Sharp 29FL94 Service Manual
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Sharp 29FL94 Service Manual

Chassis no. gb-3u
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In the interests of user-safety (Required by safety regulations in some countries ) the set should be restored to its
original condition and only parts identical to those specified should be used.
» ELECTRICAL SPECIFICATIONS ......................................................................................................... 1
» IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
» LOCATION OF USER'S CONTROL ..................................................................................................... 4
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................ 5
» SERVICE ADJUSTMENT ..................................................................................................................... 9
» CHASSIS LAYOUT ............................................................................................................................. 12
» BLOCK DIAGRAM .............................................................................................................................. 13
» DESCRIPTION OF SCHEMATIC DIAGRAMS & WAVEFORMS ........................................................ 14
» SCHEMATIC DIAGRAMS ................................................................................................................... 15
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 24
» PARTS LIST ........................................................................................................................................ 30
» PACKING OF THE SET ...................................................................................................................... 39
POWER INPUT ........................................ 110~220V AC, 50/60 Hz
POWER RATING .................................................................. 145W
PICTURE SIZE ....................................... 2,193.5 cm
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ............................................... Hi-Bi-Potential Electrostatic
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ..................................... 45.75 MHz
Sound IF Carrier Frequency ...................................... 41.25 MHz
Color Sub-Carrier Frequency .................................... 42.17 MHz
AUDIO POWER
OUTPUT RATING .............. 7.5W + 7.5W (at 10% distortion and

SHARP CORPORATION

SERVICE MANUAL

MODEL
CONTENTS

ELECTRICAL SPECIFICATIONS

SPEAKER
SIZE ........................................................ 12 x 6 cm oval (2 pcs.)
2
(339sq inch)
VOICE COIL IMPEDANCE ............................... 8 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF ..................................................... 75 ohm Unbalanced
TUNING RANGES
VHF-Channels ............................................................... 2 thru 13
UHF-Channels ............................................................ 14 thru 69
CATV Channels ........................................................... 1 thru 125
(Nominal)
Dual CH Operate)
Specifications are subject to change without
prior notice.
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
COLOR TELEVISION
Chassis No. GB-3U
29FL94
(EIA, Channel Plan U.S.A.)
29FL94
S34Q129FL94//
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  • Page 1: Table Of Contents

    29FL94 SERVICE MANUAL S34Q129FL94// COLOR TELEVISION Chassis No. GB-3U 29FL94 MODEL In the interests of user-safety (Required by safety regulations in some countries ) the set should be restored to its original condition and only parts identical to those specified should be used.

  • Page 2: Important Service Safety Precaution

    29FL94 IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: WARNING X-RADIATION AND HIGH VOLTAGE LIMITS 1. For continued safety, no modification of any circuit 1.

  • Page 3: Safety Notice

    29FL94 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) Connect the resistor connection to all exposed metal BEFORE RETURNING THE RECEIVER parts having a return to the chassis (antenna, metal (Fire & Shock Hazard) cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop Before returning the receiver to the user, perform across the resistor.

  • Page 4: Location Of User's Control

    29FL94 LOCATION OF USER'S CONTROL...

