21V-R70M SERVICE MANUAL TVSM045-21V-R70M COLOR TELEVISION Chassis No. GA-4M MODEL 21V-R70M 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 .......................................
1V-R70M IMPORTANT SERVICE SAFETY PRECAUTION Service work should be performed only by qualified service technicians who are thoroughly familiar will 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.
21V-R70M IMPORTANT SERVICE SAFETY PRECAUTION (Continued) BEFORE RETURNING THE RECEIVER 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.
21V-R70M LOCATION OF USER'S CONTROL Front Panel Menu/Preset REMOTE CONTROL VOLUME Up / Down CHANNEL Up / Down (Power On) POWER Standby MAIN E Note: Appearance design may vary depending on models ; Basic Remote Control Functions REMOTE CONTROL Infrared Transmitter Window POWER Press ON. Press again OFF. REMOTE KEYPAD Accesses any channel from keypad. FLASHBACK Returns to previous channel. VOLUME UP / DOWN (+ ) Increases sound. (- ) Decreases sound. In menu mode, changes or selects the TV adjustments.
21V-R70M Note: INSTALLATION AND SERVICE INSTRUCTIONS (1) When performing any adjustments to resistor controls and transformers, use non-mettalic screw drivers 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 3.15A fuse (F701), mounted on PWB-A, wired into one side of the A C line input.
21V-R70M Service Mode Overview 1. 2. 3. 4. 5. SERVICE MODE Service mode is entered by SERVICE key input or CH-UP +VOL-DOWN input during reset. Service mode is cleared by entering SERVICE key command during service mode. If key input port (SERVICE) input is LOW, then it is in service mode. During key input port (SERVICE) input is LOW, clearing service mode by key input SERVICE is disabled.
21V-R70M Adjustment Mode Items No.
21V-R70M SELF ADJUSTMENT H-VCO 1. 2. 3. 4. 5. 6. 7. When there is H-VCO self-adjustment key input for adjustment item H-VCO, self-adjustment is performed. H-FREE(1chip) is set to 1. H-OUT is set by intelligent monitor output. IM input is set as TIM input. H-VCO(1chip) data is changed so that the number of input pulse is 125 inside 8ms interval. When adjustment completed, OSD display and H-VCO self-adjustment status data of EEPROM are updated.
21V-R70M Setting Mode Items No.
21V-R70M Setting Mode Items (Continued) No.
21V-R70M Option Mode Items No 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 OPTION FUNCTION DEMO DOWNLOAD V-CHIP SPEAKER FAO P.
21V-R70M ADJUSTMENT METHOD Caution: to get into the service mode, one of the ways is press direct key for service items.
21V-R70M Second Stage Data Service Mode F01 VIDEO TONE -GAIN (TV) F02 VIDEO TONE -GAIN (AV) F03 VIDEO TONE -GAIN (S-AV) F04 VIDEO TONE -GAIN(YUV) F05 ABCL F06 BS F07 ABCL-G F08 SHP-AV F09 SHP-SAV F10 SHP-YUV F11 RGB-CLIP F12 E-SAVE F13 FAO-VOL F14 PIF-G F15 Y-DELAY(TV) F16 Y-DELAY(AV) F17 Y-DELAY(SAV) F18 Y-DELAY(YUV) F19 TINT-AV F20 TINT-SAV F21 COL-AV F22 COL-SAV F23 R-DRI(R2) F24 R-DRI( R) F25 R-DRI(B) F26 B-DRI(R2) F27 B-DRI( R) F28 B-DRI(B) F29 V-FREE F30 GAMMA F31 TRAP(TV) F32 TRAP(AV) F33 H-FREE F34
21V-R70M Second Stage (Continued) Data F57 F58 F59 F60 F61 F62 F63 F64 F65 F66 F67 F68 F69 F70 Service Mode CP CC LEVEL OSD POS OFFSET-ADJ-COL OFFSET-ADJ-TINT OFFSET-ADJ-TINT-YUV TIMER4-LOW SPEED TIMER4-HIGH SPEED R-CUT-YUV G-CUT-YUV B-CUT-YUV R-DRI-YUV B-DRI-YUV CLOCK-ADJ Third Stage Data OPTION FUNCTION 001 DEMO 002 DOWNLOAD 003 V-CHIP 004 SPEAKER 005 FAO 006 P.
