Magnavox sylvania DVC840F, Руководство по обслуживанию

Страница: 58 / 71

1-16-1 H9801PIN
IC PIN FUNCTION DESCRIPTIONS
< VCR Section >
Comparison Chart of Models and Marks
IC501 (SERVO/SYSTEM CONTROL/OSD)
“H”
≥
4.5 V, “L”
≤
1.0 V
Model Mark
DVC840F A
MWD2205 B
DVC865F C
Pin
No.
Mark
IN/
OUT
Signal
Name
Function
Active
Level
1 IN
P-DOWN
-L
Power Voltage
Down Detector
Signal
L
2 IN
REC-
SAF-SW
Recording
Safety SW
Detect (With
Record tab =
“L” / With out
Record tab =
“H”)
H/L
3 IN T-REEL
Take Up Reel
Rotation Signal
PULSE
4 - N.U. Not Used -
5 IN
REMOTE-
VIDEO Remote
Control Sensor
L
6
- N.U. Not Used -
7 OUT
A-MUTE-
H
Audio Mute
Control Signal
(Mute = “H”)
H
8
- N.U. Not Used -
9
- N.U. Not Used -
10 - N.U. Not Used -
11
IN/
OUT
DVD-PC
DVD Power
Supply
-
12
IN/
OUT
IIC-BUS-
SDA IIC BUS
Control Data
H/L
13 OUT
IIC-BUS-
SCL IIC BUS
Control Clock
H/L
14 OUT YCA-SCL
YCA IC Control
Clock
H/L
15 OUT YCA-SDA
YCA IC Control
Data
H/L
16 OUT YCA-CS
YCA IC Control
Chip Select
H/L
17 - N.U. Not Used -
18 OUT RF-SW
Video Head
Switching
Pulse
H/L
19 OUT
D-V
SYNC Dummy V-sync
Output
H/Hi-z
20 IN RESET
System Reset
Signal (Reset =
“L”)
L
21 OUT
LM-FWD/
REV
Loading Motor
FWD/ REV
Output
H/Z/L
22 OUT P-ON-L
Power On
Signal to Low
L
23 - N.U. Not Used -
24 OUT D-REC-H
Delayed
Record Signal
H
25
A,B - N.U. Not Used -
C OUT
HiFi-H-
SW
HiFi Audio
Head Switching
Pulse
H/L
26 OUT
DVD-
POWER DVD Power
Control Signal
H
27 OUT C-F/R
Capstan Motor
FWD/REV
Control Signal
(FWD = “L” /
REV = “H”)
H/L
28 OUT C-CONT
Capstan Motor
Control Signal
PWM
29 OUT D-CONT
Drum Motor
Control Signal
PWM
30 - N.U. Not Used -
31 - VDD VDD -
32 OUT OSCO
Main Clock
Output
14.31818MHz
-
33 IN OSCI
Main Clock
Input
14.31818MHz
-
34 - VSS VSS
35 IN XI
Sub Clock
Input 32.768
MHz
-
36 OUT XO
Sub Clock
Output 32.768
MHz
-
37 IN SXI
Operation
Mode Selecting
Input Signal
-
Pin
No.
Mark
IN/
OUT
Signal
Name
Function
Active
Level