Yamaha AX-496 User manual

AX-496/396
SERVICE MANUAL
STEREO AMPLIFIER
AX-496/396
100702
■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
ADJUSTMENTS ............................................................. 7
BLOCK DIAGRAM ......................................................... 8
µ-COM DATA ................................................................. 9
PRINTED CIRCUIT BOARD .................................. 10~25
SCHEMATIC DIAGRAM ........................................ 26~29
PARTS LIST ........................................................... 30~47
REMOTE CONTROL TRANSMITTER ........................ 48
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.
AX-496/396
P.O.Box 1, Hamamatsu, Japan

AX-496/396
1
435 (17-1/8")
Unit : mm (inch)
151 (5-15/16")
130 (5-1/8") 350 (13-3/4")21
(13/16")
19.5
(3/4")
21.5 (7/8")
391 (15-3/8")
■SPECIFICATIONS
■Power Section
Minimum RMS Output Power
8Ω, 20Hz to 20kHz, 0.019% THD
AX-496 85W+85W
AX-396 60W+60W
Maximum Output Power (EIAJ)
1kHz, 10% THD
AX-496 8Ω/6Ω130W / 150W
AX-396 6Ω110W
Dynamic Power (IHF)
8/6/4/2Ω
AX-496 130/150/185/220W
AX-396 100/120/140/150W
DIN Standard Output Power
4Ω, 1kHz, 0.7% THD
AX-496 120W
AX-396 95W
IEC Output Power
8Ω, 1kHz, 0.019% THD
AX-496 100W
AX-396 75W
Power Band Width
8Ω, Half power, 0.04% THD 10Hz to 50kHz
Damping Factor
8Ω, 20Hz to 20kHz 240
Frequency Response
20Hz to 20kHz 0±0.5dB
Total Harmonic Distortion (20Hz to 20kHz)
CD/DVD to SP OUT (8Ω, Half power) 0.008%
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 35µV
■Control Section
Input Sensitivity / Impedance
CD/DVD etc. 150mV / 47kΩ
PHONO 2.5mV / 47kΩ
Output Level / Impedance
REC OUT 150mV / 1.6kΩ
Headphone Jack Rated Output / Impedance
0.25V / 680Ω
Channel Separation
CD/DVD (Input 5.1kΩTerminated) 1kHz/10kHz 65 / 50dB
Tone Control Characteristics
BASS ±10dB (20Hz)
TREBLE ±10dB (20kHz)
Continuous Loudness Control
Attenuation -30dB (1kHz)
■General
Power Supply
R, T models AC110/120/220/240V, 50/60Hz
A model AC240V, 50Hz
B, G models AC230V, 50Hz
Power Consumption
AX-496 Approx. 210W
AX-396 Approx. 150W
AC Outlets (Switched)
R, T, G models 100W Max x 3
A, B models 100W Max x 1
Dimensions (W x H x D) 435 x 151 x 391mm
(17-1/8" x 5-15/16" x 15-3/8")
Weight
AX-496 9.5 kg (21lbs)
AX-396 8.7 kg (19lbs 3oz)
Accessories
Remote Control Transmitter
Batteries
Color
Gold / Black / Titan
* Specifications subject to change without notice.
R ........ General model T ..... China model
A ........ Australia model B .... British model
G ........ European model
• DIMENSIONS

AX-496/396
IMPEDANCE SELECTOR
WARNING:
Do not change the IMPEDANCE SELECTOR
switch setting while the power to this unit is
on, otherwise this unit may be damaged.
2
TAPE
STANDBY/ON
DECK A/B
DIR BDIR A
A/B/C/D/EPRESET
CD/DVDMD TAPE
TUNERAUX
RAX9 V499920
PHONO
–+
CD
TUNER
DISC SKIP
–+
VOLUME
WALL
OUTLET
EQUIPMENT
UNDER TEST
AC LEAKAGE
TESTER OR
EQUIVALENT
INSULATING
TABLE
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.
■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.
●Meter impedance should be equivalent to 1500 ohm shunted
by 0.15µF.
●Leakage current must not exceed 0.5mA.
●Be sure to test for leakage with the AC plug in both polarities.
■REMOTE CONTROL PANEL ■IMPEDANCE SELECTOR

