Sharp CX51N3, CX51N4 Schematic

SERVICE MANUAL

S02S8CX51N3//

COLOUR TELEVISION

Chassis No. GA-1

CX51N3/N4

CX51N4CX51N3

MODELS

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

CX51N3 CX51N4

FEATURE

PAL B/G

NTSC(A V Thru)

Full Auto Channel Preset and Auto Channel Skip

100 CH Program Memory

CATV (Hyper Band) Ready

AVL (Sound Keeper) Function

High Contrast Picture (Black Stretch Circuit)

ON Timer/Sleep T imer/Reminder Timer

Blue Back Noise Mute

Front AV In and Rear AV In/Out Terminals (Front AV Priority)

Colour-Comb Filter (NTSC AV In)

Hotel Mode

Front Headphone Jack

Multi Laguage OSD (English/Chinese/French/ Arabic/Malay/Russian)

White Temperature Adjustment

CONTENTS

Page

» SPECIFICATIONS .............................................2

» IMPORTANT SERVICE NOTES ........................ 2

» ADJUSTMENT PRECAUTIONS........................3

» MEMORY MAP ................................................ 11

» GA1 HOTEL MODE APPLICATION ................ 15

» TROUBLE SHOOTING TABLE........................16

» SOLID STATE DEVICE BASE DIAGRAM .......18

» WAVEFORMS ..................................................19

» CHASSIS LAYOUT ..........................................20

» BLOCK DIAGRAM...........................................22

» DESCRIPTION OF SCHEMATIC DIAGRAM ..26 » SCHEMA TIC DIAGRAM

CRT UNIT.....................................................27

MAIN UNIT ...................................................28

HEADPHONE UNIT ..................................... 32

BURST UNIT................................................ 33

» PRINTED WIRING BOARD ASSEMBLIES..... 34

» REPLACEMENT PARTS LIST

ELECTRICAL PARTS

MAIN UNIT ................................................... 40

CRT UNIT.....................................................43

HEADPHONE UNIT ..................................... 43

BURST UNIT................................................ 44

SUPPLIED ACCESSORIES.........................44

PACKING PARTS......................................... 44

CABINET PARTS ......................................... 44

CABINET PARTS LOCATION...................... 45

» PACKING OF THE SET...................................46

Page

WARNING

The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user – serviceable parts inside. Refer servicing to qualified service personnel.

SHARP CORPORATION

SPECIFICATIONS

Convergence ................................................................................. Self Converging System

Focus .........................................................................Electrostatic Focus High Bi-Potential

Sweep Deflection................................................................................................... Magnetic

Intermediate Frequencies

Picture IF Carrier ............................................................................................... 38.9 MHz

Sound IF Carrier Frequency

5.5 MHz .......................................................................................................... 33.4 MHz

Colour Sub-Carrier Frequency ....................................................................... 34.47 MHz

Power Input ........................................................................................ AC220 - 240V, 50 Hz

Power Consumption

CX51N3 .................................................................................................................. 74 W

CX51N4 .................................................................................................................. 79 W

Audio Power Output Rating

CX51N3 ................................................................................................. 3.0 W (at Max.)

CX51N4 ................................................................................................. 5.0 W (at Max.)

Speaker

Size

CX51N3 ...................................................................................... 9 × 5 cm Elliptic (1 pc)

CX51N4 .................................................................................... 9 × 5 cm Elliptic (2 pcs)

Voice Coil Impedance......................................................................... 16 ohms at 400 Hz

Aerial Input Impedance

VHF/UHF ....................................................................................... 75 ohm Unbalanced

Receiving Channels (PAL-B/G)

» VHF .......................................................................................... AU0 thru AU12 ch

» UHF ........................................................................................AU28 thru AU69 ch

Receiving Frequency

» VHF-Channels.................................................................... 44.25 thru 463.25 MHz

» UHF-Channels ................................................................. 471.25 thru 863.25 MHz

IMPORTANT SERVICE NOTES

Maintenance and repair of this receiver should be done by

SERVICING OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE

When servicing the high voltage system, remove static charge from it by connecting a 10k ohm Resistor in series with an insulated wire (such as a test probe) between picture tube dag and 2nd anode lead. (AC line cord should be disconnected from AC outlet.)

1. Picture tube in this receiver employs integral implosion protection.

2. Replace with tube of the same type number for continued safety.

3. Do not lift picture tube by the neck.

4. Handle the picture tube only when wearing shatterproof goggles and after discharging the high voltage completely

X-RAY

This receiver is designed so that any X-Ray radiation is kept to an absolute minimum. Since certain malfunctions or servicing may produce potentially hazardous radiation with prolonged exposure at close range, the following precautions should be observed:

1. When repairing the circuit, be sure not to increase the high voltage to more than 28.0 kV (at beam 0 µA) for the set.

2. To keep the set in a normal operation, be sure to make it function on 25.0 kV kV (at beam 1,100 µA) in the case of the set. The set has been factory – Adjusted to the above-mentioned high voltage.

If there is a possibility that the high voltage fluctuates as a result of the repairs, never forget to check for such high voltage after the work.

3. Do not substitute a picture tube with unauthorized types and/or brands which may cause excess X-ray radiation.

qualified service personnel only .

