Hitachi DV-W1U No Sound Are There Signals, Breakdown CRD-RA1, Check IC1512 and IC1513

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3-3. RECORDER AUDIO CIRCUIT

NO SOUND

ARE THERE SIGNALS		No
AT PG1304 pins 1, 3?
Yes


ARE IC1512 pins 6, 12		No
AND IC1513 pins 6, 12

0V?
Yes


ARE THERE SIGNALS		No
AT IC1507 pins 5, 10

AND IC1508 pins
5, 10?
Yes

ARE THERE SIGNALS	No
AT IC1507 pins 7, 8
AT IC1507 pins 7, 8
AND IC1508 pins 7, 8?
Yes
Yes

CHECK C3515, C3516, C1503, C1504,

R3517, R3518, R1579, R1580

BREAKDOWN CRD-RA1

CHECK Q3510, Q3511 AND Q3512

CHECK IC1512 AND IC1513

CHECK IC1507, IC1508, D3301, D1302, Q3543, Q3544, Q1310, Q1311, Q3505, Q3506, Q1312, Q1313, ZD3501, ZD1303

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Contents DV-W1U Safety Precautions Hitachi Sales CorporationValue units used in parts list Contents Chapter General Information DVD/VCD/CD-DA CVD/SVCD/DVCD CD-R/CD-RW UL/CSA/FCCCD-R/RWCRD-RA1WO2 NtscAccessories Troubleshooting Audio Circuit Breakdown CRD-RA1 No Sound Are There SignalsCheck IC1512 and IC1513 Track no REC StandbyPlayer Drive Recorder DriveChapter S a S S E M B L Y Disassembly Procedure Diagrams JAK board and REG board DVD-ROM and DEC board P L O D E D E W Mechanical Parts List Electrical Parts List Symbol DescriptionElectrolytic 10UF Description Symbol Chip Resistor 56KOHM+-5% 0.1W Transformer CD-R DeckDEC DVD-ROMLCD Display Flhp Schematic Diagram LCD Display FlhpCDR Switch SW-CDR Schematic Diagram Rear Jack JAK Schematic Diagram PG2201Regulator REG Schematic Diagram Regulator REGDECK-1 DEC Schematic Diagram DECK-1 DECDECK-2 DEC Mpeg DecoderDEC Circuit Board Identification of Parts Location SW-DVD Circuit Board SW-CDR Circuit BoardJAK Circuit Board Identification of Parts Location JAKIF, REG Circuit Boards Identification of Parts LocationFlhp Circuit Board FlhpBlock Diagram DV-W1U