Erisson 1405 Schematic

SERVICE MANUAL

3Y31 CHASSIS

Design and specifications are subject to change without prior notice.
( ONLY REFERRENCE)

ENGINEER BY: CHECKED BY: PPROVED BY:

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Contents

Safety Notice
Technical specification-------------------------------------------­Chassis Block Diagram--------------------------------------------5
IC Block Diagram -------------------------------------------------6-9
Transistor mark ----------------------------------------------------10
PCB Top/Bottom layer -------------------------------------------11-13
Service Adjustments ------------------------------------------- 14-17
Purity and Convergence Adjustment ----------------------------18
Control Location ---------------------------------------------------19
Input and Output Terminals----------------------------------------20
Operation Instructions
Mechanical Disassemblies----------------------------------------27
Circuit Diagram-----------------------------------------------------28

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3-4

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Safety Notice

SAFETY PRECAUTIONS

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 notes provided on the cabinet back, inside the
cabinet, on the chassis or the picture tube.
3:When replacing a chassis in the cabinet, always be certain that all the protective devices
are installed properly,such as,control knobs, adjustment covers or shields, barriers,isola­ tion resistor-capacitor networks etc.. Before returning any television to the customer,the
service technician must be sure that it is completely safe to operate without danger of
electrical shock.

X-RADIATION PRECAUTION

The primary source of X-RADIATION in television receiver is the picture tube. The picture
tube is specially constructed to limit X-RADIATION emissions. For continued X-RADIATION
protection, the replacement tube must be the same type as the original including suffix
letter. Excessive high voltage may produce potentially hazardous X-RADIATION. To avoid
such hazards, the high voltage must be maintained within specified limit. Refer to this
service manual, high voltage adjustment for specific high voltage limit. If high voltage exce­eds specfied limits, take necessary corrective action. Carefully follow the instructions for
+B1 volt power supply adjustment, and high voltage check to maintain the high voltage
within the specified limits.

PRODUCT SAFETY NOTICE

Product safety should be considered when a component replacement is made in any area
of a receiver. Components indicated by mark in the parts list and the schematic diagram
designate components in which safety can be of special significance. It is particularly
recommended that only parts designated on the parts list in this manual be used for com­ponent replacement designated by mark . No deviations fromresistance wattage or vol­tage ratings may be made for replacement items designated by mark .

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FEATURES:

l AC 90V - 260V 50/60Hz
l MULTI SYSTEM: PAL BG/DK/I,SECAM BG/DK(OPTION),NTSC M(OPTION)
l VOLTAGE SYNTHESISED TUNING SYSTEM
l 100/256 PROGRAM S MEM ORY (OPTION)
l BLUE BACK FUNCTION
l 120 MINUTES SLEEP TIMER
l FULL AUTO PROGRAM
l TIME ON
l CLOCK ; CHILD LOCK
l 2 AV INPUT
l GAME (OPTION)
l 8 PAGES TELETEXT (OPTION)
l BLACK LEVEL STRETCH

l PROGRAM VIEW FUNCTION
l FOUR PICTURE MODE：MILD;COLORTUL; STANDARD ;CUSTOM;DYNAMIC

GENERAL SPECIFICATION:

1、POWER CONSUMPTION： 14 ″ 70W （MAX.）

21 ″ ９０ W　（ MAX.）

2、RECEIVE SYSTEM： D/K ; I ; B/G ; M
3、 COLOUR SYSTEM : PA L / SECAM / NTSC
4、VISION INTERMEDIATE FREQUENCY ： 38.9MHz
5 、 INTER-CARRIER FREQUENCY: 4.5 MHz (M)

5.5 MHz (B/G)

6.0 MHz (I)

6.5 MHz (D/K)

6. CHROMA IF FREQUENCY PAL/NTSC: 34.47/35.32 MHz

7、ANTENNA TYPE: DIN TYPE 75 OHM
8、 CHANNELS RECEIVING : VHF-1 A0;E2-E4;S1-S9 CH 46.25-161.25MHz

VHF-3 S10-S41; E5-E12 CH 168.25-463.25MHz

UHF E21-E69 CH 471.25-855.25MHz

9、 TUNING SYSTEM： VS TUNING
10、 AV IN/OUT： 2 AV I N + 1 AV STEREO OUT
11、AV IN/OUT SPECIFICATION： VIDEO IN----1.0 ±0.2V

P-P

75 OHM　

AUDIO IN----0 -2V (r.m.s)

VIDEO OUT----1.0±0.2 V

P-P

75 OHM　

AUDIO OUT----0-2V (r.m.s)

12、OSD LANGUAGE： ENGLISH
13、 AUDIO OUTPUT POWER: > 3W (1KHz, 0.5V INPUT , 10%THD)
14、SAFETY AUTHENTICATION STANDARD： CB
15、LED INDICATORS： POWER ON
16、 HAND SET TYPE ： HS08
17、HAND SET POWER SUPLY ： BATTERY 3V （UM-3/R6/AA）x2
18、COLOUR PICTURE TUBE： 14"－21" 90 DEGR EE TUBE　
19、 REMOTE CONTROL DISTANCE: ≥5 m