Hitachi CL2554AN Bedienungsanleitung

December 1999

No. 0105

CL2554AN

CL2854AN

SERVICE MANUAL

MANUEL D’ENTRETIEN

WARTUNGSHANDBUCH

CAUTION:

Before servicing this chassis, it is important that the service technician read

the “Safety Precautions” and “Product Safety Notices” in this service manual.

ATTENTION:

Avant d’effectuer l’entretien du châassis, le technicien doit lire les

«Précautions de sécurité» et les «Notices de sécuritédu produit» présentés

dans le présent manuel.

VORSICHT:

Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise“

und „Hinweise zur Produktsicherheit“in diesem Wartungshandbuch zu lesen.

Data contained within this Service

manual is subject to alteration for

improvement.

Les données fournies dans le

présent manuel d’entretien

peuvent faire l’objet de

modifications en vue de

perfectionner le produit.

Die in diesem Wartungshandbuch

enthaltenen Spezifikationen

können sich zwecks

Verbesserungen ändern.

Service manual CL2554AN / CL2854AN

- 1-

Contents

1 - Main features

1-1 Specifications

1-2 Channel table

1-3 ATSS sorting method

2 - Safety instruction

3 - Alignment instructions

3-1 Microcontroller configuration : Service mode

3-2 Microcontroller configuration : Option

3-3 TV set Alignment

4 - IC description

4-1 TDA936x TV signal processor - Teletext decoder with embedded m-Controller.

4-2 MSP3415D Multistandard Sound Processor

4-3 TDA894xJ Stereo Audio Amplifier

4-4 TDA835xJ Vertical Amplifier

4-4-1 TDA8357J

4-4-1 TDA8358J

4-5 TDA6107Q

4-6 24C08 8 Kbit EEPROM

4-7 STR - F6653

5 - Circuit description

5-1 Block diagram

5-2 IF

5-3 Source switching

5-4 m-Controller I/O pin configuration and function

5-5 Sound processing

5-6 Sound amplification

5-7 Vertical deflection

5-8 Power supply (STR F6653)

5-9 TV start-up, TV normal run and stand by mode operations

6 - Replacement parts list

Service manual CL2554AN / CL2854AN

- 2-

1-1 Specifications

TV standard PAL - SECAM B/G D/K, PAL I/I, SECAM L/L’

Sound system NICAM B/G, I, D/K, L,

FM 2Carrier B/G, D/K

Power consumption 21” : 49 W approx.

28” : 75 W approx.

Sound Output Power 21” : 4.5W x 2 (at 60% mod, 10%THD)

28” : 7W x 2 (at 60% mod, 10%THD)

Speaker 20”, 21” : 7W 8 ohm x2

25”, 28” : 12W 8 ohm x2

Teletext system 10 pages memory FASTEXT (FLOF or TOP)

Aerial input 75 ohm unbalanced

Channel coverage Off-air channels, S-cable channels and hyperband

Tuning system frequency synthesiser tuning system

Visual screen size 20” : 48 cm

21” : 51 cm

25” : 59 cm

28” : 66 cm

Channel indication On Screen Display

Program Selection 100 programmes

Aux. terminal EURO-SCART 1 : Audio / Video In and Out, R/G/B In, Slow and

Fast switching.

EURO-SCART 2 : Audio / Video In, SVHS In.

Audio-Video Jack on front of cabinet in common connection with

EURO-SCART 2.

Headphone jack (3.5 mm) on front of cabinet

Remote Control Unit R-40A01

21 Pin EURO-SCART 1 :

Pin Signal Description Matching value

1Audio Output Right 0.5 Vrms, Impedance < 1 kW, ( RF 54% Mod )

2Audio Input Right 0.5 Vrms, Impedance > 10 kW

3Audio Output Left 0.5 Vrms, Impedance < 1 kW, ( RF 54% Mod )

