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Extracted text from Jvc KWADV 794 J Service Manual (Ocr-read)
Page 1
1-2 (No.MA493)
SPECIFICATION
*1 Only for KW-ADV794/KW-AVX748/KW-AVX740
*2 Only for KW-ADV794/KW-AVX740/KW-AVX640.
Design and specifications are subject to change without notice.
If a kit is necessary for your car, consult your telephone directory for the nearest car audio speciality shop.
KW-ADV794J/KW-AVX748JW/KW-AVX740J/KW-AVX640J
AMPLIFIER
Power Output 20 W RMS × 4 Channels at 4 -„¦ and
-‰¤ 1% THD+N
Signal-to-Noise Ratio 80 dBA (reference: 1 W into 4 -„¦)
Load Impedance 4 -„¦ (4 -„¦ to 8 -„¦ allowance)
Equalizer Control Range Level ±12 dB
Audio Output Level
FRONT OUT, REAR OUT, SUBWOOFER OUT Line-Out Level/Impedance 4 V/20 k-„¦ load (full scale)
Output Impedance 1 k-„¦
Video Output (composite)
VIDEO OUTColor System
PAL/NTSC
Video-Out Level/Impedance 1 Vp-p/75-„¦
Other Terminals Input
LINE IN, VIDEO IN, CAMERA IN, USB input, MIC IN*1, AUX, Antenna input
Others Expansion port*2, OE REMOTE, RGB input
FM/AM TUNER
Frequency Range FM with channel interval set to 200 kHz 87.9 MHz to 107.9 MHz
with channel interval set to 50 kHz 87.5 MHz to 108.0 MHz
AM with channel interval set to 10 kHz 530 kHz to 1 700 kHz
with channel interval set to 9 kHz 531 kHz to 1 611 kHz
FM Tuner Usable Sensitivity 9.3 dBf (0.8 µV/75 -„¦)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 -„¦)
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
DVD/CD
Signal Detection System Non-contact optical pickup (semiconductor laser)
Frequency Response DVD, fs=48 kHz/96 kHz 16 Hz to 22 000 Hz
VCD/CD 16 Hz to 20 000 Hz
Dynamic Range 93 dB
Signal-to-Noise Ratio 95 dB
Wow and Flutter Less than measurable limit
USB
USB Standards USB 2.0 Full Speed
Data Transfer RateFull Speed Maximum 12 Mbps
Low Speed Maximum 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Max. Current DC 5 V 1A
BLUETOOTH (Only for KW-ADV794/KW-AVX748/KW-AVX740)
Version Bluetooth 2.0 certified
Output Power +4 dBm Max. (Power class 2)
Service Area Within 10 m (10.9 yd)
ProfileHFP (Hands-Free Profile) 1.5
OPP (Object Push Profile) 1.1
A2DP (Advanced Audio Distribution Profile) 1.2
AVRCP (Audio/Video Remote Control Profile) 1.3
PBAP (Phone Book Access Profile) 1.0
MONITOR
Screen Size 6.1 inch wide liquid crystal display
Number of Pixel
1 152 000 pixels : 800 (horizontal) × 3 (RGB) × 480 (vertical)
Drive Method TFT (Thin Film Transistor) active matrix format
Color System NTSC/PAL
Aspect Ratio 16:9 (wide)
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Storage Temperature -10°C to +60°C (14°F to 140°F)
Allowable Operating Temperature 0°C to +40°C (32°F to 104°F)
Dimensions (W × H × D) Installation Size (approx.) 182 mm × 111 mm × 160 mm (7-3/16 × 4-3/8 × 6-5/16)
Panel Size (approx.) 188 mm × 117 mm × 10 mm (7-7/16 × 4-5/8 × 7/16)
Mass (approx.) 2.3 kg (5.1 lbs) (including the Trim plate and Sleeve)
Page 2
(No.MA493)1-3 * Only for KW-AVX740,KW-AVX746
Design and specifications are subject to change without notice.KW-AVX740E/KW-AVX640E/KW-AVX746EU/KW-AVX646EU
AMPLIFIER
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output (RMS) Front/Rear 20 W per channel into 4 -„¦, 40 Hz to 20 000 Hz at no more than 0.8%
total harmonic distortion
