Hitachi C21-FL21F Service Manual

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9

HCPT

No. 006E

HITACHI

CODE : - 051/081/081S/ 19*/98*/433/751

SERVICE MANUAL

V3AR Chassis

NOTE : To ensure the safety of customer, special protection circuitry is added to avoid failures due to abnormal

commercial input voltage from power line which excess the maximum operation range of AC 264V.

The special protection circuitry activate approximately at AC 300V by cutting off main fuse F901.

Hence to prevent serious failures, such as smoke, fire etc…

CAUTION :

CONTENTS

SAFETY PRECAUTIONS ...……………………………………………………………… PRODUCT SAFETY NOTICE …………...………………………………………………. REMOTE CONTROL UNIT ……………………………………………………………… GENERAL OPERATIONS GUIDE .………………………………………………………. FAILURE DETECTING FUNCTION OF MAIN DEVICES ………………….………….. CIRCUIT DESCRIPTION …………………………………………………………… 6 - 1 ADJUSTMENT INSTRUCTIONS …………………………………………………. 11 - 1 REPLACEMENT PARTS LIST …………………………………………………….. 20 - 31

Before servicing this chassis, it is important that the service techician reads the " Safety Precaution " and " Product Safety Notices " in this Service Manual. * Enclosed with Circuit Diagram and Printed Wiring Board.

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

COLOR TELEVISION

MARCH 2002 Hitachi Consumer Products ( THAILAND ) , Ltd.

HITACHI

C21-FL21F HITACHI LTD. AV SYSTEMS

FEATURES

FULL FUNCTION REMOTE CONTROL

*

PRESET TUNING ( VOLTAGE SYNTHESIZER - AUTO PRESET, MANUAL , FINE )

*

HYPERBAND TUNER

*

AVL ( AUTO VOLUME LEVELLING)

*

CHANNEL SKIP

*

BLUE BACK

*

AUTO OFF

*

ON / OFF/ ALARM TIMER ( 0:00 - 24:00 )

*

MULTI LANGUAGE OSD

*

NR (NOISE REDUCTION)

*

AV STEREO

*

SPECIFICATIONS

SCREEN SIZE 21 INCH 90 DEG. DEF. CHASSIS V2

RF: B/G/D/K/H/I-PAL,

RECEPTION SYSTEM ( FULL MULTI )

FREQUENCY COVERAGE

PRESETTING PROGRAMME NO. PROGRAMME UP / DOWN AND SELECTION AUDIO OUTPUT 5 W + 5 W ( MAX ) SPEAKER SIZE ( 5 x 9 cm ) X 2 POWER SUPPLY AC 100 ~ 264 V / 50Hz,60Hz

POWER PLUG CEE POWER CONSUMPTION AERIAL INPUT 75 OHM COAXIAL CONTROL - REMOTE BLUE BACK ON / OFF OPERATION - MANUAL TERMINALS

* TV OUT

B/G/D/K/K'/I-SECAM,M-NTSC

VIDEO: NTSC3.58 - 5.5/6.0/6.5,

NTSC4.43 - 5.5/6.0/6.5,

NTSC50,PAL60,SECAM60

44-863 MHz

100

RANDOM ACCESS

( USABLE RANGE )

89 W

VIDEO IN * VIDEO OUT AUDIO IN * AUDIO OUT

2

1

2 1

OSD ENGLISH,CHINESE,MALAY,

RUSSIAN CABINET STYLING TABLE CABINET MATERIALS PLASTIC HANDLE YES (SCOOP)

TV-SET DIMENSION (mm)

PACKAGE DIMENSION (mm)

N.WEIGHT ( kg ) 21.6 G.WEIGHT ( kg ) 24.6 20 FT CONTAINER 40 FT CONTAINER 45 FT CONTAINER REMOTE CONTROL MENU FUNCTION PRESET TUNING

605x489x448 (W x L x H)

660x545x533 (W x L x H)

136 SETS

304 SETS

340 SETS

PROGRAMME SELECTION

TV / VIDEO

PICTURE CONTROL

SOUND CONTROL

VOLUME CONTROL

MUTE

PICTURE AND SOUND MEMORY

NOISE REDUCTION

AUTO OFF ON / OFF

TIMER ( ON,OFF,ALARM )

STANDBY ON/OFF

RECALL

CHANNEL SKIP PRESET

SPECIFICATION ARE SUBJECT TO CHANGE WITHOUT NOTICE.

