Onkyo TX-SR501/E Schematic

SERVICE MANUAL

SERVICE MANUAL

Page 1

AV RECEIVER

TX-SR501/E

Ref. No. 3772

062003

MODEL

TX-SR501/E

Black, Golden and Silver models

BMDD,BMDC
BMPP,SMPP,BMPA,GMPA
BMWT,GMWT,GMWR,GMWQ
GMGK

120V AC, 60Hz
230-240V AC, 50Hz
120/220-230V AC, 50/60Hz
220V AC, 50Hz

SAFETY-RELATED COMPONENT
WARNING!!

COMPONENTS IDENTIFIED BY MARK ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.

Specifications

Page 2

TX-SR501/E

AMPLIFIER SECTION

Continuous Average Power output (FTC)
All channels: 65 watts per channel min. RMS at

Continuous Power output (DIN)
Maximum Power output (EIAJ)
Dynamic power output:

Total Harmonic Distortion: 0.08% at rated power

IM Distortion: 0.08% at rated power

Damping Factor: 60 at 8 Ω
Input Sensitivity and Impedance

DIGITAL INPUT (OPTICAL 1, 2): 0.5 Vp-p, 75 Ω
DIGITAL INPUT (COAXIAL): 0.5 Vp-p, 75 Ω
LINE (CD, VIDEO 1, 2, 3, TAPE): 200 mV, 47 kΩ

Multichannel Input

(DVD FRONT L/C/R, SURR L/R): 200 mV, 47 kΩ
(SUBWOOFER): 36 mV, 47 kΩ

Output Level and Impedance

Rec out (TAPE, VIDEO 1): 200 mV, 470 Ω
Pre out (SUBWOOFER): 1 V, 470 Ω

Frequency Response: 10 Hz to 100 kHz,

Tone Control

Bass: ±12 dB at 50 Hz
Treble: ±12 dB at 20 kHz

Signal-to-Noise Ratio: CD/TAPE: 100 dB

Muting: –50 dB

8 Ω, 2 channels driven from 20 Hz
to 20 kHz with no more than 0.08%
total harmonic distortion.
80 watts per channel min. RMS at
6 Ω, 2 channels driven from 1 kHz
with no more than 0.1% total har­monic distortion.

× 2 at 6 Ω

85 watts
115 watts
160 watts
125 watts
85 watts

0.08% at 1 watt output

0.08% at 1 watt output

+1/–3 dB (Direct mode)

(IHF-A, Direct mode)

× 2 at 6 Ω
× 2 at 3 Ω
× 2 at 4 Ω

× 2 at 8 Ω

VIDEO SECTION

Input Sensitivity and Impedance

VIDEO (DVD, VIDEO 1, 2, 3): 1 Vp-p, 75 Ω
S VIDEO (DVD, VIDEO 1, 2, 3): 1 Vp-p, 75 Ω (Y)

COMPONENT VIDEO 1, 2: 1 Vp-p, 75 Ω (Y)

Output Level and Impedance

VIDEO (VIDEO 1, 2, MONITOR): 1 Vp-p, 75 Ω
S VIDEO (VIDEO 1, 2, MONITOR): 1 Vp-p, 75 Ω (Y)

COMPONENT VIDEO OUT: 1 Vp-p, 75 Ω (Y)

0.28 Vp-p, 75 Ω (C)

0.7 Vp-p, 75 Ω (P

0.28 Vp-p, 75 Ω (C)

0.7 Vp-p, 75 Ω (P

B

B

, PR)

, PR)

TUNER SECTION

FM

Tuning Range

North American models: 87.50-108.00 MHz (100 kHz steps)
Other models: 87.50-108.00 MHz (50 kHz steps)

Usable Sensitivity

Mono: 11.2 dBf, 1.0 µV (75 Ω, IHF)

Stereo: 17.2 dBf, 2.0 µV (75 Ω, IHF)

50 dB Quieting Sensitivity

Mono: 17.2 dBf, 2.0 µV (75 Ω)

Stereo: 37.2 dBf, 20.0 µV (75 Ω)
Capture Ratio: 2.0 dB
Image Rejection Ratio

North American models: 40 dB

Other models: 85 dB
IF Rejection Ratio: 90 dB
Signal-to-Noise Ratio

Mono: 76 dB

Stereo: 70 dB
Alternate Channel Attenuation: 55 dB
Selectivity: 50 dB (DIN)
AM Suppression Ratio: 50 dB
Total Harmonic Distortion

Mono: 0.2%

Stereo: 0.3%
Frequency Response: 30 Hz-15 kHz, –1.0 dB
Stereo Separation: 45 dB at 1 kHz

0.9 µV (75 Ω, DIN)

23 µV (75 Ω DIN)

30 dB at 100 Hz-10 kHz

AM

Tuning Range

North American models: 530-1,710 kHz (10 kHz steps)

European & Australian models: 522-1,611 kHz (9 kHz steps)

Worldwide models: 522-1,611 kHz (9 kHz steps), or

Usable Sensitivity: 30 µV
Image Rejection Ratio: 40 dB
IF Rejection Ratio: 40 dB
Signal-to-Noise Ratio: 40 dB
Total Harmonic Distortion: 0.7%

530-1,710 kHz (10 kHz steps)

GENERAL

Power Supply and Power Consumption:

AC 120 V, 60 Hz 4.6 A

AC 230-240 V, 50 Hz 370 W

AC 220-230 V and 120 V switchable, 50/60 Hz 370 W
Dimensions (W

Weight

North American models: 19.6 lbs., 8.9 kg

European models: 21.6 lbs., 9.8 kg

Other models: 21.8 lbs., 9.9 kg

× H × D): 17-1/8" × 5-7/8" × 14-13/16"

× 150 × 376 mm

435

REMOTE CONTROL

Transmitter: Infrared
Signal range: Approx. 16 ft., 5 meters
Power supply:

Two “AA” batteries (1.5 V

× 2)

Specifications and features are subject to change without notice. Power sup­ply and voltage vary depending on the area in which the unit is purchased.

