Memorex MVT2138, Руководство по обслуживанию

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ELECTRICAL ADJUSTMENTS
1.
2.
3.
4.
5.
6.
7.
Fig. 3-4
APC OFFSET
VCO FREE RUN
RF AGC DELAY
VIDEO LEVEL
FM LEVEL
V COMP
NEXT
3-1: PG SHIFTER
1.
2.
3.
(If the above adjustments doesn't work well;)
1.
2.
3.
4.
5.
6.5H
CH-2
CH-1
CH-2
6.5H
CH-1
3. ADJUSTMENT PROCEDURE
(VCR SECTION)
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.
Set the volume level to minimum after unplugging the
power cord once from the AC source in order to set the
TV/VCR to the reset mode.
Press the VOL. DOWN on the set and the channel
button (9) on the remote control simultaneously to
display adjustment mode on the screen as shown in
Fig. 3-1, Fig. 3-2, Fig. 3-3 and Fig. 3-4.
NOTE
1.
2.
3.
4.
5.
6.
7.
BRIGHT
CONTRAST
TINT
COLOR
SHARPNESS
NEXT
1.
2.
3.
4.
5.
6.
7.
RED BIAS
GREEN BIAS
BLUE BIAS
RED DRIVE
GREEN DRIVE
BLUE DRIVE
NEXT
1.
2.
3.
4.
5.
6.
7.
8.
H PHASE
V DC
V SIZE
OSD H
CUT OFF
NEXT
8.
8.
Use the 1-8 keys on the remote control to select the
options shown in Fig. 3-1, Fig. 3-2, Fig. 3-3 and Fig. 3-4.
Press the 8 key to end the adjustments.
ADJUST MODE 3
ADJUST MODE 2
ADJUST MODE 1
ADJUST MODE 4
8.
Playback the alignment tape. (JG001)
Set the volume level to minimum after unplugging the
power cord once from the AC source in order to set the
TV/VCR to the reset mode.
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.
Connect CH-1 on the synchro scope to TP4101 and
CH-2 to TP4201.
Playback the alignment tape. (JG001)
Press the VOL. DOWN button on the set and the
channel button (4) on the remote control simultaneously.
Adjust the Tr/- key so that the waveform of the
synchro scope measures 6.5
±
0.5(H) at both leading
and trailing edges. (Refer to Fig. 3-5-A, B)
Press the Tracking Auto key.
Fig. 3-5-A
Fig. 3-5-B
Fig. 3-1
Fig. 3-2
Fig. 3-3
END
END
END
END
D2-1