Panasonic KX-TCD816UAS / KX-TCD816UAT / KX-TCA181UAS / KX-TCA181UAT Service Manual ▷ View online
8.3.2.
Flow Solder Side View
DCP
DCM
VDD3
VDD1
J104
GND
A
RX
TX
DC_IN
J103
J102
J101
VDD2
TP_RLY5
TP_RLY1
TP24
TP25
WHITE
RED
SP
SP
C313
C312
L1T/TP_RLY2
L1R/TP_RLY4
L2T/TP_RLY3
TP26
TP27
TP28
TP29
RED
GREEN
YELLOW
BLACK
TP16
TP15
CHARGE
CHARGE
L2R
ANT
TP_10
TP_9
LINE_DC
CLK
KX-TCD820/810/805
PQUP11340Z
PbF
DC POWER
6V
DECT Tester
CMD60
DCP
DCM
Digital
Volt Meter
LINE_DC
GND
L1T
L1R
SP+
SP-
Digital
Volt Meter
AF Volt
Meter
CHARGE+
CHARGE-
Frequency
Counter
GND
CLK
DTMF
Tester
Tester
Call - ID
Simulator
BELL
Simulator
LOOP
Simulator
AF
OSC
(Q)
(Q)
(S) (Q)
AF VOLT
METER
OSC
12
Ω/
2W
600
Ω
AF
OSC
Digital
Volt Meter
PC
TX J102
RX J103
VDD2
VDD1
VDD3
GND J104
AF Volt
Meter
OSC
150
Ω
Dummy
Handset
Handset
6.3V 47uF
8
Ω
(H)
(R)
(I) (J) (K) (L)
(M) (N) (O) (P)
(M) (N) (O) (P)
(F)
(A) (B) (C)
(D) (E) (F) (G)
(H) (I) (J) (O) (S)
(H) (I) (J) (O) (S)
Note:
(
A) - (S) is referred to Check Point (Base Unit) (P.26)
KX
-T
-T
CD8
16UAS
/
K
X
-T
C
D816U
AT
/
K
X
-T
C
A181U
AS
/
K
X
-T
CA1
81UAT
33
8.4.
Check Point (Charger Unit)
Items
Check
Point
Procedure
Check or
Replace Parts
(
A)
Charging Check
-
1. Connect Charge Contact 12
Ω/2W resistor between charge+ and charge-.
2. Measure and confirm voltage across the resistor is 3.10V ± 0.2V.
D2, R2, R1
Note:
After the measuring, sock up the solder of TP.
The connection ofadjustment equipment is as shown in
Adjustment Standard (Charger Unit) (P.34).
8.5.
Adjustment Standard (Charger Unit)
When connecting the Simulator Equipments for checking, please refer to below.
8.5.1.
Flow Solder Side View
TP3
TP4
R2
D2
R1
A
TP2
TP1
KX-TCD800 SERIES
PQLV30040ZA
PQUP11348Z
PbF
DC POWER
+6.0V
TP1
TP2
(A)
Digital
Volt Meter
12
Ω
/2W
(+)
(-)
(+)
(-)
Note:
(
A) is referred to Check Point (Charger Unit) (P.34)
34
KX-TCD816UAS / KX-TCD816U AT / KX-TCA181UAS / KX-TCA181UAT
9 TROUBLESHOOTING BY SYMPTOM (HANDSET)
Ifyour unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester
(*1) or not.
(*1) or not.
Note:
(*1) A general repair is possible even if you don’t have the DECT tester because it is for confirming the levels, such as Acoustic
level in detail.
level in detail.
(*2) Refer to
Check Point (Handset) (P.35)
9.1.
Check Point (Handset)
Please follow the items below when BBIC or FLASH is replaced.
Note:
After the measuring, sock up the solder of TP.
*:
PC Setting (P.39) is required beforehand.
The connections ofsimulator equipments are as shown in
Adjustment Standard (Handset) (P.41).
Items
Check
Point
Procedure
Check or
Replace Parts
(
A)* 1.8V Supply Adjustment
TP12
1. Confirm that the voltage between test point TP12 and GND is 1.8V ± 0.02V.
2. Execute the command “bandgap”, then check the current Value.
3. Adjust the 1.8V voltage ofTP12 executing command “bandgap XX“(XX is the
value).
IC1, Q2, C40,
R4
(
B)
DC/DC Supply
Confirmation
TP10
1. Confirm that the voltage between test point TP10 and GND is 3.68V ± 0.3V
(Backlight is OFF)/4.45V ± 0.3V (Backlight is ON).
