Erisson 21F1, 2102, 2915 Schematics

Contents

I. Safety Instructions .................................................................................................................................. 2

II. Specifications ......................................................................................................................................... 4

III. Level List of Equipments & Instruments Required for Production ................................................ 6

IV. Applying Adhesive on Main PCB ........................................................................................................ 6

V. Wiring Diagram...................................................................................................................................... 9

VI. Block Diagram.................................................................................................................................... 13

VII. Disassembly........................................................................................................................................ 15

VIII. Input Signals & Equipments List for Alignment ........................................................................... 15

IX. E2PROM (IC602) Setting .................................................................................................................... 16

X. Electrical Adjustment .......................................................................................................................... 19

XI. Transistor and IC Identification ......................................................................................................... 28

XII. Schematic Diagram ............................................................................................................................ 29

XIII. Component Diagrams ....................................................................................................................... 30

XIV. Assembly Instruction...................................................................................................................... 36

A. Front cabinet block .............................................................................................................................. 36

B. CRT block ........................................................................................................................................... 37

C. Assembly of chassis block .................................................................................................................. 38

D. Whole unit without rear cabinet block .................................................................................................40

E. Rear cabinet block .............................................................................................................................. 41

XV. Packing ............................................................................................................................................... 42

XVI. Exploded View Diagram and Parts List ......................................................................................... 43

A. TV unit ................................................................................................................................................ 43

B. Remote handset unit ........................................................................................................................... 46

I. Safety Instructions

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY.

PRECAUTIONS DURING SERVICING

1. In addition to safety, other parts and assemblies are specified for conformance with such regulations as those applying to spurious radiation. These must also be replaced only with specified replacements. Examples: RF converters, tuner units, antenna selection switches, RF cables, noise-blocking capacitors, noise-blocking filters, etc.

2. Use specified internal Wiring. Note especially:

1) Wires covered with PVC tubing

2) Double insulated wires

3) High voltage leads

3. Use specified insulating materials for hazardous live parts. Note especially:

1) Insulating Tape

2) PVC tubing

3) Spacers (insulating barriers)

4) Insulating sheets for transistors

5) Plastic screws for fixing micro switches

4. When replacing AC primary side components (transformers, power cords, noise blocking capacitors, etc.), wrap ends of wires securely about the terminals before soldering.

5. Make sure that wires do not contact heat generating parts (heat sinks, oxide metal film resistors, fusible resistors, etc.)

6. Check if replaced wires do not contact sharply edged or pointed parts.

7. Make sure that foreign objects (screws, solder droplets, etc.) do not remain inside the set.

MAKE YOUR CONTRIBUTION TO PROTECT THE ENVIRONMENT

Used batteries with the ISO symbol for recycling as well as small accumulators (rechargeable batteries), mini-batteries (cells) and starter batteries should not be thrown into the garbage can. Please leave them at an appropriate depot.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

WARNING:

Before servicing this TV receiver, read the X-RAY RADIATION PRECAUTION, SAFETY INSTRUCTION and PRODUCT SAFETY NOTICE.

X-RAY RADIATION PRECAUTION

1. Excessively high can produce potentially hazardous X-RAY RADIATION. To avoid such hazards, the high voltage must not exceed the specified limit. The normal value of the high voltage of this TV receiver is 27 KV at zero bean current (minimum brightness). The high voltage must not exceed 30 KV under any circumstances. Each time when a receiver requires servicing, the high voltage should be checked. The reading of the high voltage is recommended to be recorded as a part of the service record, 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 as specified in the parts list.

3. Some parts in this TV receiver have special safety related characteristics for X-RADIATION protection. For continued safety, the parts replacement should be under taken only after referring the PRODUCT SAFETY NOTICE.

SAFETY INSTRUCTION

The service should not be attempted by anyone unfamiliar with the necessary instructions on this TV receiver. The following are the necessary instructions to be observed before servicing.

1. An isolation transformer should be connected in the power line between the receiver and the AC line when a service is performed on the primary of the converter transformer of the set.

2. Comply with all caution and safety related provided on the back of the cabinet, inside the cabinet, on the chassis or picture tube.

3. To avoid a shock hazard, always discharge the picture tube's anode to the chassis ground before removing the anode cap.

4. Completely discharge the high potential voltage of the picture tube before handling. The picture tube is a vacuum and if broken, the glass will explode.

5. When replacing a MAIN PCB in the cabinet, always be certain that all protective are installed properly such as control knobs, adjustment covers or shields, barriers, isolation resistor networks etc.

6. When servicing is required, observe the original lead dressing. Extra precaution should be given to assure correct lead dressing in the high voltage area.

