight 0.58 kg

(No.MA606<Rev.002>)4/20
SPECIFICATION
For ASIA
• Subject to change without notice.
TUNER
FM Frequency Range 87.5 MHz - 108.0 MHz (50 kHz step)
Usable Sensitivity (S/N = 26 dB) 8.2 dBf (0.71 µV/75 Ω)
Quieting Sensitivity(DIN S/N = 46 dB) 17.2 dBf (2.0 µV/75 Ω)
Frequency Response (±3 dB) 30 Hz - 15 kHz
Signal-to-Noise Ratio (MONO) 64 dB
Stereo Separation (1 kHz) 40 dB
AM Frequency Range Band 1 (MW): 531 kHz - 1 611 kHz (9 kHz step)
Band 2 (SW1): 2 940 kHz - 7 735 kHz (5 kHz step)
Band 3 (SW2): 9 500 kHz - 10 135 kHz /11 580 kHz - 18 135 kHz (5 kHz
step)
Channel Space Selection Band 1: 9 kHz
Band 2/3: 5 kHz
Usable Sensitivity (S/N = 20 dB) MW: 29 dBµ(28.2 µV)
SW: 30 dBµ(32 µV)
USB
USB Standard USB 1.1, USB 2.0 (Full speed)
Compatible Devices Mass storage class
File System FAT12/ 16/ 32
Maximum Supply Current DC 5 V 1 A
D/A Converter 24 Bit
Frequency Response (±1 dB) 20 Hz - 20 kHz
Signal-to-Noise Ratio (1 kHz) 105 dB
Dynamic Range 88 dB
Channel Separation 90 dB
MP3 Decode Compliant with MPEG-1/2 Audio Layer-3
WMA Decode Compliant with Windows Media Audio
AAC Decode AAC-LC ".m4a" files
WAV Decode RIFF waveform Audio Format (Linear PCM only)
FLAC Decode FLAC files
Auxiliary
Frequency Response (±3 dB) 20 Hz - 20 kHz
Input Maximum Voltage 1 000 mV
Input Impedance 30 kΩ
Audio
Maximum Output Power 50 W ×4 or 50 W ×2 + 50 W ×1 (Subwoofer = 4 Ω)
Full Bandwidth Power(at less than 1 % THD) 22 W ×4
Speaker Impedance 4 Ω- 8 Ω
Preout Level/Load (USB) 2 500 mV/10 kΩ
Preout Impedance ≤600 Ω
General
Operating Voltage (10.5 V - 16 V allowable) 14.4 V
Maximum Current Consumption 10A
Operating Temperature Range 0°C to + 40°C
Installation Size (W ×H ×D) 182 mm ×53 mm ×108 mm
Weight 0.58 kg

(No.MA606<Rev.002>)5/20
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be per-
formed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac-
teristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassem-
bling.
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
1.3 Caution
Burrs formed during molding may be left over on some parts
of the chassis.
Therefore, pay attention to such burrs in the case of pre-
forming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
1.5 Remote control
The Lithium battery is in danger of explosion if replaced incor-
rectly. Replace it only with the same or equivalent type.
1.6 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electric-
ity stored in the body, fabric, etc. is discharged, can destroy the
semi conductors. Take care to prevent this when performing re-
pairs.
1.6.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the semi conduc-
tors.
Be careful to use proper grounding in the area where repairs are
being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such
as a conductive sheet) or an iron plate over it before plac-
ing the unit on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity
built up in your body.
1M
Conductive material
(conductive sheet) or iron plate
(caption)
Anti-static wrist strap