Load Impedance 4 -„¦ (4 -„¦ to 8 -„¦ allowance)
Equalizer Control Range Level ±12 dB
Signal-to-Noise Ratio 70 dB
Audio Output Level
FRONT OUT, REAR OUT,
SUBWOOFER OUTLine-Out Level/Impedance4 V/20 k-„¦ load (full scale)
Output Impedance1 k-„¦
Video Output (composite)
VIDEO OUTColor System PAL/NTSC
Video-Out Level/Impedance
1 Vp-p/75 -„¦
Other Terminals Input
LINE IN, VIDEO IN, CAMERA IN, USB input, MIC IN*, AUX, Aerial input
Others OE REMOTE, RGB input
FM/AM TUNER
Frequency Range FM 87.5 MHz to 108.0 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/75 -„¦)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 -„¦)
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
DVD/CD
Signal Detection System Non-contact optical pickup (semiconductor laser)
Frequency Response DVD, fs=48 kHz/96 kHz 16 Hz to 22 000 Hz
VCD/CD 16 Hz to 20 000 Hz
Dynamic Range 93 dB
Signal-to-Noise Ratio 95 dB
Wow and Flutter Less than measurable limit
USB
USB Standards USB 2.0 Full Speed
Data Transfer Rate Full Speed Maximum 12 Mbps
Low Speed Maximum 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Max. Current DC 5 V 1A
BLUETOOTH (Only for KW-AVX740A/KW-AVX746)
Version Bluetooth 2.0 certified
Output Power +4 dBm Max. (Power class 2)
Service Area Within 10 m
ProfileHFP (Hands-Free Profile) 1.5
OPP (Object Push Profile) 1.1
A2DP (Advanced Audio Distribution Profile) 1.2
AVRCP (Audio/Video Remote Control Profile) 1.3
PBAP (Phone Book Access Profile) 1.0
MONITOR
Screen Size 6.1 inch wide liquid crystal display
Number of Pixel
1 152 000 pixels : 800 (horizontal) × 3 (RGB) × 480 (vertical)
Drive Method TFT (Thin Film Transistor) active matrix format
Color System PAL/NTSC
Aspect Ratio 16:9 (wide)
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Storage Temperature -10°C to +60°C
Allowable Operating Temperature 0°C to +40°C
Dimensions (W × H × D) Installation Size (approx.) 182 mm × 111 mm × 160 mm
Panel Size (approx.) 188 mm × 117 mm × 10 mm
Mass (approx.) 2.3 kg (including the Trim plate and Sleeve)
Page 4
(No.MA493)1-5 * Only for KW-AVX746
Design and specifications are subject to change without notice.KW-AVX746A/KW-AVX746U,UT/KW-AVX646U,KW-AVX648UF
AMPLIFIER
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output (RMS) Front/Rear 20 W per channel into 4 -„¦, 40 Hz to 20 000 Hz at no more than 0.8% total
harmonic distortion
Load Impedance 4 -„¦ (4 -„¦ to 8 -„¦ allowance)
Equalizer Control Range Level ±12 dB
Signal-to-Noise Ratio 70 dB
Audio Output Level
FRONT OUT, REAR OUT,
SUBWOOFER OUTLine-Out Level/Impedance4 V/20 k-„¦ load (full scale)
Output Impedance1 k-„¦
Video Output (composite)
VIDEO OUTColor System PAL/NTSC
Video-Out Level/Impedance
1 Vp-p/75 -„¦
Other Terminals Input
LINE IN, VIDEO IN, CAMERA IN, USB input, MIC IN*, AUX, Aerial input
Others OE REMOTE, RGB input
FM/AM TUNER
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/75 -„¦)
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 -„¦)
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
DVD/CD
Signal Detection System Non-contact optical pickup (semiconductor laser)
Frequency Response DVD, fs=48 kHz/96 kHz 16 Hz to 22 000 Hz
VCD/CD 16 Hz to 20 000 Hz
Dynamic Range 93 dB
Signal-to-Noise Ratio 95 dB
Wow and Flutter Less than measurable limit
