Panasonic TV LCD LX600 -Manual de Training

7/22/2019 Panasonic TV LCD LX600 -Manual de Training

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CTV Training Manual

K1 Chassis

13 Inch: TCD1372, TCD1373, TCD1382TXD1372, TXD1373, TXD1382

TXE1386,TXE1370

19 Inch: TXD1972, TXD1973,TXD198220 Inch: TXD2022

Samsung Electronics America

Product Support Department.

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ContentsBlock Diagrams

Power Circuit

IC Block Diagram & Pin Description

Voltage Regulation Circuit

Power Supply Description

Troubleshooting Guide

Micom Circuit

IC Pin Description

MICOM (IC901) Port Description

E-PROM (IC902) Port Description

IC Pin Voltage & Waveforms

Tuner Circuit

IF/Chroma/Video Circuit

IC Pin Description

IC Port Voltage & WaveformsTA1201 (IC201) Port Voltage & Waveform

Picture IF Block Circuit

Sound IF Block Circuit

Video Block Circuit

Chroma & OSD Block Circuit


Horizontal Deflection Chart

Horizontal Deflection Drive Block Circuit


Vertical Deflection Circuit

IC Description & Operation

Vertical Deflection Drive Block Circuit

Troubleshooting GuideSound Circuit

IC Port Voltage & Waveforms

ICK01 Port Voltage & Waveform

IC601 Port Voltage & Waveform


CRT Drive Circuit

Alignment and Adjustments

Service Mode Adjustments

Alignment and Adjustment


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K1 Chassis

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Block Diagrams


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Power Circuit


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IC Block Diagram & Pin Description

IC802 (SMR-40100)IC802 Multi RegulatorPin No Description Stand-by Power-On

Voltage Voltage

1 5V Input for Pin 9 13V 12.5 V

2 9V Input for Pin 8 13 V 12 V

3 Reset Noise Filter 2.5 V 2.5V

4 Power Control Input 0 V 4.7 V

5 GND 0 V 0 V6 Micom Reset Output 4.3 V 4.3 V

7 Feedback 0 V 2.3 V

8 9V Vcc Output 0 V 8.7 V

9 5V Vcc Output 5 V 5 VIIC801


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(STAND-BY) IC801 PIN 1

HC801 PIN 4

(STAND-BY) IC801 PIN 2

HC801 PIN 6

(STAND-BY) 1C801 PIN 3

(POWER ON) 1C801 PIN 1

HC801 PIN 4

(POWER ON) IC801 PIN 2

HC801 PIN 6

(POWER ON) 1C801 PIN 3

ACQUISITION MODE: PEAK DETECT


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(STAND-BY) IC801 PIN 4 (STAND-BY) IC801 PIN 3 (STAND-BY) 1C801 PIN 8

(POWER ON) 1C801 PIN 4 (POWER ON) IC801 PIN 3 (POWER ON) 1C801 PIN 8


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(POWER ON) T801 PIN 4

CONT.BR: Min

(STAND-BY) T801 PIN 12 (POWER ON) T801 PIN 4

CONT: Max.BR: Center

(POWER ON) T801 PIN 12 (POWER ON) T801 PIN 4

CONT.BR: Max

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(STAND-BY) T801 PIN 9 (POWER ON) T801 PIN 9

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Voltage Regulation Circuit

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1. Initial Start

AC In -> D801 -> NT801 -> HC801 Pin 1 -> HC801 Pin 6 -> IC801 Pin 2 -> S/TR(Q1) base -> S/TR(Q1) On

2. S/TR On-time control

Once S/TR turns on. the an induced voltage in D winding supplies the base current to base of S/TR to keep it turned on.

Charged cap.(C 1) inside HC801 during S/TR OFF starts to discharge through:

HC801 Pin 6 -> IC801 Pin 2 -> S/TR (Q1) Base

Output voltage(S Winding) Down -> D Winding Voltage Down -> C851 Down ->

Error Amp Al output current Down & Current through IC801 Pin 1 to base of Q3 Down

Cap. C2 between Base and Emitter of Q3 charges slowly, and On-time increases.