SERVICE PROCEDURES

Page 3

TX-SR501/E

1. Replacing the fuses

This symbol located near the fuses indicates that the

fuse used is fast operating type. For continued protection against
fire hazard, replace with same type fuse. For fuse rating refer to
the marking adjacent to the symbol.

Ce symbole indique que le fusible utlise est a rapide.

Pour une protection permanente, n'untiliser que fusibles de
meme type. Ce darnier est la qu le present symbol est
appse.

CIRCUIT NO. PART NO.

DESCRIPTION

F6901,F6902 252198 or 8A-UL or

252261 8A-T/UL-ST2 <D>
252099 8A-EAK ,Fuse <O>

F901 252166 or 6.3A-UL/T-237 or

252260 6.3A-T/UL-ST2,Fuse <D/T/Q/R>

F902 252076, 3.15A-SE-EAK,

252242 or 3.15A-SE-TL250V or
252276 3.15A-SE-TL250V <O>

F903 252075, 2.5A-SE-EAK,

252241 or 2.5A-SE-TL250V or
252275 2.5A-SE-TL250V,Fuse <O>

Note: <D>:120V model only
<O>: Other models except 120V model
<T>: Asian model only for 230V
<R>: Chinese model only

<Q>: Hongkong model only

2. To initialize the unit

This device employs a microprocessor to perform various
functions and operations. If interference generated by an external
power supply, radio wave, or other electrical source results in
accident which causes the specified operations and functions to
operate abnormally.
To perform a result, please follow the procedure below.

1.Press and hold down the VIDEO-1 button, then press the
STANDBY/ON button.

2.After "CLEAR" is displayed, the preset memory and each
mode stored in the memory, such as surround, are
initialized and will return to the factory setting.

3. Unplug the power supply cord.

3. Safety-check out

(U.S.A. model only)
After correcting the original service problem, perform the
following safety check before releasing the set to the customer.

Leakage Current Check

Measure leakage current to a known earth ground(water pipe,
conduit, etc.) by connecting a leakage current tester between
the earth ground and exposed metal parts of the appliance
(input/output terminals, screwheads,metal overlays, etc.).
Plug the power supply cord directly into a 120V AC 60 Hz outlet
and turn Standby switch on. Any current meausred must not
exceed 0.5mA.

4.Setting the voltage selector (Worldwide models
only)

Worldwide models are equipped with a voltage selector to conform
with local power supplies. Be sure to set this switch to match the
voltage of the power supply in your area before plugging in the unit.

Determine the proper voltage for your area: 220-230 V or 120 V. If
the preset voltage is not correct for your area, insert a screwdriver
into the groove in the switch. Slide the switch all the way to the
upper (120 V) or to the lower (220-230 V), whichever is appropriate.

COMPONENT VIDEO

ANTENNA

FM

AM

75

Y

B

P

VIDEO 1

VIDEO 2

PR

12

IN

TAPE

DVD MONITOR

OUT

IN

IN

IN

OUT

REMOTE
CONTROL

OUT

IN

IN

SURR

FRONT

L

R

L

R

VIDEO 1

VIDEO 2

DVD

FRONT
SPEAKERS B

L

VIDEO

R

S VIDEO

CENTER

SUB

OOFER

W

L

R

FRONT
SPEAKERS A

SURROUND
SPEAKERS

L

R

CENTER
SPEAKER

SURROUND BACK
SPEAKER

AC OUTLET

SWITCHED
100W MAX.

VOLTAGE

SELECTOR

120 V

220-230 V

VOLTAGE

SELECTOR

120 V

220-230 V

SUBWOOFER
PRE OUT

VIDEO 1

/2/3

DVD IN

OUT

IN

DIGITAL INPUT

OPTICAL COAXIAL

OUT

IN

L

R

CD

5.Setting the AM tuning step frequency

(Worldwide models only)

If you are using the Worldwide model (i.e., your TX-SR501/
TX-SR501E has a VOLTAGE SELECTOR on the rear
panel), you need to set the AM tuning interval for compati­bility with AM broadcasts in your particular country. The ini­tial setting is 9 kHz.

North America: 10 kHz
Other countries: 9 kHz

TUNER

T o set the AM tuning interval, while
holding down the [TUNER] button,
press the [MEMORY] button.

MEMORY

FM MODE

CLEAR

Note:

All presets are deleted when you change this setting.

