How To Change The Channel; Adjustment - Panasonic KX-TC1205RUB Service Manual

9.2.

How to change the channel

9.3.

Adjustment

Adjustment Items Test Mode
(A) Battery Low 3ch Talk
Confirmation
(B) TX VCO 3ch Talk
Voltage
(C) RX VCO 3ch Talk
Confirmation
(D) TX Frequency 3ch Talk
Adjustment
(E) TX Power 3ch Talk
Adjustment
(F) RX Sensitivity 3ch Talk
Adjustment
(2nd IF output)
(G) Noise Squelch 3ch Talk
Confirmation
(H) Speaker 3ch Talk
Output Level
confirmation
(I) Mic Modulation 3ch Talk
Factor
Confirmation
(J) Data 3ch Talk
Modulation
Confirmation
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.28).
SSG Frequency: 30.175 MHz
Adjustment
Point
- 1. Set the power supply voltage to DC3.60V, and confirm so that the reading
of oscillosope is High.
2. Set the power supply voltage to DC 3.40V, and confirm so that the
reading of oscilloscope is Low.
T6 1. Adjust T6 so that the reading of the Digital Voltmeter is 1.0V ± 0.1V.
- Confirm RX VCO voltage so that the reading of the Digital Voltmeter is
2.9V ± 0.5V.
Adjust VC1 so that the reading of the frequency counter is 39.875MHz ±
VC1
0.1KHz.
T5 Adjust T5 so that the reading of the RF VTVM (50
1dBm.
T3 1. Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev.
0KHz).
2. Adjust T3 so that the reading of RF VTVM is more than 15mV.
- 1. Measure the SSG output level when the noise squelch changes from Low
to High. (modulation frequency 1KHz, dev.3kHz)
2. Confirm so that the SSG output level is -105dBm.
- 1. Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev.
3KHz).
2. Confirm so that SP output level is 120mV ± 30mV.
(distortion: less than 7%) (volume High).
- 1. Apply a MIC signal (1KHz, 2.4mV at 600
2. Confirm so that the reading FM Deviation Meter is 3.1KHz ± 0.4KHz.
- Confirm so that the reading of the FM Deviation Meter is 5kHz ± 1kHz.
27
KX-TC1205RUB / KX-TC1205R UW / KX-TC1205R US / KX-TC1205RUF
Procedure
load) is 5dBm ±
load).
Check or
Replace
Parts
IC1
IC1, X1,
T6
IC1, X1,
T6
L6, C24
IC1, VC1
DPX1, T5
DPX1, Q5,
T5
DPX1,
T3,IC1,
CF1, CF2
IC1, DPX1
IC1
IC1, DV1