If Circuit Adjustment; Test Equipment And Standard Required; Location Of Adjustment Point; Test Points For Tape Path Adjustment - Sony SLV-E120AE Service Manual

2-3. 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.

2-3-1. TEST EQUIPMENT AND STANDARD REQUIRED

Monitor TV

2-3-2. LOCATION OF ADJUSTMENT POINT

Rear Panel
3 in 1 Tuner
CP-1 PWB
Assembly
VR RF AGC

3. TEST POINTS FOR TAPE PATH ADJUSTMENT

Test points TP182 (ENV) and TP183 (SW-P) for tape path adjustment are shown in figure below.
3 in 1 Tuner
Fig. 2-3-1
VP-1 PWB Assembly
Note:
The 3 in tuner dose not need any adjustments,
because precise adjustments were down before
shipment.
2-3-3. 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.
3. Receive the middle electrical field (70 dBµ ~90 dBµ) 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.
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.)
6-7 E
Adj. Condition
E-E mode
Adj. Value
S/N is best point
Fig. 3-1