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LB 3000
SERVICE MANUAL
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AC OUT2 A AC OUT1
PC102 103Z/1KV 5 1 2 K101 Relay 3 4 D101 1N4148 A 47(1/4W) R103
D102 HER104 D105 1N4007 C120 FUSE 101 1 AC OUT1 AC IN 1 1 B 2 2 1 2 C104 0.1uF/275V T102 LIF001 2 D106 1N4007 D108 C121 3 4 1N4007 D109 HER107 D107 1N4007 + EC103 C101 47uF/400V103pF/400V 5 R106 82K/2W
100uH L101 +30V + + EC105 47uF/50V 22UH L103 +22V + EC107 470uF/35V L102 22uH + C105 102P C106 104P B C102 104P
4
3
AC OUT2
2
. . . . . . .
4 7 3 8 2 9 10 1 EF25 C108
T101 6 5 6
EC104 47uF/50V D103 HER104 EC106 470uF/35V
7
3
4
8
E + R128 10K B
C PQ102 B772-Y 1N4007 D113
9 D104 HER104 + EC102 470uF/16V EC101 470uF/16V
+12V
1 L104 JW-7.5MM R107 470K / 1/2W D10 18V 1 R109 1 2 5.1 2 1N4148 D9
10 D110 SR160
+5V
R125 2.2K
471K/250V PR103 47K R126 10k Q105 2PD601AS
R108 220K/1/2W
PWR (From sheet 2)
PR101 2.2K
PQ104 2PD601AS
EC108 47uF/35V C
+
7 VCC 1 C109 474P Softst FB 2
4
5 2A165 DRAlN R105 10K 2 1 1 R119 360 C116 104P C115 104P L106 7.5MM LNB A (To sheet 3) +5V C
U100 ICE2A0565 Isense 3 R110 0.51/ 1/2W R111 22 GND 8 EC110 1000uF/16V + EC109 1000uF/16V + C107 104P L105 10UH +5V R121 4.7K(1/4W) +22V 3
U502 LM317 2
10K R127
D112 1N4007 1
1
2
2
R122 3.6K
2.2K R102 C103 104P
PWR (From sheet 2)
2SC1162
Q103 2PD601AS
D104 1N4148
R124 2.7K LNB CHK (To sheet 2) Q101 2PD601AS
Q102 R116 10K 1%
C110 2.2nF
U101 PC817 4 3 1 2
2
R115 1K
C111 682P 1 + U102 KA431
C117 104P R116 10K 1%
3
R101 2K
H/V (From sheet 2)
D 2
1
R123 2.7K
Q104 2PD601AS 1
2 C106 104P
R113 620
R114 10K
R112 10K 1% 1
R124 2.7K
2
R127 100K
R126 10K
D
LB 3000
Title Size
4.7nF/250V C112
POWER
Number 2006-9-25 D:\PCB02\..\1.POWER.SCHDOC 7 Sheet1 of 6 Drawn By: 8 Revision
C113 4.7nF/250V 1 2 3 4 5 6
A3 Date: File:
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R205 R206 10K 10K +5V A KEY IN (To sheet 2) PWR (To sheet 1) H/V (To sheet 1) 0/12V (To sheet 3) R232 560 R234 220
R209 10K R261 10K
EC201 10uF/16V +5V
+
10 9 8 7 6 5 4 3 2 1
U201
1 2 3 4 P1.0 P1.1 P1.2 P1.3 40 0.0 0.1 0.2 0.3 5 6 7 8 P1.4 P1.5 P1.6 0.7 LNB CHK (To sheet 1) P1.7 31 30 9 0.4 0.5 0.6 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26
C201 104P 5MM R211 +5V SEG_A (To sheet 6) SEG_F (To sheet 6) SEG_B (To sheet 6) SEG_G (To sheet 6) SEG_C (To sheet 6) SEG_H (To sheet 6) SEG_D (To sheet 6) SEG_E (To sheet 6)
A
+12V R235 470
SCL (To sheet 3) SDA (To sheet 3)
R237 56K Q201 2PD601AS R239 15K R236 1K
+
R238 15K R240 20K R224 10K
R223 10K
R222 10K EC204 470uF/16V VOL (To sheet 3)
