Panasonic CT-32SX31E, CT-32SX31UE, CT-32SX31CE, CT-36SX31E, CT-36SX31UE Service Manual

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ORDER NO. MTNC010524C1 B5

Service Manual

Color Television

Main Manual

(NA8ML)

Panasonic

Models

Chassis

CT-32SX31E BP371 CT-32SX31UE BP371 CT-32SX31CE BP371 CT-36SX31E BP372 CT-36SX31UE BP372 CT-36SX31CE BP372

This Service manual is issued as a servic e guide for the models of the NA8ML family li sted above. Includ ed in this manual are a set of schematic, block diagrams, functional descriptions, alignment procedures, disassembly procedures and a complete parts list.

“WARNING! This Service Man ual is desig ned for expe rienced repa ir technici ans only and is not designed f or use by t he general p ublic. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired onl y by experienced pro fessional technicians. Any attempt to service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.”

The service technician is required to read and follow the “Safety Precautions” and “Important Safety Notice” in this Main Manual.

and distribution is a violation of law.

Chassis Service Adjustment Procedures

All service adjustments are factory preset and should not require adjustment unless controls and/or associated components are replaced.

Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use heat sink when the HOT ground symbol

( ) is used. Otherwise, use COLD ground ( ) — Tuner shield.

A-BOARD

IC2301

IC001

T U N E R

L008

Q002

IC002

C3023

IC881

IC101

IC1801

IC3001

A/V REAR INPUTS

IC882

IC883

D-BOARD

Q804

D751

L826

L824

C840

D827

D825

T801

Q801

Q551

D511

MOMENTARILY CONNECT A JUMPER FOR ENTERING SERVICE MODE (TP8 to COLD GND)

140.0V B+ Voltage Confirmation

1. Set the Bright and the Picture to Minimum by using the Picture Menu.

2. Connect the DVM between ground ( ).

3. Confirm that B+ voltage is 140.0V ± 1.5V. This

(+ side) and cold

TPP17

LOCAT ION (D-Board) VOLTAGE

TPD7

(by D511)

220V 220.0V ± 9.0V

LOCAT ION (A-Board) VOLTAGE

TP A 6

(by IC883)

MAIN 12V 12.0V ± 0.5V

voltage supplies B+ to the Horizontal Output & Flyback circuits.

Source Voltage Chart

120V AC line input. Se t the Bright and the Picture to Minimum by using th e Picture Menu. Use cold ground

) for the (-) lead of the DVM.

(

TP A 7 TPA8 TPA16 TP A 18

(by IC3001)

(by L008)

(by Q002)

(by C3023)

MAIN 9V 9.0V ± 0.5V MAIN 5V 5.0V ± 0.3V

STBY 3.3V 3.3V ± 0.2V

BTL 30V 32.0V ± 2.0V

LOCATION (D-Board) VOLTAGE

TPP17 TPP25 TPP19

(by D825)

(by D827)

(by Q804)

+B2 140.0V ± 1.5V

9V 9.0V ± 1.5V

15V 15.0V ± 2.0V

Adjust Picture Menu for normalized video adjustments.

High Voltage Check

1. Select an active TV channel and confirm that horizontal is in sync.

2. Adjust Brightness and Picture using Picture Icon menu so video just disappears.

TPP20 TPP21

(by C840)

(by L826)

15V (VER.) 15.0V ± 1.5V

-15V (VER.) -15.0V ± 1.5V

3. Confirm B+ 140.0V is within limit.

4. Using a high voltage meter confirm that the High Voltage is 31.0kV ± 1.0kV.

TPP22 (

by L824

) SOUND 32.5V ± 2.0V

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Serviceman Mode (Electronic Controls)

This Receiver has electronic technology using the I²C Bus Concept. It performs as a control function and it replaces many mechanical controls. Instead of adjusting mechanical controls individually, many of the control functions are now performed by using “On Screen Display Menu”. (The Serviceman Adjustment Mode.)

Note: It is suggested that the tec hnician reads all the way through and understand the following proc edure for

Entering/Exiting th e Serviceman Adjustment Mode; then proce ed with the instructi ons working with th e Receiver. When becoming f ami li ar with t he procedure, the Fl ow Chart for Servicema n Mod e may be used as a quick guide.

