JVC XV-NA7SL Service Manual Download Page 26 | Manualshive

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XV-NA7SL

27

SECTION 5

Description of major ICs

5.1 74LCX373MTC-X(IC512,IC513)

• Pin layout

• Pin function

• Truth table

H = HIGH Voltage level
L = LOW Voltage level
Z = High impedance
X = Immaterial
Q0 = Previous Q0 before HIGH to LOW transition of latch en-
able

Symbol

Description

D0~D7

Data inputs

LE

Latch enable input

OE

Output enable input

Q0~Q7

3-State latch outputs

INPUTS

OUTPUTS

LE

OE

Dn

Qn

X
H
H

L

H

L
L
L

X

L

H
X

Z

L

H

Q0

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Summary of Contents for XV-NA7SL

Page 1: ... 2002 10 XV NA7SL DVD AUDIO VIDEO PLAYER A0036 2002 09 XV NA7SL TABLE OF CONTENTS 1 Important Safety Precautions 3 2 Disassembly method 7 3 Mechanism 11 4 Adjustment method 18 5 Description of major ICs 27 6 Glossary of term and abbreviations for AV Decoder section 48 ...

Page 2: ...tal 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 pa...

Page 3: ...kup In order to maintain quality during transport and before installation both sides of the laser diode on the replacement optical pickup are shorted After replacement return the shorted parts to their original condition Refer to the text Do not use a tester to check the condition of the laser diode in the optical pickup The tester s internal power source can easily destroy the laser diode 1 6 Han...

Page 4: ...ety switches 5 CAUTION If safety switches malfunction the laser is able to function 6 CAUTION Use of controls adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure CAUTION Please use enough caution not to see the beam directly or touch it in case of anadjustment or operation check VARNING Osynlig laserstrålning är denna del är öppnasd...

Page 5: ...haracteristics of the optical block Do not change the setting of these half fixed resistors for laser power adjustment 1 8 2 Destruction of Traverse Unit and Laser Pickup by Static Electricity Laser diodes are easily destroyed by static electricity charged on clothing or the human body Before repairing peripheral elements of the traverse unit or pickup be sure to take the following electrostatic p...

Page 6: ... Fig 1 2 1 2 How to remove a front panel assembly See Figure 2 3 and 4 Please remove a top cover before removing a front panel as sembly Front panel assembly can be removed without removing mechanism assembly 1 Insert a kind of screwdriver in a hole located in the left side of mechanism assembly and push a lever until it cannot be inserted any further 2 And then a tray will come out Remove the tra...

Page 7: ...d 2 Extract card wire from connector CN902 and CN704 on a power supply board and servo control main board 3 Screw E attaches servo control main board to the main part Remove one screw E 4 Screw F attaches a mechanism assembly Remove three screws F 5 Remove two hook c s And then remove servo control main board with sliding it in a front direction 6 Two card wires are connected to servo control main...

Page 8: ...om socket P901 on a power supply board 4 Remove one screw G that attaches a power supply board and four screws D that attaches a power supply board from the rear side 2 1 6 How to remove a surround audio board See Figure 10 Please remove a top cover before removing a surround audio board 1 Extract card wire from connector CN704 on a servo control main board 2 Remove two screws J that attaches a su...

Page 9: ... screws H that attach an operation switch board and then operation switch board 3 Remove support button LCD display board and push but ton in this order When the main part is assembled parts must be assem bled in the following order Push button LCD display board Side LED board Support button Operation switch board After the operation switch board is attached to its place let a card wire through a ...

Page 10: ... on both sides ATTENTION When reattaching fit the clamper to the two joints a Fig 1 3 1 2 Removing the tray See Fig2 and 3 Note Prior to performing the following procedure remove the clamper assembly 1 Push b of the slide cam into the slot on the left side of the loading base until it stops 2 Draw out the tray toward the front ATTENTION Before reattaching the tray slide the part c of the slide cam...

Page 11: ...ism assem bly pass the card wire extending from the spindle motor board through the notch d of the elevator Fig 4 Fig 5 3 1 4 Removing the elevator See Fig 6 Note Prior to performing the following procedure remove the clamper assembly the tray and the traverse mechanism assembly 1 Extend each bar e inside of the loading base outward and detach the elevator shaft ATTENTION When reattaching first fi...

Page 12: ...re remove the clamper assembly the tray the traverse mechanism assem bly and the elevator 1 Remove the belt from the pulley 2 Remove the screw C attaching the motor assembly 3 Turn over the body and remove the screw D attaching the motor assembly 4 Release the two tabs g retaining the motor board Fig 7 Fig 8 ...

