Panasonic KX-DT590RU / KX-DT590RU-B Service Manual ▷ View online
13
KX-DT590RU/KX-DT590RU-B
7.2.
How To Replace a Flat Package IC
Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount), a sol-
dering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.
dering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.
7.2.1.
Preparation
• PbF (: Pb free) Solder
• Soldering Iron
• Soldering Iron
Tip Temperature of 700
F ± 20F (370C ± 10C)
Note: We recommend a 30 to 40 Watt soldering iron. An
expert may be able to use a 60 to 80 Watt iron where some-
one with less experience could overheat and damage the
PCB foil.
expert may be able to use a 60 to 80 Watt iron where some-
one with less experience could overheat and damage the
PCB foil.
• Flux
Recommended Flux: Specific Gravity
0.82.
Type
RMA (lower residue, non-cleaning type)
Note: See About Lead Free Solder (PbF: Pb free) (P.4).
7.2.2.
Removal Procedure
1. Put plenty of solder on the IC pins so that the pins can be
completely covered.
Note:
Note:
If the IC pins are not soldered enough, you may give
pressure to the P.C. board when cutting the pins with
a cutter.
pressure to the P.C. board when cutting the pins with
a cutter.
2. Make a few cuts into the joint (between the IC and its
pins) first and then cut off the pins thoroughly.
3. While the solder melts, remove it together with the IC
pins.
When you attach a new IC to the board, remove all solder
left on the land with some tools like a soldering wire. If some
solder is left at the joint on the board, the new IC will not be
attached properly.
left on the land with some tools like a soldering wire. If some
solder is left at the joint on the board, the new IC will not be
attached properly.
7.2.3.
Procedure
1. Tack the flat pack IC to the PCB by temporarily soldering
two diagonally opposite pins in the correct positions on
the PCB.
the PCB.
Be certain each pin is located over the correct pad on the PCB.
2. Apply flux to all of the pins on the IC.
3. Being careful to not unsolder the tack points, slide the sol-
dering iron along the tips of the pins while feeding enough
solder to the tip so that it flows under the pins as they are
heated.
solder to the tip so that it flows under the pins as they are
heated.
7.2.4.
Removing Solder From Between
Pins
Pins
1. Add a small amount of solder to the bridged pins.
2. With a hot iron, use a sweeping motion along the flat part
2. With a hot iron, use a sweeping motion along the flat part
of the pin to draw the solder from between the adjacent
pads.
pads.
14
KX-DT590RU/KX-DT590RU-B
8 Schematic Diagram
8.1.
Main Board
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
G
R
C
E
B
A
D
F
3
4
2
LIN10
LIN9
LIN8
LIN7
LIN6
LIN5
LIN4
C4-2
C4-1
C3-2
C3-1
C2-2
C2-1
C1-2
C1-1
C0-2
C0-1
LIN12
LIN13
LIN14
LIN15
LIN16
