Sharp 29FL91M Service Manual
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Sharp 29FL91M Service Manual

Sharp 29FL91M Service Manual

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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 ........................................................................................ 23
» REPLACEMENT PARTS LIST ............................................................................................................ 27
» PACKING OF THE SET ...................................................................................................................... 35
POWER INPUT ..................................................... 120V AC, 60 Hz
POWER RATING .................................................................. 135W
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 .............. 5.0W + 5.0W (at 10% distortion and

SHARP CORPORATION

SERVICE MANUAL

MODELS
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
29FL91M
(EIA, Channel Plan U.S.A.)
29FL91M
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  • Page 1: Table Of Contents

    29FL91M SERVICE MANUAL COLOR TELEVISION Chassis No. GB-3U 29FL91M MODELS 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

    29FL91M IMPORTANT SERVICE SAFETY PRECAUTION Service work should be performed only by qualified service technicians who are Ë 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

    29FL91M 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

    29FL91M LOCATION OF USER'S CONTROL Front Panel POWER INSIDE DOOR Press → On. Press again → Off. VIDEO/AUDIO IN 2 TERMINALS REMOTE CONTROL SENSOR CHANNEL UP/DOWN MENU (') Selects next higher channel. Press → Accesses MAIN MENU. ( " ) Selects next lower channel.

  • Page 5: Installation And Service Instructions

    29FL91M 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. HIGH VOLTAGE CHECK CIRCUIT PROTECTION The receiver is protected by a 4.0A fuse (F701),...

  • Page 6: Service Mode

    29FL91M 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 29FL91M 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) B.

  • Page 9: Service Adjustment

    29FL91M 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: Focus Adjustment

    29FL91M 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. • RF INPUT (TU51) adjustment for this V-line. 2. Get into Y-Mute by R/C, or by setting the "V11" bus Vertical Phase Adjustment data to "01".

  • Page 11: Mts Adjustment

    29FL91M 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

    29FL91M CHASSIS LAYOUT...

  • Page 13: Block Diagram

    29FL91M BLOCK DIAGRAM...

  • Page 14: Description Of Schematic Diagrams & Waveforms

    29FL91M 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. Ω Ω Ω signal, the tint setting adjusted for proper color. The (K=k =1000...

  • Page 15: Schematic Diagrams

    29FL91M SCHEMATIC DIAGRAM: CRT Unit...
  • Page 16 29FL91M...
  • Page 17 29FL91M...
  • Page 19 29FL91M...
  • Page 20 29FL91M SCHEMATIC DIAGRAM: 3-LINE Y/C Unit...
  • Page 21 29FL91M...
  • Page 22 29FL91M SCHEMATIC DIAGRAM: AUDIO Unit...

  • Page 23: Printed Wiring Board Assemblies

    29FL91M PRINTED WIRING BOARD ASSEMBLIES 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 24 29FL91M PWB-A: MAIN Unit (Components Side)
  • Page 25 29FL91M PWB-A: MAIN Unit (Chip Parts Side)
  • Page 26 29FL91M PWB-S: AUDIO Unit (Wiring Side) PWB-S: AUDIO Unit (Chip Parts Side)

  • Page 27: Replacement Parts List

    3. PART NO. 4. DESCRIPTION IC751 VHiPQ09RD11-1 X PQ09RD11 IC900 VHiCXA2089Q-2Y X CXA2089Q in USA: Contact your nearest SHARP Parts Distributor to order. For IC1403 VHiPQ05RD11-1 X PQ05RD11 location of SHARP Parts Distributor, Please call Toll-Free; 1- IC2001 RH-iXA418WJZZQ X I.C. 800-BE-SHARP...
  • Page 28 29FL91M Ref. No. Part No. Description Code Ref. No. Part No. Description Code CAPACITORS PWB-A: DUNTKB567WEV7 VCEA0A1HW105M+X 1 Electrolytic MAIN UNIT (Continued) VCEA0A1HW475M+X 4.7 Electrolytic VCEA0A0JW108M+ X 1000 6.3V Electrolytic ∗ ∗ D455 VHD1SS119//-1 X 1SS119 VCKYCY1HF103Z X 0.01 Ceramic ∗...
  • Page 29 29FL91M Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKB567WEV7 ∗ C903 VCKYCY1HB681K X 680p 50V Ceramic MAIN UNIT (Continued) C904 VCEA0A1HW105M+X 1 Electrolytic C905 VCEA0A1HW105M+X 1 Electrolytic ∗ C906 VCKYCY1HB681K X 680p 50V Ceramic...
  • Page 30 29FL91M Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ PWB-A: DUNTKB567WEV7 R449 VRS-CY1JF101J X 100 1/16W Metal Oxide ∗ R450 VRS-CY1JF101J X 100 1/16W Metal Oxide MAIN UNIT (Continued) R451 VRS-RG3AB103J+ X 10k 1W Metal Oxide å...
  • Page 31 29FL91M Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ PWB-A: DUNTKB567WEV7 R926 VRS-CY1JF680J X 68 1/16W Metal Oxide ∗ R927 VRS-CY1JF750J X 75 1/16W Metal Oxide ∗ MAIN UNIT (Continued) R929 VRS-CY1JF473J X 47k 1/16W Metal Oxide ∗...

  • Page 32: Crt Unit

    29FL91M Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKB567WEV7 P651 QPLGN0361CEZZA X Plug, 3pin(TP651-3) P702 QPLGN0269GEZZ X Plug, 2pin(P1-2) MAIN UNIT (Continued) P703 QPLGN0260CEZZ X Plug, 2pin(M1-2) P2401 QPLGN0661CEZZA X Plug, 6pin ∗ R2064 VRS-CY1JF332J X 3.3k 1/16W Metal Oxide...

  • Page 33: Integrated Circuits

    29FL91M Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ PWB-B: DUNTKA527WEV6 C1413 VCKYCY1HF103Z X 0.01 Ceramic ∗ C1414 VCCCCY1HH3R0C X 3.0p Ceramic CRT UNIT (Continued) C1415 VCE9GA1CW106M+X 10 Elect.(N,P) C1416 VCEA0A1CW477M+X 470 Electrolytic ∗ ∗...

  • Page 34: Packing Parts

    C3531 VCQYTA1HM104J+ X 0.1 Mylar ∗ C3533 VCKYCY1EB223K X 0.022 25V Ceramic C3539 VCFYFA1HA334J+ X 0.33 Mylar HBDGB3141CESA X SHARP Badge C3540 VCEA0A1HW105M+X 1 Electrolytic GCOVAA282WJKA X LED/RC Cover C3541 VCEA0A1HW105M+X 1 Electrolytic GCOVHA017WJKZ X Cover C3694 VCE9GA1HW475M+X 4.7 Elect.(N,P) GDORFA027WJKA X Door C3695 VCE9GA1HW475M+X 4.7...

  • Page 35: Packing Of The Set

    29FL91M 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 36 QRC0001-M May. 2003 Modify : SEMEX Design and Production Information SHARP ELECTRONICA MEXICO S. A. DE C. V. Design base : JAPAN Quality & Reliability Control Center Production : SEMEX Blvd. SHARP No. 3510 Parque Industrial Rosarito...

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