Aiwa NSX-MT920 Service Manual
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Aiwa NSX-MT920 Service Manual

Aiwa NSX-MT920 Service Manual

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anua
COMPACT
DISC
STEREO
CASSETTE
RECEIVER
an.ua
SERVICE
NSX-MT920
SYSTEM
CD
SPEAKER
REMOTE
CASSEIVER
CONTROLLER
SX-NA902
NSX-MT920
CX-NMT920
SX-R275
RC-7AS09
SX-C605
. If requiring
information
about
the
CD
mechanism,
see
Service
Manual
of
4ZG-1,
S/M
Code
No,
09-983
-249 -30T.

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  • Page 43 4ZG-1 CD MECHANISM • • TYPE English BASIC CD MECHANISM 3ZG-2 E1 BASIC NAME DERIVATION NAME 4ZG-1 This Service Manual has various derivation.Derivation name is indicated by the Service Manual for each model. S/M Code No 09-985-249-80T...

  • Page 44: Protection Of Eyes From Laser Beam During Servicing

    PROTECTION OF EYES FROM LASER BEAM DURING SERVICING This set employs laser. Therefore, be sure to follow carefully the CAUTION instructions below when servicing. Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous WARNING! radiation exposure.
  • Page 45 This is the SERVICE MANUAL for the BASIC CD MECHANISM of BASIC NAME: 4ZG-1. This BASIC NAME includes the following models as shown under the SUFFIX name: DERIVATION NAME. Please use this manual with the separate SERVICE MANUAL for DERIVATION NAME. BASIC CD MECHANISM: 4ZG-1 VOS1DSH...
  • Page 46 How to Adjust the Rotating Phase of the Gear, Main Cam 1) Push down the hooking catch of the CHAS. MECH, and remove the TRAY. 2) Align the arrow mark of the Gear, Main Cam with the black round mark of the CHAS, MECHA as shown below. 3) Confirm that the Slide, Mech Cam is located in the right position, then insert the TRAY gently.

  • Page 47: Electrical Main Parts List

    ELECTRICAL MAIN PARTS LIST REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION C135 87-010-196-080 CHIP CAPACITOR,0.1-25 C136 87-010-196-080 CHIP CAPACITOR,0.1-25 87-A20-547-010 C-IC,CXA1992AR C137 87-010-196-080 CHIP CAPACITOR,0.1-25 87-A20-919-040 C-IC,BA5915FP C138 87-010-182-080 C-CAP,S 2200P-50 B 87-A20-917-010 C-IC,CXD2540Q-1/2 C139 87-010-197-080 CAP, CHIP 0.01 DM 84-ZG1-697-010...
  • Page 48 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION C527 87-010-197-080 CAP, CHIP 0.01 DM L506 87-005-204-080 COIL,47UH C528 87-010-197-080 CAP, CHIP 0.01 DM L507 87-005-204-080 COIL,47UH C529 87-010-197-080 CAP, CHIP 0.01 DM L508 87-005-817-080 C-COIL, 33UH J FLC32 C530 87-010-197-080 CAP, CHIP 0.01 DM...

  • Page 49: Chip Resistor Part Code

    • Regarding connectors, they are not stocked as they are not the initial order items. The connectors are available after they are supplied from connector manufacturers upon the order is received. / CHIP RESISTOR PART CODE Chip Resistor Part Coding Figure Resistor Code Value of resistor...
  • Page 50 BLOCK DIAGRAM...
  • Page 51 WIRING-1...
  • Page 52 WIRING-2...
  • Page 53 WIRING-3...

  • Page 54: Schematic Diagram

    SCHEMATIC DIAGRAM-1...
  • Page 55 SCHEMATIC DIAGRAM-2 C560 0.01...
  • Page 56 WAVE FORM IC101 Pin (RF-O) VOLT/DIV: 200mV IC504 Pin UCAS VOLT/DIV: 1V TIME/DIV: 0.5µS (Pin LCAS) TIME/DIV: 2µS 1.2±0.1Vp-p EYE PATTERN must be CLEAR and MAX IC501 Pin DA XCK VOLT/DIV: 1V 16.93MHz TIME/DIV: 20nS IC501 Pin VSync VOLT/DIV: 1V NTSC TIME/DIV: 5mS IC501 Pin...

