Yamaha AP-U70 Service Manual
  1. Manuals
  2. Brands
  3. Yamaha Manuals
  4. Amplifier
  5. AP-U70
  6. Service manual
Yamaha AP-U70 Service Manual

Yamaha AP-U70 Service Manual

Personal amplifier
Hide thumbs Also See for AP-U70:
Table of Contents

Advertisement

Quick Links

Download this manual
This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already
known and understood by the users, and have therefore not been restated.
WARNING:
IMPORTANT:
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and
service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore,
inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist,
please contact the distributor's Service Division.
WARNING:
IMPORTANT:
I CONTENTS
TO SERVICE PERSONNEL ........................................... 1
FRONT PANEL ............................................................... 2
REAR PANELS ............................................................... 2
SPECIFICATIONS ........................................................... 3
INTERNAL VIEW ............................................................ 4
DISASSEMBLY PROCEDURES .................................... 4
SELF DIAGNOSIS FUNCTION ............................... 5 - 13
STANDARD OPERATION CHART .............................. 14
IC DATA ................................................................ 15 - 24
1 0 0 7 3 5
PERSONAL AMPLIFIER
AP-U70
SERVICE MANUAL
IMPORTANT NOTICE
Failure to follow appropriate service and safety procedures when servicing this product may result in personal
injury, destruction of expensive components, and failure of the product to perform as specified. For these
reasons, we advise all YAMAHA product owners that any service required should be performed by an
authorized YAMAHA Retailer or the appointed service representative.
The presentation or sale of this manual to any individual or firm does not constitute authorization, certification
or recognition of any applicable technical capabilities, or establish a principle-agent relationship of any
form.
Static discharges can destroy expensive components. Discharge any static electricity your body may have
accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this
buss).
Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the
unit.
DISPLAY DATA ............................................................ 25
BLOCK DIAGRAM ................................................ 26 - 27
PRINTED CIRCUIT BOARD ................................. 28 - 35
IC BLOCK ............................................................. 36 - 37
SCHEMATIC DIAGRAM ....................................... 38 - 39
PARTS LIST .......................................................... 40 - 49
REMOTE CONTROL TRANSMITTER .......................... 50
PARTS LIST FOR CARBON RESISTORS .................. 51
AP-U70

Advertisement

Table of Contents
loading

Related Manuals for Yamaha AP-U70

Summary of Contents for Yamaha AP-U70

  • Page 1: Table Of Contents

    This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users, and have therefore not been restated.

  • Page 2: To Service Personnel

    AP-U70 I TO SERVICE PERSONNEL 1. Critical Components Information Components having special characteristics are marked Z AC LEAKAGE EQUIPMENT and must be replaced with parts having specifications equal WALL TESTER OR OUTLET UNDER TEST EQUIVALENT to those originally installed. 2. Leakage Current Measurement (For 120V Models Only)
  • Page 3 AP-U70 I FRONT PANEL I REAR PANELS M U, C models M B, G models M A model...
  • Page 4 AP-U70 I SPECIFICATIONS I GENERAL I AUDIO SECTION Power Supply Minimum RMS Output Power per Channel U, C models ..... . . AC 120V, 60Hz Stereo, 20Hz to 20kHz, 0.8% THD, 6Ω...

