Onkyo HT-R495 User manual

Published by Onkyo & Pioneer Corporation Global CS Department 2019
For details, refer to "Important Check Points for good servicing".
Service Manual
Ref.No. : 4862
HT-R495
AV Receiver
Final Issue
HT-S5910(B) = HT-R495(B) + HTP-596(B)(SKF-596(B)+SKC-594(B)+SKR-594(B)+SKW-593(B))
HT-S5915(B) = HT-R495(B) + HTP-598(K)(SKF-596(K)+SKC-594(K)+SKR-594(K)+SKW-658(B))
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model Color Type Power Requirement Remarks
HT-R495 (B) – Black MDC AC 120 V Canada/USA
HT-R495 (B) – Black MMP AC 220 V to 240 V Europe
HT-R495 (B) – Black MMB AC 220 V to 240 V UK
HT-R495 (B) – Black MMT AC 220 V to 240 V Thailand
HT-R495 (B) – Black MMA AC 220 V to 240 V Australia/New Zealand
HT-R495
SKF-596 SKC-594
SKR-594
SKW-658
(For HT-S5915)
SKW-593
(For HT-S5910)

5432
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C
A
B
D
C
A
B
5432
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Common
Service Notes
Important Check Points for Good Servicing
In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.
1. Product safety
Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by following the safety instructions described in this manual.
1 Use specified parts for repair.
Use genuine parts. Be sure to use important parts for safety.
2 Do not perform modifications without proper instructions.
Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as radio/TV interference and foreign noise.
3 Make sure the soldering of repaired locations is properly performed.
When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity.
4 Make sure the screws are tightly fastened.
Please be sure that all screws are fastened, and that there are no loose screws.
5 Make sure each connectors are correctly inserted.
Please be sure that all connectors are inserted, and that there are no imperfect insertion.
6 Make sure the wiring cables are set to their original state.
Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.
7 Make sure screws and soldering scraps do not remain inside the product.
Please check that neither solder debris nor screws remain inside the product.
8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.
Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.
9 There should be no spark traces or similar marks on the power plug.
When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure connections and suitable usage.
Please exchange the power cord if necessary.
10 Safe environment should be secured during servicing.
When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.
Please pay attention to your surroundings and repair safely.
2. Adjustments
To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.
Also, No Adjustments should be performed in accordance without the procedures/instructions described in this manual, such as the tuner pack.
3. Lubricants, Glues, and Replacement parts
Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.
4. Cleaning
For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper cleaning should be performed to restore their performances.

5432
16
D
C
A
B
D
C
A
B
5432
16
Common
Service Notes
Service Notes
1. Safety-related component warning!!
Components identified by mark on the schematic diagram and by mark “!” in the parts list are critical for risk of fire and electrical
shock. Replace these components with ONKYO parts whose part numbers appear as shown in this manual.
2. Safety check after servicing
(1) To ensure safety, check that the covered insulating sheet or tube are removed, all parts and wires which are removed or
disconnected while servicing have been put back to their original positions after servicing.
(2) To insure structural integrity, check that all the screws or mechanical parts have been put back in their original positions after
servicing.
(3) Check that in the process of servicing or replacing parts that the surrounding area has not been contaminated or adversely affected.
(4) After servicing an insulation check on the external metal connectors and between the blades of the power plug must be performed.
Method of checking insulation resistance
Unplug the power cord and short the both ends of the plug with a jumper wire.
Using a 500V insulation resistance tester, check that the insulation resistance value between the plug of the power cord
and externally exposed metal parts is 1MΩ or greater.
※The mechanical power switch should be turned on if it is available.
3. Caution on replacing the battery
Danger of explosion if rechargeable batteries is incorrectly replaced. Replace only with the same or equivalent type recommended by the
manufacturer. When disposing of used batteries, please comply with governmental regulations or environmental public institution’s rules
that apply in your country / area.
4. Other Cautions
・When AC plug is non-polarized and if Main or Primary fuse enters in the Neutral line of AC Mains supply or if there is possibility of Main
or Primary Fuse entering in the Neutral line of AC Mains supply, then AC Mains supply must be disconnected to de-energize the circuit.
・Be sure to use only lead free solder.
・When soldering, please be careful not to use too much solder and affect adjacent components.
・When you repair the CD Player, Please do not stare into the beam in Optical Instruments and do not view directly since there is visible
and invisible laser radiation when open the unit.
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test
equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the
repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician.