±1.5

CX51N3/N4

Dimensions

CX51N3 ............................................................................................. Width: 499.0 mm

Height: 478.0 mm

Depth: 476.5 mm

Weight (Approx.): 20.5 kg

CX51N4 ............................................................................................. Width: 594.0 mm

Height: 465.0 mm

Depth: 473.0 mm

Weight (Approx.): 21.0 kg

Cabinet Material ................................................................................................. All Plastics

Specifications are subject to change without prior notice.

2-1 2-2

BEFORE RETURNING THE RECEIVER

Before returning the receiver to the user, perform the following safety checks.

1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the receiver.

2. Inspect all protective devices such as non-metallic control knobs, insulating fishpapers, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacity networks, mechanical insulators and etc.

ADJUSTMENT PRECAUTIONS

SERVICE MODE

This model’s setting are adjusted in two different ways: though the I2C bus control and in the conventional analog manner. The adjustments via the I2C bus control include preset-only items and variable data.

CAUTION: Make sure TV Set is in "Normal" Condition before switch to Service Mode for

adjustment.

1. Setting the service mode by the microprocessor.

1 Make a short-circuit 137 and 138 for a second and release to switch to the service mode

position and the microprocessor is in input mode. (Adjustment through the I2C bus control). (Use JWS Key to set as well).

2 Press the CH DOWN / UP key on the remote controller to get ready to select the mode

one by one.

3 Press the CH DOWN / UP key on the remote controller to select the modes reversibly

one by one.

4 Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified. 5 Make a short-circuit 137 and 138 for a second and release to switch to the normal mode

(OFF) position and the microprocessor is in out of the service mode.

2. Factory Presetting.

1 Make a short-circuit JA137 and JA138, then turn ON the main power and release to

switch to service mode position. Initial values are automatically preset, only when a new EEPROM is used (Judge with the first 4 bytes).

2 The initial data are preset as listed in pages 4-6. 3 Make sure the data need modify or not (Initial data).

Note: Once the chassis has been assembly together and ready to be POWER ON for the

FIRST TIME, make sure to make a short-circuit 137 and 138 switch to the service mode position first and then turn on the main power switch. (See 2-1 above).

Precaution: If haven’t done this initiation, it may possibly generate excessive Beam current.

3. For reference please check with memory map (GA1 Series type RH-iX3368CE)

(1)In the Service Mode, Key is used to select the mode in the following order.

AGC &

GEOMETRIC

MODE

MISC.

OPTION

MODE

AGC &

GEOMETRIC

MODE

AGC TAKE OVER POINT (AGC)

VERTICAL SLOPE (V-LIN)

VERTICAL AMP (V-AMP)

VERTICAL SHIFT (V-CENT)

HORIZONTAL SHIFT (H-CENT)

EAST-WEST WIDTH (H-SIZE) HORIZONTAL PARALLELOGRAM (EW//) EAST-WEST PARABOLA/WIDTH (PARA) EAST-WEST UPPER COR. PB (COR(U)) EAST-WEST LOWER COR. PB (COR(L))

EAST WEST TRAPEZIUM (TRAPE)

HORIZONTAL BOW (HB)

S-CORRECTION (S-COR)

↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓

W.P. GREEN COOL W.T.(DRI-GC)

W.P. GREEN WARM W.T.(DRI-GW)

WHITE POINT

ADJ.

MODE

OPTION

MODE

WHITE POINT

ADJ.

MODE

W.P RED STD. W.T. (DRI-RS)

W.P. GREEN STD. W.T.(DRI-GS)

W.P.BLUE STD. W.T. (DRI-BS)

W.P. RED COOL W.T.(DRI-RC)

W.P. BLUE COOL W.T.(DRI-BC) W.P. RED WARM W.T.(DRI-RW)

W.P. BLUE WARM W.T. (DRI-BW)

↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓

FORWARD : CH DOWN KEY REVERSE : CH UP KEY

MAX VOLUME (SUB-VOL)

SUB CONTRAST (SUB-CON)

SUB COLOUR (SUB-COL)

SUB BRIGHTNESS (SUB-BRI)

SUB TINT (SUB-TINT) SUB SHARPNESS (SUB-SHP) MAX HOTEL VOLUME (HTL-VOL) HOTEL PROGRAM NO(HTL-PRG)

OSD RGB REFERENCE (RGB) BLACK LEVEL OFFSET R(CUT-R) BLACK LEVEL OFFSET G(CUT-G) CATHODE DRIVE LEVEL(CDL)

SUB ADJ.

MODE

Y-DELAY

ADJ.

MODE

OFFSET

ADJ.

MODE

SUB ADJ.

MODE

↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓

FORWARD : CH DOWN KEY REVERSE : CH UP KEY * ( ) means OSD display.

3-1 3-2

CX51N3/N4

Y-DELAY

ADJ.

