How do I change the RF output frequency on a Philips VR 620/75 VCR. It was supplied with a LP20703 universal remote. Peter

RF out means Radio Frequency output. That will send out video and usually audio to a compatible device like a TV. For example connecting a VCR or older games console was done with the RF out on the VCR or console sending the picture and sound to the TV.
S/PDIF is a Sony /Philips Digital Interface Format.
It is a means of sending sound from one device to another. For example from a Blu-Ray player to a surround sound system. This is usually done with a Toslink lead that uses light to send the information but apparently it can use RCA leads, I've never seen that.

Depending on the age of the VCR it will have either a small screw on the back near the aerial socket, or the adjustment will be on a onscreen menu somewhere. It will be called the "RF OUTPUT".
They way to do them is for the screw type - turn it slightly - then with a video playing (something that you can tell what to look for) retune your TV. You might need to do this several times to get clear of stations.
With the menu type you just need to enter a RF number. This is often the best type as most VCR's give you the full RF range. Whereas the screw will only be a short range. Enter a RF frequency number which will be well away from broadcast stations. You can find which TV stations broadcast on the frequences in your area by looking it up in Google. Once entered, play a video and retune the TV to it.
Some VCR's allow the output to be switched off. You can use this option if you have the VCR connected via a scart lead. As you don't need to have the TV tuned in to the VCR.

hELLO THERE
hERE IS SOME MODIFICATIONS FOR THIS RADIO
Galaxy Mods DX 2527 - VR 1....AM/FM S-Meter, VR 2....SSB S-Meter, VR 3....SSB Squelch Range, VR 4....AM/FM Squelch Range, VR 7....SSB Carrier Balance, VR 8....RF Meter, VR11...Driver Bias, VR12...SSB ALC, VR13...Hi Power, VR14...AMC, VR15...AM Low Power, VR16...SSB Low Power, VC 1....10.240, VC 2....10.240. DX 2517- VR 1....AM/FM S-Meter, VR 2....SSB S-Meter, VR 3....SSB Squelch Range, VR 4....AM/FM Squelch Range, VR 5....FM Deviation, VR 6....SSB Carrier Balance, VR 7....TX Offset, VR 8....CW Beep Level, VR 9....RF Meter, VR10...Final Bias, VR11...Final Bias, VR12...Driver Bias, VR13...SSB ALC, VR14...AM/FM High Power, VR15...AM Modulation Meter, VR16...AM Modulation, VR17...SSB Power, VR18...AM/FM Low Power, VR601..13.8 Volt Power Supply. DX 22B- VR 1....AM/FM S-Meter, VR 2....SSB S-Meter, VR 3....SSB Squelch Range, VR 4....AM/FM Squelch Range, VR 7....SSB Carrier Balance, VR 8....RF Meter, VR11...Driver Bias, VR12...SSB ALC, VR13...High Power, VR14...AMC, VR15...AM Low Power, VR16...SSB Low Power, VR21...TX Offset, VC 1....10.240, VC 2....10.240. DX 11B- VR 1....AM/FM S-Meter, VR 2....SSB/CW S-Meter, VR 3....SSB Squelch Range, VR 4....AM/FM Squelch Range, VR 5.....FM Deviation, VR 7....SSB Carrier Balance, VR 8....RF Meter, VR10...Final Bias, VR11...Driver Bias, VR12...SSB ALC, VR13...AM/FM High Power, VR14...AM Modulation, VR16...CW Tone Level, VR20...Final Bias, VR21...TX Offset, VR601..13.8 Volt Power Supply, VR803..AM/FM Low Power. DX 77HML, DX 88HL, and DX 99V- VR 1....AM/FM S-Meter, VR 2....SSB S-Meter, VR 3....SSB Squelch Range, VR 4....AM/FM Squelch Range, VR 5.....FM Deviation, VR 7....SSB Carrier Balance, VR 8....RF Meter, VR10...Final Bias, VR11...Driver Bias, VR12...SSB ALC, VR13...AM/FM High Power, VR14...AM Modulation, VR16...AM/FM Low Power, VR20...Final Bias, VR21...TX Offset.
Unmarked VR in R189..AM/FM Medium Power for DX 77HML only. DX 33HML, DX 44V, DX 55V, DX 66V, and DX 73V- VR 1....AM/FM S-Meter, VR 4....AM/FM Squelch Range, VR 5.....FM Deviation, VR 8....RF Meter, VR12...Low Power AM Modulation, VR13...AM/FM High Power, VR14...High Power AM Modulation, VR16...AM/FM Low Power.
Unmarked VR in R188..AM/FM Medium Power (DX 33HML only)
Unmarked VR in C139..Med Power AM modulation (DX 33HML only) DX 949,DX 959- VR 1....AM S-Meter, VR 2....SSB S-Meter, VR 3....SSB Squelch Range, VR 4....AM Squelch Range, VR 6.....SSB Carrier Balance, VR 7....TX Offset, VR 9....RF Meter, VR10...Final Bias, VR12...Driver Bias, VR13...SSB ALC, VR14...AM High Power, VR15...AM Modulation Meter, VR16...AM Modulation, VR17...SSB Power, VR18...AM Low Power, VC1....10.240. DX 2517 and DX 2527-
Symptom:Buzzing or motorboating sound in either the transmit or receive.
Problem: TR602 is oscillating
Cure: Replace C602 with a .01uF cap {Cap is located in the power supply board}.
RG 66,99,DX2517 Replace Q54 2SB754 60watt 7A with a higher power 2SB817 100 Watt 12A. Derating of this component will cool operation, provide better voltage stability,decrease wobble, allow voltage increase to 14.5 volts comfortably. (replace 10 volt caps in this section of the radio to a minimum of 16 volts before increasing supply voltage to this level)and provide faster swing rise time, Replace Q37 2SA473 to a 2SA1012-0 or ECG153 this will improve the clarity and volume of the modulation and it will also run a lot cooler.