5432
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C
A
B
D
C
A
B
5432
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Common
Note for Parts List
D AC 120 V
G AC 220 V to 230 V
H AC 220 V to 230 V / 240 V
J AC 100 V
L AC 100 V to 120 V
M AC 220 V to 240 V
P AC 230 V
U AC 100 V to 240 V
V AC 110 V to 240 V
W AC 120 V / 220 V to 240 V
Z※1
Speaker System (without AMP.) :
0 Passive Subwoofer
F Front Speaker
C Center Speaker
R Rear Speaker
B Back Speaker
A Australia
B United Kingdom
C North America
DUSA
FTaiwan
J Japan
K Korea
L Russia
P Europe
Q Hong Kong
R China
S Brazil
T Thai
U Worldwide
Speaker System (without AMP.) :
L Left channel
R Right channel
0 Center channel
Voltage Destination
When parts list is EXCEL file, please refer to the following explanation about file name.
P L _ T X – S R 3 4 3 ( B ) M J J . x l s x
ModelNo. Color
(X) Not related to color
(B) Black (M) Wood
(BR) Brown (O) Orange
(C) Cream (P) Pink
(G) Gold (R) Red
(GR) Green (S) Silver
(H) Gray (T) Titan
(K) Black (V) Violet
(L) Blue (W) White
(LB) Light Blue (Y) Yellow
Destination
Look at the rear panel serial number 6 digit.
○○○○○ J○○○○○○○○○○
Voltage
Look at the rear panel serial number 5 digit.
○○○○ J○○○○○○○○○○○
Color
File Name of Parts List File (EXCEL File)
※1 There is a charge function and a power supply (adapter) is needed, but an adapter isn't bundled.

5432
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D
C
A
B
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Common
Reset
【STORE】
[SETUP]+[ENTER]x2
【RESET】
1.[CBL/SAT]+[ON/STANDBY]
2.UnplugthepowercordfromAVRafterthedisappeared"Clear“ofFLtubeandAVRgoesstandby.
【RECALL】
[SETUP]+[RETURN]x2
DetailKeyOperationishere.
Reset

Diagnostic Function
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
TX-SR393/TX-SR494
HT-R398 / HT-R495
Protect Mode
The unit goes into standby automatically when detect the abnormal condition of thermal detection,
DC voltage detectionor current detection.(e.g. TX-SR393 block diagrambelow)
BACLA-2673
BAAF-2690
BAETC-2691
BAPS-2674
BAPRC-2695
MPU
Q7009
VOLTAGE
DRIVE
RELAY
RL6501
(FL/FR)
Poweramp.
(FrontL)
Q6001
Q6021
SPRLF
THERMAL
DETECT
Q6800
POWER
TRANS.
T901
CURRENT
DETECT
Power
Supply
ACIN
PON_MAIN
Relay
RL9001
FUSE
F9002 SEC-1
(HIGH)
SEC-1
(LOW) FUSE
F6901
F6902
RELAY
RL6911
RL6912
Power
Supply
(H)
(L)
(H)
or
(L)
PON_MAIN
SEC1H
IPRO
DC
DETECT
VPRO
VOLTAGE
DETECT
VOLH
VOLH
VPROTECT
IPROTECT
THERMAL
P6800A
P9002
P8002
P2800B
SUB
TRANS. PowerSupply
forSTANDBY VPRO: DC voltage detection
IPRO: Current detection
SPEAKER - OUT

Diagnostic Function
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
TX-SR393/TX-SR494
HT-R398 / HT-R495
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 problemfound
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 for 3 minutes, unit goes
into standbyautomatically.
When protected by a DC voltage detection, and no problem found, unit goes into normal
operation.
Problemfound
When judged as there is a problem on any channel, the information of channel that has a problem
will be displayed as in the rightfigure.
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 ACunplugged.
the power supply for amplifier circuit become low voltage state(SEC1-LOW), and the speaker
relay will be turnedoff.
Display of during Self-diagnostics
2 Line FL tube type
1 Line FL tube type
“Mode” This part display the channel which is currently checked.(E.g. "[FL]",etc.)
Display of when problem found
2 Line FL tube type
1 Line FL tube type
AMPDiagMode
AMPDiagMode
NGCH:
LCRSLSRBLBR
NG:LCRSLSRBLBR
Front L channel
Center channel
Front R channel
Surround L channel
Surround R channel
Surround back R channel
Surround back L channel
L
C
R
S L
S R
B L
B R

