AOC 177Pk Service Manual

AOC 177Pk Service Manual

17" lcd color monitor
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17" LCD Color Monitor
Service
Service
Service
Description
Table Of Contents......................................................1
Revision List........................................................2
Important Safety Notice............................................3
1.Monitor Specification...............................................4
2.LCD Monitor Description........................................5
3.Operation Instruction...............................................6
3.1.General Instructions.................................................6
3.2.Control Button......................................................6
3.3.Adjusting the Picture..........................................7
4.Input/Output Specification.......................................9
4.1.Input Signal Connector.........................................9
4.2 Power Supply Requirement..............................10
N
4.3.Factory Preset Display Modes.........................10
4.4.Panel Specification...............................................11
5.Block Diagram........................................................13
5.1.Software Flow Chart......................................13
5.2.Electrical Block Diagram.....................................15
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

TABLE OF CONTENTS

Page
Description
6.Schematic...........................................................17
6.1.Main Board.................................................17
6.2. Audio Board.......................................................22
6.3. Power Board.......................................................23
7.PCB Layout...........................................................25
7.1.Main Board.......................................................25
7.2.Power Board...............................................27
7.3.Audio Board...............................................29
7.4.Key Board..........................................................29
8.Maintainability........................................................30
8.2.Trouble Shooting..........................................31
10.Monitor Exploded View....................................39
11.BOM List........................................................42
12.Different Parts List..........................................54
SAFETY NOTICE
1
AOC 177Pk
Horizontal Frequency
30-83 kHz
Page

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Summary of Contents for AOC 177Pk

  • Page 1: Table Of Contents

    17” LCD Color Monitor AOC 177Pk Service Service Service Horizontal Frequency 30-83 kHz TABLE OF CONTENTS Description Page Description Page Table Of Contents..……......…..1 6.Schematic…………………........…17 Revision List.…........……..2 6.1.Main Board..........17 Important Safety Notice.……......……..3 6.2. Audio Board..………..…........22 1.Monitor Specification......………..4 6.3. Power Board..…..….…........23 2.LCD Monitor Description……………………………..5 7.PCB Layout..………………........25...
  • Page 2: Revision List

    17” LCD Color Monitor AOC 177Pk Revision List Revision Date Revision History TPV Model Jun.-18-07 First Version Release T76CRTDBF1ACA Dec.-10-07 Second Release T76CRTDBF1A2E...
  • Page 3: Important Safety Notice

    AOC 177Pk Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.
  • Page 4: Monitor Specification

    17” LCD Color Monitor AOC 177Pk 1. Monitor Specifications Items Descriptions Driving system TFT Color LCD CLAA170EA07 Type Size 43.2cm 17" LCD Panel Pixel pitch 0.264mm( H )x 0.264mm( V ) Viewable angle 160˚ (H) 160˚ (V) (CR≥10) Response time (type)
  • Page 5: Lcd Monitor Description

    17” LCD Color Monitor AOC 177Pk 2. LCD Monitor Description The LCD MONITOR will contain a main board, an audio board, a power board and a key board which house the flat panel control logic, brightness control logic and DDC.
  • Page 6: Operation Instruction

    17” LCD Color Monitor AOC 177Pk 3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.
  • Page 7: Adjusting The Picture

    17” LCD Color Monitor AOC 177Pk 3.3 Adjusting the Picture OSD functions Main Sub Menu Main Menu Item Menu Menu Description Item Icon Icon Contrast Contrast from Digital-register. Luminance Brightness Backlight Adjustment Focus Adjust Picture Phase to reduce Horizontal-Line noise...
  • Page 8 17” LCD Color Monitor AOC 177Pk Analog Select input signal from analog source (D-Sub) Input Select Digital Select input signal from digital source (DVI) H. Position Adjust the horizontal position of the OSD. OSD Setup V. Position Adjust the vertical position of the OSD.
  • Page 9: Input/Output Specification