  • Page 5: Installation And Service Instructions

    29FL94 INSTALLATION AND SERVICE INSTRUCTIONS Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic screwdrivers or TV alignment tools. (2) Before performing adjustments, the TV set must be on at least 15 minutes. CIRCUIT PROTECTION HIGH VOLTAGE CHECK High voltage is not adjustable but must be checked The receiver is protected by a 5.0A fuse (F1701),...
  • Page 6 29FL94 For adjustments of this model, the bus data is converted to various analog signals by the D/A converter circuit. Note: There are still a few analog adjustments in this series such as focus and master screen voltage. Follow the steps below whenever the service adjustment is required. See "Table-B" to determine, if serv- ice adjustments are required.
  • Page 7 TINT-S 0-127 (00h-7Fh) 62 (3Eh) Component Input C-TRAP 0-1 (00h-01h) 0 (00h) AUTO FRESH 0-1 (00h-01h) 0 (00h) SHARP P F 0-1 (00h-01h) 1 (01h) CD MATRIX 0-3 (00h-03h) 2 (02h) B-Y ATT 0-1 (00h-01h) 0 (00h) R-Y ATT 0-1 (00h-01h)
  • Page 8 29FL94 DATA SERVICE NOTES FIXED VALUE ADJUSTMENT ITEM NUMBER (HEX) RANGE INITIAL VALUE EW CORNER BOTTOM 19-81 (13h-51h) 50 (32h) Offset toward D13. NOISE DET LEVEL 0-3 (00h-03h) 0 (00h) V CENTERING 0-63 (00-3Fh) 36 (24h) V-AGC 0-1 (00h-01h) 0 (00h)

  • Page 9: Service Adjustment

    29FL94 Holding down both the VOL-up and CH-up buttons on the TV set at service mode for more than 2 seconds will automatically write the above initial values into IC2101. ADJUSTMENT PART REPLACED NOTES NECESSARY UNNECESSARY IC2001 Data is stored in IC2101.
  • Page 10 29FL94 Sub-Tint Adjustment Note: Aging for 10 min before adjustment. After the adjustment of V-center and V-size, re- 1. Receive the half color bar signal. adjustment for this V-line. RF INPUT (TU51) 2. Get into Y-Mute by R/C, or by setting the "V11" bus data to "01".

  • Page 11: Mts Adjustment

    29FL94 Ë MTS ADJUSTMENT MTS Level Adjustment 1. Set the sound volume above 1. Monoral signal: 400Hz, 100% modulation 2. Confirm "EX4" data is "5Ah". 3. Vary the "M01" bus data until the voltage to pin (39) of IC3001 to become the value as stated below.

  • Page 12: Chassis Layout

    29FL94 CHASSIS LAYOUT...

  • Page 13: Block Diagram

    29FL94 BLOCK DIAGRAM...

  • Page 14: Description Of Schematic Diagrams & Waveforms

    29FL94 DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: NOTES: 1. Photographs taken on a standard gated color bar 1. The unit of resistance "ohm" is omitted. signal, the tint setting adjusted for proper color. The (K=kW=1000W, M=MW) wave shapes at the red, green and blue cathodes of 2.

  • Page 15: Schematic Diagrams

    29FL94 SCHEMATIC DIAGRAM: CRT Unit...
  • Page 16 29FL94 SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 17 29FL94...
  • Page 18 29FL94 SCHEMATIC DIAGRAM: MAIN-2 Unit...
  • Page 19 29FL94...
  • Page 20 29FL94 SCHEMATIC DIAGRAM: 3-LINE Y/C Unit...
  • Page 21 29FL94...
  • Page 22 29FL94 SCHEMATIC DIAGRAM: AUDIO Unit...
  • Page 23 29FL94 SCHEMATIC DIAGRAM: POWER Unit...
  • Page 24 29FL94 PWB-A: MAIN Unit (A side)
  • Page 25 29FL94...
  • Page 26 29FL94 PWB-A: MAIN Unit (B side)
  • Page 27 29FL94...
  • Page 28 29FL94 PWB-B: CRT Unit (Wiring side) PWB-C: 3-LINE Y/C Unit (Wiring side) PWB-C: 3-LINE Y/C Unit (Chip Parts side)
  • Page 29 29FL94 PWB-S: AUDIO Unit (Wiring side) PWB-G: POWER Unit (Wiring side) PWB-S: AUDIO Unit (Chip Parts side)

