HMD-A400 SERVICE MANUAL US Model Canadian Model Chassis No. SCC-L35A-A CHASSIS SPECIFICATIONS 0.24 mm aperture grille pitch (center) 19 inches measured diagonally 90-degree deflection FD Trinitron Approx. 365 × 274 mm (w/h) Viewable image size × 10 inches) 18.0" viewing image...
Page 2
VIEWS AND IN THE PARTS LIST ARE CRITICAL FOR Parts on Set SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS AP- PEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE- MENTS PUBLISHED BY SONY. CIRCUIT ADJUST- MENTS THAT ARE CRITICAL FOR SAFE OPERATION 0.15 µF...
HMD-A400 POWER SAVING FUNCTION This monitor meets the power-saving guidelines set by VESA, NERGY TAR, and NUTEK. If no signal is received by the monitor from the connected computer, the monitor will automatically reduce power consumption as shown below. Power mode Power...
HMD-A400 TABLE OF CONTENTS Section Title Page 1. GENERAL ..............1-1 2. DISASSEMBLY 2-1. Bucket Assembly Removal ......... 2-1 2-2. A Board Removal ..........2-1 2-3. D Board Removal ..........2-2 2-4. Service Position ............ 2-3 2-5. H Board Removal ..........2-4 2-6.
HMD-A400 2-4. SERVICE POSITION A board D board • REMOVAL OF 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.
HMD-A400 2-5. H BOARD REMOVAL Three screws (+BVTP 3 X 12) Menu knob H board Cushion 2-6. PICTURE TUBE REMOVAL A board Bottom assembly Screw (+BVTP 4 X 16) Four tapping screws (5) Screw (+BVTP 4 X 16) Deflection yoke...
HMD-A400 SECTION 3 SAFETY RELATED ADJUSTMENT When replacing parts shown in the table below, the After adjusting the High Voltage within specification, put the RV cover on RV501 as shown below and apply following operational checks must be performed as a safety precaution against X-ray emissions from the unit.
HMD-A400 SECTION 4 ADJUSTMENTS Connect the communication cable of the computer to the connector located on the monitor. Run the service software and then follow the instruction. C Interface Card C Interface Cable HD15 Connector Adapter Computer Video Cable as a Jig •...
Page 19
HMD-A400 • Convergence Specification • Convergence Rough Adjustment 1. Enter the crosshatch signal. 2. Recheck focus and readjust when focus was worse. 3. Adjust roughly H. STAT and V. STAT convergence by 4 MODE All mode pole magnet. 0.30 mm 4.
SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAMS SIGNAL-IN HD15 PIG-TAIL (VIDEO, RGB OUT) IC001 PRE AMP,OSD MIX IC002 RGB OUT CN301 R.G.B R IN R OUT R VIN2 R VOUT2 GREEN G IN G OUT BLUE B IN G VIN3 G VOUT3 H-IN V-IN B OUT...
Page 22
CN2903 USB DB_A BLOCK USB BLOCK IC7000 USB CONT IC7001 P8D1 P7D1 µ-COM, DEFLECTION CONTROL, PSW1 OUTA DEFLECTION, HV, POWER SUPPLY, FLGA OC1_N H.DF, V.DF, USB CONTROL OC2_N FLGB CN2903 OUTB PSW2 23 INDV/SCL 22 OPTION/SDA CN904 P7000 USB DM USB DM 28 DM0 USB DB_B BLOCK...
5-2. FRAME SCHEMATIC DIAGRAM 5-3. CIRCUIT BOARDS LOCATION CN301 H-IN V-IN RGND VIDEO CABLE GGND VIDEO, GREEN BGND RGB OUT BLUE CN301 PICTURE DDC SCL TUBE VIDEO CABLE DDC SDA PCDET G1 G2 P701 CN903 MENU MENU ORG LED ORANGE/LED GRN LED GREEN/LED USER...
5-4. SCHEMATIC DIAGRAMS AND PRINTED (1) Schematic Diagram of H Board • Divided circuit diagram WIRING BOARDS One sheet of D board circuit diagram is divided into six Note: sheets, each having the code D-a to D-f. For example, the •...
µ-COM, DEFLECTION CONTROL, DEFLECTION, HV, POWER SUPPLY, H DF, V DF, USB CONTROL — D BOARD — 5-13 5-14...
Page 28
a , b b , c c , d d , e e , f f ) Board (3) Schematic Diagrams of D (a ( µ-COM, DEFLECTION CONTROL) R900 +15V 2.7k IC901 ST72754 TH602 R402 C406 C900 2.1k 3300p D402 R403 1N4002 PC0/...
HMD-A400 SECTION 6 EXPLODED VIEWS NOTE: • Items with no part number and no • Items marked " * " are not stocked since ¡ The components identified by mark description are not stocked because they they are seldom required for routine are critical for safety.
Ne les remplacer que par une pièce portant le numéro spécifié. CAPACITOR • MF : µF When indicating parts by reference number, please include the board name. COIL • UH : µH • All variable and adjustable resistors have characteristic curve B, unless otherwise noted. HMD-A400(E) 7-1...
Page 68
CARBON 15K 1/4W 4050515355 Sony RESISTOR R705 1-244-180-11 1-244-180-11 METAL 6.19K 4257046191 Others RESISTOR R706 1-244-178-11 1-244-178-11 METAL 3.83K 4257043831 Others RESISTOR R709 1-244-253-11 1-244-253-11 METAL 10.2K 1/4W 4257041022 SWITCH SW701 1-771-734-11 1-771-734-11 SWITCH, TACTILE (MENU) 4410606000 Sony HMD-A400(E) 7-30...
Page 69
HMD-A400 Sony Corporation English Computer Display Division Company 2001BL05-Data Computer Display Div. 9-978-693-01 Made in Japan 2001.2 – 83 –...