Panasonic VL-SV74BX, Service Manual

Page: 13 / 99

4.2.1.2.2 Audio Part
Sub CPU (IC405)
Operating Power Supply : +3.3V
Operating Power Supply : +4V (SP AMP)
Operating Power Supply : +3.2V (RF)
Operating Power Supply : +1.8V (Core)
Package: 206pin
Package Size: 15 x 15 mm
Outline of Operation: Baseband signal processing/Sound
signal processing/Part of RF and voice control.
System clock frequency: 10.368MHz (X401)
8M FROM (IC402)
Operating Power Supply : +1.8V
Package: 8pin SOIC
Memory capacity: 8Mbit
Outline of Operation: Storing the program of IC405.
EEPROM(IC401)
Operating Power Supply : +3.3V
Package: SOP-J8
Memory capacity: 64kbit
Outline of Operation: Storing the parameter of IC405.
1MSRAM (IC404)
Operating Power Supply : +1.8V
Package: 48-ball VFBGA
Memory capacity: 1Mbit
Outline of Operation: Work area of IC405.
4.2.1.2.3 Video/Timer/LCDIF/TSP Part
OP AMP for LCD_BL Circuit (IC270)
Operating Power Supply : +3.3V
Package: 8pin SSOP-8
Outline of Operation: Control of LCD_BL current.
Timer (IC390)
Operating Power Supply : +3V
Package: 8pin SNT-8A
Outline of Operation: timer of IC100.
System clock frequency: 32.768KHz (X790).
4.2.1.2.4 DPJP3 Part
DPJP3 (IC100)
Operating Power Supply : +1.2V +3.3V
Package: 216pin LQFP216
Package: 26 x 26 mm
Outline of Operation: Video signal processing/Part of LCD
and the other control.
System clock frequency: 27MHz
SDRAM(IC300)
Operating Power Supply: +1.2V +3.3V
Package: 54pin TSOP II
Memory capacity: 128Mbit
Outline of Operation: Work area of IC100.
FLASH MEMORY(IC350)
Operating Power Supply: +3.3V
Package: 8pin SOIC
Memory capacity: 128Mbit
Outline of Operation: Storing the program of IC100.
- 13 -