Read Sony SLV-L45AR / SLV-L65HFAR / SLV-L75HFAR Service Manual online
6-10
2-4. IF CIRCUIT ADJUSTMENT
• In this model, the circuits of the TUNER, IF, and RF
converter have been made into one. Therefore, should
one circuit malfunction, the whole unit must be replaced.
one 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.
Note:
The 3 in tuner dose not need any adjustments,
because precise adjustments were down before
shipment.
because precise adjustments were down before
shipment.
3 in 1 Tuner
Rear Panel
3 in 1 Tuner
CP-1 PWB
Assembly
Assembly
Fig. 2-4-1
VR RF AGC
2-4-3. RF AGC ADJ.
1. Connect the monitor TV to the VHF/UHF antenna
output terminal.
2. Connect the VHF or UHF antenna to the VHF/UHF
antenna input terminal.
3. Receive the middle electrical field (70 dB
µ
~90 dB
µ
) 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.
AGC) from the point where snow-noise is present to the
point where it just disappears from the monitor TV.
4. Confirm by monitor TV that there is no beat and
saturation (S/N is best point) when receiving any TV
channel.
channel.
Measuring Point
Measuring Equipment
Adj. Condition
Picture of
Monitor TV
E-E mode
monitor TV
Adj. Location
Adj. Value
VR (RF AGC)
S/N is best point
(on the 3 in 1 tuner)
3. TEST POINTS FOR TAPE PATH ADJUSTMENT
Test points TP182 (ENV) and TP183 (SW-P) for tape path adjustment are shown in figure below.
For adjustment, refer to the separate volume “ V95
For adjustment, refer to the separate volume “ V95
Ι
Mechanism Manual ” (MM531433) and “ V95
ΙΙ
Mechanism Manual ” (MS531500).
VP-1 PWB Assembly
TP182
(ENV.)
(ENV.)
TP183
(SW-P)
(SW-P)
Fig. 3-1
E
2-4-1. TEST EQUIPMENT AND STANDARD REQUIRED
Monitor TV
2-4-2. LOCATION OF ADJUSTMENT POINT
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