DOWNLOAD Sharp LC-30HV2E (serv.man2) Service Manual ↓ Size: 2.47 MB | Pages: 50 in PDF or view online for FREE

Model
LC-30HV2E (serv.man2)
Pages
50
Size
2.47 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Major IC functions, Trouble shooting, Printed wiring board block diagram, LCD display chassis layout, Block diagrams for AVC, LCD display.
File
lc-30hv2e-sm2.pdf
Date
PREV: Sharp LC-30HV2E Service Manual

Sharp LC-30HV2E (serv.man2) Service Manual ▷ View online

62
LC-30HV2E
TROUBLE SHOOTING TABLE
 (Continued)
1
No Picture
No 800-MHz signal input at pins (186), (187), (191), (192), (196) and (197) of IC2201.
Check system cable and connector.
No signal output from pins (95), (96) and (97) of IC2201.
Check IC2201 and peripheral circuits.
Disconnect system cable and operate LCD independently.  (Blue screen appears.)
Check system cable, connector and peripheral circuits.
Is each pin normal at IC4701?
Faulty: Check IC4701 and peripheral circuits.
Is each pin normal at IC4901?
Faulty: Check IC4901 and peripheral circuits.
Is each pin normal at IC4551?
Faulty: Check IC4551 and peripheral circuits.
Check SC4501, -4502, -4503 and -4504 and their cables.
2
No Sound
Check outputs of main unit and headphone.
Is signal waveform normal at Q2105 and Q2106?
Faulty: Check Q2105 and Q2106 and peripheral circuits.
Is signal waveform normal at IC3802 and IC3804?
Faulty: Check IC3802 and IC3804 and peripheral circuits.
Is signal waveform normal at IC3805, IC3806 and IC3807?
Faulty: Check IC3805, IC3806 and IC3807 and peripheral circuits.
Check IC3809 and IC3810 and peripheral circuits.
Check IC3810 and peripheral circuits.
Check IC3810, peripheral circuits, connector, cable and speaker.
No output from both
No headphone output
No main unit output
63
LC-30HV2E
6
5
4
3
2
1
A
B 
C
D
E
F
G
H
PRINTED WIRING BOARD BLOCK DIAGRAM-1/2
»
PC I/F Unit
»
AV Unit
U/V TUNER
IC1601
TELTEXT
IC1602
FLASH MEMORY
IC1603
SRAM
IC2501
MULTI  SOUND
P2502
CONNECTOR
IC1301
AV SWITCH
P1301
CONNECTOR
SC1401
CONNECTOR
SC1402
CONNECTOR
P2503
CONNECTOR
P2501
CONNECTOR
IC1401
AV SWITCH
SC1101
SCART-1 TERMINAL
SC1102
SCART-2/3 TERMINAL
J1101
COMP IN/MONI-OUT TERMINAL
IC1102
CONTROL
J1102
MONITOR S-OUT
TELTEXT & AV LINK
CIRCUIT
COMP. AV SWITCH
CIRCUIT
ANALOG AV SWITCH
CIRCUIT
CN1
CONNECTOR
CN7
CONNECTOR
CN6
CONNECTOR
IC25
CIVIC
IC1
CPU
IC310
A/D CONV
IC4
VIDEO MAIN/PC
 A/D CONV
IC413
PANEL LINK
IC319
SDRAM
IC320
SDRAM
CN9
CONNECTOR
CN8
CONNECTOR
IC7
REG.
IC8
REG.
CN5
RS-232C
CN3
DISPLAY OUT-1
IC405
RS-323 RECIVER
PANEL LINK
OUTPUT
CIRCUIT
RS-232C LINE
DRIVER I/F
CIRCUIT
VIDEO IN A/D
CONVERTER
CIRCUIT
POWER REG.
CIRCUIT
PC R,G,B  INPUT
CIRCUIT
CPU CIRCUIT
VIDEO PROCESSOR
CIRCUIT
CPCI-0056CE
■
64
LC-30HV2E
6
5
4
3
2
1
A
B 
C
D
E
F
G
H
PRINTED WIRING BOARD BLOCK DIAGRAM-2/2
»
MAIN Unit
DC/DC CONVERTER
CIRCUIT
P1703
CONNECTOR
IC1502
DAC
IC801
MAIN VIDEO
CHROMA
IC604
SYNC SEP.
IC803
RGB DECODER
P1502
CONNECTOR
P901
ADJUSTING
CONNECTOR
P1702
CONNECTOR
SC1502
CONNECTOR
SC1501
CONNECTOR
IC403
CONTROL
IC406
CONTROL
IC802
SUB VIDEO
CHROMA
SC1503
CONNECTOR
IC402
SUB COMB FIL.
CHROMA
IC405
MAIN COMB FIL.
CHROMA
IC901
PLD
CHROMA
SC1504
CONNECTOR
POWER SUPPLY
65
6
5
4
3
2
1
A
B 
C
D
E
F
G
H
LC-30HV2E
LCD DISPLAY CHASSIS LAYOUT -1/3
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