Related Manuals for JVC KD-R491
Summary of Contents for JVC KD-R491
- Page 1 SCHEMATIC DIAGRAMS CD RECEIVER KD-R491 KD-R491M KD-R496 KD-R498 KD-R691 (No.MA665<Rev.001>)1/19...
- Page 2 ■ PRECAUTIONS ON SCHEMATIC DIAGRAMS Due to the improvement in performance, some part numbers shown in the circuit diagrams may not agree with those indicated in the Parts List. The parts numbers, values and rated voltage etc. in the Schematic Diagrams are for reference only.
- Page 3 BLOCK DIAGRAM (1/2) (SUPPLY BLOCK) J471 DC P.CORD IC301 J321 MEM14.4V POWER AMP J601 CN901 VCC1 VCC2 (21) Jack IC161 E-VOL IC470 IC471 Mute Circuit DIMMER TEL MUTE (24) (13) 3.3V IC601 TU3.3V 0.45mA TUNER VDDD VDDA_IFADC VDDA_RF AU8.5V 0.25mA VCC 1 SW_3.3V CD7V...
- Page 4 BLOCK DIAGRAM (2/2) (SIGNAL BLOCK) CN901 J471 J321 IC301 J601 DC P.CORD POWER AMP SXM_RxD SXI_L PWIC_MUTE SXM_TxD Jack SXI_R FL OUT PWIC_STB SXM_PWR IC470 IC471 SXI_G BEEP RL OUT/SWL Level Shiftor FR OUT RR OUT/SWR SW (Mono) REMOTE FLAG TU_L IC601 _REG...
- Page 5 MAIN PWB ASSY(1/2) (XJ1-217x-0x) Note : The Parts Number, value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts, refer to the Parts List. *J470 J600 QNZ0907-001 TL98 (SL) QNB0356-001 TL188 TL189 TL100 (SR) IC301 TL99...
- Page 6 MAIN PWB ASSY(2/2) (XJ1-217x-0x) Note : The Parts Number, value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts, refer to the Parts List. Parts are safety assurance parts. When replacing those parts make sure to use the specified one.
- Page 7 SWITCH PWB ASSY (XJ6-115x-0x) Note : The Parts Number, value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts, refer to the Parts List. SWITCH PWB : J7K-0320-** *IC90 SIRD630B6T QNS0320-001 R1006 1000p 1/10W 1000p *Q90...
- Page 8 CD MECHA PWB ASSY (LVA20106-01A) Note : The Parts Number, value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts, refer to the Parts List. To MAIN PWB ASSY(2/2) (XJ1-217x-0x) CN502 1/4W 1/4W OPEN QGF1044F2-24X 0.1u...
- Page 9 CD MECHA PWB ASSY (XJD-0010-00) Note : The Parts Number, value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts, refer to the Parts List. To MAIN PWB ASSY(2/2) (XJ1-217x-0x) CN502 1/4W 1/4W ?C57 EC720AE-1024B 0.1u...
- Page 10 MAIN PWB ASSY XJ1-217x-0x (J7K-0335-00) (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)) How to repair a fuse pattern. Refer to "2.1 How to repair a fuse pattern".
- Page 11 MAIN PWB ASSY XJ1-217x-0x (J7K-0335-00) (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)) How to repair a fuse pattern. Refer to "2.1 How to repair a fuse pattern".
- Page 12 SWITCH PWB ASSY(1/2) XJ6-115x-0x (J7K-0320-00) (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)) IC90 No.MA665 created date:2017-09-25 (No.MA665<Rev.001>)12/19...
- Page 13 SWITCH PWB ASSY(1/2) XJ6-115x-0x (J7K-0320-00) (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)) XJ6-115 XJ6-101 RA51 FL80 RA52 J7K-0320-00 ULMARK No.MA665...
- Page 14 SWITCH PWB ASSY(2/2) XJ6-115x-0x (J7K-0320-00) (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)) No.MA665 created date:2017-09-25 (No.MA665<Rev.001>)14/19...
