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Yamaha AX-397 Service Manual

Yamaha ax-397 stereo amplifier service manual.
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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:
CONTENTS
TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . 2–3
IMPEDANCE SELECTOR . . . . . . . . . . . . . . . . . . . . . . 3
REMOTE CONTROL PANEL . . . . . . . . . . . . . . . . . . . 3
FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–6
SPECIFICATIONS /
INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
© 2005 YAMAHA CORPORATION. All rights reseved.
1 0 0 9 7 6
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
STEREO AMPLIFIER
AX-397
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.
ADJUSTMENT /
IC DATA /
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . 15–20
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . 21–22
7–8
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23–33
9
REMOTE CONTROL RAX15 . . . . . . . . . . . . . . . . . . 34
SERVICE MANUAL
SERVICE MANUAL
11
12
14
'05.09

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   Summary of Contents for Yamaha AX-397

  • Page 1: Important Notice

    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-397 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. 2. Leakage Current Measurement (For 120V Models Only)

  • Page 3: Front Panel

    AX-397 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. 2. If lead solder must be used, be sure to remove lead free...

  • Page 4

    AX-397 REAR PANELS C models R model T model...

  • Page 5

    AX-397 A model B model G, E models...

  • Page 6

    AX-397 L model J model...

  • Page 7: Specifications

    AX-397 SPECIFICATIONS AUDIO SECTION / GENERAL / Minimum RMS Output Power (Power Amp. Section) / Power Supply / C model ......AC 120 V, 60 Hz L/R, 20 Hz to 20 kHz C, R, T, A, B, G, E, L, J models (0.019% THD, 8 ohms) .

  • Page 8: Internal View

    AX-397 DIMENSIONS 435 (17-1/8") Unit : mm (inch) INTERNAL VIEW 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. FUNCTION (4) P.C.B. FUNCTION (5) P.C.B.

  • Page 9: Disassembly Procedures

    AX-397 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 ( ). (Fig. 1) b.

  • Page 10

    AX-397 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

    AX-397 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. 2. If the measured voltage exceeds 10.0mV, open (cut off) R51 (L ch), R52 (R ch) and reconfirm the voltage.

  • Page 12

    AX-397 IC DATA IC301 : M38503G4A-101FP (FUNCTION (1) P.C.B.) 8-bit Microprocessor /INT /PWM /INT CMP2 /INT /INT OUT2 /CNTR CLK2 /CNTR RDY1 RDY2 /(AN CLK1 /(AN /(AN /(AN /(LED /(LED /(LED /(LED COUT RESET /(LED /(LED /(LED /(LED Port Name...

  • Page 13

    AX-397 BLOCK DIAGRAM...

  • Page 14: Pin Connection Diagram

    AX-397 PIN CONNECTION DIAGRAM LM61CIZ NJM2068MD-TE2 NJU7312AM M38503G4A-101FP LB1641 TC4053BP 3: GND 2: Vout 1: +Vs Transistors 2SA970 (GR, BL) 2SA933AS (R, S) 2SA1358 (O, Y) 2SA1015 (Y) 2SD1915F (S, T) 2SC3421 (O, Y) 2SA1145 (O, Y) 2SC1704S (Q, R, S)

  • Page 15

    AX-397 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 MAIN (3) CB201 FUNCTION (11)

  • Page 16

    AX-397 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. (Side A) (Side B) Lead Free Solder Used...

  • Page 17

    AX-397 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 FUNCTION (8) P.C.B. (Side A) FUNCTION (1) CB305 FUNCTION (7) P.C.B.

  • Page 18

    AX-397 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) TAPE MONITOR CD/DVD DIRECT AMP STANDBY FUNCTION (1) CB303 FUNCTION (8) STANDBY CB603 INPUT FUNCTION (9) P.C.B. FUNCTION (10) P.C.B.

  • Page 19

    AX-397 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 FUNCTION (6) CB532 MAIN (2) CB151 Q23A Q23C IMPEDANCE SELECTOR FUNCTION (7) CB581 MAIN (1) Circuit No.

  • Page 20

    AX-397 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) CB213, 214 FUNCTION (12) CB681 CB154 POWER CABLE J211–213 J214...

  • Page 21

    AX-397 SCHEMATIC DIAGRAM (FUNCTION) Page 22 TO MAIN (1) W2 IC302, 501, 502, 531, 532: NJM2068MD-TE Dual OP-Amp 14.0 15.5 15.5 15.0 14.0 –IN – – –IN 14.8 –V 14.8 14.1 14.1 CD/DVD DIRECT AMP ON 14.7 -14.7 -14.5 13.5 -14.5...

  • Page 22

    AX-397 SCHEMATIC DIAGRAM (MAIN) Page 21 TO FUNCTION (12) CB681 Page 21 TO FUNCTION (1) W301 12.1 12.1 48.6 48.6 12.5 13.1 22.9 22.9 13.1 AC43.7 40.7 AC74.3 AC61.7 26.9 26.7 40.7 Page 21 50.5 (42.0) TO FUNCTION (1) CB306 40.7...

  • Page 23: Parts List

    AX-397 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 : CHIP ALUMI. ELECTROLYTIC CAP L.EMIT...

  • Page 24

    AX-397 P.C.B. FUNCTION Note) Those parts marked with “#” are not included in the P.C.B. ass'y.

  • Page 25

    AX-397 P.C.B. FUNCTION Note) Those parts marked with “#” are not included in the P.C.B. ass'y.

  • Page 26

    AX-397 P.C.B. FUNCTION & MAIN Note) Those parts marked with “#” are not included in the P.C.B. ass'y.

  • Page 27

    AX-397 P.C.B. MAIN Note) Those parts marked with “#” are not included in the P.C.B. ass'y.

  • Page 28

    AX-397 P.C.B. MAIN Note) Those parts marked with “#” are not included in the P.C.B. ass'y.

  • Page 29

    AX-397 P.C.B. MAIN & CHIP RESISTORS 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 Note) Those parts marked with “#” are not included in the P.C.B. ass'y.

  • Page 30: Exploded View

    AX-397 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) 3-1-3 3-2-2 3-1-5 3-16 3-41 3-1-10...

  • Page 31: Mechanical Parts

    AX-397 MECHANICAL PARTS Note) Those parts marked with “#” are not included in the P.C.B. ass'y.

  • Page 32

    AX-397 Note) Those parts marked with “#” are not included in the P.C.B. ass'y.

  • Page 33

    AX-397 Note) Those parts marked with “#” are not included in the P.C.B. ass'y.

  • Page 34: Schematic Diagram

    KI/O6 KI/O5 KI/O4 KI/O7 KI/O3 S1/LED KI/O2 47Ω KI/O1 KI/O0 XOUT 4.00MHz 1Ω 47µF 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-397 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...

  • Page 36

    AX-397...

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