Toshiba Dvr4xsu Owners Manual
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TROUBLESHOOTING GUIDE E-5 D-VR4XSU/D-VR4XSC Check LED of DECK, PHOTO SENSOR. Change LOADING MOTOR. The CASSETTE TAPE CAN NOT BE INSERTED Check WORM GEAR of cassette loading block. YES YES YESNO NO NO Does WORM GEAR of cassette loading block move ? When a CASSETTE can not inserted, is pin 79 of IC3001 5V ? When a CASSETTE is inserted, is pin 8 of CP3001 12.6V ? Check circuit of POWER BLOCK.
TROUBLESHOOTING GUIDE E-6 D-VR4XSU/D-VR4XSC Check IC3001. Does another CASSETTE insert ? Check SW3001. Defective CASSETTE or cassette loading block. YES YES YESNO NONO Does SW3001 and REC LEVER correctly set ? After inserting CASSETTE, is pin 97 of IC3001 0V ?Correctly SW3001 and REC LEVER set. WHEN INSERTING A CASSETTE, IT EJECTS IMMEDIATELY
TROUBLESHOOTING GUIDE E-7 D-VR4XSU/D-VR4XSC Check DECK MECHANISM.CAN NOT FF/REW YESNO At FF/REW, does voltage at pin 64 of IC3001 change ?Check of IC3001.
TROUBLESHOOTING GUIDE E-8 D-VR4XSU/D-VR4XSC Change CYLINDER unit. TAPE LOADING IS OK, BUT UNLOADS IMMEDIATELY Check POWER BLOCK. Change IC3001. Check Q3002 and Q3003. YESYES YES YES YESNONONO NO NO Does CYLINDER rotate ? Is there HEAD SW PULSE at TP3001?Is the voltage at pin 2 of CP3001 12V ? At play, is the voltage at pin 12 of CP3001 2.6V ? Is PG PULSE signal inputted to pin 65 of IC3001 ?
TROUBLESHOOTING GUIDE E-9 D-VR4XSU/D-VR4XSC 5V Change CYLINDER MOTOR. Change IC3001. Change CYLINDER MOTOR.YES YESNONO AT PLAY, THE PICTURE JITTERS VERTICAL MINUTELY Is FG wave of CP3001 at pin 11 5V ? Is pin 12 of CP3001 2.6V ?
TROUBLESHOOTING GUIDE E-10 D-VR4XSU/D-VR4XSC AUTO TRACKING DOES NOT OPERATE 2.5Vp-p YESYESNO NO In auto tracking, is the voltage at pin 89 of IC3001 more than DC 0.2V ?Does the CTL pulse signal (about 2.5Vp-p) appear at pin 7 of IC3001?. Check CONTROL HEAD. Change IC3001.
TROUBLESHOOTING GUIDE E-11 D-VR4XSU/D-VR4XSC YES YESNO NO WHEN PLAYBACK, FF OR REW MODE IS ACTIVE, UNIT STOPS IMMEDIATELY Does CAPSTAN DD MOTOR rotate ?Refer to section CAPSTAN DD MOTOR NOT ROTAING. Is there REEL SENSOR PULSE signal at pin 3 and 4 of IC3001?Check Q3005 and Q3006. Change IC3001.
TROUBLESHOOTING GUIDE E-12 D-VR4XSU/D-VR4XSC YES YES YES YES YESNO NONO NO AT PLAY, PICTURE JITTERS HORIZONTALLY Does a noise on the picture appear ? By adjusting the MANUAL TRACKING UP/DOWN BUTTONS, will the line disappear ?Check P/B ENVELOPE. Is a height of GUIDE POST maximum ?The height of GUIDE POST readjust. Is PG SHIFTER adjustment 6.5H ?Adjust PG SHIFTER. Is a wave of PB-Y unusual ?Change IC101 and peripheral circuit. Change IC101. NO
TROUBLESHOOTING GUIDE E-13 D-VR4XSU/D-VR4XSC YESYES YES YESNO NO NO NO AT PLAYBACK, THE PICTUER DOES NOT APPEAR Does E-E picture appear ?Refer to AT E-E, NO PICTURE Is there video signal at pin 26 of IC101?Change IC101. Change IC3001. Is there video signal at pin 49 of IC3001? Is there video signal at pin 47 of IC3001? Check at pin 5 of J8005 and peripheral circuit.Change IC3001. YESNO Is there video signal at pin 30 of IC8301?Change IC8301.
TROUBLESHOOTING GUIDE E-14 D-VR4XSU/D-VR4XSC AT E-E, NO PICTURE OF VCR MODE YES YESNO NO Is there video signal at pin 26 of IC101?Change IC101. Change IC3001. Is there video signal at pin 49 of IC3001? YESNO Is there video signal at pin 32 of IC101?Check IC8301, J603, J8002 , TU301and peripheral circuit. Check J8001. YESNO Is there video signal of at pin 30 IC8301?Change IC8301. Check at pin 5 of J8005 and peripheral circuit.