User manual ASUS VW224UVW224S SERVICE MANUAL

[. . . ] Service Manual ASUS VW224U&VW224S LCD Monitor Service Manual Model: ASUS VW224U&VW224S SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL, D 1 Service Manual ASUS VW224U&VW224S Index Revision Lists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Important Safety Notice. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1. Monitor Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. [. . . ] INPUT Friday , May 23, 2008 Date 25 Service Manual VCC1. 8 FB401 AVDD_1. 8 AVDD_3. 3 VDDC_1. 8 VDDP_3. 3 2 VCC1. 8 0R05 1/10W 5% C403 10uF/16V + C404 C405 0. 1uF/16V 0. 1uF/16V 50 76 110 126 40 51 62 64 65 67 112 119 8 14 20 21 52 VCC1. 8 VCTRL 109 2 VCC1. 8 C416 69 70 71 72 73 74 77 78 79 80 81 82 83 84 85 86 87 88 90 91 92 93 94 95 96 97 98 99 100 101 103 104 105 106 107 108 113 114 115 116 2 37 48 68 118 120 121 122 123 124 125 3 4 R411 R418 R420 100R 1/16W 5% POWER 100R 1/16W 5% KEY 1 100R 1/16W 5% KEY 2 DET_INPUT 3 R422 R423 R405 22K 1/16W 5% Q402 MMBT3904 R406 10K 1/16W 5% AUDIO_MUTE HDCP_RST 3 2 C422 0. 1uF/16V 4K7 1/16W 5% 4K7 1/16W 5% DDC_WP 3 PA14 PA15 PA16 PA17 PA18 PA19 PA8 PA9 PA10 PA11 PA12 PA13 PA2 PA3 PA4 PA5 PA6 PA7 PB12 PB13 PB14 PB15 PB18 PB19 PB20 PB21 PB22 PB23 PB6 PB7 PB8 PB9 PB10 PB11 PB0 PB1 PB2 PB3 PB4 PB5 R488 R499 WP 100R 1/16W 5% 100R 1/16W 5% PB[12. . 15] 0. 1uF/16V FB405 AVDD_1. 8 BEAD 120 OHM C406 0. 1uF/16V VDDC_1. 8 ASUS VW224U&VW224S C402 0. 1uF/16V AVDD_33 AVDD_33 AVDD_33 AVDD_18 R489 10K 1/16W 5% 3 3 3 R490 3 10K 1/16W 5% 3 3 3 3 3 RIN GNDR GIN GNDG SOG BIN GNDB HSY NC VSY NC 3 3 DDCA_SDA DDCA_SCL 3 R+ 3 R3 G+ 3 G3 B+ 3 B3 CLK+ 3 CLK3 DDCD_SDA 3 DDCD_SCL 28 27 25 24 26 23 22 32 33 35 36 9 10 12 13 15 16 18 19 5 6 RIN0P RIN0M GIN0P GIN0M SOGIN0 BIN0P BIN0M HSY NC0 VSY NC0 DDCA_SDA/RS232_TX DDCA_SCL/RS232_RX B+ BG+ GR+ RCK+ CKDDCD_SDA DDCD_SCL AVDD_MEMPLL/VDDP VDDC VDDC VDDC VDDC VDDP VDDP VDDP VDDP VDDP VDDP VDDP VDDP VCC3. 3 NC/BA1P NC/BA1N NC/BA2P NC/BA2N LLV6N/BA3P LLV6P/BA3N LLV5N/GA1P LLV5P/GA1N LLV4N/GA2P LLV4P/GA2N LLV3N/GA3P LLV3P/GA3N LLV2N/RA1P LLV2P/RA1N LLV1N/RA2P LLV1P/RA2N LLV0N/RA3P LLV0P/RA3N RLV6N/CLKAP RLV6P/CLKAN RLV5N/CLKBP RLV5P/CLKBN RLV4N/BB1P RLV4P/BB1N RLV3N/BB2P RLV3P/BB2N RLV2N/BB3P RLV2P/BB3N RLV1N/GB1P RLV1P/GB1N RLV0N/GB2P RLV0P/GB2N NC/GB3P NC/GB3N NC/RB1P NC/RB1N NC/RB2P NC/RB2N NC/RB3P NC/RB3N BA1P PA[14. . 19] PA[14. . 19] 5 VCC3. 3 GA1P PA[8. . 13] PA[8. . 13] 5 2 VCC3. 3 C408 10uF/16V + FB403 BEAD 120 OHM VDDP_3. 