Samsung CL21B501HL User manual

SERVICE
Manual
COLOR TELEVISION
Chassis: KSCB(N)_CB5H
Model : CL21B501HLMXZS
COLOR TELEVISION CONTENTS
1. Precaution
2. Product Specification
3. Disassembly & Reassembly
4. Troubleshooting
5. Exploded View & Part List
6. Wiring Diagram
7. Schematic Diagram
Refer to the service manual in the GSPN (see the rear cover) for the more information.
CL21B501HL

Troubleshooting
4-14 Samsung Electronics
4-2 Adjustment
4-2-1 Service Instruction
1.GeneralAdjustment:
In general, a color TV can provide ideal visual quality by adjusting the basic settings such as the vertical size, horizontal size,
focus, etc.
Display a black and white picture on the screen to check if the picture is clearly displayed.
Iftherearesome‘spotted’pointsonthescreenwhendisplayingablackandwhitepicture,degaussthescreenusingthe
degauss coil. If the spotted points remain, re-adjust the purity and the convergence.
Thiscompletesthebasicperformanceexamination.

Troubleshooting
Samsung Electronics 4-15
4-2-2 How to Access Service Mode
1. To enter Service Mode, press the keys on the remote control according to the following sequence. (in Stand-by status)
To Enter:
2. The initial screen of Service Mode.
3. Functions of the Keys within Service Mode.
MENU Show all menus
▲ /▼ Move the cursor to select an item.
◀/▶
Adjust the selected configuration value
4. W/B Setting
No Item Data RequiredAdjustment
1 White Balance x:275±5y:275±5Y:45±3 White Balance (Standard Data)
x:265±5y:265±5Y:1.5±0.3
2 Screen Voltage Toshiba Pattern Same As KSCA Chassis
G2Adjust
Info Menu POWER ONMute
Option XX XX XX XX XX
Hotel Option
Deflection
Video Adjust 1
Video Adjust 2
Video Adjust 3
Video Adjust 4
YC Delay
Others
Bus Stop Off
CHECKSUM 0000
G2 Adjust
RESET
T-SIXPEANM-1000.0 2008/10/08

Troubleshooting
4-16 Samsung Electronics
4-2-3 Factory Data
1. Option
No Item Selection Initial Data
1Video mute 100msec~1000msec/Off 600msec
2System CL/CP/CT-N CL
3AV Jack 1RCA/2RCA/2RCA+DVD/1SCART 1RCA
4Sound Line Stereo / MONO MONO
5High Deviation ON/Off On
6Volume Curve Large/Small Large
7Initial Lang English/Spain/Portugal/France By Country
8LangGroup NTSC SA/Philippine NTSC SA
9Close Caption ON/Off On
10 ExtBandPass On/Off Off
11 V-Guard On/Off On
12 AV OUT SEL CVBS2/CVBS3 CVBS2
13 DNIe Jr On/Off Off
14
2. Hotel Option
No Item Selection Initial Data
1Hotel Mode On/Off Off
2Power On Band Air/STD Air
3Power On Channel 0~99 3
4Power on volume 0~100 10
5MaxVolume 0~100 100
6Pannel Button Lock On/Off Off
7Power On Source Off/TV/AV1/AV2/DVD Off
♦The underlined are items applied during the service adjustment. None of the others should be adjusted.

Troubleshooting
Samsung Electronics 4-17

Troubleshooting
4-18 Samsung Electronics
3. Deflection
No Item Data Initial value Remarks
1V Amp Adjust 30
2V Shift Adjust 39
3H EW Adjust 39
4H Shift Adjust 33
5V Linearity FIX 25
6V S-Correction FIX 29
7V Slope FIX 45
8V Scroll FIX 22
9V Zoom FIX 17 AV Horizontal Line/
V-AMP Margin
10 H Parabola Adjust 35
11 Upper Corner Adjust 45
12 Lower Corner Adjust 45
13 H Trapezium Adjust 30
14 Bow Adjust 28
15 Angle Adjust 25
4. Video Adjust 1
No Item Data Initial value Remarks
1RCutoff Adjust 32
2GCutoff FIX 32
3 B Cutoff Adjust 32
4RDrive Adjust 32
5GDrive FIX 32
6 B Drive Adjust 32
7 Sub Bright Adjust 10
8 Sub Contrast Adjust 15
9 Bluescreen Contrast Adjust 15
10 G2AdjustBright FIX 45 9TR
11 AKB Option FIX 0
12 Cathode Drive Level FIX 10 W/B adjust Margin