MODE

Y-D TIME FOR PAL (TV) (DL-PT)

Y-D TIME FOR SECAM (TV) (DL-ST)

Y-D TIME FOR N358 (TV) (DL-3T) Y-D TIME FOR N443 (TV) (DL-4T)

Y-D TIME FOR B/W (TV) (DL-TV) Y-D TIME FOR PAL (AV) (DL-PA)

Y-D TIME FOR SECAM (AV) (DL-SA)

Y-D TIME FOR N358 (AV) (DL-3A)

Y-D TIME FOR N443(AV) (DL-4A) Y-D TIME FOR B/W (AV) (DL-AV)

SOUND SYSTEM M (S-M)

SOUND SYSTEM DK (S-DK)

SOUND SYSTEM I (S-I)

SOUND SYSTEM BG (S-BG)

PLAYBACK SECAM (P-SECAM)

FE (RF) NTSC 3.58 (F-N358) FE (RF) NTSC 4.43 (F-N443) FE (RF) SECAM (F-SECAM)

VIDEO MUTE AT IDENT LOSS (VMI)

VIDEO MUTE AT PROGRAM

/SOURCE CHANGE (VMC)

REDUCED FM DEMODULATION

GAIN FOR BTSC SIGNAL (BTSC)

↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓

*(Y-D : Y-DELAY)

MISC.

OPTION

MODE

↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓

↓

HOTEL MODE (HTL)

↓

OFFSET

ADJ.

MODE

COLOUR OFFSET (PAL) (COL-OP)

COLOUR OFFSET (SECAM) (COL-OS) COLOUR OFFSET (NTSC358) (COL-O3) COLOUR OFFSET (NTSC443) (COL-O4)

SHARPNESS OFFSET (PAL) (SHP-OP)

SHARPNESS OFFSET (SECAM) (SHP-OS) SHARPNESS OFFSET (NTSC358) (SHP-O3) SHARPNESS OFFSET (NTSC443) (SHP-O4)

NUMBER OF EXT AV SOURCE (AV)

FM WINDOW SELECTION (FMWS)

SOUND MUTE BIT 0 (SM0) SOUND MUTE BIT 1 (SM1)

THAI LANGUAGE (THA)

ARABIC LANGUAGE (ARA)

MALAY LANGUAGE (MAL) CHINESE LANGUAGE (CHI) FRENCH LANGUAGE (FRE)

RUSSIAN LANGUAGE (RUS)

FORCED V-SYNC SLICING LEVEL(FSL)

SYNC OF OSD (HP2)

TUNER SELECTION (CPT)

↓ ↓

↓

↓ ↓ ↓ ↓ ↓

↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓

ENABLE VERTICAL GUARD (EVG)

VOLUME CONTROL TABLE (MSA) OUTPUT VERTICAL GUARD (NDF)

OPTION

MODE

VERTICAL SCAN DISABLE(VSD)

BLACK STRETCH (BKS)

AUTO V OLUME LEVELING(A VL)

FAST FILTER IF-PLL(FFI)

EHT TRACKING MODE (EHT)

OVERSCAN SWITCH OFF(OSO)

AUTO COLOUR LIMIT(ACL)

FORCED COLOUR LIMIT(FCO)

IF AGC SPEED BIT 0 (AGC0)

IF AGC SPEED BIT 1 (AGC1) FOA Time Constant-RF (FOA-FE) FOB Time Constant-RF (FOB-FE) FOA Time Constant-AV (FOA-AV) FOB Time Constant-AV (FOB-AV)

LED BLINK SPEED (LED-F)

↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓

↓

BILINGUAL(BIL)

↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓

USER DATA IN SERVICE MODE

* Direct Key-in. for Service Item in Service Mode.

RC COMMAND SERVICE-ITEM

FUNCTION AGC

CONTRAST DOWN V-LIN

COLOUR DOWN V-AMP

BRIGHTNESS DOWN V-CENT

TINT DOWN H-CENT

SHARPNESS DOWN EW / /

SYSTEM HB

BLUEBACK S-COR

TIMER SUB-VOL

CONTRAST UP SUB-CON

COLOUR UP SUB-COL

BRIGHTNESS UP SUB-BRI

TINT UP SUB TINT

SHARPNESS UP SUB-SHP

4-1 4-2

After short JA137 & 138, and turn on the main power switch, read data from E2PROM address 00H ~ 03H, and compare to the list below, if different, initialize the E2PROM.

Address : Data Address : Data

00H : 55H 02H : 43H 01H : 4FH 03H : A1H

AGC TAKE OVER POINT AGC 0~63 14 ADJ VERTICAL SLOPE V-LIN 0~63 32 ADJ VERTICAL AMPLITUDE V-AMP 0~63 32 ADJ VERTICAL SHIFT V-CENT 0~63 32 ADJ HORIZONTAL SHIFT H-CENT 0~63 32 ADJ EAST-WEST WIDTH H-SIZE 0~63 32 *FIX HORIZONTAL PARALLELOGRAM EW// 0~63 32 *FIX EAST-WEST PARABOLA/WIDTH PA RA 0~63 32 *FIX EAST-WEST UPPER CORNER PARABOLA COR (U) 0~63 32 *FIX EAST-WEST LOWER CORNER PARABOLA COR (L) 0~63 32 *FIX EAST-WEST TRAPEZIUM TRAPE 0~63 32 *FIX HORIZONTAL BOW HB 0~63 32 *FIX S-CORRECTION S-COR 0~63 0 (20) *FIX WHITE POINT RED STD WHITE TEMP DRI-RS 0~63 32 *FIX WHITE POINT GREEN STD WHITE TEMP DRI-GS 0~63 32 ADJ WHITE POINT BLUE STD WHITE TEMP DRI-BS 0~63 32 ADJ WHITE POINT RED COOL WHITE TEMP DRI-RC 0~63 25 *FIX WHITE POINT GREEN COOL WHITE TEMP DRI-GC 0~63 32 ADJ (DRI-GS)-7 DATA WHITE POINT BLUE COOL WHITE TEMP DRI-BC 0~63 32 ADJ WHITE POINT RED WARM WHITE TEMP DRI-RW 0~63 32 *FIX WHITE POINT GREEN WARM WHITE TEMP DRI-GW 0~63 32 ADJ (DRI-GS)-7 DATA

