Read Sony CMT-EH12 / HCD-EH12 Service Manual online
11
HCD-EH12
AM VT VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L852
531 kHz
1.5
±
0.1 V
Confirmation
1602 kHz
7.2
±
0.5 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L851
531 kHz
FM VT VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L805
87.5 MHz
1.75
±
0.1 V
Confirmation
108 MHz
6.2
±
0.5 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L804
98 MHz
FM DETECTOR ADJUSTMENT
Setting:
Function: TUNER
TUNER BAND button: FM
Function: TUNER
TUNER BAND button: FM
1. Tune the set to 98 MHz.
2. Adjust L806 so that modulation distortion may become the
2. Adjust L806 so that modulation distortion may become the
best in the vicinity of the maximum value where the tuner out
level becomes -156Bs or more.
level becomes -156Bs or more.
Adjustment Location:
set
MAIN board
JW403
(TUNER OUT L-ch)
JW403
(TUNER OUT L-ch)
MAIN board
JW148 (GND)
JW148 (GND)
Carrier frequency : 98 MHz
Modulation
Modulation
: deviation by
FM 75 kHZ
Output level
: 60 dB
FM RF Signal
generator
generator
L851
AM Tracking
Adjustment
L805
FM VT
Voltage
Adjustment
L804
FM Tracking
Adjustment
L806
FM Detector
Adjustment
L852
AM VT
Voltage
Adjustment
– MAIN Board (Component Side) –
JW403
(TUNER OUT L-ch)
JW402
(TUNER OUT R-ch)
JW148
(GND)
JW821
(VT)
CNP802
JW805
(GND)
– MAIN Board (Conductor Side) –
3
1
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