Service manual

ManualsBrandsSharp ManualsCRT TV27N S300

27N-S300

CN27S30

COLOR TELEVISION

Chassis No. SN-81A

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.....................................................................................................6

» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................ 7

» CHASSIS LAYOUT ............................................................................................................................. 13

» BLOCK DIAGRAM ............................................................................................................................. 14

» SCHEMATIC DIAGRAMS................................................................................................................... 15

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 23

» REPLACEMENT PARTS LIST............................................................................................................ 27

» PACKING OF THE SET ..................................................................................................................... 36

Page

POWER INPUT ................................................... 120 V AC 60 Hz

POWER RATING ...................................................................126W

PICTURE SIZE ......................................... 2,187 cm

(339 sq inch)

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

(Nominal)

AUDIO POWER

OUTPUT RATING .............. 1.3W + 1.3W (at 10% distortion and

Dual CH Operate)

SHARP CORPORATION

CONTENTS

ELECTRICAL SPECIFICATIONS

Specifications are subject to change without

prior notice.

SPEAKER

SIZE ...................................................................... 8 cm (Round)

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

(EIA, Channel Plan U.S.A.)

SERVICE MANUAL

27N-S300

CN27S30

MODELS

This document has been published to be used for after

sales service only.

The contents are subject to change without notice.

S20X227N-S300

SERVICE MANUAL COLOR TELEVISION

MODELS 27N-S300/CN27S30

Summary of content (35 pages)

