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Self Diagnosis
Supported model
SERVICE MANUAL
MODEL NAME REMOTE COMMANDER DESTINATION
BA-4D CHASSIS
CHASSIS NO.
KV-20S90
RM-Y155
US
SCC-S27NA
Trinitron
KV-20S90
RM-Y155
TRINITRON® COLOR TELEVISION
9-965-905-01
KV-20S90 / 21SE43C
SECTION 4: CIRCUIT ADJUSTMENTS
ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER
Use the Remote Commander (RM-Y155) to perform the circuit adjustments in this section. Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator
4-1. SETTING THE SERVICE ADJUSTMENT MODE
1. Standby mode (Power off). 2. Press the following buttons on the remote commander within a second of each other: Channel 5 Sound Volumne + Power Display
4-2. MEMORY WRITE CONFIRMATION METHOD
1. After adjustment, pull out the plug from the AC outlet, then replace the plug in the AC outlet again. 2. Turn the power switch ON and set to Service Mode. 3. Call the adjusted items again to confirm they were adjusted.
SERVICE ADJUSTMENT MODE ON
1. The CRT displays the item being adjusted.
Mode Display Item HSIZ Item Data 0
4-3. REMOTE ADJUSTMENT BUTTONS AND INDICATORS
SERVICE
MUTING
(Enter into memory)
POWER
(Service Mode)
DISPLAY
2. Press 1 or 4 on the Remote Commander to select the item. 3. Press 3 or 6 on the Remote Commander to change the data. 4. Press MUTING then ENTER to write into memory. (Service Mode) 1 Disp. (Item up) 2 (Device Item Up) 4 Disp. (Item down) 8 (Initialize)
3 Item (Data up) 6 Item (Data down) 5 (Device item down)
SERVICE ADJUSTMENT MODE MEMORY
Mode MUTING SERVICE WRITE Green
ENTER
(Enter into memory) 0 (Remove from memory)
ENTER
Red
1. Press 8 then ENTER on the Remote Commander to initialize.
VOLUME (+)
(Service Mode)
Mode SERVICE RESET
Carry out Step 1 when adjusting IDs 0-7 and when replacing and adjusting IC003
RM-Y155
2. Turn set off then on to exit service adjustment mode.
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KV-20S90 / 21SE43C
ADJUSTMENT ITEMS (1 OF 2)
Reg # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 ITEM HSIZ HPOS VBOW VANG TRAP PAMP CPIN VSIZ VPOS VLIN SCOR VZOM EHT ASP SCRL HBLK LBLK RBLK VUSN HDW EWDC LVLN UVLN RDRV GDRV BDRV RCUT GCUT BCUT DCOL SHUE SCOL SBRT RON GON BON AXPL AXNT CBPF CTRP COFF KOFF SSHP SHPF PREL Y-DC GAMM VTH ABLM YDEL NCOL FUNCTION Horizontal Amp. Adjustment Horizontal Position Adjustment Vertical Line Bowing Adj. Vertical line Bowing Slant Adj. Horizontal Trapezoid Adj. Horizontal PIN Distortion Adj. SAME AS PAMP-SCRN TP/BTM Vertical Amp. Adjustment Vertical Position Adj. Vertical Linearity Adj. Vertical Amount Adj. Vertical Zooming Vertical High-Voltage Correction Aspect Ratio Control 16:9 CRT Z Mode Trans. Scroll RGB Out Width Control Left Screen HBLK Control RGT Screen HBLK Control V Saw Waveform Compress Horizontal Drive Pulse Width EW/ D.C. Adjustment Lower Screen BTM Vertical Line Adj. Upper Screen Top