Table of Contents
Advertisement
During the adjustment, see the Parts Arrangement
Diagram for Adjustments on Page 7-6.
7-1. MECHANICAL ADJUSTMENTS
Refer to the SERVICE MANUAL of VHS MECHANICAL
ADJUSTMENT VI.
7-2. ELECTRICAL ADJUSTMENTS
2-1.
PRE-ADJUSTMENT PREPARATIONS
Necessary items and indications for total adjustment of electric circuit
of this machine will be described in this chapter.
2-1-1.
Instruments to be Used
1) Color TV
2) Oscilloscope 1 or 2 phenomena, band more than 30 MHz, delay
mode, as provided.
3) NTSC pattern generator
4) PAL pattern generator
5) Digital voltmeter
6) Audio level meter
7) Audio noise meter
8) Audio generator
9) Attenuator
10) Alignment tape
Part Code: 8-192-605-36 KRV-51P (PAL)
Part Code: 8-192-605-32 KRV-51N2 (NTSC)
2-1-2.
Connection
Unless otherwise specified, connect and adjust the measuring
instruments as shown in the following diagram.
VIDEO LINE IN
Pattern generator
Video output
(75 Ω)
Fig. 7-2-1
SECTION 7
ADJUSTMENTS
VCR
Monitor TV
VIDEO LINE OUT
2-1-3. Set-up of Adjustment
In this adjustment, PAL or NTSC pattern generator is connected with
LINE input signal terminal. When checking with tuner, connected
AERIAL terminal. Check that the amplitudes of video signal SYNC
signal, of picture portions, and of burst signals are flat at approximately
0.3, 0.7 and 0.3 V, respectively, and that the level ratio of the burst
signal and "red" signal are 0.30: 0.66. Fig. 7-2-2. shows video signals
(color bars) used in adjusting the video section.
PAL
NTSC
Fig. 7-2-2
2-1-4.
Alignment Tapes
[Alignment Tape (KRV-51N2/KRV-51P)]
Mode
Time
1
SP
Seven minutes
2
SP
Three minutes
3
EP
Seven minutes
4
EP
Three minutes
2-1-5.
Specified I/O Level and Impedance
Input/output terminal
Video inputs
LINE IN
1 Vp-p, 75 Ω, unbalanced, sync negative
Audio inputs
LINE IN
47 kW, –7.5 dBs (0 dBs = 0.775 Vrms)
More than 10 kW, –4 dBs
Video outputs
LINE OUT : phono jack
1 Vp-p, 75 Ω, unbalanced, sync negative
Audio outputs
LINE OUT : phono jacks
–7.5 dBs at load impedance 47 kΩ
Output impedance : less than 10 Ω
7-1
SLV-LF1
Audio signal
Video signal
(HiFi/Normal)
Color bar
Monoscope
400 Hz
Color bar
Monoscope
: phono jack
: phono jacks
Advertisement
Table of Contents
