Table of Contents
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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 MODE ................................................................................................................................... 6
» ADJUSTMENT METHOD ..................................................................................................................... 7
» CHASSIS LAYOUT ............................................................................................................................. 11
» BLOCK DIAGRAM .............................................................................................................................. 12
» DESCRIPTION OF SCHEMATIC DIAGRAM ...................................................................................... 17
» WAVEFORMS ..................................................................................................................................... 18
» SCHEMATIC DIAGRAMS ................................................................................................................... 19
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 24
» REPLACEMENT PARTS LIST ............................................................................................................ 27
» PACKING OF THE SET ...................................................................................................................... 34
POWER INPUT ..................................................... AC 120 V, 60 Hz
POWER RATING .................................................................... 90W
PICTURE SIZE .......................................... 1,239 cm
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ................................................................................. Uni-Bi
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 ........................................ 2.5 W(RMS) x 2pcs
TOSHIBA CORPORATION
(DRAFT)
SERVICE MANUAL
MODELS
CONTENTS
ELECTRICAL SPECIFICATIONS
SPEAKER
2
(192sq inch)
ANTENNA INPUT IMPEDANCE
TUNING RANGES
(Nominal)
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
COLOR TELEVISION
21ARF45
SIZE ................................................................... 5 x 12 cm, 2pcs
VOICE COIL IMPEDANCE ............................ 16 ohm at 400 Hz
VHF/UHF ..................................................... 75 ohm Unbalanced
VHF-Channels ............................................................... 2 thru 13
UHF-Channels ............................................................ 14 thru 69
CATV Channels ........................................................... 1 thru 125
Specifications are subject to change without
prior notice.
21ARF45
Page
(EIA, Channel Plan U.S.A.)
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Summary of Contents for Toshiba 21ARF45
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Page 1: Table Of Contents
21ARF45 (DRAFT) SERVICE MANUAL COLOR TELEVISION 21ARF45 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
21ARF45 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 1. -
Page 3: Safety Notice
21ARF45 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 (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: Installation And Service Instructions
21ARF45 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... -
Page 5: Service Mode
21ARF45 SERVICE MODE Service Mode Overview 1. Service mode is entered by SERVICE key input or CH-UP +VOL-DOWN input during reset. 2. Service mode is cleared by entering SERVICE key or CH-UP +VOL-DOWN key command during service mode. 3. If key input port (SERVICE) input is LOW, then it is in service mode. -
Page 6: Adjustment Method
21ARF45 ADJUSTMENT METHOD Adjustment Mode Items Caution: to get into the service mode, one of the ways is press direct key for service items. the other ways is short the main chassis JA309 and JA402 There is three stage of Service Mode data... -
Page 7: Self Adjustment
21ARF45 Ë SELF ADJUSTMENT H-VCO 1. When there is H-VCO self-adjustment key input for adjustment item H-VCO, self-adjustment is performed. 2. H-FREE(1chip) is set to 1. 3. H-OUT is set by intelligent monitor output. 4. IM input is set as TIM input. - Page 8 21ARF45 Setting Mode Items Second Stage Item Name Register Range Default VideoTone-Gain (TV) 1chip V-TONE 0 / 1 VideoTone-Gain (AV) 1chip V-TONE 0 / 1 VideoTone-Gain(YUV) 1chip V-TONE 0 / 1 ABCL 1chip ABCL 0 / 1 1chip BS-OFF 0 / 1...
- Page 9 21ARF45 Option Mode Items Third Stage ITEM DEFAULT DEM0 Without DEMO With DEMO O02 DOWNLOAD Without V-CHIP OP With V-CHIP OP O03 V-CHIP Without V-CHIP With V-CHIP O04 SPEAKER Without SPEAKER With SPEAKER O05 FAO Without FAO With FAO O06 P.PREF Without P.PREF...