HITACHI

C21-FL21M HITACHI LTD. AV SYSTEMS

FEATURES

FULL FUNCTION REMOTE CONTROL

*

PRESET TUNING ( VOLTAGE SYNTHESIZER - AUTO PRESET, MANUAL , FINE )

*

HYPERBAND TUNER

*

AVL ( AUTO VOLUME LEVELLING)

*

CHANNEL SKIP

*

BLUE BACK

*

AUTO OFF

*

ON / OFF/ ALARM TIMER ( 0:00 - 24:00 )

*

MULTI LANGUAGE OSD

*

NR (NOISE REDUCTION)

*

AV STEREO

*

SPECIFICATIONS

SCREEN SIZE 21 INCH 90 DEG. DEF. CHASSIS V2

RF: B/G/D/K/H/I-PAL,

RECEPTION SYSTEM ( MULTI )

FREQUENCY COVERAGE

PRESETTING PROGRAMME NO. PROGRAMME UP / DOWN AND SELECTION AUDIO OUTPUT 5 W + 5 W ( MAX ) SPEAKER SIZE ( 5 x 9 cm ) X 2 POWER SUPPLY AC 100 ~ 264 V / 50Hz,60Hz

POWER PLUG CEE POWER CONSUMPTION AERIAL INPUT 75 OHM COAXIAL CONTROL - REMOTE OPERATION - MANUAL TERMINALS

* TV OUT

B/G/D/K/K'/I-SECAM

VIDEO: NTSC3.58 - 5.5/6.0/6.5,

NTSC4.43 - 5.5/6.0/6.5,

NTSC50,PAL60,SECAM60

44-863 MHz

100

RANDOM ACCESS

( USABLE RANGE )

89 W

VIDEO IN * VIDEO OUT AUDIO IN * AUDIO OUT

2

1

2 1

OSD ENGLISH,CHINESE,MALAY,

RUSSIAN CABINET STYLING TABLE CABINET MATERIALS PLASTIC HANDLE YES (SCOOP)

TV-SET DIMENSION (mm)

PACKAGE DIMENSION (mm)

N.WEIGHT ( kg ) 21.6 G.WEIGHT ( kg ) 24.6 20 FT CONTAINER 40 FT CONTAINER 45 FT CONTAINER REMOTE CONTROL MENU FUNCTION PRESET TUNING

605x489x448 (W x L x H)

660x545x533 (W x L x H)

136 SETS

304 SETS

340 SETS

PROGRAMME SELECTION

TV / VIDEO

PICTURE CONTROL

SOUND CONTROL

VOLUME CONTROL

MUTE

PICTURE AND SOUND MEMORY

NOISE REDUCTION

BLUE BACK ON / OFF

AUTO OFF ON / OFF

TIMER ( ON,OFF,ALARM )

STANDBY ON/OFF

RECALL

CHANNEL SKIP PRESET

SPECIFICATION ARE SUBJECT TO CHANGE WITHOUT NOTICE.

CONTROLS

L

FRONT PANE

REMOTE CONTROL UNIT

CONTROLS

L

REMOTE CONTROL UNIT

FRONT PANE

SAFETY PRECAUTIONS

WARNING: The following precautions should be

opserved.

1. Do not install , remove, or handle the picture tube in could produce X-radiation moderately in excess of de any manner unless shatter proof goggles are worn. sign levels. The high voltage must not, under any cir People not so equipped should be kept away while cumstances, exceed 34kV on the chassis. picture tubes are handled. Keep picture tube away from the body while handing.

2. When service is required, an isolation transformer receiver is the picture tube. The tube utilized for the should be inserted between power line and the above mentioned function in this chassis is specially receiver before any service is performed on the constructed to limit X - radiatuion. chassis. For continued X-radiation protection, replace tube with

3. When replacing the chassis in the cabinet,ensure all the protective devices are put back in place,such as barriers, non - metallic knobs, adjustment or compartment covers or shields, isolation resistors/ Many electrical and mechanical parts in HITACHI capacitors, etc. television receiver have special safety related

4. When service is required, observe the original lead evident from visual inspection, nor can be protection dressing. Extra precaution should be taken to afforded by them necessarily be obtained by using

assure correct lead dressing in the high voltage

circuitry area. Particularly note the R. G. B. lead wattage, etc. Replacement parts which have these dressing. Ensure they are dressed well away from special safety characteristics are identified by marking the horizontal scan and F.B.T. circuitry. with a on the schematics and replacement

5. Always use the manufacturer ' s replacement component. Always replace original spacers and safety characteristics as the HITACHI recommended maintain lead lengths. Especially critical components replacement one, shown in the parts list in this Service are indicated thus on the parts list and Manual, may create electrical shock, fire, X - radiation, should not be replaced by other makes. Furthermore, where a short circuit has occurred, replace those components that indicate evidence of Product Safety is continuously under review and new overheating. instructions are issued from time to time. For the latest

6. Before returning a serviced receiver to the customer, Manual. A subscription to ,or additional copies of the service technician must thoroughly test the unit HITACHI Service Manuals may be obtained at a nominal to be certain that it is completely safe to operate charge from your HITACHI sales offices. without danger of electrical shock, and be sure that no protective device built into the instrucment by the manufacturer has became defective, or inadvertenly The line output stage can develop voltages in excess damaged during servicing. Therefore, the following of 25kV; if the E.H.T cap is required to be removed, checks are recommended for the continued discharge the anode cap to chassis via a high value protection of the customers and service techninians. resistor, prior to its removal from the tube.

