25VT-K100 25VT-CK10 SERVICE MANUAL S58Q325VTK100 TV/VCR COMBINATION Chassis No. VN-80 MODELS 25VT-K100 25VT-CK10 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 æ æ æ æ æ æ æ æ æ æ æ æ æ æ æ æ æ æ æ Page IMPORTANT SERVICE SAFETY PRECAUTION .....................................................................................
5VT-K100 25VT-CK10 IMPORTANT SERVICE SAFETY PRECAUTION Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and 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.
25VT-K100 25VT-CK10 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 check 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.
25VT-K100 25VT-CK10 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.
25VT-K100 25VT-CK10 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.
25VT-K100 25VT-CK10 ELECTRICAL SPECIFICATIONS TV SECTION POWER INPUT: POWER RATING: PICTURE SIZE Width: Height: Depth: CONVERGENCE: SWEEP DEFLECTION: FOCUS: INTERMEDIATE FREQUENCIES Picture IF Carrier Frequency: Sound IF Carrier Frequency: Color Sub-Carrier Frequency: AUDIO POWER OUTPUT RATING: SPEAKER Size: Voice Coil Impedance: VHF/UHF ANTENNA INPUT IMPEDANCE: TUNING RANGES VHF-Channels: UHF -Channels: CATV Channels: 120 V AC 60 Hz 110W 63.4cm 58.8cm 51.
25VT-K100 25VT-CK10 LOCATION OF USER'S CONTROL 7
25VT-K100 25VT-CK10 LOCATION OF USER'S CONTROL (Continued) Location Of Control’s Buttons (Remote Control) 8
25VT-K100 25VT-CK10 DISASSEMBLY AND REASSEMBLY 1. 2. 3. 4. Remove the 6 rear cover fixing screws and detach the rear cover. Take out the anode cap, CRT PWB, connectors K,M and RC, coating ground SP chip, fixing screws and others. Remove the 2 main PWB fixing screws and take out the main PWB unit and the VCR unit. Remove the 7 VCR fixing screws, and detach the shielding case.
25VT-K100 25VT-CK10 DISASSEMBLY AND REASSEMBLY (Continued) 5. Remove the 4 cassette housing control fixing screws, and detach the cassette housing control. 6. Remove the 4 mechanism chassis fixing screws, and detach the mechanism chassis PWB. 7. Remove the 8 main PWB fixing screws, and detach the main PWB.
25VT-K100 25VT-CK10 DISASSEMBLY AND REASSEMBLY (Continued) For servicing any of the components inside, disconnect the lead dressing holder. Position the main PWB unit upright as shown below and connect the leads for starting the services. Note: Fit the VCR unit into the front cabinet with the front flap door tilted at 70~80°.
25VT-K100 25VT-CK10 INSTALLATION AND SERVICE INSTRUCTIONS Notes: (1) When performing any adjustments to resistor controls and transformers use non-metallic screwdriver or TV alignment tools. (2) Before performing adjustment, 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.
25VT-K100 25VT-CK10 The SHARP TV/VCR COMBINATION have most of the analog setup adjustments eliminated. Coil and variable resistor adjustments are now performed digitally by using the remote transmitter or set’s volume and channel change function buttons. Note: There are still a few analog adjustments in the J-series such as 120V adjust, focus, master screen voltage and coils in the picture if/detector circuit. Follow the steps below whenever service adjustment is required.
