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P75
P75
SERVICE MANUAL
US Model
Canadian Model
UK Model
AEP Model
N. Hemisphere Model
S. Hemisphere Model
Australian Model
Chassis No. SCC-L07E-A
D-1HCHASSIS
SPECIFICATIONS
Picture tube
0.25 mm aperture grill pitch Power Consumption
17 inches measured diagonally Maximum
115W
90-degree deflection Nominal
100W, 341 BTU/h
Video image area
(16" maximum viewing image) Deflection frequency
Horizontal: 30 to 85 KHz
Approx. 329.5 x 243 mm (w/h)
Vertical: 50 to150 Hz
5/8
(13 x 9 inches)
AC input voltag
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P75 ‘‘‘‘‘ ‘‘‘‘‘ ‘‘‘‘‘ ‘‘‘‘‘ — 2 — POWER SAVING FUNCTION If no video signal is input to the monitor, the "NO INPUT SIGNAL" message appears. NOTE: After about 30 seconds, the Power Saving function automatically puts the monitor into This monitor has three Power Saving modes. active-off mode and the indicator lights up orange. Once the monitor detects horizon- By sensing the absence of a video signal from the tal and vertical sync signals, the monitor automatically resumes normal operation mode. c
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P75 SAFETY CHECK-OUT (US Model only) After correcting the original service problem, perform LEAKAGE TEST the following safety checks before releasing the set to the The AC leakage from any exposed metal part to earth ground customer: and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampere). 1. Check the area of your repair for unsoldered or Leakage current can be measured by any one of three methods. poorly-
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P75 TABLE OF CONTENTS Section Title Page 1. GENERAL ................................................................................... 5 2. DISASSEMBLY 2-1. Cabinet Removal ............................................................8 2-2. Service Position .............................................................. 8 2-3. A, D, H, S Board Removal............................................. 8 2-4. Pict
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P75 - • ¶ * . * — 5 — SECTION 1 GENERAL The instructions given here are partial abstracts from the Operating Instruction Manual. The page numbers shown reflect those of the Operating Instruction Manual. USB Connectors Operating the The base of the monitor has two Universal Serial Bus (USB) Monitor connectors. Use USB connector to connect the USB signal cable to the computer. Use USB Connector to connect USB compatible plug and play devices such as a keyboard, mouse, or joystick if supported
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P75 ‚ — 6 — On-Screen Display Settings The adjustments for screen settings are located in the on-screen display and can be viewed in one of five available languages. The on-screen Main Menu displays the following ten functions: Size and Position Adjusts width, height, and horizontal and vertical positions of the screen. Geometry Adjusts pincushion, pincushion balance, trapezoid, parallelogram, and tilt. Overscan Zooms in and enlarges a selected portion of the screen. Color Displays the followin
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P75 . — 7 — Display Resolutions Connector Pin Assignments The display resolutions listed below are the most commonly used modes and are set as factory defaults. The monitor Signal Cable automatically recognizes these preset modes when they are Connector Pin Signal requested by a software program and will provide the user with 1 Red Video a properly sized and centered display. 5 4 3 2 1 2 Green Video 10 KEY 8 7 6 15 14 13 12 11 3 Blue Video Display Resolutions 4 Open 5 Return Preset Modes
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P75 SECTION 2 DISASSEMBLY 2-1. CABINET REMOVAL 2-2. SERVICE POSITION 2 Two claws PUSH Cabinet 3 PUSH A board 1 3 D board 2 1 Two screws (BVTP 4 x 16) 2-3. A, D, H, S BOARD REMOVAL H board 2 A board 3 Cable stopper 4 5 Cable bracket Five screws 7 (BVTP 3 x 12) 6 One screw (BVTT 4 x 8) S board 1 8 D board — 8 —
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P75 Demagnetization coil 8 2-4. PICTURE TUBE REMOVAL 9 Two screws 7 (BVTP 4 x 16) Tension spring 6 A board Neck assy 5 Deflection yoke 4 Four screws 3 (Tapping screw 5) 10 Stand assy (D board) Picture tube shield 2 1 Anode cap Cushion REMOVAL OF THE ANODE-CAP NOTE: Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon painted on the CRT, after removing the anode. REMOVAL PROCEDUR