WHITE POINT BLUE WARM WHITE TEMP DRI-BW 0~63 32 ADJ (DRI-BS)-7 DATA MAX VOLUME SUB-VOL 0~63 63 *FIX SUB CONTRAST SUB-CON 0~63 63 *FIX SUB COLOUR SUB-COL 0~63 32 ADJ SUB BRIGHTNESS SUB-BRI 0~63 32 ADJ SUB TINT SUB-TINT 0~63 32 ADJ SUB SHARPNESS SUB-SHP 0~63 32 (20) *FIX MAX HOTEL VOLUME HTL-VOL 0~63 32 *FIX HOTEL PROGRAM NUMBER HTL-PRG OSD GRB REFERENCE RGB 0~15 15 ADJ BLACK LEVEL OFF-SET R CUT-R 0~63 32 ADJ BLACK LEVEL OFF-SET G CUT-G 0~63 32 ADJ CATHODE DRIVE LEVEL CDL 0~15 0 (7) *FIX Y-DELAY TIME FOR PAL(TV) [YD] DL-PT 0~15 12 *FIX Y-DELAY TIME FOR SECAM(TV) [YD] DL-ST 0~15 15 *FIX Y-DELAY TIME FOR N358 (TV) [YD] DL-3T 0~15 12 *FIX Y-DELAY TIME FOR N443 (TV) [YD] DL-4T 0~15 12 *FIX Y-DELAY TIME FOR B/W (TV) [YD] DL-TV 0~15 12 *FIX Y-DELAY TIME FOR PAL (AV) [YD] DL-PA 0~15 12 *FIX Y-DELAY TIME FOR SECAM (AV) [YD] DL-SA 0~15 15 *FIX Y-DELAY TIME FOR N358 (AV) [YD] DL-3A 0~15 12 *FIX Y-DELAY TIME FOR N443 (AV) [YD] DL-4A 0~15 12 *FIX Y-DELAY TIME FOR B/W (AV) [YD] DL-AV 0~15 12 *FIX COLOUR OFFSET (PAL) COL-OP 0~15 8 ADJ *2 COLOUR OFFSET (SECAM) COL-OS 0~15 8 ADJ COLOUR OFFSET (NTSC358) COL-O3 0~15 4 ADJ *2 COLOUR OFFSET (NTSC443) COL-O4 0~15 4 ADJ *2 SHARPNESS OFFSET (PAL) SHP-OP 0~15 8 *FIX SHARPNESS OFFSET (SECAM) SHP-OS 0~15 4 *FIX

EEPROM ITEMS OSD DATA LENGTH

0~99 OR>99FOR NONE

INITIAL DATA FIX/ADJ

255 *FIX

REMARK

SAME AS (DRI-BS) DATA

SHARPNESS OFFSET (NTSC358) SHP-O3 0~15 12 (8) *FIX SHARPNESS OFFSET (NTSC443) SHP-O4 0~15 8 *FIX VERTICAL SCAN DISABLE VSD BLACK STRETCH BKS AUTOMATIC VOLUME LEVELING AVL FAST FILTER IF-PLL FFI ENABLE VERTICAL GUARD (RGB BLANKING) EVG EHT TRACKING MODE (HCO) EHT OVERSCAN SWITCH OFF OSO AUTO COLOUR LIMIT ACL FORCED COLOUR LIMIT FCO SOUND SYSTEM M S-M SOUND SYSTEM DK S-DK SOUND SYSTEM I S-I SOUND SYSTEM BG S-BG PLAYBACK SECAM P-SECAM FE (RF) NTSC 3.58 F-N358 FE (RF) NTSC 4.43 F-N443 FE (RF) SECAM F-SECAM VIDEO MUTE AT IDENT LOSS VMI VIDEO MUTE AT PROGRAM/SOURCE CHANGE HOTEL MODE HTL REDUCED FM DEMODULATOR GAIN FOR BTSC SIGNAL NUMBER OF EXTERNAL AV SOURCE AV FM WINDOW SELECTION FMWS SOUND MUTE BIT 0 SM0 SOUND MUTE BIT 1 SM1 THAI LANGUAGE THA ARABIC LANGUAGE ARA MALAY LANGUAGE MAL CHINESE LANGUAGE CHI FRENCH LANGUAGE FRE RUSSIAN LANGUAGE RUS FORCED V-SYNC SLICING LEVEL FSL SYNC OF OSD HP2 TUNER SELECTION (0:SHARP/ALPS;1:MURATA) CPT 0(DISABLE)/1(ENABLE) 0 BILINGUAL BIL IF AGC SPEED BIT 0 AGC0 IF AGC SPEED BIT 1 AGC1 PHI-1 TIME CONSTANT (RF) FOA-FE PHI-1 TIME CONSTANT (RF) FOB-FE PHI-1 TIME CONSTANT (OFF AIR) FOA-AV PHI-1 TIME CONSTANT (OFF AIR) FOB-AV LED BLINK SPEED LED_F VOLUME CONTROL PWM TABLE MSA OUTPUT VERTICAL GUARD NDF

NOTE :

EEPROM ITEMS OSD DATA LENGTH

0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE)

VMC

0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE)

BTSC

0(DISABLE)/1(ENABLE)

0 FOR1 AV/1 FOR 2AV 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE) 0(DISABLE)/1(ENABLE)

1) *FIX: PLEASE DO NOT CHANGE FIXED DATA WITHOUT SPECIFIC INSTRUCTION. Please set the EEPROM initial data according to the value in parenthesis ( ) before adjustment.