Vertical Line Adj. R Output Drive Control G Output Drive Control B Output Drive Control R Output Cutoff Control G Output Cutoff Control B Output Cutoff Control Dynamic Color On/Off Sub HUE Sub Color Sub BRIGHTNESS R Output On/Off G Output On/Off B Output On/Off Axis PAL Axis NTSC Chroma BPF On/Off Y TRAP FILTER On/Off Color On/Off Set Color Killer Sub SHARPNESS SHARPNESS Circuit Fo Pre-Shoot / Over-Shoot Switching Axis NTSC Chroma BPF On/Off Color On/Off ABL Control Mode Set Color Killer Sub Sharpness DATA RANGE 0-31 0-31 0-15 0-15 0-15 0-31 0-31 0-31 0-31 0-15 0-15 0,1 0-15 0-63 0-31 0,1 0-15 0-15 0,1 0,1 0,1 0-15 0-15 0-31 0-31 0-31 0-15 0-15 0-15 0,1 0-15 0-15 0-15 0,1 0,1 0,1 0,1 6.00 ± 0.8 0,1 6.00 ± 0.9 0,1 6.00 ± 0.8 0-15 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0-15 INITIAL DATA 31 21 6 6 15 31 31 43 35 7 7 0 15 47 31 1 15 3 0 1 0 0 0 30 24 21 10 7 7 0 15 14 7 1 1 1 0 0 1 0 0 0 9 1 1 1 0 1 1 7 1 VIDEO AVERAGE DATA 31 20 6 6 15 31 31 37 38 7 7 0 4 47 31 1 15 3 0 0 0 0 0 27 22 22 9 4 4 0 18 18 10 1 1 1 0 0 1 1 0 0 6 * 1 1 0 1 1 7 1
1
* = TV/VIDEO = 0
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KV-20S90 / 21SE43C
ADJUSTMENT ITEMS (2 OF 2)
Reg # 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 ITEM FSC K-ID HOSC VSS HSS HMSK VTMS CDMD AFC FIFR SBAS STRE SBAL DISP PADJ HCHM HCLM HCHS HCLS ID0 ID1 ID2 ID3 ID4 ID5 ID6 ID7 FUNCTION G Output On/Off B Output On/Off Horizontal VCO Oscillation Freq. Vertical Sync Slice Level Horizontal Sync Slice Level HMASK On/Off Select Signal VTIM Pin Vertical Count Down Mode Switching AFC Loop Gain Switching Field Frequency Sub Bass Sub Treble Sub Balance O.S.D Display Position POWER ADJUSTMENT H SYNCH SEP. LIMIT FOR TUNER H SYNCH SEP. LIMIT FOR TUNER H SYNCH SEP. LIMIT FOR VIDEO H SYNCH SEP. LIMIT FOR VIDEO DATA RANGE 0,1 0,1 0-15 0,1 0,1 0,1 0-3 0-3 0-3 0-3 0-15 0-15 0-15 0-127 0-63 0-127 0-127 0-127 0-127 0-255 0-255 0-255 0-255 0-255 0-255 0-255 0-255 INITIAL DATA 0 0 10 0 0 1 0 3 0 3 8 9 13 15 51 69 16 69 16 VIDEO AVERAGE DATA 1 0 7 0 0 1 0 ** * 3 8 9 13 5 42 69 16 69 16 SEE ID MAP SEE ID MAP SEE ID MAP SEE ID MAP SEE ID MAP SEE ID MAP SEE ID MAP SEE ID MAP
3 0
* = TV/VIDEO = 0 ** = TV = 0, VIDEO = 1
Mode Function
Notes: No. 1-78 show the order that each adjustment mode may be selected while in Service Mode. Data Range shows the range of possible setting for each Adjustment Mode. Initial Data shows the standard settings for each Adjustment Mode.
Data 25
SERVICE ID0
ID MAP
Model Destination KV-20S90 US KV-21SE43C E ID-0 25 17 ID-1 3 3 ID-2 1 1 ID-3 227 195 ID-4 3 115 ID-5 1 1 ID-6 0 0 ID-7 0 0
4-4. A BOARD ADJUSTMENTS H. FREQUENCY ADJUSTMENT
1. InputTV mode (RF) with no signal. 2. Set to Service Adjustment Mode. 3. Connect a frequency counter to base of Q501 (TP-500 H. DRIVE). 4. Check H. Frequency for 15735 ± 200 Hz. 5. Press MUTING then ENTER to save into the memory.