25VT-K100 25VT-CK10 Table-A ADJUSTMENT ITEM PICTURE TINT COLOR BRIGHT SHARP V-PHASE H-PHASE RF-AGC V-AMP PIF-VCO R CUT-OFF G CUT -OFF B CUT-OFF G GAIN B GAIN MUTE BALANCE TEXT POSITION TEXT PICTURE CCD LEVEL OPTION DATA INTIAL VALUE RANGE 16 39 13 32 7 0 20 32 32 40 0 0 0 128 128 0 32 28 20 7 1 0~63 0~77 0~63 0~63 0~13 0~7 0~31 0~63 0~63 0~127 0~255 0~255 0~255 0~255 0~255 0~2 0~63 0~128 0~1 0~10 0~3 ADJUSTMENT COMMENTS "0"=Normal raster,"1"=no Y "2"=No Vertical *No adjustment is required due to prope
25VT-K100 25VT-CK10 SERVICE ADJUSTMENT White balance adjustment 1. Have unit receive a good local channel. 2. Enter the service mode. select service adjustment “COLOR” and set to “0” ( minimum color) . “COLOR” does not have to be adjusted if you selected a B/W picture or monoscope pattern. 3. Alternately adjust service adjustment data of “G GAIN” and “B GAIN” untill a good grey scale with normal whites is obtained. 4. Select service adjustment “COLOR”and adjust data to obtain normal color level.
25VT-K100 25VT-CK10 Vertical-size adjustment 1. Have unit receive a good local channel. 2. Enter the service mode and select service adjustment “V-AMP”. 3. While observing the top and bottom of the screen, adjust “V-AMP” data value to proper vertical size and linearity. Horizontal position adjustment 1. Have unit receive a good local channel. 2. Enter the service mode and select service adjustment “H-PHASE”. 3. Adjust “H-PHASE” data value so that picture is centered.
Check D701 thru D704, L701, R701 and F701. NO 17 Check T701, and adjacent parts. YES Does pulse waveform exist at line between (2) and (3) of IC701 ? YES Is 16V DC applied to pin (4) of IC701 ? YES Is 170V DC applied to C705? YES YES Is 120V AC applied to line between (H) and (C) of P702 ? Is AC cord connected? Set not operating NO NO NO NO Check IC701 and adjacent parts Check R708 and IC701. AC cord broken. Connect AC cord. FLOW CHART NO.
YES NO Is there a signal at pin (37) of IC401 ? NO 18 Abnormal Check the IC401. Normal Check the Tuner circuit. Check the Tuner AGC. Normal Check IC2001. Abnormal NO Check the Q431 and adjacent parts. Check the tuner bias. Check the IC401 and adjacent parts. YES Is there a signal at pin (43) of IC401 ? Check the IC401 and adjacent parts YES Is there a signal at pin (41) of IC401 ? noise increases but no signal is received Check the IC401, and adjacent parts. Check the IC401.
Check D725, R327, C725, C726, FB726 Check IC401 and adjacent parts NO 19 YES Check IC401 and adjacent parts as same as "NO PICTURE". Is there a signal at pin (39) of IC401 ? NO NO PLAYBACK PICTURE Check IC351 and adjacent parts. YES YES NO Does approx. 11V appear at pin (3) of IC351 ? YES Does waveform appear at pin (8) of IC351 ? NO Does waveform appear at pin (54) of IC401 ? NO SOUND Check the VCR: TROUBLESHOOTI NG "NO PLAYBACK". FLOW CHART NO.2-6 Check IC401, and adjacent parts.
25VT-K100 25VT-CK10 CHASSIS LAYOUT H PWB-B CRT UNIT G PWB-D VCR KEY UNIT F E PWB-E POWER SW UNIT PWB-F SENSOR UNIT D PWB-C SUB POWER UNIT (25VT-CJ100.
