Onkyo TX-SR444 User manual

Service Manual
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 MESUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY
INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE
CUSTOMER.
Published by Onkyo & Pioneer Corporation Grobal CS Department
TX-SR444
AV RECEIVER
Ref.No. : ４５１８－Ｒ３
✔Pre Issue (2015-Apr)
✔Final Issue (2015-May)
CONTENTS
✔Front Cover (This page)
✔Note for Parts List
✔Panel
✔Reset
✔Amp Diag Mode afterAbnormal Conditions
✔Model and Destination
✔Firmware
✔Adjustment ( Unnecessary )
✔Hookup and Setting
✔Trouble Shoot
✔Disassembly
✔Schematic Diagram
✔Exploded View
✔Appendix

543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
Note for Parts List
COMMON
When parts list is EXCEL file, please refer to the following explanation about file name.
Destination
Look at the rear panel serial number 6 digit.
○○○○○J○○○○○○○○○○
Model No. Color
Voltage
Look at the rear panel serial number 5 digit.
○○○○J○○○○○○○○○○○
Voltage
J 100V AC
D 120V AC
M 220-240V AC
P 230V AC
U 100-240V AC
Speaker System (without AMP.) :
0 Passive Subwoofer
F Front Speaker
C Center Speaker
R Rear Speaker
B Back Speaker
Color
(B) Black
(BR) Brown
(C) Cherry
(G) Gold
(GR) Green
(H) Gray
(K) Black
(L) Blue
(LB) Light Blue
(M) Wood
(O) Orange
(P) Pink
(R) Red
(S) Silver
(V) Violet
(W) White
(Y) Yellow
Destination
J Japan
C North American
D USA
F Taiwan
S Brazil
Q Hong Kong
R China
A Australia
B United Kingdom
K Korea
L Russia
P Europe
U Worldwide
Speaker System (without AMP.) :
L Left channel
R Right channel
0 Center channel
File Name of Parts List File (EXCEL File)
PL_TX-SR343(B)MJJ.xlsx

Panel
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
Front Panel
Rear Panel
Remote Control Unit
Accessory
Front Panel / Rear Panel / Remote Control Unit
TX-SR444
RC-896M
Weight : 7.8 kg (17.2 lbs.) (North American and Taiwanese), 8.0 kg (17.6 lbs.) (Others)
Dimensions (W ×H ×D) : 435 mm ×160 mm ×328 mm, 17-1/8" ×6-5/16" ×12-15/16"
Indoor FM antenna --- (1)
AM loop antenna --- (1)
Remote controller (RC-896M) --- (1)
Batteries (AA/R6) --- (2)
Power cord (Taiwanese models) --- (1)
Speaker setup microphone --- (1)
The number in parenthesis indicates the quantity.
On packaging, the letter at the end of the product
name indicates the color.

Reset
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
COMMON
●How to reset:
Step1
While holding down CBL/SAT on the main unit (note that step 2 must be performed with
this button pressed down)
Step2
Press ON/STANDBY on the main unit. ("Clear" appears on the display and the unit returns
to standby.)
●Do not unplug the power cord until "Clear" disappears from the display.
●How to reset the remote controller:
Step1
While holding down RECEIVER on the remote controller, press Q until the remote
indicator stays lit (about 3 seconds).
Step2
Within 30 seconds, press RECEIVER again.
●リセット方法 :
1.
本体のCBL/SATボタンを押しながら（必ず押した状態で2.の操作を行ってください）
2.
本体のON/STANDBYボタンを押す（表示部に「Clear」が表示されてスタンバイ状態に
戻ります）
●表示部から「Clear」が消えるまで、絶対に電源コードを抜かないでください。
●リモコンのリセット方法 :
1.
リモコンのRECEIVERボタンを押しながら、リモートインジケーターが点灯するまでQボ
タンを3秒以上押す
2.
30秒以内にRECEIVERボタンをもう一度押すとリセットされる
How to Reset the Unit

