Pc Board - Onkyo TX-8255 Service Manual

A
SCHEMATIC DIAGRAMS-2
MICROPROCESSOR SECTION
NADG-8876
1
U01
MICROPROCESSOR PC BOARD
C716
101J
R850
10K
C717
3.3/50
(VX)
13
12
C718
11
10
100/16
(VR)
9 TUR
8
7 TUL
6
5 +9V_TU
2 4
3
2
1
C719 C728
104Z 104Z
C720
NC
P707
3
RI 2
1
1
IR IN
10
3
2
21
24
IR OUT
22
P706
NC
11
10
9
8
7
6
5
4
3
2
1
7 SR_R_OUT
6 SR_L_OUT
4 5 GND_A
4 XM_R_OUT
3 XM_L_OUT
2 +12V
1 -12V
P212B
NOTE
THE COMPONENTS IDENTIFIED BY MARK
REPLACE ONLY WITH PART NUMBER SPECIFIED.
VOLTAGE (MEASURED WITH VOLTMETER)
ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS (
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
5
EX)
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
<Note>
NC = No mount of parts.
SD-Z : XY
Location of connected terminal in schematic diagrams.
SD-Z = Schematic diagrams-Z. X = A to H, Y = 1 to 5.
B
+12VA
D705 - 707 : 1SS355
RDSSIG
RDSDAT
R722
J701
47K
J702
R721
47K
TUNED
STEREO
PLLSDA
PLLCLK
P708
SYSIN
R709
100
IRIN
IROUT
SIRIUSRX
SIRIUSTX
SRRST
XMDACRST
XMCOMSEL
XMREQERR
XMSRTXD
XMSRRXD
XMRST
TS_GND
+5V_XM
R724
R725 47K
47K
R726 47K
47K
R723
!
ARE CRITICAL FOR SAFETY
IS DC VOLTAGE.(NO INPUT SIGNAL).
) ARE IN uF/WV.
PRINTING SIDE
C
NC
D712
UDZS5.1B
C725 C724
+
+
100/16 100/16
S-812C56AUA-C3K
1 16
0Y Vcc
2 15
2Y 2X
3 14
Y_COM 1X
4 13
3Y X_COM
5 12
1Y 0X
6 11
R727
INH 3X
220
7 10 TUXMSELA
Vee A
8 9 TUXMSELB
GND B
R728
Q712
220
TC74HC4052AF
NC
C714
+
10/50
1
G
+
C715
100/16
NC
TX-8255
D703
D702
1SS355
+5V
D713
Q701
D701
L701
1SS355
470M
2 3 +5V
I O
C704
DX-5R5L224
R698
LEDZONE2
LEDPURE
R679
LEDSTBY
R680
FLDSDO
FLDCLK R681
R682
FLDCS
R683
FLDRST
R684
KEYINT3
R685
KEYINT2
R686
KEYINT1
R687
KEYINT0
KEY3 R688
R690
KEY2
R692
KEY1
R694 4.7K
KEY0
1
+ Q602
RN1404
C623
4.7/50
Refer to following table about the parts displayed by mark "LIST".
TYPE ---> MDC MPP
220
R608 None
R617 None None
R699 None 220
None
R713 None
0
R714 0
R715 10k 10k
R716 None None
10k
R717 10k
R718 None None
R719 33k 56k
R720 4.7k 33k
R734 560 270
D
Q60
+5VCPU RN24
+5VTU
+5VMPU
R674 10K
R673 10K
0
81
82
83
47
84
LEDSTBY
8
47
85
FLDSDO
8
47 86
8
FLDCLK
47
87
FLDCS
47
88
FLDRST
4.7K 89
KEYINT3
4.7K
90
KEYINT2
4.7K
91
KEYINT1
4.7K
92
KEYINT0
4.7K 93
KEY3
4.7K
94
KEY2
4.7K
95
KEY1
96
99
AVSS
97
KEY0
98
C621
104Z
99
100
R609 10K
R610 10K
R613
1M