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Page 10: Chassis Layout
21ARF45 MODEL 21ARF45 CHASSIS LAYOUT... -
Page 11: Block Diagram
21ARF45 MODEL 21ARF45 BLOCK DIAGRAM: MAIN Unit... - Page 12 21ARF45...
- Page 13 21ARF45 MODEL 21ARF45 BLOCK DIAGRAM: MTS MODULE Unit...
- Page 14 21ARF45...
- Page 15 21ARF45 MODEL 21ARF45 BLOCK DIAGRAM: CRT Unit...
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Page 16: Description Of Schematic Diagram
21ARF45 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. signal, the tint setting adjusted for proper color. The (K=k =1000 , M=M Ω... -
Page 17: Waveforms
21ARF45 WAVEFORMS 1 1.024 Vp-p 2 5.69 Vp-p 3 5.69 Vp-p 4 5.84 Vp-p 5 2.00 Vp-p 6 2.08 Vp-p Horiz.Rate Horiz.Rate Horiz.Rate Horiz.Rate Vert.Rate Vert.Rate 7 6.56 Vp-p 8 6.40 Vp-p 9 4.88 Vp-p 0 158 Vp-p q 1140 Vp-p w 48 Vp-p Horiz.Rate... -
Page 18: Schematic Diagrams
21ARF45 SCHEMATIC DIAGRAM: CRT Unit... - Page 19 21ARF45 SCHEMATIC DIAGRAM: MAIN-1 Unit...
- Page 20 21ARF45...
- Page 21 21ARF45 SCHEMATIC DIAGRAM: MTS Unit...
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Page 22: Printed Wiring Board Assemblies
21ARF45 « Description Ref. No. Part No. Code PARTS LIST PWB-A: DUNTKC522WEA5 MAIN UNIT PARTS REPLACEMENT TUNER NOTE:THE PARTS HERE SHOWN ARE SUPPLIED AS AN Replacement parts which have these special safety characteristics identified in this manual; electrical components having such features... -
Page 23: Main Unit
21ARF45 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code C393 VCEA0A1EW108M+ X 1000 AD500539 PWB-A: DUNTKC522WEA5 C434 VCE9GA1CW106M+ X 10 AD500533 C435 VCE9GA1CW106M+ X 10 AD500533 MAIN UNIT C436 VCKYCY1EF104ZY X 0.1 Ceramic AD500292... - Page 24 21ARF45 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code RJ29 VRS-CY1JF000JY X 00 1/16W M-Ox. AD100552 PWB-A: DUNTKC522WEA5 RJ30 VRS-CY1JF000JY X 00 1/16W M-Ox. AD100552 RJ101 VRS-CY1JF000JY X 00 1/16W M-Ox. AD100552 MAIN UNIT...
- Page 25 21ARF45 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code R1024 VRS-CY1JF101JY X 100 1/16W M-Ox. AD500383 PWB-A: DUNTKC522WEA5 R1027 VRS-CY1JF104JY X 100k 1/16W M-Ox. AD500386 R1031 VRD-RA2BE101JY X 100 1/8W Carbon AD500335 MAIN UNIT...
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Page 26: Crt Unit
21ARF45 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code MISCELLANEOUS PARTS PWB-A: DUNTKC522WEA5 P860 QPLGN0461CEZZ X plug (4 PINS) AD500172 P880 QPLGN0561CEZZ X plug (5 pins) AD500173 MAIN UNIT SC851 QSOCV0933CEZZ X Socket (CRT) -
Page 27: Packing Parts
X caution card AD500523 QCNW-A871WJZZ X Wire (H) 5 pin AD500475 QCNW-A872WJZZ X Wire (K) 4 pin AD500476 QCNW-A873WJZZ X Wire (speaker) AD500477 QPLGA0017CEZZ X PLUG AC ADAPTOR AD500167 SUPPLIED ACCESSORIES RRMCG1589CESA X R/C GUN (TOSHIBA) AD500230 TINS-B801WJZZ X OPERATION MANUAL AD500524...