Amp Diag Mode after Abnormal Conditions
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
COMMON
Protect Mode
The unit goes into standby automatically when detect the abnormal condition of thermal detection, dc voltage detection or current detection. (e.g. TX-SR343 block diagram below)
BACLA-1734
BAAF-1712
BAETC-1713
BAPS-1737
BAPRC-1758
MPU
Q7009
VOLTAGE
DRIVE
SPEAKER - OUT
RELAY
RL6600
(FL/FR)
Power amp.
(Front L)
Q6050
Q6060
P6080
SPRLF
THERMAL
DETECT
Q6300
POWER
TRANS.
T901
CURRENT
DETECT
Power
Supply
AC IN
M POWER M POWER
Relay
RL9001
FUSE
F9001 SEC-1
(HIGH)
SEC-1
(LOW) FUSE
F6401
F6402
RELAY
RL6430
RL6440
Power
Supply
(H)
(L)
(H)
or
(L)
SEC1H
IPRO
DC
DETECT
VPRO
IPROTECT
VPROTECT
VOLTAGE
DETECT
VOLH
VOLH
THERMAL
P501
P9002
P8002
P9011
SUB
TRANS. Power Supply for STANDBY
VPRO : DC voltage detection
IPRO : Current detection

Amp Diag Mode after Abnormal Conditions
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
COMMON
Self-diagnostics
This function is for avoiding the rupture of electrolytic capacitors with amplifier circuit
failure during power-ON.
Operation of Self-diagnostic
Self-diagnostic will start at the timing of next power on, after goes to the protect mode
by Current detection or DC voltage detection.
Only On/Standby key could work in this mode. Also remote control does not work.
However, the CLEAR operation is enabled.
During Self-diagnostic, the power supply for amplifier circuit become low voltage
state(SEC1-LOW), and the speaker relay will be turned off. Then, MPU will check each
amplifier circuits Internally by entering the test signal (20 kHz,-20 dBFS sine wave) to
each channel from DSP.
MPU will judge the amplifier circuit is good or not from VOLH value.
The normal range of VOLH value is 0.04 V < VOLH < 0.20 V.
If VOLH value is in the out of this range, it will be judged as NG (No good).
No problem found
When protected by current detection, and no problem found, "CHECK SP WIRE“ will be displayed.
In this State, Only the On/Standby key is effective. And if do not anything for3 minutes, unit goes
into standby automatically.
When protected by a DC voltage detection, and no problem found, unit goes into normal
operation.
Problem found
When judged as there is a problem on any channel, the information of channel that has a problem
will be displayed as in the right figure.
In this State, Only the On/Standby key is effective. Also remote control does not work. If do not
anything for 3 minutes, unit goes into standby automatically. This state will keep also after unit
turn on/off, or AC unplugged.
the power supply for amplifier circuit become low voltage state(SEC1-LOW), and the speaker
relay will be turned off.
Display of during Self-diagnostics
A M P D i a g M o d e
2 Line FL tube type
“Mode” This part display the channel which is currently checked. (E.g. "[FL]", etc.)
A M P D i a g M o d e
1 Line FL tube type
Display of when problem found
N G C H :
L C R S L S R B L B R
N G : L C R S L S R B L B R
2 Line FL tube type
1 Line FL tube type
L
C
R
S L
S R
B L
B R
Front L channel
Center channel
Front R channel
Surround L channel
Surround R channel
Surround back R channel
Surround back L channel

Amp Diag Mode after Abnormal Conditions
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
COMMON
Repair Process and How to Confirm
Confirmation of the protect cause
While NG channel is displayed, You can confirm the protect cause by following the step below.
1. Press the Enter button
2. The protect cause are displayed for 5 seconds.
Please check the around of those amplifier circuit and repair it.
Clear of NG CH information
After repair, you can clear NG CH information by following the steps below.
1. Press the On/Standby key while pressing the Enter key.
2. Display as in the right figure appears.
3. Unit goes into Standby automatically after 5 seconds.
Self-diagnostic will start again at the timing of next power on.
By this, You can verify whether repair was properly or not.
If problem found after repair, please re-check the around of its circuit.
Cancel of Self-diagnostic
You can cancel this mode by clear operation (press Standby key while pressing CBL/SAT key).
After cancel this mode, receiver will be started as normal operation.
Protected by current detection
Protected by DC Voltage detection
D E T . P R O T E C T : I
D E T . P R O T E C T : V
N G C H C L E A R
Clear of NG CH information