Controls & Connectors—Continued

Page 4

Rear Panel

TX-SR501/E

1 6

COMPONENT VIDEO

VIDEO 1

/2/3

DVD IN

IN

DIGITAL INPUT

OPTICAL COAXIAL

IN

L

SUBWOOFER
PRE OUT

R

CD

789JK M N O

ANTENNA

OUT

12

OUT

TAPE

AM

Y

P

B

PR

REMOTE
CONTROL

IN

L

R

VIDEO 2

IN

IN

VIDEO 2

OUT

OUT

FM
75

VIDEO 1

VIDEO 1

IN

IN

DVD MONITOR

OUT

IN

SURR

FRONT

L

R

DVD

CENTER

SUB
WOOFER

VIDEO

S VIDEO

L

4532

FRONT
SPEAKERS B

L

R

FRONT
SPEAKERS A

L

R

L

R

SURROUND
SPEAKERS

CENTER
SPEAKER

SURROUND BACK
SPEAKER

AC OUTLET

SWITCHED
100W MAX.

VOLTAGE

SELECTOR

220-230 V

K (19)

A COMPONENT VIDEO (10, 12, 14, 16)

These RCA/phono connectors can be used to connect a TV,
DVD player, or other AV component with component video
inputs and outputs.

B AM ANTENNA (22, 23)

These push terminals are for connecting an AM antenna.

C FM ANTENNA (22, 23)

This connector is for connecting an FM antenna.

D FRONT SPEAKERS B (21)

These push terminals are for connecting speaker set B.

E FRONT SPEAKERS A, SURROUND SPEAKERS,

CENTER SPEAKER & SURROUND BACK
SPEAKER (21)

These terminal posts are for connecting speaker set A, includ­ing the front, surround, center, and surround-back speakers.
They accept bare wires or banana plugs (European models
don’t accept banana plugs).

F AC OUTLET (11)

This switched AC outlet can be used to supply power to
another AV component. The connector type depends on the
country in which you purchased your TX-SR501/
TX-SR501E.

G DIGITAL INPUT OPTICAL 1, 2 & COAXIAL (10,

13, 14, 16–18)

These optical and coaxial connectors can be used to connect a
CD, DVD, or LD (laser disc) player, or other AV component
with digital outputs.

This (Remote Interactive) connector can be connected to
the connector on another Onkyo AV component, for
example, a CD player, DVD player, or cassette recorder. The
TX-SR501/TX-SR501E’s remote controller can then be used
to control that component. To use , you must make an ana­log RCA/phono connection between your TX-SR501/
TX-SR501E and the other AV component, even if they are
connected digitally.

L VIDEO 1 IN/OUT & VIDEO 2 IN (10, 14–16, 39)

These connectors can be used to connect a VCR or other AV
component. There are RCA/phono connectors for connecting
to stereo analog audio inputs and outputs, and S-Video and
composite video (RCA/phono) connectors for connecting to
video inputs and outputs.

M DVD IN/MULTI CH INPUT (10, 12, 13)

The FRONT, SURR, CENTER, and SUBWOOFER RCA/
phono connectors can be used to connect AV components with
multiple analog audio outputs, including DVD players with
individual 5.1 surround analog outputs. There’s an S-Video
input and composite video (RCA/phono) input for connecting
the video signal.

N MONITOR OUT (10, 12)

These S-Video and composite video (RCA/phono) outputs can
be connected to the video input on your TV or projector.

O VOLTAGE SELECTOR (Worldwide model only)

(5)

This voltage selector provides compatibility with power sys­tems around the world.

H SUBWOOFER PRE OUT (21)

This RCA/phono connector can be used to connect an active
subwoofer.

I CD IN (10, 17)

These RCA/phono connectors can be used to connect a CD
player with analog outputs.

J TAPE IN/OUT (10, 17, 18)

These RCA/phono connectors can be used to connect a cas­sette recorder, MiniDisc recorder, or other recorder with ana­log inputs and outputs.

Tip:

A turntable with a built-in preamp can be connected to a pair of
unused TX-SR501/TX-SR501E analog inputs. To connect a
turntable without a built-in preamp, you’ll need a commer­cially available phono preamp. See pages 17 and 18 and the
instructions supplied with your phono preamp and turntable for
more information.

120 V

Worldwide
model only

Front Panel

Page 5

North American Model

234589JKML6N7

TX-SR501/E

STANDBY/ON

AB

SPEAKERS

PHONES

OQR TUSP

Other Models

234589JKML6N7

1

STANDBY/ON

POWER

OFFON

AB

SPEAKERS

PHONES

STANDBY

STANDBY

AUDIO

SELECTOR

AUDIO

SELECTOR

DISPLAY

DISPLAY

MASTER VOLUME

STEREO

DIRECT

DSP

SURROUND

PRESET/ADJUST

DIGITAL INPUT

VIDEO 1

VCR

DIGITAL INPUT

VIDEO 1

SUBWOOFER

MODE

VIDEO

SUBWOOFER

MODE

VIDEO

FM MODE

MEMORY

CLEAR

2

3

VIDEO

FM MODE

MEMORY

CLEAR

VIDEO

2

3

DIMMER

DVD

DIMMER

DVD

TUNING

TAPE TUNER

TUNING

TAPE TUNER

SPEAKER ADJUST

SPEAKER ADJUST

AUDIO ADJUST

INPUT

C

D

STEREO

DIRECT

DSP

SURROUND

PRESET/ADJUST

AUDIO ADJUST

C

D

VIDEO 3

VIDEO L R

S VIDEO AUDIO

MASTER VOLUME

INPUT

VIDEO 3

OQR TUSP

A POWER switch (24)

The North American model doesn’t have this switch.
This is the main power switch. When set to OFF, the
TX-SR501/TX-SR501E is completely shutdown. When set to
ON, the TX-SR501/TX-SR501E is in Standby mode and the
STANDBY indicator lights up.
Don’t turn on the power until you’ve completed, and double

ked all connections.

chec

Note:

Turning on the TX-SR501/TX-SR501E may cause a momen­tary power surge that might interfere with other electrical
equipment on the same circuit. If this is a problem, plug the
TX-SR501/TX-SR501E into a different branch circuit.

