Text preview for : ERISSON 2120 04.pdf part of Erisson 2120 04 . Rare and Ancient Equipment Erisson TV Телевизор ЭЛТ Erisson 2120 ERISSON 2120 ERISSON 2120 04.pdf



Back to : ERISSON 2120 04.pdf | Home

ALIGNMENT INSTRUCTION (3Y01)
1. Please notice the following before alignment and equipment:
1-1 Don't short any two soldering points, which should not be shorted and don't touch any components, which
should not be touched.
1-2 Please pull out plug before equipment.
1-3 For safety reasons, all components equipped or replaced should be identical with BOM.
1-4 Must be warm up for 30 minutes or more and degauss CRT thoroughly with demagnetizer before
alignment.
1-5 The data of EEPROM must be stored before the adjustment for main chassis.

2. Tools and equipment for adjustment
2-1 small "-" screwdriver
2-2 screwdriver without inductance
2-3 Pattern Generator
2-4 DC Regulated power supply
2-5 Digital Voltmeter
2-6 Sweep Signal Generator
2-7 20MHz 2-channel Oscilloscope

3. Signal condition


PICTURE SOUND
ITEMS LOGO PATTERN SYSTEM REMARK
CARRIER MODE
PHILIPS
1 CHN-1CH 49.75MHz PAL-I 1KHz
PATTERN
L: -------- STEREO/
2 WE-6CH 182.25MHz RED PATTERN PAL-B/G
R:400Hz TELETEXT
GREY SCALE SWEEP
3 CHN-12CH 216.25MHz SECAM-D/K
/COLOR BAR SOUND
CROSS HATCH
4 CHN-13CH 471.25MHz PAL-D/K 1KHz
PATTERN
WITHOUT
5 USA-33CH 585.25MHz COLOR BAR NTSC-M -------- SOUND
CARRIER
MONOSCOPE SWEEP
6 -------- 751.25MHz PAL-I
PATTERN SOUND
GREY SCALE
7 -------- 85.25MHz SECAM-L' 1KHz SYS-2
/COLOR BAR
DOUBLE
A:400Hz
8 WE-S20CH 294.25MHz Semi-COLOR BAR PAL-B/G SOUND
B:1KHz
CARRIER




1
4. Adjust for main chassis
4-1 PIF Adjustment (38.9MHz)




20V
+
+
TUNER


IF




Ic302
L108
Ic201




L203
C227




D608



Fig.1

4-1-1 Tuner AGC connects to GND. Pattern Generator outputs 38.9MHz R.F. signal and connects to tuner IF
output terminal or pin5 of saw filter.
4-1-2 Connect Digital voltmeter across C227. DC Regulated power supply positive terminal output +20V to
pin1of IC302 and negative terminal of D608. DC Regulated power supply negative terminal connects to
pin2 of IC302.
4-1-3 Adjust L203 coil to obtain 3.6V Digital voltage meter reading.

4-2 System NTSC Adjust(L108)
4-2-1 Tuner AGC connects to GND. Connect Sweep Signal Generator to tuner IF output terminal. Sweep
oscilloscope V-IN terminal connects to C109. And connect Q102 'b' pole to the power terminal of R104
through a 10K resistor.(shown in FIG.2)
2
+20V




TUNER
C109
IF




Ic302
R104
L108
D
Q102 10k




MAIN CHASSIS
FIG.2
4-2-2 Apply +20V DC across IC302 as shown in FIG.2.
4-2-3 Adjust L108 to obtain waveform as following. There will be no alignment to it without NTSC system.
33.4MHz
39.5MHz
THE UPMOST POINT



32.4MHz
38.9M
4-3 B+ adjustment
4-3-1 Disconnect horizontal load. Connect a light bulb (100 W) AC 250V across C321.
4-3-2 Connect 220V AC 50Hz to CN601 and switch on power switch.
4-3-3 Test the voltage with digital voltage meter between C321 two terminals.
4-3-4 Adjust VR601 to obtain +110V +/- 0.5V.

4-4 AGC alignment
4-4-1 Receive 60dB +/- 2dB RF signal. Connect Digital voltmeter positive terminal to AGC terminal of TUNER
and negative terminal to GND.
4-4-2 Press "MENU" key twin, till the PICTURE MENU appears, then press "Q.VIEW" or "RETURN" key,
"MUTE" key to turn on CPU. TV SET will go to factory mode. Press "TIMER" key to go to the next factory
menu. Go to "MENU 3" status by this means.
4-4-3 Select RF.AGC by pressing "CH+" or "PROG+" and "CH-" or "PROG-" keys. Adjust "VOL+" and
"VOL-" keys to obtain 4V Digital voltage meter reading.
4-4-4 Press "MENU" key to exit factory mode.
3
5. COMPLETE MACHINE GENERAL ADJUSTMENT
5-1 Go to factory mode according to 4-4-2 before warm up line.

5-2 Focus Adjustment.
5-1-1 Receive monoscope pattern.
5-1-2 Set TV to work in dynamic status.
5-1-3 Adjust the focus knob of FBT to get the clearest picture.

5-3 Screen Voltage Adjustment.
5-3-1 Go to factory mode "MENU 2" status according to 4-4-2.
5-3-2 Select "V-KILL" by pressing "CH+" or "PROG+" and "CH-" or "PROG-" keys..
5-3-3 Press and hold on the "VOL+" key all the time, Adjust the screen knob of FBT to get a horizontal
faintness beam line. Then release "VOL+" key.

