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SAMSUNG Proprietary-Contents may change without notice
SGH-Z100 Circuit Description
This Document can not be used without Samsung's authorization
2-
3
1.2. Keypad Backlight
The Keypad backlight driver output is at pin 17 (KEYBD_DRV) and is designed to drive parallel connected LEDs
directly. Its output current level is SBI-programmable and meets the performance specified below. Input parameters are not
specified since they are internal.
1.3. TCXO Controller and Buffers
The PM6050 IC includes circuits for controlling the TCXO warm-up and buffering its signal for distribution throughout
the handset. Performance specifications are presented below.
2. Connector
2-1. LCD Connector
LCD is consisted of main LCD(color 65K TFT LCD) and small LCD(Mono LCD). Chip select signals in the
U300
,
LCD_CS- can enable small LCD. WLED_ON signal enables white LED of main LCD, EN_EN signal enables EL of
small LCD.
"RESET-, TFT_RESET_N" signal initiates the Reset process of the LCD.
8-bit data lines(AD(0)~AD(7)) transfers data and commands to Small LCD through by pass capacitor. Data and commands
use "RS" signal. If this signal is high, Inputs to LCD are commands. If it is low, Inputs to LCD are data. The signal
which informs the input or output state to LCD, is required. But this system is not necessary this signal.
Power signals for LCD are "VDD_LP" and "2.8VDV". "SPK_P" and "SPK_N" from U533 are used for audio speaker.
And "Vibrator" from Q313 enables the motor.
2-5. Key
This is consisted of key interface pins among U300, KEYSENSE_N(0:7). These signals compose the matrix. Result of
matrix informs the key status to key interface in the U300. Power on/off key is seperated from the matrix. So power
on/off signal is connected with U300 to enable U501. twelve key LED use the "VBAT" supply voltage.
"KEY_LED_ON" signal enables LEDs with current control. "HALL_SW" informs the status of folder (open or closed) to
the. This uses the hall effect IC, A3210ELH. A magnet under main LCD enables A3210ELH.
2-5. EMI ESD Filter
This system uses the EMI ESD filter, SMF05 to protect noise from IF CONNECTOR part.
2-6 IF connetor
It is 24-pin connector. They are designed to use VBAT, CF, TXD0, RXD0, RTS0, CTS0, JIG_ON, HFK_DETECT,
RXD1, TXD1, , HFK_MIC-, , HFK_SPK- and GND. They connected to power supply IC,
microprocessor and signal processor IC.
3. Audio
EAR1O_P and EAR1O_N from U300 are connected to the main speaker. AUXOP and AUXON are connected to the
Hands free kit. MIC_P and MIC_N are connected to the main MIC. And AUX_MIC_P and AUX_MIC_N are connected
to the Hands free kit.
Service Manual Online
Homepage:
http://manual.kmip.net/
Email:
ICQ:
343183001
QQ:
35070846
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