PN-V602 (serv.man7). (Chapter 8) - Sharp Monitor Service Manual (repair manual). Page 3

PN-V602　HARDWARE DESCRIPTIONS

 8 – 3

■ COIN BATTERY

1

Function of coin battery

It acts as a backup battery for clock when the display main power is powered off.

2

Failure phenomenon when the battery 
becomes exhausted

The time is cleared while the display main power is off, and the time setting window of OSD 
is displayed when the main power is turned on.

3

PWB supply

It is supplied with the coin battery installed.

4

Voltage that can be judged as battery 
exhaustion

The clock can run when the voltage is 2.0V or more.

5

Usable years

The coin battery life is designed to be about 8 years.

Since the estimated product life is 5 years, the coin battery does not need to be replaced.
Therefore, it is not listed as a consumable part in the parts guide.

Sub microprocessor

IC6

Renesas

uPD78F1165AGC(S)-
UEU-AX

Microprocessor for LED-TCON 

Performs LED-TCON boot sequence 
control, IRIS/LED driver parameter 

setting, detection and notification of 

error information (LED open, short, 
temperature, other LED-TCON 

errors).

IRIS

IC3

sharp

IRIS

Controller to realize the LED area 

active backlight technology for WXGA

Performs through I2C interface control 

from the sub microprocessor and boot 
setting from the serial memory of SPI 

interface. 

FPGA

IC7

Altera

EP3C16E144C8N

Interfaces communication between 

LED-TCON (FPGA) and IRIS and 

LED driver (iWatt iW7032).

Interfaces communication between 
the sub microprocessor and LED 

driver for various setting and status 

data.

Interfaces LED brightness data 
between IRIS and LED driver and per-

forms transmission.

CONFIG DEVICE

IC9

Altera

EPCS4SI8N

Configuration ROM for FPGA

Stores the configuration data by using 

SRAM cell. 

2Mb Serial FLASH

IC1

ATMEL

AT25DF021-SSH-T

SPI Serial ROM for IRIS

Performs boot setting and stores LUT 
parameters.

64Mb Serial 
EEPROM

IC15

Rohm

BR24T64F-WE2

I2C EEPROM for FPGA

Stores the lighting timing data of LED 
driver.

Stores boot setting and LUT parame-

ters. 

DA converter

IC12

Rohm

Not installed

(BH2228FV)

6ch DA converter. 

Controls the voltage value (20V 3ch, 

27V 3ch) applied to the LED PWB by 

control of the LED microprocessor.