Q7C3 LCD Monitor Service Guide Engineering Specification Table of Contents 1. Introduction ...................................................................................................................................4 2. Operational Specification ..........................................................................................................4 2.1 Environment.................................................................................................................................4 2.1.
Q7C3 LCD Monitor Service Guide Engineering Specification Table of Contents 3.5.3 Power Management ........................................................................................................................................ 13 3.6 Specification of Inverter ...........................................................................................................13 3.7 Panel optical Characteristics .................................................................................................
Q7C3 LCD Monitor Service Guide Engineering Specification Table of Contents 6.3.2 Outside Cabinet, access to the following elements .................................................................................... 18 6.3.3 Cover Removal, Access ................................................................................................................................. 18 6.4 Equipment & Tools Required.....................................................................................................
Q7C3 LCD Monitor Service Guide Engineering Specification 1. Introduction This specification describes a 17.0” color TFT LCD monitor which is supported by analog interface solution and support maximum resolution 1280x1024 at 76 Hz refresh rate. It has the following features: - User controls: (a) “Power on/off” switch. (b) “Exit” key( Back to main menus or leave OSD menu and hot key of Volume adjustment). (c) “I-key”( For auto adjust vertical position, phase, horizontal position and pixel clock ).
Q7C3 LCD Monitor Service Guide Engineering Specification 2.2 Transportation 2.2.1 Vibration Test (Package, Non-Operating) A) Sine-wave vibration for initial resonance sweeps and dwell * Sine sweep Frequency (Hz) 5 ~ 26.6 26.6 ~ 50 50 ~ 500 Status 0.6G 0.016" 1.5G Sweep times: 1 sweep / Per Axis (X,Y, and Z Axis ) * One major resonance dwell is required for each axis. Total dwell time at each resonance point shall be 15 minutes. B) Random Vibration Frequency (Hz) Slope ( dB/Oct.
Q7C3 LCD Monitor Service Guide B) Engineering Specification Drop Sequence 6 1 Surface 1. Top 2. Front 3. Bottom 4. Rear 2 4 Manufacturing joint 5. Right 6.
Q7C3 LCD Monitor Service Guide Engineering Specification 20'*8'*8'6 " Steel Container Type 40'*8'*8'6" Steel 40'*8'*9'6" High Cube Steel Gross 24,000 30,480 30,480 Tare 2,370 4,000 4,200 Payload 21,630 26,480 26,280 Length 5,898 12,031 12,031 Width 2,352 2,352 2,352 Height 2,394 2,394 2,699 33.2 67.74 76.
Q7C3 LCD Monitor Service Guide Engineering Specification 2.3.3 Pallet Specification a. Dimension Transport Type Shipping Pallet Dimension (mm) Air Transport Pallet Dimension (mm) Pallet A Pallet B Pallet C Length 812 812 406 Width 836 1254 836 1254 Height 115 115 115 115 Length X X X X Width X X X X Height X X X X Pallet D 406 2.3.4 Container Carrying Capacity a.
Q7C3 LCD Monitor Service Guide Engineering Specification -DNSF compliance...EN55022, Class B. -MPR2 compliance - TCO99 -C-Tick -BSMI -EPA 2. The sample for EMI agency approval should be under 4 dB of the limit. The production pilot run units should be under 3 dB of the limit. The mass production units should be under 1 dB of the limit. 2.7 Reliability 1. The prediction MTBF of display unit shall be greater than 60,000 hours excluding the lamp.(at 25 ℃) 2.
Q7C3 LCD Monitor Service Guide 15pin D-sub female 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Engineering Specification RED VIDEO GREEN VIDEO BLUE VIDEO GROUND Cable Detect RED GROUND GREEN GROUND BLUE GROUND PC5V SYNC GROUND GROUND SDA H SYNC (H+V) V SYNC SCL 3.1.1.2 Cable length: 1600mm +/- 20mm 3.1.2 Video signals: RGB separate, Analog 0.7Vp-p/75 Ohm 3.1.
Q7C3 LCD Monitor Service Guide Engineering Specification 3.2 Function 3.2.1 Support timing This Interface board is designed to operate in any of the following video mode. Incoming display mode (Input timing) Resolution Multi-scan operation Horizontal Vertical Dot Clock Remark Frequency (KHz) Frequency (Hz) Frequency (MHz) 640x350 31.47(P) 70.08(N) 25.17 DOS 720x400 31.47(N) 70.08(P) 28.32 DOS 640x480 31.47(N) 60.00(N) 25.18 DOS 640x480 35.00(N) 67.00(N) 30.24 Macintosh 640x480 37.
