Service manual

47
DV-L70S
DV-L70BL
DV-L70W
Pin No. I/O Terminal name Operation function Remarks
52 O LED1 LED control (green) LED control
53 O AV S DVD/TV control “H” is output during TV tuner reception.
54 O LED2 LED control (red) LED control
55 O AV P DVD/TV control “H” is output during TV tuner reception
and external input.
56 DEF Defeat output H ... External synchronization (normal)
L ... Internal synchronization (in the auto
preset mode/during OSC adjustment)
57 O EPCS EPROM chip select H ... During data transmission/reception
with E
2
PROM
L ... When data is not transmitted.
58 O DACS DAC chip select H ... During data transmission to DAC
L ... When data is not transmitted.
59 O FLOF DVD video mute H ... Normal
L ... DVD video mute
60 O IN H External input control H ... External input, L ... DVD/TV mode
61 I PSW Not used.
62 O SMUTE Audio mute output L ... Speaker sound mute
63 H ... Normal
65 O PMUTE Video mute output L ... Video mute
H ... Normal
79 O FMCS Not used.
Timer
RAM (512byte) ROM (32Kbyte)
It is
interrupted.
CGRAM
ADDRESS BUS
DATA BUS
CGROM
OSD CONTROL
SIO
A/D
D/A(PWM)
PORT I/O
CLOCK
GENERATOR
SYSTEM
CONTROL
VDD
GND
CPU
(SM83 core)
33
32
66
ACL
T1 T2
CL1 CL0
P00
69
70
68
67
19
P07
12
P10
53
P17
60
P20
30
P27
20
P30
61
P32
65
P33
11
P37
7
P40
42
P47
52
P50
36
P5440 P55
35
P56
34
P57
31
VSVNC6
HSYNC
5
P64/BLK
2
P63/I
79
P60/R
78
P61/G
77
P62/B
76
OSC0
75
OSC1
74
• Block Diagram