  • Page 5: Internal View

    AP-U70 I INTERNAL VIEW DSP P.C.B. MAIN P.C.B. OPERATION (1) P.C.B. OPERATION (2) P.C.B. I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) 1. Removal of Top Cover 2. Removal of Front Panel Remove 14 screws ( q and w ) and then remove the Remove 6 screws ( e ) and then remove the Front Top Covers in Fig.
  • Page 6 AP-U70 I SELF DIAGNOSIS FUNCTION This product has a built-in self diagnosis function (DIAG) that can be used for inspection, measurement and determination of a faulty point, if any. There are ten menu items, each of which has a number of sub menu items.
  • Page 7 AP-U70 G Starting DIAG While the opening message appearing at the power ON is on display, press the “DSP” key 3 times; quickly at the first and second times and keep pressing it at the third time until the DIAG function is started.
  • Page 8 AP-U70 When the protection function works and the power is turned off after DIAG was started When the protection function (*2) works, its history appears in the abbreviated form as described below and the power turns off. Correct the failure based on the history of the protection function.
  • Page 9 AP-U70 G Operation procedure of DIAG menu and SUB-MENU 1) Use the UP w (forward) / DOWN q (reverse) keys to select a main menu item. 2) In case of main menu items 1. ALL and 2. DEV neither of which has sub menu, the menu item is executed when the DSP key is pressed.
  • Page 10 AP-U70 Details of DIAG menu 1. ALL (Sequential test) This menu is used to execute major five items of the DIAG menu. The items are as follows. (Set the volume level to the intermediate value before execution.) Press the DSP key to advance one step to the next item.
  • Page 11 AP-U70 3. DSP 4. FL (DSP Test) (FL Test) This menu is a lighting program for the FL display. Using this menu, it is possible to set the sound field effect and input signals. 1. AUTO (Automatic FL change) There are 14 sub-menus.
  • Page 12 AP-U70 5. AD (AD Test) There are 13 sub-menu items. 3. JUDGE (Judgment of key voltage level) Checks if the voltage level of each key is within the normal 1. KEY (Key reception test) range by comparing it with the reference value.
  • Page 13 AP-U70 5. V-MAX 7. INIT (Memory initialization) Sets the main volume to 0dB. 1. MEMORY (Memory reset reservation) 6. V-MID60 Reserves the backup RAM to be reset to the factory Set the main volume to -20dB. setting before shipping. Actual initialization is executed when the power is turned 7.
  • Page 14 AP-U70 9. ERROR 10. DIT (Error history) (Digital input/output control) 1 – 8 E0 –E7 (Error history) 1. GENERAL The history of up to 8 errors is stored in memory. The error GENERAL category code output (0x00) codes are used to display it.

  • Page 15: Self Diagnosis Function

    AP-U70 I STANDARD OPERATION CHART POWER SW to ON or connecting AC cord Self-Diagnosis Backup memory mode? check Setting the initial settings Did it pass 3.5 seconds from the starting -up ? Is the power turned on at the standby mode ? Reseting Gate arry IC &...

