Panasonic PTL785U - LCD PROJECTOR UNIT Service Manual Download

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8 Disassembly Instructions

Warning:

Be sure to unplug the power cord from the power outlet before disassembling this projector.

Caution:

While turning over a printed circuit board, be sure to put a insulating material under it to prevent a short circuit.

Printed circuit boards and wires must not be pulled forcibly, but be handled carefully.

Connectors also must be handled carefully.

After repairing this projector, be sure to put back the wires and connectors to the original condition.

8.1. Printed Circuit Board and Main Parts Location

Electrical Parts

Optical Parts

PT-L785U / PT-L785E

Summary of Contents for PTL785U - LCD PROJECTOR UNIT

Page 2: ...2 PT L785U PT L785E...

Page 3: ...1 Safety Precautions 5 1 1 General Guidelines 5 CONTENTS Page Page 3 PT L785U PT L785E...

Page 4: ...16 8 7 Removal of Ballast Unit B Q Module 17 8 8 Removal of K Module 17 8 9 Removal of Analysis Block 18 8 10 Removal of LCD Block 19 8 11 Replacement of LCD Panel 19 8 12 LCD Panel Discrimination 20...

Page 5: ...in Table 1 Fig 1 Table 1 Fig 2 2 Assemble the circuit as shown in Fig 2 Plug the power cord in a power outlet 3 Connect M1 to T1 according to Fig 2 and measure the voltage 4 Change the connection of M...

Page 6: ...ible setting FAN FULL MODE is given priority more than FANCONTROL Caution Switching ON FAN FULL MODE while used usually at an elevation of lower than 1 400 m this may cause malfunctions SELF CHECK To...

Page 7: ...ode Press MENU button on the main unit or remote control unit 4 Service Mode This mode is used to display five kinds of test patterns Horizontal lines Vertical lines Dots Crosshatch and White No patte...

Page 8: ...unit Note DESK setting blue is displayed when entering the adjustment mode 5 2 Adjustment Display and Contents Setting value is increased and decreased with the right arrow and left arrow buttons Dec...

Page 9: ...r 6 3 Communication Settings Signal Level Contents Description Sync method Asynchronous Synchronizes every 1 character 8 bits Baud rate Conforms to 9 600 bps Data transfer speed Parity RS 232C None Er...

Page 10: ...Control Commands the next command When a command which does not require parameters is sent the colon is not required 6 5 Control Query Commands 10 PT L785U PT L785E...

Page 11: ...Query Commands 11 PT L785U PT L785E...

Page 12: ...When controls the audio volume to 30 by a PC Sends commands as the following When a command which does not require parameters is sent the colon is not required 6 6 Communication Cable Specifications 1...

Page 13: ...unded connect to pin 1 7 2 Pin Layout and Signal Names for REMOTE Connector The connector used is the same as SEREIAL connector Note Refer to section 6 2 Pin Layout and Signal Names for SERIAL Connect...

Page 14: ...a insulating material under it to prevent a short circuit Printed circuit boards and wires must not be pulled forcibly but be handled carefully Connectors also must be handled carefully After repairi...

Page 15: ...according to the section 8 2 Removal of Upper Case 2 Unscrew the 4 screws and remove the S P C Board 8 4 Removal of R P C Board 1 Remove the upper case according to the section 8 2 Removal of Upper C...

Page 16: ...ard 10 Unscrew the 2 screws and remove the terminal cover 11 Unscrew the 2 hex head screws and 2 ornament screws 12 Unscrew the 2 screws and remove the J P C Board 8 6 Removal of P Module 1 Take the A...

Page 17: ...P Module 8 7 Removal of Ballast Unit B Q Module 1 Remove the power block then separate the power unit and the ballast unit according to the steps 1 through 8 in the section 8 6 Removal of P Module 2...

Page 18: ...l they idle and remove the lamp unit 3 Unscrew the 4 screws and remove the S P C Board 4 Unscrew the 2 screws and remove the ground fittings 5 Unscrew the 1 screw and remove the bimetal holder 6 Unscr...

Page 19: ...n counterclockwise the lens and pull it out 5 Unscrew the 4 screws and remove the LCD block 8 11 Replacement of LCD Panel 1 Remove the LCD block according to the section 8 10 Removal of LCD Block 2 Un...

Page 20: ...e LCD block again 8 Tighten the 3 screws fixing the LCD panel attachment 9 Reassemble the projector as it was 8 12 LCD Panel Discrimination ID tag seal color LCD panel Red LCD panel R Blue LCD panel B...