yes. the paperwork that came with the remote will tell you how to change the frequency of the remote so it works for your vcr. make sure the remote is compatable with the vcr brand

ok. This is a really easy one.
All you have to do is hold down the menu button on the remote control for more than 5 seconds, If that doesnt work hold down the power button on the remote control for more than 5 seconds. If that doesnt work hold down the power button on the actual vcr unit for 15 seconds. The first method should work for Panasonic's fine.
This will then display your current rf output.
You can then change the output by using the up and down arrows or the channel up and down button on your remote or the vcr unit.
Press menu button to save or the same button you used to bring up the rf opposition eg power button on remote or the unit.

all the best. Top tech

This sounds like a hookup or programming problem.

The typical hookup is cable/satellite box output to VCR antenna/RF input, then VCR antenna/RF output to television input. Since you are able to watch pre-recorded tapes, the latter is already correct. There are other ways to connect, using the audio/video outputs of VCR to audio/video inputs of the TV. Older or low end TV sets may not have these connections.

If by chance you are using an outdoor antenna (not cable or satellite) then the antenna connects to VCR antenna/RF input and VCR output as above. You will also need to program the VCR into the stations- most late VCRs will scan for active channels, and program themselves to those channels.

I'm not sure of the capabilities of newer cable & sat boxes, but generally, you had to tune that box to the channel you wanted to record. The VCR is set to channel 3 or 4 depending on the output of the cable box.

Lastly, most VCRs of the last 10+ years require the remote to setup advanced functions, such as timed record, date & channel setup functions. The buttons on the VCR itself only do very basic functions, Stop/Play/Rewind/F-forward/Eject etc.

If you don't have the orig. remote, some universal remotes may be able to do advanced programming functions.

Harmony® One Advanced Universal Remote. From:
http://www.logitech.com/index.cfm/remotes/universal_remotes/devices/3898&cl=GB,EN?WT.mc_id=ps_google_harmony-one-spot_0108_emea&strf=Paid_Search&WT.srch=1&gclid=CLTus9y355ECFRSyEAodh1yAWw

Philips Pronto TSU9400 From:
http://www.remotequest.com/pronto_tsu9400.htm

Press the channel selection switches at the same time until RF03 or RF04 display. Select the correct channel by pressing the UP ch. button.

You can watch the TV programs
with the tuner of the unit. (Usually
channel 3 or 4 of the TV is
available for the RF converter
setting.) Be sure to connect the
unit to a TV using the RF cable.
1
Select channel 3 on your TV.
2
Press [VIDEO/TV] on the remote
control.
• If noise appears, change the
RF output channel of the unit to
CH 4 by pressing [VIDEO/TV]
for 3 seconds. The RF output
channel will alternate between
CH3 and CH4

(FROM MANUAL)
RF Output Channel
1-Set TV to Channel 4
2-Insert a prerecoeded tape into the unit
3-Press Source until VCR light is lit
~ if noise is seen on TV screen, press (VCR/TV) on remote
4-Press play> once
5- After a few seconds, press and hold {Play>} on the unit for 3 seconds
~ The RF output channel will change to channel 4 from 3 and you will see a playback picture
~ When a picture does not appear on the TV screen, repeat step 4
6- Press (STOP) to stop plasyback