  • Page 57: Ic Description

    IC DESCRIPTION IC, CXA1992AR Pin No. Pin Name Description Output terminal for focus error amplifier. Internally connected to window comparator input for bias condition. Input terminal for focus error. FDFCT Capacitor connection terminal for time constant used when there is defect. This pin is connected to GND via capacitor when high frequency gain of the focus servo is attenuated.
  • Page 58 Pin No. Pin Name Description RF_I Input terminal by capacity combination of RF summing amplifier. RF_O Output terminal of RF summing amplifier. Checkpoint of Eye pattern. Anti-reverse input terminal for RF summing amplifier. RF_M The gain of RF amplifier is decided by the connection resistance between RF_M and RFO terminals.
  • Page 59 IC, CXD2540Q Pin No. Pin Name Description Focus OK input. Used for SENS output and the servo auto sequencer. Spindle motor output filter switching output. Spindle motor on/off control output. Spindle motor servo control. High, when sampled value of GFS at 460Hz is high. LOCK Low, when sampled value of GFS at 460Hz is low by 8 times successively.
  • Page 60 Pin No. Pin Name Description DA11 DA11 output when PSSL=1. GTOP output when PSSL=0. DA10 DA10 output when PSSL=1. XUGF output when PSSL=0. DA09 DA09 output when PSSL=1. XPLCK output when PSSL=0. DA08 DA08 output when PSSL=1. GFS output when PSSL=0. DA07 DA07 output when PSSL=1.
  • Page 61 Pin No. Pin Name Description DATO Serial data output to SSP. XLTO Serial data latch output to SSP. Latched at the falling edge. CLKO Serial data transfer clock output to SSP. Mirror signal input. Used when the number of tracks is 128 or more for the 2N-track MIRR jump and M track move of the auto sequencer.
  • Page 62 IC, CL680 Pin No. Pin Name Description — No connection. — GND. CD BCK Bit clock input from CD DSP. CD DATA Data input from CD DSP. CD LRCK LRCK input from CD DSP. CD C2PO C2 pointer input from CD DSP. —...
  • Page 63 Pin No. Pin Name Description Y OUT Video signal “Y” OUT. AVDD DAC — Analog power supply (DAC) 3.3V. AGND DAC — Analog ground. R REF Reference resistor input. V REF Voltage reference input. AVDD DAC — Analog power supply (DAC) : 3.3V. C OUT Video signal “C”...
  • Page 64 Pin No. Pin Name Description __________ HINT Micon interface. (Host interrupt) CDG SCK CD-G serial clock input. — Ground. Micon interface. (Host clock) VDD3 — Power supply 3.3V. HD IN Micon interface. (Host data in) VDD3 — Power supply 3.3V. HSEL Micon interface.
  • Page 65 IC, LC74781M Pin No. Pin Name Description VSS1 — GND connection terminal. (Digital ground terminal). Xtal IN External X’tal and capacitor for internal sync generator, or the external clock are Xtal OUT connected to this terminal. (2fsc or 4fsc). Either the external clock input mode or the X’tal generator mode is selected by this CTRL1 selector terminal.
  • Page 66 Pin No. Pin Name Description ______________ Controls whether or not to input the VSYNC signal to the SEPIN input. L: to input the CTRL3 ______________ ______________ VSYNC signal. H: not to input the VSYNC signal. ________ System reset input terminal. Pull-up resistor is built-in. (Hysteresis input). VDD1 —...
  • Page 67 IC, µPD78016FGC Pin No. Pin Name Description RBPLS RADIAL BALANCE PLUS. AMUTE AUDIO ANALOG MUTE (H=MUTE ON). GFS. XVCDMD AUDIO/VIDEO CD MODE (L=VCD=SPINDLE GAIN UP). DOUT MUTE CONT. EMPH EMPHASIS. SQSO SQDATA FROM CD. SQCK SQCLK TO CD. — GND. SWNT SW TV OUT MODE (L=NTSC).
  • Page 68 Pin No. Pin Name Description 8.0MHz CERALOCK. — GND. — Nou used. 5.0VDD. AVSS — GND. XMPGRST MPEG BLOCK IC RESET. HSEL ADDRESS/DATA SEL TO CL680. INLSW INSIDE LIMIT SW . — Nou used. OSDXCS OSD CHIP SELECT. ABSEL CXA1992A/B SELECT (L=CXA1992A). CLVSEL CLV MODE SELECT (H=CLV-N).
  • Page 69 IC, SM5878M Pin No. Pin Name Description MODE = H: Soft mute ON/OFF terminal. (Mute at H). MUTE MODE = L: Attenuator level DOWN/UP terminal. (DOWN at H). DEEM De-emphasis ON/OFF terminal. (De-emphasis ON at H). Oscillator clock output. (16.9344 MHz). DVSS —...