(No.MA606<Rev.002>)6/20
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 How to repair a fuse pattern
2.1.1 Purpose of fuse pattern
In order to prevent serious damage on the circuit, fuse pattern is prepared on the GND line of RCA Terminal. This damage may
take due to improper part replacement with a external equipment via RCA line.
2.1.2 Repair Procedure
(1) Check the shorted circuit at the meltdown point.
Need to clean up if the shorted circuit or carbonization happen at the fuse pattern.
(2) Add following part on the fuse pattern.
(3) Check output level.
2.1.3 After finished repair
Due to improper part replacement, this meltdown occurs.
Thus please notice following information when the unit is returned to your customer.
Things to be checked before installing the unit.
(1) Check the GND line of external amplifier or other equipment which must connect properly.
(2) Check whether the GND line is not short-circuited with the battery terminal. (do not short-circuit these lines)
2.2 MICROCOMPUTER’S TERMINAL DESCRIPTION
IC701 (R5S726A0D216FP) on MAIN PWB ASSY
Part Number Part Name SPEC
F53-0513-08 PATTERN FUSE 4A
Pin No. Pin Name I/O Application Processing/Operation/
Description
1 LCD_INH O Display On/Off Control L: Display OFF/
H: Display ON
2 DAB_COM_ON O Enable DAB micon (For DAB model) H: ON/L: OFF
2 NC O No Use (for non DAB model)
3 PVcc - Power supply for I/O circuits
4 DZF I Zero Input Detect L: Mute OFF/H: Mute ON
5Vss -GND
6 PANEL_PON O Supply Control to Panel L: ON/H: OFF
7 DC_ERR2 I Detect DC Clip (for ST Power Amp IC) L: DC Error ON/
H: DC Error OFF
8 PWIC_MUTE O Muting Output for Power Amp IC L: Mute ON/H: Mute OFF
9 LCD_CE O LCD Driver IC Chip Enable Output (for LCD Model)
10 Vss - GND
11 LCD_CLK O LCD CLK Output
12 Vcc - Power supply
13 RGB_CLK O I2C Clock Output for RGB Driver (For RGB Model)
Meltdown point

(No.MA606<Rev.002>)7/20
13 PCB_TEST_MODE
_RX
I PCB Test Mode RX
14 LCD_DATA_SYS O LCD DATA Output (for LCD Model)
14 LCD/
RGB_DATA_SYS
O LCD and RGB DATA Output (for RGB Model)
14 PCB_TEST_MODE
_TX
O PCB Test Mode TX
15 USB_PON O Enable Output for High Side Switch L: HisideSW OFF/
H: HisideSW ON
16 PVcc - Power supply for I/O circuits
17 BT_DATA_BT I BT Data Input (For BT model only)
17 NC O No Use (for non BT model)
18 Vss - GND
19 BT_DATA_SYS O BT Data Output (For BT model only)
19 NC O No Use (for non BT model)
20 Vcc - Power supply
21 PWIC_STBY O Output to Power On Power Amp IC L: Standby/H: Play
22 SXM_DATA_SXM I SXM Data Input (For SXM model only)
22 NC O No Use (for non SXM model)
23 SXM_DATA_SYS O SXM Data Output (For SXM model only)
23 NC O No Use (for non SXM model)
24 DEBUG_1A O For Debug
24 DAB_COM_CLK O Clock to DAB (for DAB model only)
24 HD_SPICLK O Clock to HD Decoder (for HD model only)
25 DEBUG_1B O For Debug
25 DAB_REQ_SYS O Command Request from main micon to DAB micon (for DAB model)
25 HD_REQ_SYS O Command Request from SYS-com to HD (for HD model)
26 DEBUG_1C O For Debug
26 DAB_DATA__SYS O DAB Data Output (for DAB model only)
26 HD_DATA_SYS O HD Data Output (for DAB model only)
27 DAB_DATA_DAB I DAB Data Input (for DAB model only)
27 HD_DATA_HD I HD Data Input (for HD model only)
27 NC O No Use (for non DAB / HD model)
28 PVcc - Power supply for I/O circuits
29 FREQ_SEL O Frequency Select Pulse: Power On/
L: Power Off
30 Vss - GND
31 ENC2 I Volume Encoder Pulse Input 2
32 ENC1 I Volume Encoder Pulse Input 1
33 REMO I Remocon Input L (Pulse): Remote control
data/H: Standby
34 LCD_DATA_LCD I LCD DATA Intput (for LCD Model)
35 MRC_DATA_MRC I Marine REMO Data Input UART 57.6kHz (For MARINE model)
35 DEBUG_2A O For Debug
36 PVcc - Power supply for I/O circuits
37 NC O System Clock Output to External Devices (for LCD Model)
No Use
Pin No. Pin Name I/O Application Processing/Operation/
Description

