Onkyo R-805-TX Service Manual

SERVICE MANUAL

FM STEREO/AM TUNER

AMPLIFIER

MODEL R-805TX

R-805TX

Ref. No. 3681

052001

ENERGY SAVE

STANDBY/ON

PHONES

FM STEREO / AM TUNER AMPLIFIER

MEMORY

FM MODE

CLEAR

CD MD CDR/PC LINE/DVD

FM AM TAPE

WIDE RANGE AMPLIFIER
TECHNOLOGY

ACOUSTIC
PRESENCE

OFF/1/2/3

DISPLAY

VOLUME

PRESET

TUNING

R-805TX

INPUT

ENERGY SAVE

STANDBY/ON

PHONES

FM STEREO / AM TUNER AMPLIFIER

MEMORY

FM MODE

CLEAR

ACCUCLOCK

CD MD CDR LINE/DVD

FM AM TAPE

WIDE RANGE AMPLIFIER
TECHNOLOGY

Asian model European model

Silver model

SUPP, SUPT
SUDT

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

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 PARTS NUMBERS
APPEAR AS SHOWN IN THIS MANUAL.

ACOUSTIC
PRESENCE

OFF/1/2/3

DISPLAY

VOLUME

PRESET

TUNING

R-805TX

INPUT

MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPO­SED PARTS ARE ACCEPTABLY INSULATED FORM
THE SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.

SPECIFICATIONS

Amplier Section
Power output

20 watts per channel, min RMS, at 4
ohms, both channels driven 1 kHz,
with no mor e than 0.6% THD
15 watt per channel, min RMS, at
8 ohms, both channels driven 1 kHz,
with no mor e than 0.6% THD
2 X 20 watts at 4 ohms, 1 kHz, DIN
2 X 17 watts at 6 ohms, 1 kHz, DIN
2 X 15 watts at 8 ohms, 1 kHz, DIN
2 X 29 watts at 4 ohms, 1 kHz, EIAJ

Dynamic power output

2 X 24 watts at 4 ohms
2 X 17 watts at 8 ohms

otal harmonic distortion

0.6% at rated power

IM distortion

0.6% at rated power

Damping factor

30 at 8 ohms

Input Sensitivity and Impedance

TAPE/MD PLAY: 150 mV, 50 kohms
LINE IN: 150 mV, 50 kohms

Fr

equency and r esponse

10 to 50,000 Hz +0 / –3 dB

T

one contr ol

ACOUSTIC PRESENCE 1

+4 dB at 82 Hz

ACOUSTIC PRESENCE 2

+3 dB at 20.5 Hz, + 3 dB at 82 Hz

ACOUSTIC PRESENCE 3

+3 dB at 20.5 Hz, + 6 dB at 82 Hz

BASS

±8 dB at 100 Hz

TREBLE

±8 dB at 10 kHz

Signal to noise ratio

TAPE: 100 dB (IHF-A)

Muting

–∞ dB

Tuner Section
Tuning range

FM: 87.9 to 107.9 MHz (200 kHz steps)

(U.S. & Canadian models)

87.5 to 108.00 MHz (50 kHz steps)
(Other area models)

AM: 530 to 1710 kHz (10 kHz steps)

(U.S. & Canadian models)
522 to 1611 kHz (9 kHz steps)

Usable sensitivity

(Other area models)

FM: Mono 11.2 dBf,

1.0 µV (75 ohms IHF)

0.9 µV (75 ohms DIN)

Stereo 17.2 dBf,

2.0 µV (75 ohms IHF)

23.0 µV (75 ohms DIN)

AM: 30 µV

R-805TX

50 dB Quieting sensitivity

FM: Mono 17.2 dBf, 2.0 µV (75 ohms)

Stereo 37.2 dBf, 20.0 µV (75 ohms)

Captur e ratio

FM: 2.0 dB

Image r ejection ratio

FM: 40 dB (U.S. & Canadian models)

85 dB (Other area models)

AM: 40 dB

IF rejection ratio

FM: 90 dB
AM: 40 dB

Signal to noise ratio

FM: Mono 73 dB, IHF

Stereo 67 dB, IHF

AM: 40 dB

Selectivity

FM: 50 dB DIN

(±300 kHz at 40 kHz Devi.)

AM Suppr ession Ratio

50 dB

Harmonic distortion

FM: Mono 0.2%

Stereo 0.3%

AM: 0.7 %

Frequency response

FM: 30 to 15,000 Hz (±1.5 dB)

Stereo separation

FM: 45 dB at 1,000 Hz

30 dB at 100 to 10,000 Hz

Stereo thr eshold

FM: 17.2 dBf, 2.0 µV (75 ohms)
General
Clock precision

monthly error: +/-30 seconds

(at 25 degrees Celsius)

Power supply

AC 120 V, 60 Hz

AC 230 V, 50 Hz
Power consumption

61 W (120 V, 50 Hz)

54 W (230 V, 60 Hz)
Dimensions (W X H X D)

205 X 91 X 302 mm

8-1/16" X 3-9/16" X 11-7/8"
Weight

3.4 kg, 7.5 lbs

Specications and external appearance are
subject to change without notice as a result
of product improvement.