Output voltage(S Winding) Up -> D Winding Voltage Up -> C851 Up -> Error Amp Al output current Up & Current

through IC801 Pin 1 to base of Q3 Up -> Cap. C2 between Base and Emitter of Q3 charges faster, and On-time

decreases.

CONTINUED


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3. S/TR Off-time control

As base-engineer of Q3 reaches about 0.6V. the Q3 turns on, and S/TR Q1 turns off, and reverse voltages are induced in all

windings. The reverse voltage. induced in D winding mm to discharge cap. C1 between Pin 3 and 6 of HC801 and Cap. C2

between base and emitter of Q3, then charges them in reverse direction through zenor diode inside IC801 between C-E of Q3

and through R5.D1 between base of Q3 and nondotted terminal of D winding.

Off-time is time duration from the moment the load current starts to flow and to the moment it decreases to zero. How fast the

current decreases to zero depends on peak- current in primary winding during S/TR on. If output is to be regulated then the

load current slope should remain same, thus the bigger the peak current the longer Off-time is.

After the load current decreases to zero, the charged cap. C 1 supplies base current to S/TR Q I to turn it on again.

CONTINUED


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4. Output Regulation

Typical Switching On/Off time

AC Voltage: 120 Vrms

Condition T on T off Switching Freq.

Contrast.Bright:Max 5 uS 13 uS 55.6 KHz

Cont:Max, Bright: Center 4.5 uS 11 uS 64.5 KHz

Contrast,Bright:Min 3 uS 10 uS 76.9 KHzStand-By 2 uS 7 uS 111.1 KHz

Any voltage change in output is reflected through D winding, and then turn-on time is controlled by voltage of charged cap.

C851 during S/TR off, and voltage of D winding.

By controlling On-time, the peak current can be controlled, and in turn the output can be regulated.


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Micom Circuit

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IC Pin Description

1. Micom (IC901) Port DescriptionPin No Pin Name In/Out Description6 SOUND MUTE OUTPUT SOUND MUTING

9, 10 KEY IN IN/OUT VOLTAGE CONTROLLED KEY INPUT

11 AFT INPUT FINE TUNING

12 HOLD INPUT POWER-OUT DETECTION

14 LED 1 OUTPUT STAND-BY: RED, TIMER:GREEN

15 LED2 OUTPUT LED FLASHING W/REMOTE KEY PRESSED

17 D-COIL OUTPUT DEGAUSSING CONTROL

18 POWER OUTPUT POWER ON/OFF CONTROL

19 A/V IN1 INPUT VIDEO JACK PRESENCE DETECTION

20 SPOT OUTPUT CRT SPOT CONTROL

22~24 R,G,B OUT OUTPUT OSD,TEXT RGB OUTPUT

25 BLK OUTPUT BLANKING

26 H-SYNC INPUT HORIZONTAL SYNC

27 V-SYNC INPUT VERTICAL SYNC

28,29 OSC IN/OUT IN/OUT VIDEO IN FOR CAPTION DECODING

31,32 X-TAL 1,2 IN/OUT OSCILLATION33 RESET INPUT RESET

34 VDD INPUT MAIN B+

36 IR-IN INPUT REMOTE SIGNAL DETECTION

39 SCL1 OUTPUT SERIAL CLOCK

40 SDA1 IN/OUT SERIAL DATA

42 CCD OUTPUT OSD ???


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IC Pin Description2. E-Prom (IC902) Port Description

Pin No Pin Name In/Out Description

1~3 A0~A2 INPUT ADDRESS INPUTS

4 VSS INPUT GND

5 SDA IN/OUT SERIAL DATA

6 SCL INPUT SERIAL CLOCK

7 WC INPUT WRITE CONTROL


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IC Pin Voltage & Waveforms1. IC901 Port Voltages & WaveformsPin No Voltage & Waveform

6 Mute On: 0.65 V Volume Min: 0.65 V Mute Off: 0.1 V

9 See print-out

10 See print-out

11 No signal: 1.2 V Tuned: 1.2 V Detuned: See print-out

12 3.7 V

14,15 0.2 V (LED off)

17 When Reset Pin changes from 0V to 5V, Pin 17 Voltage becomes 0.7 V for about 2 seconds, then goes down to 0 V.

18 Power On: 5 V Power Off: 0 V19 Video Jack In:5 V Video Jack Out: 0.4 V

20 Power On: 0 V Power Off: 5 V

22,23,24 OSD On (MENU): 0.6 Vp-p No OSD: 0.2 Vp-p

25 ?

