Erisson 21SP50 Schematics
Adjustment of Complete Set
1. +B adjustment
z Switch on the power.
z Use digital voltmeter to monitor +B
z Receive Philips pattern signal.
z Adjust RP851 to get 110±0.5V
2. Vertical linearity and size adjustment
z Switch on the TV.
z Press “Factory” key TRICE to enter “adjustment status”, use “MUTE” key to select ADJUST
MENU0.
z Use P+/P- to select item “V.SIZE” and “V.LINE”.
z Use V+/V- to adjust.
3. White Balance adjustment
z Preheat 30 minutes before adjustment.(Enter “Factory Status” by pressing “factory” key to
prevent automatic switch off during preheat)
z Degauss the CRT.
z Receive mono-scope signal.
z Press “Factory” key to enter “S.BRI” status.
z Press “MUTE” to get a horizontal line.
z Turn the SCREEN volume of FBT to make the horizontal line can just been seen.
z Press “MUTE” key again to quit horizontal line mode.
z Receive Black and White signal.
z Use P+/- to select “R.DRV’,’B.DRV”,”R.BIA”,”B.BIA”. Use V+/- to adjust the white balance.
4. Focus adjustment
z Receive mono-scope signal.
z Turn the focus volume of FBT to adjust focus.
5. Picture adjustment
z Receive PAL and NTSC signal.
z Press “Factory” key TRICE to enter “adjustment status”, use “MUTE” key to select ADJUST
MENU0.
z Use P+/- to select item
z Use V+/- to adjust.
6. Purity and convergence test
z Receive Red pattern.
z Degauss the TV.
z Check the purity.
z Receive Cross hatch pattern.
z Check the convergence.
Page 1 of 5
Adjustment Menus
Black-white balance table
Item Reference
Value
A
SUB-BRI
R-BIA
50 ○
55 ○
A
G-BIA 150 Green Bias
A
B-BIA
R-DRV
90 ○
100 ○
A
G-DRV 15 Green Drive
A
B-DRV
80 ○
C.B/W 0 Internal Signal 0-3
Description Value range Remarks
SUB Brightness
Red Bias
Blue Bias
Red Drive
Blue Drive
0=normal
1=low light
2=high light
3=Cross
Menu0
Item
H.PHASE
V.SIZE
V.LINE
V.POSITION
V.SC
NT.H.PHASE
NT.V.SIZE
NT.V.LINE
NT.V.POSI
NT.V.SC
Reference
Value
A
8 ○
A
80 ○
A
11○
A
56 ○
A
0 ○
A
+08 ○
A
+01 ○
A
00 ○
A
+08○
A
00 ○
Description Value range Remarks
Horizontal Centre 0~31
Vertical Size 0~127
Vertical linearity 0~31
Vertical Centre 0~63
Vertical S-Correction 0~31
NTSC Horizontal Center -7~+8
NTSC Vertical amplitude -31~+31
NTSC Vertical Linearity -7~+8
NTSC Vertical Position -31~+32
NTSC S-Correction -7~+8
Menu1
Item
H.BLK.LEFT
H.BLK.RIGHT
RF.AGC 3 RF. AGC 0~63
VOLUME OUT 120 Internal Volume Output Amplitude 0~127
OSD.CONT 60 OSD Contrast 0~31
OSD H.POSI
OSD V.POSI
DIGITAL OSD ON Digital OSD setup ON/OFF
Reference
Value
A
4 ○
A
3 ○
A
15 ○
A
20 ○
Description Value range Remarks
Horizontal Left Blanking 0~7
Horizontal Right Blanking 0~7
OSD Left/Right Position 0~127
OSD Up/Down Position 0~127
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