Quick Entry to Serviceman Mode:

At times when minor adjustments need to be done to the electronic controls, the method of Entering the serviceman Mode without removal of the cabinet back is as follows using the Remote Control:

1. Select SET-UP icon and select CABLE mode.

2. Select TIMER icon and set SLEEP time for 30 Min.

3. Press ACTION button 3 times to exit menus.

4. Tune to the Channel 124.

5. Adjust VOLUME to minimum ( 0) .

6. Press the VOL button (decrease) on Receiver. Red “CHK” appears in upper corner.

To toggle between Aging and Serviceman modes:

While the “CHK” is displayed on the left top corner of the CRT, pressing the Action and the Volume Up buttons on the Receiver simultaneously will toggle between the modes. Red “CHK” for Serviceman and yellow “CHK” for Aging.

7. Press the Power Bu tton on the Remote Control to select one of the Serviceman Adjustment Modes.

1) B= Serviceman VCJ SUB-DATA ADJUSTEMENT.

2) C= Serviceman VCJ CUT-OFF ADJU STMENT.

3) D= Serviceman GEOMETRY ADJUSTMENT.

4) M= Serviceman MTS ADJ U S TM EN TS .

5) P= Service man PIP ADJUSTMENT.

6) S= Serviceman S OPTION ADJUSTMENTS.

7) X = Serviceman X OPTION ADJ U S TM ENT.

8) E = Serviceman E OPTION ADJ U S TM ENTS

9) “CHK” = Normal operation of CHANNEL and VOLUME .

Note: Only the appli c able settings for

32 B 0 2 215 C 0

the Receiver serviced will be available (See

in Fig. 20).

An address Menu appears in the right hand corner of the screen

Figure 20. Serviceman Mode Menu Adjustments.

Exiting the Serviceman Mode:

Press the Action and the Power buttons on the Receiver simultaneously for at least 2 seconds. THE RECEIVER EXITS SERVICEMAN MODE.

The Receiver momentarily shuts off; then comes back on tuned to channel 3 with a preset level of sound. Any programmed channels, channels caption data and some others user defined settings will be erased.

IMPORTANT NOTE: Always Exit the Serviceman Mode Following Adjustments.

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Press the Power Button on the Remote Control to select the Serviceman Adjustment .

For Adjustments:

1.Press Channel Up/Down on the Remote Control to select one of

the available Se rvice Adjustments (a in Fig. 20).

Note: Write Down the original

value set (b in

Fig. 20

) for each address before modifying anything. It is easy to erroneously adjust the wrong item.

2.Press Volume Up/Down on the Remote Control to adjust the level of the selected Service Adjustment (b in Fig. 20).

Sub-Data Adjustment

B00 SUB-COLOR 31 B01 SUB-TINT 40 B02 SUB-BRIGHTNESS 40 B03 SUB-CONTRAST 16 B04 SUB-TINT VIDEO 16 B05 SUB-COLOR VIDEO 22 B06 SUB-TINT COMP 63 B07 SUB-COLOR COMP 28 B08 SUB SHARP TV/VIDEO 10 B09 SUB SHARP S-VHS/COMP 17 B0A SUB-CONTRAST FIXED 15

Cut-Off Adjustment

Default

Level

Default

Level

IMPORTANT NOTE:

Always Exit the Serviceman Mode Followi ng Adjustments.

C00 CUT-OFF R 128 C01 CUT-OFF G 128 C02 CUT-OFF B 128 C03 BRIGHTNESS 31 C04 G DRIVE 64 C05 B DRIVE 64 C06 DRIVE C TEMP 8 C07 CONT C TEMP 5 C08 CUTOFF R COMP 112 C09 CUTOFF G COMP 114 C0A CUTOFF B COMP 103

To D Items.

- 18 -

Press the Power Button on the Remote Control to select the Serviceman Adjustment

For Adjustments:

1.Press Channel Up/Down on the Remote Control to select one of

the available Se rvice Adjustments (a in Fig. 20).

Note: Write Down the original

value set (b in

Fig. 20

) for each address before modifying anything. It is easy to erroneously adjust the wrong item.

2.Press Volume Up/Down on the Remote Control to adjust the level of the selected Service Adjustment (b in Fig. 20).