7. Keep wires away from high voltage or high tempera ture components.

8. Before returning the set to the customer, always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, screwheads, metal overlay, control shafts, etc., to be sure the set is safe to operate without danger of electrical shock. Plug the AC line cord directly to the AC outlet (do not use a line isolation transformer during this check). Use an AC voltmeter having 5K ohms volt sensitivity or more in the following manner. Connect a 1.5K ohm 10 watt resistor paralleled by a

0.15µF AC type capacitor, between a good earth ground (water pipe, conductor etc.,) and the exposed metallic parts, one at a time. Measure the AC voltage across the combination of the 1.5K ohm resistor and 0.15 uF capacitor. Reverse the AC plug at the AC outlet and repeat the AC voltage measurements for each exposed metallic part. The measured voltage must not exceed 0.3V RMS. This corresponds to 0.5mA AC. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately. The resistance measurement should be done between accessible exposed metal parts and power cord plug prongs with the power switch "ON". The resistance should be more than 6M ohms.

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this TV receiver have special safety-related characteristics. These characteristics are offer passed unnoticed by visual spection and the protection afforded by them cannot necessarily be obtained by using replacement components rates for a higher voltage, wattage, etc. The replacement parts which have these special safety characteristics are identified by marks on the schematic diagram and on the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement parts which do not have the same safety characteristics as specified in the parts list may create shock, fire, X-RAY RADIATION or other hazards.

Good earth ground such as the water pipe, conductor, etc.

AC Leakage Current Check

AC VOLTMETER

Place this probe on each exposed metallic part

II. Specifications

1.Power supply TV: AC 220 V, 50Hz

Remote control battery: 3V (UM-3X2)

2.TV system RF input : PAL BG/DK, SECAM BG/DK

Video input : PAL/SECAM/NTSC 3.58/NTSC 4.43

3.Receiving channels VHF-L : E2-S10

VHF-H: E5-S41 UHF : E21-E69

4.Intermediate frequencies Picture : 38.9MHz

5.Scanning Horizontal (Hz) : 15625/15750

Vertical (Hz) : 50/60

6. Color picture tube: 21” 25” 29” 90 degree North(1) hemisphere Bv=+0.35G±0.2G

7.Operating temperature Fulfil all specifications: 15°C ~ 35°C

Accept picture/tone reproduction: 5°C ~ 45°C

8.Operating relative humidity Fulfil all specifications: 45% ~ 75%

Accept picture/tone reproduction: 15% ~ 90%

9.Electrical & Optical Specification:

No. Items Instruction Typical Limit Unit

1 Video sensitivity For 30dB S/N VL ≤45 ≤48

VH ≤45 ≤48 dBuV

U ≤48 ≤51 2 FM sound sensitivity For 30dB S/N 30 ≤35 dBuV 3 Synchronizing sensitivity For RF transmission 25 ≤30 dBuV 4 Color sensitivity For RF transmission 32 ≤40 dBuV 5 Teletext sensitivity TV screen refreshes 40 times

number of mistakes ≤8 N/A N/A dBu 6 Minimum NICAM threshold Without crackline noise N/A N/A dBu 7 AGC static characteristic Accept. Picture/tone repr. 103 ≥100 dBu 8 Selectivity Adjacent sound carrier 40 ≥35

Below adjacent sound carrier 35 ≥30 dB

Adjacent picture carrier 50 ≥40

Up adjacent picture carrier 45 ≥30 9 IF rejection 55 ≥50 dB 10 Image rejection VHF 55 ≥50 dB

UHF 50 ≥45 11 AFT pull-in range M/N N/A N/A MHz

DK/I/BG ±1.5 ≥|±1.0| 12 Chroma sync pull-in range ±500 ≥|±200| Hz 13 Color killer function -25 ≤-16 dB 14 DC restoration 3 ≤10 % 15 Resolution Horizontal PAL/SECAM 320 ≥300

NTSC 270 ≥250

Vertical PAL/SECAM 410 ≥400 lines

NTSC 320 ≥300 16 Overscan Cross hatch signal 93 90~96 % 17 Linearity Horizontal 7 ≤10 %

Vertical 6 ≤8 % 18 Pattern distortion 1.5 ≤3 % 19 Picture position In all direction ±3 ≤|±6| mm 20 Raster rotation In all direction 4 ≤6 mm 21 Convergence error 0.4 ≤0.6 % 22 White balance (8700°K) X 0.288 0.288±0.015

Y 0.298 0.298±0.015 / 23 Maximum full white At picture tube center 110 ≥100 cd/m

90 ≥80 cd/m

80 ≥70 cd/m 24 H sync pull-in range ±500 ≥|±200| Hz 25 V sync pull-in range 7 ≥6 Hz 26 Anode voltage 29 ≤32 KV [For 21A8/21B8/29A9 ABN87]

