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HT-R640
Ref. No. 3951
082006
SERVICE MANUAL
AV RECEIVER
MODEL HT-R640 ON/STANDBY REMOTE MODE
RECEIVER
TAPE
DVD
INPUT SELECTOR M D/CDR
1 2 3 CD
HDD
V1 V2 V3
4 5 6 TV
V4 MULTI CH DVD
7 8 9 VCR
TAPE TUNER CD
CABLE
10 11 12
+10 0 CLR SAT
D TUN ENT
--/--- DIMMER SLEEP
CH
TV VOL DISC VOL
ALBUM
INPUT
GUIDE PREVIOUS
TOP MENU MENU
MUTING
ENTER
PLAYLIST/CAT PLAYLIST/CAT
RETURN SETUP
LISTENING MODE
STEREO SURROUND
AUDIO SUBTITLE RANDOM REPEAT
TEST TONE CH SEL LEVEL- LEVEL+
PLAY MODE
DISPLAY AUDYSSEY L NIGHT CINE FLTR
VCR DVD HDD
HT-R640
RC-668M
RC-668M(MDD)
RC-669M(MPP)
HT-R640 Black, Silver models
B MDD 120V AC, 60Hz
S MPP 230-240V 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.
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.
: HT-R640 USA model
: HT-R640 European model
REF NO. PART NAME DESCRIPTION PART NO. REMARKS
F901 FUSE 10A-UL/T-233 252330GR !,
F901 or FUSE 10A-T/UL-ST2 252333GR !,
F901 FUSE 5A-SE-EAK 252078GR !,
F901 or FUSE 5A-SE-TL250V 252278GR !,
F903 FUSE 5A-UL/T-233 252326GR !,
F903 or FUSE 5A-T/UL-ST2 252258GR !,
F903 FUSE 2.5A-SE-EAK 252075GR !,
F903 or FUSE 2.5A-SE-TL250V 252275GR !,
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 !
2. To initialize the unit
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 " Clea r " is displayed, the preset memory and each mode stored in the memory are initialized and will return to
the factory settings.
3. To check the version of microprocessor
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.
Ex.
Ma in1.0 1 /05305A
2. Press the STANDBY/ON button to Power off.
4. Memory Backup
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.
HT-R640
OPERATION CHECK-1
SPEAKER PROTECT-1 (DC VOLTAGE DETECTION)
[When]
1. Exchange power transistors (Q6050 - Q6054, Q6060 - Q6064).
2. Exchange amplifier PC board ass'y (NAAF-8911).
[Procedure]
No load. No input.
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.
Test - _ Blinks
2. Press the VIDEO 3 button, while the characters of " Test - _ " are displayed.
The unit will be in the state of " Test-4-00 ".
Test - 4 -00
3. Repeatedly press TONE+ button until the characters of " Test-4-21 " are displayed.
Test - 4 -21
Check whether the operation starts and continues automatically as follows.
Test - 4 -21
Front L ch
Check
P rote ct OK T e s t - 4 -2 5
Surround R ch
P ro t e c t O K Check
Test - 4 -22
Front R ch
Check
P rote ct OK P ro t e c t
Test - 4 -23
Center ch
Check
P rote ct OK
Test - 4 -24
Surround L ch
Check
P rote ct OK
If all channels are OK, the characters of " Test - 4 - 35 " are displayed.
Test - 4 -35
4. Press the STANDBY/ON button.
Turn off
Clear
HT-R640
OPERATION CHECK-2
SPEAKER PROTECT-2 (CURRENT DETECTION)
[When]
1. Exchange power transistors (Q6050 - Q6054 Q6060 - Q6064.
2. Exchange amplifier PC board ass'y (NAAF-8911).
[Procedure]
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.
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.
Te st - _ Blinks
2. Press the VIDEO 3 button, while " Test - _ " is displayed.
The unit will be in the state of " Test-4-00 ".
Te st - 4-0 0
3. Repeatedly press TONE + button until " Test-4-35 " is displayed.
Te st - 4-3 5
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.
Te st - 4-3 5
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.
P ro tect
Disconnect the dummy load immediately after checking the display of " Protect ".
Te st - 4-3 5
6. Check other channels according to the same procedure as 4 and 5.
7. Press the STANDBY/ON button.
Turn off
Clear
HT-R640
OPERATION CHECK-3
CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR)
[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).