  • Page 16: Ic Data

    AP-U70 I IC DATA IC417 : YSS928 AC3D3 RAMA10 RAMD2 RAMA11 RAMD1 RAMD0 VDD2 VDD2 SELI8 SELI7 OPORT7 SELI6 OPORT6 SELI5 OPORT5 RAMA12 OPORT4 RAMA13 OPORT3 RAMA14 OPORT2 RAMA15 OPORT1 RAMA16 OPORT0 RAMA17 ZEROBF2L OVFB/END ZEROBF2R ZEROFLG ZEROBF3L ZEROBF3R NONPCM...
  • Page 17 AP-U70 IC417 : YSS928 AC3D3 Name Function Crystal oscillator connecting terminal Crystal oscillator connecting terminal (24.576MHz ) SELI1 Built-in selector input 1 (SDOA1) SELI0 Built-in selector input 0 (SDOA0) SELOA Built-in selector output A (PAI7) SELOB Built-in selector output B (unconnected)
  • Page 18 AP-U70 IC417 : YSS928 AC3D3 Name Function SDWCKI1 Word clock input terminal for SDIB, SDOB interface (unconnected) SDBCKI1 Bit clock input terminal for SDIB, SDOB interface (unconnected) Ground terminal SDOB3 PCM output terminal from Sub DSP (SDOB3) SDOB2 PCM output terminal from Sub DSP...
  • Page 19 AP-U70 IC417 : YSS928 AC3D3 Name Function RAMA5 Sub DSP: External memory address terminal 5 RAMA2 Sub DSP: External memory address terminal 2 SELI13 Built-in selector input 13 (unconnected) SELI12 Built-in selector input 12 (unconnected) SELI11 Built-in selector input 11 (unconnected)
  • Page 20 AP-U70 IC436 : HD6417014F28 16 bit µ-COM (CPU) PE14/DACK0/AH PE15/DACK1 PA15 PLLVSS PLLCAP PLLVCC EXTAL XTAL PB2/IRQ0/RAS PB3/IRQ1/CASL PB4/IRQ2/CASH PB5/IRQ3/RDWR WDTOVF RAM/CACHE 3KB/1KB EXTAL XTAL PLLVCC PLLCAP PLLVSS DIRECT • MEMORY ACCESS • CONTROLLER INTERRUPT USER BUS STATE CONTROLLER BREAK...
  • Page 21 AP-U70 IC436 : HD6417014F28 16 bit µ-COM (CPU) Port Name Function PE14/DACK0//AH SP_ON Speaker relay control (H: ON, L: OFF ) PE15/DACK1 T_MUTE Tripath Amp Mute (Not used) Address bus Address bus Address bus Address bus Address bus Address bus...
  • Page 22 AP-U70 IC436 : HD6417014F28 16 bit µ-COM (CPU) Port Name Function Data bus Data bus Data bus Data bus Data bus Data bus Data bus Data bus Data bus Data bus Data bus Data bus XTAL XTAL Connect to crystal (7MHz)
  • Page 23 AP-U70 IC430 : USS-820DT-DB USB Device Controller Port Name Function No connect VDDA VDDA +3.3V power supply for analog PLL XTAL1 XTAL1 Crystal/Clock input XTAL2 XTAL2 Crystal/Clock output VDDT VDDT +3.3V power supply for USB transceiver DMNS DMNS USB Differential data bus minus...
  • Page 24 AP-U70 IC475 : LC27287B-TF3 Embedded Array Name Function Name Function PIO8 YSS928 OVFB X'tal in (GND) PIO9 YSS928 DTSDATA X'tal out (OPEN) PIO10 YSS928 ZEROFLOG /SIOIRQ Serial IRQ (OPEN) PIO11 YSS928 CRC /FIFOIRQ FIFO IRQ (/EAINT) PIO12 Extended I/O port (OPEN)
  • Page 25 AP-U70 IC475 : LC27287B-TF3 Embedded Array Name Function Name Function PAO1 Patch out (NC) PAI7 Patch input (YSS928 SELOA) PAO2 Patch out (NC) PAI8 Patch input (YSS928 DIRSDO) PAO3 Patch out (YSS928 SDIA) PAI9 Patch input (OPEN) PAO4 Patch out (YSS928 SDIB0)
  • Page 26 AP-U70 I DISPLAY DATA V301 : 8-ST-24GN (V6445100) PATTERN AREA G PIN CONNECTION Pin No. Connection F1 NP F1 NP 1G 2G 3G 4G 5G 6G 7G 8G P35 P34 P33 P32 P31 P30 P29 P28 P27 P26 P25 P24 P23 P22 NP F2 NP F2 Pin No.

  • Page 27: Block Diagram

    AP-U70 BLOCK DIAGRAM ADDRESS BUS DATA BUS DC-ON AC-DET(+12S) POWER DETECT/ RESET +5D-SUB RESET +3.3S IC412 +5S1 Q416, 419 XL403 +5S1 4M FLASH ROM SRAM 7MHz IC447 IC438 XL402 XL404 12MHz +3.3S +5S1 +3.3S 11.2896MHz RYBY FLASHCS SRAMCS 36 35...
  • Page 28 AP-U70 PRINTED CIRCUIT BOARD (Foil side) Point q (Pin 1 of IC417) Semiconductor Location DSP P.C.B. V : 2V/div, H : 50 nsec/div Ref. No. Location Ref. No. Location DC, 1 : 1 probe D413 IC401 (Lead Type Device) D414...
  • Page 29 AP-U70 PRINTED CIRCUIT BOARD (Foil side) Point t-A (CH1 : Emitter of Q416) Semiconductor Location DSP P.C.B. Point t-B (CH2 : Collector of Q419) Ref. No. Location Ref. No. Location V : 5V/div (CH1), V : 2V/div (CH2) D401 IC445...
  • Page 30 AP-U70 PRINTED CIRCUIT BOARD (Foil side) MAIN P.C.B. Semiconductor Location Ref. No. Location FROM : DSP CENTER RLCH /C MU /R MU RRCH /S MU FRCH PHONE FLCH AGND PRT I +12V PRT DC -15V SP ON +15V DGND /A MU...
  • Page 31 AP-U70 PRINTED CIRCUIT BOARD (Foil side) OPERATION (1) P.C.B. Semiconductor Location Ref. No. Location (Lead Type Device) D301 OPERATION (2) P.C.B. D302 D303 D304 W302 FROM : DSP (Lead Type Device) TO : MAIN D305 PHONES Ref. No. Location IC301 Ref.

