Erisson H2163 Schematic

FILE NO. SM-CTV-G-036

COLOR TELEVISION

SERVICE MANUAL

MODEL NO. H2163,PF2163,H2165,PF2165

CHASSIS NO. CH-16CA

Please read this manual carefully before service.

SERVICE MANUAL

TABLE OF CONTENTS

SAFETY INSTRUCTIONS AND MAINTENANCE

X-Ray Radiation Precaution...............................................................................................1

Safety Precaution ................................................................................................................1

Product Safety Notice .........................................................................................................2

Maintenance.......................................................................................................... 3

KEY ICS AND ASSEMBLIES..................................................................................4

SYSTEM BLOCK DIAGRAMS............................................................................... 5

Structure Block Diagram.....................................................................................................5

Block Diagram for Supply Voltage System .....................................................................6

SERVICE DATA................................................................................................................7

.....................................1

Technical Data of Key ICs ..................................................................................................7

Service Data of Key ICs .....................................................................................................18

Waveforms of Key Points...................................................................................................23

ADJUSTMENTS ..............................................................................................................29

Set-up Adjustments..............................................................................................................29

Circuit Adjustments..............................................................................................................31

Service Mode and Bus Data..............................................................................................33

APPENDIX

Circuit Diagrams

Exploded View

SERVICE MANUAL

SAFETY INSTRUCTIONS AND MAINTENANCE

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAUTION” AND “PRODUCT SAFETY NOTICE INSTRUCTIONS BELOW.

”

X-RAY RADIATION PRECAUTION

1. The EHT must be checked every time the TV is serviced to ensure that the CRT does not emit

X-ray radiation as result of excessive EHT voltage. The maximum EHT voltage permissible in

any operating circumstances must not exceed the rated value. When checking the EHT, use

the High Voltage Check procedure in this manual using an accurate EHT voltmeter.

2. The only source of X-RAY radiation in this TV is the CRT. The TV minimizes X-RAY radiation,

which ensures safety during normal operation. To prevent X-ray radiation, the replacement

CRT must be identical to the original fitted as specified in the parts list.

3. Some components used in this TV have safety related characteristics preventing the CRT

from emitting X-ray radiation. For continued safety, replacement component should be made

after referring the PRODUCT SAFETY NOTICE below.

4. Service and adjustment of the TV may result in changes in the nominal EHT voltage of the

CRT anode. So ensure that the maximum EHT voltage does not exceed the rated value after

service and adjustment.

SAFETY PRECAUTION

WARNING: REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY.

1. The TV has a nominal working EHT voltage. Extreme caution should be exercised when

working on the TV with the back removed.

1.1 Do not attempt to service this TV if you are not conversant with the precautions and

procedures for working on high voltage equipment.

1.2 When handling or working on the CRT, always discharge the anode to the TV chassis before

removing the anode cap in case of electric shock.

1.3 The CRT, if broken, will violently expel glass fragments. Use shatterproof goggles and take

extreme care while handling.

1.4 Do not hold the CRT by the neck as this is a very dangerous practice.

2. It is essential that to maintain the safety of the customer all power cord forms be replaced

exactly as supplied from factory.

3. Voltage exists between the hot and cold ground when the TV is in operation. Install a suitable

isolating transformer of beyond rated overall power when servicing or connecting any test

equipment for the sake of safety.

SERVICE MANUAL

4. When replacing ICs, use specific tools or a static-proof electric iron with small power (below

35W).

5. Do not use a magnetized screwdriver when tightening or loosing the deflection yoke assembly

to avoid electronic gun magnetized and decrement in convergence of the CRT.

6. When remounting the TV chassis, ensure that all guard devices, such as nonmetal control

buttons, switch, insulating sleeve, shielding cover, isolating resistors and capacitors, are

installed on the original place.

7. Replace blown fuses within the TV with the fuse specified in the parts list.

8. When replacing wires or components to terminals or tags, wind the leads around the terminal

before soldering. When replacing safety components identified by the international hazard

symbols on the circuit diagram and parts list, it must be the company-approved type and must

be mounted as the original.

9. Keep wires away from high temperature components.

PRODUCT SAFETY NOTICE

CAUTION: FOR YOUR PROTECTION, THE FOLLOWING PRODUCT SAFETY NOTICE SHOULD BE READ CAREFULLY BEFORE OPERATING AND SER VICING THIS TV SET.

1. Do not slap or beat the cabinet or CRT, since this may result in fire or explosion.

2. Never allow the TV sharing a plug or socket with other large-power equipment. Doing so may

result in too large load, thus causing fire.

3. Do not allow anything to rest on or roll over the power cord. Protect the power cord from being

walked on, modified, cut or pinched, particularly at plugs.

