Mic 1 Rf Adjustment; Mic 2 Rf Adjustment; Mic 1 Deviation Adjustment - Sony BVP-500 Maintenance Manual

5-23. Audio Modulation/Demodulation Adjustment

5-23-2. MIC 1 RF Adjustment

5-23-3. MIC 2 RF Adjustment

5-23-4. MIC 1 DEVIATION Adjustment

5-23-2. MIC 1 RF Adjustment
Notes :
• This adjustment requires longer warm-up periods (10 to
30 minutes).
• Use a plastic core driver to adjust 1LV.
Equipment : Frequency counter
Test Point : TP2/TR-90 (E-2)
Adjustment Point : 1LV2 (6.2 MHz)/TR-90 (E-3)
: 6,200 ±5 kHz
Specifications
5-23-3. MIC 2 RF Adjustment
Notes :
• This adjustment requires longer warm-up periods (10 to
30 minutes).
• Use a plastic core driver to adjust 1LV.
Equipment : Frequency counter
Test Point : TP4/TR-90 (F-2)
Adjustment Point : 1LV3 (6.7 MHz)/TR-90 (F-3)
: 6,700 ±5 kHz
Specifications
4
TR
A
B
C
D
E
RV2
F
G
TR-90 BOARD (A SIDE)
5-30
3 2 1
LV2
TP2
LV3
TP4
5-23-4. MIC 1 DEVIATION Adjustment
Note :
• This adjustment requires longer warm-up periods (10 to
30 minutes).
Equipment : Spectrum analyzer
Audio generator
Preparations :
• SW6 (MIC LINE SEL)/AU-211 (E-4) → MIC 1
• CCU-700/700P/700A/700AP setting
S1003 (MIC LEVEL CH1)/AT-88 panel→ NORM
• Feed an 1.0-kHz, –60 dBu (2.2 mVp-p) sine wave signal
from the audio generator to the MIC CH-1 connector.
(Refer to Section 5-1-4 "Connection—For audio adjust-
ments".
Test Point : TP2/TR-90 (E-2)
Adjustment Point : 1RV2 (MIC1 DEV)/TR-90 (E-4)
: A = 16.0 ±0.8 kHz
Specifications
CENTER FREQ 6.2 MHz
SPAN 50 kHz
RBW 1 kHz
Resetting after Adjustment:
• S1003/AT-88 → customer-set position
BVP-500
BVP-500P