Panasonic KX-TES824UA / KX-TEM824UA / KX-TE82461X / KX-TE82474X / KX-TE82480X / KX-TE82483X / KX-TE82491X / KX-TE82492X / KX-TE82493X / KX-A227X Service Manual / Supplement ▷ View online
5
KX-TES824UA / KX-TEM824UA
(RESISTORS)
J111 D0GFR00Z0001
0
J119 ERJ3GEY0R00
0
S
J121 D0GDR00Z0002
0
J122 D0GDR00Z0002
0
R4 D0GF272JA026
2.7k
R5 D0GF272JA026
2.7k
R6 D0GF821JA026
820
R7 D0GF390JA026
39
R9 D0GF272JA026
2.7k
R10 PQ4R10XJ473
47k S
R11 D0GF272JA026
2.7k
R29 D1BD1000A044
100
R30 ERX2SJR22E
0.22
R31 ERX2SJR22E
0.22
R50 ERG2SJ104 100k
R71 D0GF274JA026
270k
R72 D0GF274JA026
270k
R73 D0GF274JA026
270k
R74 D0GF154JA026
150k
R75 D0GF154JA026
150k
R110 D0GB102JA041
1k
R111 D0GB102JA041
1k
R112 ERJ3GEYJ392
3.9k S
R113 D1BB2202A055
22k
R114 D1BB5602A055
56k
R201 D0GFR00Z0001
0
R202 D0GF100JA026
10
R203 D0GF102JA026
1k
R204 D0GB222JA057
2.2k S
R205 D0GD153JA036
15k
R206 ERX2SJR10 0.1
S
R207 ERX2SJR10 0.1
S
R208 ERJ3GEYF683
68k S
R209 D0GD472JA036
4.7k
R210 D0GF222JA026
2.2k
R211 D1BD1000A044
100
R212 D0GB391JA041
390
R213 D0GB332JA041
3.3k
R214 D0GB102JA041
1k
R215 D1BB8200A055
820
R216 D0GB102JA041
1k
R220 D0GD821JA036
820
R221 D0GB225JA040
2.2M
R222 ERX2LJ68ME
68M
R230 ERJ3GEYJ563
56k S
R301 D0GF221JA026
220
R401 D0GF222JA026
2.2k
R402 D0GF222JA026
2.2k
R501 D1DZ101JA002
100
R502 D0GB471JA041
470
R503 D0GB222JA057
2.2k S
R504 D0GB103JA041
10k
R505 D0GD472JA036
4.7k
R506 ERJ3GEYJ472
4.7k S
R507 D0GF152JA026
1.5k
R508 D0GF220JA026
22
R509 D0GF220JA026
22
R510 D0GF220JA026
22
R511 D0GF220JA026
22
R512 D0GF220JA026
22
R513 D0GF220JA026
22
R514 D0GB471JA041
470
R515 D0GD102JA036
1k
R516 D0GF152JA026
1.5k
R517 D0GF152JA026
1.5k
R518 D0GF152JA026
1.5k
R519 ERJ3GEYJ561
560
S
R520 D0GB471JA041
470
R601 D0GF331JA026
330
R602 D0GF331JA026
330
R603 D0GF331JA026
330
R604 D1BD5601A044
5.6k
Safety
Ref.
No.
Part No.
Part Name & Description
Remarks
R605 D1BD8201A044
8.2k
R606 D0GD2R2JA035
2.2
R607 D1BD5601A044
5.6k
R701 D0GF222JA026
2.2k
R702 D0GF222JA026
2.2k
R703 D0GF222JA026
2.2k
(SCREW)
A XYN3+C8FN SCREW(for
D101,IC601,Q201)
B XYN3+C7FNM3
SCREW(for
D301,D401,D502,Q1)
C XNG3CFJ SCREW(for CN1)
D XYN3+C10FJ
SCREW(for CN1)
(OTHERS)
E1 PNMY1041Z HEAT
SINK(for
D101)
E2 PNMY1042Z HEAT
SINK(for
IC601)
E3 PNMY1040Z HEAT
SINK(for
Q201)
E4 PNMY1045Z HEAT
SINK(for
D301,D401)
E5 PNMY1044Z HEAT
SINK(for
D502)
E6 PNMY1043Z HEAT
SINK(for Q1)
Safety
Ref.
No.
Part No.
Part Name & Description
Remarks
6
KX-TES824UA / KX-TEM824UA
1.3.
BLOCK DIAGRAM
1.3.1.
KX-TES824UA/KX-TEM824UA POWER SUPPLY UNIT BLOCK DIAGRAM
(PSLP1278YA)
(PSLP1278YA)
Change from the Original Service Manual Section 9.5.