    17” LCD Color Monitor AOC 177Pk 4. Input/Output Specification 4.1 Input Signal Connector 1. D-SUB connector Pin No. Description Pin No. Description + 5V Green Detect Cable Blue Ground Ground DDC-Serial Data DDC-Return H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground VGA connector layout 2.
  • Page 10: Power Supply Requirement

    17” LCD Color Monitor AOC 177Pk 4.2 Power Supply Requirement A/C Line voltage range : 100 V ~ 240 V : 50 ± 3Hz, 60 ± 3Hz A/C Line frequency range Current : TBD Peak surge current : < 55A peak at 240 VAC and cold starting Leakage current : <...
  • Page 11: Panel Specification

    17” LCD Color Monitor AOC 177Pk 4.4 Panel Specification CLAA170EA07P2 is 17.0” color TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of LCD panel, driver ICs, control circuit and backlight. By applying 8 bit digital data, 1280×1024, 16.7M-color images are displayed on the 17.0”...
  • Page 12 17” LCD Color Monitor AOC 177Pk 4.4.3 Electrical Characteristics 1. TFT LCD Module 2. Backlight Unit...
  • Page 13: Block Diagram

    17” LCD Color Monitor AOC 177Pk 5. Block Diagram 5.1 Software Flow Chat...
  • Page 14 17” LCD Color Monitor AOC 177Pk 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.
  • Page 15: Electrical Block Diagram

    17” LCD Color Monitor AOC 177Pk 5.2 Electrical Block Diagram 5.2.1 Main Board Crystal PANEL 24MHZ (CN504) (X301) CLKOUT Scalar IC RTD2525L RTD2120L (Included ADC, OSD) (U402) (U401) EPR_SDA H sync EPR_SCL V sync Key Board Flash Memory Control AT24C16AN...
  • Page 16 17” LCD Color Monitor AOC 177Pk 5.2.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit: R911 CN902 Feedback Circuit Control IC ON/OFF Output MOSFET Circuit Transformer Lamp Over ON/OFF Feedback Voltage Control Circuit...
  • Page 17: Schematic

    17” LCD Color Monitor AOC 177Pk 6. Schematic 6.1 Main Board...
  • Page 18 17” LCD Color Monitor AOC 177Pk...
  • Page 19 17” LCD Color Monitor AOC 177Pk...
  • Page 20 17" LCD Color Monitor AOC 177Pk...
  • Page 21 17" LCD Color Monitor AOC 177Pk...
  • Page 22: Audio Board

    17" LCD Color Monitor AOC 177Pk 6.2 Audio Board 715G1841-2 OUT_L +12V CN202 MUTE CONN CN204 VOLUME C202 C201 C203 +12V 470uF/16V 470uF/16V 0.1uF OUT_R C214 NC-CONN U201 E-TDA7496L C205 CN201 C204 0.47uF/25V R201 18K   1/16W OUTL 470uF/16V C206...
  • Page 23: Power Board

    17" LCD Color Monitor AOC 177Pk 6.3 Power Board 715G1823-2 R951 47Ω 1/4W 0.001uF/500V R952 C920 47Ω 1/4W 2KBP08M D920 IND CHOKE 3.5uH+-10% DADONG SBT150-10LST R909 T901 L921 100KΩ 2W +12V C910 C925 R931 100uF/450V 470uF/25V 10KΩ 1/4W R911 C910 10KΩ...
  • Page 24 17" LCD Color Monitor AOC 177Pk CN801 PT801 POWER X'FMR R836 C835 +12V CONN C816 12pF/3KV 1KΩ 1/8W 0Ω 1/4W CN802 R802 R804 R805 R818 R819 300KΩ 1/4W 10KΩ 1/4W 470Ω 1/4W 15Ω 1/4W 15Ω 1/4W C811 470uF/25V C817 CONN...
  • Page 25: Pcb Layout