ADJUSTMENT ITEM ADJUSTMENT POSITION ADJUSTMENT ITEM OPTION SET UP REFER AS BELOW STEP RANGE REFER AS BELOW ADJUSTMENT POSITION BUS SET UP REFER AS BELOW STEP RANGE CONTROL - CONTROL - PRE-ADJUST REQUIREMENT - PRE-ADJUST REQUIREMENT - CONTENT - CONTENT - INPUT CONDITION 21V-R70M INPUT CONDITION OUTPUT OSD CHECKING OUTPUT 21V-R70M 001 002 003 004 005 006 DEMO DOWNLOAD V-CHIP 1 0 0 SP 0 007 008 009 FAO P.
ADJUSTMENT ITEM ADJUSTMENT POSITION ADJUSTMENT ITEM H-POSITION V07 STEP RANGE 0-31 ADJUSTMENT POSITION V-SIZE V09 STEP RANGE 0~63 CONTROL I2C BUS CONTROL CONTROL I2C CONTROL PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP, CRT-PURITY PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP, CRT PURITY, V-PHASE, +B ADJUST CONTENT US 6 CH LION HEAD (MONOSCOPE) CONTENT US 6 CH LION HEAD INPUT CONDITION AC 230V, US MAGNETIC FIELD INPUT CONDITION AC 230V OUTPUT CONFIRMATION BY CRT SCREEN OUTP
ADJUSTMENT ITEM ADJUSTMENT POSITION ADJUSTMENT ITEM V-PHASE V06 STEP RANGE 0-7 ADJUSTMENT POSITION CLOSED CAPTION SET UP V18 STEP RANGE CONTROL I2C CONTROL CONTROL I2C CONTROL PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP, CRT-PURITY PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP CONTENT US 6 CH LION HEAD (MONOSCOPE PATTERN) CONTENT US 6 CH LION HEAD INPUT CONDITION 230V, RF INPUT, ZERO MAGNETIC FIELD INPUT CONDITION AC 230V OUTPUT CONFIRMATION ON CRT SCREEN OUTPUT CONFIRMATI
ADJUSTMENT ITEM ADJUSTMENT POSITION ADJUSTMENT ITEM H-VCO V21 STEP RANGE 0-7 ADJUSTMENT POSITION PIF-VCO V10 STEP RANGE 0~63 CONTROL I2C CONTROL CONTROL I2C CONTROL PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP CONTENT NO SIGNAL (RASTER) CONDITION CONTENT NO SIGNAL (RASTER) CONDITION INPUT CONDITION AC 230V INPUT CONDITION AC 230V OUTPUT IC 801 PIN 11 OUTPUT CONFIRMATION ON CRT DISPLAY (AUTO), IC801 PIN 2 VOLTAGE (MANUAL).
ADJUSTMENT ITEM ADJUSTMENT POSITION ADJUSTMENT ITEM RF-AGC V08 STEP RANGE 0-127 ADJUSTMENT POSITION SCREEN V11,V12,V13 STEP RANGE CONTROL I2C CONTROL CONTROL I2C CONTROL PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP CONTENT US10CH HALF COLOR BAR CONTENT WINDOW PATTERN OR US6 CH LION HEAD INPUT CONDITION RF INPUT FIELD STRENGTH 53dB uV (FIX) INPUT CONDITION 230V OUTPUT TUNER AGC TERMINAL (TP 201) OR CRT DISPLAY CONFIRMATION OUTPUT
ADJUSTMENT ITEM ADJUSTMENT ITEM WHITE BALANCE ADJUSTMENT V14,V15,V11,V12,V13 POSITION STEP RANGE 0-127, 0~255 SUB-BRIGHT ADJUSTMENT POSITION V04 STEP RANGE 0-255 CONTROL I2C BUS CONTROL CONTROL I2C CONTROL PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP, SCREEN PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP, SCREEN, WHITE BALANCE CONTENT 23CH 501RE WINDOW PATTERN INPUT CONDITION 230V OUTPUT CRT SCREEN DISPLAY.