Diagnostic Function
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
TX-SR393/TX-SR494
HT-R398 / HT-R495
Repair Process and How to Confirm
Confirmation of the protectcause
WhileNG channelis displayed, You can confirm the protect cause by followingthe step below.
1. Press theEnterbutton
2. The protect cause are displayed for 5seconds.
Please check the around of those amplifiercircuitand repair it.
Clear of NG CH information
After repair, you can clear NG CH information by following the stepsbelow.
1. Press theOn/Standby key while pressing the Enterkey.
2. Display as in the right figureappears.
3. Unit goes into Standby automatically after 5seconds.
Self-diagnostic will start again at the timing of next power on.By this, You can
verify whether repair was properly ornot.
If problemfound after repair, pleasere-check the around of its circuit.
Cancel ofSelf-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 normaloperation.
Manual Execution ofSelf-diagnostic
1. [DIMMER] + [ON/STANDBY] x 2
Main Firmware Version will appear on the main unit’s display.
2. [SETUP] or[HOME]
Service Menu will appear on the main unit’sdisplay
3. Setup & select channel for self-diagnostic by enter service mode to “AMPChDiag”Display as in
the right figure appears. Select channel by cursor Left & Right.
4. [STANDBY/ON]
Unit will go into standby.
5. [STANDBY/ON]
Unit will turn on. Then self-diagnostic will start automatically
Protected by currentdetection
Protected by DC Voltagedetection
Clear of NG CH information
Manual Execution ofSelf-diagnostic
DET.PROTECT:I
DET.PROTECT:V
NGCHCLEAR
AmpChDiag:Off

Diagnostic Function
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
TX-SR393/TX-SR494
HT-R398 / HT-R495
1 I 8 0 F 3 0 D D
Enter Service mode, Service Information
How to enter to service mode.
Step1:
[DIMMER] + [ON/STANDBY] x 2
Step2:
[SETUP] or[HOME]
Step3:
Follow this Tree operation for each servicemode.
Displaying Service information
This service information display system is helpful in analyze the status when the unit goes into
Protect mode and is powered off. Pay attentionthat the status will change if a button is pushed.
Follow this Tree for “ProtectData” section at the “1-1 TechSprt”
Step1:
Whenthe [ENTER] button is pressed, It will show error history
Step2:
When the [ENTER] button during display error history,
the additional information of error history will be appeared.
How to change History No. 1 ~ 3.
[CURSOR LEFT] or [CURSOR RIGHT]
How to exit the service mode.
Please press the [ANY INPUT SELECTOR]
How to clear Protect Data
Step1:
Select “ProtectDataCLR” from this tree
Step2:
Press [ENTER]button
After display “DATA Cleared!”, It will be data reset and go to normal mode.
M1.xx / xxxxxAEx
The version of main
microprocessor. (displayed only for
3seconds)
1.Service
1 I 80F 30 DD
HistoryNo.
: 1 ~3
(1 islatest.)
PROTECT
I: Current Protect
V: Voltage Protect
T: ThermalProtect
Tempe-
rature Volume Value ListeningMode
See Thisvalue
1 01:23 10h Information Displayed
(Record thisInformation)
Time after Power on
xx :xx Cumulative operation time after Reset
: xx h
HistoryNo.
: 1 ~3
(1 islatest.)
[CURSOR LEFT] [CURSOR RIGHT]
[CURSOR LEFT] [CURSOR RIGHT]
1 01: 23 10h
2 01: 47 8h
3 00: 00 00h
2 I 9 1 F 2 7 D D
3 -0 0 F 0 0 A
T : 0 I : 2 V : 0 No Use
T : ThermalProtect
[ENTER]
Count of eachprotect
I : CurrentProtect
V : VoltageProtect
Normaldisplay
Protect DataCLR Clear:[ENTER]
DataCleared!

