Samsung SV-643B Technical Specifications, Problems and Solutions, Standard I-NICAM Stereo, Tuner

Technical Specifications

Design and specifications are subject to change without notice.

Format	VHS PAL standard
Heads	Video: 4 rotary heads
	Hi-Fi audio: 2 rotary heads
	Audio/Control: 1 stationary head
	Erase: 1 full track erase head
Television system	STANDARD I-NICAM STEREO
Luminance	FM azimuth recording
Colour system	PAL: Down converted subcarrier phase shifted direct recording
	NTSC PB on PAL TV
Tape speed	SP	23.39 mm/sec
	LP	11.69 mm/sec
Recording/playback time	SP	3 hours (E-180 Tape)
	LP	6 hours (E-180 Tape)
REW time	About 60 sec in REW with E-180
VIDEO
Input	0.5 to 2.0 Vp-p; 75 ohm unbalanced
Output	1.0 ± 0.2 Vp-p; 75 ohm unbalanced
Signal-to-noise ratio	Better than 43 dB (SP)
Horizontal resolution	More than 240 lines
AUDIO
Input	-8 dBm, 47 Kohm unbalanced
Output	-8 ± 3 dBm, 1 Kohm unbalanced
Wow and flutter (WTD)	0.4% max (SP)
Signal-to-noise ratio	68 dB min (IHF A filter)
Frequency response	20Hz - 20kHz

Problems and Solutions

GB

Before contacting the Samsung after-sales service, perform the following simple checks.

Problem	Explanation/Solution
No power	◆ Check that the power plug is connected to a wall outlet.
	◆ Have you pressed the STANDBY/ON button?
You cannot insert a video cassette	◆ A video cassette can only be inserted with the window
	side up and the safety tab facing you.
The television programme was not recorded	◆ Check the VCR aerial connections.
	◆ Is the VCR tuner properly set?
	◆ Check if the safety tab is intact on the cassette.
Timer recording was unsuccessful	◆ Was the STANDBY/ON button pressed to activate the timer?
	◆ Re-check the recording start/stop time settings.
	◆ If there was a power failure or interruption during timer
	recording, the recording will have been cancelled.
No playback picture or the picture	◆ Check to see if you are using a prerecorded tape.
is distorted
You cannot see normal broadcasts	◆ Check the TUNER/EXTERNAL setting. It should be on
	TUNER.
	◆ Check the TV/VCR aerial connections.
Noise bars or streaks on playback	◆ Press the TRK ( or	) buttons to minimize this effect.
When the ❿II button is pressed	◆ A still picture may have “noise bars”, depending on the
during playback, the still picture	condition of the tape. Press the TRK (		or	) buttons during
has severe “noise bars” streaks	SLOW motion to minimize this effect.
Video Head Cleaning	◆ If poor pictures appear on a variety of cassettes, the video
	heads may need cleaning. This is not a common problem
	and unless it appears, the heads should not be cleaned.
	When cleaning the video heads, read all instructions
	provided with the head cleaning cassette. Incorrect head
	cleaning can permanently damage the video heads.

Power requirement	230V (AC 50-60 Hz)
Power consumption	Approx. 17 watts
Operation temperature	41°F-104°F (5°C-40°C)
Operation humidity	10%-75%
Weight	2.8 Kg (net)
Dimensions (WxHxD)	360 x 94 x 240 mm

If when tuning in your TV to the VCR test pattern your TV does not find the test pattern or the pattern when found suffers from interference, it may be due to the VCR output channel clashing with the normal TV transmissions in your area. To prevent this you will need to change the VCR output channel in the following way

1.Remove the aerial input plug from the socket marked (aerial symbol) on the rear of the VCR.

2.Carry out the instructions “Tuning Your Television for the VCR” (see page 14).

3.Carry out the instructions “Setting the VCR output Channel” (see page 16), move the channel number several channels down from the original setting. (example: from 60 to 57).

4.Replace the aerial plug into the socket marked (aerial symbol) on the rear of the VCR.

5.Re-tune your TV to the VCR again by following instructions “Tuning Your Television for the VCR” (page 14).

6.If the problem still exists repeat steps 1 to 5 moving several more channels away from the original setting.

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If you are unable to solve the problem after reading the above instructions, note:

◆The model and serial number on the rear of your VCR

◆The warranty information

◆A clear description of the problem

Then contact your nearest SAMSUNG after-sales service.

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