VCR

VIDEO L R

S VIDEO AUDIO

B STANDBY/ON button (24)

This button is used to set the TX-SR501/TX-SR501E to On or
Standby. For models with a POWER switch, this button has no
effect unless the POWER switch is set to ON.

C STANDBY indicator (24)

This indicator lights up when the TX-SR501/TX-SR501E is in
Standby mode, and it flashes while a signal is being received
from the remote controller.

D DIMMER button (32)

This button is used to adjust the display brightness.

E DIGITAL INPUT button (24)

This button is used to assign the digital inputs.

F SUBWOOFER MODE button (25)

This button is used to select the Subwoofer modes.

Controls & Connectors—Continued

Page 6

TX-SR501/E

G MEMORY button (30, 31)

This button is used when storing and deleting radio presets.

H FM MODE button (31)

This button is used to select the FM radio Stereo and Mono
modes. It’s also used when deleting radio presets.

I TUNING [ ] [ ] buttons (30)

These buttons are used to tune into radio stations.

J Remote control sensor (5)

This sensor receives control signals from the remote control­ler.

K Listening mode buttons (36)

These buttons are used to select the listening modes.

L PRESET/ADJUST [ ] [ ] buttons (25, 26, 31,

37)

This button is used to select radio presets and adjust parameter
values.

M MASTER VOLUME control (28, 30)

This control is used to set the volume of the TX-SR501/
TX-SR501E.

N SPEAKER A & B buttons (28, 32)

These buttons are used to turn speaker sets A and B on and off.

O PHONES jack (33)

This 1/4-inch phone jack is for connecting a standard pair of
stereo headphones for private listening.

P DISPLAY button (32)

This button is used to display various information about the
currently selected source.

Q AUDIO SELECTOR button (28, 29)

This button is used to select the input signal format.

R Input selector buttons (24, 28–30, 39)

These buttons are used to select the audio and video sources:
CD, DVD, TAPE, TUNER, VIDEO 1, VIDEO 2, or VIDEO 3.

S SPEAKER ADJUST button (25, 26)

This button is used to adjust various speaker-related parame­ters.

T AUDIO ADJUST button (37)

This button is used to set the Bass, Treble, Late Night, Cinema
Filter, Center Image, Panorama, Dimension, and Center Width
functions.

U VIDEO 3 INPUT connectors (15, 39)

These S-Video, composite video (RCA/phono), and analog
audio (RCA/phono) inputs can be used to connect a video
camera or games console.

Display

12 3 4

56

For detailed information, refer to the pages in parenthesis.

1 A & B speaker indicators (28, 32)

Indicator A lights up when speaker set A is on. Indicator B
lights up when speaker set B is on.

2 MUTING indicator (33)

This indicator flashes when the TX-SR501/TX-SR501E is
muted.

3 Source/listening mode indicators (28, 36)

These indicators display information about the currently
selected source and listening mode.

4 Tuning indicators (30, 31)

TUNED (30): This indicator lights up when the TX-SR501/
TX-SR501E is tuned into a radio station.

AUTO (30): This indicator lights up when the Auto Tuning
function is on.

RDS (European model only) (31): This indicator lights
up when the TX-SR501E is tuned into a radio station that sup­ports RDS (Radio Data System).

MEMORY (31): This indicator lights up when programming
radio presets.

FM STEREO (31): This indicator lights up when the
TX-SR501/TX-SR501E is tuned into a stereo FM station.

5 SLEEP indicator (33)

This indicator lights up when the Sleep function has been set.

6 Message area

This area of the display shows various information about the
currently selected source.

Supplied Accessories

Page 7

Make sure you have the following accessories:

Indoor FM antenna

(connector type varies from

AM loop antenna

country to country)

Power-plug adapter

TX-SR501/E

Only supplied in certain countries. Use
this adapter if your AC outlet does not
match with the plug on the TX-SR501/
TX-SR501E’s power cord. (Adapter var­ies from country to country.)

Left

Left

Left

Left

Left

Left

Right

Right

Surround

Surround

Surround

Surround

Surround

Right

Surround

Left

Surround

Right

Surround

Left

3

Right

Right

Right

Right

Center

Center

Zone 2

Zone 2

Zone 2

Zone 2

Surround Back

Surround Back

Surround Back

Surround Back

Zone 2

Right

Zone 2

Left

Center

Zone 2

Right

Zone 2

Left

Surround Back

Right

Surround Back

Left

Center

Surround Back

Right

Surround Back

Left

Not supplied with North American and
European models.

75/300-ohm antenna

adapter

Remote controller &

two batteries (AA/R6)

Left

Left

Left

Left

Front

Front

Front

Front

Right

Right

Right

Right

Zone 2

Zone 2

Zone 2

Zone 2

/

/

/

/

SP-B

SP-B

SP-B

SP-B

Zone 2

Zone 2

Zone 2

Zone 2

/

/

/

/

Front

Left

Front

Right

SP-B

Left

SP-B

Right

Front

Left

Front

Right

SP-B

Left

SP-B

Right

1

2

Speaker Cable

Speaker cable labels

* In catalogs and on packaging, the letter added to the end of the product name indicates the color of the TX-SR501/TX-SR501E. Specifications and operation

are the same regardless of color.