HIGH VOLTAGE

High voltage should always be kept at the rated value of the chassis and no higher. Operating at higher voltages may cause a failure of the picture tube or high voltage supply, and also, under certain circumstances

X-RADIATION

TUBES : The primary source of X - radiation in this

the same type as the original, HITACHI approved type.

PRODUCT SAFETY NOTICE

characteristics. These characteristics are often not

replacement components rated for higher voltage,

parts list in this Service Manual.The use of a substitute

replacement component which does not have the same

or other hazards.

information,always consult the current HITACHI Service

TUBE DISCHARGE

INSULATION

Insulation resistantce should not be less than 7 MΩ at 500 V DC between the mains poles and any accessible metal parts. Also, no flashover or breakdown should occur during the dielectric strength test, applying 3kV AC or 4.25kV DC for two seconds between the main

poles and accessible metal parts.

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REMOTE CONTROL UNIT

FOR OTHER MODELS FOR T/TEXT MODELS ONLY

1. 9.

INPUT SELECTOR

2. 10.

VOLUME UP/DOWN

3. 11.

PROGRAMME UP/DOWN

4. 12.

RECALL

5. 13.

SURROUND SOUND

6. 14.

MENU

7. 15.

TIMER

8. 16.

PICTUREPOWER ON/OFF SWITCH

SOUND

FM (NOT USING)

MUTE

CHI/II (FOR NICAM/A2 MODELS)

PROGRAMME SELECTOR (DIRECT KEY)

CURSOR

T/TEXT FUNCTION KEY (T/TEXT MODELS ONLY)

- 3 -

GENERAL OPERATIONS GUIDE

With this set, all adjustments/settings are performed by selecting from menu screens. Different menu screens and details of adjustments/settings are shown below. To access the menu screen, press the MENU button, then select the item by pressing the left/right cursor buttons.

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FAILURE DETECTING FUNCTION OF MAIN DEVICES

r

2

9

x

In V3AR ,failure of Main devices can detect by the blinking indication of LED at front panel.

( Example : LED blinking time is 2 in cycle I002 is out of order. )

If an IIC error occurred, the LED, D001 blinks at 1Hz, 50% duty cycle.

The blinking times are as below.

Failure Device

EEPROM, AT24C04

UOC, TDA935x/6x/8

Audio Processor, TDA985

PLL Tuner, TUHAF4EG - 775F

Table 3. Error LED blinking times

EEPROM

CCT.No.I002 [AT24C04]

V/C/J TV Processo

CCT.No.I001 [TDA9381/86/65]

ON

OFF

ON

OFF

CCT.No.

IA01

U001

IN01

Bus Error LED Blinking Time

2I002

3I001

4

5

6NICAM, MSP3415D / MSP3417D

HiFI Audio Processor

CCT.No. IA01 [TDA9859]

PLL Tuner

CCT.No. U001 [TUHAF4EG - 775F2]

SOUND DECODER / DEMODULATOR

CCT. No. IN01 [MSP3415 / MSP3417]

Figure 1. Error LED blinking times

ON

OFF

ON

OFF

ON

OFF

2S 0.5S

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CIRCUIT DESCRIPTION

V

t

r

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y

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A

d

r

)

d

r

t

V

t

V

A

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w

A

r

A

Selection and CPU circuitry

IC type, TDA9381/86/65 performs functions like IIC controls, channel selection, on-screen display ,search

tuning, systems selection amongst others. The pin's functions of TDA9381/86/65 are presented in the table shown

below.

numbe

1

2

Signal

name mode

Powe

SCL

3SD

4

5

6

Alarm

SAW S

AV S-DET

SW FE/A

7

8

9

10

11

Key - In

V2/V1

VSSC/P

Led

ON/OFF Mute

I/O

Outpu

I/O

Outpu

Inpu

Outpu

Inpu

Outpu

-

Outpu

Configuration

P.P. 3.3

O.D. 5

O.D. 3.3

H.I. 5

O.D. 5

H.I. 3.3

O.D. 3.3

-

O.D. 3.3

Function

0 = Stand-by, 1 = On

Clock of main I

Data of main I

2

C - bus

2

C - bus

PWM output for Beep sound

1 = M, 0 = Others

Detect for S-VHS (not mono chassis

FE/AV switch (mono chassis)

