Onkyo TX-DS494 Service Manual page 10

E
004
-70GNK
TUBE
VOLUME
ROTARY ENCODER
RI
AM FREQ STEP
NAETC-7046
U10
7001
5MHZ
MASTER VOLUME PC BOARD
DSP+5V
+24V
AUDIO+12V
AUDIO-12V
FL-29V
Q934
78M05
5V
O G I
EO,TUNER
Q931
78M56
1
5.6V
O G I
MICON,FL
Q3151
TC9164AF
FSWSLT
FSWSDO
FSWSCK
BYPASS
MIXED
MULTI-CH
DIRECT
BYPASS
MIXED
MULTI-CH
DIRECT
Q3301
NJM4565M-D
DSP
MULTI-CH
+4.2dB
Q3301
NJM4565M-D
DSP
MULTI-CH
+4.2dB
Q3501
NJM4565M-D
DSP
MULTI-CH
+4.2dB
DSP
MULTI-CH
U8
MAIN PC BOARD
NAAR-7044
U20
VIDEO TERMINAL
PC BOARD
+5V
NAPS-7055
U19
REGULATOR
REGULATOR CIRCUIT
Q933
PC BOARD
5V
78M05
DSP
O G I
Q921
78M12
+12V
O G I
AUDIO
G I
O
-12V
Q922
79M12
-29V REGULATOR
TONE VR
NAETC-7047
AF INPUT/VOLUME /TONE
Q3171
+1dB/+11dB
TC9482N
Q3181 Q3181,3183
NJM4565M-D NJM4565M-D
+1dB
Q3182
+1dB/+11dB
Q3281
Q3281,3183
NJM4565M-D
NJM4565M-D
+1dB
Q3282
Q3284
Q3381
NJM4565M-D
+8.4dB
Q3384
Q3381
NJM4565M-D
+8.4dB
Q3484
Q3581
NJM4565M-D
+8.4dB
Q3584
Q3581
NJM4565M-D
+27dB
VOLSLT
Q3684, Q3685
SDO
SCK
GAINCTL
FOR TX-DS494 FOR HT-R490
FMUTE
P401
NAETC-7056
Q405
BA7625
Q406
BA7625
S-VIDEO SELECTOR
P402
F
SECONDARY TERMINAL
U6
POWER TRANS
PC BOARD
NAETC-6795 FL AC
PT
+B
MAIN AMP
-B
FRONT CH
NAAF-6789
FRONT CHANNEL
U1
POWER AMPLIFIER
PC BOARD
PROTECT
I-PRO
V-PRO
+29dB
Q3184
+29dB
SURROUND CH
+29dB
+29dB
+29dB
PROTECT
RI
P401
MWT only
MONITOR
AM FREQ STEP
DVD
NAAF-6790
V1 IN
V2 IN
U14
INPUT TERMINAL PC BOARD
NAAF-7050
TX-DS494/HT-R490
G
PT
POWER SW
NAETC-7054
PRIMARY TERMINAL
U18
PC BOARD
SUB PT
POWER RELAY
Q951
NAPS-7051
U15
PRIMARY CIRCUIT
PC BOARD
HEAD PHONE JACK
(TX-DS494 ONLY)
HPIN
NAETC-7045
HEAD PHONE JACK
PROTECT
U9
PC BOARD
FRONT SPEAKER
FRONT SPEAKER TERMINAL
U3
PC BOARD
SP out 21Vrms Max (8ohm)
R L
SPARL
SPBRL
NAETC-6791
SPARL
SPARL
C RS
SURROUND
CENTER
SPEAKER
SPEAKER
NAETC-6792
SURROUND SPEAKER
U4
TERMINAL PC BOARD
SURROUND CHANNEL POWER
U2
AMPLIFIER PC BOARD
NASW-7052
U16
POWER SWITCH
PC BOARD
AC IN
MD; AC120V
MJ; AC100V
MG; AC220-230V
MP; AC230-240V
MW; AC120V and
AC220-230V
SPEAKERS
SP-A
SP-B
SPEAKERS
LS