Q7C3 LCD Monitor Service Guide Engineering Specification Notes: (1) If the incoming display mode is not supported by this I/F board listed above, the picture can show up or doesn’t which is unpredictable, even the picture can display but probably isn’t good or clear. (2) Some signals from graphics board may not function properly. (3) “P”, “N” stands for “Positive”, “Negative” polarity of incoming HSYNC/VSYNC(input timing).
Q7C3 LCD Monitor Service Guide Engineering Specification 70% minimum (measuring at 115Vac and full load) Power saving mode < 1 Watts at 115vac 3.5.2 Output Power Requirement The power circuit shall supply DC power outputs as followings: Output Nominal 1 2 5V-panel 3.3V-Fix Regulation ±10% ±5% Load Current Range 0 ~ 1.0A 0 ~ 1.0A 3.5.
Q7C3 LCD Monitor Service Guide Engineering Specification 3.7 Panel optical Characteristics Item Viewing Angle Unit [degree] Contrast ratio Response Time (Note 1) [msec] Color / Chromaticity Coordinates (CIE) Color Coordinates (CIE) White White Luminance @ CCFL 7.0mA (center) Luminance Uniformity (Note 2) Crosstalk (in 75Hz) (Note 3) [cd/m2] Conditions Horizontal (Right) CR = 10 (Left) Vertical (Up) CR = 10 (Down) Horizontal (Right) CR = 5 (Left) Vertical (Up) CR = 5 (Down) Min.
Q7C3 LCD Monitor Service Guide Engineering Specification 4. Response time TrR measures the transition time of L1 relative luminance from white to black state, from 90% to 10% (see graph below) TrD measures the transition time of L1 relative luminance from black to white state, from 10% to 90% (see graph below) BLACK WHITE WHITE 100% 90% 10% 0% t TrR TrD 5. Cross talk shall be measured between two patterns.
Q7C3 LCD Monitor Service Guide Brightness Uniformity = Min. brightness Engineering Specification / Max. brightness x 100 % > 70% 4. Functional specification All the tests to verify specifications in this section must be performed under the following standard conditions unless otherwise noted. The standard conditions are: -Temperature : 0 to 40 degree Celsius -AC line input voltage : 90 Vac to 264 Vac, 47Hz or 63Hz -Warm-up time : 30 minutes minimum 4.1 Display Quality 4.1.
Q7C3 LCD Monitor Service Guide Engineering Specification 5. Physical Specifications 5.1 Physical Dimension & Appearance 5.1.1 Overall Dimensions: 375mm (W) X 370mm (H) X 155mm (D) 5.1.2 Outer Appearance: see Fig.1 5.2 Construction and Materials on outer surface (1) Materials: Plastic (2) Color: To be defined for Model 5.3 Base (1)Tilt: fiest hinge:0°~ 25° 5.4 Marking & Labels 5.4.1 Reference Label (Rear panel) (1) Reference numbers (2) Manufacture data (3) Agency Approvals (4) Power Ratings 5.4.
Q7C3 LCD Monitor Service Guide Engineering Specification 6.3 Accessibility 6.3.1 General: All panels, covers, and major assemblies are removable without disruption of permanent mounting or fasteners. 6.3.2 Outside Cabinet, access to the following elements -Operating Controls -AC Inlet -Audio in 6.3.3 Cover Removal, Access All sub assemblies and internally adjustable components may be accessed by removing the base and the rear cover . 6.4 Equipment & Tools Required 6.4.
Q7C3 LCD Monitor Service Guide Engineering Specification Fig.
BENQ LCD FP767-12 Q7C3 Spare Parts List P/N: 99.L9072.RBA/RBE ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 DESCRIPTION PCBA I/F BD Q7C3-12MS AU IC FLASH MTV312MV64 (AJ) PLCC4 IC LVDS/RSDS MVPRL-HN PQPF 160P IC EEPROM AT24C04N-10SI-2.
