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1.2 Abbreviations used in the trouble-shooting
instructions.
B: Crystal
C: Capacitor
D: Digital circuit
F: Overload protection
H: Buzzer, ligth diodes, pads to the display
J: Connection
L: Coil
N: Analouge circuit
R: Resistor
U: BALUN. Component that converts a balanced signal to a nonbalanced or the
opposit direction.
V: Transistor, diode
X: Antenna connection, contact point on the board.
Z: Filter
AGND:
Ground to analouge signal
DCIO:
Direct current through the system connector for charging the bat-
tery.
DCON:
Logical signal from the processor that keeps the phone powered on
after releasing the On/Off-button.
GND:
Ground
LED3K:
Logical signal that activates the illumination.
ONSRQ:
Voltage from the On/Off-button that power on the phone.
REGON:
Logical signal that activates the regulator for the voltage.
RTC:
Real time clock. The clock that shows the time.
SIMCONCLK: Signal from the processor that is used for communication to SIM,
clock.
SIMCONDAT: Signal from the processor that is used for communication to
SIM,data.
SIMCONRST: Signal from the processorn that is used for communication to
SIM,reset.
SIMVCC:
Feed voltage to SIM.
SWDC:
Switch VBATT
VANA:
Voltage to the analouge part of the logical circuit (N800).
4-00021-2/FEA 209 544/5.C
I888, Standard Electrical Repairs
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