SERVICE MANUAL - Nexo

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NXAMP4x4■ TEST PROGRAM1. Required itemsComputer: DOS/V computer x1 (Pentium 200MHz or more, Windows XP, USB Port)Software: Software for version up (JTAG Programmer)Cable: RLINK-ST (USB-JTAG adapter)Measuring equipment : Power consumption meterTools: RS-232C jig x1, GPI jig x1, SLOT jig x1RS-232C jigSLOT jiga-1b-1/ETH_CSD-SUB 9 pin female connector/ES_CSSPI_CLKSPI_MISOSPI_MOSIGPI jigSW1ES_SERIAL_RXES_SERIAL_TXINT_FROM_ESES_GPI13.3DES_GPI2ES_GPI3ES_I2S_DATA0D-SUB 25 pin male connectorES_I2S_DATA1ES_MCLKES_SCLKXTAL12.288MHzES_LRCKSOURCE_SELQ0Q1LV169Q2Q3Q0Q1LV169Q2Q3a-40 b-403.3D2. Test connection imageSLOT, GPI, RS-232C jigNXAMPMeasuringinstrument64
NXAMP4x43. Operation3-1. Entry of the test programWhile holding down the [SELECT4], [MUTE4] and [A]buttons simultaneously, turn the power switch on. Thestart up screen appears on the LCD.Start Up ScreenThen release your fingers from the buttons.The test program starts and the test menu screen appearson the LCD display.Test Menu Screen3-2. Executing the test and judgment displaySelect the desired test item from the table below usingthe rotary encoder, and press the [B] button to start thetest.Test Items List01 SWITCH02 ENCODER03 LED04 LCD05 RS23206 GPI07 PORT (no use)08 DSP09 WORD CLOCK10 12CAfter executing the test, the display returns to the testmenu screen if the test result is OK. If an error occurs,“ERROR” appears on the LCD and the test program isstopped. In that case, turn the power switch off and onagain as was done above in 3-1.4. Outline of tests4-1. SWITCH testPress the [B] button to start the test. The LCD shows oneby one the switch name to be tested as shown below.11 FLASH12 FAN13 SLOT14 ATTENUATION15 ANALOG16 BRIDGE17 CALIBRATION18 STANDBY19 QUITPress the switch displayed on the LCD as instructed oneby one.If all instructed switches are OK, the display automaticallyreturns to the test menu screen.4-2. ENCODER testPress the [B] button to start the test. The following displayappears.Turn the ENCODER knob clockwise. The 2nd line on thedisplay changes as shown below.TURN RIGHT 0 –> • • • • • –> TURN RIGHT 19The following display appears after the 2nd line on thedisplay reaches TURN RIGHT 19.Turn the ENCODER knob counterclockwise. The 2ndline on the display changes as shown below.TURN LEFT 0 –> • • • • • –> TURN LEFT 19The display returns to the test menu screen after the 2ndline on the display reaches TURN LEFT 19.4-3. LED testPress the [B] button to start the test. The following displayappears.The LEDs automatically light up one by one in a specificorder as shown on the next page.All LEDs will light at the same time after each LED individuallyhas been tested. Confirm that each LED is litnormally. If OK, press the [B] button to return the displayto the test menu screen.65
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SERVICE MANUAL■ CONTENTS PANEL LA
Page 3 and 4:
NXAMP4x4■ PANEL LAYOUT • Front
Page 5 and 6:
NXAMP4x4■ SERVICE PRECAUTIONS Saf
Page 7 and 8:
NXAMP4x4■ OVERALL ASSEMBLY WIRING
Page 9 and 10:
NXAMP4x43. Wiring of the FANConnect
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NXAMP4x4d, e) Fix the wires to the
Page 13 and 14: NXAMP4x4CN401YELLOW Fig. 20 NOTE:
Page 15 and 16: NXAMP4x4b-3) Then fasten these wire
Page 17 and 18: NXAMP4x4At the stage as shown in Fi
Page 19 and 20: NXAMP4x4o) Fasten the wires (WK0208
Page 21 and 22: NXAMP4x48. Color of the connectors
Page 23 and 24: NXAMP4x412. Confirmation of Switch
Page 25 and 26: NXAMP4x4■ DISASSEMBLY PROCEDURES
Page 27 and 28: NXAMP4x43. PSANHA Circuit Board(Tim
Page 29 and 30: NXAMP4x45. PSANHB Circuit Board(Tim
Page 31 and 32: NXAMP4x48. Upper left (CH1) PA unit
Page 33 and 34: NXAMP4x412. Front Panel Assembly(Ti
Page 35 and 36: NXAMP4x416. Lower left DC Fan(Time
Page 37 and 38: ■ LSI PIN DESCRIPTION NXAMP4x4
Page 39 and 40: NXAMP4x4CS4272-CZZR (X8487A0)CODECC
Page 41 and 42: NXAMP4x4NJU7630-M (X8682A0)Regulato
Page 43 and 44: NXAMP4x4SN74LVC157APWR (X6786A0)Dat
Page 45 and 46: NXAMP4x4• INANH Circuit Boardto C
Page 47 and 48: NXAMP4x4• CONTROL Circuit BoardAA
Page 49 and 50: NXAMP4x4• CONTROL Circuit BoardBP
Page 51 and 52: NXAMP4x4• OUTANH Circuit BoardPat
Page 53 and 54: NXAMP4x4• PN-AN Circuit BoardAEnc
Page 55 and 56: NXAMP4x4• PN-AN Circuit BoardBPat
Page 57 and 58: NXAMP4x4• PAANH Circuit BoardAA't
Page 59 and 60: NXAMP4x4• PSANHA, PSANHB Circuit
Page 61 and 62: NXAMP4x4• PSANHA, PSANHB Circuit
Page 63: NXAMP4x4• NX-DFLT Circuit BoardEx
Page 67 and 68: NXAMP4x4Switch the GPI jig to the G
Page 69 and 70: NXAMP4x44-15. ANALOG testPress the
Page 71 and 72: NXAMP4x4■ 71
Page 73 and 74: NXAMP4x4 73
Page 77 and 78: NXAMP4x4
Page 79 and 80: NXAMP4x41-5. Other0 dBu is defined
Page 81 and 82: NXAMP4x44-7. Channel separation1) G
Page 83 and 84: NXAMP4x4■
Page 89 and 90: NXAMP4x45) Click the [Create] butto
Page 93 and 94: NXAMP4x4■ OVERALL ASSEMBLY 1/2 8
Page 95 and 96: NXAMP4x4■ OVERALL ASSEMBLY 2/2 2
Page 97 and 98: NXAMP4x4REF NO. PART NO. DESCRIPTIO
Page 101 and 102: NXAMP4x4■ LOCATIONS OF HEAT SINK
Page 103 and 104: NXAMP4x4■ HEAT SINK UNIT L100 PS
Page 105 and 106: NXAMP4x4■ HEAT SINK UNIT L60 PSA
Page 107 and 108: NXAMP4x4■ HEAT SINK UNIT L50 PSA
Page 109 and 110: NXAMP4x4■ HEAT SINK UNIT MP-5 PA
Page 111 and 112: NXAMP4x4■ ELECTRICAL PARTS REF NO
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NXAMP4x4CONTROLREF NO. PART NO. DES
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NXAMP4x4REF NO. PART NO. DESCRIPTIO
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Page 121 and 122:
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NXAMP4x4PAANHREF NO. PART NO. DESCR
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Page 129 and 130:
Page 131 and 132:
NXAMP4x4CIRCUIT DIAGRAM■ CONTENTS
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KJIHGFEDCBANXAMP4x4■ WIRING DIAGR
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HGFEDCBANXAMP4x4■ BLOCK DIAGRAM 2
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HGFEDCBANXAMP4x4■ BLOCK DIAGRAM 4
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QPONMLKJIHGFEDCBANXAMP4x4■ CIRCUI
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Page 145 and 146:
HGFEDCBANXAMP4x4■ CIRCUIT DIAGRAM
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LKJIHGFEDCBANXAMP4x4■ CIRCUIT DIA
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LKJIHGFEDCBANXAMP4x4■ CIRCUIT DIA
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SERVICE MANUAL - Nexo

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