3. COMB PHASE
• Adjustment Procedure
1. Set the TV/LINE to LINE mode.
2. Supply the multiburst signal to video input jack.
3. Set the VCR to the stop mode.
4. Connect the oscilloscope to check point and trigger the scope with CH1.
5. Adjust R494 until the 3.58 MHz component of multiburst signal becomes minimum.
• Adjustment Inspection Standard: Minimum
6
Mode
Adjustment Parts
Check Point
Test Equipments
Test Tape
Input Signal
LINE INPUT
CH1: TJ313
Signal Gen.
& STOP
%
R494
CH2: TJ494
Oscilloscope
Multiburst
Location of Adjustment Parts
Observation Waveform
H-Axis: 10us/div
V-Axis: 20mv/div
MAIN PCB
T
U
N
E
R
HEAD-AMP
DECK
8
9
6
3
7
4
1
2
10
5