Model and Destination
5 4 3
2
1 6
D
C
A
B
D
C
A
B
5 4 3
2
1 6
How to check model and destination
TX-SR343/444/HT-R494
[TV] + [ON/STANDBY] → [DIMMER] or [RT/PTY/TP] → [TONE +] x 4
Model Name Destination FL Display
TX-SR343 DC S
R 3 4 3 D C 2 0 0 0
TX-SR343 DF S R 3 4 3 D F 0 0 0 0
TX-SR343 JJ S R 3 4 3 J J 4 0 0 0
TX-SR343 xx S R 3 4 3 x x 8 0 0 0
TX-SR444 DC S R 4 4 4 D C 2 2 0 0
TX-SR444 DF S R 4 4 4 D F 0 2 0 0
TX-SR444 xx S R 4 4 4 x x 8 2 0 0
HT-R494 DC R 4 9 4 D C 2 2 0 2
HT-R494 xx R 4 9 4 x x 8 2 0 2

Firmware
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
How to check Firmware Version & Preparation of Update
TX-SR343/444/HT-R494
Step1 : [TONE +] + [ON/STANDBY] x 2
Main Firmware Version will appear on the main unit’s display.
Step2 : [TONE +]
DSP Firmware Version will appear on the main unit’s display.
Step3 : [TONE +]
VIDEO Firmware Version will appear on the main unit’s display.
Step5 : [TONE +]
OSD Firmware Version will appear on the main unit’s display.
[Preparation of Update]
1. Connect the MMC storage device to your PC. If there is any data in the MMC storage
device, remove it.
2. Download the firmware file (package file) from the Onkyo FTP-server. However European
service partners should download the firmware file (package file) from the ExtraNet.
Onkyo FTP-server:ftp://manex.onkyo.co.jp/
ID and Password are those we informed when changed.
Filename is as follows:ONKAVR001A_****************.zip
Unzip the downloaded file. A following file is created.
ONKAVR001A_************.of1
ONKAVR001A_************.of2
ONKAVR001A_************.of3
ONKAVR001A_************.of4
ONKAVR001A_************.of5
3. Copy it to the MMC storage device. Be careful not to copy the zip file.
4. Remove the MMC storage device from your PC. And insert MMC card to MMC card
JIG(0J34).

Firmware
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
How to Update (service mode) 1/2
TX-SR343/444
HT-R494
Overwriting is also possible.
1. Connect the MMC card JIG(0J34) with MMC card that is already all firmware in it to JIG
port on the unit.
2. Turn on the unit. It takes some time to start after you switch on the unit.
3. Press [RETURN] button, Then it is displayed as below
If you need each module of the firmware update, you can select the module by pressing
PRESET <and >button.
MMC -> ALL: ALL firmware update (default)
MMC -> DSP: DSP firmware update
MMC -> OSD: OSD firmware update
MMC -> VMPU: Video MPU firmware update
MMC -> MMPU: Main MPU firmware update
MMC -> WORK: Compare between AVR and MMC, Only update new version firmware
The default setting is “ ALL”
CAUTION: When you will update each module firmware,
you have to keep combination of firmware.
4. Press [ENTER] button. Start update firmware.
MMC card JIG 0J34

Firmware
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
How to Update (service mode) 2/2
5. Wait until update is completed. When the update ends, “Completed!” is displayed. When
“ Completed!” message appeared, you can power off by pressing “ ON/STANDBY” button.
(If you leave it, it automatically turns standby mode. )
6. Press [ON/STANDBY] button, and the unit turns on.
7. Check the new FW version number.
<Note>
If the procedure might not be successful, please select “MMC -> ALL”.
TX-SR343/444
HTR-494

Hookup and Setting
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
No Sound
■No sound from connected player
□Chose input selector which is assigned to connected input terminal ?
□Isn’t muting on ?
■No sound from connected TV
□Chose wrong input selector ?
□Connect to this model’s HDMI OUT terminal from TV by HDMI cable ?
□When TV supports ARC function, connect to his model’s HDMI OUT terminal from
TV’s HDMI input terminal for ARC function ?
□When TV doesn’t support ARC function, connect TV to this model with optical cable
etc. ?
□Isn’t muting on ?
■No sound from some connected loudspeaker(s)
□No sound loudspeaker(s) config is enabled ?
■No sound from all connected TV or Blu-ray player etc.
□After chose loudspeaker volume level setting, test tone is OK ?
■No problem about above items
□Unplug power cord
After 10 seconds, connect power cord again
□Reset this model
COMMON