  • Page 70: Ic Block Diagram

    IC BLOCK DIAGRAM IC, BA5915FP 6.65K 6.65K 6.65K 6.65K MUTE T.S.D: Thermal shut-down Resistors are in units of Ω. IC, M5291FP Switch collector Driver Peak currect Switch emitter detection External capacitance Power supply 1.17V for oscillation REF. VOL Ground Comparator input IC, LB1644...

  • Page 71: Test Mode

    TEST MODE 1. How to Activate CD Test Mode 2. How to Cancel CD Test Mode Insert the AC plug while pressing the function CD button. Either one of the following operations will cancel the CD test All FL display tubes will light up, and the test mode will be mode.

  • Page 72: Mechanical Exploded View 1/1

    MECHANICAL EXPLODED VIEW 1/1 P.C.B CHAS,MECHA P.C.B HLDR,MECHA P.C.B 3ZG-2 E1 CUSH CD A...

  • Page 73: Mechanical Parts List 1/1

    MECHANICAL PARTS LIST 1/1 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION 1 84-ZG1-239-210 PULLY,WORM N 21 84-ZG1-207-010 PULLEY,RELAY 2 84-ZG1-267-010 PULLEY,LOAD MO 8 22 84-ZG1-221-010 GEAR,MAIN TT 3 81-ZG1-239-010 S-SCREW,TT 23 84-ZG1-238-010 GEAR,WORM N 4 81-ZG1-291-110 GEAR,TRAY RELAY NO3 24 84-ZG1-224-010 LEVER,TT...
  • Page 74 CD MECHANISM EXPLODED VIEW 1/1 (3ZG-2 E1) P.C.B CD MECHANISM PARTS LIST 1/1 (3ZG-2 E1) REF. NO PART NO. KANRI DESCRIPTION 1 83-ZG2-243-110 CHAS ASSY,SHT 2 83-ZG2-235-010 GEAR,A3 3 83-ZG2-205-210 GEAR,B 4 83-ZG2-236-010 GEAR MOTOR 3 5 83-ZG2-240-010 SHAFT,SLIDE 3 6 87-A90-836-010 PICKUP,KSS-213F 8 83-ZG2-233-010...
  • Page 75 USE MODEL LIST CX-NAK572 CX-NK270 CX-NK290 CX-NK370 CX-NK570 CX-NK765 CX-NK770 CX-NK970 DX-SNKH100...

  • Page 76: Mechanical Section

    REFERENCE NAME LIST ELECTRICAL SECTION MECHANICAL SECTION DESCRIPTION REFERENCE NAME DESCRIPTION REFERENCE NAME ANTENNAS ADHESHIVE SHEET ADHESHIVE CHIP AZIMUTH C-CAP CAP, CHIP BAR-ANT BAR-ANTENNA C-CAP TN CAP, CHIP TANTALUM BATTERY C-COIL COIL, CHIP BATT BATTERY C-DI DIODE, CHIP BEARING C-DIODE DIODE, CHIP BUTTON C-FET...

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