Panasonic KX-TC1881B, Service Manual

Page: 30 / 96

No Item BS (Base unit) (*1) HS (Handset) (*1)
4 TX Power
confirmation
Procedure
1. Put RF wire to ANT and ANT_GND (See Base Unit
Reference Drawing ).
Connect this wire Marconi or Spectrum Analyzer.
2. Set Test-mode [Continuos Send Low Power].(*3)
3. Confirm TX power level within -3
­
±5dBm (*2)
(0.158~1.58mW)
4. Set Test-mode [Continuos Send High Power].(*3)
5. Confirm TX power level 17±4dBm (*2)
(20~126mW)
1. Put RF wire to ANT and ANT_GND (See
Reference Drawing ).
2. Set Test-mode [Continuos Send Low Power].(
3. Confirm TX power level within -4±5dBm
(0.126~1.26mW)
4. Set Test-mode [Continuos Send High Power].(
5. Confirm TX power level 16±4dBm
(16~100mW)
Check
point
1. Check F102 and T101 soldering.
2. Check L102~107, C101~102 and C137 soldering.
3. Check Antenna in BS.
1. Check F102 and T101 soldering.
2. Check L102~107, C101~102 and C137 soldering.
3. Check Antenna in HS.
5 Receiver
confirmation
Procedure
1. Put “HS JIG” on BS.
2. Set MODE to [NORMAL POWER] position of “HS
JIG”.
3. Press [TALK] key of “HS JIG“ to establish link.
4. Change MODE to [TEST POWER] position of “HS
JIG“.
5. Press [TALK] key of “HS JIG” to establish link about
30cm away from “BS”.
1. Put HS on “BS JIG”.
2. Set MODE to [NORMAL POWER] position
JIG”.
3. Press [TALK] key of “HS” to establish link.
4. Change MODE to [TEST POWER] position
JIG”.
5. Press [TALK] key of “HS” to establish link
30cm away from “BS JIG“.
Check
point
1. Check F102 and T101 soldering.
2. Check L102~107, C101~102 and C137 soldering.
3. Check Antenna in BS.
1. Check F102 and T101 soldering.
2. Check L102~107, C101~102 and C137 soldering.
3. Check Antenna in HS.
(*1)BS: Base unit, HS: Handset unit, HS JIG: Handset-jig, BS JIG: Base unit-jig
(*2)Marconi setting
TX Freq.; 906.00MHz mode; WB
Spectrum analyzer setting
Freq. 906.00MHz Span 10MHz
RBW 1MHz or above VBW same as RBW
(*3)See TEST MODE AND ADJUSTMENT .
(*4)Do not adjust X101 when probe is directly attached to X101. Test probe should be attached
to antenna, then adjust.
(*5)See
RF-DSP interface signal wave form .
8.6.5. RF-DSP interface signal wave form
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