(No.MA606<Rev.002>)8/20
38 Vss - GND
39 RESET I Reset Input
40 Vss - GND
41 PLLVcc - Power supply for PLL
42 PAN_DET I Panel Detection input L: Panel Attached/
H: Panel Detached
43 Vcc - Power supply
44 EXTAL I High Speed Clock 12MHz
45 XTAL O High Speed Clock 12MHz
46 Vss - GND
47 Vss - GND
48 PVcc - Power supply for I/O circuits
49 D-0 I/O USB Data- 0
50 D+0 I/O USB Data+ 0
51 ASEMD I ASE Mode Select Pin
52 NC I No Use
53 BT_MUTE I BT Mute L: Mute OFF/H: Mute ON
53 NC I No Use (for non BT model)
54 STAGE2 I Model Selecting Input 2
54 STEERING_REMO
2
I OE Remote In 2 (for DOP models)
55 STAGE1 I Model Selecting Input 1
55 STEERING_REMO
1
I OE Remote In 1 (for DOP models)
56 TEL_MUTE I Tel Mute Detection Input (for JVC Model)
56 LINE_MUTE I Line Mute Detection Input (For KWD Model)
56 No Use I No Use (for non support Tel mute model)
57 DC_ERR1 I Detect DC Offset Error from EVOL IC L: DC Error ON/
H: DC Error OFF
58 Avss - GND
59 Avcc - Power Supply
60 Avref - Reference Power Supply
61 TRST I Debugging Interface. Reset Input.
62 ASEBRKAK/ASE-
BRK
I/O Emulator Break Mode Acknoledge/Break Input
63 TDO O Debugging Interface. Serial Output for Instructions and Data
64 TDI I Debugging Interface. Serial Input for Instructions and Data
65 TMS I Debugging Interface. Test Mode Select Signal Input.
66 TCK I Debugging Interface. Test Clock Input.
67 AUDIO_X2 O Audio Clock 16.9MHz (for External DAC)
68 AUDIO_X1 I Audio Clock 16.9MHz (for External DAC)
69 PVcc - Power supply for I/O circuits
70 SPBCLK O FLASH SPI Multi I/O Bus Clock output
71 Vss - GND
72 SPBSSL O FLASH SPI Multi I/O Bus Slave Select Output
73 SPBIO0 I/O FLASH SPI Multi I/O Bus I/O Data 0
74 SPBIO1 I/O FLASH SPI Multi I/O Bus I/O Data 1
Pin No. Pin Name I/O Application Processing/Operation/
Description

