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MICROPROCESSOR-CONNECTION DIAGRAM
1
S7501,S7502
VOLUME
ER
ROL
FROM POWER
2
AMP. OUTPUT
THERMAL
<--
102
~SYSOUT
-->
101
RDSSIG
<--
100
<--
RDSDAT
99
~IRABUS/~RDSCLK
<--
98
~IRIN
<--
97
SYSIN
<--
96
BAND
<--
95
<--
INIT1
94
INIT2
<--
93
INIT3
<--
92
INIT4
<--
91
INIT5
<--
90
<--
INIT6
89
INIT7
<--
88
Vss
<--
87
VPOWER
-->
86
3
Vcc2
<--
85
627FHPGP
-->
~FANH
84
~FANCTR
-->
83
SBZ2MUT
-->
82
Z2LPMUT
-->
81
SPRLSB
-->
80
-->
SPRLZ2
79
SPRLCS
-->
78
SPRLF
-->
77
APOWER
-->
76
AMUT
-->
75
-->
TUMUT
74
~SD
<--
73
~STEREO
<--
72
PLLCLK
-->
71
~PLLSDI
<--
70
-->
PLLSDO
69
PLLCE
-->
68
VLTNDAT
-->
67
VLTNCLK
-->
66
VLTNSTB
-->
65
4
5
Q305 REC
Q421 ZONE 2
SELECTOR
VOLUME
TC9162
TONE BD3814
B
RL7701
HP
RELAY
-
Q6703
GATE
CIRCUIT
Q6701,2
DC DET.
R6380,1
THERMO DET
Q703
BUFFER
INITIALIZING
IR
DEMODULATOR
IR-56K
DEMODULATOR
TUNER
PACK
RL901
POWER SW RELAY
Q921
16
16
Q653
Q654
2CH
2CH
ADC
ADC
CS5333
CS5333
C
+
Q7701
Q6901
CURRENT
BIAS
DET.
SELECT SW
RI IN/OUT
IR IN
Q991
FAN CIRCUIT
SWITCH
Q992
56K IR OUT
Q302 SOURCE
SELECTOR/VOLUME
TONE
NJW1157
SPRLSB
SPRLZ2
SPRLCS
SPRLF
Q7583
Q7582
Q7581
MUTING
SWITCH
Q401
Q402
Q403
Q404
RL6901
RL6902
Q405
PURE AUDIO
POWER
Q407
SUPPLY
Q409
Q907
PURE AUDIO
+B SW
FAN DRIVE
CIRCUIT
Q411
Q413
Q415
Q427
Q429
Q431
Q432
RL6805
Q6603
RL6807
Q6604
RL6602,RL6803
Q6602
RL6600
Q6601
TX-SR55
D
FL
FR
SL
Q406
SR
Q408
SBL
Q410
SBR
Q412
CT
Q414
Q416
SW
ZONE2
PREOUT
ZONE2
SW
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