3 RA1P PA[2. . 7] PA[2. . 7] 5 C409 C410 C411 C412 C413 C419 C420 C456 C457 0. 1uF/16V 0. 1uF/16V 0. 1uF/16V 0. 1uF/16V 0. 1uF/16V 0. 1uF/16V 0. 1uF/16V 0. 1uF/16V 0. 1uF/16V CLKAP PB[12. . 15] 5 2 VCC3. 3 C407 BB1P PB[18. . 23] PB[18. . 23] 5 0. 1uF/16V C414 0. 1uF/16V C415 0. 1uF/16V VCC3. 3 FB402 AVDD_3. 3 BEAD 120 OHM AVDD_3. 3 7 R403 390 OHM 1/16W C401 0. 1uF/16V 31 30 REXT REFP REFM TSUMU5RBWHQ-LF VCC3. 3 +5V 8 7 3 4 WP 117 D427 NC R404 10K 1/16W 5% R487 10K 1/16W 5% C421 27pF R407 0R05 1/16W 128 X401 14. 31818MHz 127 C423 27pF R410 0R05 1/16W 102 C458 0. 1uF/16V +5V 34 R486 NC U406 2 D428 NC C431 NC 1 VCC RESET GND 3 R415 10K 1/16W 5% MODE BY PASS XOUT XIN RST U402 SDO VDD HOLD# CE# WP# SCK VSS SDI PM25LV010A 2 1 6 5 41 42 43 44 GB1P PB[6. . 11] PB[6. . 11] 5 +5V +5V C417 0. 22uF + C418 10uF/16V SDO CSZ SCK SDI Add R431 - Max 20071003 R431 10K 1/16W 5% VCC3. 3 VCC3. 3 RB1P PB[0. . 5] adj_BACKLIGHT 2 VCM_PWM 5 on_PANEL 5 R433 4K7 1/16W 5% PB[0. . 5] 5 GPIO_P14/PWM0 GPIO_P23/PWM1 GPIO_P24/PWM2 GPIO_P04 GPIO_P25 GPIO_P00/SAR0 GPIO_P01/SAR1 GPIO_P02/SAR2 GPIO_P03/SAR3 GPIO_P06 GPIO_P07 GPIO_P15 GPIO_P16 VOLUME 2 R413 10K 1/16W 5% R408 10K 1/16W 5% Q406 MMBT3904 Q401 MMBT3906 R421 LED_G 470R 1/16W 5% Q403 MMBT3906 R419 LED_A 470R 1/16W 5% on_BACKLIGHT 2 VCC3. 3 GPIO_P44 GPIO_P43 GPIO_P42 I2C_MCL I2C_MDA 45 46 47 39 38 R483 MWP MSCL MSDA 100R 1/16W 5% R475 ESP 5 OSP 5 GPO[0. . 5] 5 3. 9K OHM 1% 1/16W KEY 1 KEY 2 POWER LED_G LED_A R474 3. 9K OHM 1% 1/16W 1 2 3 4 5 6 CN403 NC/LM810M3X-4. 0 53 54 61 60 59 58 57 56 55 ESP OSP GPO0 GPO1 GPO2 GPO3 GPO4 GPO5 GPO[0. . 5] ESP OSP GPO[0] GPO[1] GPO[2] GPO[3] GPO[4] GPO[5] GPO[6] Re s e t Circuit GND GND GND GND GND GND GND GND GND GND C426 C427 C428 C429 D401 C430 D402 CONN UDZSNP5. 6B 0. 1uF/16V 0. 1uF/16V 0. 1uF/16V 0. 1uF/16V UDZSNP5. 6B 0. 1uF/16V 1 11 17 29 49 63 66 75 89 111 VCC3. 3 C425 R424 10K 1/16W 5% MWP MSCL MSDA R425 10K 1/16W 5% R426 10K 1/16W 5% R427 R428 R429 U403 1 2 3 4 0. 22uF 8 100R 1/16W 5% VCC NC 7 100R 1/16W 5% WC E1 6 100R 1/16W 5% SCL E2 5 SDA VSS AF24BC16-SI 16K TPV ( Top Victory Electronics Co . ) OEM MODEL VW224S TPV MODEL TCR2MPN8WY U2AI PCB NAME Sheet 715G2670-1-2 4 of 5 Size Rev C 1 <> Key Component G2670-1-2-X-9-080110 4. SCALER Friday , May 23, 2008 Date 26 Service Manual CN407 PA[2. . 7] PA2 PA3 PA4 PA5 PA6 PA7 4 PA[8. . 13] PA[8. . 13] PA8 PA9 PA10 PA11 PA12 PA13 4 PA[14. . 19] PA[14. . 19] PA14 PA15 PA16 PA17 PA18 PA19 PB[0. . 5] PB0 PB1 PB2 PB3 PB4 PB5 4 PB[6. . 