B
9
29 2.7 2.6 2.5
B
R242 20K
SAT/TV (To sheet 5) CH SW (To sheet 5) R/C
10 11 12 13 14 15 16
3.0 3.1 3.2 2.4 3.3 3.4 3.5 3.6 3.7 R202 1.5K R249 20K R247 20K 25 R245 20K
+12V R226 10K R201 1.8K R252 EC205
+ +
Q204
EC207 220uF/25V
C202 104P
R228 10K R251 R230 10K A-OUT (From sheet 3) 3.3K R250 20K
EC206 1uF/50V
+
560K
2PD601AS
ML201 333P 1uF/50V
Q202 2PD601AS R253 1.5K R203 1K Q203 2PD601AS
+
C
PULSE (To sheet 3) 4MHz OUT (To sheet 3)
17
AUDIO MOD (To sheet 5)
C205 27P C206 27P
18 X201 4.00MHZ 19 20
18
2.3 2.2
24 23 22 21 D0 (To sheet 6) D1 (To sheet 6)
PJ AUDIO OUT R233 560
C
EC208 10uF/25V
19 20
2.1 2.0
STC89C52RC
IR201 IRM8751
SEG-A +5V 1 3 1 R/C SEG-F 2 2
POWER
4
SW201 1-35
3 KEY IN
CH-UP
4
SW202 1-35
3
D
C203 104P
CH-DOWN
SEG-B 4
SW203 1-35
3
LB 3000
Title Size Orcad B Date: File: 2006-9-25 D:\PCB02\..\2.CPU.SCHDOC Sheet 2 of 6 Drawn By: 6
D
CPU. AUDIO OUT
Number Revision
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A
+12V R301 8.2K R305 1.8K B.B OUT (From sheet 3) C301 104P Q301 2PD601AS C307 121P R310 75 C308 100P C309 102P C305 68P C304 68P L301 10uH R307 4.7K Q302 2PD601AS CF301 1 2 3 R312 1K C302 104P R316 150 5.8MHz C310 102P 47uF/16V EC302 + C315 223P R303 390 + EC301 100uF/25V R306 100 4
T301 RF042 3
A
2 C322 C314 36P
R309 3.9K
C306 68P
R302 8.2K
R311 1.5K
L302 4.7uH
L303 4.7uH
R304 390
L304 4.7uH
R317 330
B 14 13 12 11 10 9 8
A OUT (To sheet 2)
1 C323 36P
B
U301 TDA120U + 1 2 3 4 5 6 7
IF301
EC303 10uF/16V 2
1 2 LNB A (From sheet 1) 3 4 5 6 7 104P C303 1 B.B OUT (To sheet 3, 4) 2 8 9 10 11 12 +30V 1 R314 1K C317 104P/50V 2 2 C318 104P/50V SCL (From sheet 2) SDA (From sheet 2) 1 1 C319 27P 1 1 13 14 15 16 C320 27P C321 27P
LNB B
1
C316 202P
LNB A
A/B SW
+5V
TU NER 1
R308 4.7K
VOL (From sheet 2)
R320 5.1(1/4W) +5V
C +5V EC305 1000uF/10V
5V B.B OUT TV/S AT SW 30V SCL SDA 4MHZ IN
EC304 1000uF/10V Q303 2N4403 +12V R318 10K R323 1K(1/4W)
134V-01 S301 1 5V GND 2 12V Pulse
C 4 3 R322 100(1/4W) Q304 2SC2412 C311 102P PULSE (From sheet 2) R321 2.2K(1/4W)
R313 1K R319 10K 0/12V (From sheet 2) Q305 2SC2412
R324 2K
2
1
2
C312 30P
D
4MHZ OUT (From sheet 2)
2
2
LB 3000
Title Size Orcad B Date: File: 2006-9-25 Sheet3 of 6 D:\PCB02\..\3.AUDIO(TBA120U)+TUNER.SCHDOC Drawn By: 6
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AUDIO. TUNER
Number Revision
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+12V 2 1 C401 104P R416 820 2 J401 5MM
1
1
A
R404 10K 2
R410 10K
R402 1.8K 1
+
R406 150
R412 1K
A
2
EC405 100uF/16V B.B OUT (From sheet 3) B
+
