Mitsubishi Electric LT-37131 Service Manual page 41

1 2 3 4
PG 1.....BLOCK
A
B
C
D
VR
E
1 3 5 7 9 13 17 19 21 23 25 27 29 31 33 35 37 41
11 15 39 1 3 5
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 2 4 6
F
ANT
RELAY
G
H
PWB-DM
I
J
K
L
M
N
O
5 6 7 8
1 VINV
2 VINV
3 VINV
4 VINV
5 VINV
6 GND
7 GND
46"Only
8
GND
9
GND
10 GND
11 N.C.
12 INV/SW
13
Bright
14 N.C.
INVERTER
1 VINV
2
VINV
3 VINV
4 VINV
5 VINV 37"Only
6 GND
7 GND
8
GND
9 GND
10 GND
VT PJ PG E-H
V-H
1 2 3 4 1 2 3 4 5 6 7
7 9 11 13 15 17 19
8 10 12 14 16 18 20
MAIN-V 50 1
GND 49 2 GND
MAIN-H 48 3 MAIN-H
GND 47 4 GND
MAIN-PR 46 5 MAIN-PR
GND 45 6 GND
MAIN-PB 44 7 MAIN-PB
GND 43 8 GND
MAIN-Y 42 9 MAIN-Y
41
GND 10 GND
SUB-V
40 11 SUB-V
GND
39 12 GND
SUB-H
38 13 SUB-H
GND 37
14 GND
SUB-PR/C
36 15 SUB-PR/C
GND
35 16 GND
SUB-PB
34 17 SUB-PB
GND 33
18 GND
SUB-Y
32 19 SUB-Y
GND
31 20 GND
TU1-CV
30 21 TU1-CV
GND 29 22
GND
DM-CV 28 23
DM-CV
GND 27 24
GND
TU1-L 26 TU1-L
25
GND 25 26 GND
PWB-E2P
TU1-R 24 27 TU1-R
GND 23 28 GND
DM-L 22 DM-L
29
GND 21 30 GND
DM-R 20 31 DM-R
E2P
GND 19 32 GND
MN-L 18 MN-L
33
GND 17 34 GND
MN-R 16 35 MN-R
GND 15 36 GND
AVR-L 14 37 AVR-L
GND 13 38 GND
1 2 3 4
AVR-R 12 39 AVR-R
GND 11 40 GND
EP MN-CCD 10 41 MN-CCD
GND 9 42 GND
EP SB-CCD 8 43 SB-CCD
GND 7 44 GND
GND 6 45 GND
1 2 3 4
GND 5 46 GND
GND 4 47 GND
GND
3 48 GND
GND 2 49 GND
GND 1
50 GND
G+VID 50 1 G+VID
GND 49 2 GND
MANRST 48 3 MANRST
KSC1 47 4 KSC1
KSC0 46 5 KSC0
GND 45 6 GND
IR-IN 44 7 IR-IN
GND 43 8 GND
PWRLED 42 9 PWRLED
RMC 41 10 RMC
STATUS-G 40 11 STATUS-G
STATUS-R 39 12 STATUS-R
N.C. 38 13 N.C.
37
MUTESPKR2 14 MUTESPKR2
GND 36 15 GND
3DRST 35 16 3DRST
FREERUN 34 17 FREERUN
33
AT-L 18 AT-L
AT-R
32 19 AT-R
AC-OFF
31 20 AC-OFF
MAIN-RELAY MAIN-RELAY
30 21
PANEL-PWR 29 22
PANEL-PWR
N.C. 28 23
N.C.
BRIGHT 27 24
BRIGHT
26
INV-SHORT 25 INV-SHORT
INV-RELAY 25 26 INV-RELAY
INV-PWR 24 27 INV-PWR
INV-SW 23 28
INV-SW
INPUT-DET0 22 INPUT-DET0
29
INPUT-DET1 21 30 INPUT-DET1
MUTE-MNT 20 31 MUTE-MNT
MUTE-AVR 19 32 MUTE-AVR
MUTESPKR 18 MUTESPKR
33
AVR-DET 17 34 AVR-DET
N.C. 16 35 N.C.
N.C. 15 36 N.C.
GND 14 37 GND
SD-MN 13 38 SD-MN
GND 12 39 GND
SD-SUB 11 40 SD-SUB
GND 10 41 GND
5VSDA 9 42 5VSDA
GND 8 43 GND
5VSCL 7 44 5VSCL
GND 6 45 GND
STBY-ON 5 46 STBY-ON
AT-DIR-IN 4 47 AT-DIR-IN
STAND-DET 3 48 STAND-DET
GND 2 49 GND
1
GND 50 GND
GND 1 1 GND
2 2
3.3VB 3 3.3VB
3
GND
GND 4 4
GND 5 5 GND
5VSB 6 6 5VSB
GND 7 GND
7
9VB
9VB 8 8
GND 9 9 GND
12VSB 10 12VSB
10
E E
1 2 3 4 5 6
AT
AT
1 2 3 4 5 6
PWB-AT-SW
1 2 3 4 5
AM
SMP
6P
AM1
6P
37"Only
SMR
4P
4P
M
9 10 11 12
LCD-MODULE
PANEL
CONTROL
46" Only 37" Only
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
CN1 CN1
PWB-SIGNAL
7 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 1 2 3 4 5 6
AN LE
PA-H PA-H PA-H
PA-H AN2 PA-H AN1 PA-H LE PA
7 1 2 3 4 5 1 2 3 4 5 6
1 2 3 1 2 3 4 5 6 7 8
PWB-PREAMP
PWB-LED
PWB-FRONT
6
PA-H
13 14 15 16
17
Von 1
Reserved
2
37"Only Reserved 3
Vbrt 4
Reserved
5
GND
6
VINV 1
VINV 2
VINV 3
VINV 4
37"Only VINV 5
GND
6
GND 7
GND 8
GND 9
GND 10
INVERTER
VINV 1
2
VINV
VINV 3
VINV 4
VINV 5
37" Only
GND 6
46"Only
GND 7
GND 8
GND 9
GND 10
2 4 6 8 12 14 16 N.C.
