Jvc KD-S88-BTJ, KD-S48-J, KD-R729-BTUR, KD-R728-BTJ, KD-R726-UT Service Manual
...
SERVICE MANUAL
CD RECEIVER
MA492<Rev.003>20117SERVICE MANUAL
KD-A725J, KD-R720J, KD-R721BTE,
KD-R721BTEU, KD-R721BTEY, KD-R726U,
KD-R726UH, KD-R726UT, KD-R727BTEE,
KD-R728BTJ, KD-R729BTUR, KD-S48J,
KD-S88BTJ
KD-R721BT, KD-R727BT,
KD-R728BT, KD-R729BT
COPYRIGHT © 2011 Victor Company of Japan, Limited
For
For KD-A725, KD-R720, KD-R726, KD-S48,KD-S88BT For KD-R721BT, KD-R727BT, KD-R728BT, KD-R729BT
For KD-A725, KD-R720,
KD-R721BT, KD-R726,
KD-R728BT, KD-R729BT,
KD-S48, KD-S88BT
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)
For KD-A725, KD-R720,
KD-R728BT, KD-S48, KD-S88BT
For KD-R721BT, KD-R727BT
For KD-A725,
KD-R720, KD-R728BT,
KD-S48, KD-S88BT
For KD-A725,
KD-R720, KD-S48,
KD-S88BT
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
COPYRIGHT © 2011 Victor Company of Japan, Limited
No.MA492<Rev.003>
2011/7
SPECIFICATION
KD-A725/KD-R720/KD-S48/KD-S88BT
AUDIO AMPLIFIER SECTION
Power Output 20 W RMS × 4 Channels at 4 Ω and ≤ 1% THD+N
Signal-to-Noise Ratio 80 dBA (reference: 1 W into 4 Ω)
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Frequency Response 40 Hz to 20 000 Hz
Line-Out or Subwoofer-Out Level / Impedance
Output Impedance ≤ 600 Ω
Other Terminal
TUNER SECTION
Frequency Range FM with channel interval set to 200 kHz 87.9 MHz to 107.9 MHz
FM Tuner Usable Sensitivity 9.3 dBf (0.8 µV/75Ω)
AM Tuner Sensitivity/Selectivity 20 µV/40 dB
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format (MPEG1/2 Audio Layer 3)
WMA (Windows Media
USB SECTION
USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Max. 12 Mbps
Compatible Device Mass Storage Class (except HDD)
Compatible File System FAT 32/ 16/ 12
Playable Audio Format MP3/ WMA/ WAV
Max. Current DC 5 V 1 A
Output Power (For KD-S48) DC 5 V 1 A , USB input terminal (front/rear)
BLUETOOTH SECTION
Version Bluetooth 2.1 certified (+EDR)
Profile HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3, PBAP 1.0
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C (32°F to 104°F)
Dimensions (W× H × D) : (approx.) Installation Size 182 mm × 52 mm × 158 mm (7-3/16” × 2-1/16” × 6-1/4”)
Mass 1.3 kg (2.9 lbs) (excluding accessories)
(R)
Audio) Decoding Format
• Subject to change without notice.
• If a kit is necessary for your car, consult your telephone directory for the nearest car audio speciality shop.
2.5 V/20 kΩ load (full scale)
AUX (auxiliary) input jack, USB input terminal, USB rear cable, Expansion port, Antenna terminal
50 kHz 87.5 MHz to 108.0 MHz
AM with channel interval set to 10 kHz 530 kHz to 1 700 kHz
9 kHz 531 kHz to 1 611 kHz
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation: 40 dB
102 dB (For KD-S48)
Max. Bit Rate 320 kbps
Max. Bit Rate 320 kbps
Panel Size 188 mm × 59 mm × 9 mm (7-7/16” × 2-3/8” × 3/8”)
1-2 (No.MA492<Rev.003>)
KD-R721BT, KD-R727BT, KD-R729BT
AUDIO AMPLIFIER SECTION
Maximum Power Output 50 W per channel
Continuous Power Output (RMS)
20 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 1% total harmonic distortion.
Signal-to-Noise Ratio 70 dB
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Frequency Response 40 Hz to 20 000 Hz
Line-Out or Subwoofer-Out Level / Impedance
2.5 V/20 kΩ load (full scale)
Output Impedance ≤ 600 Ω
Other Terminal
USB input terminal, USB rear cable, Auxiliary input jack, Antenna input
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz
LW [For KD-R727] 65.0 MHz to 74.0 MHz
AM MW 531 kHz to 1 611 kHz
LW 153 kHz to 279 kHz
FM Tuner Usable Sensitivity 9.3 dBf (0.8 µV/75Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation: 40 dB
MW Tuner Sensitivity/Selectivity 20 µV/40 dB
LW Tuner Sensitivity 50 µV
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Signal-to-Noise Ratio 102 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format (MPEG1/2 Audio Layer 3)
WMA (Windows Media
(R)
Audio) Decoding Format
Max. Bit Rate: 320 kbps
Max. Bit Rate: 192 kbps
USB SECTION
USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Max. 12 Mbps
Compatible Device Mass Storage Class (except HDD)
Compatible File System FAT 32/ 16/ 12
Playable Audio Format MP3/ WMA/ WAV
Output Power DC 5 V 1 A, USB input terminal (front/rear)
BLUETOOTH SECTION
Version Bluetooth 2.1 certified (+EDR)
Power Class Class 2 Radio
Service Area 10 m
Profile HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3, PBAP 1.0
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C
Dimensions (W× H × D) : (approx.) Installation Size 182 mm × 52 mm × 158 mm
Panel Size 188 mm × 59 mm × 9 mm
Mass 1.3 kg (excluding accessories)
•
Subject to change without notice.
