Jvc KDG 645 UN Service Manual

This is the 32 pages manual for Jvc KDG 645 UN Service Manual.
Read or download the pdf for free. If you want to contribute, please mail your pdfs to info@audioservicemanuals.com.

Page: 1 / 32
left right
Jvc KDG 645 UN Service Manual

Extracted text from Jvc KDG 645 UN Service Manual (Ocr-read)

Page 1

1-2 (No.MA377) SPECIFICATION KD-G441/KD-G351 Design and specifications are subject to change without notice.AUDIO AMPLIFIER SECTION Maximum Power Output Front/Rear 50 W per channel Continuous Power Output (RMS) Front/Rear 19 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) Tone Control Range Bass ±12 dB at 60 Hz Middle ±12 dB at 1 kHz Treble ±12 dB at 10 kHz Frequency Response 40 Hz to 20 000 Hz Signal to Noise Ratio 70 dB Audio Output Level (for KD-G441) Line-Out Level/Impedance 2.5 V/20 k-„¦ load (full scale) Output Impedance 1 k-„¦ Subwoofer-Out Level/Impedance 2.5 V /20 k-„¦ load (full scale) Other Terminals AUX (auxiliary) input jack USB input jack Steering wheel remote input (forKD-G441) TUNER SECTION Frequency Range FM 87.5 MHz to 108.0 MHz AM MW: 522 kHz to 1 620 kHz LW: 144 kHz to 279 kHz FM Tuner Usable Sensitivity 11.3 dBf (1.0 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 30 dB MW Tuner Sensitivity/Selectivity 20 µV/35 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 Dynamic Range 96 dB Signal-to-Noise Ratio 98 dB Wow and Flutter Less than measurable limit MP3 Decoding Format: (MPEG1/2 Audio Layer 3) Max. Bit Rate 320 kbps WMA (Windows Media® Audio) Decoding Format Max. Bit Rate 320 kbps USB SECTION USB Standard USB 1.1, USB 2.0 Data Transfer Rate (Full Speed) Max. 12 Mbps Storage Less than 8 GB (1 partition type) Compatible Device Mass storage class (except HDD) Compatible File System FAT 32/16/12 Playable Audio Format MP3/WMA Max. Current 500 mA 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) Installation Size (approx.) 182 mm × 52 mm × 160 mm Panel Size (approx.) 188 mm × 58 mm × 13 mm Mass (approx.) 1.3 kg (excluding accessories)

Page 2

(No.MA377)1-3 KD-G447/KD-G357 Design and specifications are subject to change without notice.AUDIO AMPLIFIER SECTION Maximum Power Output Front/Rear 50 W per channel Continuous Power Output (RMS) Front/Rear 19 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) Tone Control Range Bass ±12 dB at 60 Hz Middle ±12 dB at 1 kHz Treble ±12 dB at 10 kHz Frequency Response 40 Hz to 20 000 Hz Signal to Noise Ratio 70 dB Other Terminals AUX (auxiliary) input jack, USB input jack TUNER SECTION Frequency Range FM1/FM2 87.5 MHz to 108.0 MHz FM3 65.00 MHz to 74.00 MHZ AM MW: 522 kHz to 1 620 kHz LW: 144 kHz to 279 kHz FM Tuner Usable Sensitivity 11.3 dBf (1.0 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 30 dB MW Tuner Sensitivity/Selectivity 20 µV/35 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 Dynamic Range 96 dB Signal-to-Noise Ratio 98 dB Wow and Flutter Less than measurable limit MP3 Decoding Format: (MPEG1/2 Audio Layer 3) Max. Bit Rate 320 kbps WMA (Windows Media® Audio) Decoding Format Max. Bit Rate 320 kbps USB SECTION USB Standard USB 1.1, USB 2.0 Data Transfer Rate (Full Speed) Max. 12 Mbps Storage Less than 8 GB (1 partition type) Compatible Device Mass storage class (except HDD) Compatible File System FAT 32/16/12 Playable Audio Format MP3/WMA Max. Current 500 mA 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) Installation Size (approx.) 182 mm × 52 mm × 160 mm Panel Size (approx.) 188 mm × 58 mm × 13 mm Mass (approx.) 1.3 kg (excluding accessories)

Page 23

1-24 (No.MA377)3.2.14 Removing the loading gear 1, loading gear 2, loading gear 3 and feed gear 1 (See Fig.22) - Remove the top cover, base board and chassis unit. (1) From the bottom side of the chassis unit, pull out the loading gear 1. (2) Take out the loading gear 2. (3) Pull out the loading gear 3. (4) Pull out the feed gear 1. 3.2.15 Removing the loading gear 4, loading gear 5 and loading gear 6 (See Fig.22) - Remove the top cover, base board and chassis unit. (1) From the bottom side of the chassis unit, remove the screw K attaching the loading gear bracket. (2) Take out the loading gear bracket and remove the loading gear 5 and loading gear 6 from the loading gear bracket. (3) Pull out the loading gear 4. 3.2.16 Removing the change gear 2, change gear 3A and change gear 3B (See Figs.22 and 23) - Remove the top cover, base board and chassis unit. (1) From the bottom side of the chassis unit, pull out the loading gear 1. (See Fig.22.) (2) Pull out the change gear 2. (See Fig.22.) (3) Pull out the change arm. (See Fig.22.) (4) Move the change gear plate rivet assembly in the direction of the arrow 2 to remove the section av of the change gear plate rivet assembly from the chassis unit while moving the change lock lever in the direction of the arrow 1. (See Fig.23.) (5) Pull out the change gear 3A and change gear 3B from the change gear plate rivet assembly. (See Fig.23.)Fig.22 Fig.23 3.2.17 Removing the cam plate L assembly (See Fig.24) - Remove the top cover, base board, chassis unit, clamper assembly, top plate assembly and loading roller assembly. (1) From the left side of the chassis unit, slide the cam plate L assembly in the direction of the arrow. (2) Remove the cam plate L assembly from the slots aw of the chassis unit. Fig.24 K Loading gear 4 Loading gear 1 Loading gear 2 Feed gear 1 Feed gear 2 Loading gear 3 Loading gear bracket Change arm Chassis unit Loading gear 6 Loading gear bracket Loading gear 5 2 1 Change gear plate rivet assembly Change gear 3A Change gear 3B Chassis unit Change lock lever av Change gear plate rivet assembly Change gear 3A Change gear 3B Chassis unit Cam plate L assembly awaw