Filter
Top Products
12.2. How to change the channel
12.3. Adjustment
Adjustment Items Test Mode Adjustment
Point
Procedure Check or
Replace
Parts
(A) Battery Low
Confirmation
3ch Talk - 1. Adjust the power supply voltage to DC3.60V,and confirm so that the
reading of oscillosope is High.
2. Adjust that power supply voltage to DC 3.40V, and confirm so that the
reading of oscilloscope is Low.
IC1
(B) TX VCO
Adjustment
3ch Talk T6 1. Adjust T6 so that the reading of the Digital Voltmeter is 1.5V ± 0.3V. IC1, X1,
T6, DV1
(C) RX VCO
Confirmation
3ch Talk - 1. Confirm so that the reading of the Digital Voltmeter is 0.7 ~ 3.0V. IC1, X1,
L6, C24
(D) TX Frequency
Adjustment
3ch Talk VC1
•
• •
• Adjust VC1 so that the reading of the frequency counter is 39.8750MHz
± 100Hz.
IC1,
DPX1, T5
(E) TX Power
Confirmation
3ch Talk -
•
• •
• Confirm so that the reading of the RF VTVM is more than -3.0dBm
(50Ω load).
IC1,Q3,Q4,
Q5, DPX1
(F) RX Sensitivity
Confirmation
(2nd IF output)
3ch Talk T3 1. Apply 60dBuVemf output from S.S.G. (modulation frequency 1KHz, dev.
0KHz).
2. Confirm that the reading of RF VTVM is the maximum value (more than
15mV).
DPX1,
T3,IC1,
CF1, CF2
(G) Noise Squelch
Confirmation
3ch Talk - 1. Measure the SSG output level when the noise squelch changes from
Low to High. (modulation frequency 1KHz, dev.3kHz)
2. Confirm that the SSG output level is -18 ~ 0dBuVemf.
IC1, DPX1
(H) Speaker
Output Level
Confirmation
3ch Talk - 1. Apply 60dBuVemf output from S.S.G. (modulation frequency 1KHz, dev.
3KHz).
2. Confirm that the reading of AF VTVM is more than 30mV.
(distortion: less than 5%) (volume High).
IC1
(I) Mic Modulation
Factor
Confirmation
3ch Talk - 1. Apply a MIC signal (1KHz, 5.0mV at 600Ω load).
2. Confirmation so that the reading of FM Deviation Meter is 3.4KHz ±
0.4KHz.
IC1, DV1
(J) Data
Modulation
Confirmation
3ch Talk -
•
• •
• Confirm for 5.0 ± 1.0KHz FM Deviation Meter reading.
(K) Battery low
Confirmation
- - 1. Apply 3.50V between BATT(+) and BATT(-).
2. Confirm that there is no flashing of RECHARGE LED.
3. Apply 3.40V between BATT(+) and BATT(-).
4. Confirm that there is flashing of RECHARGE LED.
IC1
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.30).
SSG Frequency: 30.175 MHz
29
KX-TC2000NZB / KX-TC2000NZW / KX-TC2000NZF