USB
USB Standards USB 2.0 Full Speed
Data Transfer Rate Full Speed Maximum 12 Mbps
Low Speed Maximum 1.5 Mbps
Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Max. Current DC 5 V 1A
BLUETOOTH (Only for KW-AVX746)
Version Bluetooth 2.0 certified
Output Power +4 dBm Max. (Power class 2)
Service Area Within 10 m
ProfileHFP (Hands-Free Profile) 1.5
OPP (Object Push Profile) 1.1
A2DP (Advanced Audio Distribution Profile) 1.2
AVRCP (Audio/Video Remote Control Profile) 1.3
PBAP (Phone Book Access Profile) 1.0
MONITOR
Screen Size 6.1 inch wide liquid crystal display
Number of Pixel
1 152 000 pixels : 800 (horizontal) × 3 (RGB) × 480 (vertical)
Drive Method TFT (Thin Film Transistor) active matrix format
Color System PAL/NTSC
Aspect Ratio 16:9 (wide)
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Storage Temperature -10°C to +60°C
Allowable Operating Temperature 0°C to +40°C
Dimensions (W × H × D)
Installation Size (approx.)182 mm × 111 mm × 160 mm
180 mm × 100 mm × 160 mm (KW-AVX648)
Panel Size (approx.) 188 mm × 117 mm × 10 mm
Mass (approx.) 2.0 kg
Page 8
(No.MA493)1-9
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
SECTION 3
DISASSEMBLY
3.1 Main body (Used model: KD-AVX740)
3.1.1 Removing the Front chassis (See Fig.1 and 2)
(1) Remove the three screws A. (See Fig.1)
(2) Disengage two hooks a engaged the Front chassis. (See
Fig.1)
Fig.1
(3) Remove the four screws B attaching the both side of the
Front chassis. (See Fig.2)
(4) Disengage two hooks b engaged both side of the Front
chassis. (See Fig.2)
Fig.23.1.2 Removing the Heat sink (See Fig.3)
(1) Remove the three screws C and two screws D attaching
the Heat sink.
Fig.3
3.1.3 Removing the Rear heat sink (See Fig 4)
(1) Remove the two screws E and two screws F attaching the
Rear heat sink
Fig.4
3.1.4 Removing the DVD mechanism (See Fig.5, 6, 7, 8, 9)
(1) Disconnect the card wire from DVD mechanism connected
to connector CN105
of the Main board. (See Fig.5)
Fig.5
a
A
b
B
C
D
EF
CN105
Page 12
(No.MA493)1-13 (4)
Remove the five screws A attaching the Top cover assembly. (See Fig. 3)
Fig.3
(5) From the bottom side, disconnect the connector wire from
Top cover assembly connected to connector CN2
of the
Front end board. (See Fig.4)
Fig.4
(6) From the bottom side, remove the spring from Traverse
mechanism assembly. (See Fig.5)
Fig.5
(7 ) From the top side, pull up the traverse mechanism and disengage
three dumper positions. (See Fig.6 )
Fig.63.2.2 Removing the Front end board (See Fig.7)
(1) Remove the Motor wires from loading motor soldered to
TP79
and TP81 of the Front end board.
(2) Remove the two screws B attaching the Front end board.
Fig.7
3.2.3 Removing the Loading arm assembly (See Fig.8)
(1) Remove the Loading arm spring L from Loading arm assembly.
(2) Slide to left side and then disengage hook a then hook b.
Fig.8
3.2.4 Removing the Gear base assembly (See Fig.9, 10)
(1) Remove the Loading arm spring L. (See Fig.9)
Fig.9 A
CN2
Dumper
(Different color sprin
BB
TP79TP81
Loading arm
assembly
Loading arm spring Lhook
a
hook b
Loading arm
spring L
Page 21
(No.MA493)
VSE Printed in Japan
Victor Company of Japan, Limited
Mobile Entertainment Division 2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525, Japan