(No.MA606<Rev.002>)9/20
75 SPBIO2 I/O FLASH SPI Multi I/O Bus I/O Data 2
76 Vss - GND
77 SPBIO3 I/O FLASH SPI Multi I/O Bus I/O Data 3
78 Vcc - Power supply
79 MD_CLK I Clock Mode Set (Power ON Reset)
EXTAL Pin Input Clock Ranges from 10 to 12 MHz
80 MD_BOOT I BOOT Mode Set L: Boot mode 0/
H: Boot mode 1
81 AUDIO_XOUT O DAC Audio Clock Output 16.9MHz
82 PVcc - Power supply for I/O circuits
83 DAB_PON O Control 3..3V power for DAB Module (for DAB model only) H: ON/L: OFF
83 HD_PON O Control 3.3V power for HD module (for HD model only) HD source= H: ON/
Other source= L: OFF
83 NC O No Use (for non DAB/non HD model)
84 Vss - GND
85 MUTE O Muting Output for Evol & Line Out L: Mute ON/H: Mute OFF
86 Vcc - Power supply
87 BT_RST O BT Reset Output (For BT model) L: Reset ON/
H: Reset OFF
87 NC O No Use (for non BT model)
88 DCDC6V_PON O Enable Output for DC-DC Regulator
89 SXM_PWR O Power Supply for SXM (For SXM model only) L: PWR Off/H: PWR On
89 NC O No Use (for non SXM model)
90 DAB_REQ_DAB I Command Request from DAB micon to main micon
90 NC O No Use (for non DAB model)
91 EVOL_SCL I/O I2C Clock 391kHz for E-Vol
91 EP_SCL I/O I2C Clock 391kHz for E2PROM
91 TU_SCL I/O I2C Clock 391kHz for Tuner
92 EVOL_SDA I/O I2C Data for E-Vol
92 EP_SDA I/O I2C Data for E2PROM
92 TU_SDA I/O I2C Data for Tuner
93 IPOD_SCL O iPod Authentication IC I2C Clock Clock speed 23kHz
93 NC O No Use (For non-iPod Model)
94 IPOD_SDA O iPod Authentication IC I2C Data
94 NC O No Use (For non-iPod Model)
95 REG_SCL O I2C Clock for Regulator IC
96 REG_SDA O I2C Data for Regulator IC
97 NC O No Use
98 DIM_IN I Dimmer Control Input (for JVC Model) L: Dimmer Detect ON/
H: Dimmer Detect OFF
98 NC O No Use (For KWD Model) keep L output setting
99 REG_FLG I Power Detection L: Detect OFF/
H: Detect ON
100 Vss - GND
101 PVcc - Power supply for I/O circuits
102 MRC_REQ_MRC I Command Request from Marine REMO to SYS-com
(For MARINE model)
Pin No. Pin Name I/O Application Processing/Operation/
Description

(No.MA606<Rev.002>)10/20
102 NC O No Use (for non Marine model)
103 SSISCK O DAC Audio Serial Data Clock 44.1kHz
104 SSIWS1 O DAC L/R Clock 44.1kHz
105 MRC_PON O Enable Marine REMO Power Supply (For MARINE model)
105 DEBUG 2C O For Debug H: Power On / L: Power Off
106 SSITx O Servo DSP Data Output
107 Vss - GND
108 DAC_CCLK O DAC Control Data Clock
109 Vcc - Power supply
110 DAC_CDTI O DAC control Data Input
111 TU_RST O HELIO/CAYMAN (HD) Reset L: Reset ON/
H: Reset OFF
111 NC O No Use (For non DAB/HD model)
112 PVcc - Power supply for I/O circuits
113 MRC_DATA_SYS O Marine REMO Data Output UART 57.6kHz (For MARINE model)
113 NC O No Use (for non Marine model)
114 Vss - GND
115 DAC_CS O DAC Chip Select
116 BEEP O Output for Beep Tone Generator H (Pulse): BEEP/L: OFF
117 MRC_REQ_SYS O Command Request from SYS-com to Marine REMO
(For MARINE model)
117 NC O No Use (for non Marine model)
118 PCB_TEST_MODE I PCB Test Mode Switch L: Normal Mode/H: Check
Mode (After Reset soft-
ware need to check the
pin input. If detect high it
should enter Serial Num-
ber mode)
118 WDT O Watch Dog Timer output L: Normal Mode /
H: Reset by WDT
119 MRC_EN O Marine REMO Data Select (For MARINE model)
119 DEBUG_2B O For Debug
119 Field Test 2 O RDS data log output (standby for field test)
120 Field Test 1 O RDS data log output (standby for field test)
120 FDAC_RST O DAC reset L: DAC reset/
H: DAC reset off
Pin No. Pin Name I/O Application Processing/Operation/
Description

(No.MA606<Rev.002>)11/20
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the MAIN PWB (See Fig.1 to 4)
(1) Disengage the 8 hooks a, and remove the FRONT CHAS-
SIS ASSY.
(See Fig. 1)
Fig.1
(2) Remove the 3 screws A . (See Fig. 2)
Fig.2
(3) Remove the 2 screws B. (See Fig.3)
(4) Disengage the 1 hook b, and remove the BOTTOM
COVER with MAIN PWB.
(See Fig.3)
Fig.3
(5) Disengage the 1 hook c, and remove the MAIN PWB.
(See Fig.4)
Fig.4
3.1.2 Removing the SWITCH PWB (See Fig.5)
(1) Remove the VOLUME KNOB.
(2) Remove the 4 screws D.
(3) Disengage the 11 hooks d, and remove the REAR
COVER.
(4) Remove the SWITCH PWB.
Fig.5
aa
aa
a
a
a
a
FRONT CHASSIS ASSY
A
AA
BOTTOM COVER
Bb
B
MAIN PWB c
REAR COVER
DD
d d d d
DD
d ddd
d
d
d