4Audio Earth

5Blue Earth

6Audio Input Left 0.5 Vrms, Impedance > 10 kW

7Blue Input 0.7 Vpp ±0.1V, Impedance 75W

8Slow Switching TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V ,

Impedance > 10 kW

9Green Earth

10 N.C.

11 Green Input 0.7 Vpp ±0.1V, Impedance 75W

12 N.C.

13 Red Earth

Service manual CL2554AN / CL2854AN

- 3-

14 Blanking Earth

15 Red Input 0.7 Vpp ±0.1V, Impedance 75W

16 Fast Switching 0 to 0.4V : Logic “0”, 1 to 3V : Logic “1”, Impedance 75W

17 Video Out Earth

18 Video In Earth

19 Video Output 1 Vpp ±3dB, Impedance 75W

20 Video Input 1 Vpp ±3dB, Impedance 75W

21 Common Earth

21 Pin EURO-SCART 2 :

Pin Signal Description Matching value

1N.C.

2Audio Input Right 0.5 Vrms, Impedance > 10 kW

3N.C.

4Audio Earth

5Earth

6Audio Input Left 0.5 Vrms, Impedance > 10 kW

7N.C.

8N.C.

9N.C.

10 N.C.

11 N.C.

12 N.C.

13 Earth

14 Earth

15 Chroma Input ±3dB for a luminance signal of 1 Vpp

16 N.C.

17 Earth

18 Video In Earth

19 N.C.

20 Video Input, Y In. 1 Vpp ±3dB, Impedance 75W

21 Common Earth

Service manual CL2554AN / CL2854AN

- 4-

1-2 Channel table

FREQUENCY TABLE

CH EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT

C01 46.25 47.75 (L') 45.75 49.75

C02 48.25 55.75 (L') 53.75 59.25

C03 55.25 60.5 (L') 61.75 77.25

C04 62.25 63.75 (L') 175.25 85.25

C05 175.25 176.00 183.25 93.25

C06 182.25 184.00 191.25 175.25

C07 189.25 192.00 199.25 183.25

C08 196.25 200.00 207.25 191.25

C09 203.25 208.00 215.25 199.25

C10 210.25 216.00 223.25 207.25

C11 217.25 189.25 (LUX) 231.25 215.25

C12 224.25 69.25 (L') 239.25 223.25

C13 53.75 76.25 (L') 247.25 -

C14 -83.25 (L') 49.75 -

C15 82.25 90.25 57.75 -

C16 -97.25 65.75 -

C17 183.75 -77.75 -

C18 192.25 -85.75 -

C19 201.25 - - -

C20 - - - -

C21 471.25 471.25 471.25 471.25

C22 479.25 479.25 479.25 479.25

C23 487.25 487.25 487.25 487.25

C24 495.25 495.25 495.25 495.25

C25 503.25 503.25 503.25 503.25

C26 511.25 511.25 511.25 511.25

C27 519.25 519.25 519.25 519.25

C28 527.25 527.25 527.25 527.25

C29 535.25 535.25 535.25 535.25

C30 543.25 543.25 543.25 543.25

C31 551.25 551.25 551.25 551.25

C32 559.25 559.25 559.25 559.25

C33 567.25 567.25 567.25 567.25

C34 575.25 575.25 575.25 575.25

C35 583.25 583.25 583.25 583.25

C36 591.25 591.25 591.25 591.25

C37 599.25 599.25 599.25 599.25

C38 607.25 607.25 607.25 607.25

C39 615.25 615.25 615.25 615.25

C40 623.25 623.25 623.25 623.25

C41 631.25 631.25 631.25 631.25

C42 639.25 639.25 639.25 639.25

C43 647.25 647.25 647.25 647.25

C44 655.25 655.25 655.25 655.25

C45 663.25 663.25 663.25 663.25

Service manual CL2554AN / CL2854AN

- 5-

C46 671.25 671.25 671.25 671.25

C47 679.25 679.25 679.25 679.25

C48 687.25 687.25 687.25 687.25

C49 695.25 695.25 695.25 695.25

C50 703.25 703.25 703.25 703.25

C51 711.25 711.25 711.25 711.25

C52 719.25 719.25 719.25 719.25

C53 727.25 727.25 727.25 727.25

C54 735.25 735.25 735.25 735.25

C55 743.25 743.25 743.25 743.25

C56 751.25 751.25 751.25 751.25

C57 759.25 759.25 759.25 759.25

C58 767.25 767.25 767.25 767.25

C59 775.25 775.25 775.25 775.25

C60 783.25 783.25 783.25 783.25

C61 791.25 791.25 791.25 791.25

C62 799.25 799.25 799.25 799.25

C63 807.25 807.25 807.25 807.25