AX-496/396
3
▼AX-496
▼AX-396
■FRONT PANELS
■REAR PANELS (AX-496)
R model

AX-496/396
4
B model
G model
T model
■REAR PANELS (AX-396)
R model

AX-496/396
5
B model
G model
A model
J model

AX-496/396
1
1
2
3
3
44
5
5
6
7
77
1
79 0 A8
32546
B
6
■DISASSEMBLY PROCEDURES
(Remove parts in the order as numbered.)
1. Removal of Top Cover
Remove 4 screws (1) and 4 screws (2) in Fig. 1.
2. Removal of Front Panel
a. Remove 6 screws (3) in Fig. 1.
3. Checking and Parts Replacement of MAIN P.C.B. (1)
a. Disconnect the power cord from the AC outlet.
b. Remove 3 screws (4) attaching the Speaker terminal
and Impedance Selector in Fig. 1.
c. Remove 2 screws (5) and remove 1 plastic rivet (6) in
Fig. 1, then remove the Sub Chassis.
d. Remove 4 screws (7) in Fig. 1, then remove the MAIN
P.C.B. (1) with Heat Sink and Chassis.
Fig. 1
■INTERNAL VIEW
1AX-496: MAIN P.C.B. (6) / AX-396: MAIN P.C.B. (7)
2MAIN P.C.B. (2)
3MAIN P.C.B. (1)
4MAIN P.C.B. (3)
5FUNCTION P.C.B. (4)
6FUNCTION P.C.B. (5)
7MAIN P.C.B. (9)
8MAIN P.C.B. (8)
9FUNCTION P.C.B. (7)
0FUNCTION P.C.B. (6)
AFUNCTION P.C.B. (1)
BFUNCTION P.C.B. (2)

AX-496/396
R553
R552 R560
R561
R553 (L ch)
R561 (R ch)
R552 (L ch)
R560 (R ch)
0.1mV〜10mV
Cut
■ADJUSTMENTS
Confirmation of Idling Current
•Right after Power is switched ON, confirm the voltages
measures at R553 (L ch) and R561 (R ch) are between
0.1mV to 10mV.
•If it exceeds 10mV, open (cut off) R552 (L ch), R560 (R
ch) and reconfirm the voltage.
7

AX-496/396
10dB
–10dB
PHONO
CD
SP A
SP B
PHONES
TUNER
AUX
TAPE1
PB
TAPE1
REC
MD
PB
MD
REC
CD DIRECT AMP
PHONO EQ AMP
CD DIRECT AMP CD DIRECT AMP
MOTOR
DRIVER
ON
ON
OFF
OFF 31.8dB
M
Main VR
10dB
SMU
LOUDNESS
BALANCE
TONE CONTROL
AUDIO
MUTE
A
B
POWER AMP
RYSP LB
15
–15
B
–B
LB
12S
+
+
+
+
+
+
AUDIO MUTE
SMU
Rec Select
Rec Select Data
Power ON
Power ON/OFF
RYPS
Remote Control
Input Select Data Input Select Main VR
Protection
RYSP
U-COM
RYPS
10dB
–10dB
PHONO
CD
SP A
SP B
PHONES
TUNER
AUX
TAPE1
PB
TAPE1
REC
TAPE2
PB
TAPE2
REC
CD DIRECT AMP
PHONO EQ AMP
CD DIRECT AMP CD DIRECT AMP
MOTOR
DRIVER
ON
ON
ON
OFF
OFF
OFF 33.5dB
M
Main VR
10dB
SMU
RYPS
LOUDNESS
BALANCE
TONE CONTROL
PURE DIRECT
AUDIO
MUTE
A
B
POWER AMP
RYSP LB
15
–15
B
–B
LB
12S
+
+
+
+
+
+
AUDIO MUTE
SMU
Rec Select
Rec Select Data
Power ON
Power ON/OFF
RYPS
Remote Control
Input Select Data Input Select Main VR
Protection
RYSP
U-COM
■BLOCK DIAGRAM
8
▼AX-496
▼AX-396

