HISTORY INFORMATION FOR THE FOLLOWING MANUAL: BX-1S SERVICE MANUAL CHASSIS MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO. KV-21FS140 RM-YA005 LATIN NORTH SCC-S79A-A KV-21FS140 RM-YA005 LATIN SOUTH SCC-S79B-A ORIGINAL MANUAL ISSUE DATE: 2/2006 REVISION DATE SUBJECT 2/2006 No revisions or updates are applicable at this time. ®...
Page 2
Self Diagnosis Supported model BX-1S SERVICE MANUAL CHASSIS MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO. KV-21FS140 RM-YA005 LATIN NORTH SCC-S79A-A KV-21FS140 RM-YA005 LATIN SOUTH SCC-S79B-A KV-21FS140 RM-YA005 ® TRINITRON COLOR TELEVISION 9-965-997-01...
75-ohm external antenna terminal for VHF/UHF Picture tube ® FD Trinitron tube Visible screen size As an ENERGY STAR® Partner, Sony 20-inch picture measured diagonally Corporation has determined that this product meets the ENERGY STAR® guidelines for energy efficiency. ENERGY Actual screen size STAR®...
Replace these components with Sony parts whose part numbers appear as shown in this manual or in supplements published by Sony. Circuit adjustments that are critical for safe operation are identifi ed in this manual. Follow these procedures whenever critical components are replaced or improper operation is suspected.
KV-21FS140 SAFETY CHECK-OUT The AC leakage from any exposed metal part to earth ground and from After correcting the original service problem, perform the following all exposed metal parts to any exposed metal part having a return to safety checks before releasing the set to the customer: chassis, must not exceed 0.5 mA (500 microamperes).
KV-21FS140 Self Diagnosis SELF-DIAGNOSTIC FUNCTION Supported model The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED indicator will automatically begin to fl ash. The number of times the LED fl ashes translates to a probable source of the problem. A defi nition of the STANDBY LED fl ash indicators is listed in the instruction manual for the user’s knowledge and reference.
Page 8
KV-21FS140 To Bring Up Screen Test In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below: DISPLAY POWER Sound Volume - Channel 5 Note that this differs from entering the Service Mode (Sound Volume + ). The following screen will be displayed indicating the error count: SELF DIAGNOSTIC VSTOP...
KV-21FS140 1-3. SERVICE POSITION 1 Press on catch tab to release A Board. 2 Gently pull the A Board forward to access the CN200 connector (to speakers) 3 Disconnect the CN200 from the A Board. 4 Gently continuing pulling the A Board and rotate into service position. 5 Reconnect CN200.
KV-21FS140 1-4. PICTURE TUBE REMOVAL WARNING: BEFORE REMOVING THE ANODE CAP High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove the anode cap. Short between anode and CRT coated earth ground strap.
KV-21FS140 SECTION 2: SET-UP ADJUSTMENTS The following adjustments should be made when a complete realignment Perform the adjustments in order as follows: is required or a new picture tube is installed. Beam Landing Convergence These adjustments should be performed with rated power supply voltage Focus unless otherwise noted.
KV-21FS140 2-2. CONVERGENCE Horizontal Static Convergence Before starting convergence adjustments: If the blue dot does not converge with the red and green dots, use the 6 pole magnet to adjust as shown: Perform FOCUS, VLIN and VSIZE adjustments. Set BRIGHTNESS control to minimum. Set Picture mode to STANDARD.
KV-21FS140 Convergence Rough Adjustment Screen Corner Convergence Before performing this adjustment, perform Horizontal and Vertical Static Affi x a Piece A (90), Convergence Correct/Permaloy Assy Correction to Convergence Adjustment. the misconverged areas. Input cross hatch pattern. a) TLH Adjust the horizontal convergence of red and blue dots by inserting a-d : screen-corner misconvergence TLH Correction Plate to the DY pocket (left or right).
KV-21FS140 2-4. SCREEN (G2) Before beginning adustment procedure: -Set Picture and Brightness to “STANDARD”. -Set TV to Video mode. -Set WHBL 016 “RGBB” to 01 Connect R, G, B of the C/CV board cathode to oscilloscope. Adjust Brightness to obtain the cathode value to the value shown below: 165 ±...
KV-21FS140 SECTION 3: CIRCUIT ADJUSTMENTS Electrical Adjustments by Remote Commander Use the Remote Commander (RM-YA005) perform the circuit adjustments in this section. Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator 3-1. REMOTE ADJUSTMENT BUTTONS AND INDICATORS DISPLAY (Service Mode) MUTING...