SERVICE PROCEDURES

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

F901

F902

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.

252158
252083

252069

Note: <D>: 120V model only
<P/T>: 230V model only

1.6A-UL/T237, Primary <D>

0.4A-SE-EAWK, Primary
<P/T>

0.8A-SE-EAK,AC outlet
<P/T>

R-805TX

5. Changing the AM band step

The tuning step selector switch is not provided in this model.
When you change the band step, change the parts as shown
below.

To 10kHz To 9kHz
R715 3.3k 10k
R716 5.6k Open

6. Adjustment of clock frequency

1. Connect the frequency counter to the terminal TP701.

2. Press and hold down the MEMORY button, then press the
DISPLAY button.(All segments on FL tube light on)

3. Adjust the trimmer capacitor C707 so that the reading of
frequency counter becomes 524.288 kHz+/-1Hz.

1. Press and hold down the MEMORY button, then press the
DISPLAY button.

2. Press the STANDBY/ON button.
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. Safety-check out

(120V model only)
After correcting the original service problem, perform the
following safety check before releasing the set to the customer.
Connect the insulating-resistance tester between the plug of power
supply cord and screw on the back panel.
Specifications: 3.3Mohm+/-10% at 500V.

4. Memory Preservation

This unit does not require memory preservation batteries. A
built-in memory power back-up system preserves the contents
of the memory during power failures and even when the unit is
unplugged. The unit must be plugged in order to char ge the
back-up system.
The memory preservation period after the unit has been
unplugged varies depending on climate and placement of the
unit. On the av erage, memory contents are protected over a
period of a few weeks after the last time the unit has been
unplugged. This period is shorter when the unit is exposed to a
highly humid climate.

PANEL VIEWS

FRONT PANEL

R-805TX

REAR PANEL

STANDBY/ON button Input source indicators

ENERGY SA VE indicator

ENERGY SAVE button

INPUT selector

ACOUSTIC PRESENCE button

Remote control sensor

FM STEREO / AM TUNER AMPLIFIER

ENERGY SAVE

STANDBY/ ON

PHONES

MEMORY

FM MODE

CLEAR

ACCUCLOCK

CLEAR or
FM MODE button

MEMORY button

PHONES jack

CD MD CDR LINE/DVD

FM AM TAPE

WIDE RANGE AMPLIFIER
TECHNOLOGY

INPUT

ACOUSTIC
PRESENCE

OFF/1/2/3

DISPLAY button

PRESET buttons
TUNING buttons

European models front panel shown.

VOLUME control

VOLUME

DISPLAY

PRESET

TUNING

R-805TX

CD recorder

Stereo cassette

tape deck

PROCESSOR

REC
INPUT

This unit (R-805TX)

CDR TAPE

ANTENNA

OUTINOUT

IN

L

AM

R

OUT

MD

CDINLINE/DVD PROCESSOR

L

FM
75

R

L

(illustration is European model)

R

IN

REC
INPUT

For the Asian model:
In addition to a CD
recorder, you can
connect a digital
audio processor to
this connector .

PLAY
OUTPUT

CDR TAPE

OUT

L

R

(

)

REC

CD

L

R

(

PLAY

OUT

(

REC

OUT

IN

)

MD

)

(

PLAY

IN

L

R

REMOTE

(

)(

)

PLAY

REC

IN

LINE/DVD

)

CONTROL

OUT

: Signal flow

OUTPUT

REC
INPUT

PLAY
OUTPUT

AUDIO
OUTPUT

CD player MD recorder DVD, LD or Video equipment

Connecting a sound processor (other than U.S. & Canadian models)

Connections

PLAY
OUTPUT

L

L

R

REMOTE

R

CONTROL

SPEAKERS

L

R

IN

OUT

CAUTION:

SPEAKER
IMPEDANCE
4 OHMS MIN.
/SPEAKER

AC OUTLET

AC 230-240V
50Hz
SWITCHED
100W MAX.

Display

RDS indicator
(non-U.S., non-Canadian models only)

AM/PM indicator

AUTO/MONO indicatorMEMORY indicator

AM

MONO PM RDS
W.DAY
W.END

MEMORY
REC
SLEEP

Timer setting Frequency

Multi display

indicators

AUTOTIMER

indicators

Tuning indicator

STEREO indicator

STEREO
MUTING

MIN
kHz
MHz

MUTING indicator

Sleep time indicator

1 Remove the jumper plugs.

ROCE

P

R

SO

S

IN

OUT

2 Connect the sound processor to the unit.

This unit (R-805TX)

ANTENNA

AM

FM
75

CDR TAPE

OUTINOUT

IN

L

R

OUT

MD

CDINLINE/DVD PROCESSOR

L

R

L

L

R

REMOTE

CONTROL

OUT

CAUTION:

SPEAKER
IMPEDANCE

R

4 OHMS MIN.
/SPEAKER

SPEAKERS

AC OUTLET

AC 230-240V
50Hz
SWITCHED
100W MAX.

