SDM-S91
Contents
1. 1 1 1 2 Keyboard Mount Removal 1 2 1 3 Inverter Mount Removal 1 3 1 4 I F Board Remov 4l 1 4 1 5 Panel Removal 1 5 2 DIAGRAMS 2 1 Circuit Boards Location 2 3 EXPLODED VIEWS IO 3 2 3 2 Packing Materials 3 3 Title SDM S91 E 6 SECTION 1 DISASSEMBLY 1 1 CABINET FULL ASSY AND TFT PANEL REMOVAL 1 Four screws PTP 4x12 2 Cabinet full assy Stand assy 3 Two screws PTP 4x12 SDM S91 E 1 1 1 2 KEYBOARD MOUNT REMOVAL Three screws PTP 3x8 _ Spacer x liS 2 Keyboard mount Sai Ses gt Bezel full assy IN 0 d SDM S91 E 1 2 1 3 INVERTER MOUNT REMOVAL Two screws SCH P 3x4 3 Two screws PWH 3x6 SDM S91 E 1 3 1 4 BOARD MOUNT REMOVAL 1 Three screws P 3x4 1 Three screws i 3 4 I F cover Six screws PWH 3x6 6 CN008 lt 9 9 I F board mount screws Screw P 3x4 A Stopper plate SDM S91 E 1 4 1 5 TFT PANEL REMOVAL Two screws PWH 3 lt 6 2 Cabinet assy 1 Two screws PWH 3 6 TFT Panel SDM S91 E 1 5 SECTION 2 DIAGRAM 2 1 CIR2. Color Computer DISPLAY SONY SAFETY CHECK OUT After correcting the original service problem perform the following safety checks before releasing the set to the customer I Check the area of your repatr for unsoldered or poorly soldered connections Check the entire board surface for solder splashes and bridges Check the interboard wiring to ensure that no wires are pinched or contact high wattage resistors Check that all control knobs shields covers ground straps and mounting hardware have been replaced Be absolutely certain that you have replaced all the insulators Look for unauthorized replacement parts particularly transistors that were installed during a previous repair Point them out to the customer and recommend their replacement Look for parts which though functioning show obvious signs of deterioration Point them out to the customer and recommend their replacement Check the line cords for cracks and abrasion Recommend the replacement of any such line cord to the customer Check the B and HV to see if they are specified values Make sure your instruments are accurate be suspicious of your HV meter 11 sets always have low HV Check the antenna terminals metal trim metallized knobs screws and all other exposed metal parts for AC Leakage Check leakage as described right LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from
3. CUIT BOARDS LOCATION SDM S91 E 2 1 SECTION 3 EXPLODED VIEWS e Items with no part number and description are not stocked because they are seldom required for routine service e The construction parts of an assembled part are indicated with a collation number the remark column Items marked are not stocked since they are seldom required for routine service Some delay should be anticipated when ordering these items The components identified marked are critical for safety Replace only with the part number specified Les composants identifi s par la marque N sont critiques pour la s curit Ne les remplacer que par une pi ce portant le numero sp cifi SDM S91 E 3 1 3 1 CHASSIS REF NO PARTNO DESCRIPTION REMARK 1 X 4041 076 1 ASSY BEZEL FULL U C X 4041 309 1 ASSY BEZEL FULL AEP 1 805 139 11 LCD PANEL LTM190E1 L04 1 761 654 11 I F BOARD MOUNT 1 761 652 11 KEYBOARD MOUNT 1 761 653 11 INVERTER MOUNT PWH 3x6 P3x4 6 4041 089 1 STAND ASSY U C 4041 308 1 STAND ASSY 7 4 092 085 01 COVER REAR U C 4 093 516 01 COVER REAR AEP 8 X 4041 119 1 ASSY CABINET FULL U C X 4041 306 1 ASSY CABINET FULL AEP 9 4 092 089 01 LABEL INFORMATION U C 4 092 089 11 LABEL INFORMATION AEP 2 Ba 8 SDM S91 E 2 3 2 PACKING MATERIALS 51 4 092 108 01 INDIVIDUAL CARTON
4. ON When the monitor 5 an Input signal it automatically matches the signal to one of the factory preset modes stored in the monitor s memory to provide a high quality picture at the center of the screen See Appendix for a list of the factory preset modes For input signals that do not match one of the factory preset modes the automatic picture quality adjustment function of this monitor automatically adjusts the picture position phase and pitch and ensures that a clear picture appears on the screen for any timing within the monitor s frequency range horizontal 28 92 kHz vertical 48 85 Hz Consequently the first time the monitor receives input signals that do not match one of the factory preset modes the monitor may take a longer time than normal for displaying the picture on the screen This adjustment data is automatically stored in memory so that next time the monitor will function in the same way as when the monitor recetves the signals that match one of the factory preset modes In all modes as above 11 the picture is adjusted the adjustment data 15 stored as a user mode and automatically recalled whenever the same Input signal 15 received Note While the automatic picture quality adjustment function is activated only the power switch will operate SDM S91 E 5 TABLE OF CONTENTS Section Title Page Section 1 DISASSEMBLY 1 1 Back Cabinet and Panel Removal