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27N-S300 CN27S30 SERVICE MANUAL SERVICE MANUAL S20X227N-S300 COLOR TELEVISION Chassis No. SN-81A PI P /MT S COLOR TELEVISION MODELS 27N-S300 CN27S30 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. CONTENTS Page » ELECTRICAL SPECIFICATIONS .........................................................................................................
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7N-S300 CN27S30 IMPORTANT SERVICE SAFETY PRECAUTION Service work should be performed only by qualified service technicians who are throughly 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 should be attempted. 2. Disconnect AC power before servicing. 3. Semiconductor heat sinks are potential shock hazards when the chassis is operating. 4.
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27N-S300 CN27S30 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) • Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon and etc.) and measure the AC voltage drop across the resistor. AII checks must be repeated with the AC line cord plug connection reversed. (If necessary, a nonpolarized adapter plug must be used only for the purpose of completing these check.
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27N-S300 CN27S30 PRECAUTIONS A PRENDRE LORS DE LA REPARATION Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants. AVERTISSEMENT LIMITES DES RADIATIONS X ET DE LA HAUTE TENSION 1. N'entreprendre aucune modification de tout circuit. C'est dangereux. 2. Débrancher le récepteur avant toute réparation. 3.
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27N-S300 CN27S30 PRECAUTIONS A PRENDRE LORS DE LA REPARATION (Suite) • Toucher avec la sonde d'essai les pièces métalliques exposées qui présentent une voie de retour au châssis (antenne, coffret métallique, tête des vis, arbres de commande et des boutons, écusson, etc.) et mesurer la chute de tension CA en-travers de la résistance. Toutes les vérifications doivent être refaites après avoir inversé la fiche du cordon d'alimentation.
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27N-S300 CN27S30 LOCATION OF USER'S CONTROL Front Panel A POWER Press → On. Press again → Off. B VOLUME UP/DOWN (+) Increases sound. (–) Decreases sound. POWER POWER C SENSOR AREA FOR REMOTE CONTROL D CHANNEL UP/DOWN (') Selects next higher channel. (") Selects next lower channel. • Press both at the same time to access the MAIN Menu screen. E – VOL + CH A E – VOL + CH B D C VIDEO/AUDIO IN 2 TERMINALS (VIDEO/AUDIO terminals are also provided on the rear.
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27N-S300 CN27S30 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 The receiver is protected by a 4.0A fuse (F701), mounted on PWB-A, wired into one side of the AC line input.
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27N-S300 CN27S30 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 service adjustments are required. 1. Service mode To enter the service mode and exit service mode.
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27N-S300 CN27S30 SERVICE NUMBER S01 S02 S03 S04 S05 S06 S07 S08 S09 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 OP1 OP2 M01 M02 M03 M04 M05 P01 P02 P03 P04 P05 P06 P07 DATA ADJUSTMENT ITEM INITIAL VALUE PICTURE TINT COLOR BRIGHTNESS SHARPNESS VERTICAL PHASE HORIZONTAL PHASE RF-AGC VERTICAL AMP PIF VCO R CUT-OFF G CUT -OFF B CUT-OFF G GAIN B GAIN TRAP 55 46 32 40 28 00 12 23 20 2C 00 00 00 7F 7F 00 20 17 00 20 7A 00 00 00 00 0A 20 1C 20 1B 30 29 2E 09 0A 00 0B C.C.
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27N-S300 CN27S30 SERVICE ADJUSTMENT VCO Adjustment White Balance Adjustment 1. Connect a digital voltmeter between pin (44) of IC201 and ground. 2. Receive a good local channel. 3. Enter the service mode and select the service adjustment "S10". 4. Adjust the data so that digital voltmeter reads 2.2V. 5. Adjustment is completed, remove the voltmeter, return to "normal" mode. 1. Receive a good local channel. 2.
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27N-S300 CN27S30 Sub-Brightness Adjustment 3.58MHz Trap Adjustment 1. Receive a good local channel. 2. Make sure the customer brightness control is set to center position. 3. Enter the service mode and select the service adjustment "S04". 4. Adjust "S04" data value to obtain normal brightness level. 1. Receive a good local channel. 2. Enter the service mode and select the service adjustment "S16". 3. This is a two position adjustment, "00" is ON, "01" is OFF. 4.
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27N-S300 CN27S30 MTS ADJUSTMENT P-IN-P ADJUSTMENT MTS Level Adjustment P-IN-P Y LEVEL Adjustment 1. Feed the following monaural signal to pin (14) of IC3001. Monaural signal : 300Hz, 245mVrms 2. Connect the rms voltmeter to pin (39) of IC3001. 3. Enter the service mode and select the service adjustment "M01". 4. Adjust the data so that the rms voltmeter reads 490 ± 10mVrms. 1. Receive a good local channel. 2. Enter the service mode and select the service adjustment "P01". 3.
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27N-S300 CN27S30 CHASSIS LAYOUT PWB-H PWB-R PWB-B H G PWB-A F E D C B A 10 1 11 122 13 3 14 15 4 13 16 5 17 18 6 19
