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JVC TH-V70R Service Manual

JVC TH-V70R Manual Online:

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JVC TH-V70R User Manual
JVC TH-V70R User Guide
JVC TH-V70R Online Manual

Text of JVC TH-V70R User Guide:

  • TH-V70R (No.21175)1-51 4.26 MN102L62GLF3 (IC401) : Unit CPU •Pin layout • Pin function 1 25 75 51 100 76 26 50 Pin No. Symbol I/O Function 1 WAIT I Micro computer wait signal input 2 RE O Read enable 3 /SPMUTE O Spindle muting output to IC251 4 WEN O Write enable 5 /LMMUTE - Not connect 6 CS1 O Chip select for ODC 7 CS2 - Chip select for ZIVA (N

  • JVC TH-V70R, TH-V70R 1-52 (No.21175) 4.27 NDV8601VWA-BE (IC501) : DVD on a chip processor • Pin layout • Block diagram • Pin function 1 60 180 121 240 181 61 120 Pin No. Symbol Description 1 VDDio - Power supply terminal 3.3V 2,3 MD10,11 I/O SDRAM Data bus terminal 4 VDD - Power supply terminal 1.8V 5 MD12 I/O SDRAM Data bus terminal 6 VSSio - Connect to ground 7~9 MD13~15 I/O SDRAM Data bus terminal 10 VDDio - Power supply terminal 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 grou

  • JVC TH-V70R, TH-V70R 1-2 (No.21175) SECTION 1 Important Safety Precautions 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 man- ufacturer. Replacement parts must be identical to those used in the original circuits. Services should be per- formed by qualified personnel only. (2) Alterations of the design or circuitry of the

  • JVC TH-V70R, TH-V70R 1-26 (No.21175) SECTION 4 Description of major ICs 4.1 74LCX32MTC-X (IC522) : Quad 2 input OR gate • Pin layout & Block diagram • Truth table 4.2 74LCX373MTC-X (IC512,IC513) : Octal D-type latch • Pin layout • Truth table X: Don't care Z: High impedance Qn: Q outputs are latched at the time when the LE input is tak- en to a low logic level. • Block diagram 11A 21B 31Y 42A 52B 62Y 7 14 13 12 11 10 9 8GND V CC 4B 4A 4Y 3B 3A 3Y (TOP VIEW) INPUTS OUTPUT ABY LLL LHH HLH HHH 1OE 2Q0 3D0 4D1 5Q1 6Q2 7 20 19 18 17 16 15 14D2 VCC Q7 D7 D6 Q6 Q5 D5 (TOP VIEW) 8D3 9Q3 10GND 13 12 11 D4 Q4 LE INPUTS OUTPUT OE LE D Y HXXZ LLXQn LHLL LHHH Q L D D0 3 2 Q0 11 1 LE OE Q L D

  • TH-V70R 1-66 (No.21175) 4.40 TA8409S (IC108) : Motor driver • Pin layout • Pin function • Pin function 4.41 TC74HC00AF(IC408):Digital I/O selector • Pin layout & block diagram 1 2 3 4 5 6 7 8 9 IN2 VCC OUT 2 GND GND VS OUT 1 VR IN1 INPUT OUTPUT MODE IN1 IN2 OUT 1 OUT 2 MOTOR 0 0 Infinity Infinity STOP 1 0 H L CW/CCW 0 1 L H CCW/CW 11L L BRAKE Pin No. Symbo

  • JVC TH-V70R, TH-V70R (No.21175)1-15 2.3.7 Removing the spindle motor board (See Figs. 10 and 11.) • Remove the DVD servo board. • Remove the DVD traverse mechanism assembly. (1) From the top side of the DVD traverse mechanism assem- bly, remove the feed motor wire that is soldered to the spin- dle motor board. (2) From the back side of the DVD traverse mechanism as- sembly, remove the three screws F attaching the spindle motor board. Fig.10 Fig.11 Spindle motor board Feed moto r wire Feed motor Remove the solders. F F Spindle moto r board

