HT-R550
SERVICE MANUAL
SERVICE MANUAL
RC-681M
MASTER VOLUME
VIDEO
STANDBY
TONE
DISPLAY
Y
R
O
M
E
M
R
E
M
M
I
D
O
E
R
E
T
S
DIGITAL INPUT
TUNING MODE
A
B
SPEAKERS
TUNER
TAPE
DVD
MULTI CH
C D
SETUP
ENTER
SETUP MIC
RETURN
CLEAR
LISTENING MODE
AUDIO
L
R
STANDBY/ON
PHONES
TUNING
PRESET
AUX INPUT
AUX
CBL/SAT
VCR/DVR
MUTING
PREVIOUS
MENU
GUIDE
TOP MENU
SP A / B
N
R
U
T
E
R
P
U
T
E
S
T
A
C
/
T
S
I
L
Y
A
L
P
T
A
C
/
T
S
I
L
Y
A
L
P
RANDOM
SUBTITLE
PLAY MODE
T
A
E
P
E
R
O
I
D
U
A
RC-
681M
--/---
TAPE/AMP
M D/CDR
DOCK
CABLE
STANDBY/ON
DIMMER
ENT
D TUN
SLEEP
10
11
12
INPUT SELECTOR
HDD
DVD
VCR
REMOTE MODE
V
CR/DVR
AUX
CBL/SAT
CD
TAPE
TUNER
DVD
MULTI CH
LISTENING MODE
T V
DISPLAY
TEST TONE
CH SEL
SURROUND
STEREO
CINE FLTR
LEVEL+
LEVEL-
L NIGHT
VOL
VOL
SAT
VCR
T V
DVD
RECEIVER
CD
INPUT
+10
0
CLR
1
2
3
4
5
6
7
8
9
ENTER
CH
DISC
ALBUM
AV RECEIVER
MODEL
HT-R550
Ref. No. 4010
042007
Black and Silver models
120V AC, 60Hz
120V AC, 60Hz
230-240V AC, 50Hz
B MDD
B MDC
B MPA
---
120V AC, 60Hz
230-240V AC, 50Hz
---
S MDC
S MPA
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.
