Panasonic CT-32D30CB Teknik Servis Verileri - Sayfa 2

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SET 4554

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SET 4554

TUNER INFORMATION

MAIN

MAIN TUNER

MAIN

TUNER

TUNER V V V V V OL

TUNER

OLT T T T T A A A A A GE CHAR

GE CHAR

GE CHART T T T T

GE CHAR

VHF Low Band

VHF Lo

w Band

VHF High Band

UHF Band

(1) AGC

2.0V

2.1V

1.6V

(2) TU

1.1V

4.4V

5.4V

(3) ADRS

(4) SCL

3.6V

(5) SDA

3.6V

(6) NC

(7) +B

4.5V

(8) NC

(9) BTL

4.2V

7.5V

8.5V

(10) NC

(11) IF1

(12) IF

(13) BV

9.0V

(14) AUDIO

.37V

(15) GND

(16) AFT

1.9V

(17) AGC OUT

2.0V

2.1V

1.6V

(18) V

(19) AGC CONT

(20) GND

(21) ST

(22) BIL

(23) MODE

(24) F-MONO

(25) MUTE

(26) R

(27) L

NOTE: VHF Low Band voltages taken on channel 2.

VHF High Band voltages taken on channel 7.

UHF Band voltages taken on channel 14.

TEST EQUIPMENT

TEST EQ

UIPMENT

Test equipment listed by participating manufacturer illustrates typical or

equivalent equipment used by Sams engineers to obtain measurements.

This equipment is compatible with most types used by field service

technicians.

Equipment

Sencore No.

Oscilloscope

SC3100

Generators

RGB

CM2125

Multiburst Signal

VG91

Color Bar

VG91

TV Stereo

VG91

Digital VOM

SC3100

Frequency Meter

SC3100

Hi-Voltage Probe

HP200

Accessory Probes

TP212

Isolation Transformer

PR570

Capacitance Analyzer

LC102

CRT Analyzer

CR7000

AC Leakage Tester

PR570

Inductance Analyzer

LC102

Flyback Yoke Tester

TVA92

Field Strength Meter

SL753

Transistor Tester

TF46

Horizontal Analyzer

HA-2500

Video Analyzer

VG91, TVA92

MAIN TUNER

MAIN

TUNER

TUNER TERMINAL GUIDE

TERMINAL GUIDE

(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)

MISCELLANEOUS ADJUSTMENTS

NOTE: This receiver employs digital customer controls. All adjustments are at

normalized position unless otherwise indicated.

B+ CHECK

Connect a digital DC voltmeter to pin 16 (P2) of T801 and the common tie point.

Set brightness and picture to minimum. With AC line voltage set to 120VAC, B+

should read 130V* ±1.0V*.

* Taken from a common tie point.

HIGH V V V V V OL

HIGH

OLT T T T T A A A A A GE CHECK

GE CHECK

Tune in a picture. Set brightness and picture for a black raster. Connect a high

voltage probe to CRT anode. High voltage should read 30kV to 32kV.

PURITY CHECK

Press recall button on transmitter to enter purity check mode.

NOTE: Receiver must be in serviceman mode for purity colors to display on screen.

Press recall button to cycle through white, red, green, blue, and normal screens.

PURITY

Enter serviceman mode. See Purity Check to display a green raster. Loosen

deflection yoke and move it back as far as possible. Loosen locking ring and move

the purity tabs to center the vertical green band. Slowly slide the deflection yoke

forward until a uniform green screen is obtained.

CONVERGENCE

Connect a signal generator to antenna terminal and tune in a dot pattern. Adjust the

4-pole magnets to converge the red and blue dots at the center of the screen. Adjust

the 6-pole magnets to converge the red/blue dots over the green dots at the center of

the screen.

NOTE: Spread the two tabs of each set of magnets equally and opposite to converge

vertically, and rotate both tabs in the same direction to converge horizontally. Since

the four and six pole magnets interact, repeat the adjustment until center conver-

gence is correct.