11] PB[6. . 11] PB6 PB7 PB8 PB9 PB10 PB11 PB[18. . 23] BG0P BG0N BG1P BG1N BG2P BG2N BR0P BR0N BR1P BR1N BR2P BR2N FB0P FB0N FB1P FB1N FB2P FB2N FG0P FG0N FG1P FG1N FG2P FG2N BCKN BCKP FR0P FR0N FR1P FR1N FR2P FR2N BR2N BR2P BR1N BR1P BR0N BR0P BG2N BG2P BG1N BG1P BG0N BG0P BB2N BB2P BB1N BB1P BB0N BB0P FR2N FR2P FR1N FR1P FR0N FR0P FG2N FG2P FG1N FG1P FG0N FG0P FB2N FB2P FB1N FB1P FB0N FB0P 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 4 PA[2. . 7] ASUS VW224U&VW224S VCM_PWM VCM_PWM1 1 STB1 STB 1 POL1 POL 1 FSTH1 FSTH 1 BSTH1 BSTH 1 4 PB[0. . 5] STV1 STV 1 FCKN FCKP CKV1 CKV 1 4 PB[18. . 23] BSTH FSTH POL STB STV CKV OE GVOFF 4 VCM_PWM OE1 OE 1 GVOFF1 GVOFF 1 PB18 PB19 PB20 PB21 PB22 PB23 BB0P BB0N BB1P BB1N BB2P BB2N +5V FB421 120 OHM 1 2 R491 390R 1/8W 4 PB[12. . 15] PB[12. . 15] PB12 PB13 PB14 PB15 FCKP FCKN BCKP BCKN R494 10K 1/16W 5% GPO0 GPO1 GPO2 GPO3 GPO4 GPO5 POL STB STV CKV OE GVOFF + C461 100uF/16V R493 10K 1/16W 5% R496 4K7 1/16W 5% on_PANEL C464 NC C462 0. 1uF/16V CONN 4 GPO[0. . 5] GPO[0. . 5] R495 51K OHM 1/16W Q412 AM2321P C463 +5V R491 => 390_ohm (0805) Panel Side: Port Back & Port Front "R & B" SWAP Data "P & N" SWAP CLK "P & N" SWAP Q411 MMBT3906 1uF 10V C465 0. 1uF/16V R497 10K 1/16W 5% 4 4 OSP ESP OSP ESP FSTH BSTH TPV ( Top Victory Electronics Co . ) OEM MODEL VW224S TPV MODEL TCR2MPN8WY U2AI PCB NAME Sheet 715G2670-1-2 5 of 5 Size Rev B 1 <> Key Component G2670-1-2-X-9-080110 5. PANEL INTERFACE Friday , May 23, 2008 Date 27 Service Manual 5. 2 Power Board 715G2538-1-ACE 100 1/4W R918 ASUS VW224U&VW224S 1K 1/4W 1K 1/4W 1K 1/4W 100 1/4W R919 100 1/4W R920 C912 0. 001uF C917 680uF25V 3 D906 SP10100 R935 100 1/4W 3 C929 0. 001uF 1 D905 SB1060FCT L903 1. 1uH + C915 470uF16V C916 0. 1uF + + L904 1. 1uH R923 R921 C918 680uF25V + R922 R928 1K 1/4W ZD902 RLZ16B R929 1K 1/8W 2 F902 0R05 1/4W +14V T901 100K 2W 4 9 1 C922 NC 2 ZD901 NC BD901 KBP208G 3 C938 1500pF 2KV + C905 120uF/450V R908 1 Q902 PMBS3904 C910 0. 001uF R936 NC 1 R904 4K7 1/4W R905 NC C906 1500pF 2KV 5 7 2 + R932 4K7 1/4W R906 NC R909 10R 1/4W D900 PR1007R - 6 4 11 10 R961 100 1/4W R967 0R05 1/4W +5V ! C907 0. 1uF 4 VCC D901 PS102R + C904 0. 22uF/275V 6 1 1 R962 100 1/4W 8 C908 22uF/50V 2 R933 4K7 1/4W 8 7 6 5 R907 NC FB901 BEAD D903 BAW56DIODES 3 12 POWER X'FMR D907 NC + R924 C939 1000uF25V 1K5 1/10W R940 33K 1/10W C902 0. 001uF/250V ! C901 0. 001uF/250V 1 2 3 4 Vcc DRAIN GND HVS PROTECT DRIVER CTRL SENSE IC901 TEA1530AT 2 2 FG C911 0. 