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HT-R500
Ref. No. 3728
042002
SERVICE MANUAL
AV RECEIVER
MODEL HT-R500
Black models
BMDD 120V AC, 60Hz
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-R500
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
F6901, 252198 or 8A-UL or
F6902 252261 8A-T/UL-ST2,Fuse
F901 252198 or 8A-UL or
252261 8A-T/UL-ST2,Fuse
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.
1.Press and hold down the VIDEO-1 button, then press the
STANDBY/ON button.
2.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
(Only U.S.A. model)
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 po wer 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 charge 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 average, 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.
HT-R500
EXPLODED VIEW
54
U31 17
P901 17
P101
U9 U22
31
U7
33
33
11 U1
54
U13 U23
U24
2
U12 2
12 16
17
Q6050 P7001
2
33 F6901
U10 P7503
F6902
U20 2
U3
F901 U6 1
9 55 10
2 2
13 51
9 U17 2 Q6064 2 U4
U11 5
U19
T901
U21 3
25
6 U5
24
21 2 52
21
53
22
HTR-500
22
8
23 53
23 56 8 7
HT-R500
CAUTION: Replacement for transistor of mark *, if necessary
EXPLODED VIEW must be made from the same beta group (hFE) as
the original type.
PARTS LIST
REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION
1 27111268 Front bracket P901 253332HIT or ! AS-UC-2 or
2 838130088 3TTB+8B,Self-tapping screw 253333VOL ! AS-UC-2,Power supply cord
5 27100416 Chassis Q6050~ 2203563, KTC5242-O,
*
6 27190503A KGLS-8RF,Holder Q6054 2202842, 2SC5242-R,
*
7 27190813 KGPS-10RF,Holder 2202843, * 2SC5242-O,
8 27190428A KGLS-10RF,Holder 2203562, KTC5242-R,
*
9 830440089 4TTC+8C(BC),Self-tapping screw 2203663, * MN130S-O,
10 880009 NRP-345,Plastic rivet 2203664 or * MN130S-Y or
11 27300750 ! Bushing,cord 2203666 * MN130S-P,Transistor
12 27160511 Heat sink Q6060~ 2203553, * KTA1962-O,
13 801433 3SMS8W.SW+14B(BC),Special screw Q6064 2202832, * 2SA1962-R,
16 28184831 Top cover 2202833, * 2SA1962-O,
17 838430088 3TTB+8B(BC),Self-tapping screw 2203552, * KTA1962-R,
21 27175319B Leg 2203673, * MP130S-O,
22 28141494 Cushion 2203674 or * MP130S-Y or
23 838130088 3TTB+8B,Self-tapping screw 2203676 * MP130S-P,Transistor
24 28325641 Knob, volume T901 2301624 ! NPT-1446D,Power transformer
25 28191957 Clear plate U1 1A928501-1F NADG-7401-1F,DSP circuit PC board ass'y
31 27122989A Rear panel U3 1A928503-1A NADIS-7403-1A,Display circuit PC board ass'y
33 838430088 3TTB+8B(BC),Self-tapping screw U4 1A928504-1A NASW-7404-1A,Standby switch PC board ass'y
51 27212402 Front panel U5 1A928505-1A NAETC-7405-1A,Headphone terminal PC board ass'y
52 28135244 Badge U6 1A928506-1A NAETC-7406-1A,Front video PC board ass'y
53 838430088 3TTB+8B(BC),Self-tapping screw U7 1A928507-1A NAETC-7407-1A,Connector PC board ass'y
54 29110083 Tape cloth U9 1A928509-2A NAAF-7409-2A, Power amplifier driver PC board ass'y
55 223024 AC238,Isolated plate U10 1A928510-2A NAETC-7410-2A,Regulator PC board ass'y
56 260208 Wire tie U11 1A928511-2A NAETC-7411-2A,Secondary PC board ass'y
F6901, 252198 or ! 8A-UL or U12 1A928512-2A NAETC-7412-2A,Speaker terminal PC board ass'y
F6902 252261 ! 8A-T/UL-ST2,Fuse U13 1A928513-2A NAETC-7413-2A,PC board for holder
F901 252198 or ! 8A-UL or U17 1A928517-2A NAAF-7417-2A,Power amplifier PC board ass'y
252261 ! 8A-T/UL-ST2,Fuse U19 1A928519-2A NAPS-7419-2A,Terminal PC board ass'y
P101 2047151512 NCFC7-151512,Flexible flat cable U20 1A928520-2A NAPS-7420-2A,Primary circuit PC board ass'y
P7001 2045102012 NCFC5-102012,Flexible flat cable U21 1A928521-2A NAPS-7421-2A,Terminal PC board ass'y
P7503 2047081012 NCFC7-081012,Flexible flat cable U22 1A928522-2A NAVD-7422-2A,Video terminal PC board ass'y
U23 1A928523-2A NAETC-7423-2A,PC board for holder
NOTE: THE COMPONENTS IDENTIFIED BY MARK ! U24 1A928524-2A NAETC-7424-2A,Thermal detector circuit PC board ass'y
HT-R500
ARE CRITICAL FOR RISK OF FIRE AND U31 240138A or ENG06501QR or
ELECTRIC SHOCK. REPLACE ONLY WITH
PART NUMBER SPECIFIED. 240134A TFCE1U114B,Tuner unit
HT-R500
A B C D
BLOCK DIAGRAM 1
To/From Main Microrocessor
BD3811K1
FM/AM
80 TUNER
PACK
VIDEO3
1 79 78
77
2 INPUT GAIN
1 0/6dB
CD
1
69
1 INPUT GAIN
72
TAPE-1 OUT 1 0/6dB
71 1
66
4
INPUT GAIN
TAPE-1 IN
3 0/6dB
43
6
INPUT GAIN
5
0/6dB
73 40
8
2 VIDEO-2 IN 74
7 INPUT GAIN
0/6dB
76 30
VIDEO-1 OUT
75 INPUT GAIN
S 0/6dB
10
33
VIDEO-1 IN
9
INPUT ATT
-6DB
23
21
26
25
28
27
24
22
12
1
DVD S
11 18 -1
NC +7V
BD3811 +
14 1 OPAMP
MLS/MRS 20 -1 9.97K 10K -7V -
13
NC BD3811
16 50KLPF 10K
C/SW L
3 15 10.5dB
17
19
P
50KLPF
R 10K
(1/2) AK4586
AK4586
COAXIAL 2CH A/D 10K
96/24 50KLPF 9.97K
SL
OPAMP
DIR CS493293
(MJJ ONLY) 96/24
OPTICAL 1 6CH D/A
AK4586 50KLPF
DSP SR
OPTICAL 2 OSC AK4586
CS493264
12.288MHZ
50KLPF
12.288MHZ
RST.CS.INTREQ
C
/CL/DA/SCDO
RST.CS/CL/DA
/CDTO/INT1.2.