  • JVC TH-V70R, TH-V70R (No.21175)1-39 28 DQM2 Makes data output Hi-Z, tSHZ after the clock and masks the output. Blocks data input when DQM active. 29 VDD Power for the input buffers and core logic. 30 N.C This pin is recommended to be left no connection on the device. 31 DQ16 Data input/output are multiplexed on the same pin. 32 VSSQ Isolated ground for the output buffers to provide improved noise immunity. 33,34 DQ17,DQ18 Data inputs/outputs are multiplexed on the same pins. 35 VDDQ Isolated power supply for the output buffers to provide improved noise immunity. 36,37 DQ19,DQ20 Data inputs/outputs are multiplexed on the same

  • JVC TH-V70R, TH-V70R (No.21175)1-19 2.4.3 Removing the pre-amplifier board (See Figs. 4 to 6.) • Remove the rear panel. (1) Remove the two screws F attaching the volume bracket. (2) Disconnect the pre-amplifier board from the connector CN201 on the mother board and take out the pre-amplifier board. (3) Pull out the push button. (4) Remove the two screws G and nut attaching the volume bracket. 2.4.4 Removing the power supply & SP terminal board (See Figs. 4 and 5.) • Remove the rear panel. (1) Remove the two screws H attach

  • JVC TH-V70R, TH-V70R 1-34 (No.21175) 4.11 BA6664FM-X (IC251) : Motor driver • Pin layout • Block diagram NC A3 NC A2 NC NC A1 GND H1+ H1- H2+ H2- H3+ H3- RNF VM GSW Vcc FG PS EC ECR FR FG2 SB CNF BR VH- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 29 30 28 27 26 25 24 23 22 21 20 19 18 17 16 15 BRAKE MODE Hall Bias SHORT BRAKE VH BR CNF SB FG2 FR VCC VCC R D Q CK Q ECR EC PS FG VCC VCC GSW VM R NF GAIN SWITCH 2 4 7 8 9 10 11 12 13 14 H1+ H1- H2+ H2- H3+ H3- + - + - + - + - + - + - TSD PS TOROUE SENSE AMP GAIN CONTROL + - + - DRIVER HALL AMP TL A3 A2 A1 GND CURRENT SENSE AMP

  • JVC TH-V70R, TH-V70R 1-64 (No.21175) 4.37 STK402-230 (IC107) : Power amplifier • Terminal layout • Block daiagram 4.38 STK404-130 (IC105) : Power amplifier • Pin layout • Block diagram STK402-230 119 SUB R2 TR3 TR1 R1 TR4 C1 R3 TR2 R4 D1 R5 TR5 TR6 R7 TR8 TR7 R6 TR9 TR10 R8 TR11 TR13 R12 TR12 R11 C2 TR14 R13 R20 TR15 TR16 R14 TR23 TR21 C3 R15 TR17 TR18 TR19 R17 TR20 R16R21 TR24 TR22 R18 R19 R9 R10 4 1 2 8 +Vc c 12 5 9 7 6 10 14 15 16 17 19 1811 CH1–VE CH1+VE CH2+VE CH2NF CH2IN CH3IN CH3NF CH3–VE CH3+VE CH2–VE 13 PRE+Vcc CH1IN CH1NF PRE–Vcc BIAS –Vcc GND 113 1 2 3 4 5 SUB 6 7 8 9 10 11 12 13 PT1 IN1 NF GND BIAS +12V PRE -Vcc NC -V

  • JVC TH-V70R, TH-V70R 1-42 (No.21175) 4.18 LM1117MP1.8-X (IC511) : Regulator • Pin layout • Block diagram 4.19 LP61L1024S-12-X (IC404) : SRAM • Pin layout • Block diagram • Pin function Top view A DJ/GND OUTPUT INPUT GND (FIXED OUTPUT) ADJ.(ADJUSTABLE OUTPUT) V OUT V IN Thermal Limit Current Limit Substrate NC A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 I/O1 I/O2 I/O3 Vss 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 V DD A15 CS2 WE A13 A8 A9 A11 OE A10 CS1 I/O8 I/O7 I/O6 I/O5 I/O4 SYMBOL DESCRIPTION A0 - A16 A

