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Q74A Service Manual
INVERTER & POWER
Inverter & POWER(Q74A)
L.I.P.S : LCD INVERTER POWER SYSTEM(FLF1742-20A)
Specification
Operate 4 CCFL Lamps.
Current Feedback Control
Input Voltage : DC 12V.
When any lamp doesn't operate, the panel is under protection status.
Protection status means that circuit protect the other lamp.
PWM Control.
Remote Power On/Off control
High Efficiency
Electrical Characteristics
Description Min Typ Max Sign Remark
Input Voltage 11.0 12.0 13.0 Vin
Input Current 1.5 1.7 1.9 A 12Vdc
Output Current 5.0 6.0 7.0 mArms 1ccfl current
Lamp Frequency 40 47 55 kHz
Vin=12V
Normal Operation ON
ON/OFF=5V
ON/OFF Control
Vin=12V
Shunt-down(Lamp off) OFF
ON/OFF=0V
Kick-Off
MORE THAN 1100 Vrms Kick-Off
Voltage
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Q74A Service Manual
Pin Connection
- INPUT CONNECTOR CON1
Pin NO. Symbol Descripition
1,2 VIN 1 Input Voltage : 12V
3,4,7 GND GND
5,6 VIN 2 Inopt Voltage : 5V
8 ON/OFF Power System Return
9 NC NC
- OUTPUT CONNECTOR CN1,2,3,4
Pin NO. Symbol Descripition
1 HV1,2,3,4 HI VOLTAGE TERMINAL
2 LV1,2,3,4 LOV VOLTAGE TERMINAL
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Q74A Service Manual
Inverter & POWER BD Part List(FLF1742-20A)
NO. Ref. PART TYPE 1st. Vendor 2nd. Vendor Q,ty
1 LF101 LFL002A GET 1
2 PC101 LTV-817B-M,TCET1103 LITON Vishay 1
3 BD101 KBP206G TSC 1
4 D104,105 SB560 VISHAY-GS DIODES 2
5 D103 MBR10H150CT VISHAY-GS 1
6 C105 CE82u400V85SD,SHL,GS ,, 1
7 C103,104 KNB1560MKP-334K ISKRA PILCO, 2
8 VS1 VARISTOR 7D471 ILJIN(AMOTECH) CNR 1
9 C101,102 DG102Y1 , 2
10 C106 DG222Y1 , 1
11 C2 CE220U25V105LXZ,WL,RT ,, 1
12 CN100 SC-8R-F152P32R-GB SUPERCOM 1
13 CN101 GIL-S-9P-S2T2-EF LG 1
14 IC101 FSDM0565R FAIRCHILD 1
15 CN1,2,3,4 35002WR-02, JE207-B1T-02 JAEEUN 4
16 T101 TRSL014A GET 1
17 T3 TRS1801U - DIP , 1
18 U1,2 AP4511GD-DIP APEC 2
19 U3 BIT3105 - DIP BITEK 1
20 D101 RS1J, UF4007 TSC SHS 1
21 ZD104 ZY160 SHS 1
22 D2,4 DAN217,BAV99 Rohm DIODES 2
23 D5 DAP202U Rohm 1
24 ZD1,2,3 UDZS5.6B,BZT52C5V6S-7 Rohm DIODES 3
25 ZD102 UDZS10B,BZT52C10V0S Rohm DIODES 1
26 ZD101,103 UDZS20B,BZT52C20V0S Rohm DIODES 2
27 Q1 2N3904,MMBT3904 Rohm DIODES 1
28 C1,17 CC106Z10V3216 ,TDK 2
29 C8 CC473K50V2012 ,TDK 1
30 C13 CC271K50V2012 ,TDK 1
31 C6,7,9,12,20 CC103K50V2012 ,TDK 5
32 C11,22,24,122 CC104K50V2012 ,TDK 4
33 C3,4,14,19,119 CC105Z16V2012 ,TDK 5
34 R116,117 CR2012J200 Rohm 2
35 R114,115 CR2012J181 Rohm 2
36 R28,29 CR2012J221 Rohm 2
37 R121 CR2012J122 Rohm 1
38 R119,122 CR2012J332 Rohm 2
39 R1,16,20,22,24 CR2012J103 Rohm 5
40 R2,3,10 CR2012J183 Rohm 3
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Q74A Service Manual
Inverter & POWER BD Part List(FLF1742-20A)
NO. Ref. PART TYPE 1st. Vendor 2nd. Vendor Q,ty
41 R12 CR2012J433 Rohm 1
42 R26 CR2012J753 Rohm 1
43 R11 CR2012J134 Rohm 1
44 R5 CR2012J154 Rohm 1
45 R8,25 CR2012J224 Rohm 2
46 R9 CR2012J824 Rohm 1
47 R27 CR2012J105 Rohm 1
48 R15,19 CR2012F3600 Rohm 2
49 R126 CR2012F1431 Rohm 1
50 R123 CR2012F1801 Rohm 1
51 R124 CR2012F2702 Rohm 1
52 R101,102,103 CR3216J334 Rohm 3
53 R111 RD 1/4W J 3.9 OHM 1
54 R105,106 RD 1/4W J 33K OHM 2
55 C112 221K 1KV 1
56 C113 222K 1KV 1
57 C115 CE680u25V105RD,KM ,, 1
58 C117,118 CE1000u10V105RD,KM ,, 2
59 C110 CE47U50V 85/CE47U50V 105 ,, 1
60 IC102 TL431A Fair Child 1
61 BC102 EBFL001A GET 1
62 C5,10 CL100K3K 2
63 D102 PR1003, FR104 Diodes 1
64 TH101 SCK08053MS,NTC 5D-9 Thinking 1
65 F101 SR-5 3.15A 1
66 P.W.B FR-1 PL1742C20 1
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Q74A Service Manual
Inverter & POWER B/D(FLF1742-20A)
- Adapter Cutcuit
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Q74A Service Manual
-Inverter Circuit
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