Read Sony HCD-H100 / MHC-C10 / MHC-G100 (serv.man2) Service Manual online
— 10 —
FM Tuned Level Adjustment
Tuner board
G
VT
TP2
Procedure :
1. Set the reception frequency of the unit to 87.5 MHz.
2. Adjust L103 for 1.2
1. Set the reception frequency of the unit to 87.5 MHz.
2. Adjust L103 for 1.2
±
0.05V reading on the DC voltmeter.
3. Set the reception frequency of the unit to 108 MHz.
4. Confirm that the voltage reading on the DC voltmeter is within
4. Confirm that the voltage reading on the DC voltmeter is within
7.8
±
0.5V.
FM Tracking Adjustment
(EXCEPT AEP, UK, German model)
(EXCEPT AEP, UK, German model)
TUNER SECTION
0 dB=1
µ
V
Note: As a FM front end (U1) is difficult to repair if faulty, replace it
with new one. (AEP, UK, German model)
FM Section Adjustment
FM Tuning Voltage Adjustment
(EXCEPT AEP, UK, German model)
FM Tuning Voltage Adjustment
(EXCEPT AEP, UK, German model)
FM RF SSG
oscilloscope
FM ANTENNA terminal (JK101)
SPEAKER terminal (JK301)
set
Carrier frequency : 90 MHz, 106 MHz
Modulation
Modulation
: AUDIO 1kHz, 75kHz deviation (100%)
Output level
: 20 dB (at 75
Ω
open)
Procedure:
1. Tune the set to 90 MHz.
2. Adjust L102 so that when the waveform on the oscilloscope is
1. Tune the set to 90 MHz.
2. Adjust L102 so that when the waveform on the oscilloscope is
maximum, no noise appears.
3. Tune the set to 106 MHz.
4. Adjust TC101 so that when the waveform on the oscilloscope is
4. Adjust TC101 so that when the waveform on the oscilloscope is
maximum, no noise appears.
• Repeat the procedures in each adjustment several times, and the
tracking adjustment should be finally done by the trimmer
capacitors.
capacitors.
+
–
+
–
Carrier frequency : 98 MHz
Modulation
Modulation
: AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level
: 28 dB
FM RF SSG
set
75
Ω
coaxial
FM ANTENNA terminal
(JK101)
(JK101)
Procedure:
1. Supply a 28 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust SFR101 to the point (moment) when the TUNED indica-
1. Supply a 28 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust SFR101 to the point (moment) when the TUNED indica-
tor will change from going off to going on.
AM Section Adjustment
AM Tuning Voltage Adjustment
AM Tuning Voltage Adjustment
DC voltmeter
DC voltmeter
Tuner board
G
VT
TP2
Procedure:
1. Set the reception frequency of the unit to 530 kHz (10 kHz step)
1. Set the reception frequency of the unit to 530 kHz (10 kHz step)
or 531 kHz (9 kHz step).
2. Adjust L105 for 1.2
±
0.05 V reading on the DC voltmeter.
3. Set the reception frequency of the unit to 1,710 kHz (10 kHz step)
or 1,602 kHz (9 kHz step).
4. Confirm that the voltage reading on the DC voltmeter is within
8.0
±
0.5 V.
+
–
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