Page 13: ...chanism assembly the elevator and the motor assembly 1 Press the two tabs h inward and pull out idle gear 2 Remove the screw E attaching the pulley gear bracket Slide the pulley gear bracket in the direction of the arrow and pull out the pulley gear 3 Slide the side cam in the direction of the arrow to release the two joints i and remove upward 4 Remove the middle gear Fig 9 Fig 10 Fig 11 ...

Page 14: ...e following procedure remove the feed motor assembly 1 Remove the screw G attaching the thrust spring ATTENTION When reattaching the thrust spring make sure that the thrust spring presses the feed gear M and the feed gear E reasonably 2 Remove the feed gear M 3 Pull out the feed gear E and the lead screw 4 Remove the two screws H attaching the feed motor ATTENTION When reattaching pass the two cab...

Page 15: ... the arrow and detach from the spindle base 3 Disengage the joint n of the pickup and the shaft in the direction of the arrow 4 Pull out the shaft from the pickup 5 Remove the two screws J attaching the actuator 6 Disengage the joint of the actuator and the lead spring Pull out the lead spring Fig 15 The spring must be under the shaft when you install pick up Fig 16 Fig 17 3 2 4 Removing the shaft...

Page 16: ...the three screws L attaching the spindle motor on the bottom of the mechanism base ATTENTION When reattaching pass the card wire extending from the spindle motor board through the notch of the spindle base 2 Remove the three screws M attaching the spindle base Fig 19 Fig 20 Fig 21 ...

Page 17: ...in test mode 4 2 Initialization method Please initialize according to the following procedures when microprocessor or pick up is exchanged and when the up grade is done 1 Makes to test mode 2 PAUSE key of the main body is pushed 3 When the DVD AUDIO indicator lights blue it is initialization completion 4 3 Method of displaying version of microcomputer 1 Makes to test mode and initializes 2 When CH...

Page 18: ... the pick up more than the undermen tioned value Laser current value of CD 49 mA or less Laser current value of DVD 64 mA or less 4 5 Display of jitter value 1 Makes to test mode and initializes 2 When CHOICE key of remote controller is pushed four times It is displayed on the LCD display CHECK 3 The test disk VT 501 is inserted and the PLAY key to the main body is pushed 4 After a few seconds the...

Page 19: ...ocedure The tray opens automatically after a few seconds and exchange for the disc of STEP2 please The tray closes automatically There is only about five second time that the tray opens this time and replace the disc quickly between those please ATTENTION When the tray shuts with the STEP1 disc left for the tray The up grade starts again and exchange for the STEP2 disc please when the tray opens a...

Page 20: ...hes so that the jitter value displayed on the LCD display mey become maximum value ATTENTION As this value is bigger the jitter is more allowable in this model POINT 1 Turns in the forward or the opposite direction and makes to the position where the jitter value is good the half rotation of adjustment screw a and b 180 degrees respectively 2 Afterwards adjustment screw b and c are turned in the s...

Page 21: ...he pick up after solder is put up to two places on a flexible wire short land part a of the insertion of a flexible wire this time in the con nector without fail The procedure might be mistaken and if solder has not surely adhered to two places on a flexible wire short land part a the laser diode in the pick up be destroyed again 5 The pick up is installed in the traverse mechanism 6 A flexible wi...

Page 22: ...enness All Function button All function buttons should worked correctly with moderate click feeling Open and close movement of tray When press OPEN CLOSE button the tray should move smoothly without any noise Remote controller unit working Check the correctly operation in use of remote controller unit Reading of TOC Be not long in the malfunction Search Both forward searches and backward searches ...

Page 23: ...XV NA7SL 24 4 11Troubleshooting 4 11 1 Servo volume Fig 1 ...

Page 24: ...of the motor 4 12 2 Disc Detection Distinction error no disc no RFENV Laser is defective Front End Processor is defective IC101 APC circuit is defective Q101 Q102 Pattern is defective Lines for CN101 All patterns which relate to pick up and patterns between IC101 IC101 For signal from IC101 to IC301 is signal output from IC101 20 ASOUT and IC101 41 RFENV and IC101 22 FEOUT 4 12 3 Traverse movement...

Page 25: ...mal To 3 traverse movement NG in Check points for each error when it is not normal Are not there caught of the feeding mechanism etc 4 12 10 Picture is distorted or abnormal sound occurs at intervals of several seconds Is the feed operation normal Are not there caught of the feeding mechanism etc 4 12 11 Others The image is sometimes blocked and the image stops The image is blocked when going to o...

Page 26: ...table H HIGH Voltage level L LOW Voltage level Z High impedance X Immaterial Q0 Previous Q0 before HIGH to LOW transition of latch en able Symbol Description D0 D7 Data inputs LE Latch enable input OE Output enable input Q0 Q7 3 State latch outputs INPUTS OUTPUTS LE OE Dn Qn X H H L H L L L X L H X Z L H Q0 ...

