Philips FX20 Service Manual page 39

8-11
Circuit Diagram - Main board:MCU
A
RTC_3.3V
1
R137 R137 NC/33 NC/33 1
2
TIME_ON/OFF 3
4
2
MCU_3V3 3.3V_STBY_MCU
3.3V_STBY_MCU
C169 C169 C170 C170 C171 C171 C172 C172
3.3V_STBY_MCU
MCU_RST
R198 R198
10K 10K
MCU_RST
C174 C174
3
4
3.3V_STBY_MCU
4PIN/2.0mm 4PIN/2.0mm
XP10 XP10
1
1
2 ICE_DAT
2
3
3
4 MCU_RST
4
4
A
B
MCU_3V3 RTC_3.3V
R138 R138 NC/0 NC/0
RTC_3.3V
U13 U13
8
OSCI VDD
7
OSCO CLKOUT
6 RTC_SCL
INT/ SCL
5
RTC_SDA
VSS SDA
NC/PCF85163 NC/PCF85163
C277 C277
0.1uF/25V/Y5V 0.1uF/25V/Y5V
27pF/50V/NP0 27pF/50V/NP0
3.3V_STBY_MCU
5 Power_EN
Power_EN
USB_EN TP67 TP67 R201 R201 0 0
11 USB_EN USB_FLG TP71 TP71 R203 R203 0 0
USB_FLG
11
TIME_ON/OFF R213 R213 0 0
U18 U18
C173 C173
STM08S005C6 STM08S005C6
3.3V_STBY_MCU
3.3V_STBY_MCU
13
VDDA
R782 R782 14
VSSA
10K/1% 10K/1%
R268 R268 0 0 15
PB7/AIN7
16
R267 R267 0 0
PB6/AIN6
TR1 TR1 R255 R255 0 0 17
PB5//AIN5/SDA
10K 10K
NFC_PIO8 18
PB4//AIN6/SCL
12 NFC_PIO8
R256 R256 0 0 19
PB3/AIN3/TIM1_ETR
20
R269 R269 0 0
PB2/AIN2/TIM1_CH3N
R257 R257 0 0 21
PB1/AIN1_TIM1_CH2N
IR R258 R258 0 0 22
PB0/AIN1_TIM1_CH1N
8 IR
TP66 TP66 23
PE7/AIN8
ADC_KEY 24
ADC_KEY R207 R207 0 0
PE6/AIN7
R206 R206
10K 10K
3.3V_STBY_MCU
DSP_MUTE
10
4052_SWA
7
7 4052_SWB 3.3V_STBY_MCU
TH_WAR
4
TH_FAULT
4
R217 R217
10K 10K
3.3V_STBY_MCU
B
C D
C150 C150 C151 C151
Y2 Y2 27pF/50V/NP0 27pF/50V/NP0
12MHz/20PPM 12MHz/20PPM
R186 1M R186 1M
R188 R188 1K 1K
MCU_RST
ESD14 ESD14
LVSL10180Z020/18V/2pF LVSL10180Z020/18V/2pF
R199 R199
48 POWER_FRQ1 4
PD7/TIM1_CH4
47 R192 R192 0 0 MCU_RXD
6
UART1_RX/PD6 0 0 MCU_RXD
46 R193 R193 0 0 MCU_TXD
6
UART1-TX/PD5 MCU_TXD
45 R200 R200 33 33 POWER_FRQ2
4
PD4/BEEP/TIM2_CH1
44 R194 R194 0 0
PD3/TIM2_CH2/ADC_ETR PCON 8
43 R260 10K R260 10K
3.3V_STBY_MCU
PD2/TIM2_CH3
42 ICE_DAT
PD1/SWIM
41
VOL- 8
PD0/TIM3_CH1
40
PE0/CLK_CCO VOL+ 8
39
PE1/I2C_SCL
38
4
PE1/I2C_SDA DC FRQ
37
5
PE3/TIM3_CH2 BT_STATUS1_PAIR1
R212 NC/10K R212 NC/10K
3.3V_STBY_MCU
3.3V_STBY_MCU
R215 R215 R211 R211 R210 R210 R254 R254
10K 10K
10K 10K
BT_FN1 5
BT_POWER_CONTROL1 5
BT_RESET1
5
R195 R195 4.7K 4.7K NFC_INT
NFC_INT
5
R216 R216 0 0
BT_STATUS1
5
C D
8-11
E
1
2
TUNER_SCL
TUNER_SCL 9
TUNER_SDA
9
TUNER_SDA
RTC_SCL
9
RTC_SCL
RTC_SDA
RTC_SDA 4
VFD_CS
9
VFD_CS
VFD_CLK
VFD_CLK 9
VFD_DATA
VFD_DATA 9
ADC_KEY
ADC_KEY 9
IR
9
IR
VOL-
9
VOL-
VOL+
9
VOL+
LED
LED 9
NFC_INT
NFC_INT 9
DC FRQ
DC FRQ 4
3
4
E