Nokia 9210i Servicehandbuch
PAMS
Technical Documentation
RAE-5
3. RF+System Module KL8
Page 3 – 35
Issue 1 04/02
Charger controlling PWM output line, CHRG_CTRL, comes from CCONT’s
PWM output (PWM_OUT).
PWM output (PWM_OUT).
External RF
External RF signal comes from RF section of KL8. RF connector in system con-
nector includes switch for external/internal signal routing. When external RF
plug is not connected to the system connector, RF signal is connected to coax-
ial antenna cable connector (X499).
nector includes switch for external/internal signal routing. When external RF
plug is not connected to the system connector, RF signal is connected to coax-
ial antenna cable connector (X499).
POWER block
Power block includes following functions:
– supply voltage generation for system and RF parts and 2.8V to UI
– control of main battery charging
– power on and power off controlling and reset generation
– RTC and RTC backup control
– sleep clock generation
– SIM interface
– A/D conversions
– powering of Memory Card
– Accessory power output generation (through System Connector)
– supply voltage generation for system and RF parts and 2.8V to UI
– control of main battery charging
– power on and power off controlling and reset generation
– RTC and RTC backup control
– sleep clock generation
– SIM interface
– A/D conversions
– powering of Memory Card
– Accessory power output generation (through System Connector)
Main components in power block are:
– CCONT2M power ASIC (N100)
– CHAPS charging control ASIC (N101)
– Linear regulator (N102) for VBB
– DC/DC switching regulator (V105) for Vcore
– Linear regulator (N103) for Memory Card powering (VMMC)
– Linear regulator (N104) for Accessory power output (VACC)
– FET (V108) for control of regulators N102 and V105
– 32.768kHz crystal oscillator (32k XTAL B100)
– 2.7V reset device (D101), NC7SZ175 D–flip–flop (D102) and fets (V102,
V106) for power on & off control
– 2.0V reset device (D100) for backup disconnection
– ESD protection zener array (V103) for SIM interface
– 2–pin connector (X102) for backup battery (contacts for positive terminals)
– Battery connector (X100) for main battery
– SIM card connector (X101)
– CCONT2M power ASIC (N100)
– CHAPS charging control ASIC (N101)
– Linear regulator (N102) for VBB
– DC/DC switching regulator (V105) for Vcore
– Linear regulator (N103) for Memory Card powering (VMMC)
– Linear regulator (N104) for Accessory power output (VACC)
– FET (V108) for control of regulators N102 and V105
– 32.768kHz crystal oscillator (32k XTAL B100)
– 2.7V reset device (D101), NC7SZ175 D–flip–flop (D102) and fets (V102,
V106) for power on & off control
– 2.0V reset device (D100) for backup disconnection
– ESD protection zener array (V103) for SIM interface
– 2–pin connector (X102) for backup battery (contacts for positive terminals)
– Battery connector (X100) for main battery
– SIM card connector (X101)
Clocking, powering, charging and reset issues of CCONT and CHAPS are cov-
ered in separate chapters .
ered in separate chapters .
Backup battery is connected to CCONT’s VBACK input and it is charged from
CHAPS’ VBACK supply. Backup battery’s positive contacts are made so that
VBACK from CHAPS is connected to CCONT only when the battery is installed
to the connector X102. Backup battery is located on top of RF shield A501 and
grounded through the shield.
CHAPS’ VBACK supply. Backup battery’s positive contacts are made so that
VBACK from CHAPS is connected to CCONT only when the battery is installed
to the connector X102. Backup battery is located on top of RF shield A501 and
grounded through the shield.
2.0V reset device (D100) disconnects backup battery if it’s voltage drops too
much. This prevents deep discharging which would permanently harm the
backup battery.
much. This prevents deep discharging which would permanently harm the
backup battery.