2) *2: ADJUST COLOUR OFFSET AFTER ADJUST SUB-COLOUR. COLOUR OFFSET (PAL) COL-OP : 8 ------> 14 COLOUR OFFSET (NTSC358) COL-03 : 4 ------> 10 COLOUR OFFSET (NTSC443) COL-04 : 4 ------> 10

3) *3: SET:S-DK = 1 _ 0 S-I = 1 _ 0 P-SECAM = 1 _ 0 F-N443 = 1 _ 0 F-SECAM = 1 _ 0

INITIAL DATA FIX/ADJ

0 *FIX 1 *FIX 1 *FIX 0 *FIX 1 *FIX 1 *FIX 0 *FIX 0 *FIX 0 *FIX 0 *FIX 1 ADJ *3 1 ADJ *3 1 *FIX 1 ADJ *3 0 *FIX 1 ADJ *3 1 ADJ *3 1 *FIX 1 *FIX 0 *FIX 0 *FIX

1 (0) *FIX

0 *FIX 1 *FIX 0 *FIX 0 *FIX 1 *FIX 1 *FIX 1 *FIX 1 *FIX 1 *FIX 0 *FIX 0 *FIX

0 *FIX 1 *FIX 0 *FIX 0 *FIX 0 *FIX 1 *FIX

1 *FIX 0 (1) *FIX 0 (1) *FIX 0 (1) *FIX

REMARK

*FIX

CX51N3/N4

5-1 5-2

CX51N3/N4

INITIAL SETTING

(1)Please set to MCL2. (2) After set the MCL, Please set the Initial setting to Initial 3 (All channel Sound System will

set to B/G)

CH-No. Fv (MHz) SOUND SYS

0 590.25 B/G 1 46.25 B/G 2 64.25 B/G 3 86.25 B/G 4 95.25 B/G 5 138.25 B/G 6 175.25 B/G 7 182.25 B/G 8 189.25 B/G

9 196.25 B/G 10 209.25 B/G 11 216.25 B/G 12 41.10 13 41.10 14 41.10 15 41.10 16 41.10 17 41.10 18 527.25 B/G 19 847.25 B/G 20 48.25 B/G 21 175.25 B/G

22 210.25 B/G 23 224.25 B/G 24 575.25 B/G 25 599.25 B/G 26 767.25 B/G 27 183.25 B/G 28 527.25 B/G 29 112.25 B/G 30 168.25 B/G 31 41.10 32 294.25 B/G 33 463.25 B/G 34 174.95 B/G 35 175.55 B/G 36 41.10 37 590.25 B/G 38 41.10 39 41.10 40 41.10 41 41.10 42 41.10 43 41.10 44 174.95 B/G 45 175.55 B/G 46 41.10

MCL2

SHIPPING SETTING & CHECKING

(1)The following default data has been factory-set for the E2PROM.

LAST PROGRAM/CHANNEL 1 FLASHBACK PROGARM/CH 1

After pressing "MODEL SETTING", 0 channel will be skipped.

ITEMS DATA SETTING

DIGIT 1 C-SYSTEM AUTO S-SYSTEM B/G

SKIP OFF

AFC ON

VOLUME 1

CONTRAST 60 (MAX)

COLOUR 0 (CENTER)

BRIGHTNESS 0 (CENTER)

TINT 0 (CENTER) SHARPNESS 0 (CENTER) WHITE TEMP STANDARD

REMINDER TIMER In-active, "--:--"

ON TIMER In-active, "--:--"

OFF TIMER In-active, "--:--"

LAST POWER POWER-ON

LANGUAGE ENGLISH

BLUE BACK MUTE ON

HOTEL MODE OFF

0 CHANNEL SKIP ON

LAST TV/AV TV

99 41.10

6-1 6-2

ADJUSTMENT PRECAUTION: Make sure TV Set in "Nomal Condition" before switch to Service Mode for Adjustment.

PIF ADJUSTMENT

NO. Adjustment part Adjusting procedure and conditions Waveform and others

Tuner IFT

(PRESET)

2 RF-AGC

TAKE OVER POINT

ADJUSTMENT (I2C BUS CONTROL)

1. Get the tuner ready to receive the E-9 CH signal, but with no signal input. Adjust the PLL data.

2. Connect the sweep generator's output cable to the tuner antenna. (RF SWEEP)

3. Adjust the sweep generator's to 80dBuV.

4. Connect the response lead (use LOW IMPEDANCE probe with wave detector; see Fig.1) to the tuner's IF output terminal. (This terminal must have the probe alone connected).

5. Set the RF AGC to 0 - 6 V with no saturation with the waveform.

6. Adjust the tuner IF coil to obtain the waveform as shown in Fig. 2.

Note:Be sure to keep the tuner cover in

position during this adjustment.