5. SERVICE MANUAL LCD panel Input signal format Resolution Input signal levels Power requirements DC input Power consumption Operating temperature SPECIFICATIONS Panel type 51 Active Matrix Picture size 19 0 inch RGB operating frequency Hortzontal 28 92 kHz Vertical 48 85 Hz Horizontal 1280 dots Vertical Max 1024 lines RGB video signal 0 7 Vp p 75 Q positive SYNC signal TTL level 2 2 positive or negative Separate horizontal and vertical or composite sync 0 3 Vp p 75Q negative Sync on green 100 240 V 50 60 Hz Max 1 5 DC 12 V supplied AC adapter Max 50 W 5 35 SDM S91 US Model Canadian Model AEP Model Dimensions width height depth Mass Plug amp Play Display upright Approx 458 x 421 x 235 mm 18 x 16 1 2 x 9 1 4 inches with stand 458 x 370 x 64 mm 18 x 14 1 2 x 2 1 2 inches without stand 7 3 16 lb 2 oz with stand Approx 5 6 12 Ib 6 oz without stand DDC2B Recommended horizontal and vertical timing condition Horizontal sync width duty should be more than 4 8 of total horizontal time or 0 8 us whichever is larger Horizontal blanking width should be more than 2 5 usec Vertical blanking width should be more than 450 usec Design and specifications are subJect to change without notice TFT LCD
6. SUSPECTED ATTENTION AUX COMPOSANTS RELATIFS LA S CURIT LES COMPOSANTS IDENTIFI S PAR UNE TRAME ET UNE MARQUE SONT CRITIQUES POUR LA S CURIT NE LES REMPLACER QUE PAR UNE PIECE PORTANT LE NUMERO SPECIFIE LES REGLAGES DE CIRCUIT DONT L IMPORTANCE EST CRITIQUE POUR LA SECURITE DU FONCTIONNEMENT SONT IDENTIFIES DANS LE PRESENT MANUEL SUIVRE CES PROCEDURES LORS DE CHAQUE REMPLACEMENT DE CRITIQUES OU LORSQU UN MAUVAIS FONCTIONNEMENT EST SUSPECTE SDM S91 E 3 POWER SAVING FUNCTION This monttor meets the power saving guidelines set by VESA ENERGY STAR and NUTEK If the monitor 15 connected to computer video graphics board that is DPMS Display Power Management Signaling compliant monitor will automatically reduce power consumption as shown below Power mode Power consumption power indicator normal 50 W max green operation active off 3 W max orange deep sleep power off 3 W off When your computer enters the active off mode the input signal 1s cut and NO INPUT SIGNAL appears on the screen After 20 seconds the monitor enters the power saving mode deep sleep 15 the power saving mode defined by the Environmental Protection Agency Tf only the horizontal or vertical sync signal is input to the monitor the power indicator may alternately flash green and orange SDM S91 E 4 AUTOMATIC PICTURE QUALITY ADJUSTMENT FUNCTI
7. U C 4 092 719 01 INDIVIDUAL CARTON AEP 52 gt 4 092 106 01 CUSHION UPPER 53 4 092 107 01 CUSHION LOWER 54 1 477 232 13 ADAPTOR AC U C 1 477 232 14 ADAPTOR AC AEP 55 1 765 718 11 CORD SET POWER U C 56 1 824 308 11 CABLE SIGNAL HD15 HD15 57 4 092 714 01 DISC INFORMATION CD ROM U C 58 4 087 260 32 MANUAL INSTRUCTION SDM S91 E 3 3 English Sony EMCS Corporation 2002LL08 Data i Made Japan 9 978 758 01 Ichinomiya Tec 2002 12 SDM S91 E 16
8. all exposed metal parts to any exposed metal part having a return to chassis must not exceed 0 5 mA 500 microamperes Leakage current can be measured by any one of three methods I A commercial leakage tester such as the Simpson 229 RCA WT 540A Follow the manufacturers instructions to use these instruments 2 A battery operated AC milliammeter The Data Precision 245 digital 3 multimeter is suitable for this job Measuring the voltage drop across a resistor by means of a VOM or battery operated AC voltmeter The limit indication is 0 75 V so analog meters must have an accurate low voltage scale The Simpson 250 and Sanwa 511 623 110 are examples of a passive VOMs that are suitable Nearly all battery operated digital multimeters that have a 2 V AC range are suitable See Fig A To Exposed Metal Parts on Set AC Voltmeter Earth Ground Fig A Using AC voltmeter to check AC leakage SDM S91 E 2 SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY SHADING AND MARK A ON THE SCHEMATIC DIAGRAMS EXPLODED VIEWS AND IN THE PARTS LIST ARE CRITICAL FOR SAFE OPERATION REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY CIRCUIT ADJUST MENTS THAT ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN THIS MANUAL FOLLOW THESE PROCEDURES WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IM PROPER OPERATION IS
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