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2-4. IF CIRCUIT ADJUSTMENT
In this model,
the circuits
of the TUNER,
IF, and RF
Note:
The 3 in tuner dose not need any adjustments, because
converter have been made into one. Therefore, should one
precise adjustments
were down before shipment.
circuit malfunction,
the whole unit must be replaced.
The adjustments
for the IF (RF AGC) circuit of the 3 in 1
tuner are described below.
2-4-1.
TEST EQUIPMENT
AND STANDARD
REQUIRED
Monitor TV
2-4-2. LOCATION
OF ADJUSTMENT
POINT
P36200EI
Rear Panel u
h
Y
3 in 1 Tuner
c
>
0
>
c.
>
CP-1
PWB
Assembly
—
c
>
<.
>
<
>
VR -
c.
>
9
c
>
" e
'
7
3 in 1 Tuner
Fig. 2-4-1
2-4-3. RF AGC ADJ.
Measuring Point Measuring Equipment Adj. Condition
Pictureof
MonitorTV
E-E mode
monitor
TV
Adj. Location
Adj. Value
VR (RF AGC)
SIN is best point
(on the 3 in 1 tuner)
1.
2.
3.
4.
Connect the monitor TV to the VHFAJHF antenna output
terminal.
Connect the VHF or UHF antenna to the VHFIUHF antenna
input terminal.
Receive the middle electrical field (70 dBp -90 dB~) of the
VHF or UHF channel, and slowly turn the VR (RF AGC)
from the point where snow-noise
is present to the point
where it just disappears from the monitor TV.
Confirm by monitor TV that there is no beat and saturation
(S/N is best point) when receiving any TV channel.
2-5. CHECKING THE RF CHANNEL
If the TV and VCR are connected by an aerial output cable which has poor shielding characteristics,
turn off the RF converter of
the VCR and use the VCR with an AV cable. To turn the RF converter off, input "00" when setting the RF (when "RF" is
displayed) during VCR pre-setting
3. TEST POINTS FOR TAPE PATH ADJUSTMENT
Test points TP182 (ENV) and TPI 83 (SW-P) for tape path adjustment
are shown in figure below.
For adjustment, refer to the separate volume "V95 I Mechanism Manual" (MM531 433) and "V95 I I Mechanism Manual" (MS531 500).
P66300D
TP163
TP182
(SW-P)
(ENV.)
~/
-m
m
D
F
—
VP-1 PWB Assembly
Fig. 3-1
–13–
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