1. Receive "PAL COLOUR BAR" signal. » Signal Strength: 57 ±1 dBµV (75 ohm open)

2. Connect the oscilloscope to TP201 (Tuner’s AGC Terminal) as shown in Fig. 3.

Oscilloscope

0.1V –

Bias box

TP201+

TV Set

Oscilloscope

Note:

For the 50 ohm signal strength gauge, when not using 50/75 impedance adapter, signal strength is 52 ±1 dBµV(75 ohm open), instead of 57 (75 ohm open).

Precaution:

The loss of using impedance adapter

1n60

10k

100k

Fig. 1

P C

Fig. 2

75ohm

E-9 CH

±1 dBµV

1000p

IF OUT

-1.5+/-0.8dB

PURITY ADJUSTMENT

NO. Adjustment part Adjusting procedure and conditions Waveform and others

PURITY ADJ. 1. Receive the GREEN-ONLY signal. Adjust the

beam current to ~ 700 µA

2. Degauss the CRT enough with the degausing coil.

3. Maintain the purity magnet at the zero magnetic field and keep the static convergence roughly adjusted.

4. Observe the points a, b, as shown in Fig. 1-1 through the microscope. Adjust the landings to A rank requirement.

5. Orient the raster rotation to 0 eastward.

6. Tighten up the deflection coil screws. » Tightening torque: 108N ± 20 N

(11kgf ± 2 kgf)

7. Make sure the CRT corners landing meet the A rank requirements. If not, stick the magnet sheet to correct it.

Note:This adjustment must be done after

warming up the unit for 30 minutes or longer with a beam current over 700

* For the following colours press R/C RGB key to

change.

Green-only

Blue-only

Signal-colour

screen cleared

µA.

Red-only

Fig. 1-1

Fig. 1-2

Rank "A"

(on the right of the CRT)

A = B

–

» Bias box: About 4.5 V

Fig. 3

3. Call "AGC" mode in service mode. Adjust the "AGC" bus data to obtain the Tuner output pin drop 0.1 V below maximum voltage.

4. Change the antenna input signal to 63~67dBµV, and make sure there is no noise.

5. Turn up the input signal to 90~95 dBµV to be sure that there is no cross modulation beat.

7-1 7-2

Fig. 1-3

Rank "A"

(on the left of the CRT)

* Press R/C RGB key for 1 sec-

ond in NORMAL MODE, the colour will change to RGB mono colour mode.

CX51N3/N4

CONVERGENCE ADJUSTMENT

NO. Adjustment part Adjusting procedure and conditions Waveform and others

1 CONVERGENCE

ADJ. (To be done after the purity adjustment.)

1. Receive the "Crosshatch Pattern" signal.

2. Using the remote controller, call NORMAL mode.

Static convergence

1. Turn the 4-pole magnet to a proper opening angle in order to superpose the blue and red colours.

2. Turn the 6-pole magnet to a proper opening angle in order to superpose the green colour over the blue and red colours.

Dynamic convergence

1. Adjust the convergence on the fringes of the screen in the following steps. a) Fig. a : Drive the wedge at point "a" and

swing the deflection coil upward.

b) Fig. b : Drive the wedge at point "b" and "c"

and swing the deflection coil downward.

c) Fig. c : Drive the "c" wedge deeper and

swing the deflection coil rightward.

d) Fig. d : Drive the "b" wedge deeper and

swing the deflection coil leftward.

2. Fix all the wedges on the CRT and apply glass tape over them.

3. Apply lacquer to the deflection yoke lock screw, magnet unit (purity, 4-pole, 6-pole magnets) and magnet unit lock screw.

Finally received the Red-only and Blue-only signals to make sure there is no other colours on the screen.

4-pole magnet

6-pole magnet

CRT neck

Purity magnet

Lacquer

20mm

B G R

R G B

About 100°

Lacquer

Wedge "b"

BGR

Fig. a

RGB

Fig. b

RGB

Fig. c

BGR

Fig. d

Wedge "a"

B G R

R G B

About 100°

Wedge "c"

CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT

NO. Adjustment part Adjusting procedure and conditions Waveform and others

CRT CUTOFF

ADJUSTMENT

C BUS

(I CONTROL)

2 SUB-

BRIGHTNESS ADJUSTMENT

C BUS

(I CONTROL)

3 WHITE

BALANCE SERVICE MODE ADJ. (I2C BUS CONTROL)

Remark

1. Before CRT cutoff adjustment, SUB-BRIGHT, DRIRS/RW/RC, DRI-GS/GW/GC, DRI-BS/BW/BC, CUT-R and CUT -G must be INITIAL DATA.

2. CRT Cutoff adjustment must be done inside a dark room.

1. Switch TV to VIDEO mode,BLUE BACK OFF, with NO VIDEO signal.

2. Press R/C to set Picture Normal condition.

3. First, off the screen by adjust screen variable resistor.

*4. Next, checking AKB circuit function by slowly increase

screen variable resistor until colour raster suddenly on and off (AKB start function).

5. Then continue adjust until retrace line appear.

6. Finally, slowly decrease the screen variable resistor until screen retrace line cut off (Not Raster)

Note :

Must confirm the AKB function in set before continue the next adjustment.