Q7C3 LCD Monitor Service Guide Alignment Procedure 1. Alignment procedure (for function adjustment) A. Preparation: 1. Setup input timing ICL-605, 32-Grays pattern. 2. Setup unit and keep it warm up at least 30 minutes. B. Timing adjustment: 1. Enter factory setting area (press “LEFT”, “EXIT” and then press “SOFTPOWER”). 2. Check the settings to following values: Contrast = 50 Brightness = 90 Volume = 30 OSD time = 20 Color = sRGB Language = English Then, turn off the monitor power. 3.
Q7C3 LCD Monitor Service Guide Alignment Procedure 4. Turns off the monitor power. E. Writing EDID file: 1. Setup a PC with DDC card. 2. Connect PC to monitor with a D-sub signal cable. 3. Please refer to the C212 for the correct EDID file. 4. Runs the writing program to write the EDID file into EEPROM for analog input, ie. 15-pin D-sub. 5. Read both EEPROM data and confirm it to match with the C212 document definition.
Q7C3 LCD Monitor Service Guide Alignment Procedure F.
Q7C3 LCD Monitor Service Guide Alignment Procedure Read User R-Gain data from NVRAM A3 6C XX checksum Read User G-Gain data from NVRAM A3 6D XX checksum Read User B-Gain data from NVRAM A3 6E XX checksum Change Color Temperature to C1 CC 1 XX checksum Change Color Temperature to C2 CC 2 XX checksum Change Color Temperature to C3 CC 3 XX checksum Change C/T to User CC 4 XX checksum User mode to factory mode 1A 5A XX checksum Auto Color (Offset1, Offset2, Gain) 1B 5A
Q7C3 LCD Monitor Service Guide Alignment Procedure 2. Dressing A. Check the two spring on the BKT B.
Q7C3 LCD Monitor Service Guide Alignment Procedure C. Plastic fixture on the interface board D.
Q7C3 LCD Monitor Service Guide Alignment Procedure E. Tapes on backlight wire F.
Q7C3 LCD Monitor Service Guide Alignment Procedure G. Two gaskets at the bottom of BKT H.
Q7C3 LCD Monitor Service Guide Alignment Procedure I. Backlight wire J.
Q7C3 LCD Monitor Service Guide Alignment Procedure K. Two screws on panel right side L.
Q7C3 LCD Monitor Service Guide Alignment Procedure M. Two speakers fixed on BZL N.
Q7C3 LCD Monitor Service Guide Alignment Procedure O. Control board 3pin wire dressing P.
Q7C3 LCD Monitor Service Guide Alignment Procedure Q.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory I. Introduction: The Q7C3 (FP756) is a 17” SXGA (1280x1024) , 262 K colors(R, G, B 6-bit data) TFT LCD monitor without multi-media function. It’s an analog interface LCD monitor with a 15 pins D-sub signal cable and it’s compliant with VESA specification to offer a smart power management and power saving function.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory (a) Circuit operation theory: A basic operation theory for this interface board is to convert analog signals of Red, Green, Blue. The scaling IC has internal A/D converter, internal OSD and auto detect input timing functions. A/D converter is convert analog signal to digital data. OSD is offering adjustable functions to end-user. Detect timing is for detect change mode.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory control unit, it controls all the functions of this interface board, just like the OSD display setting, the adjustable items, adjusted data storage, the external IIC communication, support DDC2B. 3.) EEPROM: We use 24C16 to store all the adjustable data and user settings. 4.) FLASH ROM: To stored the source code which is accessed by MCU to run program. A-2.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory Fig. 2 #2 Rectifier and filter AC Voltage (90-264V) is rectified and filtered by BD601, C605 (See Fig 3) and the DC Output voltage is 1.4*(AC input). (See Fig.3) Fig.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory #3 Switching element and Isolation power transformer When the Q601 turns on, energy is stored in the transformer. During Q601 turn-off period, the stored energy is delivered to the secondary of transformer. R607, C607 and D601 is a snubber circuit. R615 is current sense resistor to control output power. (See Fig.4) Fig. 4 #4 Rectifier and filter D701 and C703 are to produce DC output. L701 and C704 are to suppress high Frequency switching spikes.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory #5 PWM Controller The PWM controller NCP1200A implements a standard current mode architecture. With an internal structure operating at a fixed 40KHz. Where the switch time is dictated by the peak current set-point. When the current set-point falls below a given value. The output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency. Fig.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory #7.Audio Speaker: Connect with PC Audio output Connect with 8 ohm/2W Speaker DC POWER INPUT AUDIO INPUT POWER IC TDA7496 The Audio Speaker is consisting of an Audio board. The Audio Speaker has DC Volume control, use 28mmX40mm Speaker (2W/per channel), power supply from AC-DC board and Audio input from PC Audio output (Line Out). (A) Power IC: Use ST POWER IC TDA7496.The IC are stereo Class AB output amplifiers with DC Volume control.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory A-3.) Control board introduction: The main parts of the control board are a push button, and a LED. (a) Push button: It’s a simple switch function, pressing it for “ON” to do the auto adjustment function, releasing it for “OFF” to do nothing. (c) LED: It indicates the DPMS status of this LCD monitor; green light means DPMS on (Normal operating condition). Amber light means DPMS off (Power off condition).
