If Circuit Adjustment; Test Equipment And Standard Required; Location Of Adjustment Point - Sony SLV-L45AR Service Manual

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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.
• 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

Rear Panel
3 in 1 Tuner
CP-1 PWB
Assembly
VR RF AGC
TE
L 13942296513
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 Ι Mechanism Manual " (MM531433) and " V95 ΙΙ Mechanism Manual " (MS531500).
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Fig. 2-4-1
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VP-1 PWB Assembly
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Note:
The 3 in tuner dose not need any adjustments,
because precise adjustments were down before
shipment.
2-4-3. RF AGC ADJ.
Measuring Point Measuring Equipment
Picture of Monitor TV
monitor TV
Adj. Location
VR (RF AGC)
(on the 3 in 1 tuner)
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.
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3. Receive the middle electrical field (70 dBµ ~90 dBµ) of
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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.
4. Confirm by monitor TV that there is no beat and
saturation (S/N is best point) when receiving any TV
channel.
TP183 TP182
(SW-P) (ENV.)
co
.
6-10 E
9 4 2 8
Adj. Condition
E-E mode
Adj. Value
S/N is best point
0 5 8 2 9 9 4 2 8
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Fig. 3-1
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