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This service manual of the old video cassette recorder VT-LC50EM is very good readable even the tiniest numbers (i.e. IC-pins). The circuits are very clear. Many details of the schematic are very good described but in GERMAN language. Many schematic details - but complete at all. Common background information of several details are enclosed and physical knowledge of the TFT liquid crystal display for example. The manual lacks PCB drawings. If you understand german I would recommend this manual for you.
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Hi, this is a very clear manual, nice copy, not quite up to the standard of the very best available but better than many others. I think the price was especially fair for a hard to find manual and I would certainly use this manual seller again. Recommended.
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This schema available for me in good condition. I would highly recommend.
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Thanks for this "hard to find" service manual.
I apreciate the good quality of scanning and the pages scanned in A3 format.
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Helpd me mont a new carradio when prewius mont was a mess.
CD-4900M/DPF-J9030
CIRCUIT DESCRIPTION
2. Test mode
INPUT KEY Insert the AC plug to the wall outlet with pressing the SKIPDOWN key. Insert the AC plug to the wall outlet with pressing the REPEAT key PLAY/PAUSE STOP UP DOWN RANDOM PROCEDURE INITIAL CONDITION � Disc No.1 moves to the center. � Clear the memory of the SRAM. � Door opens. � Set the switch of TIMER ON PLAY to ON. CIRCUIT ADJUSTMENT � Open the door and load the disc to the Disc No.1. � Close the door. The unit changes to test mode05 after clamping the disc. Change the mode 05(tracking-on) and 03(tracking-off) alternately by the PLAY key. Stop the function. The pickup travels outwards. The pickup travels inwards. Shows the result of self-adjustment. 07 EF/FB à ñ ó ñ 08 TG/FG ñ ñ ó ñ 09 FE/RF ñ ñ ó ñ 10 TE/VC ì ñ REPEAT CONFIRM (TIMER PLAY SW) OPERATION A/B Insert the AC plug to the wall outlet with pressing the UP key. Insert the AC plug to the wall outlet with pressing the RANDOM key. PLAY/PAUSE STOP Mode changes alternately by the RANDOM key. Playback PGM signal of the Track No.7,13,23,30,34 and 41 in the order. And release the test mode. Release the test mode. Check the switch position. Change the mechanism A and B. CHECK THE MECHANISM JAMMING. Clamp the Disc No1,2,100,50,200 and 199 in the order. THE MECHANISM TEST MODE. Display shows Niagara until pressing any keys. DISPLAY MECHA. INITIAL INITIAL OK!! INITIAL NG TIMER NG TEST ON
05 XX:XX
03 XX:XX
00 MOTOR FORWARD MOTOR REVERSE 07 XXX:XXX 08 XXX:XXX 09 XXX:XXX 10 XXX:XXX NG: blinking
TIMER ON , TIMER OFF
Change the mode 05(tracking-on) and 03(tracking-off) alternately by the PLAY key. Stop the function. Shows the result of self-adjustment. 07 EF/FB à ñ ó ñ 08 TG/FG ñ ñ ó ñ 09 FE/RF ñ ñ ó ñ 10 TE/VC ì ñ Mode changes alternately by the STOP key. Arm Motor Load operation. Arm Motor Unload operation. Rotary Motor Clockwise turning. Rotary Motor Counterclockwise turning. Playback PGM signal of the Track No.7,13,23,30,34 and 41 in the order.And release the test mode. Release the test mode. Change the mechanism A and B.
05 XX:XX
03X:XX
07 XXX:XXX 08 XXX:XXX 09 XXX:XXX 10 XXX:XXX NG: blinking MOTOR LOAD MOTOR UNLOAD MOTOR CW MOTOR CCW
UP DOWN RANDOM DISPLAY REPEAT CONFIRM OPERATION A/B
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