4. Do not place any objects, especially heavy objects and lightings, on top of the TV set. Do not

install the TV near any heat sources such as radiators, heat registers, stove, or other

apparatus that produce heat.

5. Service personnel should observe the SAFETY INSTRUCTIONS in this manual during use

and servicing of this TV set. Otherwise, the resulted damage is not protected by the

manufacturer.

6. Many electrical and mechanical components in this chassis 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

replacements rated at higher voltages or wattage, etc. Components which have these special

safety characteristics in this manual and its supplements are identified by the international

hazard symbols on the circuit diagram and parts list. Before replacing any of these

components read the parts list in this manual carefully. Substitute replacement components

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

X-ray radiation.

SERVICE MANUAL

Safety Symbol Description

The lightning symbol in the triangle tells you that the voltage inside this product may

be strong enough to cause an electric shock. Extreme caution should be exercised

when working on the TV with the back removed.

This is an international hazard symbol, telling you that the components identified by

the symbol have special safety-related characteristics.

FDA This symbol tells you that the critical components identified by the FDA marking have

special safety-related characteristics.

UL This symbol tells you that the critical components identified by the UL marking have

special safety-related characteristics.

MAINTENANCE

1. Place the TV set on a stable stand or base that is of adequate size and strength to prevent it

from being accidentally tipped over, pushed off or pulled off. Do not place the set near or over

a radiator or heat register, or where it is exposed to direct sunlight.

2. Do not install the TV set in a place exposed to rain, water, excessive dust, mechanical

vibrations or impacts.

3. Allow enough space (at least 10cm) between the TV and wall or enclosures for proper

ventilation.

4. Slots and openings in the cabinet should never be blocked by clothes or other objects.

5. Please power off the TV set and disconnect it from the wall immediately if any abnormal

condition are met, such as bad smell, belching smoke, sparkling, abnormal sound or no

picture/sound/raster. Hold the plug firmly when disconnecting the power cord.

6. Unplug the TV set from the wall outlet before cleaning or polishing it. Use a dry soft cloth for

cleaning the exterior of the TV set or CRT screen. Do not use liquid cleaners or aerosol

cleaners.

SERVICE MANUAL

KEY ICS AND ASSEMBLIES

Table 1 Key ICs and Assemblies

Serial

Position Model No. Function Description

No.

OM8370PS/N3/A

1 N105

(CH05T1629)

2 N101 AT24C16 EEPROM

UOC

3 N106 TDA9859 Audio processor

4 N401 TDA8356 Vertical output circuit

5 N807 TDA8944J Sound power amplifier

6 A100 TDQ-6F2-M Tuner

7 N802 STR-G5653 Power supply circuit

SERVICE MANUAL

(

)

(

)

SYSTEM BLOCK DIAGRAMS

Structure Block Diagram

Remote

110-220V

50/60Hz

Power Supply Circuit

STR-G5653 (N802) and

BCK-24017L (T803)

Fig.1 Structure Block Diagram for CH-16CA Chassis

control

Tuner

A100

Remote Sensor

HS0038

Circuit for Buttons

On The TV

IF Pre-Amplifier

+ SAWF

Y C

Audio Processor

TDA9859

3.3V Small Signal Processor & MCU

I2C BUS

EEPROM

N101

H.Drive

V501, FL501

V.OUT

TDA8356 (N401)

H.OUT

V502

OM8370PS/N3/A (N105)

UOC

2 IN 1IC

CRT Drive

TV-S

N106

I2C

BUS

Y Pb Pr

Audio Amplifier

TDA8944J(N807)

Monitor Out

L R

12V

115V

12V-S

5V-1

HV FV SV

FBT

T501

200V

45V

16V

5V-2

SERVICE MANUAL

Block Diagram for Supply Voltage System

C801,

C802

T802,

110-220V

50/60Hz

FU001,

T801,

Circuit

Formed of

Interferen

ce proof

CN802

Formed of

TH801 and

Degaussing

Circuit

Fig. 2 Block Diagram for Supply Voltage System for CH-16CA Chassis

Bridge

Rectifier

Formed of

D802~D8

05, and

C803~C8

(N802)

STR-

G5623

n and

control

Power

Regulatio

(T803)

Switch

Transform

er BCK-

24013L

115V

12V-S

3.3V

V652

EEPROM REM PCB EHT Limiter Formed of

5V-1

OM8370 (N105)

200V

CRT RGB PCB

T501

TDA8944J (N807)

16V

Vertical Out Circuit

5V-2

OM8370 (N105)

TDA9859 (N106)

FBT

Tuner A100

COMB PCB

Key PCB

V651

CRT RGB PCB

Tuner A100

Q506,

etc.

