LG GL140W, GL160W Schematics

BLOCK & CIRCUIT DIAGRAMS

Схема LG VCR model: GL140W,GL160W - L414_L415_L416_L417_L418_L476_L479

DC MODEL OPTION

F182 F181	FROM DC JACK
6V REG BLOCK	DC 12V IN

		T101	!				9V REG BLOCK
R101		TRANSFORMER				D181	(Q152, ZD152, C155,	Hi-Fi
					D183		Q162, C152, R152)	OPTION
	SNUBBER	6	7
BD101				RECTIFIER &
	BLOCK
				SMOOTHING				TO SYS
+
C103	(D102, R104,			(D109, C120,				12VA(Cap)
	C105, C106)				D153		D152
		4	8	L104, C121)

TO SYS

9

13VA(DRUM)

LINE FILTER

D151

TO Hi-Fi BUFFER

!

BLOCK

(C101, L102, C102)

DRIVE & S/W

10

RECTIFIER &

J152

13VA

(MONO OPTION)

BLOCK

SMOOTHING

R107

(IC101, C109, D103, R103, C129,

(C116, D106,

F101

R109, R125, R126, C135, BC101)

11

L103, C117)

TO AVCP, OSD

!

3

5V S/W

5.1V

BLOCK

(Q155, R156, R157)

BK

WH

2

1

TO SENSOR MOD

(BR)

(BL)

5V S/W

! PW101

5.1V

HOT GND

4

FEED-BACK

BLOCK

!

BLOCK

(Q157, R170, R171)

(R116, R117, R118,

3

C113

C112

IC102

!

2

R119, R120, R121,

!

HOT CIRCUIT

C114)

P.CTL "H"

IC103

PWR CTL

FROM SYS

BLOCK

(Q156, R161)

TO SYS, MOD

5.3VA

SymbolNOTESdenotes:

AC ground.

Symbol denotes DC chassis ground.

3-20

3-21

	,GL160W2. Power(SMPS)- L414 L415_CircuitL416 L417DiagramL418_L476_L479
		12VA Power dead.
		D109 is defective.
	Power dead.
	BD101,R101 are
	defective.
		5.4VA Power dead.
		D106 is defective.
		36VA Power dead.
		D105 is defective.
	Switching dead.
	IC101 is defective.
	Power dead.	Switching error
		IC102, IC103 are
	F101 is defective.
		defective.

					NOTES)	Warning
NOTES)			Symbol denotes AC ground.		NOTES)	Parts that are shaded are critical
NOTES)			Symbol denotes DC chassis ground.		NOTES)	With respect to risk of fire or
					NOTES)	electricial shock.

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.

3-22

3-23

3. MODULATOR CIRCUIT DIAGRAM

3-24

3-25

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<![if ! IE]> <![endif]>System

<![if ! IE]> <![endif]>Mode PB 1)

X301 X302

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<![if ! IE]> <![endif]>(FROMu-COM)

<![if ! IE]> <![endif]>CLOCK (FROMu-COM)

76

77

67

69

71

74

73

65

57

45

43

42

46

System

V.H/SW30

80

(FROM u-COM)

C-CCD

55

X-tal

Serial Cont

6dB

V.ENV

83

VCO/OSC

interface

AMP

CLOCK Drive

53

(TO u-COM)

85

REC-AMP

C-

49

SP CH1

SQUELCH

SP CH2

Y-CCD

86

51

SP CH2

REC-AMP

MIX

29

V. OUT

System

87

SP CH1

Main

APC/ACC

AMP

(TO u-COM)

VCA

CCD LPF

Conv2

DET

D-V SYNC

CTL Trap

SQUEL CH

28

System

2M LPF

ACC

C LPF

DEALY

(FROM u-COM)

fh Trap

L- DET

BPF

BD

C.K

HIFI Trap

89

Main

EP CH1

REC-AMP

CLEAR

Conv1

90

EP CH2

SYNC

DEMO

Main

NL

TRAP

FM AGC

P.EQ

G.EQ

D LIM

Y LPF

CLAMP

S LPF

De-Empf

De-eMPH

SYNC SEP

31

629K

REC-AMP

EP CH2

EP CH1

91

Sharpness

FBC

YNR

NC

30

CONTROL

Video ALC

IC301					CLAMP
							LPF	32
HA118725
10	8	9	33	35	37	38	40	36
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<![endif]>PAL/MESECAM/NTSC_DIAGRAM BLOCK Y/C .5

<![if ! IE]>

<![endif]>28-3

<![if ! IE]>

<![endif]>29-3

				<![if ! IE]> <![endif]>System	<![if ! IE]> <![endif]>System
				<![if ! IE]> <![endif]>CLOCK (FROM u-COM)	<![if ! IE]> <![endif]>DATA (FROM u-COM)
46	57	45	65	73	74	67	69	71

55

C-CCD

IC301

Serial Cont

X-tal

80

HA118725

CLOCK Drive

interface

VCO/OSC

53

JCA

L-DET

(-4dB)

49

APC/ACC

REC-AMP

85

Y-CCD

DET

Main

C-LPF 2

CCD

f0=1.68M

SP CH2

86

Conv2

LPF

51

B.E

MIX

REC

ACC

SPF

LPF

C.K

ATT

Trap

System

V. OUT

29

6dB

Main

C-LPF 1

REC-AMP

(TO u-COM)

AMP

Conv2

SP CH1

87

System

D-V SYNC

28

SQUEL CH

(TO u-COM)

HPF

FBC

Main

FM

629K

D.E.

NL Emph

REC FILTER

VCA

CLEAR

TRAP

ALC

Emph

MOD

SYNC

89

30

FBC

f/0DEV

REC-AMP

Adjst

EP CH2

32

Video ALC

90

VIDEO

YNR

REC-AMP

AGC

EP CH1

91

					AGC DET					SYNC
										SEP
ATT	ATT	ATT				LPF	CLAMP		CLAMP
-10dB	-10dB	-10dB
19	15	17	18	36	40	38	37	23	26	14	9	8	11

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<![if ! IE]>

<![endif]>+

++

<![if ! IE]>

<![endif]>VIDEO IN

<![if ! IE]>

<![endif]>LINE 1

System V.H/SW30

(FROM u-COM)

SP CH1

SP CH2

EP CH1

EP CH2

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<![endif]>Mode REC 2)