AX-496/396
No. Port I/O Form RE Function
1 P53 I I
2 P17 I/O O CEI Chip Enable (Input selector)
3 P16 I/O O CK Clock S-CLK
4 P15 I/O O DATA Data T x D
5 P14 I/O O
6 P13 I/O O TMO Tape Monitor
7 P12 I/O O VRUP Motor Volume (UP)
8 P11 I/O O VRDN Motor Volume (DOWN)
9 P10 I/O O RYPS Power Relay
10 P27 I I ENR Rotary Encoder (Right)
11 P26 I I ENL Rotary Encoder (Left)
12 P25 I I D34/5 AX-496, 396/596 Detect H: 496, 396 L: 596
13 P24 I I
14 P23 I I REC Rec Out Selector Detect IN3
15 P22 I I PRDC Protection (DC) IN2
16 P21 I I PRI Protection (Overload) IN1
17 P20 I I PRPS Protection (Power Supply) IN0
18 Vref I VREF
19 Xin I XIN
20 Xout O XOUT
21 Vss VSS
22 Vcc VCC
23 P50 I I PRINH Release the Protection
24 P61 I/O O
25 /RESET I /RESET
26 P30 I I PD Power Down Detect INT0
27 P31 I I REM Remote Control INT1
28 P32 I I D43 AX-493/393 Detect
29 P33 I I TPM Tape Monitor
30 P40 I/O O LEDTM LED (Tape Monitor)
31 P41 I/O O MUTE Mute
32 P42 I/O O RYSP Speaker Relay
33 P43 I/O O LSBY LED (Power)
34 P00 I/O I PS Power Key On Wakeup
35 P01 I/O I REM Remote Control (Wakeup) Key On Wakeup
36 P02 I/O O LEDP LED (Phono)
37 P03 I/O O LEDTM LED (Tuner)
38 P04 I/O O LEDC LED (CD)
39 P05 I/O O LEDM LED (Tape)
40 P06 I/O O LEDTP LED (MD)
41 P07 I/O O LEDA LED (AUX)
42 P52 I I
9
■µ-COM DATA
IC101 : M37478M4-409SP

ABCDEFGH I J
1
2
3
4
5
6
7
AX-496/396
To FUNCTION (7)
To FUNCTION (6)
HL
E
HR
RYSP
A
B
E
R
E
L
E
15
-15
YE BE
BE
RE
RE
OR
OR
To MAIN (6)
IMPEDANCE
SELECTOR
SPEAKERS
To FUNCTION (1)
MU S12 GND GND RYSP RYPS PRPS PRI PRD VRP VRG
11
■PRINTED CIRCUIT BOARD (Foil side)
10
P.C.B. MAIN (3)
AX-496
P.C.B. MAIN (1)

ABCDEFGH I J
1
2
3
4
5
7
AX-496/396
6
POWER
To MAIN P.C.B. (2)
POWER
TRANSFORMER
To MAIN (2)
GY BR
POWER
TRANSFORMER
To MAIN (1)
RE OR BE YE BE REOR
POWER
TRANSFORMER
To MAIN (2)To MAIN (4)
GYBR BR WH YE RE OR RE
WH RE YE
RE BR OR
To MAIN (5)
To MAIN (9)
To MAIN (1)
To MAIN (8)
(B, G models)
To MAIN (5) (R, T models)
AC OUTLETS
E +12 RYPS
GY BR WH BE
12
■PRINTED CIRCUIT BOARD (Foil side)
13
AX-496
P.C.B. MAIN (2)
P.C.B. MAIN (4) (R, T models)
P.C.B. MAIN (5) (R, T models)
P.C.B. MAIN (6)
P.C.B. MAIN (8) (B, G models)
P.C.B. MAIN (9)