    17" LCD Color Monitor 177Pk 7. PCB Layout 7.1 Main Board...
  • Page 26 17" LCD Color Monitor 177Pk...
  • Page 27: Power Board

    17" LCD Color Monitor 177Pk 7.2 Power Board...
  • Page 28 17" LCD Color Monitor 177Pk...
  • Page 29: Audio Board

    17" LCD Color Monitor 177Pk 7.2 Audio Board 715G1841-2 7.4 Key Board 715G1819-1-2...
  • Page 30: Maintainability

    17" LCD Color Monitor 177Pk 8. Maintainability 8.1 Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual.
  • Page 31: Trouble Shooting

    17" LCD Color Monitor 177Pk 8.2 Trouble Shooting 8.2.1 Main Board No power No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Reinsert or check the...
  • Page 32 17" LCD Color Monitor 177Pk No picture (LED orange) No picture The button if under control Measure U101 PIN2=3V Check U101 X301 oscillate waveform is normal Replace X301 Check HS/VS from CN702 is normal Check Correspondent component Replace U402 Replace U402...
  • Page 33 17" LCD Color Monitor 177Pk White screen White screen Measure Q102 base X301 oscillate waveform is normal is high level? Replace X301 Check Q101, Q102, Q103 are Check reset circuit of broken or CN504 solder? U402 is normal Check Correspondent Check Correspondent component.
  • Page 34 17" LCD Color Monitor 177Pk 8.2.2 Power/Inverter Board (1) No power Check CN902 pin3/4 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C910 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin8 of IC901...
  • Page 35 17" LCD Color Monitor 177Pk 2.) W / LED, No Backlight Check CN902 pin3,4 = 12V Check adapter or MB Check ON/OFF signal Check Interface board Check IC801 pin2=5V Change Q802 or Q803 Check IC801 PIN1/15 have the output of square wave at short...
  • Page 36 17" LCD Color Monitor 177Pk 8.2.3 Keypad Board OSD is unstable or not working Connect Key Pad Board Is Key Pad Board connecting normally? Replace Button Switch Is Button Switch normally? Replace Key Pad Board Is Key Pad Board normally?
  • Page 37: White-Balance Luminance Adjustment

    = 313±20, y = 329 ±20, Y =180 cd/m 3. Into factory mode of AOC 177Pk Turn on power, press the MENU button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the left top of the panel.
  • Page 38 17" LCD Color Monitor 177Pk B. Adjust Cool color-temperature 1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM. Channel to Channel 4 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x = 296 ±20, y = 311 ±20, Y =180 cd/m 4.
  • Page 39: Monitor Exploded View

    17" LCD Color Monitor 177Pk 10. Monitor Exploded View...
  • Page 40 17" LCD Color Monitor 177Pk...
  • Page 41 17" LCD Color Monitor 177Pk...
  • Page 42: Bom List

