Ericsson A2618s Troubleshooting Manual page 3

1.4 Abbreviations
B: Crystal.
C: Capacitor.
D: Digital circuit.
H: Buzzer, LED, and pads for display.
J: Connector.
L: Coil.
N: Analogue circuit, power amplifier at some units.
R: Resistor.
S: Keyboard pads.
V: Transistor, diode.
X: Contact surface on the circuit board.
Z: Filter.
DCIO:
GND:
RTC:
SIMCONCLK: Signal from the processor used for communication to SIM, clock-signal.
SIMDCONAT: Signal from the processor used for communication to SIM, data-signal.
SIMCONRST: Signal from the processor used for communication to SIM, reset-signal.
SIM VCC:
VBATT:
VPPFLASH: Voltage to erase and program the memory. 12.0 ± 0.60 V
VCORE:
VCORE DSP: DC voltage for the DSP 1.8 ± 0.10 V
VDIG:
VLCD:
VHOM:
VRAD:
V380B:
VRTC:
VVCO:
2
I C:
Unit:
4/00021-2/FEA 209 544/25 A
DC voltage through the system connector for charging.
Ground.
Real Time Clock, the clock that keeps track of time.
Feed voltage for SIM, 5.0 ± 0.10 V
Battery voltage, 3.70 ± 0.5 V
DC voltage for the processor 2.4 ± 0.10 V
DC voltage for the processor and memory, 2.75 ± 0.10 V
DC voltage for the display that controls the contrast, the voltage is generated in
the display-assembly.
DC voltage for the radio part except the synthesiser, 3.8 ± 0.20 V
DC voltage for the radio part, 3.8 ± 0.20 V
DC voltage for the radio part, 3.8 ± 0.20 V
DC voltage for the real time clock, 2.35 ± 0.15 V
DC voltage for the synthesiser, 3.8 ± 0.10 V
Communications standard for two-way communication using only 2 wires.
What the mobile telephone later in this document will be called.
Trouble Shooting Guide, Standard
DC.
DC.
DC.
DC.
DC.
DC.
DC.
DC.
DC
DC.
DC.
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