Page 27: ...output of CH2 12 VO2 O Non inverted output of CH2 13 VO1 O Inverted output of CH1 14 VO1 O Non inverted output of CH1 15 VO4 O Non inverted output of CH4 16 VO4 O Inverted output of CH4 17 VO3 O Non inverted output of CH3 18 VO3 O Inverted output of CH3 19 PowVcc2 Vcc for CH3 4 power block 20 STBY2 I Input for Ch4 stand by control 21 GND Substrate ground 22 OPOUT3 O Output for CH3 OP AMP 23 OPIN3 ...

Page 28: ...erminal 5V 29 VHALF O VHALF voltage output terminal 30 DFLTON O Reversing output terminal of filter AMP 31 DFLTOP O Filter AMP output terminal 32 DCFLT I Capacity connection terminal for filter output 33 GND3 Connect to GND 34 RFDIFO Non connect 35 RFOUT Connect to TP103 36 VCC3 Power supply terminal 3 3V 37 RFC O Filter for RF delay correction AMP 38 DCRF O All addition amplifier capacitor termin...

Page 29: ...XV NA7SL 30 5 4 BA6664FM X IC251 3Phase Motor Driver Pin layout Block diagram ...

Page 30: ...13 H3 I Positive input for hall input AMP 3 14 H3 I Negative input for hall input AMP 3 15 VH I Hall bias terminal 16 BR Non connect 17 CNF Capacitor connection pin for phase compensation 18 SB I Short brake terminal 19 FG2 Non connect 20 FR Non connect 21 ECR I Torque control standard voltage input terminal 22 EC I Torque control voltage input terminal 23 PS O Start stop switch power save termina...

Page 31: ...nput CS Chip select input CKE Clock enable A0 A10 Address BA0 1 Bank select address RAS Row address strobe CAS Column address strobe WE Write enable DQM0 3 Data input output mask DQ0 31 Data input output VDD Power supply terminal VSS Connect to ground VDDQ Power supply terminal VSSQ Connect to ground NC Non connect ...

Page 32: ...ion interrupt output 24 CLP O RGB CMP switching signal output 25 AVCO O AV Compulink output terminal 26 AVCI I AV Compulink input terminal 27 BL O LCD Back lamp drive signal output 28 TCLOSE O Tray open signal output 29 TOPEN O Tray close signal output 30 LMMUTE O 4 ch driver MUTE signal output L MUTE 31 DISCSET I Disc catch status input H SET 32 DISCSTP I Disc stop status input H STOP 33 SWOPEN I...

Page 33: ...00mA Regulator Block diagram Pin function Pin No Symbol Function 1 Vout Output terminal 2 NC Non connect 3 GND Connect to ground 4 Cn Noise decrease terminal 5 Cout Control terminal 6 Sub Substrate Connect to ground 7 Vin Input terminal ...

Page 34: ... connect 48 WOBBLEF1L 49 HFMON O HFM Control output to Q103 50 TRVSW I Detection switch of traverse in side 51 SWUPDN Non connect 52 MECHA_H V Connect to ground 53 DISCSET I Mechanism state signal input 54 VDD Power supply 55 FEPEN O Serial enable signal for FEP 56 SLEEP O Standby signal for FEP 57 BUSY Non connect 58 REQ O Communication request 59 Connect to TP405 60 Non connect 61 VSS Ground 62 ...

Page 35: ...XV NA7SL 36 5 9 MN103S26EGA IC301 Super optical disc controller Terminal layout Block diagram ...

Page 36: ...ct 35 NWR I Writing system control 36 NRD I Read signal input from system controller 37 44 CPUDT7 0 I O System control data 45 CLKOUT1 Non connect 46 MMOD I Test mode switch signal 47 NRST I System reset 48 MSTPOL I Master terminal polarity switch input 49 SCLOCK Non connect 50 SDATA Non connect 51 OFTR I Off track signal input 52 BDO I Drop out signal input 53 56 PWM1 4 Non connect 57 VDD3 Power ...

Page 37: ...01 PLFLT1 I Connect to capacitor 1 for PLL 102 AVSS Connect to ground for analog circuit 103 RVI I Connect to resistor for VREF reference current source 104 VREFH I Reference voltage input 2 2V 105 PLPG Non connect 106 VHALF I Reference voltage input 1 65V 107 108 DSLF2 1 I Connect to capacitor 2 1 for DSL 109 AVDD Power supply terminal for analog circuit 3 3V 110 NARF I Equivalence RF 111 ARF I E...

Page 38: ...DD15 I O ATAPI host data 15 150 HDD0 I O ATAPI host data 0 151 HDD14 I O ATAPI host data 14 152 VDD18 Power supply terminal for I O 1 8V 153 PO I Connect to ground 154 UATASEL I Connect to ground 155 VSS Connect to ground 156 VDD3 Power supply terminal for I O 3 3V 157 HDD1 I O ATAPI host data 1 158 HDD13 I O ATAPI host data 13 159 HDD2 I O ATAPI host data 2 160 HDD12 I O ATAPI host data 12 161 HD...

