AOC 919swa Service Manual
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Page 11
19 LCD Color Monitor AOC 919Swa 11 5.3 Electrical Characteristics 1.TFT LCD Module: M190MWW3 Note: A. If it exceeds MIN/MAX values, then CCFL Life, ON/OFF Cycle, and SAFETY will not be guaranteed. B. CCFL Frequency should be carefully determined to avoid interference between inverter and TFT LCD. C. The voltage over specified value (VCCFLi) should be applied to the lamp more than 1 second after startup. Otherwise, the lamp may not be turned on. The used...
Page 12
19 LCD Color Monitor AOC 919Swa 12 TPM190A1
Page 13
19 LCD Color Monitor AOC 919Swa 13 6. Block Diagram 6.1 Software Flow Chat 1 2 NY 5 YN 10 YN 12 Y N 7 Y N 6 4 3 8 9 14 11 13 YN 15 YN 16 17 19 Y N 18
Page 14
19 LCD Color Monitor AOC 919Swa 14 REMARK: 1) MCU initialize. 2) Is the EPROM blank? 3) Program the EPROM by default values. 4) Get the PWM value of brightness from EPROM. 5) Is the power key pressed? 6) Clear all global flags. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode. 9) Save the power key status into EPROM.Turn on the LED and set it to green color.Scalar initializes. 10) In standby mode? 11)...
Page 15
19 LCD Color Monitor AOC 919Swa 15 6.2 Electric Block Diagram 6.2.1 Main Board FLASH MEMORY SST25LF020A-33-4C-SAE (U402) Scalar HX6803-A000LAG (Include :MCU,ADC,OSD etc) (U401) Panel Interface (CN405) EEPROM M24C04-WMN6TP (U406) D-Sub Connector (CN101) EEPROM M24C02-WMN6TP (U101) DDC1_SDA DDC1_SCL Key Control Interface (CN408) Crystal 24.576MHz (X401)
Page 16
19 LCD Color Monitor AOC 919Swa 16 6.2.2 Inverter / Power Board Audio Feedback Circuit Transformer (PT801) MOSFET (Q805,Q806) Lamp Output Circuit PWM Control IC OZ9938GN (IC801) ON/OFF DIM PID 16V EMI filter Start Circuit (R904,R905， R906) PWM Control IC LD7576 (IC901) Transformer (T901) AC input 16V 5V Bridge Rectifier,FilterRectifier diodes Power Switch...
Page 17
19 LCD Color Monitor AOC 919Swa
17
7. Schematic 7.1 Main Board
R125
4K7 1/ 16W 5%
VGA_PLU G
O EM MOD EL
SizeRev
Date
Sheet
of
TPV MOD EL
PC B NAME
称爹
T P V ( Top Victory Electronics Co . , Ltd. )Key Component絬 隔 瓜 絪 腹
AOC 931SN D TB DB
25 Monday , Sept em ber 21, 2009G2681-1-4
<
称爹> 02.I nputG2681-1-4-X-1-090921
U 101
M24C02-WMN 6TPA0 1A1 2A2 3VSS 4
SDA5SC L6WP7VC C8
C120
10pF
B_GND
5V_ESD
C...
Page 18
19 LCD Color Monitor AOC 919Swa
18
POW ER _KEY #
VCC3IOC 438
0. 1uF/ 16V
C 439
0.1uF /16V
KEY 1
SDOCSNSCKSDI
GN D
RST
PANEL_I D# 7
SD ICSNSCKSDO
VCC3IO
XT AL_OU TR 469 0R 05 1/ 16W
R456
1K 1/16W 5%
SPI _W P#
VCC1.8 5
R 468 N C
VCC3.3
GN D
FB406
BEAD1
2
O E M MO D EL
Size
Rev
DateSheet
of
TP V MO D EL
PC B N AME
称爹
T P V ( Top Victory Electronics Co . , Ltd. )Key Component絬 隔 瓜 絪 腹
AOC 931SN D TB DCustom...
Page 19
19 LCD Color Monitor AOC 919Swa
19
PB2
Ripple Current NG
PB4
PB5
PB0
PB6
LVDS OUTPUT
on_Panel
O EM MO D E L
SizeRev
Date
Sheet
of
TPV MOD E L
PCB N AME
称爹
T P V ( Top Victory Electronics Co . , Ltd. )Key Component絬 隔 瓜 絪 腹
AOC 931SN D TBDA4
45 Monday , Sept em ber 21, 2009G2681-1-4
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称爹
> 04. Out putG2681-1-4-X-1-090921
on_Panel 3
2
A O3401L3D
G
1
S
PANEL_VCC
C 446N C / 65G0402104 15
C 447
NC
PA1PA0
R...
Page 20
19 LCD Color Monitor AOC 919Swa
20
U 403
N C / AP1117D 33LAADJ(GND) 1VOU T 2VI N 3
VCC3.3D
VCC3. 3D 4
R 478 N C
Q411
2N3904S-R TK/ PS
R 477
4K7 1/ 16W 5%
PANEL_ID#
VCC1.8 3
R 441
1K 1/ 16W 5%
Q408
2N3904S-R TK/ PS
D 402
SR 24
R 447
NC
C432
0. 1uF / 16V
+C 424
100uF M 16V
+C 426
100uF M 16V
+C423
100uF M 16V
R438
3.3 O HM 2W
D401
N C / BAV70/ / 93G 64 42 P
3
1
2
R 440
4K7 1/ 16W 5%
+C 427
100uF M 16V
R 437
10K 1/...