Hookup and Setting
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
No Picture
■In general
□Connection cable is bent , twisted or damaged ?
□Input is switched on TV ?
■No picture from connected player by HDMI input terminal
□Chose input selector which is connected to player ?
□Listening mode is not Pure Audio ?
□Don’t use HDMI-DVI adaptor. From personal computer ?
■No picture from connected player by component video terminal
□Output to TV connected to component video out terminal from player's picture
connected to the composite video input terminals ?
■No problem about above items
□Unplug power cord
After 10 seconds, connect power cord again
□Reset this model
COMMON

Hookup and Setting
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
No Power
■In general
□Doesn't be connection cable bent, be it twisted and be it damaged?
■There is time when indication on the front panel doesn't just light up.
□Please check the connecting cord of a DISPLAY PCB.
■No problem about above items
□Unplug power cord
After 10 seconds, connect power cord again
□Reset this model
COMMON

5 4 3
2
1 6
D
C
A
B
D
C
A
B
5 4 3
2
1 6
Trouble Shoot
Here the trouble shoot which focuses on the hardware troubles regarding PCB assembly is explained.
Of course, with actual repair there are also troubles due to damaged Power Transformer, Wiring, soldering etc. in addition to PCB assembly.
No Sound (HDMI in)
TX-NR609
TX-SR343/444/HT-R494
Process Check Point Damaged PCB
1 P2801B (BAPRC-1758)
●No.2 pin : +15V BAVD-1735
2 P2800B (BAPRC-1758)
●No.7 pin : +3.3V BAPRC-1758
3 R6690 (BAAF-1712)
●: +21.5V BAAF-1712
4
J4036, J4000 (BAAF-1712)
●J4000 : +15V
●J4036 : -15V
BAAF-1712
5 P8002A (BAPRC-1758)
●No.11 pin : +3.2V BAAF-1712
6
P8002A (BAPRC-1758)
●No.2 pin : Check signal
●No.4 pin : Check signal
BAPRC-1758
7 J4051 (BAAF-1712)
●: Check signal BAAF-1712
8
Q6050, Q6060 (BAAF-1712)
Check signal
●Q6050(base) : Check signal
●Q6060(base) : Check signal
BACLA-1734
9 BAAF-1712
No Good
OK
No Good
OK
No Good
OK
No Good
OK
No Good
OK
No Good
OK
No Good
OK
No Good
OK
BAPRC-1758
BAAF-1712
BACLA-1734
BAVD-1735
●Each voltage is shown as the reference value.
Value error : Plus or minus 15%

5 4 3
2
1 6
D
C
A
B
D
C
A
B
5 4 3
2
1 6
Trouble Shoot
Here the trouble shoot which focuses on the hardware troubles regarding PCB assembly is explained.
Of course, with actual repair there are also troubles due to damaged Power Transformer, Wiring, soldering etc. in addition to PCB assembly.
Process Check Point Damaged PCB
1 P2801B (BAPRC-1758)
●No.2 pin : +15V BAVD-1735
2 P2800B (BAPRC-1758)
●No.7 pin : +3.3V BAPRC-1758
3 R6690 (BAAF-1712)
●: +21.5V BAAF-1712
4
J4036, J4000 (BAAF-1712)
●J4000 : +15V
●J4036 : -15V
BAAF-1712
5 P8002A (BAPRC-1758)
●No.11 pin : +3.2V BAAF-1712
6 P2800B (BAPRC-1758)
●No.1 pin : signal BAPRC-1758
7
P8002A (BAPRC-1758)
●No.2 pin : signal
●No.4 pin : signal
BAPRC-1758
8 J4051 (BAAF-1712)
●: signal BAAF-1712
9
Q6050, Q6060 (BAAF-1712)
●Q6050(base) : signal
●Q6060(base) : signal
BACLA-1734
10 BAAF-1712
No Good
OK
No Sound (Opt in)
TX-NR609
TX-SR343/444/HT-R494
No Good
OK
No Good
OK
No Good
OK
No Good
OK
No Good
OK
No Good
OK
No Good
OK
No Good
OK
BAPRC-1758
BAAF-1712
BACLA-1734
BAVD-1735
●Each voltage is shown as the reference value.
Value error : Plus or minus 15%