ADJUSTMENT ITEM ADJUSTMENT ITEM SUB-PICTURE ADJUSTMENT POSITION V01 STEP RANGE 0-127 SUB-TINT ADJUSTMENT POSITION V02 STEP RANGE 0-127 CONTROL I2C BUS CONTROL CONTROL I2C CONTROL PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP, SCREEN, WHITE BALANCE, SUB-BRIGHTNESS PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC CONTENT WINDOW PATTERN CONTENT US 10 CH HALF COLOR BAR PATTERN INPUT CONDITION 230V INPUT CONDITION 230V OUTPUT CRT SCREEN DISPLAY.
ADJUSTMENT ITEM ADJUSTMENT ITEM SUB-COLOR ADJUSTMENT POSITION V03 STEP RANGE 0-127 X-RAY PROTECTION OPERATING CONFIRMATION ADJUSTMENT POSITION - STEP RANGE CONTROL I2C BUS CONTROL CONTROL PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC, SUB-PICT, SUB-TNT PRE-ADJUST REQUIREMENT AFTER ALL ADJUSTMENT FINISHED.
ADJUSTMENT ITEM HIGH VOLTAGE ADJUSTMENT POSITION - STEP RANGE CONTROL - - PRE-ADJUST REQUIREMENT AFTER ALL ADJUSTMENT FINISHED. CONTENT US 6 CH LION HEAD (MONOSCOPE PATTERN) INPUT CONDITION AC 230V, RF INPUT OUTPUTW CRT ANODE VOLTAGE SET THE USER CONTROL TO SHIPMENT SETTING POSITION. PUSH ON Y-MUTE BY R/C CONFIRM THE VOLTAGE OF CRT ANODE BY HIGH VOLTAGE METER AND MAKE SURE THE READING IS AS BELOW. HIGH VOLTAGE BELOW 28.
21V-R70M WAVEFORMS 24
21V-R70M CHASSIS LAYOUT H G DUNTKD373WE F PR701 E D C B A 1 2 3 4 25 5 6
21V-R70M CRT BLOCK DIA GRAM H G F E D C B A 1 2 3 4 26 5 6
21V-R70M MAIN BLOCK DIAGRAM J IC303 NC VOLUME I H C APC TV FSC 2 G AUDIO OUT AUDIO BYPASS EX AUDIO IN VIF VCO F VIF APC VIF AGC2 VIF AGC1 E D REAR FRONT IC3002 C B A 1 2 3 4 5 6 27 7 8 9 10
21V-R70M FILT HLF V-HOLD POW FR P MONO SAV L-VOL 10 11 12 13 14 15 28 16 17 18 19
21V-R70M DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: NOTES: 1. The unit of resistance "ohm" is omitted. (K=kW=1000W, M=MW) 2. All resistors are 1/16 watt, unless otherwise noted. 3. All capacitors are mF, unless otherwise noted. (P=pF=mmF) 4. (G) indicates ±2% tolerance may be used. 5. indicates line isolated ground. 1. Photographs taken on a standard gated color bar signal, the tint setting adjusted for proper color.
21V-R70M 1 C720 1u/50V 15K 22 0.0022 47 1 8500P R609 27 1/2 W 220 852 220u 25V 47u 0.56u 13K 100K 47K 22K 2.7 1.5 33K 5.
