Kenwood LZ-601 Service Manual

6.4 INCH ON-DASH MONITOR

LZ-601

SERVICE MANUAL

© 2002-4 PRINTED IN JAPAN
B51-7943-00 (N) 3394

Panel
(A64-2803-08)

Mounting hardware
(for E type, M type)
(W01-1508-05)

Liquid crystal
(B38-1102-08)

DC cord
(E30-6105-05)

LZ-601

15Vpp

13.5µS

2Vpp

PICTURE
CONTROL

WHITH
BALANCE
ADJUSTMENT

BRI

W201

VIDEO I/P

IC201

VIDEO PROCESS

RGB

LCD MODULE

VGH +20V

+14VVSH

-5VVGL

VDD +5V

BLOCK DIAGRAM

IC301

SWITCHING
REGULATOR
CONTROL
CIRCUIT

IC101

SWITCHING PULSE
CONTROL

IC302

HIGH VOL TAGE
CONTROL

W201

POWER SOURCE
DC 12V I/P

BACKLIGHT
DELAY

HIGH
VOLT AGE
OSC

VOLT AGE
NFB

Q101

PLUSE
AMP

VOLT AGE
NFB

T301

H.V . TRAN

T201

SWITCHING
TRAN

BACKLIGHT
LAMP

+30V

+14V

+20V

+5.3V

-5V

No. ITEM

2

1

LINE

VOLTAGE

OSC&

2

PULSE

WIDE

CONTROL

3 H-POS

ADJUSTMENT

INPUT OUTPUT ALIGNMENT

SETTINGS SETTINGS POINTS

1.Adjust SVR102 so that the

Connect a DC between 5.15 and 5.20V. D101 +14V: 14V±0.4V

– voltmeter to SVR102 2.After completing the adjust- D102 +20V: 20V +3V, –1V

L102 (output side) ment of SVR102, check the D104 +30V : 30V +3V, –1V

Connect a

1.Adjust SVR101 so that the 13.5µsec±0.4µsec

oscilloscope or

– frequency SVR101

counter to

Q101 (collector)

Adjust so that figure comes NTSC : A : 3.0mm±1mm
on the center position. B : 4.0mm±1mm

Puts a video C : 18mm±1mm

signal for

the inspection (LCD UNIT) PAL : A : 4.0mm±1mm

–

H-POS D : 19mm±1mm

in VIDEO IN B : 2.0mm±1mm

ALIGN FOR STANDARD

output-side voltage of L102 is L102 +5V : 5V +0.2V, –0V

voltages at D101, 102, 104 D105 –5V : –5V±0.2V
and 105.

pulse duration is 13.5µsec
±0.4µsec.
Instead, it is also acceptable
to adjust so that the frequency
counter reads 74kHz±2kHz.

A

CD

B

B : 20mm±1mm
B : 21mm±1mm

ADJUSTMENT

LZ-601

No. ITEM

4 BRIGHT

5

WHITE signal for

BALANCE the inspection

INPUT OUTPUT ALIGNMENT

SETTINGS SETTINGS POINTS

Puts a video

signal for

the inspection

in VIDEO IN

Puts a video

in VIDEO IN

Connect a DC 2)Adjust S207 so that the

voltmeter to S207 second grid from the right
IC201 (32P) of the gray scale dims by

Connect a DC

voltmeter to

IC201(27P or 28P) the unit is turned on.)

S204
S205

ALIGN FOR STANDARD

1.After turning the unit on, warm
it up for 15 minutes before
proceeding to the adjustment.

2.Adjust S207 so that the
voltage at IC201 pin 32 is IC201 32pin (Bright)

2.30V±0.1V DC. DC : 2.30V±0.1V

3.1)Turn the knob (BRIGHT) to 2) BRIGHT : CENTER

the center position. (It is put
to the center position at the
moment the unit is turned
on.) 3) BRIGHT : MAX

about 20%.

3)Turn the knob (BRIGHT) to

the MAX position and 4) BRIGHT : MIN
confirm that the three grids
from the left of the gray
scale are distinguishable.

4)Turn the knob (BRIGHT) to

the MIN position and
confirm that the three grids
on the right of the gray scale
are distinguishable.

1.After turning the unit on, warm
it up for 15 minutes before
proceeding to the adjustment.

2.Turn the knob (BRIGHT) to the
center position. (It is put to the
center position at the moment

3.R adjustment: Adjust S204 so
that the background is reddish.

4.B adjustment: Adjust S205 so
that the picture is gray.

Distinguish

Not distinguish

IC201 27pin

SVR204
DC : 1.75V±0.1V

IC201 28pin

SVR205
DC : 1.80V±0.1V

Not distinguish

Distinguish

12345

12345

12345

3

A B C D E

VIDEO

UP

DOWN

OG V

RGB

SW802

SW801

SW302

IR501

CONTROL UNIT

D303

1

PC BOARD
(COMPONENT SIDE VIEW) (FOIL SIDE VIEW)

CONTROL UNIT

R303

C501

2

3

R501 R323

Q302

R309

R308

R307

C306

R322

R325

Q306

R324

R316

R315

R318

F301

R804 R803 R802 R801 R814 R813

Q303

D302

R301
R302

EB

C308

R319

Z301

R317

C309

Q301

IC301

R320

EB

Q305

C304

R310

R321

304
Q

D301

C305

1

W802

20

W804

R808 C801

C502 R805

R502 R810 C802

4

R805 R806 R807 R812

Q801

R811

C302

IC801

SDGSD

C303 C301 R823

Q802

G

C804

R810

C814 C813

C811 C812

R821 R822

C803

W801

W803

5

CONTROL UNIT

IC Q Address

301 2B
801 4B
802 4B

Refer to the schematic diagram for the values of resistors and capacitors.

6

7

5