25 ≤27.5 KV [For 2109BN37]

27.5 ≤30 KV [For 25A9ABN87/21A9BN37] 27 Audio frequence response ±3dB ref. to 1KHz 0.2~8 0.2~8 KHz 28 Audio output power 1KHz 10% THD 2x3 ≥2x3 W [For 25A9/29A9ABN87]

50KHz DEV. (BG/I/DK) 2x1.5 ≥2x1.5 W [For 21”] 25KHz DEV. (M/N)

[For 21”]

[For 25A9ABN87]

[For 29A9ABN87]

No. Items Instruction Typical Limit Unit

29 THD Po=0.5W 1KHz 1 ≤3 % 30 Signal to buzz ratio 42 ≥40 dB 31 Minimum volume hum 6 ≤10 mVrms 32 Maximum woofer output power N/A N/A W 33 Woofer audio freqency response ±3dB ref. to 80Hz AV mode N/A N/A Hz 34 Bass control range 100Hz ref. to 1KHz AV mode N/A N/A dB 35 Treble control range 10KHz ref. to 1KHz AV mode N/A N/A dB 36 Balance Center N/A N/A

Max. N/A N/A dB

Min. N/A N/A 37 Volume control curve N/A / 38 Video input level 1.0 1±0.2 Vpp 39 Audio input level 0.5 0.5±0.3 Vrms 40 Video output level 1.0 1±0.2 Vpp 41 Audio output level 0.5 0.5±0.2 Vrms 42 Power consumpution Operating 80 ≤95 W [For 2109/A9BN37]

100 ≥100 W [For 21A8/B8BN87] 110 ≤150 W [For 25A9ABN87] 120 ≤160 W [For 29A9ABN87]

Stand by 10 ≤15 W 43 IR receiving distance ±30° 6 ≥4 m 44 X-ray radiation <0.1 ≤0.5 mR/h 45 Dielectric strength AC 3KVrms 2 sec. 3 ≤5 mArms

Test Condition

1 Picture Modulation 87.5% 2 Sound Modulation 27KHz Dev. For DK/I/BG

15KHz Dev. For M/N 3 Picture to Sound Ration 10dB 4 Sound Artificial Load Resistor 8 ohm 5 Video signal White and black

(three white & two black) 6 Audio signal 1KHz sine wave 0.5Wrms

7 Conditions of the TV setting:screen

A. Switch TV on and let it warm up for more than 30 minutes. B. Connect RMS volt meter to speaker terminals and adjust theTV volume to get 500mW RMS power at each terminal. C. Place the MINOLTA CA-100 test probe to white part of the screen,adjust the contrast until a reading of 80cd/m D. Place the MINOLTA CA-100 test probe to black part of the screen,adjust the brightness until a reading of 2cd/m E. Repeat step C & D until the exact luminance values is obtained or the nearest possible values you can get.then record the

luminance values & R.G.B gun voltage values at the same time. and take the largest values for measurement referenct.

F. Input standard color bar(100/0/75/0),then adjust the colour.until the waveforms at the blue gun of same level is obtained.

+P8 P5+

+P1

+P4 P2++P0

+P7 P6+

+P3

1/9H

1/9W

Convergence error test point on

is obtained.

III. Level List of Equipments & Instruments Required for Production

No.Designation Requirement Reference Model Remark 1 Pattern Generator System of output signal: PHILIPS

RF out: PAL BG/SUB/DK/I, PM5518-TN SECAM B/G/D/K, NTSC M PM5418-TN

Video out: NTSC 4.43/3.58 PAL 60Hz 2 Digital voltmeter Input Resistance 10M FLUKE 45 3 Withstanding Withstanding Voltage: KIKUSUI TOS 8650 Irresistible Voltage Measure

Voltage Tester AC 1.5KV, 5KV/0-5KV ± 3%

Cut-off current: AC 0-2mA,

20mA / continuously Adjustable 4 Insulation Tester Test voltage:1000V. 500V KIKUSUI TOS 7100L 5 Sine wave Signal Frequency Range: 0.1~140MHz LEADER 3216 For generating IF Signal

Generator ( Precision:10KHz )

Level Range: -20~126dB 6 Oscilloscope Frequency response: 20MHz or above 7 CRT Color MINOLTA CA-100 For White Balance Adjustment

Analyzer

8 DC Regulated Max output Voltage 14V Supply DC power

Power Supply

9 Color Monitor AV receiving system: Should include Same model (of TV set) For operation check

all the AV output system of the as the products For resolution check

products at least. For Skew Check 10 Audio Signal Frequency of output signal: KENWOOD AG-203A For generating audio signal

Generator 20Hz-20kHz

IV. Applying Adhesive on Main PCB

i. For 25A9/29A9 models