Diagnostic Function
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
TX-SR393/TX-SR494
HT-R398 / HT-R495
Service Information
Listening Mode Code List
00 NORMAL_LMD_BEGIN
01 LAST
02 PURE
03 DIRECT
04 STEREO
05 MONO
06 ORCHESTRA
07 UNPLUGGED
08 STUDIOMIX
09 TVLOGIC
0A ALLCHST
0B FULLMONO
0C TD
0D RPG
0E ACTION
0F ROCKBAND
10 SPORTS
11 WHOLEHOUSE
12 RPG_GENRE
13 ACTION_GENRE
14 ROCKBAND_GENRE
15 SPORTS_GENRE
12 NORMAL_LMD_END
20 SURR_LMD_BEGIN
21 SURR_20_PLII_MOVIE
22 SURR_20_PLII_MUSIC
23 SURR_20_PLII_GAME
24 SURR_20_PLIIX_MOVIE
25 SURR_20_PLIIX_MUSIC
26 SURR_20_PLIIX_GAME
27 SURR_20_PLIIZ
28 SURR_20_NEO6_MOVIE
29 SURR_20_NEO6_MUSIC
2A SURR_20_NEURAL_MUSIC
2B SURR_20_NEURAL_CINEMA
2C SURR_51_OFF
2D SURR_51_MTR
2E SURR_51_DSC
2F SURR_51_NEO6
30 SURR_51_EX
31 SURR_51_PLIIX_MOVIE
32 SURR_51_PLIIX_MUSIC
33 SURR_51_PLIIZ
34 SURR_51_NEURAL_CINEMA
35 SURR_20_NEOX_CINEMA
36 SURR_20_NEOX_MUSIC
37 SURR_20_NEOX_GAME
38 SURR_51_NEOX_CINEMA
39 SURR_51_NEOX_MUSIC
40 SURR_51_NEOX_GAME
41 SURR_20_DOLBY_SURR
42 SURR_51_DOLBY_SURR
43 SURR_LMD_END
48 DTSSS_LMD_BEGIN
49 DTSSS_20_NEO6_MUSIC
4A DTSSS_20_NEO6_CINEMA
4B DTSSS_51
4C DTSSS_LMD_END
50 THX_MUSIC_LMD_BEGIN
51 THX_20_PLII_MUSIC
52 THX_20_PLIIX_MUSIC
53 THX_20_PLIIZ_MUSIC
54 THX_20_NEO6_MUSIC
55 THX_20_NEURAL_MUSIC
56 THX_51_OFF_MUSIC
57 THX_51_MTR_MUSIC
58 THX_51_DSC_MUSIC
5A THX_51_PLIIX_MUSIC
5B THX_51_PLIIZ_MUSIC
5C THX_51_NEO6_MUSIC
5D THX_51_NEURAL_MUSIC
5E THX_20_NEOX_MUSIC
5F THX_51_NEOX_MUSIC
60 THX_20_DOLBY_SURR_MUSIC
61 THX_51_DOLBY_SURR_MUSIC
62 THX_MUSIC_LMD_END
70 THX_GAME_LMD_BEGIN
71 THX_20_PLII_GAME
72 THX_20_PLIIX_GAME
73 THX_20_PLIIZ_GAME
74 THX_20_NEURAL_GAMES
75 THX_51_OFF_GAMES
76 THX_51_MTR_GAMES
77 THX_51_DSC_GAMES
78 THX_51_PLIIX_GAME
79 THX_51_PLIIZ_GAMES
7A THX_51_NEO6_GAMES
7B THX_51_NEURAL_GAMES
7C THX_20_NEOX_GAMES
7D THX_51_NEOX_GAMES
7E THX_20_DOLBY_SURR_GAME
7F THX_51_DOLBY_SURR_GAME
80 THX_GAME_LMD_END
90
THX_CINEMA_LMD_BEGIN
91
THX_20_PLII_MOVIE
92
THX_20_PLIIX_MOVIE
93
THX_20_PLIIZ_CINEMA
94
THX_20_NEO6_MOVIE
95
THX_20_NEURAL_CINEMA
96
THX_51_OFF_CINEMA
97
THX_51_MTR_CINEMA
98
THX_51_DSC_CINEMA
99
THX_51_NEO6_CINEMA
9A
THX_51_PLIIX_MOVIE
9B
THX_51_PLIIZ_CINEMA
9C
THX_51_NEURAL_CINEMA
9D
THX_51_EX
9E
THX_20_NEOX_CINEMA
9F
THX_51_NEOX_CINEMA
A0
THX_20_DOLBY_SURR_CINEMA
A1
THX_51_DOLBY_SURR_CINEMA
A2
THX_CINEMA_LMD_END
B0
THX_U2GAME_LMD_BEGIN
B1
THX_20_PLII_SLCT2_GAME
B2
THX_20_PLIIZ_SLCT2_GAME
B3
THX_51_SLCT2_GAM
B4
THX_51_PLIIZ_SLCT2_GAME
B5
THX_U2GAME_LMD_END
B6
THX_U2MUSIC_LMD_BEGIN
B7
THX_51_SLCT2_MUS
B8
THX_51_PLIIZ_SLCT2_MUSIC
B9
THX_U2MUSIC_LMD_END
BA THX_U2CINEMA_LMD_BEGIN
BB THX_51_SLCT2_CIN
BC THX_51_PLIIZ_SLCT2_CINEMA
BD THX_U2CINEMA_LMD_END
D0
AUDYSSEY_LMD_BEGIN
D1
AUDYSSEY_20_PLII_MUSIC
D2
AUDYSSEY_20_PLIIX_MUSIC
D3
AUDYSSEY_20_NEO6_MUSIC
D4
AUDYSSEY_20_NEURAL_CINEMA
D5
AUDYSSEY_20_NEURAL_MUSIC
D6
AUDYSSEY_20_PLII_MOVIE
D7
AUDYSSEY_20_PLIIX_MOVIE
D8
AUDYSSEY_20_NEO6_MOVIE
D9
AUDYSSEY_20_PLII_GAME
DA
AUDYSSEY_20_PLIIX_GAME
DB
AUDYSSEY_51_OFF
DC
AUDYSSEY_51_PLIIX_MUSIC
DD
AUDYSSEY_51_PLIIX_MOVIE
DE
AUDYSSEY_51_NEO6
DF
AUDYSSEY_51_NEURAL_CINEMA
E0
// AUDYSSEY_51_NEURAL_MUSIC
E1
AUDYSSEY_51_EX
E2
AUDYSSEY_LMD_END
F0
SPECIAL_LMD_BEGIN
F1
TESTTONE
F2
TESTTHR
F3
TESTAUTO
F4
ASC
F5
FLASH
F6
DEBUGMODE
F7
FLASH2
F8
FLASH3
F9
FLASH4
FA
FLASH_CHECK
FB
SPECIAL_LMD_END