  • Page 32: Ic Block

    AP-U70 IC BLOCK IC477 : CS5360-KSR IC439, 440 : AD1854JSRSRL IC432 : MSM514260C-60JS 24-Bit A/D Converter 24-Bit, 96kHz, Multibit Sigma-Delta D/A Converter 262,144-word x 16 bit Dynamic RAM DGND DVDD MCLK SDATA TIMING GENERATOR DQ16 2 10 20 19 CLATCH...

  • Page 33: Schematic Diagram

    AP-U70 SCHEMATIC DIAGRAM (DSP) Point q (Pin 1 of IC417) V : 2V/div, H : 50 nsec/div USB CONTROLLER DC, 1 : 1 probe TO OPE (1) P-E39/J37 Point w (Pin 4 of IC430) V : 1V/div, H : 50 nsec/div...
  • Page 34 AP-U70 IC6, 8 : µPC4570HA IC10, 11 : PQ05RD11 IC7 : BA15218N SCHEMATIC DIAGRAM (MAIN & OPERATION) +5.0V Regulator Dual OP-Amp Dual OP-Amp CIRCUIT CHANGES BY MARKET. – – – – 10.4 –Vm –Vm IC9 : STK402-030 O : USED...

  • Page 35: Parts List

    AP-U70 WARNING PARTS LIST Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. Carbon resistors (1/6W or 1/4W) are not included in the ELECTRICAL PARTS I ELECTRICAL PARTS List. For the parts No. of the carbon resistors, refer to last page.
  • Page 36 AP-U70 P.C.B. DSP Schm Schm Ref. PART NO. Description Ref. PART NO. Description V6550100 P.C.B. DSP(UC) C456 US035100 C.CE.M.CHP 0.1uF     16V V6550200 P.C.B. DSP(A) C462 US035100 C.CE.M.CHP 0.1uF     16V V6550300 P.C.B. DSP(BG) C463 UR837100 C.EL 10uF      16V CB409 VQ047100 CN.BS.PIN C464 UR837100 C.EL 10uF      16V...
  • Page 37 AP-U70 P.C.B. DSP Schm Schm Ref. PART NO. Description Ref. PART NO. Description C564 US062100 C.CE.M.CHP 100pF     50V C640 US062100 C.CE.M.CHP 100pF     50V C565 US062470 C.CE.M.CHP 470pF     50V C641 US062100 C.CE.M.CHP 100pF     50V C566 US062470 C.CE.M.CHP 470pF     50V C642 UU147100 C.EL 10uF      25V C567 US062470 C.CE.M.CHP 470pF     50V C643 UU147100 C.EL...
  • Page 38 AP-U70 P.C.B. DSP Schm Schm Ref. PART NO. Description Ref. PART NO. Description C703 US035100 C.CE.M.CHP 0.1uF     16V D407 VT332900 DIODE 1SS355 C704 US035100 C.CE.M.CHP 0.1uF     16V D408 VT332900 DIODE 1SS355 C705 US035100 C.CE.M.CHP 0.1uF     16V D411 VT332900 DIODE 1SS355 C706 US035100 C.CE.M.CHP 0.1uF     16V...
  • Page 39 AP-U70 P.C.B. DSP & OPERATION Schm Schm Ref. PART NO. Description Ref. PART NO. Description * IC477 XY172A00 IC CS5360‑KSR U403 V6022800 CN.FBRLINK 1P GP1FA551TZ IC478 XE518A00 IC uPC4574G2 XL401 V3625700 RSNR.CRYS 24.576MHz IC479 Xi297A00 IC TC74HCT04AF‑T1 * XL402 VE463500 RSNR.CRYS AT‑49/12.0MHz...
