Service manual

6 B). INVERTER –MODULE SPEC &TROUBLE SHOOTING CHART

For LM720 model , use Hydis panel, and the INVERTER is made by SAMPO

SAMPO Parts No: DIVTL0085-D42 AOC Parts No.: 79LL17-3-S

I. CONNECTOR PIN ASSIGMENT:

A) CON1: INPUT

MODEL NO.: S5B-PH-SM3-TB

PIN SYMBOL DESCRIPTION

1 Vin Input voltage: 12V

2 Vin Input voltage: 12V

3 ON/OFF ON: 3V OFF:0V

4 Dimming Dimming range (0V~+5.0V)

5 GND GND

B) CON2,CON3,CON4,CON5: OUTPUT

MODEL NO.: SM02B-BHSS-1-TB

PIN SYMBOL DESCRIPTION

1 HV OUTPUT Input H.V to lamps

2 RETURN Return to control

C) FUNCTION SPECIFICATIONS:

The data test with the set of SAMPO

DC TO DC CONVERTER

(ROOM TEMPERATURE 25℃ ±4℃)

ITEM SYMBOL MIN. TYP. MAX. UNIT REMARK

Input voltage Vin 10.8 12 13.2 V

Input current Iin -- 2100 2500 mA

output current

adj:0v( min.)

Iout

(min)

2.3

2.6

3.3

FOR 1 CCFL

LOAD:120KΩ

Output current

adj.:5 v(max.)

Iout

(max)

5.5

6.0

6.5

FOR 1 CCFL

LOAD:120KΩ

Frequency

F 40 50 60 KHZ

H.V open Vopen 1550 1700 1850 Vrms NO LOAD

H.V Load Vload 600 700 800 Vrms

RL=120KΩ