- Page 15 SWITCH PWB ASSY(2/2) XJ6-115x-0x (J7K-0320-00) (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)) J7K032000 XJ6115 No.MA665 created date:2017-09-25 (No.MA665<Rev.001>)15/19...
- Page 16 CD MECHA PWB ASSY LVA20106-01A (LVB20106-001B) (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)) LVB20106-001B LVA20106- PRTOUT D-CNT DGND LOS SW 12EJE SW...
- Page 17 CD MECHA PWB ASSY LVA20106-01A (LVB20106-001B) (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)) No.MA665 created date:2017-09-25 (No.MA665<Rev.001>)17/19...
- Page 18 CD MECHA PWB ASSY XJD-0010-00 (J7J-0050-00) (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)) PRTOUT D-CNT XJD-0010-00 XKD-0020-00 J7J-0050-00 DGND LOS SW...
- Page 19 CD MECHA PWB ASSY XJD-0010-00 (J7J-0050-00) (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)) No.MA665 created date:2017-09-25 (No.MA665<Rev.001>)19/19...
- Page 20 Hook Remote ctl (IR) (GE40685-001A) x2 (A7A-0018-00) COPYRIGHT © 2017 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) No.MA665<Rev.001>...
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Page 21: Specification
SPECIFICATION Models for destination "E" (KD-R491, KD-R691) TUNER Frequency Range FM: 87.5 MHz to 108.0 MHz (50 kHz step) 0.71 V/75 (8.2 dBf) Usable Sensitivity (S/N = 26 dB) 2.0 V/75 Quieting Sensitivity(DIN S/N = 46 dB) Frequency Response (±3 dB) - Page 22 SPECIFICATION Models for destination "M" (KD-R491, KD-R491M, KD-R496, KD-R498) TUNER (Only for KD-R491, KD-R496, KD-R498) Frequency Range 87.5 MHz to 108.0 MHz (50 kHz step) 8.2 dBf (0.71 V/75 ) Usable Sensitivity (S/N = 26 dB) Quieting Sensitivity(DIN S/N = 46 dB) 17.2 dBf (2.0 V/75 ) Frequency Response (±3 dB)
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Page 23: Section 1 Precaution
SECTION 1 PRECAUTION Safety Precautions (1) This design of this product contains special hardware and Critical parts for safety many circuits and components specially for safety purpos- In regard with component parts appearing on the silk-screen es. For continued protection, no changes should be made printed side (parts side) of the PWB diagrams, the parts that are to the original design unless authorized in writing by the printed over with black such as the resistor (... -
Page 24: Important For Laser Products
Handling the traverse unit (optical pickup) Attention when traverse unit is decomposed (1) Do not subject the traverse unit (optical pickup) to strong *Please refer to "Disassembly method" in the text for the shocks, as it is a sensitive, complex unit. pickup unit. -
Page 25: Section 2 Specific Service Instructions
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS How to repair a fuse pattern Components description 2.1.1 Purpose of fuse pattern 2.2.1 MAIN PWB In order to prevent serious damage on the circuit, fuse pattern is Ref. No. Application / Function Operation / Condition / Compatibility prepared on the GND line of RCA Terminal. - Page 26 Microcomputer’s terminal description IC701 (R5S726A0D216FP) on MAIN PWB ASSY Processing/Operation/Descrip- Pin No. Pin Name Application tion LCD_INH Display On/Off Control L: Display OFF / H: Display ON DAB_COM_ON Enable DAB micon (For DAB model) H: ON / L: OFF No Use (for non DAB model) PVcc Power supply for I/O circuits NRST...
- Page 27 Model Selecting Input 1 Refer to respective spec STEERING_REMO1 OE Remote In 1 (for DOP models) TEL_MUTE Tel Mute Detection Input (for JVC Model) Refer to respective spec LINE_MUTE Line Mute Detection Input (For KWD Model) Refer to respective spec...