C64 815.25 815.25 815.25 815.25

C65 823.25 823.25 823.25 823.25

C66 831.25 831.25 831.25 831.25

C67 839.25 839.25 839.25 839.25

C68 847.25 847.25 847.25 847.25

C69 855.25 855.25 855.25 855.25

C70 863.25 863.25 863.25 863.25

C71 69.25 - - -

C72 76.25 - - -

C73 83.25 - - -

C74 90.25 - - -

C75 97.25 - - -

C76 59.25 - - -

C77 93.25 - - -

S01 105.25 104.75 103.25 105.25

S02 112.25 116.75 111.25 112.25

S03 119.25 128.75 119.25 119.25

S04 126.25 140.75 127.25 126.25

S05 133.25 152.75 135.25 133.25

S06 140.25 164.75 143.25 140.25

S07 147.25 176.75 151.25 147.25

S08 154.25 188.75 159.25 154.25

S09 161.25 200.75 167.25 161.25

S10 168.25 212.75 -168.25

S11 231.25 224.75 -231.25

S12 238.25 236.75 -238.25

S13 245.25 248.75 255.25 245.25

S14 252.25 260.75 263.25 252.25

S15 259.25 272.75 271.25 259.25

S16 266.25 284.75 279.25 266.25

S17 273.25 296.75 287.25 273.25

S18 280.25 136.00 295.25 280.25

Service manual CL2554AN / CL2854AN

- 6-

S19 287.25 160.00 303.25 287.25

S20 294.25 - - 294.25

S21 303.25 303.25 -303.25

S22 311.25 311.25 311.25 311.25

S23 319.25 319.25 319.25 319.25

S24 327.25 327.25 327.25 327.25

S25 335.25 335.25 335.25 335.25

S26 343.25 343.25 343.25 343.25

S27 351.25 351.25 351.25 351.25

S28 359.25 359.25 359.25 359.25

S29 367.25 367.25 367.25 367.25

S30 375.25 375.25 375.25 375.25

S31 383.25 383.25 383.25 383.25

S32 391.25 391.25 391.25 391.25

S33 399.25 399.25 399.25 399.25

S34 407.25 407.25 407.25 407.25

S35 415.25 415.25 415.25 415.25

S36 423.25 423.25 423.25 423.25

S37 431.25 431.25 431.25 431.25

S38 439.25 439.25 439.25 439.25

S39 447.25 447.25 447.25 447.25

S40 455.25 455.25 455.25 455.25

S41 463.25 463.25 463.25 463.25

Service manual CL2554AN / CL2854AN

- 7-

1-3 ATSS sorting method

The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV

controlling software for each program checks if a VPS CNI code is transmitted. If no VPS CNI

code is found, the system check if a CNI code is transmitted in the teletext lines ( Packet 8/30

format 1 ). If such a code ( VPS or teletext ) is found and if this code is in the ATSS list, the

program is automatically named.

The programs found are then sorted in 4 groups :

Group I: It contains all the programs from the selected country and named by the TV

controlling software. Within this group the sorting order is fixed by the ATSS list.

Group II : It contains all the programs with a strong signal strength which are not listed in

group I.

Group III : It contains all the programs with a weak signal strength which are not listed in

group I.

Group IV : If two or more programs with the same code are found, only the strongest ( or if

they have the same level the one with the lowest frequency) is listed in group I, II or III. The

others are listed in group IV. Note : If two programs with the same name but a different code

are found these two programs are listed in group I, II or III ( e.g. Regional program SW3 in

Germany ).

The sorting order within group II, III, and IV is based on the channel frequency. The program

with the lowest frequency is allocated the first rank in its group, and so forth until the last

program of the group which has the highest frequency.