22uF/25V 1 L901 2 R915 220K 1/8W R910 R938 10R 1/4W R917 10K 1/8W 1K 1/8W R912 22K 1% 1/8W Q901 STP10NK70ZFP ! 2 ZD921 RLZ16B IC903 PC123X2Y FZOF R925 1K 1/10W 1% 1 1 ZD922 RLZ5. 1B R927 3. 6K 1% 1/10W 4 3 2 1 C924 0. 1uF/25V D915 LL4148WP D916 LL4148WP 4 26mH 3 ! R911 1K 1/8W R913 NC C909 0. 22uF/50V R914 0. 22 2W IC904 KIA431A-AT/P R926 3. 6K 1% 1/10W R942 1K 1/10W 1% R916 4K7 1/8W R930 2. 4K 1% 1/10W R931 8K2 1/8W C928 0. 0012uF C921 0. 0047UF/400V 9 8 7 6 5 4 3 2 1 C903 0. 47uF/275V R903 510K 1/4W R902 R901 510K 1/4W 510K 1/4W +5V +12V HS1 HEAT SINK(D906) 1 2 1 2 HS4 090G6276 1 CN902 WIRE HARNESS C931 0. 1uF C930 0. 1uF t NR901 NTCR VAR901 NC 4. 0A/250V F901 FUSE 3 1 2 HS3 HEAT SINK(Q901) 1 2 GND1 GND DIM ! ON/OFF FG 1 FG 2 TPV CN901 SOCKET ( Top Victory Electronics Co . ) OEM MODEL 20/22'LCD TPV MODEL PCB NAME Sheet PWPC8C42MQF1 715G2538 1 ACE 2 of 3 Size Rev B 4 <> Key Component G2538-4-X-X-35-080716 02. POWER Wednesday , July 16, 2008 Date 28 Service Manual R855 15 1/4W C839 1500pF T801 POWER X'FMR 1 8 E 3 C B 4 3 + C802 C824 470UF/25V 0. 1uF Q802 P5506 4 R839 Q804 PMBS3906 1 0 1/8W R823 3. 6K 1/8W R857 C840 15 1/4W 1500pF 1 T802 POWER X'FMR 8 3 2 3 2 1 G S G S D D D D 5 6 7 8 C838 1500pF 2 D805 BAW56 1 R817 10K 1/10W ASUS VW224U&VW224S 2 1 R821 1K 1/10W 1% 2 C819 0. 0022uF C801 10pF/6KV 9 R801 1K 1/10W 1% 3 1 D801 BAV99 CN801 CONN F801 0R05 1/4W +12V 3. 6K 1/10W R819 Q801 PMBS3904 R804 100 1/8W R856 15 1/4W 7 Q805 PDTC144WK ON/OFF C807 0. 1uF/25V Q808 PDTA144WK 2 1 R828 10K 1/10W R822 1K 1/10W 1% 2 C823 0. 0022uF 3 1 R814 1K 1/10W 1% 4 3 C811 10pF/6KV 9 E 3 C B 2 1 R833 10K 1/10W R809 1K 1/10W 1% 2 C815 0. 0022uF 3 1 R815 1K 1/10W 1% D803 BAV99 CN803 CONN D802 BAV99 CN802 CONN Q811 PMBS3904 R850 Q812 PMBS3906 1 0 1/8W 2 + C803 470UF/25V C805 0. 1uF R858 15 1/4W 7 2 D808 BAW56 1 DIM 4 R827 01/10W 3 2 1 Q803 P5506 G S G S D D D D 3 5 6 7 8 C841 1500pF Q806 PMBS3904 R853 68K 1% 1/10W 2 1 R834 10K 1/10W R812 1K 1/10W 1% 2 C816 0. 0022uF 3 1 R816 1K 1/10W 1% D804 BAV99 CN804 CONN C835 NC D817 LL4148WP R808 10K 1/10W R813 10K 1/10W 1% Q810 RK7002 R811 2. 7K 1% 1/10W D809 LL4148WP R841 68K 1% 1/10W R851 R802 NC 13 KOHM +-1% 1/10W C842 0. 01uF R829 22R 1/8W R825 22R 1/8W R837 47K 1/8W C822 1uF/25V R832 10K 1/10W 1 2 3 4 5 6 7 8 IC801 IN1+ IN1FB DTC CT RT GND C1 IN2+ IN2VREF CONT VCC C2 E2 E1 16 15 14 13 12 11 10 9 R806 68K 1% 1/10W D814 LL4148WP D812 R818 1K 1/10W 1% D806 LL4148WP 0 OHM +-5% 1/4W C821 0. 