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KV-20S90 / 21SE43C
V. FREQUENCY CHECK
1. Select video 1 with no signal input. 2. Set the conditions for a standard setting. 3. Connect the frequency counter to TP-508 or CN501 pin 6 (V DY+) connector and ground. 4. Check that V. Frequency shows 60 ± 4 Hz.
DISPLAY POSITION ADJUSTMENT (DISP)
1. 2. 3. 4. 5. 6. Input a color-bar signal. Set to Service Adjustment Mode. Select DISP with 1 and 4 . Adjust values of DISP with 3 and 6 to adjust characters to the center. Write to memory by pressing MUTING then ENTER . Check to see if the text is displayed on the screen.
Mode SERVICE Display Item DISP Item Data 15
SUB CONTRAST ADJUSTMENT (RDRV)
1. Input a color-bar signal. 2. Set the red color on (1). 3. Set in Service Adjustment Mode. 4. Select the item DCOL level to 0. 5. Set the conditions as follows: PICTURE: MAX COLOR: MIN BRIGHT: CENTER R ON: ON (1) G ON: OFF (0) B ON: OFF (0)
SUB BRIGHT ADJUSTMENT (SBRT)
1. 2. 3. 4. 5. Input a crosshatch signal. Set to Service Adjustment Mode. Set the PICTURE and BRIGHTNESS to minimum. Select the SBRT item with 1 and 4 . Adjust the values of SBRT with 3 and 6 to obtain a faintly visible crosshatch. 6. Press MUTING then ENTER to save into the memory.
Mode
Display Item
1: ON 0: OFF 26
SERVICE
RON
6. Connect an oscilloscope probe to CN301 pin 2 (Red Out) and ground . 7. Select RDRV with 1 and 4 . 8. Adjust the value of RDRV with 3 and 6 for 1.50 ± 0.05 Vpp.
SUB HUE, SUB COLOR ADJUSTMENT (SHUE, SCOL)
1. 2. 3. 4. Input a color-bar signal. Set to Service Adjustment Mode. Connect a probe to TP47B B-OUT (C Board). Measure white V1 and blue V4. 4.1) Increase SCOL Register +1 setp.
White
1.50 ± 0.05 Vpp
V1
V2
V3
V4
Black
9. Reset the item DCOL to 1. 10. Press MUTING then ENTER to save into the memory. 11. Return the following back to normal after adjustment. PICTURE: COLOR: BRIGHT: R ON: G ON: B ON: MAX CENTER CENTER ON (1) OFF (1) OFF (1)
STANDARD |V4 - V1| = ± 0.2Vpp |V3 - V2| = ± 0.2Vpp
5. Press MUTING then ENTER to save into the memory.
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KV-20S90 / 21SE43C
V. SIZE ADJUSTMENT (VSIZ)
1. 2. 3. 4. 5. Input a crosshatch signal. Activate the Service Adjustment Mode. Select the VSIZ item with 1 and 4 . Adjust value of VPOS with 1 and 4 for the best vertical center. Press MUTING then ENTER to save into the memory.
SERVICE ADJUSTMENT MODE MEMORY
1. Change the value of the DCOL item to 1. 2. After completing all adjustments, press 0 then ENTER . Read From Memory
Mode SERVICE READ Green 0 Red ENTER
V. CENTER ADJUSTMENT (VPOS)
1. 2. 3. 4. 5. Input a crosshatch signal. Set to Service Adjustment Mode. Select the VPOS item with 1 and 4 . Adjust value of VPOS with 3 and 6 for the best vertical center. Press MUTING then ENTER to save into the memory.
H. CENTER ADJUSTMENT (HPOS)
Perform this adjustment after performing H. Frequency. 1. Input a crosshatch signal. 2. Set to Service Adjustment Mode. 3. Select the HPOS item with 1 and 4 . 4. Adjust the value of HPOS with 3 and 6 for the best horizontal center. 5. Press MUTING then ENTER to save into the memory.
V. LINEARITY (VLIN), V. CORRECTION
1. Input a crosshatch signal. 2. V.Correction is automatically adjusted from the circuit and should satisfy the conditions below.
V LINEARITY (VLIN)
V CORRECTION
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