HT-CN300
– 8 –
Test Stage Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
••
••
•
AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
AM IF 450 kHz 1,720 kHz T351 *1
AM Band — 530 kHz (fL): T306 *2
Coverage 1.3 ± 0.1 V
AM Tracking 990 kHz 990 kHz (fL): T302 *1
Figure 8-1 TUNER ADJUSTMENT POINTS
ADJUSTMENT
• FM IF
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually.
OSD SECTION
1: Connect all cables.
2: Power ON
3: Video input (DVD IN or VIDEO 1-IN or VIDEO 2-IN) :NTSC
Signal.
4: Adjust Vfc with rotated of TC432. Vfc range : 2.65 V - 2.75V
(Chick with DC voltmeter, connect (+) of DC voltmeter to pin
26 of IC401, connect (-) of DC voltmeter to pin 2 of
CNP431).
TP302
TP301
T306
VR351
FM MUTE LEVEL
T302
T351
R357
FE301
R381
CNP301
AM/FM
ANTENNA
AM BAND
COVERAGE fL
AM IF
AM TRACKING
fL
TUNER PWB
8
VIDEO PWB
IC401
26
Vcf
(2.65 V - 2.75 V)
TC432
C453
GND
R522
CNP431
Figure 8-2 OSD. ADJUSTMENT POINTS
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