EC403 10uF/16V C Q410 2PD601AS E
Q403 2SA1162 Q404 2PD601AS C B VR401 1K R417 680 R421 330 R420 470 R419 1K 1 E 2 C402 36P Q405 2PD601AS
B E
R424 5MM 2 L401 100uH R425 560 B 1 R427 9.1K 2
1
C
B R413 1K R405 47 R407 150 R408 150 R428 39 1 ML401 472P EC406 100uF/16V R411 10K
2
+12V 1
+
EC401 47uF/16V 2
C404 104P Q401 2SA1162 B E
C B
C
E
R431 5.1K
R432 15K
R422 330 B C B E Q407 2PD601AS
C
B R409 150 R414 1K C406 180P 1 2 C407 300P 1 2 E
Q408 2PD601AS
C
E
C
Q411 2PD601AS
L402 2.7uH
L403 2.7uH
Q402 2SA1162
C
E
1
C408 224P
C
Q409 2PD601AS B
C403 104P R418 820 B 1 E 2 1 Q406 2PD601AS R401 C411 220 EC407 102P 1U/50V
+
C
2 EC404
+
2
75 1 R403
2
1
1
C405 33P
2
C409 150P
C410 200P
R415 1K
R433 150K
R434 4.7K
+
EC402 47uF/16V
R423 330
R426 560
PJ VIDEO OUT
2
2
470uF/16V
R429 120 2 2
V MOD R430 (To sheet 5) 180K
1 1
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1
LB 3000
Title Size Orcad B Date: File: 1 2 3 4 5 2006-9-25 D:\PCB02\..\4.VIDEO.SCHDOC Sheet 4 of 6 Drawn By: 6
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VIDEO
Number Revision
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PJ 501 ANT IN A
C505 39P
C507 22P L501 L994 L506 L1009
C508 27P
C509 47P
TV OUT PJ 502 A
L502 L384-2
L503 L995
Q501 2735
Q502 2735
L504 L996
L505 L-384-1
C506 100P Q503 2735 R501 390 R502 390
B
R505 3.3K 33P C514 36P C560
C511 10P
R506 2.2K 33P C515 36P C561
C512 10P
C510 102P
CH SW (From sheet 2) V MOD (From sheet 4) R509 180 B L507 L993
R503 100 C517 6P C504 33P C519 15P
L508
L1201
L509
L1200
R507 2.2K C501 102P
82P C516 10 9 U501 HA11585
8 7
16
15
14
13
12
16
15
14
13
12
11
10
6
U1
3 4
11585
5
11
1
2
1
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7
ZD5V D501 C +12V
R510 56(1/2W)
+
1
2
3
4
5
6
7
C522 EC501 47uF/16V C502 102P C521 103P SAT/TV (From sheet 2) R512 5.1K R504 10K
+
8
8
9
C C513 10P RF501 RF042 4 R511 300
D502 ZD5V
EC502 1uF/50V
C520 36P
1 R508 2.2K 3 R513 68K 5
+
6
C503 102P
EC503 10uF/25V
AUDIO MOD (From sheet 2)
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2
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LB 3000
Title Size Orcad B Date: File: 1 2 3 4 5 2006-9-25 D:\PCB02\..\5.RF 11585.SCHDOC Sheet 5 of 6 Drawn By: 6
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MODULATOR. RF SWITCH
Number Revision
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A +5V
R601 47
A
R602 2.2K D1 (From sheet 2) R603 2.2K D0 (From sheet 2)
D0 D1
E
B C
Q601 2SA1162
E B C Q602 2SA1162 DSP601
10
JP600 B 1 2 3 4 5 6 7 8 9 10 11 12 PIN072
DSP-A502-10B/W B
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6