26 See print-out

27 See print-out

28 See print-out

29 1.6 V31,32 See print-out

33 4.9 V

34 4.9 V

36 No Remote key pressed: 4.9 V Any key pressed: 4.9 Vp-p

38 4.9 V

39,40 0.2 Vp-p OSD On: 0V

42 ?

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MICOM PIN 9 MICOM PIN 10 MICOM PIN 11

MICOM PIN 26 MICOM PIN 27 MICOM PIN 28

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MICOM PIN 31 MICOM PIN 32

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Tuner Circuit


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IF/Chroma/Video Circuit


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IC Pin DescriptionTA1201 (IC201) Port DescriptionPin No Pin Name In/Out Description

1,2 SOUND OUTPUT OUTPUT Volume controlled sound output

3 RF AGC OUT OUTPUT Detected RF AGC goes to Tuner

4 SIF TANK COIL IN/OUT 4.5 Mhz SIF Tank for FM detection

5 AGC FILTER IN/OUT To reduce noise on RF AGC output

6 PIF GND - -

7,8 PIF INPUT INPUT Input for Saw Filter Output

9 PIF VCC INPUT 0

10 PLL LOOP FILTER IN/OUT Filter to stabilize PLL circuit

11 APC FILTER IN/OUT Filter to stabilize APC circuit12 3.58 MHZ VCXO IN/OUT Oscillation for chroma processing

13 V/C/D gnd - -

14 BLANKING IN (OSD) INPUT OSD blanking signal input from Micom

15~17 OSD RGB INPUT INPUT OSD RGB input from Micom

18 DIGITAL VCC INPUT -

19~21 RGB OUTPUT OUTPUT Analog RGB output

22 VERTICAL OUTPUT OUTPUT Vertical deflection drive pulse output

23 NFB INPUT Negative Feedback input for Amplitude adjustment

24 VERT RAMP INPUT Ramp pulse input for vertical position control

25 VERT SYNC FILTER IN/OUT Vertical sync separation filter

26 H-DRIVE CKT B+ INPUT -

27,28 I2C BUS IN/OUT IN/OUT Micom bus line data clock

29 X-RAY INPUT Monitor abnormal HV increase

30 FBP INPUT INPUT Flyback pulse input for AFC control

31 SYNC OUT OUTPUT Composite sync output

32 H-OUT OUTPUT Horizontal deflection drive pulse output


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TA1201 (IC201) Port Description (continued)Pin No Pin Name In/Out Description

33 AFC FILTER IN/OUT Filter to stabilize AFC output34 32FH VCO IN/OUT Oscillation to make Hor. & Vertical drive pulse

35 DIGITAL GND - -

36 ABL INPUT Beam current feedback input for limiting Brightness

37 TV INPUT INPUT Composite video input

38 ACL INPUT Beam current feedback input for limiting Contrast

39 EXT VIDEO INPUT INPUT External video input

40 BLACK PEAK IN/OUT Peak black level detection

41 VIDEO S/W OUTPUT OUTPUT Selected video output

42 DC RESTORATION IN/OUT Detects average peak level of Y signal

43 Y INPUT INPUT Y signal input

44 AFT OUTPUT AFT out for fine tuning

45 C INPUT INPUT C signal input

46 V/C/D VCC INPUT -

47 TV DET OUT OUTPUT Detected video signal output

48 SIF VCC INPUT -

49,50 PIF TANK COIL IN/OUT PIF tank for video detection & AFT detection

51 SIF GND - -

52 LIMITER INPUT INPUT Limits amplitude of SIF signal and sets reference level

53 TV AUDIO INPUT INPUT Detected FM signal output54 DE-AMPHASIS IN/OUT Deamphasizes the detected FM signal

55,56 EXT AUDIO INPUT INPUT External audio input


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IC Port Voltage & Waveforms1.TA1201 (IC201) Port Voltage & Waveforms

