Nikon COOLPIX 4500 Manuel De Maintenance
VAA11901-R.3579.A
- E6 ･ E4500 -
See next page →
1-5. SY1 CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SY1 circuit board, refer to the block diagram. The configuration of the SY1 cir-
cuit board centers around a 8-bit microprocessor (IC301).
The 8-bit microprocessor handles the following functions.
1. Operation key input, 2. Mode LCD display, 3. Clock control, 4. Power ON/OFF, 5. Storobe charge control, 6.
Signal output for lens control of zoom, focus and so on.
Pin
Signal
I/O
Outline
1-4
5
6
7
8
9
6
7
8
9
10
11
12
13
14
15
16
17
11
12
13
14
15
16
17
18-21
22
23
24
25
23
24
25
26, 27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46, 47
48
49
49
SCAN OUT 0, 2, 3, 1
P ON
PA ON
LCD ON
BACKUP CTL
VSS
VDD
F. LED (R)
F. LED (G)
SCAN IN 3
SCAN IN 4
SCAN IN 4
SI/PRG SI
SO/PRG SO
SCK/PRG SCK
ZM IN 1-4
CMD B
CHG ON
VDD
AVSS
SCAN IN 5, 1
TEMP
FM PI
FM PI
ZOOM PI
DC IN
CHG VOL
BATTERY
AVREF
AVDD
RESET
XCOUT
XCIN
IC
XOUT
XIN
VSS
BAT OFF
SREQ
CMD A
SCAN IN 0, 2
PI CTRL
FM CKO
O
O
O
O
O
O
O
O
O
-
-
-
O
O
O
I
I
I
I
I
O
O
O
O
O
I
O
-
-
I
I
I
I
I
I
I
I
-
I
-
I
I
I
I
I
I
I
I
-
I
O
I
-
-
O
I
-
I
I
I
I
-
I
I
I
I
O
O
O
Key matrix output
DC/DC converter ON/OFF signal
DC/DC converter ON/OFF signal
H : ON
DC/DC converter (analog) ON/OFF signal H : ON
LCD monitor power ON/OFF signal
Backup battery charge ON/OFF control
GND
Power supply terminal
F. LED ON/OFF signal
LCD monitor power ON/OFF signal
Backup battery charge ON/OFF control
GND
Power supply terminal
F. LED ON/OFF signal
L : LED lighting
F. LED ON/OFF signal
L : LED lighting
Key matrix input
Key matrix input
Serial communication data input ( ← ASIC)
Serial communication data output ( → ASIC)
Serial communication clock output
Zoom motor drive signal 1~4
Command input B
Flash charge ON/OFF signal
Key matrix input
Serial communication data input ( ← ASIC)
Serial communication data output ( → ASIC)
Serial communication clock output
Zoom motor drive signal 1~4
Command input B
Flash charge ON/OFF signal
H : ON
Power supply terminal
A/D converter GND power terminal
Key matrix input
Temperature detection (analog input)
Focusing motor standard position detection (analog input)
Zoom motor standard position detection (analog input)
DC power detection terminal
A/D converter GND power terminal
Key matrix input
Temperature detection (analog input)
Focusing motor standard position detection (analog input)
Zoom motor standard position detection (analog input)
DC power detection terminal
L : Connection
Strobe charge voltage input (analog input)
Battery voltage input
A/D converter standard voltage input terminal
A/D converter analog power terminal
Reset input
Sub clock oscillation terminal (32.768 kHz)
Sub clock oscillation terminal
Connect to VSS
Main clock oscillation terminal (4MHz)
Main clock oscillation terminal
GND
Battery off detection signal
Serial communication requirement signal
Battery voltage input
A/D converter standard voltage input terminal
A/D converter analog power terminal
Reset input
Sub clock oscillation terminal (32.768 kHz)
Sub clock oscillation terminal
Connect to VSS
Main clock oscillation terminal (4MHz)
Main clock oscillation terminal
GND
Battery off detection signal
Serial communication requirement signal
L : Requirement
Command input A
Key matrix input
Photo interrupter ON/OFF control
Key matrix input
Photo interrupter ON/OFF control
L : ON
Focusing motor drive clock output