Assessments - 1, GPA: 4
(
)
)
|
Facilidade de uso
MODEL COMMANDER DEST. CHASSIS NO. –––––– –––––––––––– ––––– ––––––––––– –––––– –––––––––––– ––––– ––––––––––– FDL-PT222 US MICROFILM LCD COLOR TV . Please file according to model size. ....... FDL-PT222 SPECIFICATIONS TABLE OF CONTENTS Section Title Page 1. GENERAL Power Sources (see fig. A) ...................................................... 3 Operation (see fig. B) .............................................................. 3 External Antenna Connection (see fig. C) ............................... 4 WARNING .............................................................................. 4 2. DISASSEMBLY 2-1. Cabinets ........................................................................ 5 2-2. Service Position ............................................................ 6 3. CIRCUIT ADJUSTMENTS ............................................ 7 4. DIAGRAMS 4-1. Block Diagram (1) ............................................................ 9 4-2. Block Diagram (2) .......................................................... 11 4-3. Circuit Boards Location ................................................. 14 4-4. Printed Wiring Boards and Schematic Diagrams ........... 14 • T1 Board ..................................................................... 15 • A Board ....................................................................... 19 • B Board ....................................................................... 23 4-5. Semiconductors .............................................................. 27 5. EXPLODED VIEWS 5-1. Chassis Section .............................................................. 28 6. ELECTRICAL PARTS LIST ........................................ 29 (CAUTION) SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE AN ODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON PAINT ED ON THE CRT, AFTER REMOVING THE ANODE. WARNING!! AN ISOLATION TRANSFORMER SHOULD BE USED DURING ANY SER VICE TO AVOID POSSIBLE SHOCK HAZARD, BECAUSE OF LIVE CHAS SIS. THE CHASSIS OF THIS RECElVER IS DIRECTLY CONNECTED TO THE AC POWER LINE. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESECOMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE CRITICAL TO SAFEOPERATION ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IMPROPER OPERA TION IS SUSPECTED. – 2 – SECTION 1 GENERAL The operating instructions mentioned here are partial abstracts from the Operating Instructions Manual. The page numbers of the Operating Instruction Manual remain as in the manual. (Part no : 4-083-376-11) – 3 – – 4 – FDL-PT222 SECTION 2 DISASSEMBLY 2-1. CABINETS 1. Remove the battery cover 8. 2. Push two claws with a screwdriver or equivalent on the bottom and remove them. 1 front cabinet claw 4 A board 3. While pushing the rear cabinet, remove claws of joints with the front cabinet. 4. Insert a screwdriver or equivalent to the gap on the upper side of the cabinet, and while pushing the lock spring, put it down to the rear cabinet side. 5. Remove the channel button 2. 6. Disconnect CN501 (for speaker) on the A board. 7. Remove the B board 3 and the A board 4. 8. Remove solder for the lead wire (BLK) 9. 9. Remove a screw (+PTP2X6) 6 secured the T board 5. 10. Release the T1 board 5 from two claws (right and left) on the rear cabinet. front cabinet rear cabinet 2channel button 7rear cabinet claw 3B board 5T1 board 6screw (+PTP2X6) 9lead wire (BLK) lock spring 8 battery cover – 5 – FDL-PT222 2-2. SERVICE POSITION CN301 Mini-jack J101 CN201 T1 board B board Cable for service 1-900-211-84 CN601 A board CN602 Cable for service 1-900-211-84 AC power adaptor Antenna – 6 – FDL-PT222 SECTION 3 CIRCUIT ADJUSTMENTS 3-1.A BOARD ADJUSTMENT [+4.5V ALIGNMENT (RV601)] Using a digital voltmeter measuring the voltage between JL32 (+4.5V) and JL33 (GND). Adjust RV601 to obtain the value shown below. Standard Value = 4.45V± 0.05VDC S601 position = UHF position [+30.0V CHECK] Check the voltage across JL29 (+30.0V) and JL33 (GND) . Standard Value = 30.5V±1.5VDC [AUDIO OUTPUT CHECK] 1. Feed the audio signal 1kHz 100% modulated. 2. Set RV501 to maximum. 3. Connect an oscilloscope between JL23 (SP) and JL15 (SP GND). 4. Check the waveform on the oscilloscope becomes the standard value. Standard Value = 1.5V-2.8Vp-p 3-2.T1 BOARD ADJUSTMENT -T1 board - (Component side) TU101 RV201 T201 T202 RV002 RV004 RV001 [VIF.AFT COARSE ADJUSTMNT (T201, T202)] [SETUP] 1. Set S601 on the A board to VHF position. 2. Apply no signal to JL18 (RF). 3. Connect a 1 k. resistor between JL77 (+4.5V) and JL28 (RF AGC). 4. Apply a sweep signal across JL26 (IF) and JL27(IF GND). (Fig. 3-1) Note : Set the sweep signal for JL26 to -30±5dBm. Keep the distance to the ATT output JL26 as short as possible. SWEEP MARKER GENERATOR...