(No.MA606<Rev.002>)12/20
SECTION 4
ADJUSTMENT
4.1 Outline
4.1.1 Panel
A symbol "" in the key column indicates that the key should be pressed and held for 1 second or longer.
4.1.2 Test Modes
These test modes are available in normal production ROM.
Transition to Test Mode shall be available during DC Error detection.
4.1.3 Release from Test Mode
These actions will release the Test Mode and transit back to Normal Mode
RETURN
ACCENT SEARCHVOL
Test Mode Mode Source Operation
Production Test Mode - All Press and hold [DISP] key and [SOURCE] key and reset.
Service Test Mode Normal Mode /
Production Mode
All Pressing and holding [DISP] key, press [] key for 7 seconds.
(Starting to press [DISP] key and [] key at the same time can not
be entered into the mode)
Service Information Clear Mode - All Press and hold [RETURN] key and [SOURCE] key and reset.
DC Error Information Mode - All Press and hold [DISP] key and [] key and reset.
DOP Test Mode Normal Mode All Pressing and holding [SELECT] key, press [DISP] key for 7 sec-
onds.
(Starting to press [SELECT] key and [DISP] key at the same time
can not be entered into the mode)
Bluetooth Device Name Select
Mode
Normal Mode BT Audio Pressing and holding [ACCENT] key, press [DISP] key for 3 sec-
onds.
(Starting to press [ACCENT] key and [DISP] key at the same time
can not be entered into the mode)
Tunisia Area /
Tuner Span Change Mode
Normal Mode All Pressing and holding [VOL] key, press [RETURN] key for 3 sec-
onds.
Method Remarks
Reset All Modes
Momentarily voltage drop All Modes
ACC OFF All Modes
POWER OFF All Modes
Panel Detach All Modes

(No.MA606<Rev.002>)13/20
4.2 Production Test Mode
Press and hold [1] key and [3] key and reset.
4.2.1 Test Mode Defaults
During Production Test Mode, the following settings defer from the Normal Mode.
The settings will change immediately after mode activation.
4.2.2 Mode structure
The following table shows the test modes that can be accessed from the different sources in Production Test Mode.
4.2.3 Mode content
Syscon shall display the following information after entering Production Test Mode.
4.2.4 Special Operation by Key Input
4.2.5 How to transit to Version Display Mode
Difference in action Setting value
Period to prohibit TEL/LINE MUTE function (Normal Mode: 10 secs) 1 second
Writing-in to E2PROM when DC error is detected Prohibited
"DEMO" item in Setup Menu OFF
Power supply during ACC OFF (Back Up On) MUTE terminal turns OFF after 2 seconds
"BEEP" item in Setup Menu ON
Volume range 0 to 44
Source change interval timer 0 seconds
When detected the 0 bit mute Mute off
Various setting item Setting value
Default Volume 15
"BASS BOOST" OFF
"LOUDNESS" OFF
"TEL MUTING" ON
Initial Source FM (Mechaless Models) /
CD (Non-Mechaless Models)
Language English
EQ FLAT
Fader / Balance Center
Digital Track Expander / Sound Reconstruction Set OFF
"VOL ADJUST" / "VOLUME OFFSET" 0
DEMO Mode Setting OFF
Source Test mode
Tuner TUNER Test Mode
USB USB Test Mode
Display content Details
All lights on (BOTH LCD & LED including dual color switchable)
Set should not be able to power on if sub clock is not functioning.
The display is released when another operation is executed.
Behaviour Details
Volume Adjustment to 44
Only during Normal display
(Invalid during Menu)
Pressing and holding [DISP] key, press [] key for 0.5 seconds.
(Starting to press [DISP] key and [] key at the same time can not be entered into
the mode)
Item Operation Display content Details
Transit to Display
Mode RETURN Transit to Version Display Mode
(Default status: All Lights ON)

