4
MC-DX50i
AM I.F. ALIGNMENT
1. Set the POWER BUTTON to POWER "ON".
2. Set the Radio and band button to Radio and AM BAND.
3. Connect a SWEEPSCOPE OUTPUT to AM antenna terminal.
4. Connect a SWEEPSCOPE INPUT to pin17 of IC2 through a 1uf capacitor and ground.
STEP
SET SIGNAL
SET DIAL
ADJUST
ADJUST FOR
1
4455KHz
GANG OPEN
T3
CENTER
&MAXIMUM OUTPUT
AM R.F. ALIGNMENT
1. Connect an RF generator to a standard radiating loop.
2. Connect a SCOPE and VTVM across the speaker output.
STEP
SET SIGNAL
SET DIAL
ADJUST
ADJUST FOR
1
515KHz
GANG CLOSED
L6
MAXIMUM
OUTPUT
2
1640KHz
GANG OPEN
PVC-D
3
600KHz
1400KHz
L4
4
1400KHz
1400KHz
PVC-C
5
REPEAT STEPS 3 AND 4 TO OBTAIN BEST TRACKING.
FM R.F. ALIGNMENT
1. Connect an RF generator to the FM antenna terminal and ground.
2. Connect a SCOPE & VTVM across the speaker output.
STEP
SET SIGNAL
SET DIAL
ADJUST
ADJUST FOR
1
76MHz
GANG CLOSED
L3
MAXIMUM
OUTPUT
2
108MHz
GANG OPEN
PVC-A
3
90MHz
90MHz
L2
4
106MHz
1106MHz
PVC-B
5
REPEAT STEPS 3 AND 4 TO OBTAIN MAX ADJUST.
CD ALIGNMENT
Auto alignment.
3 ADJUSTMENTS AND CHECKS
ALIGNMENT PROCEDURES
Summary of Contents for MC-DX50i
Page 5: ...MC DX50i 4 EXPLODED VIEW AND PARTS LIST 5 EXPLODED VIEW ...
Page 10: ...10 MC DX50i MCU KEY PCB ...
Page 12: ...12 MC DX50i CD PCB ...
Page 14: ...14 MC DX50i STANDBY PCB SUB POWER PCB ...
Page 16: ...16 MC DX50i IPOD PCB RCA JACK PCB SUBWOOFER LED PCB ...
Page 19: ...19 MC DX50i MCUIKEY PCB CD PCB MAIN PCB IPOD PCB S VIOEO PCB ...
Page 23: ...MAIN PCB MC DX50i Micro Hi Fi system ...
Page 24: ...MAIN PCB MC DX50i Micro Hi Fi system ...
Page 25: ...CD PCB MC DX50i Micro Hi Fi system ...
Page 26: ...CD PCB MC DX50i Micro Hi Fi system ...
Page 27: ...MUC KEY PCB MC DX50i Micro Hi Fi system ...
Page 28: ...POWER USB WOOFER PCB MC DX50i Micro Hi Fi system ...