KV-21FS140 3-2. ACCESSING THE SERVICE MENU MODE Use the remote commander to access the service meu mode and perform the following adjusments. Standby mode (Power off). Press the following buttons on the remote commander within a second of each other: DISPLAY POWER Sound Volume +...
KV-21FS140 3-3. CONFIRMING SERVICE ADJUSTMENT 10. Set “PWL” and “BLBG” back to initial data. (“PWL”: 01h and “BLBG”: 00h) CHANGES 11. Press MUTING then 0 to write into memory. After completing adjustments, pull out the plug from the AC outlet, then replace the plug in the AC outlet again.
KV-21FS140 12. For single system model with NTSC 4.43, select TV channel with PAL 50HZ NORMAL MODE NTSC 4.43 and repeat items (3) to (8) Input PAL signal 50Hz in the Service Mode. Set Wide Mode to “OFF”. VB3 VB4 Perform the below adjustments using the “General Setting”...
Page 32
KV-21FS140 ITEM INFORMATION No. OPB1 Item Speed Search Home Wide Theatre Screen KV-21FS140 SPEED SEARCH (Time of speed search) 00 = disabled (original cycle speed) 01 = 4 time speed from the original 10 = 6 time speed from the original 11 = 8 time speed from the original Home Theatre 1 = Home Theatre mode available...
Page 33
KV-21FS140 No. OPB3 Item Reserved NICAM NICAM A2 ST Thai US ST Korean MONO Bilingual KV-21FS140 Reserved Not used NICAM ST (NICAM Stereo) 0 = disabled, 1 = enabled NICAM BI (NICAM Bilingual) 0 = disabled, 1 = enabled A2 ST/BI (A2 [West German] Stereo/Bilingual) 0 = disabled, 1 = enabled...
Page 34
KV-21FS140 No. OPB5 Item Signal MSYS COSMIC Tilt Band Wide Booster Edge KV-21FS140 Signal Booster Signal Booster feature 0 = disabled, 1 = enabled MSYS ASD (ASD Improvement for 0 = disabled, 1 = enabled M System channels) *Only applicable when ASD = 1 COSMIC ASD Automatic Standard Detection 0 = disabled, 1 = enabled...
KV-21FS140 SECTION 4: DIAGRAMS 4-1. CIRCUIT BOARDS LOCATION The components identifi ed by shading and symbol are critical for safety. Replace only with part number specifi ed. The symbol indicates a fast operating fuse and is displayed on the component side of the board. Replace only with fuse of the same rating as marked.
KV-21FS140 4-3. BLOCK DIAGRAMS AND SCHEMATICS SIGNAL FLOW BLOCK DIAGRAM P OW E R S UP P LY , AUDIO, DE F LE C T ION, T U101 T UNE R , J AC K IC 001 S C L S C L S Y S T E M C ONT R OLLE R , V IDE O &...
KV-21FS140 4-4. SCHEMATICS AND SUPPORTING INFORMATION A BOARD SCHEMATIC DIAGRAM (1 OF 6) A BOARD WAVEFORMS TO A BOARD CN905 TO C BOARD 2.5 V p-p (V ) 5.4 V p-p (H) 3.2 V p-p (H) CN701 CN004 CN007 — C005 R377 C006...
KV-21FS140 C BOARD SCHEMATIC DIAGRAM C BOARD WAVEFORMS TO T801 1000V CN704 R795 100k 1.6V p-p (H) 1.2V p-p (H) 1.4V p-p (H) 1/2W J751 FPRD — C752 4700p R773 C754 1/2W 560k 250V 200V L780 R774 124.0 V p-p (H) 104.0 V p-p (H) 116.0V p-p (H) 22uH...
Page 45
KV-21FS140 [CRT DRIVE, RGB DRIVE] [CRT DRIVE, RGB DRIVE] COMPONENT SIDE CONDUCTOR SIDE J L 726 J L 728 J L 743 J L 707 J L 708 J L 729 J L 727 J L 701 R752 J L 725 R778 R713 C783...
KV-21FS140 SECTION 5: EXPLODED VIEWS Components not identifi ed by a part number or The component parts of an assembly are indicated by the Items marked with an asterisk are not stocked since description are not stocked because they are seldom reference numbers in the far right column of the parts list they are seldom required for routine service.
