Panasonic KX-TG2248S Service Manual ▷ View online
13.2. TAM Test mode flow chart
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KX-TG2248S
13.3. Test mode flow chart for Handset
(*1) See Handset Reference Drawing (P.49).---Should return to OPEN after entering the Test mode.
(*2) See Adjustment Battery Low Detector Voltage (P.47).
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KX-TG2248S
13.4. X201 Check
The confirmation is made under the “TX Power Check” mode of TEST MODE.
Equipment: Frequency counter
TP for measurement: TP_ANT
Measure range: 2472.64550 MHz ± 5 kHz (1ch) at Test Standby mode in TEST MODE (P.44).
13.5. Adjustment Battery Low Detector Voltage
After replacing handset’s DSP (IC201), Re-writing Battery Low voltage to EEPROM is required.
<How to re-write>
1. Set 2.7V for DC power supply.
2. Enter the test mode (Refer to Test mode flow chart for Handset (P.46))
3. Follow to “Batt Low Check” mode......... (Slave TDD is displayed on LCD)
4. Set 2.37V for DC power supply.
Note: Check voltage at battery connector, because some voltage drop is happened, using long or thin cable.
5. Press “#“ key to write voltage value in EEPROM.
6. Turn power off. Then this value is available.
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KX-TG2248S
13.6. Base Unit Reference Drawing
When connecting the Simulator and Equipments for checking, please refer to below.
D150
C150
D105
D101
L202
C103
Q260
O
GND
VCC
UTX2
URX2
14
1
1
15
28
I
S
K
R236
R237
R238
R242
C304
C200
R241
C303
C302
R243
R240
C306
C225
R225
R233
R234
C221
C305
C307
R211
R210
R204
C402
C401
C114
Q108
Q4
L2
L1
L150
L151
CHG
SP
D205
MIC
D2
D4
Q6
C453
C115
CN1
POS1
SA1
SA2
R15
C12
C13
C15
C16
C17
C8
C9
C1
R14
R28
R30
R31
R31
R26
R23
R24
R22
C14
R24
R22
C14
D3
C11
R1
R2
R2
R3
R11
R55
R57
C243
C231
C415
C230
C237
C234 C430
C213
C214
C219
C220
C220
C215
C216
C216
C246
C238
C238
R433
C239
C101
18
1
1
30
C100
D103
C242
C244
R223
R221
R222
C705
C58
R215
R220
R235
R213
C235
C723
R216
C60
C3
R9
R9
C450
C112
C113
C106
C107
C833
C823
Q150
PbF
L3
R152
IC801
IC100
X200
IC201
IC202
IC300
S501
RF
CN101
CN100
30
31
50
51
50
81
100
1
IC101
32
25
17
24
16
9
8
1
C416
L802
C815
C809
ANT2
ANTG2
R153
R157
R154
R155
R155
R156
LC-SHS_RF
D204
D802
C805
L808
D801
C824
C867
C867
C864
C835
C830
C831
L806
L801
L803
L805
C832 C801
C802
C861
C857
C869
C860
C856
R811
R812
R804
R808
C814
C813
R807
R806
C804
C803
C807
C811
C812
L804
L804
R805
C806
R813
C858
C859
C829
C405
C412
C420
C412
C420
C421
C300
R232
R231
R232
R231
R245
R230
R300
C301
C309
C404
C406
C409
C406
C409
C407
C408
C408
C411
C413
C410
R400
R207
R202
R205
R206
C207
R260
C260
C260
R262
R252
C251
C252
R209
C227
C228
C227
C228
R264
C261
C261
C263
R261
R261
R263
C262
C828
R802
R803
C827
C826
R801
C825
C863
C862
C862
C865
C866
C822
C820
C821
C816
C817
R810
C868
L807
C819
C818
C818
FL801
CHARGE TERMINAL
TO HANDSET
TO HANDSET
AF
VOLT_METER
VOLT_METER
SP_OUT
+
-
AF OSC
2
MIC
8
AF_OSC : SP-PHONE Receiving.
1
2
AF_OSC : MIC Signal Input. <Intercom, SP-phone>
ANT
ANTG
50
CABLE
Degital SG
Spectrum Analyzer
Frequency Counter(*1)
Digital
modulation
Board*
modulation
Board*
f=1KHz
modulation:60KHz
*supplied from
Production
Engineer
AC
ADAPTOR
ADAPTOR
+
TO
DC
JACK
DC
JACK
CALLER_ID
SIMULATOR
SIMULATOR
BELL
SIMULATOR
SIMULATOR
LOOP
SIMULATOR
SIMULATOR
400
/600
AF
OSC
OSC
1
OSILLO
DTMF
SIMULATOR
SIMULATOR
AF
VOLT_METER
VOLT_METER
TO
TEL
JACK
TEL
JACK
Note: (*2) is refered to No.2 of Check Table for RF Block (P.41)
KX-
TG224
8
S
48
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