Service Manuals, User Guides, Schematic Diagrams or docs for : LG VCR L214-216-217-218 EL172W_BLOCK
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BLOCK DIAGRAMS
1. POWER(SMPS) BLOCK DIAGRAM
RECTIFIER & 12 REG BLOCK
T101 !
SMOOTHING
R101 TRANSFORMER (Q152, ZD152, C155, Hi-Fi
(D105, C115, R112, J151) C152, R152) OPTION
SNUBBER 6 7
RECTIFIER &
BD101 BLOCK
+ SMOOTHING TO SYS
C103 (D102, R104, 12VA(Cap)
(D108, C120,
C105, C106) D152
4 8 L104, C121)
TO SYS
13VA(DRUM)
11 D151
LINE FILTER
! BLOCK TO Hi-Fi BUFFER
J152 13VA
(C101, L102, C102) DRIVE & S/W 10 RECTIFIER & (MONO OPTION)
BLOCK SMOOTHING
(IC101, C109, D103, R103, C129, (C116, D106,
R109, R125, R126, C135, BC101) L103, C117)
F101 11 TO AVCP, OSD
! 3 5V S/W 5.1V
BLOCK
(Q155, R156, R157)
2
BK WH
(BR) (BL) 1 5V S/W TO SENSOR MOD
! PW101 4 FEED-BACK BLOCK 5.1V
HOT GND
BLOCK
(Q157, R170, R171)
!
3 (R116, R117, R118,
C113 C112
IC102 ! 2 R119, R120, R121,
! C114)
HOT CIRCUIT IC103
PWR CTL
FROM SYS
P.CTL "H"
BLOCK
(Q156, R161)
TO SYS, MOD
NOTES : Symbol denotes AC ground. 5.3VA
Symbol denotes DC chassis ground.
3-16 3-17
1) PB MODE
IC301 IC801
HA118717 AN3663
A. OUT (L)
R/P HEAD 46
2 EQ
N.A.IN VCA A. OUT (R)
AMP 11 62 OUTPUT 45
1 SELECTOR
MOD A.OUT
41
EQ
100
7 8
DATA
CLOCK From u-COM (System)
4. NORMAL AUDIO BLOCK DIAGRAM (HI-FI MODEL ONLY)
3-22
3-23
2) EE MODE
IC801
AN3663
NORMAL
AUDIO
61
OUT 9 VCA DET
62 11
A.OUT"R"
53
TO
A.OUT"L" JACK
57
REC 81
AMP R/P
59 TO MOD
HEAD
9 14
LINE 1 "R"
LINE 1 "L"
5. AUDIO BLOCK DIAGRAM(MONO MODEL ONLY) 6. Y/C BLOCK DIAGRAM
1) PB Mode 1) PB Mode
System
System
(FROM u-COM)
(FROM u-COM)
CLOCK
DATA
X302 X301
79 78 75 73 71 63 62 69 60 58 35
System V.H/SW30 81
(FROM u-COM) C-CCD 46
X-tal Serial Cont
V.ENV 84 VCO/OSC interface
(TO u-COM) CLOCK Drive 44
86
REC-AMP 39
SP CH2
SP CH2 Y-CCD
87
VCA AMP 11 AUDIO OUT 42
88
REC-AMP MIX V. OUT
SP CH1 52 System
SP CH1 AMP (TO u-COM)
89 Main APC/ACC
VCA CCD LPF Conv2 DET
CTL Trap D-V SYNC
SQUEL CH 51 System
2M LPF ACC fh Trap C LPF DEALY L- DET BPF BD C.K (FROM u-COM)
HIFI Trap
Main
CLEAR
DET Conv1
SYNC
DEMO Main NL
TRAP FM AGC P.EQ G.EQ D LIM Y LPF CLAMP
IC301 S LPF De-Empf De-eMPH
SYNC SEP 50
C-SYNC
(TO u-COM)
System
HA118717 YNR NC
Sharpness
CONTROL
FBC
Video ALC
56
PB EQ IC301
CLAMP
AMP 2 LPF
R/P HEAD HA118717
22 13 14 18 19 23 24 26 21
+
+
2) REC Mode 2) REC Mode
System
System
(FROM u-COM)
(FROM u-COM)
CLOCK
DATA
REC 4 35 58 60 69 62 63 71 73 75
AMP R/P HEAD
46 C-CCD IC301 Serial Cont X-tal
44 CLOCK Drive HA118717 VCD
interface VCO/OSC
81 System V.H/SW30
L-DET (FROM u-COM)
(-4dB)
39 APC/ACC
Y-CCD DET Main CCD f0=1.68M
C-LPF
Conv2 LPF
42 B.E MIX REC
LPF
VCA AMP 11 AUDIO OUT ACC SPF C.K ATT Trap
V. OUT 6dB Main
System 52 C-LPF 86
(TO u-COM) AMP Conv2
REC-AMP
D-V SYNC SP CH2
System 51 SQUEL CH SP CH2
(TO u-COM) 87
(From REAR Jack) D.E. NL Emph FBC Main FM LPF HPF TRAP VCA
CLEAR ALC Emph MOD
A.IN SYNC
REC-AMP
88
8 f/0DEV SP CH1
SP CH1
FBC 89
DET Video ALC Adjst
Y-LPF
IC301 VIDEO
AGC
YNR
HA118717 AGC DET SYNC
SEP
LPF CLAMP CLAMP
ATT ATT ATT
-10dB -10dB -10dB
31 29 21 26 24 23 18 19 50 22 20 14 13 15
(TO u-COM)
+
C-SYNC
+ + +
VIDEO IN
System
LINE
3-24 3-25
(PB MODE)
SW
Hi-Fi NOISE
Head
22
TO JACK
R CH AUDIO PNR OUT A.OUT(R)
SW FM LIM AMP 53
BPF LIMIT R CH SELECT SW
TO TU/IF
24 MOD A.OUT(R)
59
TO JACK
L CH AUDIO PNR OUT A.OUT(L)
AMP 57
BPF LIMIT L CH SELECT SW
SW
NOISE
From IC301(AVCP)
Normal Audio IN
8. Hi-Fi BLOCK DIAGRAM (Hi-Fi MODEL ONLY)
62
A.ENV
28
3-28
3-29
(REC MODE)
LINE 1 LINE 2
14 15
DEM DBX INPUT PNR AUDIO REC
48 NOISE MATRIX VCO
BLOCK REDUCTION SW(L) L CH LIMIT LPF
AGC 21 Hi-Fi
HEAD
INPUT PNR AUDIO REC
VCO
SW(R) R CH LIMIT LPF
9 10
LINE 1 LINE 2
10. SYSTEM BLOCK DIAGRAM
DPG/FG
SLIDER BLOCK
IC501
HD3977
ENA
CLK
96 POWER CST.IN PLAY REC LP STANDBY
DATA EP
98
99
RC501
L501
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