(No.MA606<Rev.002>)14/20
4.2.6 Version Display Mode
4.2.7 Tuner Test Mode Specification
The following display shall be indicated according to the TUNER status.
*Not applicable and no function for HD and DAB models
Item Operation Display content Details
All Lights ON/
TEST
DISP
(Toggle)
All lights ON
Syscom version
display
## = File Number
@@@ = Syscon Version Number
Stage Setting ##: Stage Setting for current hardware
Serial No. display
Serial No. Display (8 digits)
Display to support ASCII characters
********: Blank
@@@@@@@@: EEPROM Read Error
iPod IC Mount
VerificationStatus
Display
(USB models
only)
## = Blank: Verifying
OK: IC mounted
NG: IC not mounted
**: Non iPod support model
In addition, upon entering this mode, P-CON is
turned ON.
When a result is OK, P-CON is turned off.
Upon exit, P-CON remains OFF.
When a result is NG, P-CON is kept ON condition.
Upon exit, P-CON remains ON.
Pre-out Switch
(1 Pre-out / 2 Pre-
out model only)
EQ
Switch Pre-out with toggle
Mode release SOURCE
Transition
Return to Normal mode
Mode release RETURN Return to Normal mode
Y–SS##@@@
TSAGE :21 ##
SN 00000000
iPod ##
L/O SUB.W
Status Display content Details
TUNER IC
Communication Error
Communication to TUNER IC not available
(indicated unless the mode is in Clock Display Mode).
RDS/RBDS Specified
data reception
Turn OFF P-CON forcibly if PS=RDS TEST is received.
P-CON recovers with Power OFF/ON.
TUN CON NG
DRS STTE
Item Operation Display content Details
TUNER IC display EQ
Display TUNER IC version
'AT2 ********' is eg "AtomIC2 57V1B101" indicating
"AtomIC2 TEF6657V1B 1.01"
TA2********

(No.MA606<Rev.002>)15/20
4.2.8 USB Test Mode Specification
Applicable for iPod model only.
4.3 Service Test Mode
In the STANDBY source, while pressing and holding [2] key, press [6] key for 7 seconds.
(Starting to press [2] key and [6] key at the same time can not be entered into the mode)
4.3.1 Default status immediately after the mode activation
It shall be same as the normal activation.
4.3.2 Mode content
Syscon shall display the following information after entering this mode.
4.3.3 Common operation mode for only STANDBY sources
Status Display content Details
iPod IC Mount Verification Status
Display
## = Blank: Verifying
NG: IC not mounted
**: Non iPod support model
Upon source change to USB source or USB
device plug in:
Verifying: Show "iPod: ##"
NG: Always show "iPod: NG" even during "NO
DEVICE" or playback.
**: Always show "iPod: **" even during "NO
DEVICE"
OK: Change back to nomal display ("NO DE-
VICE / normal playback display).
In addition, upon enter to this mode, P-CON is
turned ON.
When a judgment result is OK, P-CON is
turned off.
Upon exit, P-CON still remain OFF.
When a judgment result is NG, P-CON is kept
ON condition.
Upon exit, P-CON still remain ON.
iPod ##
Display content Details
Display is released when an operation is executed.
RSVT TES
Item Operation Display content Details
Syscom version
display 6## = File Number @@@ = Syscon Version Number
Power ON
duration display 2
00 to 50 are displayed in "XX".
For less than 1 hour, the display is indicated per 10
minutes.
00001 to 10922 are displayed in "XXXXX".
MAX 10922 (hours)
Y–SS##@@@
OPNTM HX0X
OPNTM XXXXX

