Kenwood TK-3148 Service Manual page 40

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: 3-1
• RX
2) CH-Sig: 2-1
• TX 3) CH-Sig: 3-1
PTT: ON
4) CH-Sig: 2-1
PTT: ON
Transmitter Section (Panel tuning mode except when Panel test mode is specifi ed)
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
40
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
Power Panel ANT TX-RX
meter
DVM TX-RX CV
TX-RX
Measurement
Test-
Unit Terminal Unit
equipment
f. counter Panel ANT Panel
Power
meter
Ammeter
Panel
Adjustment
Parts Method
TC2 4.0V ±0.1V
Check 0.6V or more
TC1 4.0V ±0.1V
Check 0.6V or more
Adjustment
Parts Method
Encoder Center frequency ± Note: After replacing the
knob 100Hz TCXO (X1), align using KPG-
74D CPS.
4.0W ±0.1W
1.9A or less
Check 3.7~4.3W
1.9A or less
Encoder 1.0W ±0.05W
knob 1.0A or less
Check 0.5~1.5W
1.0A or less
Specifi cations / Remarks
Specifi cations / Remarks