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Yamaha AX-497 Servise Manual
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Yamaha AX-497 Servise Manual

Stereo amplifier
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Table of Contents

See also: Owner's Manual
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3 7 63 1515 0
TE
L 13942296513
CONTENTS
TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . 2-3
IMPEDANCE SELECTOR . . . . . . . . . . . . . . . . . . . . . . 3
REMOTE CONTROL PANEL . . . . . . . . . . . . . . . . . . . 3
FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
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© 2005 YAMAHA CORPORATION. All rights reseved.
1 0 0 9 7 4
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
http://www.xiaoyu163.com
AX-497
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:
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.
IMPORTANT:
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.
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:
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).
IMPORTANT:
Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.
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STEREO AMPLIFIER
SERVICE MANUAL
SERVICE MANUAL

IMPORTANT NOTICE

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1 5
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . 15-20
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . 21-22
7-8
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-33
9-10
REMOTE CONTROL RAX15 . . . . . . . . . . . . . . . . . . 34
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Summary of Contents for Yamaha AX-497

  • 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

    AX-497 3 7 63 1515 0 TO SERVICE PERSONNEL AC LEAKAGE 1. Critical Components Information EQUIPMENT WALL TESTER OR Components having special characteristics are marked Z OUTLET UNDER TEST EQUIVALENT and must be replaced with parts having specifications equal to those originally installed.

  • Page 3: Impedance Selector

    AX-497 3 7 63 1515 0 Caution: 1. As the melting point temperature of the lead free solder is about 30°C to 40°C (50°F to 70°F) higher than that of the lead solder, be sure to use a soldering iron suitable to each solder.

  • Page 4: Rear Panels

    AX-497 3 7 63 1515 0 REAR PANELS U, C models R model L 13942296513 T model u163 http://www.xiaoyu163.com...
  • Page 5 AX-497 3 7 63 1515 0 K model A model L 13942296513 B model u163 http://www.xiaoyu163.com...
  • Page 6 AX-497 3 7 63 1515 0 G, E models L model L 13942296513 J model u163 http://www.xiaoyu163.com...

  • Page 7: Specifications

    AX-497 3 7 63 1515 0 SPECIFICATIONS AUDIO SECTION / GENERAL / Minimum RMS Output Power (Power Amp. Section) / Power Supply / U, C models ......AC 120 V, 60 Hz L/R, 20 Hz to 20 kHz U, C, R, T, K, A, B, G, E, L, J models (0.019% THD, 8 ohms) .

  • Page 8: Internal View

    AX-497 3 7 63 1515 0 DIMENSIONS 435 (17-1/8") Unit : mm (inch) INTERNAL VIEW L 13942296513 w e r MAIN (2) P.C.B. MAIN (4) P.C.B. (R, L models) MAIN (5) P.C.B. MAIN (1) P.C.B. MAIN (6) P.C.B. MAIN (3) P.C.B.

  • Page 9: Disassembly Procedures

    AX-497 3 7 63 1515 0 DISASSEMBLY PROCEDURES • Remove parts in disassembly order as numbered. • Disconnect the power cable from the AC outlet. 1. Removal of Top Cover a. Remove 4 screws ( ), 1 screw ( ) and 4 screws ( ).
  • Page 10 AX-497 3 7 63 1515 0 5. Removal of Amp Unit a. Remove 1 screw ( ) attaching the Impedance Selector. (Fig. 2) b. Remove 2 screws ( ) attaching the Speaker Termnal. (Fig. 2) c. Remove 2 screws ( ) and then remove the MAIN (4) P.C.B.

  • Page 11: Adjustment

    AX-497 3 7 63 1515 0 ADJUSTMENT CONFIRMATION OF IDLING CURRENT 1. Right after the power is turned on, confirm that the volt- age across the terminals of R64 (L ch) and R65 (R ch) are between 0.1mV to 10.0mV.

  • Page 12: Ic Data / Block Diagram

    TMO/DEST Tape Monitor (397)/Destination Distinction (497) VRUP Motor Volume (UP) VRDN Motor Volume (DOWN) Vss: when single chip mode is used, Vcc: when flash writing is used AX-497/397 Detect CD Direct Mute COUT /RESET Reset Oscillator In Oscillator Out Ground...
  • Page 13 AX-497 3 7 63 1515 0 BLOCK DIAGRAM L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 14: Pin Connection Diagram / Printed Circuit Board

