Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Help w/Emerson VCR Tape Transport
Yeah, I know...POS. Emerson VCR755. Don't want to knock myself out here;
the tuner has dropped 50% of the channels but the VCR worked fine. Now, tape loads,FF,RW,Eject all ok; Play: tape transport arms move 90%, retract, and the VCR shuts off. The belt is OK. I can't see the geared idler with the tape in. Pinch roller/capstan contact, but capstan doesn't run. Don't know if it's supposed to before tape transport completes. The motor runs back and forth during play initiation, and the tape does not de-spool, but ends up tensioned normally. Seems to be a logic error; should I shoot for two at the nearest dumpster? JR -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
#2
|
|||
|
|||
Emerson vcr`s, common problem, MODE SWITCH clean it with q-tip and alcohol..
"JR North" wrote in message ... Yeah, I know...POS. Emerson VCR755. Don't want to knock myself out here; the tuner has dropped 50% of the channels but the VCR worked fine. Now, tape loads,FF,RW,Eject all ok; Play: tape transport arms move 90%, retract, and the VCR shuts off. The belt is OK. I can't see the geared idler with the tape in. Pinch roller/capstan contact, but capstan doesn't run. Don't know if it's supposed to before tape transport completes. The motor runs back and forth during play initiation, and the tape does not de-spool, but ends up tensioned normally. Seems to be a logic error; should I shoot for two at the nearest dumpster? JR -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
#3
|
|||
|
|||
Some of those emersons had a plastic arm by the
capstand shaft that would crack and the pin would slide down or all the way out. Doug |
#4
|
|||
|
|||
I need to remove the tape deck to work on it. How do you remove the
ribbon cables from their teminals? I tried prying the sides out at the slots, but the cables don't come out. I din't want to damage them. Ideas? JR JR North wrote: Yeah, I know...POS. Emerson VCR755. Don't want to knock myself out here; the tuner has dropped 50% of the channels but the VCR worked fine. Now, tape loads,FF,RW,Eject all ok; Play: tape transport arms move 90%, retract, and the VCR shuts off. The belt is OK. I can't see the geared idler with the tape in. Pinch roller/capstan contact, but capstan doesn't run. Don't know if it's supposed to before tape transport completes. The motor runs back and forth during play initiation, and the tape does not de-spool, but ends up tensioned normally. Seems to be a logic error; should I shoot for two at the nearest dumpster? JR -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth -- |
#5
|
|||
|
|||
JR NORTH:
Folow the suggestion from Nolsar regarding the MODE switch. You do NOT need to remove the ribbon connectors or the deck to work on it. The mode switch can easily be serviced without removing the deck from the cabinet case. Almost all other service can be done this way too. electricitym |
#6
|
|||
|
|||
I removed the mode sw, removed the cover and worked some alcohol into
it. No change. I couldn't disassemble it further. The wires to the switch go under the deck, and I can't see where they connect to the board with the deck in place. I made a service cassette, but I still can't get to the mode sw to probe it or adjust it during operation.That's why I need to remove the deck. Also, found 2 small nylon pins in the cabinet when disassembled. About 2mmX15mm, with broken ends. Don't know if they are manufacturing alignment debris or parts of the transport, or if they are related to the fault. Can't see without removing the deck. JR wrote: JR NORTH: Folow the suggestion from Nolsar regarding the MODE switch. You do NOT need to remove the ribbon connectors or the deck to work on it. The mode switch can easily be serviced without removing the deck from the cabinet case. Almost all other service can be done this way too. electricitym -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
#7
|
|||
|
|||
JR North:
Without removing the deck from the cabinet you can easily service the mode switch...... unscrew the bottom board, unsolder the 5 contacts to the mode switch, gently lift up the edge of the board and completely remove the mode switch.... it can then be snapped apart, contacts cleaned and increase the spring tension on the contacts by gently and slightly bending each one. Reinstall and resolder the connections. The good news is that the Emerson mode switch has a small protrusion that fits in a hole on the cam gear so it can not be mis-timed. Again.... you DO NOT have to remove the deck to do this service or just about any other service on the 755.. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "JR North" wrote in message ... I removed the mode sw, removed the cover and worked some alcohol into it. No change. I couldn't disassemble it further. The wires to the switch go under the deck, and I can't see where they connect to the board with the deck in place. I made a service cassette, but I still can't get to the mode sw to probe it or adjust it during operation.That's why I need to remove the deck. Also, found 2 small nylon pins in the cabinet when disassembled. About 2mmX15mm, with broken ends. Don't know if they are manufacturing alignment debris or parts of the transport, or if they are related to the fault. Can't see without removing the deck. JR wrote: JR NORTH: Folow the suggestion from Nolsar regarding the MODE switch. You do NOT need to remove the ribbon connectors or the deck to work on it. The mode switch can easily be serviced without removing the deck from the cabinet case. Almost all other service can be done this way too. electricitym -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
#8
|
|||
|
|||
Well, clearly we aren't talking about the same model. The mode sw is
wired into a small board under the main board. This board also has a micro switch on it on the underside. There is no way to unsolder the (3) mode sw wires from it without removing the deck. Which brings me back to my original q: how to remove the ribbon cables from their terminals? JR sofie wrote: JR North: Without removing the deck from the cabinet you can easily service the mode switch...... unscrew the bottom board, unsolder the 5 contacts to the mode switch, gently lift up the edge of the board and completely remove the mode switch.... it can then be snapped apart, contacts cleaned and increase the spring tension on the contacts by gently and slightly bending each one. Reinstall and resolder the connections. The good news is that the Emerson mode switch has a small protrusion that fits in a hole on the cam gear so it can not be mis-timed. Again.... you DO NOT have to remove the deck to do this service or just about any other service on the 755.. -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
JVC VCR won't load tapes | Electronics Repair | |||
Panasonic NV-F65 thinks it has a tape inserted | Electronics Repair | |||
How to Adjust the Tape Path Alignment on Newer VCRs | Electronics Repair | |||
How to fix tape eating VCR | Electronics Repair | |||
Fisher cassette heads | Electronics Repair |