- Page 28 I2C Data for Regulator IC CD_DSP_SW CD DSP Switch L: Other sources / H: CD USB SD source DIM_IN Dimmer Control Input (for JVC Model) L: Dimmer Detect ON / H: Dimmer Detect OFF No Use (For KWD Model) keep L output setting REG_FLG...
- Page 29 Processing/Operation/Descrip- Pin No. Pin Name Application tion Power supply MDATA Microcontroller Command Data Signal TU_RST HELIO/CAYMAN (HD) Reset L: Reset ON / H: Reset OFF No Use (For non DAB/HD model) PVcc Power supply for I/O circuits SXM_PWR Power Supply for SXM (For SXM model only) L: PWR Off / H: PWR On No Use (for non SXM model) DRV_CNT...
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Page 30: Section 3 Disassembly
SECTION 3 DISASSEMBLY Main body (5) Remove the 2 screws (a), and remove the MAIN PWB. (See Fig.3) 3.1.1 Removing the MAIN PWB (See Fig.1 to 3) (6) Remove the 3 screws (b,c), and remove the HEAT SINK. (1) Disengage the 6 hooks, and remove the SUB PANEL (See Fig.3) ASS’Y. - Page 31 3.1.3 Removing the SWITCH PWB (See Fig.5) CD mechanism (1) Remove the 3 screws. • NOTICE FOR HANDRIG OF MECHANISM ASSY (2) Disengage the 15 hooks, and remove the REAR COVER. (3) Remove the SWITCH PWB. Handle CHASSIS part. SWITCH PWB Do not stay MECHANISM ASSY in upside-down condition for 1 hour and more.
- Page 32 • NOTICE FOR HANDRIG OF FEED MOTR ASSY 3.2.1 Removing the CD MECHA PWB (See Fig.1 to 3) (1) Solder the short land on the PICKUP. (See Fig.1) CAUTION: For mounting FEEDMOTOR ASSY, DON'T bump this part. Because handling may cause this part easily deformed. SOLDER FEED MOTOR WORM 1...
- Page 33 3.2.2 Removing the TRAVERSE MECHANISM (See Fig.4, 5) 3.2.3 Removing the PICKUP ASSY (See Fig.6) (1) Remove the 4 springs from the TRAVERSE MECHANISM. (1) Remove the 1 screw C. (See Fig.4) (2) Remove the MAIN SHAFT in the direction of the arrow. (3) Remove the SPRING.
- Page 34 3.2.5 Removing the CLAMP ARM ASSY (See Fig.8) (1) Remove the SPRING. (2) Remove the CLAMP ARM ASSY in the direction of the ar- row. CLAMP ARM ASSY SPRING Fig.8 3.2.6 Removing the FEED MOTOR (See Fig.9, 10) (1) Remove the 5 screws D, and remove the FEED MOTOR ASSY.
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Page 35: Section 4 Adjustment
SECTION 4 ADJUSTMENT Outline 4.1.1 Panel ACCENT EJECT DISP / MENU SEARCH / RETURN 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. - Page 36 Production Test Mode In during power off, pressing and holding [1] key and [3] key, then power on the +B power supply. 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. Difference in action Setting value Period to prohibit TEL/LINE MUTE function (Normal Mode: 10 secs)
- Page 37 4.2.2 Mode structure The following table shows the test modes that can be accessed from the different sources in Production Test Mode. Source Test mode Tuner TUNER Test Mode USB Test Mode *These mode are able to transit to Version Display Mode at all sources by pressing [RETURN] key until all LCD lights up. 4.2.3 Mode content Syscon shall display the following information after entering Production Test Mode.
- Page 38 4.2.7 Tuner Test Mode Specification The following display shall be indicated according to the TUNER status. Status Display content Details TUNER IC Communication to TUNER IC not available Communication Error (indicated unless the mode is in Clock Display Mode). RDS Specified Turn OFF P-CON forcibly if PS=RDS TEST is received.
- Page 39 Service Test Mode Pressing and holding [DISP] key, then press [] key for 7 seconds. (Starting to press [DISP] key and [] 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.