    AX-497 3 7 63 1515 0 PIN CONNECTION DIAGRAM NJM2068MD-TE2 LM61CIZ NJU7312AM M38503G4A-101FP LB1641 NJU7313AM 3: GND 2: Vout 1: +Vs Transistors 2SA970 (GR, BL) 2SA933AS (R, S) 2SA2168 (S, T) 2SA1015 (Y) 2SD1915F (S, T) 2SC5291 (S, T)
  • Page 15 AX-497 3 7 6 3 1 5 1 5 0 PRINTED CIRCUIT BOARD (Foil side) FUNCTION (1) P.C.B. FUNCTION (1) P.C.B. (Side A) (Side B) Lead Free Solder Used FUNCTION (8) FUNCTION (4) FUNCTION (3) P.C.B. CB601 W451 (Side B) Lead Free Solder Used...
  • Page 16 AX-497 3 7 6 3 1 5 1 5 0 PRINTED CIRCUIT BOARD (Foil side) FUNCTION (5) P.C.B. FUNCTION (5) P.C.B. (Side A) (Side B) Lead Free Solder Used FUNCTION (4) P.C.B. FUNCTION (4) P.C.B. 1 3 9 4 2 2 9 6 5 1 3...
  • Page 17 AX-497 3 7 6 3 1 5 1 5 0 PRINTED CIRCUIT BOARD (Foil side) FUNCTION (6) P.C.B. FUNCTION (6) P.C.B. (Side A) (Side B) Lead Free Solder Used MAIN (1) FUNCTION (1) CB304 BASS TREBLE BALANCE LOUDNESS REC OUT 1 3 9 4 2 2 9 6 5 1 3 FUNCTION (8) P.C.B.
  • Page 18 AX-497 3 7 6 3 1 5 1 5 0 PRINTED CIRCUIT BOARD (Foil side) FUNCTION (9) P.C.B. FUNCTION (10) P.C.B. FUNCTION (11) P.C.B. (Side A) (Side A) (Side A) PURE DIRECT CD/DVD DIRECT AMP STANDBY FUNCTION (1) CB303...
  • Page 19 AX-497 3 7 6 3 1 5 1 5 0 PRINTED CIRCUIT BOARD (Foil side) Lead Free Solder Used MAIN (3) P.C.B. (Side A) MAIN (1) P.C.B. FUNCTION (1) CB306 (Side A) Q24A Q24C SPEAKERS 1 3 9 4 2 2 9 6 5 1 3...
  • Page 20 AX-497 3 7 6 3 1 5 1 5 0 PRINTED CIRCUIT BOARD (Foil side) Lead Free Solder Used MAIN (2) P.C.B. MAIN (4) P.C.B. (Side A) MAIN (4) (Side A) R, L models Circuit No. F211 MAIN (2)
  • Page 21 AX-497 SCHEMATIC DIAGRAM (FUNCTION) Page 22 TO MAIN (1) W2 3 7 6 3 1 5 1 5 0 PURE DIRECT ON 14.2 15.6 15.6 15.6 14.2 14.7 14.7 PURE DIRECT OFF 14.2 14.2 15.6 -16.9 -14.8 15.6 -14.8 -16.7...
  • Page 22 AX-497 SCHEMATIC DIAGRAM (MAIN) 3 7 6 3 1 5 1 5 0 Page 21 TO FUNCTION (12) CB681 Page 21 TO FUNCTION (1) W301 12.1 12.1 48.2 48.2 48.2 12.6 22.6 13.2 22.7 13.1 AC43.0 44.9 AC81.6 25.4 25.0...

  • Page 23: Parts List

    AX-497 3 7 63 1515 0 PARTS LIST ELECTRICAL PARTS WARNING Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS : C.A.EL.CHP...
  • Page 24 AX-497 3 7 63 1515 0 P.C.B. FUNCTION L 13942296513 u163 Note) Those parts marked with “#” are not included in the P.C.B. ass'y. http://www.xiaoyu163.com...
  • Page 25 AX-497 3 7 63 1515 0 P.C.B. FUNCTION L 13942296513 u163 Note) Those parts marked with “#” are not included in the P.C.B. ass'y. http://www.xiaoyu163.com...
  • Page 26 AX-497 3 7 63 1515 0 P.C.B. FUNCTION & MAIN L 13942296513 u163 Note) Those parts marked with “#” are not included in the P.C.B. ass'y. http://www.xiaoyu163.com...
  • Page 27 AX-497 3 7 63 1515 0 P.C.B. MAIN L 13942296513 u163 Note) Those parts marked with “#” are not included in the P.C.B. ass'y. http://www.xiaoyu163.com...
  • Page 28 AX-497 3 7 63 1515 0 P.C.B. MAIN L 13942296513 u163 Note) Those parts marked with “#” are not included in the P.C.B. ass'y. http://www.xiaoyu163.com...
  • Page 29 AX-497 3 7 63 1515 0 P.C.B. MAIN & CHIP RESISTORS L 13942296513 NOTE The chip resistor is not supplied as a replacement part. When a chip resistor is necessary, use the following part. AAX60720: CHIP RESISTOR SAMPLE BOOK u163 Note) Those parts marked with “#”...

  • Page 30: Exploded View

    AX-497 3 7 63 1515 0 EXPLODED VIEW 6 (12) 3-40 6 (7) 6 (10) 6 (6) 3-13 3-40 6 (8) 3-41 3-40 3-42 3-12 6 (1) 3-40 200-1 3-1-10 6 (2) 3-1-1 3-1-6 3-41 6 (11) 6 (3)
  • Page 31 AX-497 3 7 63 1515 0 MECHANICAL PARTS L 13942296513 u163 Note) Those parts marked with “#” are not included in the P.C.B. ass'y. http://www.xiaoyu163.com...
  • Page 32 AX-497 3 7 63 1515 0 L 13942296513 u163 Note) Those parts marked with “#” are not included in the P.C.B. ass'y. http://www.xiaoyu163.com...
  • Page 33 AX-497 3 7 63 1515 0 L 13942296513 u163 Note) Those parts marked with “#” are not included in the P.C.B. ass'y. http://www.xiaoyu163.com...

  • Page 34: Remote Control Rax15

    KI/O4 KI/O7 KI/O3 S1/LED KI/O2 47Ω KI/O1 KI/O0 XOUT 4.00MHz 1Ω 47µF L 13942296513 KEY NO. LAYOUT YAMAHA RAX15 IR CODE TABLE Code (ID1) Key Name Format DEVICE TAPE (no key) (no code) POWER 7A-1D CD/DVD 7A-15 PHONO 7A-14 TUNER...
  • Page 35 AX-497 3 7 63 1515 0 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...
  • Page 36 3 7 63 1515 0 AX-497 L 13942296513 u163 http://www.xiaoyu163.com...

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