Sony PMC-DR50L Service Manual page 22

LW FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display
L10 153kHz
CT5 297kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L7
CT3
FM FREQUENCY COVERAGE CONFIRMATION
Adjust part Frequency display
Confirmation 87.5MHz
Confirmation 108MHz
Connect and Adjustment Location :
[MAIN BOARD] (Component side)
reading on digital
voltmeter
Adjustment value :1.4V
Standard value : 1.2 – 1.6V
Adjustment value :5.5V
Standard value : 5.4 – 5.6V
162kHz
261kHz
reading on digital
voltmeter
1.2 – 1.8V
7.7 – 7.9V
T2 : MW/LW IF Adjustment
L10 : LW Frequency coverage Adjustment
SR1 : Auto Stop Level Adjustment
– 22 –
Auto Stop Level Adjustment
BAND button : FM
Volume : MIN
FM RF signal
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : 30dB µ
1. Set the frequency of FM SSG to 98MHz.
2. Press the TUNE button of the unit to start the AUTO TUNING.
3. Adjustment the SR1 to stop the auto tuning at 30dBµ SSG out-
put.
CT5 : LW Frequency coverage Adjustment
CT102 : MW Tracking Adjustment
VT
GND
TP1
CT3 : LW Tracking Adjustment
CT4 : MW Frequency coverage Adjustment
L5 : MW Frequency coverage Adjustment
0.01 µ F
FM EXT.
ANT.
terminal
MW/LW frequency coverage
FM frequency coverage
100 k Ω
+
–
Digital voltmeter
L4 : MW Tracking Adjustment
L7 : LW Tracking Adjustment