TK-3178
(
L
)
46
ADJUSTMENT
Common Section
Item
Condition
Measurement
Adjustment
Specifi cations / Remarks
Test-
equipment
Unit
Terminal
Unit
Parts
Method
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
voltage
•
RX
[Panel test mode]
1) CH-Sig: 3-1
Power meter
DVM
Panel
TX-RX
(A/4)
ANT
CV
TX-RX
(A/4)
TC502 3.8V
±0.1V
2) CH-Sig: 2-1
Check
0.6V or more
• TX
[Panel tuning mode] LPWR*
3) CH-Sig: 3-1
PTT:
ON
TX-RX
(A/4)
TC501 3.8V
±0.1V
4) CH-Sig: 2-1
PTT:
ON
Check
0.6V or more
3. LCD
contrast
DVM
TX-RX
(B/4)
LCD
TX-RX
(B/4)
VR1
Adjust the VR1 to
obtain the specifi ed
voltage.
0.97~1.00V
This item is needed when the
TX-RX unit (B/4) or LCD assy
(B38-0932-05) is replaced.
* TX can be continued on unlock condition in panel tuning mode.
Transmitter Section
Item
Condition
Measurement
Adjustment
Specifi cations / Remarks
Test-
equipment
Unit
Terminal
Unit
Parts
Method
1. Frequency
Adjustment
1) Adj item: [FREQ]
Adjust:
[
✳✳✳
]
CH-Sig:
3-1
PTT:
ON
f. counter
Panel
ANT
Panel
Selector
knob
High frequency
±50Hz
Note:
After replacing the
TCXO (X501) align frequency.
2. High
Transmit
Power
adjust
1) Adj item: [HPWR]
Adjust:
[
✳✳✳
]
2) Adj item: [L HPWR]
→
[L’ HPWR]
→
[C HPWR]
→
[H’ HPWR]
→
[H HPWR]
Adjust:
[
✳✳✳
]
PTT:
ON
Power meter
Ammeter
4.0W
±0.1W
1.8A or less
3. High
Transmit
Power
check
[Panel test mode]
1) CH-Sig: 1-1
PTT:
ON
Check
3.5~4.5W
1.9A or less
2) CH-Sig: 2-1
PTT:
ON
3) CH-Sig: 3-1
PTT:
ON
VR1
CN81
LCD
TX-RX UNIT (X57-7013-06) (B/4)
Component side