LIN17
LIN18
LIN19
LIN20
LIN21
LIN22
LIN23
C4-2
C3-2
C2-2
C1-2
C0-2
C4-1
C3-1
C2-1
C1-1
C0-1
LIN4
LIN5
LIN6
LIN7
LIN8
LIN9
LIN10
LIN11
Q30
Q13
1
2
3
4
5
C20
0.1u
16
DG
DG
Q20
1
2
3
4
5
DG
3.3V
Q38
Q16
1
2
3
4
5
Q32
C13
NC
DG
DG
3.3V
Q34
Q14
1
2
3
4
5
DG
DG
Q19
1
2
3
4
5
Q22
1
2
3
4
5
Q37
Q35
Q31
DG
DG
Q21
1
2
3
4
5
C30
1000p
50
Q39
Q33
DG
DG
Q15
1
2
3
4
5
Q36
Q18
1
2
3
4
5
Q17
1
2
3
4
5
R35
R37
R39
R41
LED45
3
4
1
2
LED40
3
4
1
2
LED35
3
4
1
2
LED34
3
4
1
2
LED39
3
4
1
2
LED44
3
4
1
2
LED48
3
4
1
2
LED43
3
4
1
2
LED38
3
4
1
2
LED33
3
4
1
2
LED32
3
4
1
2
LED37
3
4
1
2
LED42
3
4
1
2
LED47
3
4
1
2
LED46
3
4
1
2
LED41
3
4
1
2
LED36
3
4
1
2
LED31
3
4
1
2
LED30
3
4
1
2
LED25
3
4
1
2
LED20
3
4
1
2
LED15
3
4
1
2
LED10
3
4
1
2
LED5
3
4
1
2
LED4
3
4
1
2
LED9
3
4
1
2
LED19
3
4
1
2
LED24
3
4
1
2
LED29
3
4
1
2
LED23
3
4
1
2
LED18
3
4
1
2
LED13
3
4
1
2
LED8
3
4
1
2
LED3
3
4
1
2
LED2
3
4
1
2
LED7
3
4
1
2
LED12
3
4
1
2
LED17
3
4
1
2
LED22
3
4
1
2
LED27
3
4
1
2
LED26
3
4
1
2
LED21
3
4
1
2
LED16
3
4
1
2
LED11
3
4
1
2
LED6
3
4
1
2
LED1
3
4
1
2
LED14
3
4
1
2
LED28
3
4
1
2
R43
R45
R47
R49
R51
R53
RA1 2.2k
1
2
3
4
5
6
7
8
6
7
8
RA2 2.2k
1
2
3
4
5
6
7
8
6
7
8
RA3 2.2k
1
2
3
4
5
6
7
8
6
7
8
DG
TP25
TP26
TP27
TP28
TP29
LIN12A
LIN13A
LIN14A
LIN15A
LIN16A
LIN17A
LIN18A
LIN19A
LIN20A
LIN21A
LIN22A
LIN23A
LIN13B
LIN14B
LIN15B
LIN12B
LIN16B
LIN17B
LIN18B
LIN19B
LIN20B
LIN21B
LIN22B
LIN23B
LIN12C
LIN13C
LIN14C
LIN15C
LIN16C
LIN17C
LIN18C
LIN19C
LIN20C
LIN21C
LIN22C
LIN23C
C0-2A
C1-2A
C2-2A
C3-2A
C4-2A
C0-1A
C1-1A
C2-1A
C3-1A
C4-1A
LIN11C
LIN10C
LIN9C
LIN8C
LIN7C
LIN6C
LIN5C
LIN4C
LIN4A
LIN5A
LIN6A
LIN7A
LIN8A
LIN9A
LIN10A
LIN11A
LIN4B
LIN5B
LIN6B
LIN7B
LIN8B
LIN9B
LIN10B
LIN11B
C0-1B
C1-1B
C2-1B
C3-1B
C4-1B
C0-2B
C1-2B
C2-2B
C3-2B
C4-2B
R48
56
R50
R52
56
R38
R40
R42
R44
56
R46
R36
56
R54
150
56
150
150
56
150
150
150
150
56
150
56
150
56
56
150
1
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(7)
(8)
(9)
(10)
(11)
(12)
KX-DT59058 MAIN BOARD 1/2
15
KX-DT590RU/KX-DT590RU-B
C
E
B
A
D
F
6
7
5
4
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(7)
(8)
(9)
(10)
(11)
KX-DT59058 MAIN BOARD 2/2
LIN
2
1
LIN
2
0
LIN19
LIN18
LIN1
7
LIN1
6
LIN15
LIN14
LIN13
LIN1
2
LIN11
LIN
2
3
LIN
22
KE
Y
IN0
KE
Y
IN1
KE
Y
IN
2
KE
Y
IN3
KE
Y
IN4
KE
Y
IN5
KEYIN9
KEYIN8
KEYIN7
KEYIN6
KEYOUT4
KEYOUT3
KEYOUT2
KEYOUT1
KEYOUT0
KEYIN8
KEYIN7
KEYIN6
KEYIN5
KEYIN4
KEYIN9
KEYIN3
KEYIN2
KEYIN1
KEYIN0
KE
Y
OUT0
KE
Y
OUT1
KE
Y
OUT
2
KE
Y
OUT3
KE
Y
OUT4
SW26
1
2
C14
0.1u
SW24
1
2
SW30
1
2
SW16
1
2
SW28
1
2
SW18
1
2
SW12
1
2
SW15
1
2
SW21
1
2
SW14
1
2
SW23
1
2
SW27
1
2
SW25
1
2
SW17
1
2
C12
1000p
SW29
1
2
SW11
1
2
SW19
1
2
SW13
1
2
DG
SW22
1
2
SW20
1
2
JK1
1
2
3
4
5
D1
4
1
3
2
R4
220
R5
220
Q1
R22
R
2
3
R24
2.2k
R
2
5
R
26
3.3V
DG
DG
3.3V
3.3V
T1
1
2
4
5
7
10
9
8
R8
DG
C1 33u
50
3.3V
3.3V
X
1
2
0M
R1
4.