Program

number Group Skip

2Group I

...

n+1

... Group II

m+1

... Group III

p+1

... Group IV 4

q+1 not used

... 4

Program

number Group Skip

... Group II

m+1

... Group III

p+1

... Group IV 4

q+1 not used

... 4

Special case : Country selection = Others

Special case : France

If France is selected the TV controlling software sweeps the whole TV bands firstly with France

system selected ( positive video modulation) and secondly with Europe system selected ( negative

video modulation).

Service manual CL2554AN / CL2854AN

- 8-

Special case : Switzerland

If Switzerland is selected the TV controlling software sweeps the whole TV bands firstly with

Europe system selected (negative video modulation) and secondly with France system selected (

positive video modulation).

Special case : GB

Note for satellite receiver users : Before starting ATSS turn On your satellite receiver and tune “

SKY NEWS “.

If GB is selected the TV controlling software seeks for programs only in UHF ( C21 to C70). The

sorting order is :

1 - BBC1

2 - BBC2

3 - ITV

4 - CH4

5 - CH5

6 - NEWS

If two or more “ identical “programs ( same name but different code e.g. BBC1 and BBC1

Scotland ) are found the following programs in the list will be shifted up. (1 - BBC1, 2 - BBC1, 3

- BBC2, 4 - ITV, 5 - CH4, 6 - CH5, 7 - NEWS, ..)

If one of the program above is not found, the associated program number remains empty

(freq.=467.25 Mhz - Skip selected - no name - system=GB).

example A : 1 - BBC1, 2 - BBC2, 3 - ITV, 4 - -----, 5 - CH5, 6 - NEWS, ...

example B ( if 2 BBC1 found ) : 1 - BBC1, 2 - BBC1, 3 - BBC2, 4 - ITV, 5 - -----, 6 - CH5, 7 -

NEWS, ...

Service manual CL2554AN / CL2854AN

- 9-

2 - Safety instruction

WARNING: Only competent service personnel may carry out work involving the testing or repair

of this equipment.

X-RAY RADIATION PRECAUTION

1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid

such hazards, the high voltage must not exceed the specified limit. The nominal value of the

high voltage of this receiver is 25-26 KV (20”-21”) or 26 KV (25” - 28”) at max beam

current. The high voltage must not, under any circumstances, exceed 27.5 KV (20”), 29KV

(21”), 29.5 KV (25") or 30 KV (28"). Each time a receiver requires servicing, the high

voltage should be checked. It is important to use an accurate and reliable high voltage meter.

2. The only source of X-RAY Radiation in this TV receiver is the picture tube. For continued

X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as

specified in the parts list.

SAFETY PRECAUTION

1. Potentials of high voltage are present when this receiver is operating. Operation of the

receiver outside the cabinet or with the back board removed involves a shock hazard from the

receiver.

1) Servicing should not be attempted by anyone who is not thoroughly familiar with the

precautions necessary when working on high voltage equipment.

2) Discharge the high potential of the picture tube before handling the tube. The picture tube

is highly evacuated and if broken, glass fragments will be violently expelled.

2. If any Fuse in this TV receiver is blown, replace it with the FUSE specified in the

Replacement Parts List.

3. When replacing a high wattage resistor (oxide metal film resistor) in circuit board, keep the

resistor 10 mm away from circuit board.

4. Keep wires away from high voltage or high temperature components.

5. This receiver must operate under AC 230 volts, 5O Hz. NEVER connect to DC supply or

any other power or frequency.

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this equipment have special safety-related characteristics.

These characteristics are often passed unnoticed by a visual inspection and the X-RAY

RADIATION protection afforded by them cannot necessarily be obtained by using replacement

components rated for higher voltage, wattage, etc. Replacement parts which have these special

safety characteristics are identified in this manual and its supplements, electrical components

having such features are identified by designated symbol on the parts list. Before replacing any of

these components, read the parts list in this manual carefully. The use of substitutes replacement

parts which do not have the same safety characteristics as specified in the parts list may create X-

RAY Radiation.

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