(No.MA606<Rev.002>)16/20
4.4 Service Information Clear Mode
Press and hold [2] key and [5] key and reset.
4.4.1 Default status immediately after the mode activation
It shall be same as normal activation.
4.4.2 Mode content
After entering this mode, Syscon shall clear the information stored for service and output the result to the display.
Cleared information changes will take place only after reset.
The following table shows the data that is cleared.
4.5 DC Error Information Mode
Press and hold [3] key and [6] key and reset.
4.5.1 Default status immediately after the mode activation
It shall be same as normal activation.
4.5.2 Mode content
Syscon shall display the following information after entering this mode.
Display Display content Details
Data Clear in
Progress
Data Clearing in Progress.
Data Clear OK Data cleared successfully.
Data Clear NG Data cleared with error, clear the data.
IIINTALIZE
TDA A CLR OK
TDA A CLR NG
Display Blinks (250ms interval)
Information to Clear Details Storage area
Service information CD EJECT number of times display E2PROM
Forced Power OFF information display E2PROM
DC error information DC error 1 display (wrong connection & other detection information in detecting duration) E2PROM
DC error 2 display (capacitor leakage detection number information) E2PROM
Tuner information
Tuner Area Setting E2PROM
Preset Frequency E2PROM
Preset PI code E2PROM
Tagging information Token data memory index E2PROM
Display content Details
When DC error is detected
When DC error is not detected
DC ERR
DC OK
Item Operation Display content Details
DC ERR1display 
When wrong connection & DC error in other detec-
tion duration is detected.
When wrong connection & DC error in other detec-
tion duration is not detected.
DC ERR1 clear 
Clear detection information when wrong connection
& DC error in other detection duration is displayed.
(Clear data flash)
DC ERR2 display 
Display detecting number of times in capacitor leak-
age detection duration.
#: 0 to 4
DC ERR2 clear 
Clear number of times for detection information in
capacitor leakage detection duration. (Clear data
flash)
DC 1 ER R
DC1 OK
DC1 OK
DC2 4
DC 2 0

(No.MA606<Rev.002>)17/20
4.6 DOP Test Mode
Pressing and holding [SELECT] key, press [DISP] key for 7 seconds.
4.6.1 DOP Mode Common Setting
Common settings for all car makers are as follows:
Demo: No demo animation
Remove all DEMO related items
Power on animation: Show carmaker's name
Only opening animation will show "Car maker's name"
Setup menu: Delete Demo
Color setting for RGB model: Refer to manufacturer preference below:
4.6.2 EEPROM DOP Read Error Display
In the case of an EEPROM read error or EEPROM DOP read error, the unit will behave accordingly.
(1) No Power on animation
(2) No Demo animation
(3) Demo removed in setup menu
(4) Color settings set to default
(5) Serial number display replaced by "SN @@@@@@@@"
4.6.3 Mode content
1) Enter DOP Mode. Pressing and holding [SELECT] key, press [DISP] key for 7 seconds.
2) Select manufacturer setting.
Note: RGB color save as USER color. DEFAULT color set to USER.
The order is priority. Lower Priority brand need to press and hold(2 secs)
: press and hold (2 second) on button mentioned as follow
Display content Details
PMODEDO
Display content Operation Display content Color
No Demo 1 Blue 7
Toyota 2 Lime 25
Honda 3 Blue 5
Ford 4 Greenish Blue 3
Suzuki 5 Yellow Amber
(same as Daihatsu) 16
Hyundai 6 Blue 7
Mitsubishi Apple 14
FIAT White User
Iveco DISP White User
Alfa Romeo 1Red 13
KIA 2Blue 7
Volkswagen 3White User
Chevrolet 4Red 13
Peugeot 5Green 24
Nissan 6Orange 16
Isuzu Red 13
Skoda Yellowish Green User (R=22, G=31, B=0)
Daihatsu DISP Yellow Amber
(Same as Suzuki) 15
Default RETURN Return to default JVC normal setting.
JVC
TOYOTA
HONDA
FORD
SUZUK I
HYUNDA I
MI TSUB ISH I
FIAT
IVECO
ALFA ROMEO
KIA
VO L KSWAGEN
CHE VROL ET
PEUGEOT
NISSAN
ISUZU
SKODA
DA IHATSU
DE FAULT

