Panasonic KX-TC1868B, Service Manual, Page: 30 / 87

8.9.2.2. Base Unit - jig (BS JIG) for
Handset
The base unit jig uses two modes: NORMAL POWER mode
and TEST POWER mode. These modes alternate when the
base unit LOCATOR button is pressed:
(1) NORMAL POWER mode, TEST SUPER LOW (red) is OFF.
This test simulates the handset is at normal/close distance.
The base unit is in NORMAL POWER mode right after the AC
adapter has been inserted.
(2) TEST SUPER LOW (POWER) mode, TEST SUPER LOW
LED (red) is ON. This test simulates the handset is at very large
distance from the base unit and the TX signal from base to
handset is very small.
Procedure: First, place handset under test to charge
(exchange security code), then remove handset from base
after you hear a beep; press LOCATOR on base unit (red LED
lights). Press TALK button on handset and if it links with the
base, then this handset sensitivity is OK.
* BS JIG becomes [NORMAL POWER] mode immediately after
the power supply turning on.
NOTES:
1) If when setting the base to TEST SUPER LOW mode, if
handset beeps 3 times and the LCD shows "No link to base.
Place on cradle and try again", press 2, 5, 8, 0 simultaneously
and then disconnect battery. Re-install battery, place unit on
cradle to get security codes and tries again.
2) Only KX-TC1851B with marks BS JIG can be used for
troubleshooting. Regular KX-TC1851B production samples
does not have the software needed for troubleshooting.
3) You can differentiate the jig from a regular unit because the
jig has silver bottom cabinet (base) and back cabinet (handset).
30
KX-TC1868B / KX-TC1871B / KX-TC1872B