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C148GTL DX ALIGNMENT PROCEDURE
STEP
PRESET ТО
ADJUSTMENT
REMARKS
6
Same as Step 1
VRll
Set the SG output level to lOOuV with No
modulation. Then adjust VRl for S-9 read
ing on radio's meter.
7
Same as step 1
except:
Mode: FM
L9 and L10
Set the SG to lOuV with No-Modulation.
Connect Oscilloscope to lead of R279, and
adjust ooils for maximum reading(Pin 1&2
of IC 2).
8
Same as Step 7
L U
Set the SG to ImV with 1.5kHz déviation
of 1kHz. Adjust Lll for maximum sign-wave
output on Oscilloscope.
ALIQMENT OF TRANSMITTER PORTION.
1. Test Equipment Required
a) DC Arrmeter.
b) Power meter.
c ) RF VTVM
d) Oscilloscope.
e) Deviation Meter.
f) 50 ohm Dummy Load.
g) Frequency counter.
2. Alignment Precedure
STEP
PRESET TO
ADJUSTMENT
REMARKS
1
CH
: 19
TX Mode
Mode
: USB
Mic Gain: Min.
VR10
Remove PC-843 (PCB) and connect Arrmeter
to TP8 (+) and TP7 (-). Adjust for 8mA
reading.
2
Same as Step 1
VR9
Connect DC Anmeter to TP8 (+) and TP6 (-)
and adjust for 100mA reading.
Summary of Contents for 148GTL-DX
Page 32: ...со SO AOJ VR2 BLOCK DI AGRAM ...
Page 33: ...SCHEMATIC DIAGRAM ...
Page 41: ...Parts Layout Top View Î37 2SB525C 1 4 1 5 ...
Page 42: ...PARTS LAYOUT Top View ...
Page 43: ...ADDED PARTS MAIN PCB Bottom View PC 879AB ...
Page 44: ...COPPER PATTERN SWR PCB CH SW PCB LED PCB CD ...
Page 48: ...го w INTERNAL DIAGRAM IC s MB87I9 ...
Page 49: ...INTERNAL DIAGRAM IC s го А ...
Page 50: ...INTERNAL DIAGRAM IC s S 0 4 2 P 25 ...
Page 58: ...со го BLOCK DI AGRAM ...
Page 59: ...PB OIO SCHEMATIC DIAGRAM ...
Page 60: ...WiRING DIAGRAM 3 5 3 6 P C 881 P C 8 8 0 ...
Page 66: ...COPPER PATTERN MAIN PCB ...
Page 68: ...P B O I O ADDED PARTS MAIN PCB H fs il 8 46 ...
Page 70: ...COPPER PATTERN SUB ASSY PCB s ...
Page 71: ...PARTS LAYOUT MIC JACK 49 ...
Page 74: ...INTERNAL DIAGRAM IC s MC14008B 1 4 Cou l 13 S 4 13 S 3 11 S2 10 S 1 16 15 14 13 12 11 10 9 52 ...
Page 75: ...сл С О INTERNAL DIAGRAM IC s OSC out Г 2 out FS PO PI P2 P3 PA P5 P6 P7 P8 MC145106 ...
Page 76: ...INTERNAL DIAGRAM IC s 14 0UT4 13 I N 4 12 lN 4 11 VEE 10 IN 3 9 I N 3 8 0UT3 TA75902P 54 ...