(No.MA606<Rev.002>)18/20
4.7 Tuner Span Change Mode
Pressing and holding [VOL] key, press [RETURN] key for 3 seconds.
4.7.1 Default status immediately after the mode activation
It shall be same as normal activation.
After selection of the setting item, the receiver should exit this mode and return to the display before entering this mode.
This setting will be stored in EEPROM.
4.7.2 Mode content
Syscon shall display the following information after entering this mode.
*1: Only applicable for Asia ('U') models
*2: Only applicable for Europe ('E') models
Item Operation Display content Details
Tuner Span
Change Mode
(*1)
VOL +/-
Default setting for Asia models.
Change to 'Asia' area type.
Change to 'Tunisia' area type.
Tuner Span
Change Mode
(*2)
VOL +/-
Default setting for Europe models.
Change to 'Europe' area type.
Change to 'Tunisia' area type.
Release Mode VOL Depending on display pattern in normal mode.
ARE A AS I A
AREA TUNISIA
AREA EUROP E
AREA TUNISIA

(No.MA606<Rev.002>)19/20
4.8 DC Offset error description
4.8.1 DC Offset detection circuit design
• Purpose:
To prevent breakdown, when occur DC offset between speak-
er output "+" and "-".
• Target:
Detect DC offset, then stop the Power Amp operation and shift
to specified condition.
4.8.2 Possible causes of DC offset at speaker output lines
(1) Mis-connection for Speaker output for example touch to car
body or battery line.
(2) Current leak of coupling capacitor for Power IC input.
(3) Current leak of AC-GND capacitor for Power IC AC-GND.
(4) Capacitor shorted of above parts due to foreign object.
4.8.3 Type of checking
4.8.3.1 To detect DC Offset Error
• Mis-connection
- Short any one speaker out line to GND or Vcc
• Capacitor leak
- Parallel 330kΩto either any one of coupling cap or AC-GND
capacitor (to simulate current leakage of capacitor)
- Shorted either any one of coupling capacitor or AC-GND ca-
pacitor.
4.8.4 Detection Timing chart
4.8.5 Manipulate after detect DC Offset
• If detected error 10 consecutive times, and 10th error occurred
in "Mis-connect detection period", judge as "Mis-connect".
• If detected error 10 consecutive times, and 10th error occurred
in "Capacitor leak detection period", judge as "Capacitor leak ".
• If detected error 10 consecutive times, and 10th error occurred
in "Other detection period" and detected another 10 errors con-
secutively, then judge as "Other".
• If judge as "Mis-connect".
- turn off speaker output.
- display "MISWIRING", check wiring connection then reset.
- key access disable except button of Eject, Reset and service
mode
- record error in EEPROM "DC1 ERR"
- the product is able to be recovered by Reset button.
• If judge as "Capacitor leak ".
- turn off speaker output.
- display "WIRING", check wiring connection then reset.
- key access disable except button of Eject, Reset and service
mode
- record error in EEPROM "DC2 #" (# means counter number)
- the product can be recovered by pressing the Reset button
before the capacitor leak error counter reach "DC2 4".
After that, only clear the counter back to "0" can recover the
product.
• If judge as "Other" (manipulation same as mis-connect)
SECTION 5
TROUBLESHOOTING
5.1 How to cancel DC offset error
Check to be sure the terminals of the speaker leads are covered
with insulating tape properly, then reset the product.
If an error message does not disappear even after a reset, there
is a need for internal repair.
5.2 How to clear DC offset error recorded in EEPROM
Refer to “4.5 DC Error Information Mode”.
E-Vol Audio Pwr Amp
Micon
In 1
In 2
In 3
In 4
AcGnd
Offset Detect
Out
ADC In
R4
C3
R3
R1
R2
Sw5V
C-ac2C-ac1
C-tc
Win_TC
Win_In
DC Error
C-in
C-in
C-in
C-in
PWIC_STBY
PWIC_MUTE
A
UD_MUTE
1.5sec or more
0.7sec or more
1.0sec
50ms
or more
Missconnect
detection period
Capacitor leak
detection period
Other (miss detection etc.)
detection period
2.0sec or more
0.8sec

(No.MA606<Rev.002>)
VSE
Printed in Japan
JVC KENWOOD Corporation
CE Segment 2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525, Japan