Pin No Voltage & Waveform

1

3 No Picture: 7.8 V

Picture (Color Bar): 4.8 V

4 See print-out

5 No Picture: 4.6 V

Picture (Color Bar): 4.1 V

7, 8 See print-out9 8.6 V

10 When CH is changed, voltage swings from

3.6 V to 4.2 V

11 5.8 V

12 See print-out

18 3.2 V

19,20,21 See print-out

22 See print-out24 See print-out

25 See print-out

26 See print-out

29

30 See print-out

31 See print-out


32 See print-out

33 T V

34 See print-out

36, 38 Contrast Bright Pin 36 Pin 38

Max Max 3.0 V 3.0 V

Max Center 2.7 V 3.4 V

Min Min 2.3 V 2.8 V37 See print-out

40 5 V (Color Bar)

41 Same as pin 37

42 See print-out

43 See print-out

44 Detuned: See print-out Tuned: 0.6 V

45 See print-out

46 8.6 V47 See print-out

48 8.5 V

49, 50 See print-out

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IC201 PIN 4 IC201 PIN 7, 8 IC201 PIN 12

IC201 PIN 19, 20, 21 IC201 PIN 37 IC201 PIN 43


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IC201 PIN 45 IC201 PIN 49, 50

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Picture IF Block Circuit PIF Process DescriptionThe IF signal from the tuner enters the SAW filter after being amplified

through the IF pre AMP lo compensate the insert loss of file SAW filter.

The output of like SAW filler is sent to pin 7,8 of IC201. The amplified

IF signal through the PIF AMP enters Q-DET and I-DET circuits.

The Q-DET circuit generates error voltage by the phase difference

between 90 degree shifted VCO output signal and PlF carrier signal.

The error voltage is smoothed by the loop filter, and controls the VCO

circuit for synchronization with the PHF carrier and also enters the AFT

circuit.

The AFT circuit amplifies the DC component of VCO Control voltage,

and outputs AFT voltage through pin 44. The VCO free-run frequency is

controlled by the bus.

The I-DET circuit detects TV signal from VCO output signal and PIF

signal. The detected TV signal is output from pin 47, and to the Lock

and AGC detection circuits.

The Lock detection circuit determines whether the AFT tuning is com-

plete. When completed, it mutes the AFT circuit.

The AGC detection circuit detects file sync level of TV signal and con-

trols file gains of tuner RF-AMP and PIF-AMP to maintain the constant

sync level. The reference voltage level to RF AOC AMP can be con-

trolled by the bus.

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Sound IF Block Circuit SIF Process DescriptionThe 4.5MHz SIF signal from Pin 6 of ICK01 goes through the

BPF to eliminate any remaining video component, and isinput to the limiter circuit.

The limiter circuit limits the 4.5 MHz SIF signal amplitude,

and send the signal to the FM detection circuit.

The FM is detected by the use of quadrature detection method

with the VCO controlled phase shifted oscillation by the tank

coil connected to Pin 4.

The detected FM signal goes to the audio switching circuit via

the Deamphasis circuit.

The external audio signal enters the switching circuit via pin

55,56. The TV audio or external audio can be selected by the

bus control. The selected audio signal enters the audio AMP

and is outputted through pin 1,2 with volume controlled by

the bus.

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Video Block Circuit


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Video Block CircuitVideo Process DescriptionThe TV signal output from pin 47 is applied to pin 37 TV In through 4.5MHz Trap circuit to remove any remaining audio sig-nal, still sent to switching circuit. The selected signal is amplified twice for sync separation.

Meanwhile, the external video signal enters through pin 39. The output signal of pin 41 is reduced to half by like resistor

divider circuit and Q202 to the original amplitude and enters pin 43 video clamp amp circuit and pin 45 chroma circuit.

The clamp circuit limits, and establishes the reference amplitude of Y signal.

The video signal through clamp circuit enters black stretch circuit after a color signal is removed by 3.58 MHz Trap, which is

turned on/off by the bus.