1uF/25V TL494 R810 51K 1/8W R861 270K 1% 1/10W Q807 PMBS3904 R854 68K 1% 1/10W R807 47K 1/10W R826 1K 1/10W 1% R824 1K 1/10W 1% R803 1M 1/10W 5% C825 0. 1uF/25V C845 2. 2uF/16V R862 1M 1/10W 5% C846 NC Q809 RK7002 R820 47K 1/10W NC R863 R831 2. 4K 1% 1/10W C820 220pF R805 NC C817 NC C834 0. 1uF/25V R835 1M 1/10W 5% T P V ( Top Key Component Victory Electronics Co . ) OEM MODEL 20'&22 LCD TPV MODEL PCB NAME Sheet PWPC8C42MQF1 715G2538 1 ACE 3 of 3 Size Rev Custom 4 <> G2538-4-X-X-35-080716 03. INVERTER Thursday , July 17, 2008 Date 29 Service Manual 5. 3 Audio Board 715G2837-1-2 CN602 1 2 3 4 5 6 7 8 9 10 11 12 GND VCC VOL MUTE NC RR+ LL+ GND ASUS VW224U&VW224S CN602 12 CN603 NC NC CN605 1 CN604 R602 1 2 3 NC 10K OHM R601 10K OHM C603 0. 47UF25V GND CONN C602 0. 47UF25V NC U601 EUA6021AIIT1 3 9 6 GND + C604 100uF/16V GND PVDD CN601 1 2 3 5 4 R604 10K OHM C601 0. 47UF25V C605 0. 47UF25V 8 7 4 5 PVDD VDD LIN+ LINRIN+ RIN- LOUT+ LOUTROUT+ ROUTBY PASS 12 10 20 2 16 15 19 13 GND GND GND + C608 1uF50V PHONEJACK R605 10K OHM C606 0. 47UF25V C607 0. 47UF25V GND R611 10K OHM 14 SHUTDOWN# FADE# SE/BTL# C610 0. 001uF PGND PGND 0. 001uF + C609 1uF50V GND 11 17 AGND 56G 616 40 R606 20K OHM C611 R607 20K OHM R603 10K OHM 18 VOLUME NC GND GND GND GND FB601 1 2 BEAD GNDGNDGND 1W 8OHM SPK 2W 4OHM SPK R604 065G 60227352T 065G 60291252T R605 R606 065G 60262252T 065G 60210352T GND 1 T P V ( Top Key Component Victory Electronics Co . ) OEM MODEL ASUS VW224 TPV MODEL PCB NAME Sheet AUPC8QU3 715G2837-1-2 2 of 2 Size Rev A4 1 <> G2837-1-2-X-2-080707 01 AUDIO Monday , July 07, 2008 Date 30 Service Manual 5. 4 Key Board 715G2900-1 ASUS VW224U&VW224S CONN 6 5 4 3 2 1 KEY 1 KEY 2 POWER-KEY LED-BLUE LED-AMBER CN001 GND 2 ZD001 C001 0. 1uF RLZ5. 6B 1 2 2 ZD002 C002 0. 1uF RLZ5. 6B 1 ZD003 C003 RLZ5. 6B 1 0. 1uF C004 0. 1uF C005 0. 1uF GND GND GND GND GND R001 2K OHM 1% 1/10W R002 0R05 1/10W 5% R003 1K 1/10W 1% R004 2K OHM 1% 1/10W R005 0R05 1/10W 5% 2 4 LED01 LED GND Size Rev 3 A E 1 SW001 2 1 SW002 2 1 SW003 2 1 SW004 2 1 SW005 2 1 SW006 2 3 SW 4 3 SW 4 3 SW 4 3 SW 4 3 SW 4 3 SW 4 Splendid-All Auto-VK222H Left Menu GND Right Input-VK222H Auto-other Power T P V ( Top Key Component Victory Electronics Co . ) OEM MODEL ASUS VW224 TPV MODEL KEPC7QU1 PCB NAME Sheet G2900-E 2 of 2 G2900-E-x-x-1-080102 01. KEY BOARD Thursday , January 03, 2008 Date 31 1 Service Manual ASUS VW224U&VW224S 6. PCB Layout 6. 1 Main Board 715G2670-1-2 32 Service Manual ASUS VW224U&VW224S 33 Service Manual ASUS VW224U&VW224S 34 Service Manual 6. 