21V-R230S/21V-R70M/21V-R75M/21V-R80M 560P VB540ADAC1S1E 330P 220P
21V-R70M PRINTED WIRING BOARD ASSEMBLIES 483R G 283R H 429 C321 C312 R304 C304 C310 116 145 R825 R827 C311 C332 193R F 107RP QPWBFD373WJZZ C703 C702 407C 207R R706 347C R826 R662 R705 R706 R704 C709 R720 D707 D722 D709 D721 R706 D723 E D732 R722 R753 E R812 D715 B DUNTKD373WE D736 C710 204 606 417 R1007 911 R1894 D 607 C1015 R1014 908 R1055 909 R1076 R1058 R846 C451 C R837 609 601 605 720 123 R462 101 C383 R459 B PWB-A: MAIN Unit (Wiring Side) A 1
21V-R70M H RJ 1 4 RJ 1 5 B1 R432 R1 0 2 7 R1 0 2 4 RJ39 R1 0 0 9 R1 0 0 8 R1 0 0 6 RJ 1 7 RJ 1 6 C1 0 1 6 R1 0 0 3 R1056 F DC1 A1 R305 R314 I C3 0 0 2 R305 R315 R315 C313 C313 G R381 Q1 0 0 2 R383 Z1 R821 Q8 0 5 C3 0 8 R3 0 7 R3 0 3 R3 0 8 RJ 2 6 R1 8 5 0 R308 R8 3 1 Q1 0 7 3 R8 3 9 R1 8 9 5 R1 8 9 6 C8 4 5 R8 3 5 F C8 4 6 R8 2 8 R7 1 4 R1 0 8 1 R7 0 9 C8 0 4 F DC3 R8 0 2 Q7 0 2 D8 0 1 R8 4 3 D8 1 0 C8 3 9 R8 3 3 C8 4 7 C8 0 2 C8 0 8 Q7 0 1 C8 0 6
21V-R70M H G F E D C PWB-B: CRT Unit (Wiring Side) B A 1 2 3 4 35 5 6
21V-R70M REPLACEMENT PARTS LIST Ref. No. Part No. Description PWB-A: DUNTKD373WEA6 MAIN UNIT Replacement parts which have these special safety characteristics identified in this manual; electrical components having such features are identified by ! And shaded areas in the Replacement Parts TUNER NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS AN ASSEMBLY BUT NOT INDEPENDENTLY. ! TU201 VTUVT1Y5UF201 Tuner Lists and Schematic Diagrams.
21V-R70M Ref. No. Part No.
21V-R70M Ref. No. Part No. Description Ref. No.
21V-R70M Ref. No. Part No. Description Ref. No.
21V-R70M Ref. No. Part No. Ref. No. Description PWB-A: DUNTKD373WEA6 MAIN UNIT ! ! ! R1854 R1855 R1894 R1895 R1896 (Continued) VRS-CY1JF103J VRD-RA2BE122J VRD-RA2BE103J VRS-CY1JF473J VRS-CY1JF473J S1001 S1002 S1003 S1004 S1005 S701 SWITCHES QSW-K0003AJZZ QSW-K0003AJZZ QSW-K0003AJZZ QSW-K0003AJZZ QSW-K0003AJZZ QSW-P0612CEZZ F701 FH701 FH702 J405 P301 P601 P602 P603 P701 P702 P1001 P1002 RDA301 RDA501 RDA601 RDA602 RDA701 RMC1001 RY701 Part No.
21V-R70M Ref. No. Part No. Description Ref. No. MISCELLANEOUS PARTS ! QACCU0210PJZZ VSP9050PA02WA LBNDC0001PFZZ LHLDW1003PEZZ LHLDW1047PEZZ LHLDW1060PEZZ LHLDZ0063PEZZ QCNW-F275WJZZ QCNW-F276WJZZ QPGV-0410PJZZ TLABHA138WJZZ TLABMC610WJZZ TLABN0106PFZZ XTRSD60P35000 XWHSD75-15000 AC Cord Speaker Wire Holder Wire Holder Wire Holder Wire Holder H/V Holder "YBN" Wire "GBN" Wire Speaker Wire Bar Code Sticker Model Label Serial No.
21V-R70M PACKING OF THE SET H Infrared R/C Unit H Polystyrene Bag H Rod Antenna Operation Manual Guarantee Card Service List Batteries H Polyethylene Sack H Buffer Material H Packing Case FRONT REAR MARK H : Not replacement items. 42 Use tapes to fix the packing case.
I. NAKAMURA Noted M. GABIT Approved A. UGALDE Checked S. VERZOSA Prepared 1 Issue No.