.

L

R

IN

PROCESSOR

OUT

L

R

IN

Jumper plug

Sound processor

INPUT

OUTPUT

-

: Signal flow

REMOTE CONTROLLER

• You can control the other -connected components with the supplied remote controller.

• The remote controller buttons operate in the same way as the buttons on each component
with the same indication.

• For actual operations, please refer to the Instruction Manual for each component.

STANDBY/ON button
Toggles between STANDBY and
ON.

Tuner control

PRESET : Tuner preset select

buttons

FM :

FM band select button

AM :

AM band select button

TONE button
Enables you to set the tone.

Mode Select buttons

Pressing this button

TIMER:

repeatedly to select one of the
following eight settings.

WEEKDAY: T imer playback on
the specified day(s) of the week.

WEEKEND: Timer playback on
the specied day(s) of the week.

REC: T imer record setting
DAYSET: Sets the day of the

week (WEEKDAY & WEEKEND).
ADJUST: Sets the current time

and the day of the week.
24H/12H:Enables you to select

24-hour display or 12-hour dis­play by pressing the ENTER but­ton and using the UP /DOWN
buttons.

UP /DOWN : Enables you to

select a parameter after you
press the TIMER or TONE but­ton. Press the ENTER button to
confirm the selection.

ENTER:Press this button to con-

firm the selection made via the
TIMER, TONE, UP , or
DOWN button.

STANDBY/ ON

PRESET

REPEAT

PLAY MODE

REPEAT

MEMORY

REPEAT

TONE

TIMER

UP/DOWN

ENTER

CLOCK SLEEP EFFECT

F MA M

PAUSE / STEP

SCROLL

CLEAR

REC

RANDOM

CLEAR

DISC

PLAY MODE

CLEAR

REC

123

456

789

ACOUSTIC
PRESENCE

- - / - - -

10 / 0

REMOTE CONTROLLER

GRAPHIC EQ

MODE

INPUTTUNER

TAPE

DVD

CDR

MUTING

VOLUME

RC

M D

C D

-

456S

CLOCK button
Press this button to
display the current
time.

SLEEP button
Enables you to
make the Sleep
time setting.

INPUT button
Enables you to

select a listening
source.

MUTING button
Mutes the sound

temporarily .

VOLUME / but­tons
Enables you to
increase or decrease
the volume level.

ACOUSTIC PRES­ENCE button
Switches acoustic
presence off and
types.

Number buttons
Used to set the
time/day and select
the PRESET stations.

• Use the following buttons to control components that are connected to the - system.

Stereo cassette tape
deck control

: Reverse play button
: Stop button

Graphic equalizer con­trol

EFFECT: Effect select button

MODE: Mode select button
: Play button
: Rewind button

: Fast-forward button

MD recorder control

REPEA T:Repeat mode

button

SCROLL: Scroll button

DVD player control

: Chapter/track down

button

: Chapter/track up

button

: Stop button

PAUSE/STEP : Pause/Step

forward button

: Play button

CD player (or changer)
control

REPEAT : Repeat mode button
RANDOM :Random play

button
: Stop button
: Pause button
: Play button

MEMORY:Memory button
CLEAR : Clear button
DISC: Disc button for CD

changer

STANDBY/ ON

PRESET

REPEAT

PLAY MODE

REPEAT

MEMORY

REPEAT

TONE

TIMER

UP/DOWN

ENTER

CLOCK SLEEP EFFECT

F MA M

SCROLL

CLEAR

REC

RANDOM

CLEAR

DISC

PLAY MODE

CLEAR

REC

123

456

789

- - / - - -

10 / 0

REMOTE CONTROLLER

GRAPHIC EQ

PAUSE / STEP

ACOUSTIC
PRESENCE

MODE

INPUTTUNER

TAPE

DVD

CDR

MUTING

VOLUME

RC

M D

C D

-

456S

: Stop button
: Pause button
: Play button

PLAY MODE:Play mode

selection button

CLEAR:Clear button

REC:Recording button

: Track down button
: Track up button

CD recorder control

REPEAT :Repeat mode

button

PLAY MODE : Play mode

selection button
: Stop button
: Pause button
: Play button

CLEAR:Clear button

REC:Recording button

: Track down button
: Track up button

: Track down button
: Track up button

CD player (or changer) /
MD recorder /
CD recorder control

1~9, 10/0: Number buttons

--/--- : Ten’s hold button

R-805TX

EXPLODED VIEW

P901(P/PT)

10

P901

R-805TX

(D)

21

14

41

P801

3

P851

P966

10

P965

U8

12

U6

11

T901

4

F901

U2

F902

E901

Q527

U10

Q525

3

P953

23

Q526

15

6

U3

3

24

U5

8

1

U4

Q528

3

U1

3

31

2

5

17

3

20

19

32

ONKYO

26

25

3