50 10 18 20 11
49 51 1 3 5 7 9 11 13 15 17 19
INV/SW 12
CN2
Bright 13
N.C. 14
E
PG PJ V
1 2 3 4 5 6 7 1 2 3 4 1 2 3 4 5
E E
21VAUD 21VAUD
21VAUD
21VAUD
A-GND
A-GND
A-GND A-GND
PA PA
GND GND
AC-OFF
AC-OFF
MAIN-RELAY MAIN-RELAY
GND GND
PANEL-PWR PANEL-PWR
N.C. N.C.
BRIGHT BRIGHT
GND GND
INV-SHORT
INV-SHORT
INV-RELAY INV-RELAY
INV-PWR INV-PWR
INV-SW
INV-SW
GND GND
1 2 3
PS
7 8 9 10 11 12 1 2 3 4 5
V
CE
PA-H ES E
SMR
CE PA
ES1
7 8 9 10 11 12
SMP
R_OUT+
R_SP
R_OUT-
L_OUT-
L_SP
L_OUT+
18 19 20 21
* NOTES
1. DC voltages were measured from points indicated to the circuit
ground with a high-Z voltmeter
2. Wave form were taken with standard color bar signal.
3. TP13.etc. show test points.
4. CAPACITOR
Value Not indicated PF, for numbers more than 1
uF, for numbers less than 1
Dielectric
strength Not indicated : 50V
No tolerance is indicated
Not indicated = +/- 10% for electrolytic capacitor
and +/- 20%
Tolerance
G=+/-2% P=+100% Q=+30% C=+/-0.25PF
J=+/-5% -0% -10% D=+/-0.5PF
K=+/-10% Z=+80% T=+200% F=+/-1PF
M=+/-20% -20% -0% D=+/-2PF
Not indicated : Ceramic capacitor
MF : Polyester capacitor
PP : Polypropylene film capacitor
ALM
: Aluminus electrolytic capacitor
TF
Parts : Twin film capacitor
except SC : Semiconductor Ceramic capacitor
Type
I for MP : Metalized paper
chips
MPP : Metalized plastic film capacitor
MMF : Metalized polyester capacitor
: Polyester polypropylene film
MF,PP
capacitor
PS : Styrol capacitor
TAN TANT : Tantalum capacitor
or
+ : Electrolytic capacitor
NP : Non polarized electrolytic
capacitor
Not indicated : Ceramic capacitor chip
II chips +
: Electrolytic capacitor
NP : Non polarized electrolytic
capacitor chip
Not indicated : F or B (high dielrctric percentage)
Characteristic
(Only ceramic
capacitor) CH, SL, etc. : Temperature compensaing types
5. RESITOR
Not indicated = Ohm
K = 1,000 Ohm
Value
M = 1,000,000 Ohm
Parts except Not indicated = 1/4W or 1/6W
Wattage for chips
PD PA PF PA
Chips Not indicated = 1/10W
6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12
Not indicated = +/-5%
Toler
ance D = +/-0.5% J = +/-5%
F = +/-1% K = +/-10%
Not indicated : Carbon resistor
S : Fixed composition resistor
Parts
Type MB : Metal oxide film resistor(Type B)
except
I CE : Cemented resistor
for
W : Wire wound resistor
chips M : Metal film resistor
MP
: Metal plate cement resistor
ML : Metal liner resistor
II chips Not indicated : chip resistor
6. This is a basic schematic diagram. Some sets may be subject
to modification according to engineering improvement
SHADED COMPONENTS HAVE SPECIAL CHARACTERISTICS
IMPORTANT TO SAFETY. BEFORE REPLACING ANY OF
THESE COMPONENTS, READ CAREFULLY THE PRODUCT
SAFETY NOTICE IN THE SERVICE MANUAL. DON'T
DEGRADE THE SAFETY OF THE RECEIVERS THROUGH
IMPROPER SERVICING.
SERVICE TECHNICIAN WARNING;
X-RADIATION PRECAUTION
PWB-POWER
THIS PRODUCT INCLUES CRITICAL ELECTRICAL AND MECHANICAL
PARTS ESSENTIAL FOR X-RADIATION PRORECTION
TO AVOID POSSIBLE TO X-RADIATION TAKE RADIATION PROTECTIVE
MEASURE FOR PERSONNEL DURONG SERVICING.
SEE SERVICE INSTRUCTION FOR SPECIFIED REPLACEMENT
PARTS AND SERVICE ADJUSTMENTS.
CONTENTS LT-37131 VLP33
LT-46131 VLP33
PG 1.....BLOCK
LT-37132 VLP33+
PG 2.....POWER
LT-46231 VLP33+
PG 3.....SIGNAL1 [TERMINAL]
PG 4.....SIGNAL2 [VIDEO SW / AUDIO AMP]
PG 5.....SIGNAL3 [3DYC / NTSC DECODER]
PG 6.....FRONT, E2P, AT-SW, PREAMP
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