ABCDEFGH I J
1
2
3
4
5
6
7
AX-496/396
REC OUT
INPUT VOLUME
CD/DVD DIRECT AMP PURE DIRECT
142
2221
TLO
E
TRO
-15
TLI
15
TRI
E
L
E
R
CE DATA CL -15 L E R 15 CDDL E CDDR CDM
VRG
VRP
PRO
PRI
PRPS
RYPS
RYSP
DG
DG
S12
MU
LSBY PH TU CD MD TA AU 5V REM DG PS
GND
CD-D
TPMLED
P-D/5V
To FUNCTION (11)
To FUNCTION (6)
To FUNCTION (4)
To FUNCTION (8)
To MAIN (1)
1
8
BASS TREBLE BALANCE LOUDNESS
-15 +15 E L E R E
To MAIN (1)
To FUNCTION (1)
TLO
E
TRO
-15
TLI
15
TRI
E
L
E
R
1514
AX-496
■PRINTED CIRCUIT BOARD (Foil side)
P.C.B. FUNCTION (1)
P.C.B. FUNCTION (2)
P.C.B. FUNCTION (3)
P.C.B. FUNCTION (6)

ABCDEFGH I J
1
2
3
4
5
7
AX-496/396
6
CD/DVD DIRECT AMP PURE DIRECT
To FUNCTION (1)
GND CD-D TPMLED P-D/5V
POWER
To FUNCTION (8)
LSBY 5V
STANDBY/ON
PS
DG
REM
5V
To FUNCTION (8)
PHONO TUNER CD/DVD TAPE MD AUX
To FUNCTION (1)
To FUNCTION (10)
To FUNCTION (9)
LSBY PH TU CD MD TA AU 5V REM DG PS
LSBY 5V
PS
DG
REM
5V
PHONES
SPEAKERS
AB
To MAIN (1)
HL E HR RYSP A B
CD/DVD
PHONO
To FUNCTION (4)
CDR E CDL -15 PHL E PHR 15
TUNER
AUX
IN
OUT
TAPE
IN
OUT
MD
1
1
15
15
16
16
30
30
CDR E CDL -15 PHL E PHR 15
CE
DATA
CL
-15
L
E
R
15
CDDL
E
CDDR
CDM
To FUNCTION (5)
To FUNCTION (1)
16 17
AX-496
■PRINTED CIRCUIT BOARD (Foil side)
P.C.B. FUNCTION (4)
P.C.B. FUNCTION (5)
P.C.B. FUNCTION (7)
P.C.B. FUNCTION (8)
P.C.B. FUNCTION (9)
P.C.B. FUNCTION (10) P.C.B. FUNCTION (11)

ABCDEFGH I J
1
2
3
4
5
6
7
AX-496/396
IMPEDANCE
SELECTOR
SPEAKERS
To FUNCTION (7)
To FUNCTION (6)
HL
E
HR
RYSP
A
B
E
R
E
L
E
15
-15
YE
RE
RE
OR
OR
To MAIN (6)
To FUNCTION (1)
MU S12 GND GND RYSP RYPS PRPS PRI PRD VRP VRG
■PRINTED CIRCUIT BOARD (Foil side)
P.C.B. MAIN (3)
AX-396
P.C.B. MAIN (1)
1918

ABCDEFGH I J
1
2
3
4
5
7
AX-496/396
6
To MAIN (9)
To MAIN (1)
To MAIN (8)
(A, B, G models)
To MAIN (5) (R model)
AC OUTLETS
E +12 RYPS
GY BR WH BE
POWER
To MAIN P.C.B. (2)
POWER
TRANSFORMER
To MAIN (2)
GY BR
POWER
TRANSFORMER
To MAIN (1)
RE OR BL OR RE
POWER
TRANSFORMER
To MAIN (2)To MAIN (4)
GYBR BR WH YE RE OR RE
WH RE YE
RE BR OR
To MAIN (5)
■PRINTED CIRCUIT BOARD (Foil side)
AX-396
P.C.B. MAIN (2)
P.C.B. MAIN (4) (R model)
P.C.B. MAIN (5) (R model)
P.C.B. MAIN (7)
P.C.B. MAIN (8) (A, B, G models)
P.C.B. MAIN (9)
20 21