5-4 White Balance Adjustment (Applied in factory only)
5-4-1 Set the TV set to AV mode. Receive black white pattern (Color Temperature test pattern).
5-4-2 Insert 6 Pin Service flat cable into CN002. Press adjustment keys, and then go to automatic white
balance adjustment.
5-4-3 After adjusting well, remove the 6 Pin Service flat cable.

5-4(1) White Balance adjustment (Applied when servicing)
5-4(1)-1 Set the TV set to AV mode. Receive black white pattern (Color Temperature test pattern).
5-4(1)-2 Put the test probe 1 of CRT color analyzer (CA-100) on the Low Bright area and the test probe 2 on the
High Bright area. Adjust bright and contrast to get 5nit of low bright area and 80 nit of high bright area.
5-4(1)-3 Go to factory mode "MENU2" according to 4-4-2. Obtain Low Bright area to x=281and y=311 by adjusting
R.bias and B.bias. Obtain High Bright area to x=281and y=311 by adjusting R.drive and B.drive. Obtain
both area to x=281 and y=311 by adjusting the two status repeatedly.

5-5 Sub-bright adjustment
5-5-1 Receive GREY SCALE signal. (PHILIPS PM54200, 11 STEP)
5-5-2 Set TV at normal mode.
5-5-3 Get into factory mode, adjust sub-bright option to make the picture same as below.



Totally dark Can be seen the brightness

5-6 Vertical Size and PinCushion Adjustment
5-6-1 Receive monoscope pattern. Set TV standard status. Adjust V.size to obtain picture's vertical redisplay ratio
more than 90% in factory mode "MENU1".
5-6-2 Receive cross hatch pattern. Set TV standard status. Adjust V.LINE and V.SC to obtain picture's vertical pin
cushion a good status in factory mode "MENU1".
5-6-3 Receive cross hatch pattern. Set TV standard status. In factory mode "MENU1" adjust V.POSITION to
obtain picture's vertical center at the center of CRT screen.
4
5-7 Horizontal Center Adjustment
Receive PHILIPS PATTERN. Set TV standard status. Adjust H.PHASE to obtain horizontal center at the center
of CRT screen.

5-8 Secam color decoder alignment.
Receive the GREY SCALE /COLOR BAR signals. Enter into the factory mode. Adjust the values of Secam R-Y
DC and Secam B-Y DC to make the gray scale to the normal color.

5-9 COLOR PURITY ADJUSTMENT
5-9-1 Before color purity adjustment, Warm up the TV set over 15 minutes and fully degauss.
5-9-2 Receive pure white signal in AV status and set the TV receiver dynamic.
5-9-3 Go to factory mode "MENU2". After write down the values of R-BIAS and B-BIAS, set the values of
R-BIAS and B-BIAS zero.
5-9-4 Loosen the clamp screw of the deflection yoke and pull the deflection yoke towards color purity magnetic
loop.
5-9-5 Adjust color purity magnetic loop to make the green area at the center of CRT screen.
5-9-6 Slowly push the deflection yoke toward the front of CRT and set it where a uniform green field is obtained.
Tighten the clamp screw of the deflection yoke.
5-9-7 Restore the values of R-BIAS, G-BIAS and B-BIAS.

5-10 CONVERGENCE ADJUSTMENT
5-10-1 Receive a dotted pattern. Set the TV receiver dynamic.
5-10-2 Loose the convergence magnet clamper and align red with blue dots at the center of the screen by
rotating (R, B) static convergence magnets.
5-10-3 Align Red/Blue with green dots at the center of the screen by rotating (RB-G) static convergence
magnet.
5-10-4 Remove the DY wedges and slightly tilt the deflection yoke horizontally and vertically to obtain the good
overall convergence. Fix them after the good overall convergence got.
5-10-5 Fix the convergence magnets by turning the clamper.
5-10-6 If purity error is found, follow "PURITY ADJUSTMENT" instructions.
Purity Magnet
RB-G RB


Magnet Clamper




Static Magnet

5
Appendix: If customer logo is needed, please set LOGO ON 1 and CUS.LOGO (or CUSTOM LOGO) 1 at the
SERVICE MODE. Change the data of E2prom to get the custom logo with special implement ( I2C converter Board
and Computer). Please see the details as following.

Method to Write Data for Custom Logo
The are total 12 characters that can be input into E2prom and display on the TV. The address range of
E2prom (24C04) is from 170H-17BH. The following table shows the code input character.


Character Data Code Character Data Code
'0' 30H 'K' 4BH
'1' 31H 'L' 4CH
'2' 32H 'M' 4DH
'3' 33H 'N' 4EH
'4' 34H 'O' 4FH
'5' 35H 'P' 50H
'6' 36H 'Q' 51H
'7' 37H 'R' 52H
'8' 38H 'S' 53H
'9' 39H 'T' 54H
'A' 41H 'U' 55H
'B' 42H 'V' 56H
'C' 43H 'W' 57H
'D' 44H 'X' 58H
'E' 45H 'Y' 59H
'F' 46H 'Z' 5AH
'G' 47H '/' 2FH
'H' 48H '.' 2EH
'I' 49H '*' 40H
'J' 4AH ' ' 09H