4
1
3
8
5 9
R604 150 SEG-A (From sheet 2) SEG-B (From sheet 2) SEG-C (From sheet 2)
SEG-A
R605 150
SEG-B
C
2
C R606 150
SEG-C
R607 150 SEG-D (From sheet 2) SEG-E (From sheet 2)
SEG-D
R608 150
SEG-E
R609 150 SEG-F (From sheet 2) SEG-G (From sheet 2) SEG-H (From sheet 2) D
SEG-F
R610 150
SEG-G
R611 150
SEG-H
LB 3000
Title Size Orcad B Date: File: 2006-9-25 D:\PCB02\..\6.DISPLAY.SCHDOC Sheet 6 of 6 Drawn By: 6 Number
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LED DISPALY
Revision
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1. NO VIDEO
No Video
Check Power ckt
Check LNB signal, LNB H/V voltage, Video frequency
NG Check Tuner Pin3: 13/18V Pin9: +5V Pin13: +30V
OK
OK
NG
Check Tuner Pin14 (SCL) Pin15 (SDA) Pin16 (4MHz) NG Check U201 Pin5 (SCL) Pin6 (SDA) Pin18 (4MHz) (Sheet 2 of 6) Change Tuner Check EC405, R404, R427, R424, R413, Q410 (Sheet 4 of 6)
OK
Check Tuner Pin10 B.B OUT (Sheet 3 of 6) OK Check Q410 Emitter (Sheet 4 of 6) OK Check Q404 Base (Sheet 4 of 6) OK Check Q403 Collector (Sheet 4 of 6) OK Check Q405 Collector (Sheet 4 of 6) OK Check Q411 Emitter (Sheet 4 of 6) OK Check Q408 Emitter (Sheet 4 of 6) OK Check Q402 Collector (Sheet 4 of 6) OK Check Q406 Emitter (Sheet 4 of 6) OK Check PJ Video Out OK Video output OK NG
NG
Check R405,L401,R425,R407,R408,R428, ML401,EC406,R411,R410,R402,R406 (Sheet 4 of 6) Check R416,Q404,R421,R417, VR401,J401,Q403,R420 (Sheet 4 of 6)
NG
NG
Check Q405 Base,Emitter,R412,R419 (Sheet 4 of 6)
NG
Check Q411 Base,Collector, R414 (Sheet 4 of 6) Check Q408 Base,Collector,R415,R409, L402,L403,C406,C407,C405,C409,C410 (Sheet 4 of 6) Check Q401,Q409,Q407,C408,R415, R433,R431,R432,R434,R422,R423, R418,R426 (Sheet 4 of 6)
NG
NG
NG
Check Q406 Base,Collector,C411,R401, R429 (Sheet 4 of 6)
NG
Check EC404,C403,R403 (Sheet 4 of 6)
1
2. NO AUDIO
No Audio
Check Q301 Base,R305,C306 Check Q301 Emitter (Sheet 3 of 6) OK Check Q302 Base,R310,C307,C308, Check Q302 Collector (Sheet 3 of 6) OK Check U301 Pin8 (Sheet 3 of 6) OK Check Q203 Collector (Sheet 2 of 6) OK Check Q202 Collector (Sheet 2 of 6) OK Check Q204 Emitter (Sheet 2 of 6) OK Check PJ Audio Out (Sheet 2 of 6) OK NG Check EC208,R223 (Sheet 2 of 6) NG Check Q204 Base,R201,R203 (Sheet 2 of 6) NG Check R252,R201,R253,EC206 (Sheet 2 of 6) NG Check Q203,U201 Pin23,R251,EC205, ML201 (Sheet 2 of 6) NG NG C309,C305,C304,L301,L302,L303, L304,R304,R307,R312,R303,C302, R316 (Sheet 3 of 6) Check R306 (Sheet 3 of 6) Check U301 Pin11 is 12V Pin4 about 4V, Pin5 about 5V OK NG Check Q201,R235, R236,EC204,R222 (Sheet 2 of 6) OK Change Q302 NG C301,R301,R302,R311 (Sheet 3 of 6) OK Change Q301