1. Call " SUB-BRI" in service mode. (Receive Crosshatch pattern with 5 black level windows)

2. Adjust the " SUB BRIGHT " bus data in order that the line 1and 2 have the same darkness wherelse line 3 is one step (data) brighter than line 2. Finally data minus 1 to make line 1, 2, and 3 are in same level (darkness).

1. Receive the "WHITE" pattern with BURST signal.

2. Press R/C to set Picture NORMAL condition.

3. Connect the DC miliammeter between TP602 (-) TP603 (+).

4. Check Beam current should be around 1100 µA.

5. Set it to service mode and adjust the DRI-GS, & DRIBS data to have a colour temperature of 12300°K ( white ). * Note .

6. Receive "WHITE" pattern, WITH BURST signal, and set BRIGHTNESS Y by generator, to **10 cd/m2 (MINOLTA CA-100) by reducing LUMINATE Y signal.

7. Adjust "CUT-R" & "CUT-G" to get desired colour temperature #. Then go back NORMAL mode (HIGH BRIGHT**) to check colour temperature. If out of range, back to 1.

Note:This adjustment must be done after warm-

ing up the unit for 30 minutes or longer with a beam current over 700

* Adjust DRI-GC/GW, DRI-BC/BW as following DATA,

after finishing DRI-BS and DRI-GS DATA ADJUSTMENT.

DRI-RW = 32 (FIXED), DRI-RS = 32 (FIXED) DRI-BC = "DRI-BS" (For 12300° K Condition)

µA.

*Alternative Procedure (1) Step (1), (2), (3) and (4) are same

as beside procedure.

(2) Then continue adjust until retrace

line appear and make sure the colour appear whether red, green or biue.

(3) Connect the oscilloscope to related

test points as below which is based on colour appear at (2) RED = TP47R, GREEN =TP47G, BLUE = TP47B

(4) Then adjust Screen VR until the tip

of signal reach (3.2Vdc)

3.2Vdc

1 2 3 4 5

Line 3 is one step (data) brighter than line 2 2

1 2 3 4 5

# 12300°K X : 0.272

(MINOLTA COLOUR ANALYZER CA-

100)

*Note: Above Data can be UP/DOWN

by Volume key.

* 12300°K DRI-GW="DRI-GS"-7

Y : 0.275

LOW HIGH 10cd/m2 120cd/m2

DRI-BW="DRI-BS"-7 DRI-GC="DRI-GS"-7 DRI-RC=25

4 Max.

beam check

1. Receive the "Monoscope Pattern" signal.

2. Press R/C to set Picture NORMAL condition.

3. Connect the DC miliammeter between TP603 (+) & TP602 (–). (Full Scale: 3 mA Range) Beam current must be within 1100 ± 100 µA.

8-1 8-2

HORIZONTAL AND VERTICAL DEFLECTION LOOP ADJUSTMENT

NO. Adjustment part Adjusting procedure and conditions Waveform and others

V-SLOPE (I BUS CONTROL)

V-SHIFT-50

(I CONTROL)

V-AMP50 (I2C BUS CONTROL)

H-SHIFT (50)

(H-CENTER)

S-CORRECTION (I CONTROL)

SUB-

SHARPNESS

1 Focus 1. Receive the "Monoscope Pattern" signal.

C BUS

1. Receive Monoscope Pattern Signal.

2. Call the "V -LIN" mode.

3. Increase or decrease "V-LIN" by Volume key till the horizontal line in the center of monoscope is just at the position where the blanking starts.

1. Call the "V -CENT" mode.

2. Increase or decrease "V-CENT" by V olume key till the picture is centered.

1. Call the "V -AMP" mode.

2. Increase or decrease "V - AMP" by Volume key to set overscan of 9.5% typical. Adjustment Spec 9.5% range +1% -0%.

1. Call the "H-CENT" mode.

2. Increase or decrease "H-CENT" by Volume key to center the picture horizontal.

1. SET DATA TO 20

* Check the E-5 CH Monoscope Pattern then re-

adjust V-Slope, V -Shift and V -Amp to makesure adjustment is in acceptable Ring-Shaped.

1. SET DATA TO 20

2. Press R/C to set Picture NORMAL condition.

3. Adjust the focus control to get the best focusing.

PAL CHROMA ADJUSTMENT

NO. Adjustment part Adjusting procedure and conditions Waveform and others

1 SUB COLOUR

C BUS

CONTROL)

1. Receive the "PAL Color Bar" signal.

2. Press R/C to set Picture Normal condition.

3. Connect the oscilloscope to Red cathode(D882 Chathode).

» Range : 20 V/div. (AC) (Using 10:1 probe) » Sweep time : 10 µsec/div.

4. Using the R/C call "SUB COL" in SERVICE mode. Adjust SUB COLOUR bus data, so that the 75% White & Red portions of PAL Color Bar be at the same level shown as Fig. 1-1.

* Before adjust SUB-COL, make sure COL-

OP=8, COL-O3=4, COL-O4=4. After adjust SUB-COL,set COL-OP=14, COL-O3=10, COL-O4=10.

5. Clear the SERVICE mode.

9-1 9-2

75%

Y 100%W

Fig. 1-1

Mg R

NTSC CHROMA ADJUSTMENT

NO. Adjustment part Adjusting procedure and conditions Waveform and others

1 SUB-TINT

C BUS

CONTROL)

1. Receive the "NTSC3.58 Colour Bar" signal thru AV in.

2. Connect the oscilloscope to TP47B (P882 pin

5) BLUE-OUT.