Controls & Connectors—Continued

Page 8

TX-SR501/E

Remote Controller—RCVR Mode

RC-518M (North American model)

1J

2

3

4

K

L

Press this to select
RCVR mode

5

M

N
O

6

7
8

9

RC-479S (other models)

P

1J

2

3

4

K

L

Press this to select
RCVR mode

M

5

N

O

6

7

8

9

P

This page describes only those buttons that can be used to
control the TX-SR501/TX-SR501E when the remote con­troller is in RCVR mode (Rece

To select RCVR mode, press the [RCVR] button.

iver mode).

A SLEEP button (33)

This button is used to set the Sleep function. This function can
be set only with the remote controller.

B STANDBY/ON button (24)

This button is used to set the TX-SR501/TX-SR501E to On or
Standby.

C Listening mode buttons (36)

These buttons are used to select the listening modes.

D CINE FLTR button (37)

This button is used to set the Cinema Filter function.

E LATE NIGHT button (37)

This button is used to set the Late Night function.

F TEST, CH SEL & LEVEL [ ] [ ] buttons (27, 29,

33)

These buttons are used to set the level of each speaker individ­ually. This function can be set only with the remote controller.

G AUDIO SEL button (29)

This button is used to select analog or digital inputs for the
CD, DVD, TAPE, VIDEO 1, VIDEO 2, and VIDEO 3 sources.

H Input selector buttons (28, 30, 39)

These buttons are used to select the audio and video sources:
CD, DVD, TAPE, TUNER, VIDEO 1, VIDEO 2, and
VIDEO 3.

I MUTING button (33)

This button is used to mute the TX-SR501/TX-SR501E. This
function can be set only with the remote controller.

J PRESET [ ] [ ] buttons (31)

These buttons are used to select radio presets.

K DIMMER button (32)

This button is used to adjust the display brightness.

L Remote Controller Mode buttons (28, 40, 42)

These buttons are used to select the remote controller modes.
To select RCVR mode, press the [RCVR] button.

M SP A & SP B buttons (28, 32)

These buttons are used to turn on and off speaker sets A and B
individually.

N AUDIO ADJUST button (37)

This button is used to set the Bass, Treble, Late Night, Cinema
Filter, Center Image, Panorama, Dimension, and Center Width
functions.

O ADJUST [ ] [ ] buttons (37)

These buttons are used to adjust the functions selected with
the AUDIO ADJUST button.

P VOLUME [ ] [ ] buttons (27, 28, 33)

These buttons are used to set the volume of the TX-SR501/
TX-SR501E.

EXPLODED VIEW

Page 9

TX-SR501/E

11

Chinese
model only

32

33

U24

P901

U23
T901

33

F903
F901
F902

63

U25

33

2

U31

P101

U9

31

U15

U27

**

U28

U27

2

2

13

Q6055

5

U14

U10

**

U28

2

F6901
F6902

Q6050

Q6060

9

9

U21

U13

U26

Q6065

55

2

12

U17

U1

54

2

2

U22

U12

10

*

U4

P7503

2

4

3

*

P7502

*

17

17

U3

U6

17

16

18

1

2

51

21
22
23

56

52

25

53

53

24

TX-SR501/E

6

8

8

7

U5

21
22

* 3, 4 & U22:Except 120V model
** U27X2:Except 120V model

23

2

TX-SR501/E

Y

Page 10

A

BLOCK DIAGRAM

1

VIDEO3

CD

TAPE OUT

TAPE IN

VIDEO-3

2

VIDEO-2 IN

VIDEO-1 OUT

VIDEO-1 IN

DVD

MLS/MRS

3

C/SW

COAXIAL

OPTICAL 1
OPTICAL 2

OPTICAL OUT

4

VIDEO3

COMPOSITE VIDEO INPUT

VIDEO2
VIDEO1

DVD

VIDEO 3

S-VIDEO INPUT

VIDEO 2

5

VIDEO 1

DVD

BD3811K1

80
79 78

2
1

72

71

4
3
6
5

73
8

74

7

76
75

S

10

9

12

S

11
14
13
16
15

CTLA/B

VIDEO SW

YC

YC

YC

YC

LA7956

AK4586

LA7956

6dB

6dB

6dB

77

(1/2)
AK4586
2CH A/D

96/24

DIR

LA7956

FM/AM
TUNER
PACK

OSC

12.288MHZ
MX27L2000

MX27L4000

FLASH ROM

BCD

Main microprocessor

RDS
DECODER
BU1923F

European model only

INPUT GAIN

INPUT GAIN

INPUT GAIN

INPUT GAIN

INPUT GAIN

BACK UP

INPUT GAIN

0/6dB

0/6dB

0/6dB

0/6dB

0/6dB

0/6dB

SELCL

SELMUT

SELDA

KEY

FL DISPLA

69

66

43

40

30

33

CS493292

A17

A16

A15

0dB

0dB

0dB

1

1

18

NC

-1

20
NC

-1

17

19

AK4586

DSP

M5M5V1080KV
UPD441000LGU
1M SRAM

+2.5V

DSP

ROM/RAM

RST.CS.INTREQ/CL/DA/SCDO

MEMORY

VMUT1

VMUT2

COMPOSITE VIDEO OUT

+3.3V

+5V

MONITOR OUT
VIDEO 1

S-VIDEO OUTPUT

Y

C

Y

C

MONITOR OUT

VIDEO 1

1

1

1

1

L

96/24
6CH D/A
AK4586

RST.CS/CL/DA/CDTO/INT1.2.