Q7C3 LCD Monitor Service Guide Circuit Operation Theory A-4.) Inverter diagram: 1.Block Diagram: ON/OFF OSCILATOR switching CIRCUIT TRANSFORMER CCFL 15Vin ON/OFF PWM CONTROLLER PROTECTION TL1451 CIRCUIT AND DETECT BRT_ADJ 2. General Specification Input Voltage: 15V Input Current: 2A max. ON/OFF Voltage: 3.3V PWM Duty: 3.3V/47KHz Output Requirement: Max. Output Current: 15mA Min.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory 3.Circuit Operation Theorem 3.1 ON/OFF SWITCH The turn-on voltage was controlled by R756 and R757.The inverter was turned on or off by the switching transistors Q761 and Q757, Also regulator IC751 is control by Q761 and Q757 decide supply 15V to inverter part or instead.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory 3.2 PWM Control circuit TL1451 is a dual PWM controller.C765 and R765 decide the working frequency.BLT_ADJ signal is from control board, control pulse width then decide how much energy delivery to CCFL also decide CCFL brightness. Q741 and Q742 be the buffer to rise the drive capability and the totem poles circuit can improve a capable of driving for Q743.C770 decide the striking time delay.
Q7C3 LCD Monitor Service Guide Circuit Operation Theory 3.3 Oscillator Circuit Royer circuit uses the characteristic of transformer saturation to oscillate. When the DC power inject, Q759 or Q760 will turns on, and the current Ic increases. After a period, the transistor will leave the saturation status and Vce increase. The result causes the voltage of primary coil get lower. Finally the transistor turn off, and another transistor turn on.
5 4 3 2 1 D D Screw Holes Optical Points C 5 9 5 4 8 4 8 3 7 3 2 6 2 1 9 1 5 1 1 GND 9 5 4 8 4 8 7 3 7 3 7 6 2 6 2 6 H1 H2 H3 H4 HOLE-V8 HOLE-V8 HOLE-V8 HOLE-V8 GND GND GND_SIGNAL OP1 OP 9 OP2 OP OP3 OP OP4 OP OP5 OP OP6 OP OP7 OP C OP8 OP OP9 OP OP10 OP OP11 OP OP12 OP OP13 OP OP14 OP GND B B Benq Corporation Project Code Model Name OEM/ODM Model Name Q7C3-LG 99.L9072.001 NA Title A A INTERFACE BOARD Size PCB P/N 48.
5 4 3 2 1 J1 1 3 5 7 9 11 13 BRT_ADJ Power_OFF L3 +5V D 80 OHM VOL_ADJ 2 4 6 8 10 12 14 BL_ON OPEN(80 OHM) L1 +12V L4 80 OHM D V33 VOL_ON 1 C8 OPEN(0.1U K) + 1 C6 OPEN (22U) 16V + C9 OPEN(0.1U K) C2 0.1U K C12 + 22U 16V C3 0.1U K C13 0.1U K 2 2 C11 0.1U K C5 OPEN (22U) 16V 2 C7 + 22U 16V 2 C10 0.1U K 1 C4 0.1U K 1 2072060207 C1 0.1U K GND C V33 V18 C V18A U1 G952T63U 3 VOUT1 2 VOUT2 4 FB1 GND C17 0.1U K R1 GND OPEN(80 OHM) C14 + 22U 16V C15 0.