Firmware Update
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
TX-SR393/TX-SR494
HT-R398 / TX-SR292BT
HT-R495
How to check Firmware Version & Preparation of Update
Step1 : [INFO] + [ON/STANDBY] x 2
Main Firmware Version will appear on the main unit’s display.
Step2 : [Cursor UP +1]
DSP Firmware Version will appear on the main unit’s display.
Step3 : [Cursor UP +2]
Video Firmware Version will appear on the main unit’s display.
Step4 : [Cursor UP +3 ]
OSD Firmware Version will appear on the main unit’s display.
Step7 : [TONE +3 over]
Return to Display Main Firmware Version ( Return Step1)
When It is pushed Cursor Down, It is appeared before step.
[Preparation of Update]
1. Connect the USB storage device to your PC. If there is any data in the USB storage
device, remove it.
2. Download the firmware file (package file) from the OPSIS-server.
However European service partners should download the firmware file (package file)
from the ExtraNet.
ID and Password are those we informed when changed.
Filename is as follows: ONKAVR002B_Rxxx_xxx.zip for TX-SR393, HT-R398
Filename is as follows: ONKAVR002C_Rxxx_xxx.zip for TX-SR494, HT-R495
Filename is as follows: ONKAVR002B_Rxxx.zip for TX-SR292BT
Unzip the downloaded file. A following file is created.
AVR002B**************.of1 for TX-SR393, HT-R398
AVR002C**************.of1 for TX-SR494
AVR002B**************.of1 for TX-SR292BT
There is one file for update.
3. Copy it to the USB storage device. Be careful not to copy the zip file.
4. Remove the USB storage device from your PC.

Firmware Update
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
TX-SR393/TX-SR494
HT-R398 / TX-SR292BT
HT-R495
How to Update (service mode) 1/2
Overwriting is also possible.
1. Connect the USB storage to the USB port on the unit.
2. Turn on the unit. It takes some time to start after you switch on the unit.
Press: [DIMMER] + [ON/STANDBY] x 2
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.
It should be updated firmware by selecting USB -> ALL normally.
USB -> ALL: ALL firmware update ( default )
USB -> DSP1: DSP firmware update
USB -> OSD: OSD firmware update
USB -> VMPU: VMPU firmware update
USB -> MMPU: Main MPU firmware update
USB -> WORK: Compare between AVR and USB, 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.