+2.5V +5V 50KLPF
DSP SW
+3.3V +5V
CTLA/B
MEMORY
VIDEO3
VMUT1
VMUT2
4 COMPOSITE VIDEO INPUT LA7956
VIDEO2 COMPOSITE VIDEO OUT 12.5MHZ
VIDEO1 MONITOR OUT
MAIN
DVD 6dB VIDEO 1 MICRO
0dB PROCESSOR
UPD784225
AGC
C Y
LA7956
VIDEO 3 BACK UP
5MHZ
6dB
KEY
RN1441
C Y
SUBMICRO
VIDEO 2 PROCESSOR
S-VIDEO INPUT LA7956 UPD780232
C Y S-VIDEO OUTPUT FL DISPLAY
C Y GC-8BT
VIDEO 1 MONITOR OUT
6dB
STANDBY
REMOTE
5 DVD
C Y 0dB
C Y
SENSOR
VIDEO 1
0dB
HT-R500
A B C D
BLOCK DIAGRAM 2
1
MASTER
VOLUME
UT GAIN 0,,-103dB Power Amplifier
0/6dB OPAMP OUTPUT GAIN HEADPHONE
68 BASS/TREBLE BASSBOOST
0-18dB 2.2K
69 55
+27dB
47/16
GAIN
0/6dB OPAMP
65 BASS/TREBLE
L
66 OUTPUT GAIN 2.2K
0-18dB 57
+27dB R
47/16
GAIN
C
0/6dB OPAMP
42
OUTPUT GAIN 2.2K
43 0-18dB 38
+27dB SL
GAIN 47/16
SR
0/6dB OPAMP
39
OUTPUT GAIN SPBL
40
0-18dB 37 2.2K
2 GAIN 47/16
+27dB SPBR
0/6dB OPAMP
31 OUTPUT GAIN
30 0-18dB 35 2.2K
+27dB
47/16
GAIN
0/6dB OUTPUT GAIN C352
34 OPAMP 104Z
33 OPAMP SWPO
0-18dB R388
36 15dB
270 100 R385
P351
Q305
47/16 100
OR KRA102S
Q306
+7V
D3811 +12V AMUT
-7V -12V
BD3811
3
SPHP
VOLTAGE & PROTE
CURRENT
CTION
SENSOR
HPMUT
HPDET
SPCS
SPB
SELMUT
SPF
VOLTAGE
SELDA
SELCL
SENSOR
PRO
VOLH
SEC1H
POWER
SEC1H
CONTROL
T902
+5.6V
STANDBY
4 SEC1H RELAY
FUSE
+B1H
-27V
-VP POWER
SEC1
PRI RELAY AC IN
+12V +B1
VIDEO +B1L AC OUTLET
+12V
T901
AF/TU RELAY SEC2
+B2
-12V
AF
SEC3
+5V
Y
DSP/TU
FLAC
DISPLAY FL TUBE
FLAC
5
RI RI
INTERFACE
5
4
3
2
1
SP A
S7616
1.2K
R7615
NADIS-7403
U7501
U4
SP B
SPS4441E1
S7615
S7501
UDZ5.1B
D7502
820
*
C7515 C7516 R7582
220K
S7614
C7514 100/6.3
R7505
100K X 13
560
104Z 104Z
STANDBY
R7614 R7613
C7517 102J
RN2403
NASW-7404
D7503
*KRA103S
JL7501B
1SS352
A
59 F2
58 F2
Q7504
JL7501A 57 NP
S7647 S7637 S7627 SYSIN 56 NP
GND
KEY0
55 P35
R7532
54 P34
Display section
AUDIO TUNING< FM MODE
10K
ADJUST K0 53 P33
R7626
R7646
R7636
K1 52 P32
S7646 S7636 S7626 51 P31
2.2K
2.2K
2.2K
R7520 2.7K
R7507
R7506
50 P30
47K
C7508 102J