The black stretch circuit extends Y signal toward more black level, emphasizes contrast, and limits amplitude of Y signal. The

black level detecting filter is connected to pin 40.

Then the Y signal enters the DC restoration circuit, which detects the average peak level of the Y signal and controls the clamp

circuit by the difference between the reference set by the clamp circuit and pedestal level of the Y signal.

The Y signal passed through the DC restoration circuit adjusts the timing to the chroma signal at the Y-DL circuit.

The Y signal passes through brightness, contrast circuit, and WPL circuit where the amplitude is limited. ACL, and ABL cir-

cuit limits peak amplitude of contrast and brightness level.


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Chroma & OSD Block CircuitChroma Block Circuit

OSD Block Circuit


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Chroma & OSD Block CircuitChroma Process Description

The chroma signal is defected from the input video signal of

pin 41 through 3.58 MHz BPF after DC component is cut out

by the coupling cap. C235 and noise filter.

The detected chroma signal enters ACC circuit where the

color burst signal is detected. With detected burst signal's

amplitude, the color signal level is controlled through the

Micom bus.

The gain-controlled chroma signal enters the color circuit, and

the burst signal enters the APC slid killer circuit. The color

circuit controls the output of color/B & W signals by the mute

signal of the killer circuit. The color/B&W signal enters the

demodulation circuit.

The APC circuit outputs an error signal caused by the phase

difference between reference carrier of the VCXO circuit andcolor burst signal. The error signal is smoothed by the filter

connected to pin 11 and Controls the VCXO Circuit.

The 3.58 MHz reference carrier synchronized to the color

burst signal enters the APC circuit, killer circuit, and tint cir-

cuit. The killer circuit compares oscillations between color

burst signal and reference carrier. If there is no color burst

signal (B&W signal) at low level burst signal caused by poor

reception, the mute signal is output by the killer circuit. Thetint circuit through the Micom bus controls the phase of the

reference carrier.

This controlled signal enters the demodulation circuit. The

demodulation circuit demodulates color difference signal from

the chroma signal and reference carrier. Next the LPF

removes unnecessary harmonic waves. The matrix demodu-

lates RGB signal from the Y and color difference signal.

OSD Process Description

The OSD Signal is converted by the timing between the RGB

signal and fast blanking signal, and goes to the cut-off/drive

circuit, which mixes OSD RGB with picture RGB signals.

The out of mixed RGB signal is applied to CRT pre-drive

amp.

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Horizontal Deflection Chart

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IC201 PIN 30 IC201 PIN 32


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POINT 1 POINT 2 POINT 3



GND


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IC201 PIN 31, 32

(HS:31)

IC201 PIN 31, 32

(HS:0)


GND

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Horizontal Deflection Drive Block Circuit

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Horizontal Deflection Drive Block CircuitHorizontal Deflection Drive Process Description

The video signal input to the horizontal sync separation circuit becomes a composite sync signal and enters AFC-1 circuit and

vertical sync separation circuit.

Immediately it is output from the pin 31. The AFC-1 circuit outputs the error voltage caused by the phase difference between

the composite sync signal and H count down output signal, and this error voltage is smoothed by the filter connected to the pin

33. The error voltage also controls the 32fH VCO circuit, which controls the frequency of the ceramic oscillator connected to

the pin 34 and outputs the 32fH signal synchronized to the horizontal sync signal.

This synchronized signal enters the H count down circuit, which outputs signals divided from the 32fH signal. This dividedsignals enter AFC-1, AFC-2, V count down, and H-Ramp circuits.

The AFC-2 circuit, which outputs error voltage caused by the phase difference between the H countdown output signal and

flyback pulse signal, controls the horizontal output circuit. At this time, the H-Out signal is generated to set the horizontal sig-

nal and flyback pulse phase through the bus.

The horizontal signal is output from the pin 32. The horizontal position of the picture is controlled by the bus which sets the

phase between the synch signal and flyback pulse.

