ONKYO HT-R640 Service Manual

Cover page of ONKYO HT-R640 Service Manual

Service Manual for ONKYO HT-R640, downloadable as a PDF file.

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HT-R640
SERVICE MANUAL
Ref. No. 3951
082006
AV RECEIVER
MODEL
HT-R640
HT-R640
Black, Silver models
230-240V AC, 50Hz
S MPP
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.
B MDD
120V AC, 60Hz
RC-668M(MDD)
MUTING
PREVIOUS
MENU
GUIDE
TOP MENU
SETUP
RETURN
PLAYLIST/CAT
PLAYLIST/CAT
RANDOM
SUBTITLE
PLAY MODE
AUDIO
REPEAT
RC-
668M
--/---
TAPE
M D/CDR
HDD
CABLE
ON/STANDBY
DIMMER
ENT
D TUN
SLEEP
10
11
12
INPUT SELECTOR
HDD
DVD
VCR
REMOTE MODE
V
1
V
4
V
2
V
3
CD
TAPE
TUNER
DVD
MULTI CH
LISTENING MODE
TV
DISPLAY
TEST TONE
CH SEL
SURROUND
STEREO
CINE FLTR
LEVEL+
LEVEL-
L NIGHT
VOL
VOL
SAT
VCR
TV
DVD
RECEIVER
CD
INPUT
+10
0
CLR
12
3
45
6
789
ENTER
CH
DISC
ALBUM
AUDYSSEY
RC-669M(MPP)
HT-R640
background image
HT-R640
SERVICE MANUAL
Ref. No. 3951
082006
AV RECEIVER
MODEL
HT-R640
HT-R640
Black, Silver models
230-240V AC, 50Hz
S MPP
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.
B MDD
120V AC, 60Hz
RC-668M(MDD)
MUTING
PREVIOUS
MENU
GUIDE
TOP MENU
SETUP
RETURN
PLAYLIST/CAT
PLAYLIST/CAT
RANDOM
SUBTITLE
PLAY MODE
AUDIO
REPEAT
RC-
668M
--/---
TAPE
M D/CDR
HDD
CABLE
ON/STANDBY
DIMMER
ENT
D TUN
SLEEP
10
11
12
INPUT SELECTOR
HDD
DVD
VCR
REMOTE MODE
V
1
V
4
V
2
V
3
CD
TAPE
TUNER
DVD
MULTI CH
LISTENING MODE
TV
DISPLAY
TEST TONE
CH SEL
SURROUND
STEREO
CINE FLTR
LEVEL+
LEVEL-
L NIGHT
VOL
VOL
SAT
VCR
TV
DVD
RECEIVER
CD
INPUT
+10
0
CLR
12
3
45
6
789
ENTER
CH
DISC
ALBUM
AUDYSSEY
RC-669M(MPP)
HT-R640
background image
HT-R640
SERVICE PROCEDURE
1. Replacing the fuses
This symbol located near the fuse indicates that the
fuse used is show 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 utilise est e lent.
Pour une protection permanente, n'utiliser que des fusibles de meme
type. Ce demier est indique la qu le present symbol est apposre.
2. To initialize the unit
The AV receiver uses a battery-less memory backup system in order to retain radio presets and other settings
when it's unplugged or in the case of a power failure.
Although no batteries are required, the AV receiver must be plugged into an AC outlet in order to charge the
backup system. Once it has been charged, the AV receiver will retain the settings for several weeks,
although this depends on the environment and will be shorter in humid climates.
1. Press and hold down the VIDEO 1/VCR 1 button, then press the STANDBY/ON button when the unit is Power on.
2. After " Clear " is displayed, the preset memory and each mode stored in the memory are initialized and will return to
the factory settings.
4. Memory Backup
Main microprocessor Q701 only.
1. Press and hold down the DISPLAY button , then press the STANDBY/ON button when the unit is Power on.
The version is displayed on FL display for 3 seconds.
2. Press the STANDBY/ON button to Power off.
3. To check the version of microprocessor
Main1.01/05305A
Ex.
REF NO.
PART NAME
DESCRIPTION
PART NO.
REMARKS
F901
FUSE
10A-UL/T-233
252330GR
!, <DD>
F901 or
FUSE
10A-T/UL-ST2
252333GR
!, <DD>
F901 or
FUSE
5A-SE-TL250V
252278GR
!, <PP>
F910
FUSE
5A-UL/T-233
252326GR
!
F910 or
FUSE
5A-T/UL-ST2
252258GR
!
F6901
FUSE
12A-TUL-250V
252301GR
!
F6902
FUSE
12A-TUL-250V
252301GR
!
<Notes>
<PP> : HT-R640 European model
<DD> : HT-R640 USA model
F901
FUSE
5A-SE-EAK
252078GR
!, <PP>
F903
FUSE
2.5A-SE-EAK
252075GR
!, <PP>
F903
FUSE
5A-UL/T-233
252326GR
!, <DD>
F903 or
FUSE
2.5A-SE-TL250V
252275GR
!, <PP>
F903 or
FUSE
5A-T/UL-ST2
252258GR
!, <DD>
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OPERATION CHECK-1