-6dB

INPUT ATT

50KLPF

50KLPF

R

50KLPF

SL

50KLPF

SR

50KLPF

C

50KLPF

SW

50KLPF

SB

AK4384

2CH D/A

REMOTE
SENSOR

2321262528

27

OPAMP

10.5dB

OPAMP

12.5MHZ

MAIN MICRO
PROCESSOR

78K/4
UPD7842
25AGC

SUB MICRO
PROCESSOR

78K/0

UPD780232
GC-8BT

STANDBY

24

22

5MHZ

TX-SR501/E

Page 11

A

BLOCK DIAGRAM

1

VOLUME

MASTER

0~-103dB

OUTPUT GAIN

68

OUTPUT GAIN

65

OUTPUT GAIN

OUTPUT GAIN

39

OUTPUT GAIN

31

OUTPUT GAIN

34

0~18dB
OPAMP

OUTPUT GAIN

0~18dB
OPAMP

OPAMP

2

69

66

43 42

40

30

33

0~18dB
OPAMP

0~18dB
OPAMP

0~18dB

OPAMP

0~18dB
OPAMP

36

BASS/TREBLE

BASS/TREBLE

15dB

BASSBOOST

38

37

35

Q305

OPAMP

BCD

Power Amplifier

55

57

+27dB

+27dB

+27dB

+27dB

+27dB

SWPO

+27dB

AMUT

HEADPHONE

L
R
SPBL
SPBR
SL
SR
C
SB

BD3812

3

VOLTAGE
SENSOR

CURRENT
SENSOR

VOLTAGE
SENSOR

VOLH

SEC1H

SEC1H

CONTROL

4

AUDIO

AUDIO

+7V

-7V

STANDBY

+12V

-12V

-VP

VIDEO

AF/TU

AF

+5.6V

-27V

+12V
+12V

-12V

+B1

SEC1H
RELAY

RELAY

+B2

+B1H

+B1L

T902

SEC1

SEC2

PROTE
CTION

PRO

PRI

T901

FUSE

SPHP

SPF

SPCS

HPMUT

POWER SW

POWER
RELAY

AC OUTLET

SPB

HPDET

POWER

AC IN

SEC3

DSP/TU

+5V

FLAC

AY

5

To FL TUBE

FLAC

RI INTER

FACE

RI

TX-SR501/E

100K

Page 12

A

SCHEMATIC DIAGRAM 1

NADIS-7403

U3

1

2

D7502

UDZ5.1B

R7505

220K

3

F2F2NPNPP35
59

Q7504

KRA103S

D7503
1SS352

56

57

58

P34

55

54

R7532

BCD

Display and video sections

P33

P32

P31

P30

P29

P28

P27

P26

P25

P24

P23

P22

P21

P20

P19

P18

P17

P16

P15

P14

P13
33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

41

42

43

P46/FIP3840

R7504
10K

SYSOUT

47K

R7506

4.7K

R7507

4.7K

C7507

104Z

22
21

P47/FIP3939
P50/FIP4038
P51/FIP4137
P52/FIP4236
P53/FIP4335
P54/FIP4434
P55/FIP4533
P56/FIP4632
P57/FIP4731
P60/FIP4830
P61/FIP4929
P62/FIP5028
P63/FIP5127
P64/FIP5226
VDD025
AVDD24
VSS023