Page 21: ...lacement of PBS Array Analysis Block 1 Take the A P C Board block out according to the steps 1 through 6 in the section 8 5 Removal of A P C Board 2 Unscrew the 1 screw and remove the bimetal holder 3...

Page 22: ...Work with care not to touch the surface of PBS Array If not efficiency of the projector may deteriorate 8 16 Removal of lamp Unit 1 Loosen the 2 screws until they idle open the air outlet port 2 Loose...

Page 23: ...n the 3 screws fixing the LCD panel attachment and screw them temporarily just until the LCD panel can be shifted by your fingers 2 Reassemble the projector in the reverse order of disassembling but l...

Page 24: ...9 4 4 Adjustment after LCD Panel R Replacement 1 Display the white crosshatch pattern and adjust the lens focus 2 Adjust the LCD panel R to merge the green pattern with the green and blue ones 9 4 5 A...

Page 25: ...line Shifting two mirror adjusting levers in the same direction adjust color unevenness on the screen upper lower sides Shifting two mirror adjusting levers in opposite directions adjust color unevenn...

Page 26: ...oftware adjustments this projector must be turned off and on again to memorize the settings Connect the cable between the projector and a PC as shown below Updating the software will change the versio...

Page 27: ...the installation mode to the ceiling setting and receive the current data B Signal Adj Sets the test signal mode to the B signal and allows the and OK buttons of the B signal to becomes active 9 6 5...

Page 28: ...indow pattern as follows Black background screen width White window width 2 1 Black background screen height White window height 3 1 Use the window pattern of XGA 1 024 768 3 Click the OK button 9 7 3...

Page 29: ...10 Troubleshooting 29 PT L785U PT L785E...

Page 30: ...30 PT L785U PT L785E...

Page 31: ...31 PT L785U PT L785E...

Page 32: ...32 PT L785U PT L785E...

Page 33: ...33 PT L785U PT L785E...

Page 34: ...34 PT L785U PT L785E...

Page 35: ...35 PT L785U PT L785E...

Page 36: ...36 PT L785U PT L785E...

Page 37: ...37 PT L785U PT L785E...

Page 38: ...38 PT L785U PT L785E...

Page 39: ...39 PT L785U PT L785E...

Page 40: ...40 PT L785U PT L785E...

Page 41: ...41 PT L785U PT L785E...

Page 42: ...42 PT L785U PT L785E...

Page 43: ...terconnection Block Diagram 11 1 Interconnection Block Diagram 1 2 Interconnection Block Diagram 1 2 J P C Board P Module B Module B Q Module Q Module R P C Board S P C Board K Module PT L785U PT L785...

Page 44: ...11 2 Interconnection Block Diagram 2 2 Interconnection Block Diagram 2 2 A P C Board PT L785U PT L785E 44...

Page 45: ...ISOLATOR LAMP D9608 Q9608 D9609 Q9610 Q9611 Q9606 Q9607 IC9602 IC9603 D9611 Q9609 D9612 3 4 V 380 V INTERLOCK SWITCH THERMO FUSE ST2 ST1 Lamp ON OFF L det 3 4 V 6 V FAN 14 V FAN 14 V STB 3 4 V MAIN ST...

Page 46: ...GB OUT 1 2 3 R G B 12 13 14 15 SCL SDA HD1 HD3 VD1 VD3 VIDEO_V VIDEO_H HD2 VD2 VCLK SERIAL 2 3 EXHAUST2 EXHAUST1 A28 PBSFAN POWER A20 FAN6 PBS A19 FAN4 A18 FAN3 A17 FAN2 INTAKE 2 A16 FAN1 MAIN STB LAM...

Page 47: ...RRECTION LCD CONTROL IC1105 I O EXPANDER IC1062 A11 A9 A10 SDA1_5V TEST2 SCL1_5V SWITCHES FRONT SPEAKER R REAR IC1106 1H INVERTER SAMPLING HOLD IC1109 IC1110 LEVEL SHIFT IC1111 LEVEL SHIFT LEVEL SHIFT...

Page 48: ...TE 2 3 5 6 9 6 7 HD3 VD3 3 2 SW SW Q1013 IC1022 IC3022 IC3023 IC3024 Q3008 Q3007 Q3004 Q3006 Q3005 a b d HD VD AMP AMP INV INV AMP INV INV INV J1 J2 A13 A14 SCL SDA EXT EXT_PWR EXT_CH2 EXT_CH3 EXT_CH1...

Page 49: ...13 Schematic Diagram PT L785U PT L785E 49...

Page 50: ...13 1 A P C Board 1 8 A P C Board TXANP04VJX7 1 8 PT L785U PT L785E 50...

