LG GL140W, GL160W Schematics

BLOCK & CIRCUIT DIAGRAMS

Схема LG VCR model: GL140W,GL160W - L414_L415_L416_L417_L418_L476_L479

BD101

LINE FILTER

BLOCK

!

(C101, L102, C102)

R107

F101

!

R101

+

C103

DRIVE & S/W

BLOCK

(IC101, C109, D103, R103, C129,

R109, R125, R126, C135, BC101)

SNUBBER

BLOCK

(D102, R104,
C105, C106)

T101

!

TRANSFORMER

6

4

3

10

11

DC MODEL OPTION

6V REG BLOCK

F182 F181

FROM DC JACK

DC 12V IN

9V REG BLOCK

7

RECTIFIER &

D183

D181

(Q152, ZD152, C155,

Q162, C152, R152)

SMOOTHING

(D109, C120,

8

L104, C121)

D153

D152

Hi-Fi
OPTION

TO SYS

12VA(Cap)

TO SYS

9

D151

13VA(DRUM)

TO Hi-Fi BUFFER

13VA

RECTIFIER &

J152

(MONO OPTION)

SMOOTHING

(C116, D106,

L103, C117)

5V S/W

TO AVCP, OSD

5.1V

BLOCK

BK

(BR)

!

PW101

WH

(BL)

HOT GND

!

C112C113

!

HOT CIRCUIT

NOTES : Symbol denotes AC ground.

Symbol denotes DC chassis ground.

4

3

2

IC102

1

FEED-BACK

BLOCK

(R116, R117, R118,
R119, R120, R121,

!

2

C114)

IC103

3-20 3-21

(Q155, R156, R157)

5V S/W
BLOCK

(Q157, R170, R171)

PWR CTL

BLOCK

(Q156, R161)

TO SENSOR MOD

5.1V

FROM SYS

P.CTL "H"

TO SYS, MOD

5.3VA

2. Power(SMPS) Circuit Diagram LG VCR model: GL140W,GL160W - L414_L415_L416_L417_L418_L476_L479

12VA Power dead.

D109 is defective.

Power dead.

BD101,R101 are
defective.

5.4VA Power dead.
D106 is defective.

NOTE :

1. Shaded( ) parts are critical for safety. Replace only
with specified part number.

2. Voltages are DC-measured with a digital voltmeter
during TUNER mode.

F101 is defective.

NOTES) Symbol denotes AC ground.

NOTES) Symbol denotes DC chassis ground.

Power dead.

NOTES) Warning

NOTES) Parts that are shaded are critical
NOTES) With respect to risk of fire or
NOTES) electricial shock.

Switching dead.

IC101 is defective.

36VA Power dead.

D105 is defective.

Switching error

IC102, IC103 are
defective.

3-22 3-23

3-24 3-25

3. MODULATOR CIRCUIT DIAGRAM

3-28 3-29

5. Y/C BLOCK DIAGRAM_PAL/MESECAM/NTSC

1) PB Mode 2) REC Mode

+

+

28

51

49

53

98

73 6574

80

85

86

87

899190

83

IC301

HA118725

76 77

10

67 69

29

30

3640383733 35

31

32

57 45 43 4271 46

55

EP CH1

EP CH2

V. OUT

(TO u-COM)

D-V SYNC

(FROM u-COM)

System

System

Y-CCD

C-CCD

CLOCK Drive

LPF

REC-AMP

SP CH2

REC-AMP

SP CH1

REC-AMP

EP CH2

REC-AMP

EP CH1

DATA

(FROM u-COM)

System

CLOCK

(FROM u-COM)

System

V.H/SW30

(FROM u-COM)

V.ENV

(TO u-COM)

System

SP CH1

SP CH2

Serial Cont

interface

X-tal

VCO/OSC

X301 X302

TRAP

629K

FM AGC P.EQ G.EQ D LIM Y LPF

Main

De-Empf

DEMO

S LPF

2M LPF

ACC

CTL Trap

fh Trap

HIFI Trap

C LPF DEALY

MIX

AMP

6dB

AMP

C-

SQUELCH

SQUEL CH

CLEAR

SYNC

CLAMP

CLAMP

Sharpness

CONTROL

YNR NC

SYNC SEP

NL

De-eMPH

VCA

C.K

LPF

BDBPF

CCD LPF

APC/ACC

DET

L- DET

Main

Conv2

Main

Conv1

FBC

Video ALC

+

+

++

28

29

51

49

53

55

46

19

15 17 18 36 40 38 37 23 26 14 9 8 11

LINE 1

VIDEO IN

57

45 7365 74 6967

80

85

86

87

89

91

90

ATT

-10dB

VIDEO

AGC

CLEAR

SYNC

V. OUT

(TO u-COM)

D-V SYNC

(TO u-COM)

System

System

Y-CCD

C-CCD

CLOCK Drive

6dB

AMP

FBC

Video ALC

SQUEL CH

ATT

-10dB

ATT

-10dB

LPF

AGC DET

CLAMP

YNR

CLAMP

SYNC

SEP

D.E.

C-LPF 2

SPFACC

HPF

C-LPF 1

NL Emph

REC FILTER

LPF

VCA

629K

TRAP

FBC

ALC

Main

Conv2

Main

Conv2

APC/ACC

DET

Main

Emph

FM

MOD

REC

Trap

REC-AMP

SP CH2

REC-AMP

SP CH1

REC-AMP

EP CH2

REC-AMP

EP CH1

MIX

ATT

B.E

C.K

CCD

LPF

L-DET

JCA

(-4dB)

f0=1.68M

f/0DEV

Adjst

X-tal

VCO/OSC

Serial Cont

interface

DATA

(FROM u-COM)

System

CLOCK

(FROM u-COM)

System

V.H/SW30

(FROM u-COM)

System

SP CH1

SP CH2

EP CH1

EP CH2

IC301

HA118725

32

30

71