KV-21FS140 SECTION 6: ELECTRICAL PARTS LIST NOTE: The components identifi ed by shading RESISTORS mark are critical for safety. Replace only • All resistors are in ohms with part number specifi ed. • F : nonfl ammable • All variable and adjustable resistors have characteristic curve B, unless otherwise noted.
Page 50
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES C081 1-162-964-11 CERAMIC CHIP 0.001µF 10% C213 1-115-339-11 CERAMIC CHIP 0.1µF C082...
Page 51
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES C832 1-164-230-11 CERAMIC CHIP 220pF C625 1-127-943-51 CERAMIC 330pF 250V C833...
Page 52
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES C913 1-164-315-11 CERAMIC CHIP 470pF D064 8-719-036-94 DIODE RD5.6SB-T1 C914 1-164-315-11...
Page 53
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES D805 8-719-991-33 DIODE 1SS133T-77 FUSE HOLDER D807 8-719-991-33 DIODE 1SS133T-77 FH601...
Page 54
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES JR025 1-216-864-11 SHORT CHIP L042 1-469-555-21 INDUCTOR 10µH JR026 1-216-864-11 SHORT CHIP...
Page 55
KV-21FS140 REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES Q608 8-729-120-28 TRANSISTOR 2SC1623-L5L6 R059 1-216-821-11 METAL CHIP 1/10W Q609 8-729-120-28 TRANSISTOR 2SC1623-L5L6 R060 1-216-809-11 METAL CHIP 1/10W Q803 8-729-140-50 TRANSISTOR 2SC3209LK R061 1-216-819-11 METAL CHIP 1/10W Q804 6-550-362-01 TRANSISTOR...
Page 56
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES R234 1-249-401-11 CARBON 1/4W R395 1-216-845-11 METAL CHIP 100K 1/10W R235...
Page 57
KV-21FS140 REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES R826 1-247-891-00 CARBON 330K 1/4W R891 1-249-385-11 CARBON 1/4W R827 1-216-369-00 METAL OXIDE R893 1-218-871-11 METAL CHIP 0.50% 1/10W R828 1-243-606-71 METAL OXIDE R895 1-218-859-11 METAL CHIP 3.3K 0.50% 1/10W R829...
Page 58
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES R9017 1-216-809-11 METAL CHIP 1/10W R9018 1-216-809-11 METAL CHIP 1/10W R9019 1-216-809-11...
Page 60
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES C312 1-162-964-11 CERAMIC CHIP 0.001µF 10% C654 1-102-228-00 CERAMIC 470pF 500V...
Page 61
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES C854 1-126-948-11 ELECT 100µF C2648 1-126-952-11 ELECT 1000µF C855 1-107-894-11 ELECT...
Page 62
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES D202 8-719-404-50 DIODE MA111-TX D832 8-719-404-50 DIODE MA111-TX D203 8-719-404-50 DIODE...
Page 63
KV-21FS140 REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES IC607 8-759-832-05 BA18BC0FP-E2 JR600 1-216-864-11 SHORT CHIP IC801 6-703-708-01 LM2903DT JR601 1-216-864-11 SHORT CHIP IC802 6-701-937-01 TJM4558CDT JR602 1-216-864-11 SHORT CHIP IC804 6-708-756-01 STV9302B JR806 1-216-864-11 SHORT CHIP JR1006 1-216-864-11 SHORT CHIP...
Page 64
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES L805 1-408-947-00 INDUCTOR 2.2MH RESISTOR L902 1-414-187-11 INDUCTOR 47µH R001 1-216-829-11...
Page 65
KV-21FS140 REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES R109 1-216-021-00 RES-CHIP 1/10W R311 1-216-841-11 METAL CHIP 1/10W R115 1-216-809-11 METAL CHIP 1/10W R312 1-216-857-11 METAL CHIP 1/10W R116 1-216-809-11 METAL CHIP 1/10W R313 1-216-847-11 METAL CHIP 150K 1/10W R118...
Page 66
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES R424 1-218-899-11 METAL CHIP 150K 0.50% 1/16W R844 1-218-867-11 METAL CHIP 6.8K...
Page 67
KV-21FS140 NOTE: The components identifi ed by shading mark are critical for safety. Replace only with part number specifi ed. REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES R913 1-216-853-11 METAL CHIP 470K 1/10W R9031 1-216-809-11 METAL CHIP 1/10W R914...
Page 69
In an effort to reduce the size of this pdf fi le the tiled schematics are not attached to this Service Manual. To receive a complete set of the tiled schematics for this manual please submit a request to: Service_Promotion@am.sony.com.