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27N-S300 CN27S30 BLOCK DIAGRAM HH GG FF EE DD CC BB AA 1 1 2 32 4 3 5 6 4 14 7 5 8 9 6 10
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27N-S300 CN27S30 DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: 1. Photographs taken on a standard gated color bar signal, the tint setting adjusted for proper color. The wave shapes at the red, green and blue cathodes of the picture tube depend on the tint, color level and picture control. 2. indicates waveform check points (See chart, waveforms are measured from point indicated to chassis ground.) NOTES: 1. The unit of resistance "ohm" is omitted. (K=kΩ=1000Ω, M=MΩ) 2.
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27N-S300 CN27S30 27N-S300 CN27S30 SCHEMATIC DIAGRAM: MAIN-1 Unit J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 16~17 12 13 14 15 16 17 18 19 20
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27N-S300 CN27S30 27N-S300 CN27S30 SCHEMATIC DIAGRAM: MAIN-2 Unit J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 18~19 12 13 14 15 16 17 18 19 20
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27N-S300 CN27S30 27N-S300 CN27S30 SCHEMATIC DIAGRAM: P-IN-P Unit J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 20~21 12 13 14 15 16 17 18 19 20
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27N-S300 CN27S30 SCHEMATIC DIAGRAM: CRT and FRONT AV Units HH GG FF EE DD CC BB AA 1 1 2 32 4 3 6 4 5 22 7 5 8 9 6 10
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27N-S300 CN27S30 PRINTED WIRING BOARD ASSEMBLIES H G F E PWB-B: CRT Unit (Wiring Side) D C B PWB-H: FRONT AV Unit (Wiring Side) A 10 1 11 122 13 3 15 4 14 23 16 5 17 18 6 19
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27N-S300 CN27S30 HH GG FF EE DD CC BB PWB-A: MAIN Unit (Wiring Side) AA 1 1 2 32 4 3 6 4 5 24 7 5 8 9 6 10
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27N-S300 CN27S30 H G F E D C B PWB-A: MAIN Unit (Chip Parts Side) A 10 1 11 122 13 3 15 4 14 25 16 5 17 18 6 19
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27N-S300 CN27S30 HH GG FF EE PWB-R : P-IN-P Unit (Wiring Side) DD CC BB PWB-R : P-IN-P Unit (Chip Parts Side) AA 1 1 2 32 4 3 6 4 5 26 7 5 8 9 6 10
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27N-S300 CN27S30 Ref. No. Part No. ★ Description Code Ref. No. ★ Part No. Description Code LISTE DES PIECES PARTS LIST PARTS REPLACEMENT CHANGE DES PIECES Replacement parts which have these special safety characteristics identified in this manual; electrical components having such features are identified by å and shaded areas in the Replacement Parts Lists and Schematic Diagrams.
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27N-S300 CN27S30 Ref. No. ★ Part No. Description Code Ref. No.
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27N-S300 CN27S30 Ref. No. Part No. ★ Description Code Ref. No. PWB-A: DUNTKA120WEK0/1 C505 C507 C508 C509 C510 C511 C512 C513 C514 C551 C552 C603 C604 çå C607 çå C608 C612 C614 C631 C632 C633 C652 C653 å C701 MAIN UNIT (Continued) TRANSFORMERS å çå å å T601 T602 T701 T701 RTRNZ0168CEZZ J H-Driver RTRNF0041MEZZ M H-Out RTRNP0533CEZZ M Power Trans. RTRNP0549CEZZ M Power Trans. (CN27S30) AH BA AK AM CAPACITORS [EL.··· Electrolytic, M-Poly.··· Metalized Polypro Film] C51 VCEA0A1CW476M J 47 16V EL.
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N-S300 CN27S30 Ref. No. ★ Part No. Description Code Ref. No.
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27N-S300 CN27S30 Ref. No. Part No. ★ Description Code Ref. No.
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27N-S300 CN27S30 Ref. No. Part No. ★ Description Code Ref. No.
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27N-S300 CN27S30 Ref. No. ★ Part No. Description Code Ref. No. Q853 Q854 Q855 Q856 Q881 PWB-C: DUNTK9310WEK1 CRT UNIT FRONT AV UNIT VS2SC3198-Y-1 VS2SC3789//2E or VS2SC3619LB-1 VS2SC3198-Y-1 VS2SC3789//2E or VS2SC3619LB-1 VS2SC3198-Y-1 VS2SC3789//2E or VS2SC3619LB-1 VS2SA1266-Y-1 AA AF J 2SC3198(Y) J 2SC3789 AA AF J 2SC3198(Y) J 2SC3789 AA AF J 2SA1266(Y) AA You can substitute “RH-DX0475CEZZ” for “VHD1SS119//-1”.
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27N-S300 CN27S30 Ref. No. ★ Part No. Description Code Ref. No.
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27N-S300 CN27S30 Ref. No. ★ Part No. Description Code Ref. No. CCABA1327MES0 Not Available GCOVA1033MEKA HBDGB1009MESA JBTN-1101MEKA JBTN-1102MEKA GCABB1131MEKA M – M M M M M ★ Description Code MISCELLANEOUS PARTS CABINET PARTS 1 1-1 1-2 1-3 1-4 1-5 2 Part No.
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27N-S300 CN27S30 Ref. No. Part No. ★ Code No. Part No. PACKING OFRef. THE SET Description ★ Description Code ★ Polyethylene Bag Operation Manual Guarantee Card Infrared R/C Unit ★ Batteries ★ Wrapping Sheet ★ Buffer Material FRONT ★ Packing Case Use tapes to fix the packing case. REAR ★ MARK : Not replacement items.
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27N-S300 CN27S30 Ref. No. Part No. ★ Description Code Ref. No. 37 Part No.
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27N-S300 CN27S30 Ref. No. Part No. ★ Description Code Ref. No. ★ Part No. Description Code COPYRIGHT © 2000 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.