ABCDEFGH I J
1
2
3
4
5
6
7
AX-496/396
INPUT VOLUME
CD/DVD DIRECT AMP
142
2221
TLO
E
TRO
-15
TLI
15
TRI
E
L
E
R
CE DATA CL -15 L E R 15 CDDL E CDDR CDM
VRG
VRP
PRO
PRI
PRPS
RYPS
RYSP
DG
DG
S12
MU
LSBY PH TU CD MD TA AU 5V REM DG PS
GND
CD-D
TPMLED
P-D/5V
To FUNCTION (11)
To FUNCTION (6)
To FUNCTION (4)
To FUNCTION (8)
To MAIN (1)
1
8
BASS TREBLE BALANCE LOUDNESS
-15 +15 E L E R E
To MAIN (1)
To FUNCTION (1)
TLO
E
TRO
-15
TLI
15
TRI
E
L
E
R
AX-396
2322
P.C.B. FUNCTION (1)
P.C.B. FUNCTION (2)
P.C.B. FUNCTION (3)
P.C.B. FUNCTION (6)
■PRINTED CIRCUIT BOARD (Foil side)

ABCDEFGH I J
1
2
3
4
5
7
AX-496/396
6
TAPE MONITOR
To FUNCTION (2)
POWER
To FUNCTION (8)
LSBY 5V
PHONO TUNER CD/DVD TAPE MD AUX
To FUNCTION (1)
To FUNCTION (10)
To FUNCTION (9)
LSBY PH TU CD MD TA AU 5V REM DG PS
LSBY 5V
PS
DG
REM
5V
CD/DVD DIRECT AMP TAPE MONITOR
To FUNCTION (1)
GND CD-D TPMLED P-D/5V
STANDBY/ON
PS
DG
REM
5V
To FUNCTION (8)
PHONES
SPEAKERS
AB
To MAIN (1)
HL E HR RYSP A B
CD/DVD
PHONO
To FUNCTION (4)
CDR E CDL -15 PHL E PHR 15
TUNER
AUX
IN
OUT
TAPE
IN
OUT
MD
1
18
9
1
15
15
16
16
16
30
30
CDR E CDL -15 PHL E PHR 15
CE
DATA
CL
-15
L
E
R
15
CDDL
E
CDDR
CDM
To FUNCTION (5)
To FUNCTION (1)
AX-396
24 25
■PRINTED CIRCUIT BOARD (Foil side)
P.C.B. FUNCTION (4)
P.C.B. FUNCTION (5)
P.C.B. FUNCTION (7)
P.C.B. FUNCTION (8)
P.C.B. FUNCTION (9)
P.C.B. FUNCTION (10)
P.C.B. FUNCTION (11) P.C.B. FUNCTION (12)

