H1406
ALIGNMENT PROCEDURES
AM IF. ALIGNMENT
1, Set the FUNCTION switch to “RADIO” position.
2, Set the BAND switch to “AM” position.
3, Connect a SWEEPSCOPE OUTPUT to AM standard radiating loop antenna and match the
direction for built-in ferrite bar of AM antenna.
4, Connect a SWEEPSCOPE INPUT to pin 13 or 14 of IC1 through a 1uf capacitor and GND.
STEP SET SIGNAL
SET DIAL
ADJUST
ADJUST FOR
1
465KHz LOW-END OF BAND
T5( IFT,YELLOW)
CENTER & MAXIMUM OUTPUT
AM RF. ALIGNMENT
1, Connect a RF GENERATOR to the standard radiating loop antenna.
2, Connect a SCOPE and VTVM across the speaker output
STEP SET SIGNAL
SET DIAL
ADJUST
ADJUST FOR
1
520KHz
LOW-END OF BAND
T2(AM OSC)
MAXIMUM OUTPUT
2
1620KHz
HIGH-END OF BAND
PVC3 ( AM OSC TRIMMER)
MAXIMUM OUTPUT
3
REPEAT
STEP 1 & 2
TO MAXIMUM
4
612KHz
NEAR 612KHz
L104(AM SENS COIL)
MAXIMUM OUTPUT
5
1404KHz
NEAR 1404KHz
PVC4 (AM ANT TRIMMER)
MAXIMUM OUTPUT
REPEAT
STEP 4 & 5
TO MAXIMUM
FM IF. ALIGNMENT
1, Set the BAND switch to “FM” position.
2, Connect a SWEEPSCOPE OUTPUT to pin 23 of IC1 through a 20pf capacitor and GND.
3, Connect a SWEEPSCOPE INPUT to pin 13 or 14 of IC1 through a 1uf capacitor and GND.
STEP SET SIGNAL SET DIAL
ADJUST
ADJUST FOR
1
10.7MHz
T6(FM DISCRI.,PINK)
WITH 10.7MHz AT ZERO CROSSOVER
& MAKE THE “S” CURVE TO FINER.
2
REPEAT
STEP 1 TO
FINEL
FM RF. ALIGNMENT
1, Connect a RF GENERATOR to the terminal of FM telescope antenna and GND.
2, Connect a SCOPE and VTVM across the speaker output.
STEP SET SIGNAL
SET DIAL
ADJUST
ADJUST FOR
1
64MHz
LOW-END OF BAND
L3 (FM OSC)
MAXIMUM OUTPUT
2
108MHz
HIGH-END OF BAND
PVC1 (FM OSC TRIMMER)
MAXIMUM OUTPUT
3
REPEAT
STEP 1 & 2
TO MAXIMUM
4
90.1MHz
NEAR 90.1MHz
L4(FM SENS COIL)
MAXIMUM OUTPUT
5
106.1MHz NEAR
106.1MHz
PVC2(FM
ANT
TRIMMER)
MAXIMUM
OUTPUT
6
REPEAT
STEP 4 & 5
TO MAXIMUM
CASSETTE PARTS ALIGNMENT
1, MOTOR TURNSPEED: Adjust the screw at motor back side to make the output signal near
3KHz while play the 3KHz standard tape. It used frequency meter connected output.
2, HEAD AZIMUTH: Adjust the screw of head azimuth to make the 6.3KHz signal to maximum.
It play the 6.3KHz standard tape and used VTVM connected output.