2 Power Board 715G2538-1-ACE ASUS VW224U&VW224S 35 Service Manual ASUS VW224U&VW224S 36 Service Manual ASUS VW224U&VW224S 37 Service Manual 6. 3 Audio Board 715G2837-1-2 ASUS VW224U&VW224S 6. 4 Key Board 715G2900-1 38 Service Manual ASUS VW224U&VW224S 7. Disassemble & Assemble SOP 7. 1 Precaution Please read the precautions as follows to prevent any damages to the LCD Monitor and also select the appropriate tools for disassembly and re-assembly. Make sure all power connection is removed. Be sure that the LCD Monitor is in power off status. Prepare soft cloth and sponge as working platform to place LCD monitor horizontally. Hold LCD by the side carefully and DON'T touch or press panel directly. Remove all rings, watches and any other metal objects from your hands which possible to cause scratch. Always wear a ground strap or anti-static glove to protect the parts from static discharge. ESD (electro-static discharge) protection is required to guarantee the safety of product and personnel. 39 Service Manual 7. 2 Suggest Tools Here are some tools that can be used for the LCD monitor's service and repair. Philips-head Screwdirver Use a Philips-head screwdriver to fasten/remove the K- or B-typed screws ASUS VW224U&VW224S P/NN/A Gloves To protect LCD Panel and your hand P/N: (L) N/A (M) N/A C/D Disassembly Tool Use C/D Disassembly Tool to open cosmetic cover and avoid scratch. P/N: N/A Spacer Screwdriver Use a spacer screwdriver to fasten/remove spacer screws or hex screws. P/N: N/A 40 Service Manual 7. 3 Disassembly Procedure replace the defective parts accordingly. ASUS VW224U&VW224S Information in this section is to perform the disassembly procedure of the LCD monitor. Depending on the failures, ASUS VW224U LCD monitor consists of various subsystems. This section describes the procedures for LCD monitor disassembly. In addition, the detailed disassembly procedures of individual subsystem will be provided for your service needs. The disassembly procedure consists of the following steps: 3. 1 Stand Subsystem 3. 2 Main Subsystem 3. 3 Bezel Subsystem 7. 3. 1 Stand Subsystem 1. Unlock the latches under BASE to dismount. 2. Use C/D disassembly tool to unlock STAND COVER. 41 Service Manual 3. [. . . ] Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100 7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2 D. Switch the chroma-7120 to RGB-Mode (with press "MODE" button) 2. Switch the MEM. channel to Channel 10 (with up or down arrow on chroma 7120) 3. [. . . ]