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Adjustment; Before Adjustment; Precaution; Required Test Equipments - JVC HR-S6950EU Service Manual

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3.1

Before adjustment

3.1.1 Precaution

• The adjustments of this unit include the mechanism
compatibility and electrical adjustments. During the
performance of this work, be sure to observe the pre-
cautions for each type of adjustment.
• If there is a reference to a signal input method in the
signal column of the adjustment chart, "Ext. S-input"
means the Y/C separated video signal and "Ext. input"
means the composite video signal input.
• Unless otherwise specified, all measuring points and
adjustment parts are located on the Main board.

3.1.2 Required test equipments

• Color (colour) television or monitor
• Oscilloscope: wide-band, dual-trace, triggered delayed sweep
• Signal generator: RF / IF sweep / marker
• Signal generator: stairstep, color (colour) bar [PAL/SECAM]
• Recording tape
• Digit-key remote controller(provided)

3.1.3 Required adjustment tools

Roller driver
Jig RCU
Back tension cassette gauge
Alignment tape(MHPE)
Alignment tape(MHPE-L)
Roller driver
PTU94002
Alignment tape
(SP, stairstep, PAL)
MHPE
3.1.4 Color (colour) bar signal, color (colour) bar pattern
Color(colour) bar signal [PAL]
White(100%)
White(75%)
0.7 V
1V
0.3 V
V
Horizontal sync
Machanism
compatibility

adjustment

Jig RCU
Back tension cassette gauge
PTU94023B
Alignment tape
(LP, stairstep, PAL)
MHPE-L
Color(colour) bar pattern [PAL]
(75%)
Burst
0.3 V
V
U
U
V(R-Y)
U(B-Y)
Digitized in Heiloo Netherland
SECTION 3
ADJUSTMENT
s Colour bar signal [SECAM]
0.7 Vp-p
0.3 Vp-p
Carrier(4.406 MHz)
3.1.5
When adjusting this unit, set the VCR mode and switches
as described below.
• When using the Jig RCU, it is required to set the VCR
to the Jig RCU mode (the mode in which codes from
the Jig RCU can be received). (See SECTION 1 DIS-
ASSEMBLY.)
Jig RCU
[Data transmitting method]
Depress the "
after the data code is set.
: Used
: Not used
Electrical
adjustment
• Set the switches as shown below unless otherwise
specified on the relevant adjustment chart. The switches
that are not listed below can be set as desired.
If the VCR is not equipped with the functions detailed
below, setup is not required.
PUJ48076-2
AUTO PICTURE/VIDEO CALIBRATION/
B.E.S.T./D.S.P.C.
PICTURE CONTROL/SMART PICTURE
VIDEO STABILIZER
TBC
Alignment tape
(EP, stairstep, NTSC)
Digital 3R
MHP-L
VIDEO NAVIGATION/TAPE MANAGER OFF
BLUE BACK

3.1.6 Manual tracking mode (Auto tracking ON/OFF) setting

(1) In order to set to the manual tracking mode during tape
playback, press the "SP/EP(LP)" button on the remote
control unit.
• Each press of the button switches the auto tracking ON
or OFF.
• When the auto tracking is OFF, the monitor screen dis-
plays "AT: OFF".
• When the manual tracking mode is set, the tracking is
White
Black
placed at the center position.
100%
(2) Press "channel +/-" to adjust the tracking manually.
s Colour bar pattern [SECAM]
R-Y
R-Y
B-Y
B-Y
Cyan
Carrier(4.250 MHz)
Horizontal sync
R-Y colour BAR
B-Y colour BAR

Switch settings

" ( 3 ) button
CUSTOM CODE
43: A
CODE
DATA CODE
Fig. 3-1-4a
Jig RCU [PTU94023B]
3/28/2017
White
R–Y
B–Y
Black
100%
INITIAL MODE
OFF
NORMAL/NATURAL
OFF
ON
ON
OFF
3-1

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