How To Change The Channel; Adjustment; Adjustment Standard (Base Unit) - Panasonic KX-TC2106UAB Service Manual

KX-TC2106UAB / KX-TC2106UAS / KX-TC2106UAT / KX-TC2106UAW
7.2.

How to change the channel

Note:
Refer to Adjustment Standard (Base Unit) (P.21) for connection.
7.3.

Adjustment

Adjustment Items Test Mode
(A) RX VCO
Adjustment
(B) TX VCO
Adjustment
(C) TX Frequency
Confirmation
(D) TX Power
Adjustment
(E) RX Sensitivity
Confirmation (2nd
IF output)
(F) Line Output Level
Confirmation
(G) Line Input
Modulation
Confirmation
(H) Noise Squelch
Confirmation
* : The connections of adjustment equipment are as shown in Adjustment Standard (Base Unit) (P.21).
S.S.G. Frequency: 39.875 MHz
Adjustment
Point
• • • • Adjust T404 so that the reading of the Digital Voltmeter is 1.5 ± 0.3 V.
3ch Talk T404
• • • • Adjust T402 so that the reading of the Digital Voltmeter is 1.5 ± 0.3 V.
3ch Talk T402
• • • • Confirm so that the reading of the frequency counter is 30.175MHz ±
3ch Talk -
700Hz.
• • • • Adjust T403 so that the reading of the RF VTVM is more than 8dBm.
3ch Talk T403
3ch Talk T401 1. Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev.
0KHz).
2. Confirm that the reading of AF VTVM is the maximum value (more than
20mV).
3ch Talk - 1. Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev.
3KHz).
2. Confirm that the reading of AF VTVM is more than 600mV (600Ω load).
3ch Talk - 1. Input via loop simulator 1.0KHz, 55mV (measured at T-R) signal.
2. Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev.
0KHz).
3. Confirm so that the reading of FM Deviation Meter is 2.4 ± 0.4KHz.
3ch Talk - 1. Measure the S.S.G. output level when the noise squelch changes from
Low to High.
2. Confirm that the S.S.G. output level is -105dBm ~ -110dBm.
*Procedure
20
Check or
Replace
Parts
IC401, T404,
C446
IC401,
DV401,
T402
IC401, X401,
DV401,
C440,
C441
IC401, Q403,
Q405, T403,
DPX401
DPX401,
T401,
CF401,
CF402
IC401, Q304
IC401,
DV401
IC401,
DPX401