Geometry Adjustments

D00 H POSI TION 13 D01 V SIZE 37 D02 V S CORRECTION 5 D03 V LIN CORRECTION 8 D04 E/W TRAPEZIUM 9 D05 V AGC 1 D06 V POSITION 1 D07 V CENTERING 65 D08 V CENTERING DAC SW 0 D09 V-BLK START 12 D0A V-BLK STOP 14 D0B EW CORNER 6 D0C EW PARABOLA 11 D0D H WIDTH 20

Default

Level

D0E OSD POSITION 90

Note: Some adjustment modes may not be

available in some formats.

M00 INPUT LEVEL 33 M01 LOW-LEVEL SEPARATION 6 M02 HIGH-LEVEL SEPARATION 25

MTS Adjustment

IMPORTANT NOTE:

Always Exit the Serviceman Mode Following Adjustments.

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Default

Level

To P Items.

Press the Power Button on the Remote Control to select the Serviceman Adjustment

e e e

For Adjustments:

1.Press Channel Up/Down on the Remote Control to select one of

the available Servic e Adjustments (a in Fig.20).

Note: Write Down the original

value set (b in

Fig. 20

) for each address before modifying anything. It is easy to erroneously adjust the wrong item.

PIP Adjustment

P00 PIP COLOR 53 P01 PIP TINT 64 P02 PIP BRIGHTNESS 11 P03 PIP CONTRAST 58 P04 PIP POS V_TOP 26 P05 PIP POS V_BOTTOM 143 P06 PIP POS H_LEFT 10 P07 PIP POS H_RIGHT 101 P08 PIP POS 26

Default

Level

2.Press Volume Up/Down on th Remote Control to adjust th

level of the selected Servic Adjustment (b in Fig. 20).

P09 PIP POS 160 P0A PIP POS 10 P0B PIP POS 116 P0C N/A N/A P0D PIP YDELAY 4

To S Items.

Note: Some adjustme nt mode s ma y n ot be

available in some formats.

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Press the Power Button on the Remote Control to select the Serviceman Adjustment

e e e

For Adjustments:

1.Press Channel Up/Down on the Remote Control to select one of

the available Servic e Adjustments (a in Fig.20).

Note: Write Down the original

value set (b in

Fig. 20

) for each address before modifying anything. It is easy to erroneously adjust the wrong item.

2.Press Volume Up/Down on th Remote Control to adjust th level of the selected Servic Adjustment (b in Fig. 20).

OPTIONS Adjustment

S00 ABL GAIN 3 S01 ABL POINT 3 S02 RGB BRIGHTNESS 3 S03 RGB GAMMA 1 S04 GAMMA 1 S05 VSM-G 0 S06 BS POINT 3 S07 CLOCK ADJUST 128 S08 CAP DIGITAL FIL 0 S09 CAP SCROLL 1 S0A RGB MATRIX 6 S0B RGB MATRIX YUV 5

Default

Level

To X Items.

IMPORTANT NOTE:

Always Exit the Serviceman Mode Following Adj ustments.

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Press the Power Button on the Remote Control to select the Serviceman Adjustment

For Adjustments:

1.Press Channel Up/Down on the Remote Control to select one of

the available Se rvice Adjustments (a in Fig. 20).

Note: Write Down the original

value set (b in

Fig. 20

) for each address before modifying anything. It is easy to erroneously adjust the wrong item.

2.Press Volume Up/Down on the Remote Control to adjust the level of the selected Service Adjustment (b in Fig. 20).

X Option Adjustment

X00 V ENHANCER 3 X01 V ENH NL 1 X02 H PEAKING GAIN 2 X03 V CORING 1 X04 C TRAP GAIN 0 X05 GEO MAG CEN 179 X06 GEO MAG GAIN 10 X07 H LOCK 1 X08 H LOCK L 70 X09 H SEPA 1L 313 X0A H SEPA 2L 266 X0B H LOCK W 0 X0C H LOCK L 70 X0D H SEPA 1WL 313

Default

Level

X0E H SEPA 2WL 266

E Option Adjustment

E00 SURROUND EFFECT 3 E01 BBE LOW 4 E02 BBE HIGH 6

Default

Level

To B Items.

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To Check Purity:

Press the Recall Button on the Remote Control when in Servic eman Mode ( red “CHK” is displa yed) to enter the Purity Field Check Mode.

NORMAL SCREEN

Press Recall again to select desired field.

BLUE

SCREEN

GREEN

SCREEN

RED

SCREEN

WHITE

SCREEN

Figure 21. Purity Check Field Mode.

