Read and perform this adjustment when repairing the
circuits or replacing electrical parts or PCB assemblies.
ELECTRICAL ADJUSTMENTS
1. BASIC ADJUSTMENT
CAUTION
When replacing IC's or transistor, use only specified
silicon grease (YG260M).
(To prevent the damage to IC's and transistors.)
1-1: PG SHIFTER
CONDITIONS
MODE-PLAYBACK
Input Signal-Alignment Tape (JG001R)
INSTRUCTIONS
Connect CH-1 on the oscilloscope to TP4002 and CH-2
to pin 19 of J4504.
Playback the alignment tape. (JG001R)
Press and hold the Tracking-Auto button on the remote
control more than 2 seconds to set tracking to center.
Press both CH UP button and STOP button on the set for
more than 2 seconds. If the indicator ATR disappear's,
the adjustment is finished. (Refer to Fig. 1-1-A, B)
1.
2.
3.
4.
6.5H
CH-1
CH-2
Fig. 1-1-A
CH-1
CH-2
6.5H
Fig. 1-1-B
D3-1
1-2: PB-Y LEVEL
CONDITIONS
MODE-PLAYBACK
Input Signal-Alignment Tape (JG001F)
INSTRUCTIONS
Connect the oscilloscope to pin 19 of J4504 through 75
ohm resistor.
Playback the alignment tape. (JG001F)
Check if the VIDEO OUTPUT LEVEL is 1.05 ± 0.15Vp-p.
(Refer to Fig. 1-2)
1.
2.
3.
Fig. 1-3
1.05Vp-p
Fig. 1-2
1.05Vp-p
1-3: E-E LEVEL
CONDITIONS
MODE-STOP
Input Signal-PAL Color Bar
INSTRUCTIONS
Connect the color bar generator to pin 20 of J4504.
Connect the oscilloscope to pin 19 of J4504 through 75
ohm resistor.
Check if the VIDEO OUTPUT LEVEL is 1.05 ± 0.15Vp-p.
(Refer to Fig. 1-3)
1.
2.
3.
1-4: E-E AUDIO LEVEL
CONDITIONS
MODE-STOP
Input Signal-Audio Signal: 1KHz, 500mVrms
Input Select-AV
INSTRUCTIONS
Connect the color bar generator to pins 2 and 6 of J4504.
Connect the AC voltmeter to pins 1 and 3 of J4504
through 47K ohm resistor.
Check if the AUDIO OUTPUT LEVEL is 500(mVrms) ±
2(dB)
1.
2.
3.