5 4 3 2 1 2 1 BAV99 2 DN3 3 1 DN2 3 BAV99 1 D DN1 3 BAV99 2 V33 D GND PC5V V33 DN4 1 3 PC5V TP1 PC5V BAV70LT1 1 16 12 TP8 13 TP11 14 TP5 15 R17 2.7K J4 6 1 7 2 8 3 9 4 10 5 11 TP3 TP2 A0 VCC A1 WP 7 R18 47 R19 47 VSS SDA 5 C25 0.047U K BLUE+ C TP7 TP9 TP10 TP301 R302 100 D301 GND TZMC5V1 1 SCL 4 R13 22 75 TP6 17 A2 6 B+ ISOG TP4 (NO SCREW) 3 GREEN+ 1000P K R15 2024012015 2 C24 0.047U K 2 R16 2.
A B C D E PV1 GND R33 3.3K V33 V33 V33 R32 0 V33 A[19:1] TESTEN C33 3900P K R36 3.3K C36 0.039U K 23 GFILT RED GREEN+ 43 GREEN ISOG 44 SOG BLUE+ 50 BLUE VS 64 VS 4 65 HS HS 7 8 NC2 NC3 10 11 NC4 NC5 RX0P RX0M 13 14 NC6 NC7 RXCP RXCM 16 17 NC8 NC9 5 NC1 RTERM OPEN PD0 PD1 PD2 PD3 PD4 PD5 PD6 V33 L0805 OPEN(80 OHM) 3.
5 4 3 2 1 V33 D[15:0] V33 C68 0.1U K R503 V33 D V33 IC1 ROMOEn ROMWEn RESETn A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 26 28 11 12 14 47 CE OE WE RP WP BYTE 25 24 23 22 21 20 19 18 8 7 6 5 4 3 2 1 48 17 16 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 VPP 13 VCC 37 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 29 31 33 35 38 40 42 44 30 32 34 36 39 41 43 45 GND1 GND2 46 27 1 2 3 4 R52 3.3K C70 0.
5 4 3 2 1 D D CON1 R602 100 LED_BLU LED_ORG TP26 R601 100 1 2 3 4 5 6 7 8 9 TP27 1K L5 L6 L7 L8 L9 L10 KEY_INC ENTER EXIT KEY_DEC PW_SW I-KEY 240 OHM 240 OHM 240 OHM 240 OHM 240 OHM 240 OHM R61 TP28 TP29 R62 1K R63 1K TP30 TP31 R64 1K R65 1K 2060091109 TP32 TP33 R66 1K C C C72 100P 50V J C73 100P 50V J C74 100P 50V J C75 100P 50V J C76 100P 50V J C77 100P 50V J C78 0.1U K C79 0.1U K R67 0 GND_SIGNAL V33 V33 B C81 0.
5 4 3 2 1 CN1 D POL XSTB YCLK Y DIO BXDIO FXDIO Y OE PD0 PD1 PD2 PD3 PD4 PD5 PD6 +5V R79 0 U9 C 1 S T.L. D 8 2 S D 7 3 S D 6 G D 5 LCD_PW 1 R80 100K D9 1 4 2 2 + OPEN(30V) C82 47U 16V C83 0.1U K 3 GF4435 R81 10K Q5 2N3904 1 2 + C701 0.
5 4 3 2 1 D D Screw Holes Optical Points C 5 9 5 4 8 4 8 3 7 3 2 6 2 1 9 1 5 1 1 GND 9 5 4 8 4 8 7 3 7 3 7 6 2 6 2 6 H1 H2 H3 H4 HOLE-V8 HOLE-V8 HOLE-V8 HOLE-V8 GND GND GND_SIGNAL OP1 OP 9 OP2 OP OP3 OP OP4 OP OP5 OP OP6 OP OP7 OP C OP8 OP OP9 OP OP10 OP OP11 OP OP12 OP OP13 OP OP14 OP GND B B Benq Corporation Project Code Model Name OEM/ODM Model Name Q7C3 99.L9072.001 NA Title A A INTERFACE BOARD Size PCB P/N 48.
5 4 3 2 1 J1 1 3 5 7 9 11 13 BRT_ADJ Power_OFF L3 +5V D 80 OHM VOL_ADJ 2 4 6 8 10 12 14 BL_ON OPEN(80 OHM) L1 +12V L4 80 OHM D V33 VOL_ON 1 C8 OPEN(0.1U K) + 1 C6 OPEN (22U) 16V + C9 OPEN(0.1U K) C2 0.1U K C12 + 22U 16V C3 0.1U K C13 0.1U K 2 2 C11 0.1U K C5 OPEN (22U) 16V 2 C7 + 22U 16V 2 C10 0.1U K 1 C4 0.1U K 1 2072060207 C1 0.1U K GND C V33 V18 C V18A U1 G952T63U 3 VOUT1 2 VOUT2 4 FB1 GND C17 0.1U K R1 GND OPEN(80 OHM) C14 + 22U 16V C15 0.