Troubleshooting
Samsung Electronics 4-19
5. Video Adjust 2
No Item Data Initial value Remarks
1 PAL/SECAM Sub Color FIX 10
2 NTSC Sub Color FIX 14
3 NTSC Sub Tint FIX 17
4YUVSubTintRF FIX 32
5 YUV Sub Tint AV FIX 35
6YUVSubTintRGB FIX 32
7 Soft Clipping Level FIX 0 9TR
8 Peak White Limit FIX 6 9TR
9 SECAM B-Y Offset FIX 1
10 Peaking CF0 & Delay Mode FIX 0
11 Sub Sharpness FIX 23
12 VideoDependentCoringRF FIX 3 Video S/N
13 Video Dependent Coring AV FIX 3
6. Video Adjust 3
No Item Data Initial value Remarks
1RFAGC Adjust 30 AGCVoltage
2IFAGCSpeed FIX 1
3 IF Demodulator FIX 38
4 Fast Filter IF PLL FIX 0
5RFFOA/FOB FIX 0 VCRRFoutput
6 AV FOA/FOB FIX 0
7RFPA/NTIdentSensitivit FIX 2
8 AV PA/NT Ident Sensitivit FIX 2

Troubleshooting
4-20 Samsung Electronics
7. Video Adjust 4
No Item Data Initial value Remarks
1 Bypass of Chroma Base Band FIX 0 0: active 1:
bypassed
2FixedBeamCurrent FIX 0
3FixedBeamCurrent1 FIX 0
4Forced Colour On FIX 0 0: off
1: on
5 Beam Current Limiting FIX 0
6 Chroma Trap Mode FIX 0
7 EHT Tracking Mode FIX 1 0: only on vertical
1: on vertical and EW
8ComponentRcutoff FIX 32 Scart W/B
9ComponentGcutoff FIX 32 Scart W/B
10 ComponentB cutoff FIX 32 Scart W/B
11 RGBBlankingMode FIX 1 Secam Blanking
12 Wide Blanking Front FIX 0
13 WideBlankingRear FIX 6
8. YC Delay
No Item Data Initial value Remarks
1 PAL Delay FIX 12
2 SECAM Delay FIX 12
3 NTSC Delay FIX 12
4 PAL AV Delay FIX 12
5 SECAM AV Delay FIX 12
6 NTSC AV Delay FIX 12

Troubleshooting
Samsung Electronics 4-21
9. Others
No Item Data Initial value Remarks
1Service Blanking FIX 0 0: off
1: on
2Black Area FIX 1
3Black Stretch FIX 2
0: not active
1:active-15IRE
2:active-30IRE
4Blue Stretch FIX 0
5NoRedReduction FIX 1
6OSD Brightness FIX 15
7PWL Active FIX 1 0: not active
1: active
8Bypass Peaking Delay FIX 0 0: normai operation
1:peaking delay bypassed
9RatioPre&AfterShoot FIX 2
10 Ratioposi&NegaPeaks FIX 2
11 Dynamic Skin FIX 0 0 : 123 degree
1: 117 degree
12 Gamma&WhiteStretch FIX 1 0~3
13 DCTransferRatio FIX 1 0: No black level shift
1: black level shift
14 NTSCMatrix FIX 0 0:Japanesematrix
1:USAmatrix
15 DCXO Cap FIX 2 0~3

Troubleshooting
4-22 Samsung Electronics
4-2-4 Service Adjustment
1. Adjusting the Picture Size
Since the KSBA chassis includes a deflection adjustment of the Factory Data, adjustments must be performed according to the
following procedures when replacing the Main Board.
1 Display the Lion pattern.
2. Press “Power Off
→ Mute → 1 → 8 → 2 → Power On” using the remote control and enter Factory Mode.
3. Enter Deflection Mode.
4. Adjust the V-AMP, V-SHIFT, H-EW and H-SHIFT items so that the width becomes 92 and the height becomes 92.

Troubleshooting
Samsung Electronics 4-23
2. Adjusting the Picture Straight Lines
1. Display the Cross Hatch pattern.
2 Adjust settings other than V-AMP, V-SHIFT, H-EW and H-SHIFT so that straight lines are displayed without curves.
7. When the adjustments are complete, display the Lion pattern and check that the picture size has not been changed. If there is no
change, finish the adjustments.
3. Adjust BOW and the Angle settings so that the center line
becomes a straight line.
5. Adjust the Upper Corner and the Low Corner settings so
thatthe end of the lines become straight.
4. Adjust the H-Parabola and H-Trapezium settings so thatthe
left and right lines become straight.
6. Adjust the V-Linearity and V-SC settings so that the intervals
of the horizontal lines become uniform.