25VT-K100 25VT-CK10 MODEL:25VT-K100 H PWB-A MAIN UNIT G F E D C B A 1 2 3 4 21 5 6
25VT-K100 25VT-CK10 MODEL:25VT-CK10 H PWB-A MAIN UNIT G F E D C B A 1 2 3 4 22 5 6
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 MODEL 25VT-K100 BLOCK DIAGRAM OF TV SECTION H G F E D C B A 1 2 3 4 23 5 6 7 8 9 10 24 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 MODEL 25VT-CK10 BLOCK DIAGRAM OF TV SECTION H G F E D C B A 1 2 3 25 4 5 6 7 8 9 10 26 11 12
VT-K100 25VT-CK10 25VT-K100 25VT-CK10 MODEL 25VT-K100 OVERALL SCHEMATIC DIAGRAM H G F E D C B A 1 2 3 4 27 5 6 7 8 9 10 28 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 MODEL 25VT-CK10 OVERALL SCHEMATIC DIAGRAM H G F E D C B A 1 2 3 29 4 5 6 7 8 9 10 30 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 DESCRIPTION OF SCHEMATIC DIAGRAM H G NOTES: 1. The unit of resistance "ohm" is omitted (K:1000 ohms, M:1 Meg ohm). 2. All resistors are 1/8 watt, unless otherwise noted. 3. All capacitors are µF, unless otherwise noted P: µµF. 4. (G) indicates ±2% tolerance may be used. VOLTAGE MEASUREMENT CONDITIONS: 1.
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 MODEL 25VT-K100 SCHEMATIC DIAGRAM : MAIN Unit (TV Section) H G F E D C B A 1 2 3 33 4 5 6 7 8 9 10 34 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 H G F E D C B A 1 2 3 4 35 5 6 7 8 9 10 36 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 MODEL 25VT-CK10 SCHEMATIC DIAGRAM : MAIN Unit (TV Section) H G F E D C B A 1 2 3 37 4 5 6 7 8 9 10 38 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 H G F E D C B A 1 2 3 4 39 5 6 7 8 9 10 40 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 SCHEMATIC DIAGRAM : MAIN, SENSOR Unit (VCR Section) H G F E D C B A 1 2 3 41 4 5 6 7 8 9 10 42 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 SCHEMATIC DIAGRAM : MAIN Unit (VCR Section) H G F E D C B A 1 2 3 4 43 5 6 7 8 9 10 44 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 PRINTED WIRING BOARD ASSEMBLIES H G F E D C B A PWB-A: MAIN Unit (Wiring Side) 1 2 3 45 4 5 6 7 8 9 10 46 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 H G F E D C B A PWB-A: MAIN Unit (Chip Parts Side) 1 2 3 4 47 5 6 7 8 9 10 48 11 12
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 H G F PWB-B: CRT Unit (Wiring Side) PWB-F: SENSOR Unit (Wiring Side) E D C B PWB-E: POWER SW Unit (Wiring Side) PWB-D: VCR KEY Unit (Wiring Side Side) PWB-C: SUB POWER Unit (Wiring Side) (25VT-CK10.
25VT-K100 25VT-CK10 Ref. No. ★ Part No. Description REPLACEMENT PARTS LIST Code Ref. No. ★ Part No. Description Code LISTE DES PIECES CHANGE DES PIECES Les pi`eces de rechange qui pr élelesentent ces caract éleristiques sp éleciales de s élecurit éle, sont identifi élees dans ce manuel : les pi`eces élelectriques qui pr élesentent ces particularit éles, sont rep éler élee par la marque å et sont hachur élees dans les listes de pi`eces et dans les diagrammes sch élematiques.
25VT-K100 25VT-CK10 Ref. No. ★ Part No. Description Code Ref. No.
25VT-K100 25VT-CK10 Ref. No. ★ Part No. Description Code Ref. No.
25VT-K100 25VT-CK10 Ref. No. Part No. ★ Description Code Ref. No.
25VT-K100 25VT-CK10 Ref. No. Part No. ★ Description Code Ref. No.
