AX496396.pdf

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AX-396&496_E
AX-496/396
AX-496/396
STEREO AMPLIFIER
SERVICE MANUAL
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.
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.
CONTENTS
SPECIFICATIONS . ......................................................... 1
TO SERVICE PERSONNEL .......................................... 2
REMOTE CONTROL PANEL ........................................ 2
IMPEDANCE SELECTOR ............................................. 2
FRONT PANELS ............................................................ 3
REAR PANELS .............................................................. 3
INTERNAL VIEW ........................................................... 6
DISASSEMBLY PROCEDURES ................................... 6
-COM DATA ................................................................. 9
PRINTED CIRCUIT BOARD .................................. 10~25
SCHEMATIC DIAGRAM ........................................ 26~29
PARTS LIST ........................................................... 30~47
REMOTE CONTROL TRANSMITTER ........................ 48
100702
P.O.Box 1, Hamamatsu, Japan
ADJUSTMENTS ............................................................. 7
BLOCK DIAGRAM ......................................................... 8
µ
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AX-496/396
SPECIFICATIONS
Power Section
Minimum RMS Output Power
8 Ω , 20Hz to 20kHz, 0.019% THD
AX-496
General
Power Supply
R, T models
AC110/120/220/240V, 50/60Hz
85W+85W
A model
AC240V, 50Hz
AX-396
60W+60W
B, G models
AC230V, 50Hz
Maximum Output Power (EIAJ)
1kHz, 10% THD
AX-496 8
Power Consumption
AX-496
Approx. 210W
Ω
/6
Ω
130W / 150W
AX-396
Approx. 150W
AX-396 6
Ω
110W
AC Outlets (Switched)
R, T, G models
Dynamic Power (IHF)
8/6/4/2 Ω
AX-496
100W Max x 3
A, B models
100W Max x 1
130/150/185/220W
Dimensions (W x H x D)
435 x 151 x 391mm
(17-1/8" x 5-15/16" x 15-3/8")
AX-396
100/120/140/150W
DIN Standard Output Power
4
, 1kHz, 0.7% THD
AX-496
Weight
AX-496
9.5 kg (21lbs)
120W
AX-396
8.7 kg (19lbs 3oz)
AX-396
95W
Accessories
IEC Output Power
8 Ω , 1kHz, 0.019% THD
AX-496
Remote Control Transmitter
Batteries
100W
Color
AX-396
75W
Gold / Black / Titan
* Specifications subject to change without notice.
Power Band Width
8
, Half power, 0.04% THD
10Hz to 50kHz
Damping Factor
8 Ω , 20Hz to 20kHz
240
R ........ General model
T ..... China model
A ........ Australia model
B .... British model
Frequency Response
20Hz to 20kHz
0
0.5dB
G ........ European model
Total Harmonic Distortion (20Hz to 20kHz)
CD/DVD to SP OUT (8 Ω , Half power)
0.008%
• DIMENSIONS
Signal to Nise Ratio (IHF-A-Network)
CD/DVD (Input Shorted, CD/DVD DIRECT AMP ON) 110dB
PHONO (Input Shorted)
88dB
Residual Noise (IHF-A-Network)
CD/DVD DIRECT AMP ON
35 µ V
Control Section
Input Sensitivity / Impedance
CD/DVD etc.
150mV / 47k Ω
PHONO
2.5mV / 47k Ω
Output Level / Impedance
REC OUT
150mV / 1.6k
Ω
Headphone Jack Rated Output / Impedance
0.25V / 680 Ω
Channel Separation
CD/DVD (Input 5.1k
Ω
Terminated) 1kHz/10kHz
65 / 50dB
Tone Control Characteristics
BASS
± 10dB (20Hz)
TREBLE
± 10dB (20kHz)
Continuous Loudness Control
Attenuation
-30dB (1kHz)
435 (17-1/8")
Unit : mm (inch)
1
Ω
Ω
±
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AX-496/396
TO SERVICE PERSONNEL
1. Critical Components Information.
Components having special characteristics are marked s
and must be replaced with parts having specifications equal
to those originally installed.
2. Leakage Current Measurement (For 120V Models Only).
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated
from supply circuits.
WALL
OUTLET
EQUIPMENT
UNDER TEST
AC LEAKAGE
TESTER OR
EQUIVALENT
INSULATING
TABLE
Meter impedance should be equivalent to 1500 ohm shunted
by 0.15
µ
F.
Leakage current must not exceed 0.5mA.
Be sure to test for leakage with the AC plug in both polarities.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic
(where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency
(and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA-
SON WHATSOEVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose
eyes to solder/flux vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before
handling food.
REMOTE CONTROL PANEL
IMPEDANCE SELECTOR
STANDBY/ON
DECK A/B
TAPE
DIR A
DIR B
DISC SKIP
CD
–
PRESET
+
A/B/C/D/E
TUNER
MD
TAPE
CD/DVD
AUX
PHONO
TUNER
IMPEDANCE SELECTOR
–
VOLUME
+
WARNING:
Do not change the IMPEDANCE SELECTOR
switch setting while the power to this unit is
on, otherwise this unit may be damaged.
RAX9
V499920
2
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AX-496/396
FRONT PANELS
AX-496
AX-396
REAR PANELS (AX-496)
R model
3
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AX-496/396
T model
B model
G model
REAR PANELS (AX-396)
R model
4
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