IC1, F1, C1,
C3, C57, R1,
R2, R3, Q1,
D1, L1
(
C)
3.25V Supply
Confirmation
TP11
1. Confirm that the voltage between test point TP11 and GND is 3.25V ± 0.1V.
IC1, Q3, C4,
C5, R9, R10,
R11
(
D)*
BBIC Confirmation
-
1. BBIC Confirmation (Execute the command “getchk”).
2. Confirm the returned checksum value.
Connection ofchecksum value and program number is shown below.
IC1, X1, C7,
R19
(
E)*
FLASH Confirmation
-
1. FLASH Confirmation (Execute the command “ChkTCA181XXrevYY.ba t”).
XX: country code
YY: revision number
2. Confirm the returned checksum value.
3. The checksum is displayed in the last output line.
Note:
“XX”, “YY”, and “checksum” vary depending on the country version. You can
find them in the batch file, PQZZ- mentioned in
find them in the batch file, PQZZ- mentioned in
JIG and PC (P.39).
IC10, IC11,
R42, C134,
R42, C134,
R203, C102,
C25, R91,
R92, R13, Q8,
R14, R27,
Q20, R33
35
KX-TCD816UAS / KX-TCD816U AT / KX-TCA181UAS / KX-TCA181UAT
Items
Check
Point
Procedure
Check or
Replace Parts
(
F) Charge Control Check &
Charge Current Monitor
Check
-
1. Apply 3.5V between TR18(+) and TP17(-) with DC power supply and set
current limit to 500mA.
2. Confirm that the current limit LED of DC power supply is ON/OFF.
3. Decrease current limit ofDC power supply to 100mA.
4. Confirm that the current limit LED of DC power supply is stable. (Current limiter
is ON.)
(Ifcharge control cannot be confirmed by this procedure, please use battery to
handset power supply and try again.)
handset power supply and try again.)
IC1, Q4, Q5,
Q9, D6, L4,
L5, R5, R6,
L5, R5, R6,
F1, R58,
C136, R72,
D7, L6, L7,
C129, C135,
R7
(
G)* Charge Detection (OFF)
Check
-
1. Stop supplying 6V to CHARGE(+) and CHARGE(-).
2. Execute the command “Backloff” then “charge”.
3. Confirm that the returned value is 00 (hex).
R72, D7, L6,
L7, C129,
C135, R7, IC1,
Q4, Q5, Q9,
D6, L4, L5,
R5, R6, F1,
R58, C136
(
H)*
Battery Monitor Check
-
1. Apply 2.25V between BATT and GND.
2. Execute the command “readbatt”.
It assumes that the return value is XX.
a) 1E
XX
2C: No need to adjust
b) XX: 18 ~ 1D: Need to adjust
XX: 2D ~ 32: Need to adjust
Write AD value of2.25V to FLASH.
ex) read data: XX = 1C, write data: YY = 1C
read data: XX = 2D, write data: YY = 2D
FLASH = 0004(Low Voltage) write “YY”
Execute the command “wreeprom 00 04 01 YY”.
FLASH = 0005(No Voltage) write “YY - 1D”
Execute the command “wreeprom 00 05 01 ZZ”.
FLASH = 000A(Low Voltage BL) write “YY - 06”
Execute the command “wreeprom 00 0A 01 WW”.
Note:
ZZ = YY - 1D, WW = YY - 06
No Voltage writing data limit is ‘00’.
c) XX: 00 ~ 17: Reject
XX: 33 ~ FF: Reject
IC1, F1, C1
C3, R24, R73,
C9, R8, C61,
R43, R46,
R47, C39
(
I)
Battery Low
Confirmation
-
1. Apply 2.40V between BATTERY(+) and BATTERY(-).
2. Confirm that there is no flashing of Battery Icon.
3. Apply 2.25V ± 0.08V between BATTERY(+) and BATTERY(-).
4. Confirm that there is flashing of Battery Icon.
IC1, F1, C1
C3, R24, R73,
C9, R8, C61,
R43, R46,
R47, C39
(
J)* BBIC Clock Adjustment
CLK
1. Apply 2.5V between BATTERY(+) and BATTERY(-) with DC power.
2. Execute the command “conttx”.
3. Input Command “rdeeprom 00 01 01”, then you can confirm the current value.
4. Adjust the frequency of CLK executing the command “setfreq 00 xx (where xx
is the value)” so that the reading ofthe frequency counter is 10.368000MHz ±
10Hz.
10Hz.
Note:
CLK is displayed only for a few seconds when executing the command “conttx”
after battery is inserted.
after battery is inserted.
IC1, X1, C7,
R127, C117,
R19, IC20,
R128
36
KX-TCD816UAS / KX-TCD816U AT / KX-TCA181UAS / KX-TCA181UAT
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