Nokia 7088 Troubleshooting Manual

7088 (RM-219) Mobile Terminal Baseband Description and Troubleshooting Issue 1 12/2006 Company Confidential © 2006 Nokia Corporation ...

Contents Page Introduction............................................................................................................... 4 Baseband and RF Architecture................................................................................ 5 Power Up and Reset ................................ ...

Test Points.............................................................................................................. 26 Main Board Top Layer Test Points ...............................................................26 Main Board Bottom Layer Test Points...... ...

Introduction The mobile terminal with a CDMA single mode engine (Cellular/ 800) and Qualcomm base band consists of the following ASICs: z Power Management IC, PM6610 (PM) z Mobile Station Modem processor, MSM6025 (MSM) z RFT6122 and RFR6122 are RF transmitter and receiver IC. z 128Mb Flash memory and 64 ...

Baseband and RF Architecture Figure 1: Baseband and RF Block Diagram Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 5 ...

Figure 2: Power Distribution Power Up and Reset The PM6610 ASIC controls the power up and reset. The base band (MSM) can be powered up in the following ways: z Pressing the Power button, which means to ground the KPADPWR_N pin of the PM (“PHONE_ON” net in schematic). z Connecting the charger to the ...

regulator is enabled. Then, VERG_MSMP, VERG_MSMA & VERG_TCXO regulators are enabled in sequence after MSMC. There is a 120us (4 Sleep Clocks) delays between each regulator’s turning-on. The RESET_N signal (from PM6610 pin “PON_RESET_N” to MSM6025 pin “RESIN ...

Power Up The mobile terminal can use the power key and a charger to power up. Power Key When the power key is pressed, the PM enters the power-up sequence. Pressing the power key causes the KPADPWR_N pin (“PHONE_ON” net in schematic) to GND. The power key is directly connected to the PM. This means ...

Power Consumption and Operation Modes Power-off Mode In power-off mode, power (VPH_PWR) is supplied to the PM6610, RF PA, vibrator, audio amplifier, keypad backlight LED, LCD backlight booster, flash light booster and regulator to support the application of camera. ...

temperature, size, and charging current. The charger control block situated inside the PM controls the charging current delivered from the charger to the battery and mobile terminal. The maximum battery voltage is limited by turning the PM switch off when the battery voltage reaches 4.2 V. The charging ...