C148GTL DX ALIGNMENT PROCEDURE
ALIGNENT OF PLL AND CARRIER OSCILLATOR SECTION.
1. Test Equipment Required:
a) Oscilloscope
b) DC Voltmeter
c) Frequency Counter
2. Alignment Procedure.
STEP
PRESET ТО
ADJUSTMENT
REMARKS
1
CH :19
RX Mode
Mode AM
Voice Lock:
Center
Band: MID
LI
4
Connect Oscilloscope to TP4 (lead of R83).
Adjust for maximum indication on Oscillo
scope.
2
Same as above,
except:
CH
: 40
L15
Connect DC Voltmeter to TP2 (lead of R93).
Adjust for 5.4V reading on DC Voltmeter.
3
Same as Step 1
L16
Connect Oscilloscope to TP3 (lead of
R101). Adjust for maximum indication on
Oscilloscope.
4
Same as Step 1
L31
Connect Frequency Counter to TP3 (lead of
R101). Adjust for 16. or - 20Hz.
5
Same as Step 1
CH
: 40
Mode
: USB
L32
Adjust for 16.4 or - 20Hz.
6
Same as Step 1
CH
: 40
Mode
: LSB
L33
Adjust for 16.4 or - 20Hz.
7
Same as Step 6,
CH
: 40
TX Mode
VR6
Adjust for 16.4 or - 20Hz.
8
Same as Step 1
CH
: 40
Band
: Lew
L22
Adjust for 16. or - 20Hz.
Effectivity: S/N 03000001-4498
S/N 13000001-1504
EARLY
VERSION
Note: Two TP4 are noted on procedure. One is R83 and the other one is R114.
8
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 ...