ELECTRICAL ADJUSTMENTS
1. ADJUSTMENT PROCEDURE
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
When replacing IC's or transistors, use only specified
silicon grease (YG6260M).
(To prevent the damage to IC's and transistors.)
On-Screen Display Adjustment
1.
2.
Unplug the AC plug for more than 30 minutes to set the
clock to the non-setting state. Then, set the volume level
to minimum.
Press the VOL. DOWN button on the set and the channel
button (9) on the remote control simultaneously to display
adjustment mode on the screen as shown in Fig. 1-1.
CH-1
CH-2
6.5H
Fig. 2-1-A
Fig. 2-1-B
CH-2
CH-1
6.5H
2-2: RF AGC DELAY
1.
2.
3.
4.
5.
Receive the monoscope pattern.
Connect the digital voltmeter between the pin 5 of
CP603 and the pin 1 (GND) of CP603.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (5) on the remote control.
The Fig. 2-2 appears on the display.
Press the channel button (1) on the remote control to
select "RF AGC DELAY".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.50
±
0.05V (80dB).
Use the channel buttons (1-8) on the remote control to
select the options shown in Fig. 1-1.
Press the channel button (0) on the remote control to
end the adjustments.
NOTE
1. H/V
2. AKB
3. COLOR TEMP
4. PICTURE
5. OTHERS
6. TEST PATTERN
7. STEREO/SAP
8. (VOL TEST) 0. END
Fig. 1-1
2. BASIC ADJUSTMENTS
(VCR SECTION)
2-1: PG SHIFTER
1.
2.
3.
4.
Connect CH-1 on the oscilloscope to TP4001 and CH-2
to TP4501.
Playback the alignment tape. (JG001C)
Press and hold the Tracking-Auto button on the remote
control more than 2 seconds to set tracking to center.
Press the VOL. DOWN button on the set and the
channel button (3) on the remote control simultaneously
until the indicator REC disappears. If the indicator REC
disappears, adjustment is completed.
(If the above adjustments doesn't work well:)
5.
6.
7.
Press the VOL. DOWN button on the set and the
channel button (3) on the remote control simultaneously
until the indicator REC disappears.
When the REC indicator is blinking, press both VOL.
DOWN button on the set and the channel button (4) on
the remote control simultaneously and adjust the
Tr/- button until the arising to the down of Head
Switching Pulse becomes 6.5
±
0.5H.
(Refer to Fig. 2-1-A, B)
Press the Tracking Auto button.
1. RF AGC DELAY
2. VIDEO LEVEL
3. FM LEVEL
4. OSD H
5. CUT OFF
6.
7.
8. 0. RETURN
Fig. 2-2
2-3: VCO FREERUN
1.
2.
3.
Connect the oscillator to pin 11 of TU601.
Connect the digital voltmeter to pin 47 of IC601.
Adjust the L608 until the digital voltmeter is 3.6
±
0.05V.
(TV SECTION)
2-4: CONSTANT VOLTAGE (AC)
1.
2.
3.
4.
Using the remote control, set the brightness and
contrast to normal position.
Connect the digital voltmeter to TP401.
Set condition is AV MODE without signal.
Adjust the VR502 until the DC voltage is DC 130
±
0.5V.
2-5: CONSTANT VOLTAGE (DC)
1.
2.
3.
4.
Using the remote control, set the brightness and
contrast to normal position.
Connect the digital voltmeter to TP401.
Set condition is AV MODE without signal.
Adjust the VR501 until the DC voltage is DC 130
±
0.5V.
D2-1