Firmware Update
543
2
1 6
D
C
A
B
D
C
A
B
543
2
1 6
TX-SR393/TX-SR494
HT-R398 / TX-SR292BT
HT-R495
How to Update (service mode) 2/2
4. Press [ENTER] button. Start update firmware.
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 “USB -> ALL”.

5432
16
D
C
A
B
D
C
A
B
5432
16
HT-R495
Model and Destination
１．[ TV ] + [ ON/STANDBY ] → [ ENTER ] → [ TUNER UP/DOWN ] x 4
Model and Destination
Model Name Destination FL Display
HT-R495 DC R495 DC 0101
HT-R495 xx R495 xx 0111
HT-R495 xA R495 xA 0141

Check Idling Current
5432
16
D
C
A
B
D
C
A
B
543
2
16
HT-R495
a. Aging
The AVR is turned on about 6 minutes for aging.
b. Idling After-check
Channel FL,FR,C,SL,SR,SBL,SBR
Terminals P6021,P6022,P6023,P6025,P6026,P6027,P6028
*Connect 1/4W 100 ohms resisters in each probe of multi mater .
*If the measured value are under 1 mV or over 10 mV, you have to make sure repair.
How to Check Idling Current
BAAF-2690
When there is no measured connector on the board:
1. Measure by inserting a like thin pin into the hole of the connector for measurement.
2. Measure via connector as shown.

Hookup and Setting
5432
16
D
C
A
B
D
C
A
B
5432
16
Common
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

Hookup and Setting
5432
16
D
C
A
B
D
C
A
B
5432
16
Common
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

Hookup and Setting
5432
16
D
C
A
B
D
C
A
B
5432
16
Common
No Power
■ In general
□Check if the connection cable is bent or twisted, 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

5432
16
D
C
A
B
D
C
A
B
5432
16
Trouble Shoot
TX-SR292BT/SR393/SR494, HT-R398/R495
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.
P7001
BACLA-2673
BADIS-2672
BAPRC-2695
BAPS-2674
BAAF-2690
No Sound (HDMI in)
Process Check Point Damaged PCB
1
P2802 (BAPRC-2695)
BAPS-2674
2
P7002 (BAPRC-2695)
BAPRC-2695
3
(BAAF-2690)
BAAF-2690
4
(BAAF-2690)
BAAF-2690
5
P7002 (BAPRC-2695)
BAAF-2690
6
P7003 (BAPRC-2695)
BAPRC-2695
7
(BAAF-2690)
BAAF-2690
8
Q6001, Q6021 (BAAF-2690)
BACLA-2673
9 BAAF-2690
No Good
OK
3 ca. +3.3V (+3.3VDG)
12 ca. +3V (SPRLF)
1
Base Audio Signal (FL OUT, CLA-OUT)
J4101 Audio Signal (FL OUT, CLA-IN)
3 ca. +18V (+12VDG)
J4251 ca. +24V
J4187 ca. -15V J4188 ca. +15V
19 Audio Signal (DAC OUT)

5432
16
D
C
A
B
D
C
A
B
5432
16
Trouble Shoot
TX-SR292BT/SR393/SR494, HT-R398/R495
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.
P7001
BACLA-2673
BADIS-2672
BAPRC-2695
BAPS-2674
BAAF-2690
No Sound (Opt in)
Process Check Point Damaged PCB
1
P2802 (BAPRC-2695)
BAPS-2674
2
P7002 (BAPRC-2695)
BAPRC-2695
3
J4251 (BAAF-2690)
BAAF-2690
4
(BAAF-2690)
BAAF-2690
5
P7002 (BAPRC-2695)
BAAF-2690
6
P7003 (BAPRC-2695)
BAPRC-2695
7
P7003 (BAPRC-2695)
BAPRC-2695
8
(BAAF-2690)
BAAF-2690
9
Q6001, Q6021 (BAAF-2690)
BACLA-2673
10 BAAF-2690
No Good
OK
Base Audio Signal (FL OUT, CLA OUT)
J4101 Audio Signal (FL OUT, CLA IN)
25 Audio Signal (OPT IN)
19 Audio Signal (DAC OUT)
13 ca. +18V (+12VDG)
3 ca. +3.3V (+3.3VDG)
J4251 ca. +24V
J4187 ca. -15V J4188 ca. +15V
12 ca. +3V (SPRLF)