(No.MA492<Rev.003>)1-3
KD-R726
AUDIO AMPLIFIER SECTION
Maximum Power Output 50 W per channel
Continuous Power Output (RMS)
20 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 1% total harmonic distortion.
Signal-to-Noise Ratio 70 dB
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Frequency Response 40 Hz to 20 000 Hz
Line-Out or Subwoofer-Out Level / Impedance
5.0 V/20 kΩ load (full scale)
Output Impedance ≤ 600 Ω
Other Terminal
USB input terminal, USB rear cable, Auxiliary input jack, Antenna input
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz
AM 531 kHz to 1 611 kHz
FM Tuner Usable Sensitivity 9.3 dBf (0.8 µV/75Ω)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation: 40 dB
AM Tuner Sensitivity/Selectivity 20 µV/40 dB
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Signal-to-Noise Ratio 98 dB
Wow and Flutter
MP3 Decoding Format (MPEG1/2 Audio Layer 3)
WMA (Windows Media
(R)
Audio) Decoding Format
Less than measurable limit
Max. Bit Rate: 320 kbps
Max. Bit Rate: 320 kbps
USB SECTION
USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Max. 12 Mbps
Compatible Device Mass Storage Class (except HDD)
Compatible File System FAT 32/ 16/ 12
Playable Audio Format MP3/ WMA/ WAV
Max. Current DC 5 V 1 A
BLUETOOTH SECTION
Version Bluetooth 2.1 certified (+EDR)
Profile HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3, PBAP 1.0
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C
Dimensions (W× H × D) : (approx.) Installation Size 182 mm × 52 mm × 158 mm
Panel Size 188 mm × 59 mm × 9 mm
Mass 1.3 kg (excluding accessories)
• Subject to change without notice.
1-4 (No.MA492<Rev.003>)
KD-R728BT
AUDIO AMPLIFIER SECTION
Power Output 20 W RMS × 4 Channels at 4 Ω and ≤ 1% THD+N
Signal-to-Noise Ratio 80 dBA (reference: 1 W into 4 Ω)
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Frequency Response 40 Hz to 20 000 Hz
Line-Out or Subwoofer-Out Level / Impedance
Output Impedance ≤ 600 Ω
Other Terminal
TUNER SECTION
Frequency Range FM
FM Tuner Usable Sensitivity 9.3 dBf (0.8 µV/75Ω)
AM Tuner Sensitivity/Selectivity 20 µV/40 dB
CD PLAYER SECTION
Type Compact disc player
Signal Detection System Non-contact optical pickup (semiconductor laser)
Number of Channels 2 channels (stereo)
Frequency Response 5 Hz to 20 000 Hz
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format (MPEG1/2 Audio Layer 3)
WMA (Windows Media
USB SECTION
USB Standard USB 1.1, USB 2.0
Data Transfer Rate (Full Speed) Max. 12 Mbps
Compatible Device Mass Storage Class (except HDD)
Compatible File System FAT 32/ 16/ 12
Playable Audio Format MP3/ WMA/ WAV
Max. Current DC 5 V 1 A
BLUETOOTH SECTION
Version Bluetooth 2.1 certified (+EDR)
Power Class Class 2 Radio
Service Area 10 m (10.9 yd)
Profile HFP 1.5, OPP 1.1, A2DP 1.2, AVRCP 1.3, PBAP 1.0
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C (32°F to 104°F)
Dimensions (W× H × D) : (approx.) Installation Size 182 mm × 52 mm × 158 mm (7-3/16” × 2-1/16” × 6-1/4”)
Mass 1.3 kg (2.9 lbs) (excluding accessories)
• Subject to change without notice.
(R)
Audio) Decoding Format
2.5 V/20 kΩ load (full scale)
AUX (auxiliary) input jack, USB input terminal, USB rear cable, Antenna terminal
with channel interval set to
AM
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation: 40 dB
Max. Bit Rate: 320 kbps
Max. Bit Rate: 320 kbps
Panel Size 188 mm × 59 mm × 9 mm (7-7/16” × 2-3/8” × 3/8”)
with channel interval set to 10 kHz 530 kHz to 1 700 kHz
200 kHz 87.9 MHz to 107.9 MHz
50 kHz 87.5 MHz to 108.0 MHz
9 kHz 531 kHz to 1 611 kHz
• If a kit is necessary for your car, consult your telephone directory for the nearest car audio speciality shop.
(No.MA492<Rev.003>)1-5
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purposes. 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 performed 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 characteristics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Service 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 characteristics 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 reassembling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
Good earth ground
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 preforming 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)
each exposed
metal part.
1-6 (No.MA492<Rev.003>)
Loading...