Kenwood TK-285, Service Manual

Page: 31 / 43

TK-285/(N)
30
ADJUSTMENT
Item Condition
Measurement Adjustment
Specifications/
Test equipment Unit Terminal Unit Parts Method
Remark
Transmitter Section [Panel Tuning Mode except when Panel TEST Mode is specified.]
14.TONE 1) Adj item [TONE] Power meter Panel ANT Panel Encoder 1.45kHz
±
0.05kHz
Deviation Adjust [
∗∗∗
] Dev meter universal knob
Adjust LPF:15kHz Oscilloscope connector
HPF:OFF AG
PTT:ON AF VTVM
15.BATT 1) Adj item [BATT] Power meter Panel ANT Panel Encoder After pressing BATT terminal
Detection Adjust [
∗∗∗
] DVM BATT knob the PTT switch, voltage:6.2V
Writing PTT:ON terminal confirm that
one predeter-
mined numeric
in the range 1
to 256 appears
and then press
[C] key. That
numeric will be
stored in memory.
16.BATT [Panel Test Mode] Check No blinking of LED
Detection 1) CH-Sig:1-1
Check BATT terminal voltage:6.5V
PTT:ON
2) BATT terminal voltage:5.7V Blinking of LED
PTT:ON
Receiver Section [Panel Tuning Mode except when Panel TEST Mode is specified.]
Item Condition
Measurement Adjustment
Specifications/
Test equipment Unit Terminal Unit Parts Method
Remark
1. Sensitivity 1) Adj item [SENS] SSG Panel ANT Panel Encoder Adjust for 14dB SINAD or
Adjust Adjust [
∗∗∗
] knob maximam more.
SINAD.
2) Adj item AF VTVM Universal
Oscilloscope Connector
[L SENS]
➞
[C SENS]
➞
[H SENS]
Adjust [
∗∗∗
]
SSG OUT:-118dBm (0.28
µ
V)
MOD:1kHz /
±
1.5kHz
2. Sensitivity [Panel Test Mode]
Check 1) CH-Sig:1-1 Check 12dB SINAD or
SSG OUT more
-117dBm (0.316
µ
V)
(MOD:1kHz /
±
1.5kHz)
3. Squelch 1) Adj item [SQL] Adjust to point
(Preset) Adjust [
∗∗∗
] of opening
Adjust SSG OUT: squelch.
12dB SINAD level +2dB
2) Adj item
[L SQL]
➞
[C SQL]
➞
[H SQL]
Adjust [
∗∗∗
]