Troubleshooting
4-24 Samsung Electronics
4-2-5 Replacements & Calibration
No Item Data Remark
1 Main B/D Adjust Tilt, Adjust Screen, Adjust Focus, Adjust Factory Data, Adjust W/B Toshiba Mode
2 Power B/D - Toshiba Mode
3CRTAssy - -
4 FBT Adjust Screen, Adjust Focus Toshiba Mode
5 SUB - -
■ Adjusting the Focus
YoumustadjustthesettingsinthefollowingorderfortheKSCBchassiswhenreplacingtheCRTPCB,FBT,orCRT.
1. Display the Cross Hatch pattern.
2. Set the Screen Adjustment to “OK”.
3. TurntheFocusVRsothatthehorizontalandverticallinesareclearlydisplayed.
4.ChecktheFocusfortheentirescreenandadjusttheFocusVRifnecessary.
■ Adjusting the Screen Voltage
1. Select:
2. Initialize all settings to the values appropriate to the corresponding model make sure the video adjust 1 is the factory date,just as
the following picture.
Focus VR
MUTE 1 POWER ON 8 2
Power OFF

Troubleshooting
Samsung Electronics 4-25
3. Select:Mute,andgetintotheG2adjustToshibapattern.
4. FirstcheckIBRMin“G2Adjust”ofFactoryandadjustScreenVRuntil“ScreenAdjust:OK” like the picture.
■ Adjusting the White Balance
1. Select:
2. Initialize all settings to the values appropriate to the corresponding model.
3. Display the Toshiba pattern and adjust the White Balance using CA100 with the coordinates of the corresponding model.
Screen VR
[CA100]
Info Menu POWER ONMutePower OFF

Troubleshooting
4-26 Samsung Electronics
4. Enter Video Adjust1 of Service Mode. Adjust Low/Light.
- Adjust Sub Bright to set Y.
- Adjust B Cutoff to set y.
- AdjustRCutofftosetx.
5. Enter Video Adjust1 of Service Mode. Adjust High/Light.
- Adjust Sub Contrast to set Y.
- Adjust B Drive to set y.
- AdjustRDrivetosetx.
6. Check Low/Light and readjust it if its value has been changed.
7. If you have readjusted Low/Light, readjust High/Light until the two values are identical to the coordinates of the corresponding
model.
※ White Balance Standard Data
No Item Data RequiredAdjustment
1White Balance x:275±5y:275±5Y:45±3 White Balance (Standard Data)
x:265±5y:265±5Y:1.5±0.3
■ Check List for the Screen Voltage and White Balance Adjustment
1. The Screen Voltage and White Balance are connected to each other, and both of them have to be configured to the correct
values.
2. Adjust the White Balance after the Screen Voltage was adjusted, and check if the Screen Voltage is normal after adjusting the
White Balance.
3. If the White Balance is readjusted, check the Screen Voltage again.
4. When the adjustment is finished, check the following checklist.
- If there is a spot on the screen when turning the TV set off/on, adjust the Screen Voltage again.
- If there is a ghost line on the screen, adjust the Screen Voltage again.

MEMO
Samsung Electronics 4-27

Schematic Diagram
Samsung Electronics 7-1
7. Schematic Diagram
7-1 Circuit Description
7-1-1 Overall Block Description
KTA1505Y
IC801S
W6753F
A+14V
A+6.5V
A+12V
IC601
Sound AMP
IC301
Vertical Drive
AMP
T444S
Fly back Transformer
78R05
R3
VDN
VDP
LSL-OUT
LSR-OUT
SIDE-A/V (Option)
JACK
AV IN

Schematic Diagram
7-2 Samsung Electronics
7-1-2 Power Signal

Schematic Diagram
Samsung Electronics 7-3
7-1-3 Partial Block Diagram
1. Main Block Description
KTA1505Y
IC801S
W6753F
A+14V
A+6.5V
A+12V
IC601
Sound AMP
IC301
Vertical Drive
AMP
T444S
Fly back Transformer
78R05
R3
VDN
VDP
LSL-OUT
LSR-OUT
SIDE-A/V (Option)
JACK
AV IN

MEMO
7-4 Samsung Electronics

Schematic Diagram
Samsung Electronics 7-5
7-2 Schematic Diagram
7-2-1 Main Board
This Document can not be used without Samsung’s authorization.
Power
Video
Audio