Kenwood LZ-601 Service Manual

6.4 INCH ON-DASH MONITOR

LZ-601

SERVICE MANUAL

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

LINE

VOLTAGE

OSC&

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.

B : 20mm±1mm B : 21mm±1mm

ADJUSTMENT

LZ-601

No. ITEM

4 BRIGHT

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

A B C D E

VIDEO

DOWN

OG V

RGB

SW802

SW801

SW302

IR501

CONTROL UNIT

D303

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

CONTROL UNIT

R303

C501

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

C308

R319

Z301

R317

C309

Q301

IC301

R320

Q305

C304

R310

R321

304 Q

D301

C305

W802

W804

R808 C801

C502 R805

R502 R810 C802

R805 R806 R807 R812

Q801

R811

C302

IC801

SDGSD

C303 C301 R823

Q802

C804

R810

C814 C813

C811 C812

R821 R822

C803

W801

W803

CONTROL UNIT

IC Q Address

301 2B 801 4B 802 4B

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

+ 8 hidden pages