Page 39: ...ontrol signal for DAC 10 M1 I Control signal for DAC 11 OUT1C O Analog output 1 12 AVDD1 Power supply terminal 13 OUT1D O Analog output 1 14 AVSS1 Connect to ground 15 AVSS2 Connect to ground 16 OUT2D O Analog output 2 17 AVDD2 Power supply terminal 18 OUT2C O Analog output 2 19 M9 I Control signal for DAC 20 DVSS1 Connect to ground 21 XOUT Non connect 22 XIN Non connect 23 VCOF I VCO Frequency 24...

Page 40: ...nal 3 3V 11 DQM1 O SDRAM Data byte enable 12 13 MA9 8 O SDRAM Address bus terminal 14 VSSio Connect to ground 15 16 MA7 6 O SDRAM Address bus terminal 17 VSS Connect to ground 18 MA5 O SDRAM Address bus terminal 19 VDDio Power supply terminal 3 3V 20 21 MA4 3 O SDRAM Address bus terminal 22 MCLK O SDRAM Clock output 23 VSSio Connect to ground 24 CKE O SDRAM Clock enable output 25 26 MA2 1 O SDRAM ...

Page 41: ... AOUT3 O Serial audio output data to audio DAC for left and right channels for down mix 72 AOUT2 O Serial audio output data to audio DAC for surround left and right channels 73 AOUT1 O Serial audio output data to audio DAC for center and LFE channels 74 AOUT0 O Serial audio output data to audio DAC for left and right channels 75 VDDio Power supply terminal 3 3V 76 PCMCLK O Audio DAC PCM sampling c...

Page 42: ...deo 113 VAA3 Cb output for component Blue output 114 Y G O Power supply terminal for DAC analog 3 3V 115 VSSA Video signal output Luminance for S Video and component Green output 116 VREF Connect to ground for DAC analog 117 VAA Non connect 118 CVBS C O Video signal output Composite video Chrominance output for S Video 119 RSET O Current setting resistor of output DACs 120 COMP O Compensation capa...

Page 43: ...al 3 3V 197 200 XI03 06 I O Programmable general purpose external input output 201 VSS Connect to ground 202 203 XI07 08 I O Programmable general purpose external input output 204 VSSio Connect to ground 205 XI09 I O Programmable general purpose external input output 206 209 XID10 13 I O Programmable general purpose external input output 210 VDDio Power supply terminal 3 3V 211 XID14 I O Programma...

Page 44: ...n layout Pin function Block diagram Pin No Symbol I O Description 1 PE Non connect 2 VCC Power supply terminal 3 CS I Chip select input 4 SK I Serial clock input 5 DI I Serial data input 6 DO O Serial data output 7 GND Connect to ground 8 NC Non connect ...

Page 45: ...s lines will select the block DQ15 DQ0 Data Input Output To output data during read cycles and receive input data during write cycles Data is internally latched during a write cycle The outputs are in tri state when OE or CE is high CE Chip Enable To activate the device when CE is low OE Output Enable To gate the data output buffers WE Write Enable To control the write operations VCC Power Supply ...

Page 46: ...n No Symbol Description Function 1 D Drain terminal MOS FET drain 2 S Source terminal MOS FET source 3 GND Ground terminal Ground 4 Vin Power supply terminal Input of power supply for control circuit 5 O C P F B Over current Feedback terminal Input of over current detection signal and constant voltage control signal A B Y L L L L H L H L L H H H ...

Page 47: ... Input Output IEC International Electrotechnical Commission IOM Current I Output Minus complementary shared current path to Video DAC current paths IR infrared ITU International Telecommunications Union LA Latched Address Bus LCLK oscillator clock derived from internal crystal oscillator Lfe Low frequency effect LRCLK Left Right clock LSB Least Significant Bit Mb Megabit MB Megabyte MCLK primary o...

Page 48: ...ic Random Access Memory SSP Synchronous Serial Port TXD transmit signal UART Universal Asynchronous Receiver transmitter USART Universal Synchronous Asynchronous Receiver Transmitter VGA Video Graphics Array VIO Video Input Output VREF Voltage REFerence Vref Vertical reference VSSA quiet analog ground VSYNC Vertical sync XBUS External peripheral bus XIO External Input Output Y Luminance component ...

Page 49: ... No A0036 XV NA7SL PERSONAL MOBILE NETWORK BUSINESS UNIT 1644 Shimotsuruma Yamato Kanagawa 242 8514 Japan VICTOR COMPANY OF JAPAN LIMITED 2002 10 Printed in Japan ...

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