Service manual

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32SF670

This document has been published to be used for after

sales service only.

The contents are subject to change without notice.

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.

COLOR TELEVISION

Chassis No. GB-D7

Page

» ELECTRICAL SPECIFICATIONS .........................................................................................................1

» IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2

» LOCATION OF USER'S CONTROL .....................................................................................................5

» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................6

» SERVICE ADJUSTMENT ...................................................................................................................16

» CHASSIS LAYOUT .............................................................................................................................20

» BLOCK DIAGRAM ..............................................................................................................................21

» DESCRIPTION OF SCHEMATIC DIAGRAMS & WAVEFORMS ........................................................22

» SCHEMATIC DIAGRAMS ...................................................................................................................23

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 32

» PARTS LIST ........................................................................................................................................38

» PACKING OF THE SET ......................................................................................................................47

SPEAKER

SIZE ........................................................ 12 x 6 cm oval (2 pcs.)

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 (Analog)

CATV Channels ............................................. 1 thru 135 (Digital)

Digital Terrestrial Broadcast (VHF/UHF) ....................... 2 thru 69

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

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

POWER RATING .................................................................. 150W

PICTURE SIZE ........................................... 3074 cm

(476sq inch)

CONVERGENCE ............................................................. Magnetic

SWEEP DEFLECTION .................................................... Magnetic

FOCUS ............................................... Hi-Bi-Potential Electrostatic

INTERMEDIATE FREQUENCIES

Picture IF Carrier Frequency ...... 45.75 MHz (Analog Terrestrial)

Sound IF Carrier Frequency ....... 41.25 MHz (Analog Terrestrial)

Color Sub-Carrier Frequency ..... 42.17 MHz (Analog Terrestrial)

IF Center Frequency ........................ 44 MHz (Digital Terrestrial)

(Nominal)

AUDIO POWER

OUTPUT RATING .............. 5.0W + 5.0W (at 10% distortion and

Dual CH Operate)

Specifications are subject to change without

prior notice.

ELECTRICAL SPECIFICATIONS

MODEL

SERVICE MANUAL

32SF670

CONTENTS

No.S47E632SF670/

Summary of content (48 pages)

