background image

 

 

8

VSC 

11 

Vertical sawtooth capacitor 

IF IN2 

12 

Video SAW filter input 2 

IF IN1 

13 

Video SAW filter input 2 

VDRA 

14 

Vertical drive output A 

VDRB 

15 

Vertical drive output B 

AVL/EW 

16 

Capacitor for automatic volume leveling or E/W drive 

output 

DECBG 

17 

Bandgap decoupling 

SECPLL 

18 

SECAM-PLL oscillator 

GND1 

19 

Ground  VSP(chroma  processing  and  sync  and 

geometry) 

PH1LF 

20 

Acquisition PLL first phase loop 

PH2LF 

21 

Second phase loop components 

VP1 

22 

Supply VSP (5V) 

DECDIG 

23 

Digital decoupling.  

XTALOUT 

24 

24.576MHZ crystal output 

XTALIN 

25 

24.576MHZ crystal input 

IR 

26 

IR receiver 

MUTE 

27 

MUTE output 

S-INDENT/UFH 

28 

S-VIDEO indent  

KEY 

29 

Key input 

BAND2 

30 

BAND 2 

BAND1 

31 

BAND 1 

TUNING 

32 

14 BIT PWM VT output 

VDDP 

33 

Supply TCG periphery(3.3V) 

SDA 

34 

SDA output

 

SCL 

35 

SCL output

 

AV1 

36 

AV1 control  

AV2 

37 

AV2 control 

STANDBY 

38 

Standby output 

50/60HZ 

39 

50/60HZ control  

VDDC 

40 

Supply TCG core (3.3V) 

GND5 

41 

Ground TCG and digital ground VSP 

VPE 

42 

OTP programming voltage 

VDDA 

43 

Analog supply TCG digital supply VSP (3.3V) 

Summary of Contents for 15CTF66BC

Page 1: ...15CTF66BC 21CTF66BC 21CTS65BS Models ...

Page 2: ...CONTENTS 1 safety precautions 2 2 block diagram 3 3 Replacement of memory IC 4 4 Service adjustment 5 5 IC s functional description 7 6 Test point waveform 10 7 IC s voltages 11 8 Circuit diagram 12 ...

Page 3: ...eck high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kΩ 2W resitor to the anode button 9 When service is required observe the original lead dress Extra precaution should be given to assure correct...

Page 4: ...RIVE IF1 IN IF2 IN RF AGC SDA SCL V OUT H OUT RGB OUT AUDIO OUT C IN S VIDEO SPEAKER L SPEAKER R V1 IN EHT DEFLECT B 27V 12V 8V 5V 3 3V 13V 13V OPTION AN17821 TDA121XX V1 IN AL1 IN AR1 IN Y IN U IN V IN V OUT AL OUT AR OUT V2 IN AL2 IN AR2 IN LSL OUT LSR OUT SELECT V OUT V IN U IN Y IN V2 IN AL IN AR IN 3 ...

Page 5: ... circuits When replacing memory IC be sure to use IC written with the initial value of data 2 PROCEDURE FOR REPLACING MEMORY IC 1 Power off Switch the power off and unplug the power cord from AC outlet 2 Replace IC Be sure to use memory IC written with the initial data values 3 Power On Plug the power cord into the AC outlet and switch the power On ...

Page 6: ...C DESCRIPTION TEST SW 0 Internal signal V SLOPE 25 00 Picture vertical center VARIABLE 0 63 V POSI 23 00 The vertical positions VARIABLE 0 63 V SIZE 32 00 The vertical amplitude VARIABLE 0 63 V SC 32 00 The Vertical S correction VARIABLE 0 63 H PHASE 35 00 The horizontal position VARIABLE 0 63 H BLK SW ON Switch of horizontal wide blanking H BLK L 0 Time of horizontal wide blanking start of blanki...

Page 7: ...LE 0 63 B BIA 32 B bais adjusted VARIABLE 0 63 R DRV 32 R drive adjusted VARIABLE 0 63 G DRV 32 G drive adjusted VARIABLE 0 63 B DRV 32 B drive adjusted VARIABLE 0 63 SUB BRT 32 Sub Brightness VARIABLE 0 63 VSD Vertical scan disable CL 12 Cathode drive level VARIABLE 0 15 BLOC 6 Black level offset course VARIABLE 0 15 z SELECT THE SIGNAL INʻʻTEST SʼʼMENU z SELECTʻʻVSDʼʼ AND PRESSʻʻV ʼʼ KEY WILL BE...

Page 8: ... color bar signal adjust AGC value voltage from high to low to picture noise reduce gradually to be just disappeared Select shipping push V V key to be shipped 5 IC s functional description TDA111XX TDA121XX Function Main IC SYMBOL PIN DESCRIPTION IFVO 1 CVBS output front end or selected video VP2 2 Supply VSP IF and sound 5V VCCAUDIO 3 Supply VSP only sound output stage 8V PLLIF 4 IF PLL time con...

Page 9: ... Second phase loop components VP1 22 Supply VSP 5V DECDIG 23 Digital decoupling XTALOUT 24 24 576MHZ crystal output XTALIN 25 24 576MHZ crystal input IR 26 IR receiver MUTE 27 MUTE output S INDENT UFH 28 S VIDEO indent KEY 29 Key input BAND2 30 BAND 2 BAND1 31 BAND 1 TUNING 32 14 BIT PWM VT output VDDP 33 Supply TCG periphery 3 3V SDA 34 SDA output SCL 35 SCL output AV1 36 AV1 control AV2 37 AV2 c...

Page 10: ...LSL 59 Audio output loudspeaker left C2 C3 C4 AIN5R 60 Chroma or audio input AIN3 IN1R 61 Audio1 input CVBS2 Y2 62 CVBS2 input AIN2 1INL 63 AUDIO2 input CVBS Y4 AIN5L 64 CVBS1 input AN17821 17823 Function audio output Symbol PIN Function Symbol PIN Function Vcc 1 Power supply GND 7 ground Out 1 2 Ch 1 output In 2 8 Ch 2 input GND out 1 3 Ch 1Ground VOL 9 Volume Control Out 1 4 Ch 1 output Out 2 10...

Page 11: ...int Waveforms 10 TDA111XX PIN44 1 2Vpp 1 2Vpp 1 2Vpp H H H TDA111XX PIN45 TDA111XX PIN46 1 3Vpp TDA111XX PIN24 2 0Vpp H TDA111XX PIN1 0 9Vpp V451 C 5Vpp 1000Vpp H H 1Vpp V H H CRT KB CRT KG CRT KR 95Vpp 95Vpp 95Vpp H H H TDA111XX PIN56 TDA111XX PIN57 HEATER 22Vpp H 0 8Vpp 2 7Vpp V V451 B TDA111XX PIN15 TDA111XX PIN14 ...

Page 12: ... 0 2 3 1 8 5 2 6 1 8 1 8 5 0 0 3 3 0 0 PIN 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 V 3 3 3 8 3 6 0 0 3 3 0 3 3 0 0 3 3 2 2 2 2 2 2 0 2 6 PIN 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 V 0 5 1 4 1 6 1 6 1 9 5 0 0 6 0 35 2 5 2 5 0 6 2 2 1 4 2 2 1 4 STV9302A LA78040 PIN 1 2 3 4 5 6 7 V 0 7 15 12 15 0 3 15 9 0 07 AN17821 AN17823 PIN 1 2 3 4 5 6 7 8 9 10 11 12 V 12 7 0 7 3 3 1 4 0 1 4 0 7 ...

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