  • JVC TH-V70R, TH-V70R (No.21175)1-47 46 VOL-STB O VOLUME serial communication strobe 47 VOL-CLK O VOLUME serial communication clock 48 SW2 I Slide door switch2 49 INT/PROG O D terminal LINE2 switching 50 REMO-CTL O Remote controller switching control 51 ~ 55 NC - Ground 56 MT1 O Slide door motor control 0 57 MT1 O Slide door motor control 1 58 MTS O Slide door motor speed control 59 INH I AC switching detection 60 GND - Ground 61 HP I Headphone input detection 62 SYS P.ON O System power supply control 63 GND - Ground 64 DVD P.ON O DVD power supply control 65 TUNER P.ON O TUNER power supply control 66 GND - Ground 67 RDS DATA O RDS communication data 68 RDS CLK O RDS communica

  • JVC TH-V70R, TH-V70R 1-22 (No.21175) 2.4.8 Removing the power transformer (See Figs. 12 and 13.) • Remove the rear panel. (1) Remove the wire from the connector CN104 on the mother board. (2) Disconnect the wire from the connector CN107 on the pow- er supply & SP terminal board. (3) Remove the four screws P attaching the power transformer and then remove the power transformer from the trans- former bracket of the mold base. Fig.12 Fig.13 Power transformer CN104 Mother board Power supply & SP terminal board PP P Transforme r bracket Mold base Power supply & SP terminal board CN107

  • JVC TH-V70R, TH-V70R (No.21175)1-69 45 MIDIO IN I/O Interface I/O terminal with microcomputer 46 MIDIO OUT I/O Interface I/O terminal with microcomputer 47 MICK O Interface I/O terminal with microcomputer of clock signal 48 MICS O Interface I/O terminal with microcomputer of chip select 49 MILP O Interface I/O terminal with microcomputer 50 MIACK O Interface I/O terminal with microcomputer 51 - Non connect 52 - Non connect 53 DSPRST O Reset signal output of DSP 54~63 - Non connect 64 CODEC OUT I/O Interface I/O terminal with microcomputer 65 CODEC IN I/O Interface I/O terminal with microcomputer 66 CODEC CLK O Interface I/O terminal with

  • JVC TH-V70R, TH-V70R (No.21175)1-11 2.2.4 Removing the front board (See Figs. 17 to 20.) (1) While widening section e of the front base in the direction of the arrow, remove the rod gear assembly. (2) Slide the moving panel assembly all the way in the direction of the arrow. (3) While slightly widening sections f toward the front, take out the moving panel assembly in the direction of the arrow. (4) Remove the two screws U attaching the moving base of the moving panel assembly. (5) Disengage the engagement sections g on the inside of the moving base and at the inside of the moving panel assem- bly and remove the moving base. (6) Remove the two screws V attaching the fron

  • TH-V70R 1-20 (No.21175) 2.4.5 Removing the mother board (See Figs. 7 and 8.) • Remove the rear panel. • Remove the pre-amplifier board. • Remove the power supply & SP terminal board. (1) Disconnect the wire from the connector CN104 on the mother board. (2) Remove the seven screws J attaching the mother board. (3) Take out the mother board with the power amplifier board (A,B). (4)

  • TH-V70R (No.21175)1-31 4.6 BA15218F-XE (IC510,IC511,IC531,IC561,IC581,IC591) : Dual operational amplifier •Pin layout • Block diagram 4.7 BA15218N (IC103,IC104,IC108,IC109,IC110,IC201,IC202) : Dual Ope. Amp. • Pin layout / Block diaglam 1 2 8 Vcc 7 OUT2 6 -IN2 5 +IN2 OUT1 1 -IN1 2 +IN1 3 VEE 4 Q19 Q17Q16 OTHER CH R9 R6 R8 R7 R5 R4 R3R2 R1 D1 C1 Q18Q1

  • JVC TH-V70R, TH-V70R (No.21175)1-5 1.9 Important for laser products (1) CLASS 1 LASER PRODUCT (2) DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. (3) CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. (4) CAUTION : The compact disc player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks ha

  • JVC TH-V70R, TH-V70R (No.21175)1-25 SECTION 3 Adjustment method 3.1 Initializing in TEST MODE YES NO Initializing in TEST MODE Moving panel close? Press the power button on the main unit, and put it in standby. While pressing both the STOP button (fourth button from left) and EJECT (farthest right button) button on the main unit, plug in the power. FL indication TEST E Monitor indication (Upper left of the monitor) E(Europe) Pressing the PAUSE button (fifth button from right) Initialization starts FL indication "ATT" will appear Initialization is complete. Set the power to standby. Make sure that the panel

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