Read Panasonic KX-TC1400B / KX-TC1400W Service Manual online
6.2. Base Unit
1. Please refer to figures right for base unit wire connection.
2. Solder wire connections D902. (Refer to 5.12. Base Unit
Reference Drawing.)
3. Connect the AC Adaptor (KX-TCA1-G) to base unit.
4. Press HANDSET LOCATOR twice to set base to test mode.
6.2.1. Carrier frequency check:
1. Solder RF cable to TP-ANT and TP-GR.
2. Set Marconi to Transmit Test mode by pressing TX TEST.
3. Check TX Frequency as shown on CRT. This should be
902.100 MHz+/-3 kHz.
4. Adjust value when this is above 902.100 MHz+/-3 kHz. If
can't adjust replace RF Unit.
6.2.2. Transmit power check:
Check TX POWER reading equals to -10 dBm+/-4 dBm
(reading should -14 dBm to -6 dBm).
(reading should -14 dBm to -6 dBm).
If reading is given in µW, press dB button.
6.2.3. Receiving sensitivity check:
1. Connect audio cable positive lead to TP-AF, negative lead
to TP-GR and BNC end to AF INPUT.
2. Set Marconi to Receiver Test mode by pressing RX TEST.
Enter the following value:
a. RF Frequency = 926.100 MHz
b. LEVEL = 60 dBµV
c.
Modulation Frequency = 1.000 kHz
d. LEVEL = 5.000 kHz
3. Press SINAD button until the display shows the SINAD
value and press dB button.
4. Press RF GEN and LEVEL buttons. Using the VARIABLE
knob. Decrease RF GEN LEVEL until SINAD value is
12 dB.
12 dB.
5. Check the RF GEN LEVEL equals less than +2 dBµV(+8
dBµVemf). When value is over, change RF Unit.
6.2.4. Squelch check:
1. Keep same RX TEST settings as in Receiving Sensitivity
Check.
2. Connect scope (X1) positive lead to TP-SQ, negative lead
to TP-GR and BNC end to scope. Set scope to following
condition.
condition.
a. TIME/DIV =1 msec.
b. VOLT/DIV = 1 V
3. Set RF GEN LEVEL to +5 dBµV (+11 dBµVemf). Check
scope voltage is LOW.
4. Set RF GEN LEVEL to -17 dBµV (-11 dBµVemf). Check
the scope voltage is HIGH.
5. When value is over, replace RF Unit.
14
X-TC1400B / KX-TC1400W
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