Tune in a crosshatch pattern. Remove rubber wedges between the deflection yoke

and CRT. Tilt deflection yoke up or down to converge the vertical lines at the top

and bottom of the screen and the horizontal lines at the left and right sides of the

screen. Tilt the deflection yoke left or right to converge the horizontal lines at the

top and bottom of the screen and the vertical lines at the left and right sides of the

screen. Repeat convergence procedure if necessary to obtain the best overall

convergence. Replace rubber wedges.

CRT NECK ASSEMBL

T NECK ASSEMBL

T NECK ASSEMBLY Y Y Y Y

ENTERING SER

ENTERING SERVICEMAN MODE

ENTERING SER

VICEMAN MODE

Turn the receiver on and momentarily short pins 3 and 8 of connector TP. In the

upper left side of the picture, CHK is displayed in yellow. Press the action and

volume up buttons on the receiver. The CHK display turns red. The serviceman

mode is indicated by CHK displayed in red at the upper left side of the picture. Press

the power button on the remote or the action and volume down buttons on the

receiver repeatedly to select one of seven service modes.

B = Sub Adjustments

C = Cut-Off Adjustments

D = Pin Cushion Adjustments

M = Stereo Adjustments

P = PIP Adjustments

S = Options Adjustments

X = Comb Filter Adjustments

CHK = Normal operation of channel and volume buttons.

EXIT SERVICEMAN MODE

EXIT SER

VICEMAN MODE

NOTE: Always exit serviceman mode when finished making adjustments.

Press action and power buttons on receiver control panel simultaneously for

approximately 2 seconds to exit serviceman mode. The receiver will display a self

check menu with audio on channel 3.

SUB ADJUSTMENTS

NOTE: Write down original On-set values in detail before making any adjustments

in case a misadjustment occurs. Press channel up or down buttons on remote to

select any of adjustment addresses. Press volume up or down buttons on remote to

change level of adjustment.

Sub Adjustment Range and Default Levels

Adjustment

Rang

Range e e e e

Rang

Default Level

Default Le

vel

On-Set V V V V V alue

On-Set

Sub Color (B0)

0-63

Sub Tint (B1)

0-63

Sub Brightness (B2)

0-63

Sub Contrast (B3)

0-31

Sub Tint Video (B4)

0-31

Sub Color Video (B5)

0-31

Sub Tint Component (B6)

0-127

Sub Color Component (B7)

0-63

Sub Sharp TV/Video (B8)

0-31

Sub Sharp Component (B9)

0-31

Sub Contrast Fixed (Ba)

0-31

Sub Color (B0)

Tune in a color bar signal. Connect oscilloscope to pin 1 of connector C1 on the C

board. Connect TPD2 to ground. Enter serviceman mode and select Sub adjustment.

Select sub color (B0). Adjust waveform for .9Vp-p ±.05Vp-p. Remove jumper.

Sub

Sub Tint (B1)

Sub

Tint (B1)

Tune in a color bar signal. Connect oscilloscope to pin 1 of connector C1 on the C

board. Connect TPD2 to ground. Enter serviceman mode and select Sub adjustment.

Select sub tint (B1). Adjust waveform so the 1st and 4th peaks are of equal

amplitude. Remove jumper.

Sub Brightness (B2)

This adjustment must be made after sub picture and color temperature adjustments

are made. DO NOT adjust screen after sub brightness is set. Connect a color bar

signal with pure white and pure black to the antenna input. Set color to minimum.

Enter serviceman mode and select Sub adjustment. Select sub brightness (B2).

Adjust until the black bars start to turn gray, then decrease adjustment until bars

turn black.

SUB Contrast (B3)

NOTE: This adjustment is factory set, DO NOT adjust unless CRT or C board is

replaced.

Connect a color bar signal to the antenna input. Connect oscilloscope to pin 2 of

connector C1 on C board. Connect TPD2 to ground. Enter serviceman mode and

select Sub adjustment. Select sub contrast (B3). Adjust for 2.8Vp-p ± .1Vp-p from

white to black level. Do not include sync tip in measurement. Remove jumper.

alue