Page 51: ...13 2 A P C Board 2 8 TXANP04VJX7 2 8 A P C Board PT L785U PT L785E 51...

Page 52: ...13 3 A P C Board 3 8 A P C Board TXANP04VJX7 3 8 PT L785U PT L785E 52...

Page 53: ...13 4 A P C Board 4 8 A P C Board TXANP04VJX7 4 8 PT L785U PT L785E 53...

Page 54: ...13 5 A P C Board 5 8 TXANP04VJX7 5 8 A P C Board PT L785U PT L785E 54...

Page 55: ...13 6 A P C Board 6 8 A P C Board TXANP04VJX7 6 8 PT L785U PT L785E 55...

Page 56: ...13 7 A P C Board 7 8 TXANP04VJX7 7 8 A P C Board PT L785U PT L785E 56...

Page 57: ...13 8 A P C Board 8 8 TXANP04VJX7 8 8 A P C Board PT L785U PT L785E 57...

Page 58: ...B Module 1 2 B Module TXANPBQVJX7 1 2 Module Replacement Only supplied components IC9601 03 Q9603 11 Q9614 D9601 D9604 09 D9611 12 R9601 C9610 C9617 19 L9604 05 T9604 S9602 TXJ L2VJX7 PT L785U PT L785...

Page 59: ...B Module 2 2 B Module TXANPBQVJX7 2 2 Module Replacement Only supplied components IC9601 03 Q9603 11 Q9614 D9601 D9604 09 D9611 12 R9601 C9610 C9617 19 L9604 05 T9604 S9602 TXJ L2VJX7 PT L785U PT L78...

Page 60: ...13 11 J P C Board S P C Board J P C BOARD TNPA2624 S P C BOARD TNPA2546 PT L785U PT L785E 60...

Page 61: ...3 D 3 E 2 E 3 E 3 E 1 IC1083 IC1087 IC1088 IC1102 IC1104 IC1106 IC1107 IC1111 IC1112 IC1115 IC1117 IC1202 IC1203 IC1204 IC1205 TRANSISTOR TP Q1001 Q1004 Q1005 Q1008 Q1009 Q1010 Q1011 Q1013 Q1016 Q1018...

Page 62: ...5 C 5 D 5 D 5 D 5 D 6 B 1 E 4 IC1090 IC1091 IC1101 IC1105 IC1108 IC1109 IC1110 IC1113 IC1114 IC1116 IC1201 IC1206 IC1207 TRANSISTOR Q1002 Q1003 Q1006 Q1007 Q1012 Q1014 Q1015 Q1017 Q1032 Q1033 Q1034 Q1...

Page 63: ...Component Side TNPA2546 J P C Board Component Side TNPA2624 ADDRESS INFORMATION IC TRANSISTOR IC3022 IC3023 IC3024 J P C Board Component Side B 3 B 3 B 2 Q3004 Q3005 Q3006 Q3007 Q3008 B 3 B 3 B 4 B 4...

Page 64: ...PT L785U PT L785E 64...

Page 65: ...15 Terminal guide of ICs and transistors PT L785U PT L785E 65...

Page 66: ...16 Exploded Views PT L785U PT L785E 66...

Page 67: ...PT L785U PT L785E 67...

Page 68: ...PT L785U PT L785E 68...

Page 69: ...PT L785U PT L785E 69...

Page 70: ...N 22 TBXA37201 LENS CHANGE SWITCH 23 TEEC0033 LENS EXCHANGE UNIT 24 TEEC5084 INHALATION DUCT 1 25 TEEC5085 1 INHALATION DUCT 2 26 TEEC5086 OPTICAL DUCT 1 27 TEEC5087 OPTICAL DUCT 2 Ref No Part No Part...

Page 71: ...RIZING PLATE IN B 79 XSB3 8FN SCREW XSB4 10FC SCREW XSN3 8 SCREW 80 XSN4 10 SCREW XSN4 18 SCREW XSS2 4FZ SCREW XTBT969Z SCREW XTN3 6G SCREW XTV3 10G SCREW XTV3 12A SCREW XTW3 8P TAPPING SCREW Ref No P...

Page 72: ...RANSISTOR Q1029 2SB1218A TRANSISTOR Q1030 2SD1819A TRANSISTOR 2SD1819AW Q1031 2SD1819A TRANSISTOR 2SD1819AW Q1032 2SB1218A TRANSISTOR Q1033 2SB1218A TRANSISTOR Q1034 2SB1218A TRANSISTOR Q1035 B1DHDD00...