Noise
Filter
Rectification
&
Smoothing
Controller
Over
Current
Detection
Rectification
&
Smoothing
Voltage
Detection
DC-DC
Converter
Ringer
Amplifier
FG
SW
Battery
Back up
+24V
GND
+27V
GND
+15V
-15V
3.3V
OUTPUT
AC75V 25Hz
INTPUT
20/25Hz
AC IN
L
N
Primary Circuit
Secondary Circuit
Surge
Absorber
KX-TES824UA/KX-TEM824UA POWER SUPPLY UNIT BLOCK DIAGRAM
CN1
F1
F2
Z1
L1, L2
D10~D13, C5
IC1
IC1
Q1
PC1
T1
D101, C101
IC601
Q201, T2, IC201
CN301
Q101
Q503
RL501
Q503
RL501
7
KX-TES824UA / KX-TEM824UA
1.4.
CIRCUIT OPERATION
1.4.1.
POWER SUPPY CIRCUIT (PSLP1278YA)
Change from the Original Service Manual Section 11.1
1.4.1.1.
The function of the power unit are listed below
1.4.1.2.
Control Section
1) AC-DC Inverter Function
The AC input voltage is rectified and smoothed by D10-13 and C5. The obtained DC voltage is converted into a rectangular wave by
the switching transistor Q1, then isolated and transduced by T1. This converted rectangular wave is rectified and smoothed by
D101 and C101 to output DC27V. The DC27V is transmitted to the primary side by PC1 and then PWM- controlled to keep con-
stant. The switching frequency of Q1 is approximately 63KHz (55KHz~70KHz).
2) DC-DC Inverter Function
The DC27V as input is converted into a rectangular wave by the switching transistor Q201, then isolated and transduced by T2.
DC+15V, -15V and 3.3V are outputted by a rectification smoothing circuit composed of D401, D301, D701, C401, C301 and C702.
The +3.3V of the three outputs is PWM-controlled by IC201 to keep constant.The switching frequency of the Q2 is approx. 55 KHz.
3) Ringing signal output function
Ringing signal (20/25Hz, 75Vac from main board) is amplified in power by power amplifier circuits (including of IC501, R601~R608,
C601~C603).
Ringing signal amplified in power is transmitted to the ringing transformer through pin 4 of CN601.
4) Battery back up function
This back up battery adaptor circuit has DC supply function, from battery (+24V) to service unit and DC charge from service unit to
battery (+24V). Charge current is typ. 0.4A.
The AC input voltage is rectified and smoothed by D10-13 and C5. The obtained DC voltage is converted into a rectangular wave by
the switching transistor Q1, then isolated and transduced by T1. This converted rectangular wave is rectified and smoothed by
D101 and C101 to output DC27V. The DC27V is transmitted to the primary side by PC1 and then PWM- controlled to keep con-
stant. The switching frequency of Q1 is approximately 63KHz (55KHz~70KHz).
2) DC-DC Inverter Function
The DC27V as input is converted into a rectangular wave by the switching transistor Q201, then isolated and transduced by T2.
DC+15V, -15V and 3.3V are outputted by a rectification smoothing circuit composed of D401, D301, D701, C401, C301 and C702.
The +3.3V of the three outputs is PWM-controlled by IC201 to keep constant.The switching frequency of the Q2 is approx. 55 KHz.
3) Ringing signal output function
Ringing signal (20/25Hz, 75Vac from main board) is amplified in power by power amplifier circuits (including of IC501, R601~R608,
C601~C603).
Ringing signal amplified in power is transmitted to the ringing transformer through pin 4 of CN601.
4) Battery back up function
This back up battery adaptor circuit has DC supply function, from battery (+24V) to service unit and DC charge from service unit to
battery (+24V). Charge current is typ. 0.4A.
AC-DC Inverter Function
This function isolates and transduces the AC input voltage to DC input and output
of DC27V.
of DC27V.
DC-DC Converter Function
This function outputs DC+15V, -15V and 3.3V from the inputted DC27V.
Ringing Signal Output Function
Based on the 20/25Hz sine wave signal output from KX-TES824/KX-TEM824,
this function generates ringing and supplies to the system.
this function generates ringing and supplies to the system.
Battery Back Up Adaptor Function
This function connects battery and service unit without battery adaptor, only
needs a cable connected to the battery and service unit.
needs a cable connected to the battery and service unit.
8
KX-TES824UA / KX-TEM824UA
1.5.
TROUBLESHOOTING GUIDE
1.5.1.
NO OPERATION (Check POWER SUPPLY BOARD, MAIN BOARD) (PSLP1278YA)
Change from the Original Service Manual Section 12.1
Click on the first or last page to see other KX-TES824UA / KX-TEM824UA / KX-TE82461X / KX-TE82474X / KX-TE82480X / KX-TE82483X / KX-TE82491X / KX-TE82492X / KX-TE82493X / KX-A227X service manuals if exist.