PAGE 1
32SF670 SERVICE MANUAL No.S47E632SF670/ COLOR TELEVISION Chassis No. GB-D7 MODEL 32SF670 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 ......................................................................................................... 1 » IMPORTANT SERVICE SAFETY PRECAUTION ...............................
PAGE 2
32SF670 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 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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2SF670 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, 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.) Any current measured must not exceed 0.
PAGE 4
32SF670 Precautions for using lead-free solder 1 Employing lead-free solder "PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder. Example: LFa Indicates lead-free solder of tin, silver and copper. 2 Using lead-free wire solder When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder.
PAGE 5
32SF670 LOCATION OF USER'S CONTROL Front Panel POWER MENU – VOL + CH PULL-OPEN POWER MENU – VOL + CH POWER Press → On. Press again → Off. VIDEO/AUDIO IN 2 TERMINALS (INSIDE DOOR) REMOTE CONTROL SENSOR MENU Press → Accesses MAIN MENU. Press again → Exits MAIN MENU. VOLUME UP/DOWN (k) Increases sound. (l) Decreases sound. CHANNEL UP/DOWN (a) Selects next higher channel. (s) Selects next lower channel. Basic Remote Control Functions Infrared Transmitter Window POWER Press → On.
PAGE 6
32SF670 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.
PAGE 7
32SF670 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 4.
PAGE 8
32SF670 4:3-Def-Adj A. Deflection Bus Setting no. Item. DATA D01 V-SHIFT FIX D02 H-SHIFT D03 Range Remark 0…7 0 ADJ V-SHIFT [13h D2…D0] H-PHASE [16h D4…D0] 0 … 31 H-PHASE.DTV V-POS-4:3 ADJ µ-con 0 … 255 V-PHASE.DTV D04 V-SIZE-4:3 ADJ 0 … 63 V-SIZE.DTV D05 H-SIZE-4:3 ADJ 0 … 63 H-SIZE.DTV D06 VS-CORRECT -4:3 V-LINEARITY -4:3 E/W PARABOLA -4:3 E/W TRAPEZIUM -4:3 E/W CORNER -4:3 ADJ 0 … 63 VS-CORRECT.DTV 0 … 63 V-LINEARITY.
PAGE 9
32SF670 no. Item.
PAGE 10
32SF670 DTV-Picture-Adj YUV-Picture-Adj TV-Picture-Adj B. Video Bus Setting no. Item.
PAGE 11
no. Item.
PAGE 12
RR-AV F-AV S-VIDEO COLOR TEMP 32SF670 no. Item.
PAGE 13
32SF670 no. Item.
PAGE 14
32SF670 no. Item. DATA V99 OSD-LVL FIX V100 YLPF FIX V101 C.
PAGE 15
32SF670 C. Sound Bus Setting no. Item. DATA M01 MTS-ATT ADJ M02 MTS-VCO FIX M03 MTS-FILT FIX M04 MTS-WBND ADJ M05 MTS-SPEC ADJ M06 SUB-VOL FIX M07 FAO-VOL FIX REG ATT [00h D3..D0] VCO [01h D5..D0] FILTER [02h D5..D0] WIDEBAND [04h D5..D0] SPECTRAL [03h D5..D0] VOL [07h,08h D5..D0] VOL [07h,08h D5..D0] D. Option Setting no. Item.
PAGE 16
32SF670 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. PART REPLACED ADJUSTMENT NECESSARY UNNECESSARY NOTES IC801 X The adjustment is needed to compensate for characteristics of parts including IC801 and MTS level (M01).
PAGE 17
32SF670 Sub-picture and Sub-Bright Adjustments Sub-Color Adjustment 1. Receive the window pattern signal. • RF INPUT (TU1101) 2. Get into service adjustment data "V01" and "V04" and set the luminance as shown in figure "A" and "B" as below respectively. • COMPONENT INPUT 3. Get in service adjustment data "V11" and "V14" and set the luminance as shown in figure "A" and "B" as below respectively. 1. Receive a good local channel. 2. Make sure the customer color control is set to center position .
PAGE 18
32SF670 Ë MTS ADJUSTMENT Vertical Phase Adjustment (SCREEN FORMAT 4:3) 1. Enter the service mode and input data of “00” on "D01". 2. Adjust "D03" data value so that picture is centered. (SCREEN FORMAT 16:9) 3. Input data of "00" on "D11". 4. Input data of "D13" is additional 10 steps from data "D03". MTS Level Adjustment 1. Set the sound volume above 1. Monoral signal: 400Hz, 100% modulation 2. Vary the "M01" bus data until the voltage to pin (39) of IC3001 to become the value as stated below.
PAGE 19
32SF670 -MEMO- 19
PAGE 20
32SF670 CHASSIS LAYOUT 20
PAGE 21
32SF670 BLOCK DIAGRAM 21
PAGE 22