ANI220

4.7K

R7508

22:ANI0
21:ANI1

ANI319

AVSS18

4.7K

R7509

P41/FIP3345

P42/FIP3444

41:P45/FIP37

42:P44/FIP36

43:P43/FIP35

P01/INTP116

P02/TI17

1K

1K

10K

R7512

R7511

R7510

P34/FIP2850

P35/FIP2949

P36/FIP3048

P37/FIP3147

P40/FIP3246

Q7502

UPD780232GC

-030-8BT

P20/SCK314

P21/SO313

P2212

P2311

POO/INTP015

10K

10K

10K

10K

R7514

R7515

R7516

R7513

Q7501 HNA-16MM39T

P12

P11

P10P9P8P7P6P5P4P3P2P116G

26

27

28

29

30

31

32

FIP21 57

FIP22 56

FIP23 55

61:FIP19

P31/FIP2553

P32/FIP2652

P33/FIP2751

P24/BUSY10

IC5

P25SO19

P26/SI18

P27/SCK17 P30/FIP2454

X2

RESET

4

6

22

23

24

25

60

VLOAD

VDD259

FIP20 58

FIP18 62
FIP17 63
FIP16 64
FIP15 65
FIP14 66
FIP13 67
FIP12 68
FIP11 69
FIP10 70

FIP9 71
FIP8 72
FIP7 73
FIP6 74
FIP5 75
FIP4 76
FIP3 77
FIP2 78
FIP1 79

FIP0

VSS12

X13

1

VDD1

X7501
CST5.00MGW

21

61

80

15G

14G

13G

12G

11G

10G9G8G7G6G5G4G3G2G1GNPNPF1

10

11

12

13

14

15

16

17

18

19

20

10K

R7503

2SC2712

Q7503

KTC3875

F1
123456789

100K

2.7K

2.7K

R7521

C7510 102J

C7509 102J

220

R7531

D7505

STANDBY

Q7506

RN1402

KRC102S

VIDEO3

102J

C7511

R7522

10K

R7527

S7625

2.7K

R7523

10K

R7526

K2

VIDEO2

K3

S7624

102J

2.7K

R7520

C7508

U7501

SPS4441E1

100/6.3

C7514

102J

C7517

104Z

C7516

4

S7616

SP A

R7615

1.2K

S7501

S7615
SP B

R7614

820

NASW-7404

U4

S7614

STANDBY

R7613

560

104Z

C7515

JL7501B

SYSIN

JL7501A

GND
KEY0

R7626

S7627

FM

K0

K1

2.2K R7621 330R7625 1.2K R7624 820 R7623 560 R7622 470

S7626

MODE

IRF

STBYLED

VIDEO1

R7518

1K

560

VAJ

VBJ

R7517

R7528

SBMDI

SBMLDY

R7612 470 R7611330

S7613

DIM

MER

DVD

S7623

5

S7637

S7647

TUNI

NG<

R7646 2.2K

AUDIO

ADJUST

S7636

S7646

TUNI

PRE

NG<

SET>

S7635

S7645

MEMO

RY

PRE

SET<

S7634

S7644

TAPE

DSP

S7633

S7643

TUNER

SURRO

UND

1K

1K

560

R7529

R7524

R7530

SBMDO

SBMCLK

SBMRST

S7612

SW

S7622

AUDIO

R7631

CD

S7632

R7641 330R7645 1.2K R7644 820 R7643 560 R7642 470

S7642

STE

101J

C7522

MODE

SEL

330R7632 470R7633 560R7634 820R7635 1.2KR7636 2.2K

REO

102J

C7523

S7611

S7621

S7631

S7641

C7513

INPUT

DIGITAL

DIS

PLAY

SP

DIRECT

104Z

K0K1K2

ADJUST

K3

SYSIN

HPDET

SBMDI

SBMDO

SBMCLK

SBMLDY

TO NADG-7401

L7505

-VP

SBMRST

P7502A

220K

NCH1477

R7519

TX-SR501/E

2G
6

L7505

-VP

Page 13

A

U17

U3

1

1GNPNPF1F11

234

5

104Z

C7501

C7502

33/50

104Z

C7503

R7501

473Z

C7504

C7505

R7502

220

220

UDZ8.2B

D7501

473Z

NAETC-7838

RI

A
B

VMUT2

VMUT1

OPT2
DGND

TO NADG-7821

OPT1

+5V

COAX

104Z

C7506

OPTOUT

+12V

CNPT

P801B

BCD

PRINTED CIRCUIT BOARD VIEW 1-2

NASW-7404,Standby switch PC board

U4

TO NAVD-7831

SPA SPB

JL7501B

0

2

2

STANDBY

S7616 S7615

2

S7614

25137404

NCSW-7404

2

Component side

GND
GND

P206A

P243A

TO NAVD-7847

2

R7614

R7613

R7615

Soldering side

U6

3

NAETC-7406,Front video PC board

P253BP261B

P251

P254

P251

NCETC-7406

25137406

1

Component side

GND

GND

V4C

V4Y

R253

RL

R262

471J<O>

V4

R251

330

101J<D>

V4L

V4R

GND

R262

4

100K

R7519

D7507

1SS352

C7521

220/6.3

220K

NCH1477

L7504

220K

NCH1477

5

JL7502A

GND

FAC2

FAC1

HPL

HPR

HPE

+5.6S

GND

P7502A

P7503A

TO NAETC-7410

HPDET

GND
HPL
HPE
HPR

C7518

JL7502B

E7501

102J

C7519

102J

U5

C7520

102J

P7501

HEADPHONE

NAETC-7405

C262

C263
C253

Soldering side

NAETC-7406

R261

C261

S

YC

R253

P253B

P251

R252 75R251 75

75

C253

104Z

P254

U6

VIDEO3 IN

V

R261

471J<O>

C263

104Z

P261B

R252

330

C261

C262

101J<D>

TX-SR501/E

A

Page 14

A

BCD

SCHEMATIC DIAGRAM 4 Driver amplifier

NAAF-7830

1

U9

SL

R5093

C5013

R5003

1K

C5003

2

101K

R5043

D5003

MTZJ5.6B

22/16

R5013

56K

2.2K

R5103

100K

-0.1V

R5023

330

82K

-43.0V

C5023
10/50

Q5003

R5063

1.2K

R5113

1K

-0.7V

Q5013

R5053

4.7K
Q5053

-43.6V

R5073

560

R5083

3.3K

C5103
10/63

C5043
220/16

[100/16]

section

47.1V

C5073

0V

R5133

18K

C5093

-47.1V

C5113
10/63

120

101J

1.1V

C5083

040D

R5173

(1/4W)

R5163

120

(1/4W)

47.7V

Q5033

C5053
47/50

R5033

56K

-1.1V

Q5043

-47.7V

R5183

10

(1/4W)

48.5V

NF

-B1
+B1

B+
B-

R5193
10

(1/4W)

-48.5V

P6003A

(SCH-4)