The horizontal circuit can be cut off by the X-ray circuit if the input voltage of the pin 29 goes above the critical limit (about

0.5 V).

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Vertical Deflection Circuit

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IC Description & OperationIC301 KA2131

Pin DescriptionPin No Description Remarks

1 GND

2 Vertical Drive Output 50 Vp-p

4 Pump Up Cap. Connection 424 V(48 Vp-p)6 Vertical Drive Input Vertical Oscillation

7 Sawtooth Input Sawtooth Input

8 Blanking Pulse Output Blanking Pulse

9 B1 424 V

Deflection Current Flow1. During First Half Deflection Cycle

24 V Line --> D301 --> Pin 4 --> Q1 --> Pin 2 -->

C306 --> DY --> R304

* Q1 On, Q2 Off

2. During Second Half Deflection CycleQ3061 --> Pin 2 --> Q2 --> R304 --> DY --> C306

* Q1 Off, Q2 On

3. During Vertical Retrace Period

Q309--> Pin 4--> Q1--> Pin 2--> C306--> DY--> R304

* Q1 On, Q2 Off

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Vertical Deflection Drive Block Circuit Vertical Deflection Drive Process Description

The video signal input to the horizontal sync separation cir-cuit becomes a composite sync signal and enters AFC-1 cir-

cuit and V-sync separation circuits.

The vertical sync separation circuits separates the vertical

sync from the composite sync signal by the filler connected to

the pin 25.

The vertical sync signal enters the vertical count down circuit

where the vertical drive signal is obtained after counting down

with the H CID circuit output as the reset signal.

This vertical drive signal enters vertical ramp circuit, which

outputs a compensated drive signal through the pin 22. The

NFB signal from the pin 23 compensates the drive signal for

correct phase and amplitude. Also the filter connected to the

pin 24 is controlled by the bus. By controlling the

charging/discharging current the vertical size of the picture isdetermined.

Also by changing timing the vertical position can be adjusted.

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K1 Ch i

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47


POINT 4 POINT 5

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POINT 6 POINT 7

POINT 8 POINT 9

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IC201 PIN 22(VA:0)

IC301 PIN 2(VA:0)

IC201 PIN 22

(VA:63)

IC301 PIN 2

(VA:63)


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Sound Circuit

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IC Port Voltage & Waveforms

1. ICK01 Port Voltage & Waveform


1 See printout

2 See printout

3 6.6 V

6 See printout

7 8.7 V

9 6.7 V

1. IC601 Port Voltage & Waveform


1 11.8 V

2 11.8 V

3 See printout6 See printout

8 See printout

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K1 Chassis

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IC201 PIN 1(VOL:Max) IC201 PIN 52 ICK01 PIN 1, 2

IC201 PIN 53

(VOL:Max)

IC201 PIN 54 ICK01 PIN 6


ACQUISITION MODE: PEAK DETECT ACQUISITION MODE: PEAK DETECT

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K1 Chassis

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IC601 PIN 3

(VOL:Max)

IC601 PIN 6

(VOL:Max)

IC601 PIN 8

(VOL:Max)


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CRT Drive Circuit

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IC201 PIN 20

(Green Raster Inp. SB: 0) IC201 PIN 20(Green Raster Inp. GG: 0)

IC201 PIN 20

(Green Raster Inp. SB: 63)

IC201 PIN 20

(Green Raster Inp. GG: 255)


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POINT 4 POINT 5

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Q502 C

(Red Raster Inp. RC: 0)

Q502 C


Q502 C

(Red Raster Inp. RC: 255)

Q502 C


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4. Alignment and Adjustments4-1 Service Mode Adjustments

4-1-1 Service Mode MenusSince there are no VCRs in the K1 chassis, all adjustments

after parts replacement must be done in the Service Mode.

Service Mode adjustments are necessary when either the EEP-

ROM (IC902) or the CRT is replaced.

4-1-2 Entering the Service Mode

Press the following transmitter keys while in Stand-by mode:

MUTE > 1 > 8 > 2 > POWER

"Factory Mode Menu" is displayed.

Enter Service Mode using the Volume +, keys.

Service Mode Menu:

Select a mode to be adjusted, using the channel down key.

Example: VCO.

Change the data with the Volume +, keys.

