Kenwood LZ 601 Service Manual

Page 2

LZ-601
BLOCK DIAGRAM

T301-
IC301 I
SWITCHING
BACKLIGHT REGULATOR I/OfiTAGE I
W201 DEL/W ggéfig Osc
l0201 Icaoz H V EN 7
PICTURE BR! HIGH VOLTAGE ' '
CONTROL CONTROL VOLTAGE
NFB
VIDEO PROCESS
WHITH
BALANCE T2°_ _
ADJUSTMENT +3ov
W201 IC101 0101
R G 8 POWER SOURCE SWITCHING PULSE PLUSE +14V
DC 12V l/P CONTROL AMP
+2ov
VGH -- +2ov I
VSH of +14V
LCD MODULE VGL _ W I +5.3V
VDD .- +5V I
I -5v
sTwm-HIIE
TRAN
VOLTAGE
NFB
INPUT OUTPUT ALIGNMENT
No. ITEM ALIGN FOR STANDARD
SETTINGS SETTINGS POINTS
1.Adjust SVR102 so that the
output-side voltage of L102 is L102 +5V :5V +0.2V, -0V
LINE Connect a DC between 5.15 and 5.20V. D101 +14V: 14Vi0.4V
1 VOLTAGE - voltmeter to SVR102 2. AIter completing the adjust- D102 +20V : 20V +3\/, -1 V
L102 (output side) ment of SVFI102, check the D104 +30V : 30V +3V, -1V
Voltages at D101, 102, 104 D105 -5V :-5V:0.2V
and 105.
1.Adjust SVR101 so that the 13.5useci0.4usec
Connect a
OSC& pulse duration is 13.5usec
oscilloscope or -
PULSE i0.4usec. 2V I
2 - frequency SVR101 _ _ pp 15V
WIDE Instead, It Is also acceptable pp
counter to . I
CONTROL to adjust so that the frequency _
0101 (collector) W
counter reads 74KHL+2I Adjust so that figure comes NTSC : A 23.0mmi1mm
on the center position. B :4.0mmi1 mm
Puts a Video A C :18mmi1mm
signal for H-POS D :19mmi1mm
3 H-POS _ _ -
the Inspection (LCD UNIT) D C PAL : A :4.0mmt1mm
in VIDEO IN kg B :2.0mmt1mm
B : 20mmi1 mm
B : 21mmi1mm