Matsushita Electric KX-TC1461LAB, Service Manual

Page: 22 / 77

Adjustment
Items
Test
Mode
Adjustment
Point
Procedure
(A
)
TX VCO Stand-
by
L503
1. Adjust L503 so that the reading of the Digital Voltmeter is 1.80V ± 0.15V. (at
TP809)
(B
)
RX VCO Stand-
by
L502
1. Adjust L502 so that the reading of the Digital Voltmeter is 1.75V ± 0.2V.
(at TP802)
(C
)
TX Frequency
Adjustment
Stand-
by
VC1
-
Adjust VC1 so that the reading of the frequency counter is 925.9MHz ± 9KHz.
(D
)
TX Power
Confirmation
Stand-
by
-
-
Output level should be over -4 ± 2dBm on RF VTVM (50 load). (at TP510)
(E
)
RX
Sensitivity
Confirmation
(SP out)
Talk -
1. Apply -107dBm output from S.S.G. (modulation frequency 1KHz, dev. 25KHz).
2. Confirm that the distortion reading of Audio Analyzer is less than 25%.
Adjustment
Items
Test
Mode
Adjustment
Point
Procedure
(F) RSSI
Confirmation
Talk -
1. Measure the SSG output level when the SIG_OUT changes from Low to High.
(modulation frequency 1KHz, dev.25kHz)
2. Confirm that the SSG output level is -70 ± 15dBm.
(G) Speaker
Output Level
confirmation
Talk -
1. Apply -47dBm output from S.S.G. (modulation frequency 1KHz, dev. 25KHz).
2. Confirm that SP output level is 170 ± 10mVrms.
(distortion: less than 7%) (volume High).
(H) Mic
Modulation
Factor
Talk VR1
1. Apply a MIC signal (1KHz, 7mVrms or 3.8mVrms*).
2. Adjust so that the reading FM Deviation Meter is 25kHz ± 1KHz.
(I) Data
Modulation
Confirmation
Tx Data -
-
Confirm for 40kHz ± 10KHz FM Deviation Meter reading.
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) ().
SSG Frequency: 902.1 MHz
* :
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