Page 73: ...606 MA158 DIODE MA3X158 D9607 MA2Z72000L DIODE D9608 MA158 DIODE MA3X158 Ref No Part No Part Name Description Remarks D9609 MA2Z72000L DIODE D9611 MA158 DIODE MA3X158 D9612 MA2Z72000L DIODE COILS L100...

Page 74: ...01JA00 2 R1008 ERJ3GEYJ103 M 10K OHM J 1 16W R1009 ERJ3GEYJ103 M 10K OHM J 1 16W R1010 ERJ3GEYJ331 M 330 OHM J 1 16W R1011 ERJ3GEYJ560 M 56 OHM J 1 16W R1012 ERJ3GEYJ102 M 1K OHM J 1 16W R1013 ERJ3GEY...

Page 75: ...4 7KOHM J 1 16W R1149 ERJ3GEYJ331 M 330 OHM J 1 16W R1150 ERJ3GEYJ331 M 330 OHM J 1 16W R1151 ERJ3GEYJ473 M 47K OHM J 1 16W R1152 ERJ3GEYJ331 M 330 OHM J 1 16W Ref No Part No Part Name Description Re...

Page 76: ...063W R1295 ERJ3EKF2200 M 220 OHM 0 063W R1296 ERJ3EKF2200 M 220 OHM 0 063W R1297 ERJ3EKF1500 M 150 OHM 0 063W Ref No Part No Part Name Description Remarks R1298 ERJ3EKF1500 M 150 OHM 0 063W R1299 ERJ3...

Page 77: ...6W R1591 ERJ3GEYJ472 M 4 7KOHM J 1 16W R1592 ERJ3GEYJ103 M 10K OHM J 1 16W R1593 ERJ3GEYJ472 M 4 7KOHM J 1 16W Ref No Part No Part Name Description Remarks R1594 ERJ3GEYJ103 M 10K OHM J 1 16W R1595 ER...

Page 78: ...16W R1838 ERJ3GEYJ220 M 22 OHM J 1 16W R1839 ERJ3GEYJ103 M 10K OHM J 1 16W Ref No Part No Part Name Description Remarks R1840 ERJ3GEYJ103 M 10K OHM J 1 16W R1841 ERJ3GEYJ103 M 10K OHM J 1 16W R1842 E...

Page 79: ...560 OHM J 1 16W R3175 ERJ3GEYJ561 M 560 OHM J 1 16W R3176 ERJ3GEYJ561 M 560 OHM J 1 16W R3184 ERJ3GEYJ561 M 560 OHM J 1 16W R3185 ERJ3GEYJ561 M 560 OHM J 1 16W R3186 ERJ3GEYJ561 M 560 OHM J 1 16W R350...

Page 80: ...ECJ1XB1C103K C 0 01UF K 16V C1108 EEVHB0J330 E 33UF 6 3V C1109 ECJ1XB1C103K C 0 01UF K 16V C1110 EEVHB0J330 E 33UF 6 3V Ref No Part No Part Name Description Remarks C1111 ECJ1XB1C103K C 0 01UF K 16V...

Page 81: ...0 1UF 16V C1260 ECJ0EF1C104Z C 0 1UF 16V C1262 ECJ1XC1H471J C 470PF J 50V C1263 ECJ1XC1H121J C 120PF 50V Ref No Part No Part Name Description Remarks C1264 ECUX1H120JCV C 12PF 50V C1265 ECUX1H120JCV C...

Page 82: ...1 EEVHB1E330 E 33UF 25V C1542 EEVHB1E330 E 33UF 25V C1543 ECJ1XF1C104Z C 0 1UF Z 16V Ref No Part No Part Name Description Remarks C1544 F4D276050001 CAPACITOR C1545 F4D276050001 CAPACITOR C1546 F4D276...

Page 83: ...1C104Z C 0 1UF 16V C1808 EEVHB0G221 E 220UF 4V C1809 ECJ0EF1C104Z C 0 1UF 16V C1810 ECJ0EF1C104Z C 0 1UF 16V Ref No Part No Part Name Description Remarks C1811 ECJ0EF1C104Z C 0 1UF 16V C1812 ECJ1XF1C1...

Page 84: ...0 OHM J 1 10W JS1006 ERJ6GEY0R00 M 0 OHM J 1 10W JS1007 ERJ6GEY0R00 M 0 OHM J 1 10W JS1008 ERJ6GEY0R00 M 0 OHM J 1 10W JS1009 ERJ6GEY0R00 M 0 OHM J 1 10W JS1010 ERJ6GEY0R00 M 0 OHM J 1 10W JS1011 ERJ6...

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Panasonic PTL785U - LCD PROJECTOR UNIT, Service Manual

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