A
1
2
3
4
5
6
7
8
9
B C D E F G H I J K L
AX-496
★All voltage are measured with a 10MW/V DC electric volt meter.
★Components having special characteristics are marked sand must be replaced
with parts having specifications equal to those originally installed.
★Schematic diagram is subject to change without notice.
26
SCHEMATIC DIAGRAM
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
BCE
2SA1695
2SC4466
2SA1145
2SA970
2SC2705
2SC1815
2SA1015
2SC2240
2SA893A
2SC1890A
S4VB202SA1358
2SC4488
2SD1915F
2SC1740S
DTC144ES
2SA933S
EE
CC
B
B
ECB
+
–
~~
E
C
B
DIODES Anode
Cathode
NJM2068LD
1
8
LB1641 LC78211
1
10
TC4053BP
1
8
16
M37478M4-408SP
1
21
42
1
15
30
23
P1
5
IN 1
1
GND
4VZ
6IN 2
OUT 1
8
VCC 2
10
OUT 2
9
P2
INPUT LOGIC
PRE DRIVER
7
VCC 1
87654321
OUT1
–Vcc
+IN2
–IN2
OUT2
+Vcc
+IN1
–IN1
NJM2068LD
LC78211
Point 1and 2
Emitter of Q108
Collector of Q104
Point 3
Pin 20 of IC101
LB1641
AX-496
To MAIN (1)
see page 27
CD/DVD DIRECT
AMP OFF
CD/DVD DIRECT AMP ON
CD/DVD DIRECT AMP &
PURE DIRECT OFF
To MAIN (1)
see page 27
To/From MAIN (3)
see page 27
12.6
-12.7
14.2
-14.3
0
00
00 0 0
0
0
0
00
0
00
0
0
0 0
0
0
00
0
0
0 0 0 0
0 0
0
0
0000 000000 0
0
0 0.5
0.5
0.7
0.7
0.7
1.8 1.8
14.8 14.8
0
0
0
0 0
0
14.7
14.7
14.7
14.7
-14.8 -14.8 4.84.8
0
0
0
0
0
0000 0
0
0
0
0
0.7
0.7
4.84.7
4.7 4.7 4.7 4.7 4.7
4.7
4.8
4.8 2.9 4.8 4.8
4.8
4.8 4.8 4.8
4.8
4.8
4.8 4.8
4.8 4.8 4.8 4.8 4.8
4.7 4.7 1.8
0.9
1.7
4.7
4.7
4.7 4.8 0.2 4.8 4.8
4.8
2.2 2.3
0 0
0
0
4.8
0
0.9
0.6 0
0
0
0
0
0
0
0
0
0
1
2
3
0
6.1
6.1
5.4
5.4
5.4
4.8
4.7
6.5
6.5
12.1
12.812.8
12.8
4.8
0
0
0
0
0
0
0
-14.2
14.2
0
0
4.8
4.8
0.7
-1.7
-2.0 -5.0
14.6
14.6
1.7
0
0
00
0
0
0
0.1
0.1
-0.1
-0.1
-14.3
-14.3
14.3
14.3
0
PHONO EQ AMP
CD BUFFER
INPUT SELECTOR
MOTOR DRIVER
SYSTEM
CONTROL
RESET
PROTECTION
VOLUME AMP
TONE CONTROL AMP
87 5
6
87 5
6
21
4
3
21
4
3
87
5
6
2
341

A
1
2
3
4
5
6
7
8
9
B C D E F G H I J K L
SCHEMATIC DIAGRAM
27
AX-496
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
BCE
2SA1695
2SC4466
2SA1145
2SA970
2SC2705
2SC1815
2SA1015
2SC2240
2SA893A
2SC1890A
S4VB202SA1358
2SC4488
2SD1915F
2SC1740S
DTC144ES
2SA933S
EE
CC
B
B
ECB
+
–
~~
E
C
B
DIODES Anode
Cathode
AX-496
★All voltage are measured with a 10MW/V DC electric volt meter.
★Components having special characteristics are marked sand must be replaced
with parts having specifications equal to those originally installed.
★Schematic diagram is subject to change without notice.
To/From FUNCTION (1)
see page 26
From FUNCTION (7)
see page 26
From FUNCTION (6)
see page 26
0
0
0 0 0
0
00
00
50.1
-50.0
5.8
6.2
0
0.1
0.1 0.1
0.1
12.8
12.8 AC12.6
AC78.0
0.1
0.7 0.7
0.7
23.6 23.6 42.9
42.9
43.1
43.1
0
0
15.8
-15.8
-15.8
-15.2 -18.3
-18.3
18.3
15.8
15.2 18.4
0
0
0
00
0.60.6
00
48.8
-48.8
-48.8
-48.8
-48.1
-48.8
-49.3
-49.1 -49.1
-49.0 -49.0
-49.0-49.0
-49.0 -49.0
-49.0 -49.0
-49.0
49.2
48.9
49.3
50.0
50.0 50.0
-50.0
-50.0
-50.0 -50.0
50.0 50.0
50.0
50.0
50.0
50.0
49.5
49.5
49.0
50.0
-48.3
-1.1
-1.1
1.1
1.1 1.1
-1.1
-1.1
-1.1
-1.1
1.1
1.1
1.1
0.6
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
-0.5
-0.5
-0.5
-0.5
0.5 0.5
-0.5
-0.5
-49.0
48.7
-48.7
-48.7
-48.7
0.6 0.6
0
0
-2.5
-2.5
-0.3
RELAY DRIVER
POWER SUPPLY
POWER SUPPLY
POWER AMP
IMPEDANCE SELECTOR
POWER
= used