    17" LCD Color Monitor 177Pk 11. BOM List T76CRTDBF1ACA Location Part No. Description 015G5786 1 VRSA BRACKET 019G6034 1 STOPPER PIN 040G 581 26704 SHIPPING LABEL 040G 581689 4A SERIAL LABEL FOR MONITOR 041G 68508 A CONTROL CARD 044G3231 5...
  • Page 43 17" LCD Color Monitor 177Pk Q33G0099 GM 1L LOCK HOLDER Q33G4998 GM 1L VESA COVER Q33G4999 GM 1L HINGE COVER Q33G5001 GM 1L LIFT COVER Q33G5003 GM 1L STOP MYLON Q33G5004 GM 1X LIFT BKT COVER Q33G5005 GM 1X SPRING HOLDER...
  • Page 44 17" LCD Color Monitor 177Pk C424 067G305V101 3 105 摄氏度 100UF M 16V C425 067G305V101 3 105 摄氏度 100UF M 16V C426 067G305V101 3 105 摄氏度 100UF M 16V C504 067G305V101 3 105 摄氏度 100UF M 16V C104 067G305V101 3 105 摄氏度...
  • Page 45 17" LCD Color Monitor 177Pk R518 061G0603000 RST CHIPR 0 OHM +-5% 1/10W R434 061G0603000 RST CHIPR 0 OHM +-5% 1/10W R433 061G0603000 RST CHIPR 0 OHM +-5% 1/10W R727 061G0603000 RST CHIPR 0 OHM +-5% 1/10W R726 061G0603000 RST CHIPR 0 OHM +-5% 1/10W...
  • Page 46 17" LCD Color Monitor 177Pk R522 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R521 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R520 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R511 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W R508 061G0603472 RST CHIPR 4.7KOHM +-5% 1/10W...
  • Page 47 17" LCD Color Monitor 177Pk C501 065G0603105 12 CHIP 1UF 16VX7R 0603 C705 065G0603150 31 CHIP 15PF 50V NPO C708 065G0603150 31 CHIP 15PF 50V NPO C712 065G0603150 31 CHIP 15PF 50V NPO C715 065G0603151 31 CHIP CAP 150PF 50V NPO...
  • Page 48 17" LCD Color Monitor 177Pk D704 093G 6433P BAV99 D706 093G 6433P BAV99 D714 093G 6433P BAV99 D715 093G 6433P BAV99 D716 093G 6433P BAV99 D717 093G 6433P BAV99 D718 093G 6433P BAV99 D101 093G1004 3 SS14 715G2264 1 MAIN BAORD PCB...
  • Page 49 17" LCD Color Monitor 177Pk R916 061G152M438 64 RST MOFR 0.43OHM +-5% 2WS C909 063G107K474 US 0.47UF +-10% C816 065G 3J1206ET 12PF 5% SL 3KV TDK C825 065G 3J1206ET 12PF 5% SL 3KV TDK C826 065G 3J3096ET 3PF,J,3KV,Z5P C817 065G 3J3096ET...
  • Page 50 17" LCD Color Monitor 177Pk Q805 057G 763 14 AM9945N Q806 057G 763 14 AM9945N R837 061G0805100 10 OHM 1/10W R842 061G0805100 10 OHM 1/10W R911 061G0805100 3F RST CHIPR 100KOHM +-1% 1/8W R831 061G0805100 3F RST CHIPR 100KOHM +-1% 1/8W...
  • Page 51 17" LCD Color Monitor 177Pk R912 061G1206100 RST CHIP 10R 1/4W 5% R804 061G1206103 RST CHIPR 10 KOHM +-5% 1/4W R905 061G1206103 RST CHIPR 10 KOHM +-5% 1/4W R931 061G1206103 RST CHIPR 10 KOHM +-5% 1/4W R818 061G1206150 RST CHIPR 15 OHM +-5% 1/4W...
  • Page 52 17" LCD Color Monitor 177Pk C808 065G0805682 32 MLCC 0805 CAP 6800PF K 50V X7R D801 093G 64 42 PP BAV70 SOT-23 D803 093G 64 42 PP BAV70 SOT-23 D916 093G 6432S IN4148W D915 093G 6432S IN4148W D910 093G 6432S...
  • Page 53 17" LCD Color Monitor 177Pk Q34G1841 YDA1B 30 BEZEL(17") Q40G 17N61554A RATING LABEL Q40G 58161547A AOC LOGO LABEL Q40G 58161552A POP LABEL Q44G7039 1 EPS(L) Q44G7039 2 EPS(R) Q44G7039615 1B CARTON Q44G7039BRO 1 PAPER-BLOCKED Q45G 88500 70 PE BAG FOR PALLET...
  • Page 54: Different Parts List

    17" LCD Color Monitor 177Pk 12. Different Parts List Diversity of T76CRTDBF1A2E compared with T76CRTDBF1ACA Location Part No. Description 089G 725GAA DB D-SUB 750GLC70A7P13V PANEL CLAA170EA07P 000 FZ CPT...

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