Aiwa XD-DV170, Service Manual

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Pin No. Pin Name I/O Description
IC DESCRIPTION - 3/8 (HD6412350F20) -2/3
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97, 98
99, 100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
USDA
UML
UMC
UMD
__________________
WDTOVF
______________
RESET
NMI
___________
STBY
VCC
XTAL
EXTAL
VSS
fO
VCC
______
AS
______
RD
__________
HWR
__________
LWR
____________
WAIT
PFO
HRST
YS SCK, YS SI
VSS
Q_SURROUND
TEST MUTE
AVCC
VREF
V-DET
_____
NTSC/PAL
REGION
ECOHVOL
SW
C2PO
EMPH
SV2
AVSS
VSS
AK4527CS
RGB/YC
____
YS912 CBS
CS-KARAOKE
I/O
O
O
O
O
I
I
I
I
I
I
I
—
I
—
O
O
O
O
—
O
—
I
O
—
I
I
—
I
I
I
I
—
—
O
I
I
—
—
—
—
I
2
C data input/output terminal for EEPROM, video encoder IC.
Data enable signal output terminal for AUDIO DAC IC control.
Clock for AUDIO DAC IC control.
Data output terminal for AUDIO DAC IC control.
Watch dog timer overflow signal output terminal.
Micro processor reset input terminal.
Fixed is to “H”.
Power input terminal. EVER 5 V.
Crystal oscilator input terminal. 20 MHz.
GND.
Not used. (System clock output for external device.)
Power input terminal. EVER 5 V.
Not used. (Address strobe.)
Lead signal output terminal for bus control.
“H” write signal output terminal for bus control.
“L” write signal output terminal for bus control.
Bus request output terminal.
Not used. (Bus request acknowlege.)
Reset signal output terminal for LOADER.
Not used.
GND.
Q SURROUND IC control terminal. ON = H OFF = L.
Not used.
Power supply input terminal for A/D. EVER 5V.
Reference voltage input terminal for A/D. EVER 5V.
Not used.
NTSC: L, PAL: H (for DVD output)
DVD REGION CODE, 1: 0 ~ 1 V, 2: 1 ~ 2 V, 3: 2 ~ 3 V, 4: 3 ~ 4 V, 5: 4 ~ 5 V.
Karaoke echo volume control 0 ~ 5 V.
NTSC/PAL serect (for VIDEO CD) (Not used).
Not used.
Not used.
Voltage output for S2 terminal. S1 = 5V S2 = 2.5 V Normally = 0 V.
GND.
Not used. (pull up)
Not used.
Not used. (pull up)
Chip select for KARAOKE DSP