Sony HCD-D390 Service Manual - Page 21

Tuner

Get Sony HCD-D390 - Compact Audio And Video System PDF manuals and user guides View all Sony HCD-D390 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 21 highlights

TUNER SECTION 0dB=1µV Note 1: As a front-end (FE1) is difficult to repair if faulty, replace it with new one. Note 2: No adjustment is needed due to a tuner pack for except AEP, UK, East European, CIS models. AM Tuned Level Adjustment Note: FM Tuned Level adjustment should be performed after this AM Tuned Level Adjustment. Setting: Band: MW loop antenna loop antenna (Supplied accessories) AM RF SSG set 30% amplitude modulation by 400 Hz signal 60 cm AM ANTENNA terminal (TM1) Field strength dB (µV/m) =SSG output level dB (µV/m) -26 dB. \Modulation: 999 kHz (at 9 kHz step) 1,050 kHz (at 10 kHz step) Procedure: 1. Set the output of SSG so that the input level of the set becomes 55 dB. 2. Tune the set to 999 kHz or 1,050 kHz. 3. Adjust RV41 to the point (moment) when the TUNED indicator will change from going off to going on. Adjustment Location: TCB board FM Tuned Level Adjustment Note: This adjustment should be performed after the AM Tuned Level Adjustment. Setting: Band: FM FM RF SSG 75 Ω coaxial set Carrier frequency : 98 MHz Modulation : AUDIO 1 kH, 75 kHz deviation (100%) FM ANTENNA Output level: 25db (at 75 Ω open) terminal (TM1) Adjustment Location: TCB board [TCB BOARD] (Component Side) TM1 RV41 AM Tuner Level RV42 FM Tuned Level IC21 Procedure: 1. Supply a 25 dB 98 MHz signal from the ANTENNA terminal. 2. Tune the set to 98 MHz. 3. Adjust RV42 to the point (moment) when the TUNED indicator will change from going off to going on. - 21 -

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
— 21 —
TUNER SECTION
0dB=1μV
Note 1:
As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
Note 2:
No adjustment is needed due to a tuner pack for except
AEP, UK, East European, CIS models.
AM Tuned Level Adjustment
Note:
FM Tuned Level adjustment should be performed after this
AM Tuned Level Adjustment.
Setting:
Band: MW
Procedure:
1.
Set the output of SSG so that the input level of the set becomes
55 dB.
2.
Tune the set to 999 kHz or 1,050 kHz.
3.
Adjust RV41 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location:
TCB board
FM Tuned Level Adjustment
Note:
This adjustment should be performed after the AM Tuned
Level Adjustment.
Setting:
Band: FM
AM RF
SSG
loop antenna
set
loop antenna
(Supplied accessories)
60 cm
AM ANTENNA
terminal (TM1)
30% amplitude
modulation by
400 Hz signal
\Modulation: 999 kHz (at 9 kHz step)
1,050 kHz (at 10 kHz step)
Field strength dB (
μ
V/m) =SSG output level dB (
μ
V/m) –26 dB.
Carrier frequency
: 98 MHz
Modulation
: AUDIO 1 kH, 75 kHz
deviation (100%)
Output level:
25db (at 75
Ω
open)
FM ANTENNA
terminal (TM1)
75
Ω
coaxial
set
FM RF SSG
Procedure:
1.
Supply a 25 dB 98 MHz signal from the ANTENNA terminal.
2.
Tune the set to 98 MHz.
3.
Adjust RV42 to the point (moment) when the TUNED indicator
will change from going off to going on.
RV41
AM Tuner Level
TM1
RV42
FM Tuned
Level
IC21
Adjustment Location:
TCB board
[TCB BOARD]
(Component Side)