CONTINUED

VCO 71

Age XX GG XXX

VCO XX BG XXX

SCT XX SB XX

SCR XX VA XX

STT XX VS XX

RC XXX HS XX

GC XXX SS XX

BC XXX SVC MUTE

Age XX GG XXX

VCO XX BG XXX

SCT XX SB XXSCR XX VA XX

STT XX VS XX

RC XXX HS XX

GC XXX SS XX

BC XXX SVC MUTE

Adjustment

Test Pattern

Set Option Byte

Factory Reset

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Return to the Service mode by pressing MENU

Return to the Factory mode via the MENU key.

Press POWER to enter the Stand-by mode.

Adjustment

Test Pattern

Set Option Byte

Factory Reset

Age XX GG XXX

VCO XX BG XXX

SCT XX SB XXSCR XX VA XX

STT XX VS XX

RC XXX HS XX

GC XXX SS XX

BC XXX SVC MUTE

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4-1-3 Adjustment in Option Mode

This adjustment is necessary whenever the EEPROM is

replaced. Input data (as marked on the back cabinet).

Select SET OPTION by pressing the Channel z key twice.

Press the Volume +, keys to enter the set Option mode.

Set each bit to "0" or "1" via the Direct Access Keys (0-7) of

the transmitter. Example: To set Byte ) to 2, press the Direct

Access Key "1". See below:

Press MENU to go back to the factory mode.

Select RESET with the the Channel z key.

Press volume + key.

POWER

OFF

Adjustment

Test Pattern

Set Option Byte

Factory Reset

Adjustment

Test Pattern

Set Option ByteFactory Reset

76543210

BYTE 0 0000001 0

BYTE 0

76543210

BYTE 0 0000000 0

BYTE 0

Adjustment

Test PatternSet Option Byte

Factory Reset

Adjustment

Test Pattern

Set Option Byte

Factory Reset

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4-1-4 Service Mode Adjustments

1. The Pattern Adjustment is done only in the factory. Do

not attempt to readjust it.

2. Refer to 4-2 for other adjustments

3 Set OPTION data (as marked on the back-cabinet

label).

4-1-5 Service Mode Adjustment Ratings

Initialized

MICOMNo. Item Function Range data

1 AGC RF AGC Adjustment 0-63 43

2 VCO PIF VCO Adjustment 0-127 63

3 SCT Sub-contrast Adjustment 0-63 39

4 SCR Sub-color Adjustment 0-27 4

5 STT Sub-tint Adjustment 0-27 19

6 RC Red-cut off Adjustment 0-255 0

7 GC Green-cut off Adjustment 0-255 08 BC Blue-cut off Adjustment 0-255 0

9 SVC Input a Horiz. line pattern

10 GG Green gain Adjustment 0-255 90

11 BG Blue gain Adjustment 0-255 140

12 SC Sub-brightness Adjustment 0-63 16

13 VA Vertical Phase Size Adjustment 0-63 25

14 VS Vertical Center Adjustment 0 0

15 HS Horizontal Phase Adjustment 0-31 1516 SS Sub-sharpness Adjustment 0-31 25

AdjustmentTest Pattern

Set Option Byte

Factory Reset

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4-2 Alignment and Adjustment4-2-1 General Alignment Instruction

1. Usually, a color TV needs only slight touch-up adjust-

ment upon installation. Check the basic characteristics

such as picture height, focus and a horizontal and verti-

cal sync.

2. Observe the picture and check for good black and white

details. There should be no objectionable color shading:

If color shading is present, demagnetize the receiver. If

color shading persists, perform purity and convergence

adjustments described below.3. To protect against shock hazard, use an isolation trans-

former.

4-2-2 Power Supply Check

Check the following:

A:Power plug is connected; "Stand-by" mode

B:Power On when "Power ON" button is pressed

C: power On by FBT. Each supply is marked on its lead-inwire.

4-2-3 Focus Adjustment

Adjust the focus control on the FBT for well defined scanning

lines.

4-2-4 Fail Safe Circuit Check (FS)

1. The failsafe check must be the final step in servicing.

2. Turn the power switch ON and adjust customer controlsfor normal operation.

3. Temporarily short pin X to pin R on the main board

(RX05, RX04) with a jumper wire. Raster will disap-

pear.