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Page 40: Display Content
4.3.4 CD Error Information Display Mode Item Operation Display content Details CD error Transit to CD error information display mode. information ACCENT display mode CD Mecha error Mecha error history 1,2,3 (latest) log display #:History No. (1,2,3) XX: kind of errors, "--" when there is none 00: No Error 04: TOC read Error 05: Unknown CD... - Page 41 Service Information Clear Mode In during power off, pressing and holding [RETURN] key and [ SRC] key, then power on the +B power supply. 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.
- Page 42 DC Error Information Mode In during power off, pressing and holding [DISP] key and [] key, then power on the +B power supply. 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.
- Page 43 Chevrolet 4 Green Peugeot 5 6 Orange Nissan DAB* Isuzu Yellowish Green Skoda User (R=22, G=31, B=0) Yellow Amber Daihatsu DISP (Same as Suzuki) Return to default JVC normal setting. Default RETURN *: Only for DAB model (No.MA665<Rev.001>)24/33...
- Page 44 HC Mecha Running Mode In during power off, pressing and holding [ SRC] key and [EJECT] key, then power on the +B power supply. The software specification for evaluating HC Mecha is described. This mode is set for the general operation test and the endurance running test. 4.7.1 Mode Display Specification for Evaluation Display content Operation...
- Page 45 4.7.2 ERROR CODE for MODEL with FLM-HCI MECHA (Ver1.1) DISPLAY SIGN ERROR Item Condition Details In LOAD operating. Anomaly detection of SW state at LOADING. LI-E LOADING TIME OVER Or 5 sec TIME OVER from LOAD start. In EJECT operating. Anomaly detection of SW state at EJECT.
- Page 46 DC Offset error description 4.9.5 Manipulate after detect DC Offset • If detected error 10 consecutive times, and 10th error occurred 4.9.1 DC Offset detection circuit design in "Mis-connect detection period", judge as "Mis-connect". • Purpose: • If detected error 10 consecutive times, and 10th error occurred To prevent breakdown, when occur DC offset between speak- in "Capacitor leak detection period", judge as "Capacitor leak ".
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Page 47: Section 5 Troubleshooting
SECTION 5 TROUBLESHOOTING Power sequence : IC701 Micon control Dotted Line: Standby Circuit IC301 Main 300mA 150mA *No Signal Power Amp External 500mA 90mA *typ Measured value Marine Remote Flag (ON=3.3V, OFF=0V) VCC2 uCON (Pin99) R900~R903 SDA/SCL ACC_DET uCON (Pin95,Pin96) SDA/SCL DC CORD VCC1... -
Page 48: Fault Diagnosis
Fault diagnosis No Power 10A Fuse Replace New 10A Fuse IC901 IC901 Pin 7 & 8 supply must keep above 7.5V, (BU_DET) Check D903, D902, C919 & C918. IC901 Check pattern and component between (ACC_DET) CN990 Pin13 to IC901 Pin6. D861/ R1080 Replace Component Open? - Page 49 DEVICE" 2. Wire connection problem. • Restart the Android device. 13 "CANNOT PLAY " 1. JVC Music Play is forced stop. • Make sure Android device contains 2. No music file in auto mode. playable audio files. • Reconnect the Android device.
- Page 50 Methods to recover / Clear the mes- Error Message Information Category sage 16 "UNRESPONSIVE DEVICE" HU is unable to establish a communica- Make sure the device is not malfunction tion with the USB device. and reattach the device. 17 "CANNOT PLAY" 18 "NOT SUPPORT"...
- Page 51 Methods to recover / Clear the mes- Error Message Information Category sage 36 "DAB1 ERROR PLEASE DAB module update failed. Perform DAB module firmware update. UPDATE" 37 "DAB2 ERROR PLEASE DAB micon update failed. Perform DAB micon firmware update. UPDATE" 38 "LOGIN ERROR"...
- Page 52 JVC KENWOOD Corporation Automotive 2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525, Japan (No.MA665<Rev.001>) Printed in Japan...