Samsung YP-F1 Service Manual page 35

13. Circuit Description
1. Description of the Circuit
1-1. Main Blocks in the Circuit Diagram
Circuit Diagram (by Function)
13-1
1-2.Main Functions by Block
Circuit Diagram
1. Recharging
* Receives USB 5V input to recharge Li+ polymer battery.
2. USB Switch
* Turns the USB signal line on/off for USB communication.
3. Audio Output
* Turns on/off audio output.
4. FM Reception
* Receives FM signals.
5. Voice Recording
* Receives voice input signals through condenser micro
phone.
6. RTC (Clock)
* Generates data through internal clock.
MAIN
7. LCD
* Displays data that have been inputted from MICOM
8. Flash Memory
* Reads/Writes flash memory
9. Key Interface
* Delivers signals from TACT S/W*4, LEVER S/W*1 to MICOM
10. Power Unit
* Power from the battery is outputted here through the internal DCDC converter.
11. Main IC (STMP 3520) Circuit
* The circuit related to the main IC.
- This Document can be used without Samsung's authorization -
Main Functions Remarks
The USB
Switch and the
Audio Output
operate in
opposite direc-
tions.
Samsung Electronics