Range : 100mV/div. (AC) (Use Probe 10:1)

» »

Sweep time: 10 µsec/div.

3. Call the "SUB-TINT" mode in service mode. Adjust the "SUB-TINT" bus data to obtain the waveform shown as Fig. 1-1.

4. Clear the SERVICE mode.

SAME LEVEL

WYCy G Mg R

Fig. 1-1

PROTECTOR OPERATION CHECKING

NO. Adjustment part Adjusting procedure and conditions Waveform and others

1 BEAM

PROTECTOR

2H.V

PROTECTOR

3 Other

protectors

NO. Adjustment part Adjusting procedure and conditions Waveform and others

VIDEO AND

AUDIO OUTPUT CHECK

2 VIDEO AND

AUDIO INPUT CHECK

1. Receive "Monoscope Pattern" signal.

2. Set CONTRAST MAX.

3. Set BRIGHT MAX.

4. During the Collector & Emitter of Q883/5/7 short, make sure the protector ON and switch to standby mode.

1. Receive "Monoscope Pattern" signal.

2. Connect output of Bias Box to D603 cathode (R610 side).

3. Set voltage of Bias Box to 18V and make sure the protector is not work.

4. Set voltage of Bias Box to 27V , and make sure the protector is work.

1. Once finish rectified Electrolytic Capacitor short testing in +B line, check all possible damaged components on +B line. (Use random selected set for inspection)

* Select one of Q883/5/7 to do

each short test.

A/V INPUT AND OUTPUT CHECKING

1. Receive the "PAL Color Bar" signal (100% White Color Bar, Sound 400 Hz 100% Mod).

2. Terminate the Video output with a 75 ohm impedance. Make sure the output is as specified (1.0 Vp-p ±3 dB).

3. T erminate the Audio output with a 10k ohm impedance. Make sure the O/P is as specified (1.76 Vp-p ±3 dB).

1. Using the TV/A V key on the remote controller, make sure that the modes change in order of TV, AV & TV again and the video & audio output are according to the input terminal for each mode.If connect input to Front and Rear AV terminal, input terminal of Front AV will be selected.

CX51N3/N4

FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)

NO. Adjustment part Adjusting procedure and conditions Waveform and others

CONTRAST

key

2 COLOUR key 1. Receive "Colour Bar" signal.

3 BRIGHTNESS

key

4 TINT key 1. Receive the "NTSC Colour Bar" signal thru AV

5 SHARPNESS

Key

6 CH DISPLAY

COLOUR

1. Receive "Monoscope Pattern" signal.

2. Set P-Mode to select CONTRAST.

3. Press Volume Up/Down key to check whether the CONTRAST effect is OK or not.

2. Set P-Mode to select COLOUR.

3. Press Volume Up/Down key to check whether the COLOUR effect is OK or not.

1. Receive "Monoscope Pattern" signal.

2. Set P-Mode to select BRIGHTNESS.

3. Press Volume Up/Down key to check whether the BRIGHTNESS effect is OK or not

in.

2. Set P-Mode to select TINT.

3. Press Volume Up/Down key to check TINT, UP for GREEN direction and DOWN for PURPLE direction whether is OK or not.

1. Receive "Monoscope Pattern" signal.

2. Set P-mode to select SHARPNESS.

3. Press Volume Up/Down key to check whether the SHARPNESS effect is OK or not.

1. All Ch (1~99) will have an OSD display of the channel number in green colour under AFT ON condition.

FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)

(Continued)

NO. Adjustment part Adjusting procedure and conditions Waveform and others

Colour

system

10 NOISE MUTE

CHECKING

1. Receive the "PAL COLOUR BAR" signal, press the COLOUR SYSTEM key to select modes except PAL, check the COLOUR is not working properly. Then, select the "PAL" mode. Check again its colour so that it is working properly.

2. Receive "NTSC 4.43/3.58 COLOUR BAR" signal thru AV, press COLOUR SYSTEM key to select modes except N4.43/3.58, check the COLOUR is not working properly. Then, select the "NTSC 4.43/3.58" mode. Check again its colour so that it is working properly.

1. Receive "PAL COLOUR BAR" signal.

2. Turn up the volume control to maximum, make sure the sound is heard from the speakers. Then put the unit in no signal state.

3. Check the sound mute is effective.

4. Finally turn sound level of CTV to minimum.

7 NORMAL Key 1. Once in PICTURE Mode, and the NORMAL

key is pressed, all the settings will be present to normal setting. (Normal setting value for every mode).

» CONTRAST : MAX » COLOUR : CENTER » BRIGHTNESS : CENTER » TINT : CENTER » SHARPNESS : CENTER

8 White Temp 1. Receive "Monoscope Pattern" signal.

2. Set FUNCTION to select WHITE TEMP.

3. Press Volume Up/Down key to check WHITE TEMP Option, ST ANDARD: NORMAL SETTING, WARM for more REDDISH direction changing, COOL for more BLUISH direction changing.

10-1 10-2

Note:If nothing is display mean

contrast, colour, bright, tint or sharpness are all in normal setting.

11 OSD

LANGUAGE QUANTITY CHECK

Check OSD LANGUAGE quantity and type as English, Russian, Chinese, French, Arabic and Malay.

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