4. The TV must remain in this state even after removing

the jumper wire. This show that the failsafe circuit is

working properly.

5. To recover picture and sound, temporarily turn off theTV and allow the failsafe circuit more than 30 seconds

to reset. Then switch power ON to produce normal pic-

ture and sound.

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4-2-5 IC902 Replacement

1. When IC902 is replaced, all values are reset to

"Initialized MICOM Data" and readjustment is neces-sary.

2. Press POWER button 10 seconds after plug-in.

3. To enter the service mode, refer to 4-1 (Service Mode

Adjustment).

4-2-6 PIF VCO Adjustment

1. Use a Pattern Generator or an off-air signal.2. Open pin 11 of micom (IC901) or one side of lead pin

for R237.

3. Adjust VCO in the service mode to set IC101 Pin 44

(AFT) to 2.5V +/ 0.4 V.

4-2-7 RF-AGC Adjustment

1. Input a PHILLIPS pattern (CH40)2. Set the input signal to 60dB.

3. Enter into the AGC in the service mode.

4. Adjust AGC until color bar noise disappears.

4-2-8 Sub-Contrast Adjustment

1. Input a gray scale pattern. Use a pattern generator

(PM5518).2. Short D208 to switch off the ABL feed-back.

3. Check CN201 R-OUT with an oscilloscope.

4. Set RC, BC, GC data to 0 in the Service Mode.

5 Adjust SCT to 2.40 +/ 0.1Vp-p.

6. Remove the short across D208 and restore ABL.

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4-2-9 Sub-Tint Adjustment

1. Input a rainbow pattern.

2. Check CN201 B-OUT with an oscilloscope.3. Adjust STT in the service mode until the 6th peak is the

highest and the 5th and 7th peaks have equal heights.

4-2-10 Sub-Color Adjustment

1. Do sub-color adjustments after the Sub-Contrast and

Sub-Tint adjustments.2. D208 should still be shorted. The ABL should still be

switched OFF.

3. Input a color barpattern. Use a pattern generator

(PM5518).

4. Check CN201 R-OUT (use and oscilloscope).

5. Ensure that the RC, GC, and BC data are 0, BG are 140

and GG should be 90.

6. Adjust SCR to 2.4 +/ 0.1Vp-p (black and red levels).7. Remove the short across D208 and restore ABL.

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4-2-11 White Balance Adjustment

(a) Low-light adjustments

1. Input either a lion head or "pure white" color pattern.

2. Operate the receiver for 30 minutes.3. Check the data in the service mode:

RC, GC, BC are 0 and SB is 16;

Steps BG are 90 and GG are 140.

4. Enter the horizontal line mode by pressing the MUTE

key.

5. Adjust the screen VR on the FBT until a dim colored

line (red, green or blue) appears on the screen.

6. After pressing the MUTE key, go to RC, BC, or GCwith channel z, y keys. After putting a dim coloredline (red, green or blue) in the horizontal line with the

MUTE key, adjust color with volumez, y keys.

(b) High-light adjustments

1. Input a high-light pattern.

2. Adjust GG, BG in the Service Mode.

3. Recheck in low light.

4-2-12 Sub-Brightness Adjustment

1. Input a Toshiba pattern.

2. Warm up the receiver for 10 minutes.3. Enter the SErvice Mode and set SB to the point where

the 5th point is brighter in the gray scale.

4-2-13 Vertical Size Adjustment

1. Input a lion head pattern.

2. After the vertical center adjustment, enter into the ser-

vice mode.

3. Adjust VA so that the each top and bottom of the screen

is 4.0. If the top and bottom values are different, adjust

VA so that the sum of the two values is 8.0.

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4-2-14 Horizontal Size Adjustment

1. Receive a lion head pattern.

2. Enter into the service mode.3. Adjust HS to symmetrize right and left.

4-2-15 When CRT is Replaced

Do the following adjustments after the basic purity and con-

vergence adjustments.

1. White balance2. Sub-brightness

3. Vertical Size

4. Horizontal Size

5. Fail safe (should be the final step).

Panasonic TV LCD LX600 -Manual de Training

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