[Procedure]
No output. No input.
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.
Te st - _ Blinks
2. Press the VIDEO 3 button while " Test - _ " is displayed.
The unit will be in the state of " Test-4-00 ".
Te st - 4-0 0
3. Repeatedly press TONE + button until " Test-4-37 " is displayed.
Te st - 4-3 7
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.
FM STEREO
Te st - 4-3 7
5. Press the STANDBY/ON button.
Turn off
Clear
Thermal sensor
1. Press and hold down the DISPLAY button, then press the STANDBY button when the unit is power ON.
" V er . 0. 50 /0 5 1 3 1 a " is displayed only for 2 seconds.
V er. 0 .50/0 5 1 3 1 a
2. Press the TONE button while " Ver.0.50/05131a " is displayed.
T: 2 5 C/ 7 7 F
3. Confirm that the displayed temperature is within +/-20 degree C from the ambient temperatures.
4. Press STANDBY/ON button.
Turn off
Clear
HT-R640
OPERATION CHECK-4(1/2)
DSP DEBUG MODE
The operation of DSP is able to checked by the information displayed on FL in this debug mode.
This information will help to pursue the cause of trouble.
To set in DSP debug mode
1. Press and hold down the DISPLAY button, then press the STANDBY button while the unit is power ON.
The version number of microprocessor is displayed only for 2 seconds.
V er. 0 .50/0 5 1 3 1 a
1. Press the TONE+ button within 2 seconds above, the version number of DSP is displayed.
DS P :0 6 4 2 1 A
2. Press the DISPLAY button while " DSP :06421A" is displayed. The status of DSP and DIR will be displayed.
E 1A 48K 0N/OF F P o O
To exit
Press STANDBY/ON button.
Content of display
1 2 3 4 5 6 7 8 9 10 11
-------------------------------- DIR ------------------------------------ ------------------ DSP --------------------
1 UNLOCK 4 Sampling Frequency 7 DSP Port
E = UNLOCK and Emphasis 0 = NIC (Normal state)
= LOCK 32K = 32 kHz without Emphasis 1 = DEC
44K = 44.1 kHz without Emphasis 2 = BUSY (Abnormal state)
2 Digital Selector 48K = 48kHz without Emphasis 3 = EXEC WAIT
0 = None
64K = 64 kHz 8 DSP Sequence
1 = OPT 3
2 = OPT 2 88K = 88.2 kHz 04 = Boot
3 = OPT 1 96K = 96 kHz 11 = Restart
4 = COAX 1 176 = 176.4 kHz FF = Free
5 = COAX 2 192 = 192 kHz
32e = 32 kHz with Emphasis 9 DSP Detect Format
6 = HDMI
44e = 44.1 kHz with Emphasis P = PCM (Analog)
7 = FRONT
48e = 48 kHz with Emphasis D = Dolby Digital
d = DTS
3 DIR Status 5 CODEC CLOCK MODE A = AAC
D = Digital N = Normal
? = UNKNOWN
A = Analog U = Up Sampling
M= Multich H = High Sampling (Double Rate) 10 DSP Decode
P = Multich PCM D = Down Sampling o = Decode OK
p = PCM Fixed Q = Quad Rate x = Decode NG
d = DTS Fixed
6 DIR Detect Type
------- Main Micro Processor --------
0 = Analog
1 = PCM 11 Mute
2 = Not PCM 0 = Selector IC(Q5501)
3 = Data 1
4 = DTS CD (Not used) 2 = DSP(Q201)
5 = Multich 3 = DIR(Q301)
6 = Not Decided
HT-R640
OPERATION CHECK-4(2/2)
DSP DEBUG MODE
Trouble Cause Analysis by Debug Mode
This debug mode will help in digital audio no sound trouble.
Check information on FL display and the related devices or circuits.