Helpful Hints

Entering Serviceman Mode (Back-Open Method)

1. While the Receiv er is ON or Puggled a nd operating in Norm al Mode, momentarily short test point FA 1 (TP8) to Cold Ground ( ) FA2 (TP3) A-Board.

The Receiver enters the Aging Mode

Yellow letters “CHK” appear in the upper left corner of the CRT. (The Volume Up/Down will adjust rapidly).

2. Simultaneously press the Action and the Volume Up buttons on the

Receiver Control Panel.

The Receiver enters the Serviceman Mode.

The letter in “CHK” turn red. (The Volume Up/Down will adjust normally). (All customer controls are set to nominal level).

IMPORTANT NOTE:

Always Exit the Serviceman Mode Following Adjustments.

- 23 -

Instructional Flow Chart for Serviceman Mode

IMPORTANT NOTE:

Always Exit the Serviceman Mode Following Adjustments.

WHITE

SCREEN

NORMAL MODE

Momentarily short FA1 to FA2 .

AGING MODE

• Yellow “CHK” appears in upper left corner of screen.

• Volume Up/Down operate rapidly.

• Customer C ontrols are set to nominal level.

GREEN

SCREEN

RED

SCREEN

RECALL

(ON REMOTE)

BLUE

SCREEN

WHITE

SCREEN

QUICK ENTRY TO SERVICEMAN MODE

• Select CABLE Mode.

•Set SLEEP time for 30 Min.

• Tune to Channel 124.

• Adjust Volume to minimum.

• Press VOL DOWN On Receiver.

EXIT

Adj.

needed?

Press Action + Volume Up Simultaneously (ON Receiver)

SERVICEMAN MODE

• “CHK” turns red.

• Volume Up/Down operate normally.

• Customer Controls are set to nom in al level.

RECALL

(ON REMOTE)

Adj.

needed?

POWER

(ON REMOTE)

EXIT

Press Action and Power on the Receiver simultaneously for at least 2 seconds.

ON REMOTE CONTROL TO

SELECT ADJUSTMENT

ON REMOTE TO ADJUST

VOL

THE LEVEL

SUB-DATA ADJUS TMENTS.

B ITEMS.

POWER

(ON REMOTE)

Figure 22. Flow Chart for Serviceman Mode.

- 24 -

Instructional Flow Chart f or Serviceman Mode - Continued

CUT-OFF ADJUSTMENTS.

C ITEMS.

ON REMOTE CONTROL TO

SELECT ADJUSTMENT

ON REMOTE TO ADJUST

VOL

THE LEVEL

ON REMOTE CONTROL TO

SELECT ADJUSTMENT

ON REMOTE TO ADJUST

VOL

THE LEVEL

PINCUSHION ADJUSTMENTS.

Adj.

needed?

POWER

(ON REMOTE)

D ITEMS.

Adj.

needed?

IMPORTANT NOTE:

Always Exit the Serviceman Mode Following Adjustments.

ON REMOTE CONTROL TO

SELECT ADJUSTMENT

ON REMOTE TO ADJUST

VOL

THE LEVEL

Figure 23. Flow Chart for Serviceman Mode (cont).

POWER

(ON REMOTE)

MTS ADJUSTMENTS.

M ITEMS.

Adj.

needed?

POWER

(ON REMOTE)

- 25 -

Instructional Flow Chart for Serviceman Mode - Continued

PIP ADJUSTMENTS.

P ITEMS.

ON REMOTE CONTROL TO

SELECT ADJUSTMENT

ON REMOTE TO ADJUST

VOL

THE LEVEL

ON REMOTE CONTROL TO

SELECT ADJUSTMENT

ON REMOTE TO ADJUST

VOL

THE LEVEL

OPTIONS ADJUSTMENTS.

Adj.

needed?

POWER

(ON REMOTE)

S ITEMS.

Adj.

needed?

ON REMOTE CONTROL TO

SELECT ADJUSTMENT

ON REMOTE TO ADJUST

VOL

THE LEVEL

Figure 24. Flow Chart for Serviceman Mode (cont).

Note: Some adjustments m od es may not be

available in some models depending on available options .

POWER

(ON REMOTE)

COMB-FILTER ADJUSTMENTS.

X ITEMS.

Adj.

needed?

EXIT

Press Action and Power on the Receiver simultaneously for at least 2 seconds.

IMPORTANT NOTE: Always Exit the Serv iceman Mode Following Adjustments.

POWER

(ON REMOTE)

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+ 27 hidden pages