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Alignment Procedure of M123A Color TV 

1. FLOWCHART OF ALIGNMENT PROCEDURE 

 
 
 
 
 
 
 
 

 
2 Adjustment of B+ voltage 

1)  Apply 120VAC(

±

5V) to mains power input, and Philips standard testing pattern 

to RF input. 
2)  Adjust VR830 in STANDARD mode until voltage at TP2 (B+) is 106V 

±

0.5V. 

3. RF AGC adjustment

 

Observe monitor the collector waveform of Q101 with the probe of Oscilloscope as 
illustration below. Select channel 2 (>70dB) from the antenna input. Enter D-mode, 
select menu6 to adjust RFAGC item until the monitor peak value to 0.8V

p-p

IN60

3Pf

输出

输入

 

4. Screen & Focus voltage adjustment

 

 Apply pattern signal in normal status, enter D

-mode, press “TV/AV” button to turn 

off the vertical output. 

 Adjust the SCRREEN switch on the flyback transformer to make a horizo

ntal 

shining line just visible on the screen. 

 Turn on the vertical output, adjust the “FOCUS” on the flyback transformer to 

obtain the optimum focus. 

5. White balance adjustment 

1)Apply the black and white pattern in normal status; 

2)Alignment of normal color temperature 

① 

Change Color Temperature to normal status   

② 

Use a color analyzer to measure the black side of the screen. By changing the 
value of RC, GC and BC, set the reading of the color analyzer to X=284, Y=299. 

B+ 

adjustment 

AGC 

Screen & Focus

adjustment 

White balance

adjustment 

Sub-brightness 

adjustment 

Pincushion correction &

Horizontal Amplitude

adjustment 

Center & Amplitude and

OSD adjustment 

INPUT 

OUTPUT

Summary of Contents for 21E12

Page 1: ...t Procedure 19 27 5 Block Diagram 28 28 6 Schematic Diagram 29 7 PCB Layout 30 33 8 Explode View Diagram 34 This manual is the latest at the time of printing and does not include the modification whic...

Page 2: ...e of uninsulated voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to the person The exclamation point within an equilateral triangle is...

Page 3: ...nnel 8 Do not subject your television set to impact of any kind Be particularly careful not to damage the picture tube surface 9 Unplug this television set from the wall outlet before cleaning Do not...

Page 4: ...porting structure grounding of the lead in wire to an antenna discharge unit size of grounding conductors location of antenna discharge unit connection to grounding electrode and requirements for the...

Page 5: ...21 If you are unable to restorenormal operation by following the detailedprocedurein your operating instructions do not attempt any further adjustment Unplug the set and call your dealer or service te...

Page 6: ...5 A 1 5A Tuning system 181 Channel Frequency synthesized tuning system Channel Access Direct Access Keyboard Programmable Scan Up Down CRT Size 340MM Visible Language of OSD English Spanish French an...

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Page 19: ...enter D mode press TV AV button to turn off the vertical output Adjust the SCRREEN switch on the flyback transformer to make a horizo ntal shining line just visible on the screen Turn on the vertical...

Page 20: ...Y 265 Use a color analyzer to measure the white side of the screen By changing the value of GD C BD C set the reading of the color analyzer to X 279 Y 265 Separately set the brightness and contrast fr...

Page 21: ...directly by pressing digital button 1 9 0 notebook CAP Display Sleep Calendar System INS Favorite Return Picture Menu 1 Remote key 1 Item Remark RC R cut off setting GC G cut off setting BC B cut off...

Page 22: ...ST3 50 Sharpness TV mode 3 58 system SV3 50 Sharpness AV mode 3 58 system SV4 50 Sharpness AV mode other system SVD 50 Sharpness DVD mode ASSH Asymmetric sharpness 04H bit 7 5 SHPX Maximum sharpness...

Page 23: ...Bit 3 1 decreasing contrast when menu on Bit 4 1 OSD don t disappear automatically Bit 5 1 biological Bit 6 0 CH LOCK W O V CHIP OPTM1 Bit 7 When turn on 0 child lock off 1 child lock on Bit 0 Bit 1 B...

Page 24: ...nglish 1 yes 0 no Bit 1 French 1 yes 0 no Bit 2 Portuguese 1 yes 0 no Bit 3 Spanish 1 yes 0 no Bit 4 AV Color system PAL443 1 1 yes 0 no Bit 5 AV Color system NTSC443 1 1 yes 0 no Bit 6 AV AUTO 1 AUTO...

Page 25: ...s video mode Bit 2 0 YDL 15H bit 2 0 40ns 240ns Bit 4 3 NTSC matrix 03H bit 7 6 N1 N2 DVD Bit 5 C gamma 02H bit 7 color gamma on off Bit 6 P N ID 17H bit 4 PAL NTSC killer sensit Bit 7 FID 17H bit 3 K...

Page 26: ...perature GD C G drive setting for cool color temperature BD C B drive setting for cool color temperature Menu 16 Remote key System INS Item Remark RC W R cut off setting for warm color temperature GC...

Page 27: ...u 21 no shortcut key Item Remark THEATER BAS Theater bass THEATER TRE Theater treble CONCERT BAS Concert bass CONCERT TRE Concert treble BROCAST BAS Brocast bass BROCAST TRE Brocast treble Menu 22 no...

Page 28: ...By YB Cao 24V B R G R C V U Y Y TV AUDIO CVBS Y AV2 AUDIO AV1 AUDIO E2 PROM 24C08 SDA SCL AUDIO AMP TDA7057AQ 4066 L R MCU VCD TMPA8803 CRT V AMP H OUT V OUT TDA8172 TUNER SAWF 112 V 12V 8V 9V 5V POWE...

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