Kenwood TK-3148 Service Manual page 42

TK-3148
Common Section
Item Condition
1. Setting 1) BATT terminal voltage:7.5V
2) SSG Standard modulation
[Wide] MOD:1kHz, DEV:3kHz
[Narrow] MOD:1kHz, DEV:1.5kHz
2. VCO lock [Panel Test Mode]
voltage 1) CH-Sig:2-1
RX 2) CH-Sig:3-1
TX 3) CH-Sig:2-1
PTT:ON
4) CH-Sig:3-1
PTT:ON
Transmitter Section [Panel Tuning Mode except when Panel TEST Mode is specified.]
Item Condition
1. Frequency 1) Adj item [FREQ]
Adjust Adjust [∗∗∗]
PTT:ON
2. Hight Power 1) Adj item [HPOW]
Adjust Adjust [∗∗∗]
2) Adj item
[L HPOW] ➞ [L2 HPOW] ➞ [C HPOW] ➞ [H2 HPOW] ➞ [H HPOW]
Adjust [∗∗∗]
PTT:ON
3. Hight Power [Panel Test Mode]
Check 1) CH-Sig:1-1
PTT:ON
2) CH-Sig:2-1
PTT:ON
3) CH-Sig:3-1
PTT:ON
4. Low Power 1) Adj item [LPOW]
Adjust Adjust [∗∗∗]
2) Adj item
[L LPOW] ➞ [L2 LPOW] ➞ [C LPOW] ➞ [H2 LPOW] ➞ [H LPOW]
Adjust [∗∗∗]
PTT:ON
5. Low Power [Panel Test Mode]
Check 1) CH-Sig:1-1
Set low power (Push [C])
PTT:ON
2) CH-Sig:2-1
PTT:ON
3) CH-Sig:3-1
PTT:ON
42
ADJUSTMENT
Measurement
Test equipment Unit Terminal
Power meter Panel ANT
DVM TX-RX CV
Measurement
Test equipment Unit Terminal
Freq. Counter Panel ANT
Power meter
Am meter
Adjustment
Unit Parts Method
TX-RX TC2 4.0V
Check
TC1 4.0V
Check
Adjustment
Unit Parts Method
Panel Encoder Center frequency ± 100Hz
knob (Note:) After replacing the TCXO
(X1), align using KPG-74D CPS
Encoder 4.0W
knob
Check
Panel Encoder 1.0W
knob
Check
Specifications/
Remark
±0.1V
0.6V or more
±0.1V
0.6V or more
Specifications/
Remark
±0.1W
1.9A or less
3.7~4.3W
1.9A or less
±0.05W
1.0A or less
0.5~1.5W
1.0A or less