TO NAAF-7842

P406

SR

R5094

C5014

R5004

3

1K

C5004

101K

R5044 2.2K

D5004

MTZJ5.6B

SB

22/16

R5014

56K

R5104

100K

-0.1V

R5024

330

R5095

4

C5015

R5005

1K

C5005

101K

R5045

D5005

MTZJ5.6B

22/16

R5015

56K

2.2K

R5105

100K

-0.1V
R5025

330

82K

-43.0V

C5024
10/50

82K

-43.0V

C5025
10/50

Q5004

Q5005

R5064

1.2K

R5065

1.2K

R5114

1K

-0.7V

R5115

1K

-0.7V

R5054

4.7K
Q5054

-43.6V

R5074

560

R5055

4.7K
Q5055

-43.6V

R5075

560

Q5014

Q5015

R5084

3.3K

R5085

3.3K

C5104
10/63

C5044
220/16

C5105
10/63

C5045
220/16

0V

R5134

18K

C5114
10/63

0V

R5135

18K

C5115
10/63

47.1V

C5074

-47.1V

47.1V

C5075

-47.1V

C5094

101J

120

C5095

101J

120

1.1V

C5084

040D

R5174

(1/4W)

1.1V

C5085

040D

R5175

(1/4W)

R5164

120

(1/4W)

47.7V

Q5034

C5054
47/50

R5034

56K

-1.1V

Q5044

-47.7V

R5165

120

(1/4W)

47.7V

Q5035

C5055
47/50

R5035

56K

-1.1V

Q5045

-47.7V

R5184

10

(1/4W)

R5185

10

(1/4W)

48.5V

NF

-B1
+B1

R5194
10

(1/4W)

-48.5V

48.5V

NF

-B1
+B1

R5195
10

(1/4W)

-48.5V

P6004A

B+
B-

P6005A

B+
B-

(SCH-4)

TO NAAF-7842

(SCH-4)

TO NAAF-7842

5

SEMICONDUCTORS

NO.

Q5000-05,5010-15 KTC3200-BL OR 2SC1775A-E,F OR 2SC1845-E

Q5030-35 KTA1024-Y,O OR 2SA949-Y,O
Q5040-45 KTC3206-Y,O OR 2SC2229-Y,O
Q5050-55 KTC3199-GR,2SC1740S-R,S,2SC2458-GR

TX-SR501/E

Page 15

A

BCD

SCHEMATIC DIAGRAM 4 Driver amplifier

TO NADG-7821

1

P406A

E

ESBECESLESRERE

2

3

(SCH-2)

E
E
E
E
E
E

(SCH-4)

E

TO NAAF-7842

E
E
E

P6011A

P306A

L

L

R5090

82K

C5010

R5000

1K

C5000

101K

R5040

D5000

MTZJ5.6B

R

R5001

1K

C5001

101K

R5041 2.2K

D5001

MTZJ5.6B

22/16

C5011
22/16

R5010

56K

2.2K

R5100

100K

R5011

56K

R5101

100K

-0.1V
R5020

330

-43.0V

C5020
10/50

R5091

82K

-0.1V
R5021

330

-43.0V

C5021
10/50

R5060

Q5001

R5061

1.2K

1.2K

R5110

1K

-0.7V

R5111

1K

-0.7V

R5050

4.7K
Q5050

-43.6V

R5070

560

R5051

4.7K
Q5051

-43.6V

R5071

560

Q5010Q5000

Q5011

section

C5100
10/63

C5040

220/16

R5130

R5080

3.3K

C5101
10/63

C5041

220/16

R5131

R5081

3.3K

0V

18K

C5110
10/63

0V

18K

C5111
10/63

47.1V

C5070

-47.1V

47.1V

C5071

-47.1V

C5090

101J

R5170

120

C5091

101J

R5171

120

1.1V

C5080

040D

(1/4W)

1.1V

C5081

040D

(1/4W)

R5160

120

47.7V

Q5030

C5050
47/50

R5030

56K

-1.1V

Q5040

-47.7V

R5161

120

47.7V

Q5031

C5051
47/50

R5031

56K

-1.1V

Q5041

-47.7V

(1/4W)

(1/4W)

R5180

10

(1/4W)

R5181

10

(1/4W)

48.5V

NF

-B1
+B1

R5190
10

(1/4W)

-48.5V

NF

-B1
+B1

R5191
10

(1/4W)

-48.5V

P6000A

B+
B-

48.5V

P6001A

B+
B-

(SCH-4)

TO NAAF-7842

(SCH-4)

TO NAAF-7842

U9

C

R5092

4

C5012

R5002

1K

C5002

101K

R5042

D5002

MTZJ5.6B

22/16

R5012

56K

2.2K

R5102

100K

-0.1V
R5022

82K

330

-43.0V

C5022
10/50

Q5002

R5062

1.2K

R5112

1K

-0.7V
R5052

4.7K
Q5052

-43.6V

R5072

560

Q5012

R5082

3.3K

C5102
10/63

C5042

220/16

0V

R5132

18K

C5112
10/63

47.1V

C5072

-47.1V

C5092

101J

120

1.1V

C5082

040D

R5172

(1/4W)

R5162

120

47.7V

Q5032

C5052
47/50

R5032

56K

-1.1V

Q5042

-47.7V

(1/4W)

R5182

10

(1/4W)

NF

-B1
+B1

R5192
10

(1/4W)

-48.5V

48.5V

P6002A

B+
B-

(SCH-4)

TO NAAF-7842

5

SEMICONDUCTORS

NO.

Q5000-05,5010-15 KTC3200-BL OR 2SC1775A-E,F OR 2SC1845-E

Q5030-35 KTA1024-Y,O OR 2SA949-Y,O
Q5040-45 KTC3206-Y,O OR 2SC2229-Y,O
Q5050-55

KTC3199-GR,2SC1740S-R,S,2SC2458-GR