SPEAKER PROTECT-1 (DC VOLTAGE DETECTION)
1. Press and hold down the CD button, then press the STANDBY/ON button while the unit is Power ON.
" Test - _ " is displayed only for 5 seconds.
2. Press the VIDEO 3 button, while the characters of " Test - _ " are displayed.
The unit will be in the state of " Test-4-00 ".
3. Repeatedly press TONE
+ button until the characters of " Test-4-21 " are displayed.
[Procedure]
<Note>
No load. No input.
Test - _
Test - 4-00
[When]
1. Exchange power transistors (Q6050 - Q6054, Q6060 - Q6064).
2. Exchange amplifier PC board ass'y (NAAF-8911).
Test - 4-21
Check whether the operation starts and continues automatically as follows.
Test - 4-21
Test - 4-22
Test - 4-25
Test - 4-23
Test - 4-24
Protect OK
Protect OK
Protect
Protect OK
Protect OK
Protect OK
Test - 4-35
Clear
Turn off
Front L ch
Check
If all channels are OK, the characters of " Test - 4 - 35 " are displayed.
4. Press the STANDBY/ON button.
Front R ch
Check
Center ch
Check
Surround L ch
Check
Surround R ch
Check
Blinks
HT-R640
background image
OPERATION CHECK-2
SPEAKER PROTECT-2 (CURRENT DETECTION)
1. Press and hold down the CD button, then press the STANDBY/ON button while the unit is Power ON.
" Test - _ " is displayed only for 5 seconds.
2. Press the VIDEO 3 button, while " Test - _ " is displayed.
The unit will be in the state of " Test-4-00 ".
3. Repeatedly press TONE
+ button until " Test-4-35 " is displayed.
4. Connect the dummy load of 3 ohms to the Front L ch speaker terminal.
At this time, confirm that the speaker relay is not turned off.
5. Connect the dummy load of 1 ohm to the Front L ch speaker terminal.
At this time, confirm that the speaker relay is turned off and" Protect " is displayed.
Disconnect the dummy load immediately after checking the display of " Protect ".
6. Check other channels according to the same procedure as 4 and 5.
[Procedure]
<Note>
No input.
Do not check two or more channels at the same time.
Do not connect a dummy load to speaker terminal longer than 2 seconds.
Test - _
Test - 4-00
[When]
1. Exchange power transistors (Q6050 - Q6054 Q6060 - Q6064.
2. Exchange amplifier PC board ass'y (NAAF-8911).
Test - 4-35
Clear
Turn off
7. Press the STANDBY/ON button.
Test - 4-35
Protect
Test - 4-35
Blinks
HT-R640
background image
OPERATION CHECK-3
CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR)
Test - _
Test - 4-00
Test - 4-37
Clear
Turn off
Test - 4-37
FM STEREO
Blinks
Ver. 0.50/05131a
<Ex.>
<Ex.>
T: 25 C/ 77 F
Clear
Turn off
Output sensor
1. Press and hold down the CD button, then press the STANDBY/ON button while the unit is Power ON.
" Test - _ " is displayed only for 5 seconds.
2. Press the VIDEO 3 button while " Test - _ " is displayed.
The unit will be in the state of " Test-4-00".
3. Repeatedly press TONE
+ button until " Test-4-37 " is displayed.
4. At this time, confirm that the red characters of " FM STEREO " is displayed.
And, check relay RL6901 and RL6902 are turned off in 2 or 3 seconds.
5. Press the STANDBY/ON button.
[Procedure]
<Note>
No output. No input.
[When]
1. Exchange power transistors (Q6050 - Q6056, Q6060 - Q6066).
2. Exchange power amplifier PC board ass'y (NAAF-8911).
3. Exchange thermal sensor PC board ass'y (NAETC-8913).
Thermal sensor
1. Press and hold down the DISPLAY button, then press the STANDBY button when the unit is power ON.
" Ver. 0.50/05131a " is displayed only for 2 seconds.
2. Press the TONE button while " Ver.0.50/05131a " is displayed.
3. Confirm that the displayed temperature is within +/-20 degree C from the ambient temperatures.
4. Press STANDBY/ON button.
HT-R640

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