Nokia NSE-6 SERIES Service Manual page 247

PAMS
Technical Documentation
J231 MCURDX
J232 VB
J233 MCUWRX
J234 ROM1SELX
J235 RAMSELX
J236 CCONCSX
J250 GND
J251 AGND
J252 VSIM
J253 VSRM
J254 SGND
J254 –
J255 FBUS_RX
J256 FBUS_TX
J257 8KHZ
J261 MICP
J262 MICN
J780 (VDDTXMIX)
VBB
VXO
RFCLK
Original 08/98
Disassembly & Troubleshooting Instructions
0 0 0.5 V
1 2.0 2.85
3.0 5.3 V
0 0 0.5 V
1 2.0 2.85
0 0 0.5 V
1 2.0 2.85
0 0 0.5 V
1 2.0 2.85
0 0 0.8 V
1 2.0 2.85
0 0 V
0 0 V
(5V) 4.8 5.2 V
(3V) 2.8 3.2
5.2 5.5 V
0 0 V
0 0 0.8 V
1 2.0 2.85
0 0 0.5 V
1 2.0 2.85
0 0 0.5 V
1 2.15 2.85
4.1 mV Internal microphone positive pole
4.1 mV Internal microphone negative pole
2.7 2.85 V
2.7 2.85 V
0.5 Vpp 13 Mhz clock for baseband and RF
MCU read strobe
Battery voltage
MCU write strobe
Flash memory select
Sram memory select
Chip select for CCONT from MAD2. Ac-
tive low. Pulses 1––>0 every 8 sec, if
software is running
SIM supply voltage
Supply voltage for flash programming
regulator N201 from CCONT (N100)
Data input from external device, data
from IR to MCU module, and data from
flash prommer to MCU.
Data output for external device, data
from MCU to IR module, and data to
flash prommer.
8 KHz frame sync
Baseband main voiltage
VCTCXO voltage (13 MHz clock)
NSE–6
Page 37