Digit no. Symptom on display Cause Check
on FL
1 "E" is displayed No input signal to DIR Related devices from digital input to Q301
4 Displayed freq. is different No input signal to DIR Related devices from digital input to Q301
from input
6 Displayed format is different No input signal to DIR Related devices from digital input to Q301
from input
8 "04" or "11" do not change ROM or RAM error Q281, Q282 & related devices
to "FF"
9 Displayed format is different Input signal to DSP is no good Related devices from Q301 to Q201
from input
10 "x" is displayed Interface between DSP and Related devices from Q701 to Q201
Micro processor is no good
11 This identifies IC which IC outputs error to main Q5501, Q201, Q301 & related devices
outputs error micro processor
HT-R640
EXPLODED VIEWS-1 A061
x 6 pcs.
U21
P901 A097 A044 A102
x 38 pcs. A093 A002
U13 P101
A037 U010
A044 A051
A060
U12
A002 A109
U14 DD Only
A002
A002 Refer to A022
in
EXPLODED VIEWS-2 A052
U19 A002 P701
x 2 pcs. A053
F6902
F6901 A051
U11 U10
U15 A002
F901 A013 A050 A002
F901C F903C x 4 pcs. A018 x 2 pcs.
A002 x 2 pcs.
F903 U17
A030 U18 A016 x 7 pcs. U09
U16 x 4 pcs. A040 U05
A031 A044 A042 A001
A028 A050 A062
F910C A033 A045 A016x 2 pcs.
U04 T901 A041
A045 A016 A055
x 2 pcs. A073
U03
F910 A050
A016 A112
x 2 pcs. x 4 pcs.
A016
A002
A015 x 2 pcs. U01
U02
A065
A035 x 4 pcs. A070
A017 A002 A051 A110
x 2 pcs. x 4 pcs. A002 A081
A066 x 5 pcs. A077
HT-R640
x 4 pcs.
A016
A020 A021 U06 A089
x 2 pcs. x 4 pcs. x 3 pcs.
HT-R640
EXPLODED VIEWS-2
Q6050B
x 4 pcs.
A049
x 10 pcs.
Q6054
Q6064
Q6053
Q6063
Q6052
Q6062
Q6051
Q6061 Q6050A
Q6050 x 2 pcs.
Q6060
HT-R640
HT-R640
A B C D E F G H
BLOCK DIAGRAM-1
AUDIO SECTION FM/AM TUNER UNIT
40
Q5501 R2S15211FP
5 CH HEADPHONES
L 59
POWER
MAIN R
MAIN L
SUB R
SUB L
1 XM-RADIO
DD ONLY
R 60
AMPLIFIER
XM ANTENNA 17
UNIT FL
L 63 TONE +29dB
DAC
XM/DT IC
AK4384
37 16 LEFT
+
R 64 FRONT SPEAKERS
36 19
FR
+29dB
TONE
65
20
RIGHT
74
25k
+
66
7 C
INVERTING +29dB
35
CENTER SPEAKER
25k
FRONT L 61
6
VIDEO 4 IN R 73
25k
+
62
INVERTING +29dB
L 34 14 LEFT
CD
25k
57
R 15
PREOUT SURROUND SPEAKERS
75
SW
2
25k
+
L 58 +29dB
TAPE OUT SUB RIGHT
30
R 12 WOOFER
25k
55 SL
11
L 78
25k
+
TAPE IN R 56 SR
9
33
25k
L 53
VIDEO 3 IN 10
R 77
25k
+
54
L 32 4
VIDEO 2 OUT
25k
51
R
76 5
25k
L 52
VIDEO 2 IN 31 2
R
25k
HP DET
49
CSRL
L
AMUT
1
FRL
80
VIDEO 1 OUT
25k
3 R 50
29
25k
L 47
REC R
REC L
VIDEO 1 IN 79
R
25k
48
FL 28
MULTI CHANNEL
25k
45
FR
INPUT
DVD
C 46
SW
71
38
SL
72
SR 39
69
70
4
COAX 1 67
FLASH ROM SD RAM
COAX 2 RI
RI
SR
SL
FR
SW
FL
INTERFACE
C
68
4M Bit 16M bit
FRONT OPT
OPT 1
117
116
OPT 2
LPF
LPF
LPF
LPF
LPF
LPF
115 Q701
113 M30627FHPGP
16 DSP
22
OPT 3
27
21
35
28
26
23
MAIN MICRO
29
20
34
33
32
36
30
31
37
15
- 14 2ch ADC
TMS320DA707 PROCESSOR
13
OPT OUT -
62
63
120
141
139
64
135
137
138
49
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