Local analogue keyboar

1 = Video:2, 0 = Video:1

Digital ground for µ-controller core and peripher

LED Drive

1 = Mute on, 0 = Mute off (Under Standby

12

13

14

15

16

17

18

19

20

21

VSS

SECPLL

VP2

DECDIG

PH2LF

PH1LF

T

DECBG

AVL/EWD

VDRB

22 VDR

23 IFIN1

24 IFIN2

-

Outpu

Inpu

-

nalog ground of Teletext decoder and digital groun

of TV-processo

-

-Inpu

SECAM PLL decoupling

nd

2

supply voltage TV-processor (+8V)

Decoupling digital supply of TV-processo

Phase-2 filte

Phase-1 filte

Ground 3 for TV-processo

Bandgap decoupling

East-West drive outpu

Vertical drive B outpu

Vertical drive A outpu

IF input 1

- IF input 2

- 6 -

t

r

Pin Signal

t

r

t

A

r

t

r

t

A

y

e

t

r

t

A

t

numbe

Configuration

I/O

name mode

Function

25 IREF Inpu 26 VSC - Vertical sawtooth capacito 27 AGCOUT Outpu

-

28 AUDEEM Outpu 29 DECSDEM - Decoupling sound demodulato 30 GND2 - Ground 2 for TV processo 31 SNDPLL - Narrow band PLL filte 32 REFO Outpu 33 HOUT Outpu 34 FBISO Inpu 35 AUDEXT Inpu 36 EHTO Inpu

-

37 PLLIF - 38 IFOu

Outpu

39 +8v - -

Reference current inpu

Tuner AGC outpu

udio deemphasis-

Subcarrier reference outpu Horizontal outpu Flyback inpu External audio inpu EHT/overvoltage protection inpu IF-PLL loop filte IF video output / selected CVBS outpu

Main supply voltage TV-processor (+8V) 40 CVBSINT Inpu 41 GND1 _ 42 CVBS/Yin Inpu 43 Cin Inpu 44 AUDOUT Outpu 45 INSSW2 - 46 R2/VIN - 47 G2/YIN - 48 B2/UIN - 49

BCLIN Inpu 50 BLKIN Inpu 51 52 53 54

RO Outpu GO Outpu BO Outpu

VDD

--Analog supply of Teletext decoder and digital suppl

- Internal CVBS inpu Ground 1 for TV-processo

-

External CVBS/Y inpu Chrominance input (SVHS)

udio outpu No connection No connection No connection No connection

-

Beam current limiter input/V-guard inpu

- Black curren

-

Red OSD outpu Green OSD outpu Blue OSD outpu

of TV-processor (3.3 V)

55

VPE - - OTP Programming Voltag

- 7 -

r

Pin Signal

)

y

t

g

V

t

)

t

numbe

Configuration

I/O

name mode

Function

56 VDDC - -

Digital supply to core (3.3V

57 OSDGND - - Oscillator ground suppl

58 XTA/IN Inpu

59 XTA/OUT Outpu

60 RESET Inpu

61 VDDP - -

62 SCL(EEP) I/O

63 SDA(EEP)

I/O

64 RC-In Inpu

Note 1 : Abbreviation of pin configulation mode : O.D. Open Drain

O.D. 3.3V

O.D.

H.I.

-

Crystal Oscillator inpu

Crystal Oscillator outpu

Rese

Digital supply to periphery (+3.3 V

2

C-bus for EEPROM

2

C-bus for EEPROM

3.3V

3.3

Clock of secondary I

Data of secondary I

Input for Remote control decodin

Q.B. Quasi-Bidirectional

H.I. High-Impedance

P.P. Push-Pull

Note 2 : During reset all pins are Quasi-Bidirectional mode.

Tuner and IF

The Tuner (U001)used on V3AR chassis is powered up by the 5V supply. It is IIC bus controlled and covers VHF, UHF,

CATV Band (Mid, super, and hyper).

The IF output from Tuner ( pin 11 of U001) is applied to the amplifier Q201.

For multi-system model with M-NTSC, switchable saw filter is used. Q001 at pin 2 of X003 servers to select the IF

signal between M/N mode to other modes ( e.g. B/G, D/K ) before demodulation is carried out at I001.

i.e. at M mode: Base of Q001 High

I001 (TDA9381/9386/9365) besides begin the microcontroller, incorperates video / chroma / deflections /

teletext features and video/audio switching. It performs auto color identification of PAL/SECAM/NTSC, sync

separation , AFC, HV oscillator and output RGB signals.

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