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P75 SECTION 3 SAFETY RELATED ADJUSTMENT When replacing parts shown in the table below, the b) HV Hold-Down Check following operational checks must be performed as a 1) Using an external DC Power supply, apply the safety precaution against X-ray emissions from the unit. voltage shown below between cathode of D517 on "D" Board and GND, and confirm that the HV Hold-Down circuit works. (Raster disappears) D - BOARD Apply DC Voltage: 31.4 + 0.01 VDC Part Replaced ([)
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P75 SECTION 4 ADJUSTMENTS Connect the communication cable of the connector located on the D board on the monitor. Run the service software and then follow the instructions. 1 1-690-391-21 2 A-1500-819-A 3 3-702-691-01 Interface Unit Connector Attachment IBM AT Computer To BUS CONNECTOR as a Jig D-sub mini Din 4 Pin 4 Pin 4 Pin (9 Pin [female]) (8Pin) *The parts above ( ~ ) are necessary for DAS adjustment. 1 3 Allow a 30 minute warm-up period prior to making the following adjustments:
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P75 3. Receive White cross-hatch. Convergence Specification 4. Adjust HMC and VMC at six-pole magnet. < 6 Pole Magnet> Horizontal and Vertical 2 0.30mm A 0.24mm B G 1 B 0.30mm 0.30mm A 2 G 1 Focus adjustment 5. Receive R.B. cross-hatch. Adjust focus (V) and focus (H) for optimum focus. 6. Adjust H.TILT by swinging the DY neck right and left. 7. Adjust XCV with XCV core. XCV movement B R Focus (V) 8. Adjust V.T
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P75 5-2. CIRCUIT BOARDS LOCATION A H S D1 U1 D U2 5-3. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS Note: • All capacitors are in μF unless otherwise noted. pF: μμF • When replacing parts shown in the table below, 50 WV or less are not indicated except for electrolytic. be sure to perform the safety related adjustment. • Indication of resistance, which does not have one for rating electrical power, is as follows. D - BOARD Pitch: 5 mm Part Replaced ([
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} CN305 8P +5V 8 STBY +5V CN307 IC006 9P 7 GND 25 8 5 WHT SHARPNESS R-OUT R-IN R-OUT +12V 6 +12V BGND 1 5 H1 CRT DRIVER 21 6 22 9 3 BLUE 2 5 BIN R-OUT R-IN G-OUT G-IN 4 GND IC002 G-OUT J001 5 GGND 3 +80V 3 +80V SIGNAL IN 3 19 8 18 11 1 GREEN 4 GIN G-OUT G-IN B-OUT B-IN B-OUT 4 2 NC H RGND 5 +185V 1 +185V 1 17 10 7 RED 6 RIN B-OUT B-IN KR 8 1 11 GND 7 KG CONNECTOR 14 SYN-OUT 11 9 15PIN D-SUB VD 8 CLAMP KB 13 IC001 6 HD 9 CLAMP RGB PRE-AMP 12 16 BUFFER T-SW & LEVEL BLK G2 Q005 10 CN309 CN301 15 12
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DDCSCL 1 DDCSDA 2 HOSTGND 3 11 10 9 8 7 6 5 4 3 2 1 12 13 14 15 16 17 18 19 20 21 22 STBY+5V 14 13 12 11 10 9 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 9 10 11 12 13 14 15 16 15 16 17 18 19 20 21 22 23 24 25 26 27 28 B_IN VBIAS G_IN R_IN R_IN G_IN GND3 B_IN VCC GND R_OUT VIP GND2 VCC G_OUT B_OUT GND1 G_OUT B_OUT R_O UT 8 7 6 5 1 2 3 4 +12V FB005 +185V FB001 +80V FB004 11 12 G3 J001 10 IC002 1 LM2405T 8 RCV 1 IC001 9 (VIDEO) 13 CXA2055P RGB OUTPUT 7 G1 3 PRE-AMP 9G2 H2 11 4 CN307 SDA G2 9P 11 10 9 8 7 6 5
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DEGAUSS L 4 3 2 N 1 9 10 11 12 13 14 15 16 8 7 6 5 4 3 2 1 +5V 9 2 3 GND 8 1 +12V 7 6 H1 GND 5 NC 4 +80V 3 NC 2 +185V 1 1 H DY+ H DY+ 2 HEATER H DY- 3 H DY- 4 V DY- 5 V DY+ 6 V.DF 1.2KV 1 9 8 7 6 5 4 3 2 1 10 11 12 13 14 15 16 17 18 5 1 1 2 3 4 5 6 7 4 3 2 REMOTE ON/OFF S4 V SAW V SAW E/W V.DF H BLK 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 S3 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 D401 EGP10G S2 V-REF V-REF H FLY H BLK S1 ABL THERMAL THERMAL H BLK H-USYNC V-USYNC KEY SCAN S0 H CENT SW S4 THERMA
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1 VR9101 10K CN9101 FB9101 5MM 2 1 5V TO D-BOARD FB9102 5MM 1 VR9102 2 CONT 10K FB9103 5MM CN9901 & CN990 3 3 BRIGHT GND 4 2 (CONT/BRITE CNTL) B-#SV9055-H..
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(PWR SWITCH AND LED) CN9201 3P 3 RED TO D-BOARD 2 GREEN D9201 CN904 1 GND D9202 1 AC LIVE IN CN6601 TO D-BOARD 1P CN603 S901 1 AC LIVE OUT CN6602 1P B-#SV9055-S..
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CN1301 CN1302 5V 1 1 5V TO USB PNP 2 DMO 2 DMO TO U2-BOARD DEVICES DPO 3 3 DPO CN1303 4 GND 4 DP GND 5 GND (USB1) B-#SV9055-U1..
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CN1303 CN1304 5V 1 5V 1 DM1 2 DM1 2 TO U1-BOARD TO COMPUTER CN1302 DPO 3 DP1 USB PORT 3 DP GND 4 GND 4 GND 5 (USB2) B-#SV9055-U2..