5 4 3
2
1 6
D
C
A
B
D
C
A
B
5 4 3
2
1 6
Trouble Shoot
Here the trouble shoot which focuses on the hardware troubles regarding PCB assembly is explained.
Of course, with actual repair there are also troubles due to damaged Power Transformer, Wiring, soldering etc. in addition to PCB assembly.
No Sound (Analog in)
TX-NR609
TX-SR343/444/HT-R494
Process Check Point Damaged PCB
1 R6690 (BAAF-1712)
●: +21.5V BAAF-1712
2
J4036, J4000 (BAAF-1712)
●J4000 : +15V
●J4036 : -15V
BAAF-1712
3 P8002A (BAPRC-1758)
●No.11 pin : +3.2V BAAF-1712
4 J4051 (BAAF-1712)
●: signal BAAF-1712
5
Q6050, Q6060 (BAAF-1712)
●Q6050(base) : signal
●Q6060(base) : signal
BACLA-1734
6 BAAF-1712
No Good
OK
No Good
OK
No Good
OK
No Good
OK
No Good
OK
BAPRC-1758
BAAF-1712
BACLA-1734
●Each voltage is shown as the reference value.
Value error : Plus or minus 15%

5 4 3
2
1 6
D
C
A
B
D
C
A
B
5 4 3
2
1 6
Trouble Shoot
Here the trouble shoot which focuses on the hardware troubles regarding PCB assembly is explained.
Of course, with actual repair there are also troubles due to damaged Power Transformer, Wiring, soldering etc. in addition to PCB assembly.
No Picture (HDMI in/ out)
TX-SR343
TX-SR343/444/HT-R494
Process Check Point Damaged PCB
1 P2801B (BAPRC-1758)
●No.2 pin : +15V BAVD-1735
2 BAPRC-1758
BAPRC-1758 BAVD-1735
No Good
OK
●Each voltage is shown as the reference value.
Value error : Plus or minus 15%

5 4 3
2
1 6
D
C
A
B
D
C
A
B
5 4 3
2
1 6
Trouble Shoot
Here the trouble shoot which focuses on the hardware troubles regarding PCB assembly is explained.
Of course, with actual repair there are also troubles due to damaged Power Transformer, Wiring, soldering etc. in addition to PCB assembly.
No Picture (Component in/ HDMI out)
TX-SR343
TX-SR343/444/HT-R494
Process Check Point Damaged PCB
1 P2801B (BAPRC-1758)
●No.2 pin : +15V BAVD-1735
2 P2800B (BAPRC-1758)
●No.11 pin : +5V BAPRC-1758
3
P2800B (BAPRC-1758)
●No.13 pin : signal
●No.15 pin : signal
●No.17 pin : signal
BAVD-1735
4 BAPRC-1758
BAPRC-1758 BAVD-1735
No Good
OK
No Good
OK
No Good
OK
●Each voltage is shown as the reference value.
Value error : Plus or minus 15%

5 4 3
2
1 6
D
C
A
B
D
C
A
B
5 4 3
2
1 6
Trouble Shoot
Here the trouble shoot which focuses on the hardware troubles regarding PCB assembly is explained.
Of course, with actual repair there are also troubles due to damaged Power Transformer, Wiring, soldering etc. in addition to PCB assembly.
No Picture (Component in/ HDMI out)
TX-SR343
TX-SR343/444/HT-R494
Process Check Point Damaged PCB
1 P2801B (BAPRC-1758)
●No.2 pin : +15V BAVD-1735
2 P2800B (BAPRC-1758)
●No.11 pin : +5V BAPRC-1758
3 P2800B (BAPRC-1758)
●No.17 pin : signal BAVD-1735
4 BAPRC-1758
BAPRC-1758 BAVD-1735
No Good
OK
No Good
OK
No Good
OK
●Each voltage is shown as the reference value.
Value error : Plus or minus 15%