32SF670 DESCRIPTION OF SCHEMATIC DIAGRAMS 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=kW=1000W, M=MW) 2.
PAGE 23
32SF670 SCHEMATIC DIAGRAM: CRT Unit H G F E D C B A 1 2 3 4 5 6 23 7 8 9 10
PAGE 24
32SF670 SCHEMATIC DIAGRAM: MAIN-1 Unit H G F E D C B A 1 2 3 4 5 24 6 7 8 9 10
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32SF670 10 11 12 13 14 15 25 16 17 18 19
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32SF670 SCHEMATIC DIAGRAM: MAIN-2 Unit H G F E D C B A 1 2 3 4 5 26 6 7 8 9 10
PAGE 27
32SF670 10 11 12 13 14 15 27 16 17 18 19
PAGE 28
32SF670 SCHEMATIC DIAGRAM: 2-LINE Y/C Unit H G F E D C B A 1 2 3 4 5 28 6 7 8 9 10
PAGE 29
32SF670 10 11 12 13 14 15 29 16 17 18 19
PAGE 30
32SF670 SCHEMATIC DIAGRAM: CONTROL Unit H G F E D C B A 1 2 3 4 5 30 6 7 8 9 10
PAGE 31
32SF670 10 11 12 13 14 15 31 16 17 18 19
PAGE 32
SF670 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Components Side) H G F E D C B A 1 2 3 4 5 32 6 7 8 9 10
PAGE 33
32SF670 10 11 12 13 14 15 33 16 17 18 19
PAGE 34
32SF670 PWB-A: MAIN Unit (Components side) H G F E D C B A 1 2 3 4 5 34 6 7 8 9 10
PAGE 35
32SF670 10 11 12 13 14 15 35 16 17 18 19
PAGE 36
32SF670 H G F E D PWB-B: CRT Unit (Wiring Side) C B A PWB-D: 2-LINE Y/C Unit (Wiring Side) 1 2 3 4 PWB-D: 2-LINE Y/C Unit (Chip Parts Side) 5 6 36 7 8 9 10
PAGE 37
32SF670 H G F E D C B A PWB-F: CONTROL Unit (Wiring Side) 1 2 3 4 5 6 37 7 8 9 10
PAGE 38
32SF670 Ref. No. Part No. ★ Description Code Ref. No. PARTS LIST 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. The use of a substitute replacement part which does no have the same safety characteristic as the factory recommended replacement parts shown in this service manual may create shock, fire or other hazards. 2.
PAGE 39
32SF670 Ref. No. ★ Part No. Description Code Ref. No.
PAGE 40
32SF670 Ref. No. C681 C682 C685 C691 C692 å C700 å C701 C702 å C703 å C705 å C708 C710 C711 C712 C713 C714 C715 å C723 å C725 C726 C729 C730 C731 C732 C733 C739 C741 C746 C747 C750 C752 C753 C755 C756 C763 C780 C781 C790 C791 C801 C802 C803 C804 C805 C806 C807 C808 C809 C810 C811 C813 C814 C815 C816 C818 C819 C820 C821 C824 C825 C826 C827 C828 C830 C831 C832 C833 C834 C837 C838 C839 C840 C841 C842 C843 C844 Part No.
PAGE 41
32SF670 Ref. No. ★ Part No.
PAGE 42
32SF670 Ref. No. R532 R533 R534 R535 R536 R538 R539 R540 R541 R543 R603 å R604 R605 R606 å R609 R610 å R611 å R615 å R621 å R622 R623 å R624 R625 å R627 R628 çå R651 çå R652 çå R653 çå R654 R663 R672 R673 R674 R675 R681 R684 R685 R686 R687 å R688 å R690 R691 R692 R693 R694 R695 R696 R697 R698 R699 R700 R703 R704 R705 R707 R711 å R717 R725 R726 R743 R751 R752 R753 R754 R755 R756 å R757 R758 R759 R761 R763 R764 R765 R766 R767 R769 Part No.
PAGE 43
32SF670 Ref. No. R943 R944 R945 R946 R947 R948 R949 R950 R951 R952 R953 R954 R955 R957 R958 R959 R960 R961 R962 R963 R964 R965 R967 R968 R970 R971 R972 R973 R974 R975 R1092 R1101 R1102 R1103 R1104 R1105 R1106 R1112 R1113 R1114 R1115 R1116 R1118 R1119 R1120 R1121 R1122 R1123 R1124 R1125 R1128 R1131 R1132 R1136 R1137 R1143 R1144 R1145 R1150 R2101 R2102 R2103 R2104 R2105 R2106 R2107 R2201 R2202 R2203 R2401 R2402 R2403 R2404 R2501 R2502 R2503 Part No.
PAGE 44
32SF670 Ref. No. HM632 HM634 HM635 HM636 å HM673 HM701 HM702 HM706 HM707 HM714 HM715 å HM716 å HM717 HM733 å HM734 J905 J921 P361 P401 å P601 P621 P651 P702 P703 P1301 P2003 P2401 å PR701 å RDA303 å RDA501 RDA601 RDA671 å RDA701 å RY701 å SG701 N N N N N N N N N N N å å ★ Part No.
PAGE 45
32SF670 Ref. No. SC850 N N N N N N ★ Part No. QSOCV1011CEZZ CRDAR0248WE37 CRDAR5072WE86 CRDAR5072WE87 LX-BZ3100CEF7 LX-BZ3100CEF7 LX-BZ3100CEF7 J X X X J J J Description Socket 12pin Screw Screw Screw Code Ref. No.
PAGE 46
32SF670 Ref. No. Part No. ★ Description Code Ref. No.
PAGE 47
32SF670 PACKING OF THE SET S4 X1 X2 S3 S2 FRONT S1 Use tape to fix the top side of packing case. REAR Use 12 staples to fix the bottom side of packing case.
PAGE 48
32SF670 COPYRIGHT © 2007 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. TQ2170-S Apr. 2007 Printed in Japan SA.