Panasonic KX-DT590RU / KX-DT590RU-B Service Manual ▷ View online
5
KX-DT590RU/KX-DT590RU-B
3 Specifications
Design and specifications are subject to change without notice.
4 Technical Descriptions
4.1.
Block Diagram
Item
KX-DT590
Flexible Buttons
48
Dimensions
(Width x L Depth x L Height)
(Width x L Depth x L Height)
136 mm x 160 mm x 134 mm
Weight
376g (Single body)
406g (With joint part)
Calling Method
2 pair wire
Operating Environment
0
C to 40C
L23-4
C0-4-1
C0-4-2
C0-4-1
C0-4-2
CO Key 48
+3.3V
DG
CPU IC1
R5F21388CNFP
R5F21388CNFP
80pin
CO LED 48x2
LED's
driver 20
driver 20
POWER
IC2
L3
IC2
L3
D1
T1
Q1
To PBX
Flash ROM
64kBy te
64kBy te
RAM
6kBy te
6kBy te
KEY IN9-0
KEY OUT4-0
KEY OUT4-0
Q2
DINT
Port
15
30
X1 20.00MHz
JK1
Data Flash
1kBy te x 4
1kBy te x 4
Main PCB
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KX-DT590RU/KX-DT590RU-B
4.2.
Circuit Operations
4.2.1.
Power supply circuit
The circuit converts the voltage supplied from PBX into the power supply of +3.3V by IC2 (DC/DC Converter IC).
4.2.2.
Key Circuit
The key data is under the matrix control by IC1.
The key information output from KEYOUT is input into KEYIN, when the key is pressed.
The key information output from KEYOUT is input into KEYIN, when the key is pressed.
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KX-DT590RU/KX-DT590RU-B
KEY Input control timing chart
KEYIN pins have a internal pull-up resistor.
KEYIN pins have a internal pull-up resistor.
If KEY is pushed, low level is latched by connecting KEYOUT(output high) and KEYIN. If not, high level is latched.
The value is fixed by reading twice.
The value is fixed by reading twice.
4.2.3.
LED Circuit
The lighting of the LEDs is controllerd by IC1.
The LEDs light up in a dynamic lighting system.
The duty ratio is 1/8 (ON time 1.8ms).
The LEDs light up in a dynamic lighting system.
The duty ratio is 1/8 (ON time 1.8ms).
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KX-DT590RU/KX-DT590RU-B
4.2.4.
Data Communication Circuit
Function:
The data communication circuit serves the following functions:
Exchanges information between the PBX and DSS console and key input information as well as data for the LED control, etc. This
information is exchanged continuously at all times.
The data communication circuit serves the following functions:
Exchanges information between the PBX and DSS console and key input information as well as data for the LED control, etc. This
information is exchanged continuously at all times.
Circuit Operation:
When the DSS console receives an IRQ signal from the PBX, after it sends the key input information (19 pulses) to the PBX and
receives the data (47 pulses) for the LED control, etc., the DSS console will send an acknowledge signal to the PBX.
When the DSS console receives an IRQ signal from the PBX, after it sends the key input information (19 pulses) to the PBX and
receives the data (47 pulses) for the LED control, etc., the DSS console will send an acknowledge signal to the PBX.
1) Reception
The data from the DSS console is received via the H and L line along the path shown below.
H, L Line
The data from the DSS console is received via the H and L line along the path shown below.
H, L Line
D1 T1 R24 Q2 R55 IC1 Pin 49
2) Transmission
The data to the DSS console is transmitted along the following path.
IC1 Pin 15
The data to the DSS console is transmitted along the following path.
IC1 Pin 15
R22 Q1 T1 D1 H, L Line
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