QB02, QB04, QB05

V107, V221, V213,

V305,V805, V808,

SERVICE MANUAL

SERVICE DATA

Technical Data of Key ICs

UOC OM837X (N105)

1. General Description

The various versions of the OM837X PS/N3

series combine the functions of a video

processor together with a μ-Controller and

US Closed Caption decoder. The ICs are

intended to be used in economy television

receivers with 90° and 110° picture tubes.

The ICs have supply voltages of 8 V and 3.3V

and they are mounted in an S-DIP 64

envelope.

The features are given in the following feature

list.

2. Features TV-signal processor

• Multi-standard vision IF circuit with

alignment-free PLL demodulator

• Internal (switchable) time-constant for the

IF-AGC circuit

• A choice can be made between versions with

mono intercarrier sound FM demodulator and

versions with QSS IF amplifier.

• The mono intercarrier sound versions have a

selective FM-PLL demodulator which can be

switched to the different FM sound

frequencies (4.5/5.5/6.0/6.5 MHz).

The quality of this system is such that the

external band-pass filters can be omitted.

• Source selection between ‘internal’ CVBS and

external CVBS or Y/C signals

• Integrated chrominance trap circuit

• Integrated luminance delay line with

adjustable delay time

• Picture improvement features with peaking

(with variable positive/negative overshoot

ratio), black stretching and Dynamic Skin

Tone Control

• Integrated chroma band-pass filter with

switchable centre frequency

• Only one reference (12 MHz) crystal

required for the μ-Controller, Teletext and

the colour decoder

• PAL/NTSC colour decoder with automatic

search system

• Internal base-band delay line

• RGB control circuit with ‘Continuous Cathode

Calibration’, white point and black level offset

adjustment so that the color temperature of

the dark and the light parts of the screen can

be chosen independently.

• Linear RGB or YUV input with fast blanking

for external RGB/YUV sources. The

Text/OSD signals are internally supplied from

theμ-Controller/Teletext decoder

• Contrast reduction possibility during

mixed-mode of OSD and Text signals

• Horizontal synchronization with two control

loops and alignment-free horizontal oscillator

• Vertical count-down circuit

• Vertical driver optimized for DC-coupled

vertical output stages

• Horizontal and vertical geometry processing

• Horizontal and vertical zoom function for 16 :

9 applications

• Horizontal parallelogram and bow correction

for large screen picture tubes

• Low-power start-up of the horizontal drive

circuit

4. Block Diagrams

SERVICE MANUAL

5. Refer to Table 2 about Functions and Service Data of the IC’s Pins.

SERVICE MANUAL

EEPROM A T24C16 (N101)

1. Features

·Low Voltage and Standard Voltage Operation

5.0 (V

2.7 (V

2.5 (V

1.8 (V

= 4.5V to 5.5V)

= 2.7V to 5.5V)

= 2.5V to 5.5V)

= 1.8V to 5.5V)

·Internally Organized 128 x 8 (1K), 256 x 8 (2K),

512 x 8 (4K),1024 x 8 (8K) or 2048 x 8 (16K)

·2-Wire Serial Interface

·Bidirectional Data Transfer Protocol

·100 kHz (1.8V, 2.5V, 2.7V) and 400 kHz (5V)

Compatibility

·Write Protect Pin for Hardware Data Protection

·8-Byte Page (1K, 2K), 16-Byte Page (4K, 8K,

16K) Write Modes

·Partial Page Writes Are Allowed

·Self-Timed Write Cycle (10 ms max)

·High Reliability

Endurance: 1 Million Cycles

Data Retention: 100 Years

·Automotive Grade and Extended Temperature

Devices Available

·8-Pin and 14-Pin JEDEC SOIC and 8-Pin PDIP

Packages

2. Description

The AT24C01A/02/04/08/16 provides

1024/2048/4096/8192/16384 bits of serial

electrically erasable and programmable read

only memory (EEPROM) organized as

128/256/512/1024/2048 words of 8 bits each.

The device is optimized for use in many

industrial and commercial applications where low

power and low voltage operation are essential.

The AT24C01A/02/04/08/16 is available in space

saving 8-pin PDIP, 8-pin and 14-pin SOIC

packages and is accessed via a 2-wire serial

interface. In addition, the entire family is

available in 5.0V (4.5V to 5.5V), 2.7V (2.7V to

5.5V), 2.5V (2.5V to 5.5V) and 1.8V (1.8V to

5.5V) versions.

Pin Configurations

3. Block Diagram

SERVICE MANUAL

Fig. 6

4. Refer to Table 3 about Functions and Data of the IC’s Pins.

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