25VT-K100 25VT-CK10 Ref. No. Part No. ★ Description Code Ref. No. PWB-A DUNTK9523WEV0/V1 MAIN UNIT (Continued) RESISTORS RJ6 RJ7 RJ8 RJ9 RJ14 RJ17 RJ19 RJ23 RJ25 RJ27 RJ28 RJ29 RJ30 RJ31 RJ33 RJ41 RJ44 RJ46 RJ47 RJ52 RJ53 RJ54 RJ55 RJ59 RJ60 RJ62 RJ67 RJ68 RJ71 RJ72 RJ73 RJ76 RJ78 RJ85 RJ87 R54 R55 R56 R57 R201 R202 R203 R204 R205 R206 R207 R208 R301 R302 R303 R305 R306 M-OX...Metal Oxide,M-Film...Metal Film VRS-CY1JF000J J 00 1/16W M-Ox. VRS-CY1JF000J J 00 1/16W M-Ox. VRS-CY1JF000J J 00 1/16W M-Ox.
25VT-K100 25VT-CK10 Ref. No. Part No. ★ Description Code Ref. No.
25VT-K100 25VT-CK10 Ref. No. Part No. ★ Description Code Ref. No.
25VT-K100 25VT-CK10 Ref. No. Part No. ★ Description Code Ref. No.
25VT-K100 25VT-CK10 Ref. No. Part No. ★ Description Code Ref. No.
25VT-K100 25VT-CK10 Ref. No. ★ Part No. Description Code Ref. No. ★ Part No. Description PWB-C DUNTK9162WEV3 PWB-E DUNTK9055WEV9 SUB POWER UNIT (For 25VT-CK10) POWER SW UNIT DIODE å VA1701 or or RESISTORS RH-VX0026CEZZ J Varistor RH-VX0019CEZZ RH-VX0041CEZZ AC R2502 VRD-RA2BE103J R2503 VRD-RA2BE223J R2504 VRD-RA2BE563J COILS å L1701 RCiLF0040PEZZ RCiLF0040PEZZ å L1702 AL AL RC-FZ017SCEZZ J 0.
25VT-K100 25VT-CK10 Ref. No. Part No. ★ Description Part No.
25VT-K100 25VT-CK10 Part No. ★ Description Code Ref. No. MECHANISM CHASSIS PARTS Ref. No. ★ Part No.
25VT-K100 25VT-CK10 Ref. No. Part No. ★ Description Code Ref. No. SCREW, NUT AND WASHERS 200 201 202 LX-XZ3030GEFD XBPSD26P08000 LX-HZ3082GEZZ 203 XBPSD26P06000 204 XBPSD30P05J00 205 XHPSD26P06WS0 206 XHPSD26P08WS0 207 XHPSD30P08WS0 208 209 210 211 212 213 214 XRESJ40-06000 XWHJZ52-05095 XWHJZ52-03095 XWHJZ52-04095 XWHJZ52-06095 XWHJZ52-07095 PSPAP0009AJZZ 215 216 217 218 LX-WZ1003GE00 LX-WZ1041GE00 LX-WZ1073GE00 XBPSD30P08J00 J Screw J Screw J Audio/Control Head Screw J Screw, C2.
25VT-K100 25VT-CK10 Part No. ★ Description Code Ref. No. Part No. CASSETTE HOUSING CONTROL PARTS Ref. No.
25VT-K100 25VT-CK10 Ref. No. Part No.
25VT-K100 25VT-CK10 25VT-K100 25VT-CK10 CABINET AND MECHANICAL PARTS H G F E D C B A 1 2 3 4 67 5 6 7 8 9 10 68 11 12
25VT-K100 25VT-CK10 Ref. No. H G Part No. ★ Description Code Part No. ★ Description Code PACKING PARTS SUPLLIED ACSESSORIES RRMCG1330PESA R Infrared R/C Unit TGAN-1006MEZZ M Guarantee Card (25VT-K100) TiNS-6348MEZZ M Operation Manual (25VT-K100) TCAUH3025MEZZ M Safety Tip (25VT-K100) TiNS-6349MEZZ M Operation Manual (25VT-CK10) Ref. No.
25VT-K100 25VT-CK10 Memo 71
25VT-K100 25VT-CK10 TQ0452-S YO.
