Roadstar HIF-6907 MP, Service Manual

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INSTRUMENTS REQUIRED: AM&FM Signal generator
IF Scope&2tracks Oscilloscope
AM/FM IF ALIGNMENT
Set output of signal generator no higher than necessary to obtain an output reading.
Slide the function switch to the tuner position and the band switch to the AM position.
Set volume control to reference output.
Use loop antenna to Radiate the Signal into the Receiver Antenna..
RADIO SETTING ADJUSTMENT REMARKS
GENERATOR
10.7/
（
AM465
）
KHZ Scope across FM T102 Adjust the
10.8KHz Speaker jack Wave for maximum
10.9KHz Or IC TA2111 AM T101 &good Output
Pin(13 or 14)
AM RF ALIGNMENT
SIGNAL RADIO SETTING INDICATOR ADJUSTMENT REMARKS
GENERATOR
520KHz Tune to 520KHz SCOPE across T103 Adjust for maximum
400Hz (low end). Speaker jack or & good Output.
Modulation IC TA2111
1620KHz Tune to 1600KHz pin(13 or 14) VC101-TCO Adjust for maximum
400Hz (high end). &good output
Modulation
600KHz 600KHz VTVM&SCOPE BAR ANT. -AM Adjust for maximum
Across Speaker &good Output
1400KHz 1400KHz Jack VC101-TAC Adjust for maximum
&good Output
FM RF ALIGNMENT
Connect Signal Generator across antenna terminals.
Adjustment of coils should not be attempted unless the Original coil is deformed or has been replaced.
Slide the function switch to the tuner position and the band switch to the FM position.
Set Volume control to reference output.
SIGNAL
GENERATOR RADIO SETTING INDICATOR ADJUSTMENT REMARKS
87.5MHz Tune to <88MHz L103 Adjust for maximum
1000Hz (low end ) SCOPE across &good Output
modulation Speaker jack or
108.3MHz Tune to
﹥
108MHz IC TA2111 VC101-FMO Adjust for maximum
1000Hz (high end ). Pin(13 or 14) &good Output.
modulation
90MHz 90MHz VTVM&SCOPE L102 Adjust for maximum.
Across SPEAKER &good output
106MHz 106MHz Jack C VC101-FMA Adjust for maximum.
&Good Output
ALIGNMENT PROCEDURES
SIGNAL INDICATOR
Tune to 90.3M/
（
AM 600
）
KHz
high end).
（
AM Lowend
）
Model No.:HIF-6907MP
TITLE: ALIGNMENT
Revision No.: 0
Base Model:Nil Revision Date: 2006-02-09
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