7k
L
H
V1
MODE
RESET
R12
DG
DG
R9
1M
R10 0
C11
0.01u
DG
SW6
1
2
SW8
1
2
SW10
1
2
SW7
1
2
SW9
1
2
SW1
1
2
SW3
1
2
SW5
1
2
SW2
1
2
SW4
1
2
SW40
1
2
SW43
1
2
SW39
1
2
SW31
1
2
SW45
1
2
SW47
1
2
SW36
1
2
SW33
1
2
SW42
1
2
SW35
1
2
SW32
1
2
SW38
1
2
SW48
1
2
SW46
1
2
SW44
1
2
SW41
1
2
SW37
1
2
SW34
1
2
R21
TP30
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
TP9
TP10
TP18
TP19
KEYIN9
KEYIN8
KEYIN7
KEYIN6
KEYIN5
KEYIN4
KEYIN3
KEYIN2
KEYIN1
KEYIN0
DG
IC3 NC
1
NC
2
A
4
Y
5
VCC
3
GND
DG
C31
0.01u
1
6
R55
0
R3
10
k
R
2
9
NC
C19
NC
R
27
NC
DG
C
6
0.1u
1
6
R
2
8
27k
C
7 150u
2
5
C4
0.1u
50
R
2
3.9
k
R3
2
NC
R33
NC
D
2
3.3V
D3
D4
C1
7
1u
Q2
C
2
0.1u
50
C8
0.01u
50
R56
0
C5
8
2
00p
R30
18
k
C1
6
2
.2
u
10
TP20
TP21
TP22
TP23
TP24
TP31
TP31
TP32
TP33
TP34
DG
IC2
1
BOOT
2
VIN
3
EN
4
SS/TR
5
RT/CLK
6
PWRGD
7
VSENSE
8
COMP
9
GND1
10
PH
11
GND2
L3 220u
IC1
79
P9_4
1
P5_
6
3
P3_
2
5
P4_
2
7
P4_3
9
*RESET
11
V
SS
13
V
CC
24
P2_6
15
P5_3
26
P2_4
1
7
P5_1
28
P2_2
19
P3_
7
30
P2_0
32
P9_2
34
P9_0
36
P3_1
38
P8_6
40
P8_4
4
2
P8_
2
44
P8_0
4
6
P
6
_
6
48
P4_5
50
P1_
6
5
2
P1_4
54
P1_
2
5
6
P1_0
58
P
7
_
6
6
0
P
7
_4
62
P7_2
64
P7_0
66
P0_6
68
P0_4
70
P0_2
72
P0_0
74
P6_3
76
P6_1
78
P9_5
80
P5_7
2
P5_5
4
P3_0
6
MODE
8
P4_4
10
P4_
7
1
2
P4_
6
21
P3_4
23
P2_7
14
P5_4
25
P2_5
1
6
P5_
2
27
P2_3
18
P5_0
29
P2_1
2
0
P3_5
31
P9_3
33
P9_1
35
P3_6
37
P8_7
39
P8_5
41
P8_3
22
P3_3
43
P8_1
45
P
6
_
7
4
7
P
6
_5
49
P1_
7
51
P1_5
53
P1_3
55
P1_1
5
7
P
7
_
7
59
P
7
_5
61
P7_3
63
P7_1
65
P0_7
67
P0_5
69
P0_3
71
P0_1
73
P6_4
75
P6_2
77
P6_0
C15
0.01u
DG
3.3
V
C18
100p
50
R1
7
50
k
R34
62
0
k
C3
0.015u
1
6
R31
10
k
R14
18
k
R13
100
k
R6
8.2k
C9
18p
C10
15p
10k
8
1
k
4.
7k
2.7k
NC
6
8
6
8
2k
R
7
1M
(12)
16
KX-DT590RU/KX-DT590RU-B
8.2.
Waveform
(2) Between H and L ( Offset 40V )
(1) X1 (20.000MHz)
send data to PBX
recieve data from PBX
Pin10 of IC1
Click on the first or last page to see other KX-DT590RU / KX-DT590RU-B service manuals if exist.