5 4 3 2 1 2 1 BAV99 2 DN3 3 1 DN2 3 BAV99 1 D DN1 3 BAV99 2 V33 D GND PC5V V33 DN4 1 3 PC5V TP1 PC5V BAV70LT1 1 16 12 TP8 13 TP11 14 TP5 15 R17 2.7K J4 6 1 7 2 8 3 9 4 10 5 11 TP3 TP2 A0 VCC A1 WP 7 R18 47 R19 47 VSS SDA 5 C25 0.047U K BLUE+ C TP7 TP9 TP10 TP301 R302 100 D301 GND TZMC5V1 1 SCL 4 R13 22 75 TP6 17 A2 6 B+ ISOG TP4 (NO SCREW) 3 GREEN+ 1000P K R15 2024012015 2 C24 0.047U K 2 R16 2.
A B C D E PV1 GND R33 3.3K V33 V33 V33 R32 0 V33 A[19:1] TESTEN C33 3900P K R36 3.3K C36 0.039U K 23 GFILT RED GREEN+ 43 GREEN ISOG 44 SOG BLUE+ 50 BLUE VS 64 VS 4 65 HS HS 7 8 NC2 NC3 10 11 NC4 NC5 RX0P RX0M 13 14 NC6 NC7 RXCP RXCM 16 17 NC8 NC9 5 NC1 RTERM OPEN PD0 PD1 PD2 PD3 PD4 PD5 PD6 V33 L0805 OPEN(80 OHM) 3.
5 4 3 2 1 V33 D[15:0] V33 C68 0.1U K R503 V33 D V33 IC1 ROMOEn ROMWEn RESETn A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 26 28 11 12 14 47 CE OE WE RP WP BYTE 25 24 23 22 21 20 19 18 8 7 6 5 4 3 2 1 48 17 16 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 VPP 13 VCC 37 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 29 31 33 35 38 40 42 44 30 32 34 36 39 41 43 45 GND1 GND2 46 27 1 2 3 4 R52 3.3K C70 0.
5 4 3 2 1 D D CON1 R602 100 LED_BLU LED_ORG TP26 R601 100 1 2 3 4 5 6 7 8 9 TP27 1K L5 L6 L7 L8 L9 L10 KEY_INC ENTER EXIT KEY_DEC PW_SW I-KEY 240 OHM 240 OHM 240 OHM 240 OHM 240 OHM 240 OHM R61 TP28 TP29 R62 1K R63 1K TP30 TP31 R64 1K R65 1K 2060091109 TP32 TP33 R66 1K C C C72 100P 50V J C73 100P 50V J C74 100P 50V J C75 100P 50V J C76 100P 50V J C77 100P 50V J C78 0.1U K C79 0.1U K R67 0 GND_SIGNAL V33 V33 B C81 0.
5 4 3 2 1 CN1 D POL XSTB YCLK Y DIO BXDIO FXDIO Y OE PD0 PD1 PD2 PD3 PD4 PD5 PD6 +5V R79 0 U9 C 1 S T.L. D 8 2 S D 7 3 S D 6 G D 5 LCD_PW 1 R80 100K D9 1 4 2 2 + OPEN(30V) C82 47U 16V C83 0.1U K 3 GF4435 R81 10K Q5 2N3904 1 2 + C701 0.
Q7C3 LCD Monitor Service Guide Trouble Shooting Q7C3 TROUBLE SHOOTING GUIDE No Display or display is unstable: 1.1 Interface Board: No picture or picture unstable Power off Yes Turn on power No Does cable plugs in No Check all of wire then turn on power connector? switch again.
Q7C3 LCD Monitor Service Guide Trouble Shooting 2. BUTTON function: 2.
Q7C3 LCD Monitor Service Guide Trouble Shooting 3.
Q7C3 LCD Monitor Service Guide Trouble Shooting 4. Power Board Backlight didn't shine Y Check IC751 Y IC751 PIN 9 IS 1416V? N LED shined? N N Plug CN701 again or checking I/F BD Y PWM existed? (BLT_ADJ) 3.