Check CF301,C310, R317,C315,T301,R309, C314,C323 (Sheet 3 of 6)
OK
Change 204
Audio output OK
2
3. LNB Short Circuit
LNB short
Remove Q101 (Sheet 1 of 6)
NG
Check U201 Pin8 5V (Sheet 2 of 6) OK
NG
Check R105 (Sheet 1 of 6)
OK
Change U201
Remove LNB cable and check Tuner IF IN 13/18V
NG
Check U502 Pin2 (Sheet 1 of 6) OK
NG
Check U502 Pin3 22V (Sheet 1 of 6) OK
NG
Check D103,L103,EC106, EC107,C105,C106 (Sheet 1 of 6)
OK
Check D112,L106 (Sheet 1 of 6)
Check R119,R122,R123 R124 (Sheet 1 of 6) OK
Check Q102 Base > 5V (Sheet 1 of 6)
NG
Check R104,R116,R127 (Sheet 5 of 6)
Check Q104 Base 0V (Sheet 1 of 6) OK
NG
Check U201 Pin2 0V (Sheet 2 of 6) NG Change U201
OK Change U502 Check Q102 Collector 0V (Sheet 1 of 6) OK Add Q101 NG Change Q102
Check Q101 Collector 5V (Sheet 1 of 6)
3
4. NO LED DISPLAY
NO LED DISPLAY
Check voltage of C104 ( Sheet 1 of 6)
NG
Check AC IN, FUSE
OK
OK
Check voltage of JW134 is 12V Check voltage of JW137 is 30V Check voltage of JW147 is 18V or 13V Check voltage of JW138 is 5V (Connections between power and main board) OK
NG
Cut JW134,JW137,JW147,JW138 and check voltage again OK
Check all connection wire on the main board
Check U201 Pin40, 31 is 5V (Sheet 2 of 6) OK
NG Check connection of 5V
Check U201 Pin32 ~ 39 , 21 ~ 22 (Sheet 2 of 6) OK
NG Change U201
Check Pins of Q601,Q602,LED (Sheet 6 of 6) OK
NG
Check connection of +5V, Q601,Q602,D0,D1,SEG-A~H OK
NG Change LED Change Q601,Q602
4
5. NO POWER
No Valtage Check voltage of EC103 (Sheet 1 of 6) OK Check D110,L105,EC110, EC109,C107,R121 (Sheet 1 of 6) Check impedance between U100 Pin 1 and Pin 8 about 80K, Pin 1 and Pin 2 about 50K. (Sheet 1 of 6) OK Check D9,D10 (Sheet 1 of 6) OK No Voltage 30V Check U101,U102 (Sheet 1 of 6) OK Cut wire of JW137 OK Check connection of 30V on the mainboard. NG
Check D102,L101, EC104,EC105,C102 (Sheet 1 of 6)
NG
Check FUSE,T102,D105, D106,D107,D108 (Sheet 1 of 6)
Check 5V Voltage
NG
OK
NG
Change U100
OK
Change T101 (Sheet 1 of 6)
No Voltage 12V Check D104,L102,EC101, R128,PQ102,PQ104, Q105,D113,PR101, PR103,R126,R125 (Sheet 1 of 6)
NG Cut wire of JW134 OK Check connection of 12V on the mainboard.
Check U201 pin 2 is 0V (Sheet 2 of 6) NG Change U201 (Sheet 2 of 6)
OK
OK
Change T101 (Sheet 1 of 6)
No Voltage 13/18V
OK Check Voltage 22V
Check U502,D112,Q103, Q104,R127,R122,R119, R123,R124,R101 (Sheet 1 of 6)
NG Check D103,L103,EC106, EC107,C105,C106 (Sheet 1 of 6) OK Change T101 (Sheet 1 of 6) 5