  • Page 30: Printed Wiring Board Assemblies

    X PC123FY8 å IC703 VHiSE130N++-F X SE130N ç å in USA: Contact your nearest SHARP Parts Distributor to order. For IC751 VHiPQ09RDA1-1 X PQ090RDA1SZ location of SHARP Parts Distributor, Please call Toll-Free; 1- IC900 VHiCXA2089Q-2Y X CXA2089Q-6T 800-BE-SHARP IC1403 VHiPQ05RDA1-1...
  • Page 31 29FL94 Ref. No. Part No. Description Code Ref. No. Part No. Description Code D413 RH-EX0614GEZZY X Zener Diode, 5.6V CAPACITORS D414 RH-EX0614GEZZY X Zener Diode, 5.6V VCEA0A1HW105M+X 1 50V Electrolytic D454 RH-EX0628GEZZY X Zener Diode, 8.2V VCEA0A1HW475M+X 4.7 50V Electrolytic...
  • Page 32 29FL94 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C518 VCQYTA2AA473J+ X 0.047 100V Mylar C809 VCKYCY1CF104ZY X 0.1 16V Ceramic C522 VCFYFA1HA334J+ X 0.33 50V Mylar C810 VCEA0A1CW477M+X 470 16V Electrolytic C523 VCEA0A1HW105M+X 1 50V Electrolytic C812 VCQYTA1HM104J+ X 0.1...
  • Page 33 29FL94 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R411 VRS-CY1JF102JY X 1k 1/16W Metal Oxide AA C3018 VCEA0A1HW105M+X 1 50V Electrolytic R412 VRS-CY1JF101JY X 100 1/16W Metal Oxide AA C3021 VCEA0A1HW475M+X 4.7 50V Electrolytic R413...
  • Page 34 29FL94 Ref. No. Part No. Description Code Ref. No. Part No. Description Code å R628 VRN-RL3ABR47J+ X 0.47 Metal Film R910 VRD-RA2BE102JY X 1k 1/8W Carbon ç å R651 VRS-RG2HC270J+ X 27 1/2W Metal Oxide AB R911 VRS-CY1JF683JY X 68k 1/16W Metal Oxide AA ç...
  • Page 35 29FL94 Ref. No. Part No. Description Code Ref. No. Part No. Description Code J921 QSOCD0456CEZZ X Socket, S-Video R2040 VRS-CY1JF102JY X 1k 1/16W Metal Oxide AA J1401 QTANJ1101SEZZ X Terminal, AV IN/OUT R2041 VRS-CY1JF333JY X 33k 1/16W Metal Oxide AA...
  • Page 36 29FL94 Ref. No. Part No. Description Code Ref. No. Part No. Description Code å R854 VRS-SV2HC272J X 2.7k 1/2W Metal Oxide AB C1413 VCKYCY1HF103ZY X 0.01 50V Ceramic å R855 VRS-SV2HC272J X 2.7k 1/2W Metal Oxide AB C1414 VCCCCY1HH3R0CYX 3p...
  • Page 37 29FL94 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R1467 VRS-CY1JF682JY X 6.8k 1/16W Metal Oxide AA C3695 VCE9GA1HW475M+X 4.7 50V Electrolytic, R1473 VRS-CY1JF102JY X 1k 1/16W Metal Oxide AA (N.P) R1475 VRS-CY1JF102JY X 1k 1/16W Metal Oxide AA...

  • Page 38: Packing Parts

    QPLGA0017CEZZ X Plug CABINET PARTS CCABAA543WEH0 X Front Cabinet Ass’y Not Available SUPPLIED ACCESSORIES – Front Cabinet — HBDGB3141CESA X SHARP Badge GCOVAA282WJKA X LED/RC Cover RRMCGA108WJSA X Infrared R-C GCOVHA017WJKZ X Cover TiNS-B123WJZZ X Instruction Book GDORFA027WJKB X Door...

  • Page 39: Packing Of The Set

    29FL94 PACKING OF THE SET Polyethylene Bag Operation Manual Infrared R/C Unit Batteries Polyethylene Sheet Buffer Material FRONT Packing Case Use tape to fix the top side of packing case. REAR Use 12 staples to fix the bottom side of packing case.
  • Page 40 29FL94 COPYRIGHT © 2004 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

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