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3.1 PRECAUTION
The following adjustment procedures are not only necessary
after replacement of consumable mechanical parts or board
assemblies, but are also provided as references to be re-
ferred to when servicing the electrical circuitry.
In case of trouble with the electrical circuitry, always begin a
service by identifying the defective points by using the meas-
uring instruments as described in the following electrical ad-
justment procedures. After this, proceed to the repair, replace-
ment and/or adjustment. If the required measuring instruments
are not available in the field, do not change the adjustment
parts (variable resistor, etc.) carelessly.
3.1.1 Required test equipments
• Color (colour) television or monitor
• Oscilloscope:
wide-band, dual-trace, triggered delayed
sweep
• Frequency counter
• Signal generator: RF / IF sweep / marker
• Signal generator: stairstep, color (colour) bar [PAL]
• Recording tape
• Digit-key remote controller(provided)
3.1.2 Required adjustment tools
Jig RCU
Alignment tape
PTU94023B
(SP, stairstep, PAL)
MHPE
Alignment tape
(SP stairstep, NTSC)
PTU93006
MHP
3.1.3 Color (colour) bar signal,Color (colour) bar pattern
s Colour bar signal [PAL]
White(100%)
White(75%)
Burst
0.7 V
1V
0.3 V
0.3 V
V
U
V(R-Y)
Horizontal sync
U(B-Y)
3.1.4 Switch settings and standard precautions
The SW settings of the VCR and the standard precautions
for the electrical adjustments are as follows.
• When using the Jig RCU, set its custom code to match
the custom code of the VCR.
SECTION 3
ELECTRICAL ADJUSTMENT (VHS)
Alignment tape
(LP, stairstep, PAL)
MHPE-L
LPF
Alignment tape
(S-VHS, SP/LP, color (colour) bar)
MH-2H
s Colour bar pattern [PAL]
(75%)
White
V
U
Black
100%
Jig RCU
[Data transmitting method]
Depress the "
" ( 3 ) button
after the data code is set.
CUSTOM CODE
43: A
CODE
53: B
CODE
DATA CODE
Fig. 3-1-4a
Jig RCU [PTU94023B]
• 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 de-
sired.
If the VCR is not equipped with the functions detailed
below, setup is not required.
AUTO PICTURE/VIDEO CALIBRATION/
B.E.S.T./D.S.P.C.
PICTURE CONTROL/SMART PICTURE
VIDEO STABILIZER
TBC
Digital 3R
VIDEO NAVIGATION/TAPE MANAGER OFF
• Unless otherwise specified, all measuring points and
adjustment parts are located on the Main board.
• 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.
3.1.5 EVR Adjustment
Some of the electrical adjustments require the adjustment
performed by the EVR system. The Main board assembly
have EEPROMs for storing the EVR adjustment data and
user setups.
Notes:
• In the EVR adjustment mode, the value is varied with
the channel buttons (+, –). The adjusted data is stored
when the setting mode changes (from PB to STOP,
when the tape speed is changed, etc.). Take care to
identify the current mode of each adjustment item
when making an adjustment.
• When changing the address setting in the EVR adjust-
ment mode, use the Jig RCU or the remote controller
having numeric keypad with which a numeric code can
be directly input.
The remote control code of the Jig RCU corresponds
to each of the digit keys on the remote controller as
follows.
Digit-key 0
1
2
3
Code
20 21
22 23 24
• As the counter indication and remaining tape indica-
tion are not displayed FDP during the EVR adjustment
mode, check them on the TV monitor screen.
• When performing the EVR adjustment, confirm that the
FDP indication is changed to the EVR mode, as shown
below.
INITIAL MODE
OFF
NORMAL/NATURAL
OFF
ON
ON
4
5
6
7
8
9
25
26
27 28 29
3-1
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