  • Page 40 AP-U70 P.C.B. MAIN Schm Schm Ref. PART NO. Description Ref. PART NO. Description V6440300 P.C.B. MAIN(UC) * C57 V6476700 C.EL 4700uF    50V V6440400 P.C.B. MAIN(ABG) * C58 V6476700 C.EL 4700uF    50V VM859600 CN.BS.PIN * C59 UU147330 C.EL 33uF      25V VQ047400 CN.BS.PIN FG650300 C.CE 3pF       50V...
  • Page 41 AP-U70 P.C.B. MAIN & CHIP RESISTOR Schm Schm Ref. PART NO. Description Ref. PART NO. Description V6322600 RELAY DC DH24D2‑OT(M)‑SL XB247A00 IC uPC4570HA * RY2 V2850400 RELAY DC ALKS321 * IC9 XY256A00 IC STK402‑030 20W 2CH V4040500 SCR.TERM IC10 XU814A00 PQ05RD11 +5V 1.0A * T1 XZ404A00 TRANS...
  • Page 42 AP-U70 EXPLODED VIEW 200-1 202 x1 2-11 2-12 3-12 2-21 1-14 3-22 3-11 1-21 1-15 3-21 3-14 3-15 1-13 1-21 3-13 1-21 1-11 1-18 1-19 3-22 3-21 1-21 1-17 1-21 1-21 1-16 1-12...
  • Page 43 AP-U70 MECHANICAL PARTS Ref. PART NO. Description Remarks Markets * 1‑1 V6440800 P.C.B. ASS'Y OPERATION * 1‑3 V7029600 CONNECTOR, FLAT CABLE 17P 230mm P=1.25 1‑5 Vi491100 FERRITE CORE * 1‑11 V6052600 FRONT PANEL * 1‑12 V6052800 BUTTON * 1‑13 V6052900 BUTTON/FUNC * 1‑14 V6053200 BUTTON ASS'Y * 1‑15 V6053300 LENS, LED...
  • Page 44 AP-U70 Ref. PART NO. Description Remarks Markets VH365800 PW HEAD B‑TITE SCREW 3x6‑8     MFC2 V2728500 BIND HEAD S‑TITE SCREW 4x7       MFZN2‑BL V5633800 TAPPING B‑TITE SCREW 3x6‑8     MFNI33 ACCESSORIES * 200 V6390100 REMOTE CONTROL TRANSMITTER RC‑7060‑01‑0014 200‑1 AAX14020 LID GRYJYE 60050007 * 202 V4382000 USB CABLE 4P  2.0m XZ674A00 CD‑ROM V1.0 BATTERY, MANGANESE SUM‑3,AA,R06 New Parts...

  • Page 45: Remote Control Transmitter

    AP-U70 REMOTE CONTROL TRANSMITTER I SCHEMATIC DIAGRAM POWER AUX1 KI/O0 KI/O1 KI/O2 AUX2 ON/OFF KI/O3 KI/O4 VOL+ VOL– MUTE KI/O5 OSC0 KI/O6 SW14 SW15 SW16 455kHz OSC1 KI/O7 HALL JAZZ CHURCH GAME SW17 SW18 SW19 SW20 MOVIE LIVE SW21 SW22...

  • Page 46: Parts List For Carbon Resistors

    AP-U70 Parts List for Carbon Resistors Value 1/4W Type Part No. 1/6W Type Part No. Value 1/4W Type Part No. 1/6W Type Part No. 1.0 Ω 3100 3100 7100 10 kΩ 7100 HJ35 HF85 HF45 HF45 ❊ 1.8 Ω 3180 7110 11 kΩ...

Table of Contents