GE 27GT720TX1, Техническая сервисная информация

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TUNER CIRCUIT VOLTAGE CHART
Page 1 SET 4776
Pin VHF Low VHF High UHF
No. Band Band Band
U17301
1 4.9V 4.8V 4.8V
2 3.1 3.1V 3.1V
3 7.6V 7.6V 7.6V
4 3.1 3.1V 3.1V
5 7.6V 7.6V 7.5V
6 0V 0V 0V
7 6.4V 6.3V .2V
8 9.2V 9.2V 9.2V
9 3.4V 3.4V 3.4V
10 3.2V 3.2V 3.0V
11 7.2V 6.8V 9.2V
12 3.2V 3.2V 3.0V
13 0V 0V 0V
14 9.3V 9.2V 6.4V
15 3.5V 3.5V 3.2V
16 3.5V 3.5V 3.2V
NOTE: VHF Low Band voltages taken on channel 2.
VHF High Band voltages taken on channel 7.
UHF Band voltages taken on channel 14.
Pin VHF Low VHF High UHF
No. Band Band Band
U17401
1 1.8V 1.8V 1.9V
2 1.2V 4.0V 5.3V
3 2.6V 2.6V 2.6V
4 34.0V 34.0V 34.0V
5 2.3V 4.4V 4.8V
6 1.6V 4.8V 4.9V
7 1.8V 4.4V 4.8V
8 2.1V 5.1V 4.3V
9 5.0V 5.0V 5.0V
10 1.5V 1.5V 1.5V
11 1.5V 1.5V 1.5V
12 0V 0V 0V
13 1.2V 1.2V 1.2V
14 11.1V 11.1V .3V
15 0V 0V 3.9V
16 3.9V 3.9V 3.9V
17 11.7V 11.7V 11.7V
18 4.9V 4.9V 4.9V
19 4.9V 4.9V 4.9V
20 0V 0V 0V
Pin VHF Low VHF High UHF
No. Band Band Band
Q17101
G1 0V 0V 1.8V
G2 5.1V 5.1V 5.1V
D 0V 0V 0V
S 0V 0V 0V
Q17102
G1 1.8V 1.8V 0V
G2 5.3V 5.3V 5.3V
D 11.7V 11.6V 0V
S 0V 0V 0V
Q17402
E 12.0V 12.0V 12.0V
B 11.7V 11.0V 11.7V
C -11.3V -11.6V -11.1V
Q17403
E 12.0V 12.0V 12.0V
B .5V .6V 11.4V
C 11.8V 11.6V .1V
Q17404
E 12.0V 12.0V 12.0V
B 11.8V 11.7V 0V
C .5V .6V 11.4V
TEST EQUIPMENT
Test equipment listed by participating manufacturer illustrates typical or equivalent equipment used by Sams engineers to obtain
measurements. This equipment is compatible with most types used by field service technicians.
Equipment Sencore No.
Oscilloscope SC3100
Generators
RGB CM2125
Multiburst Signal VG91
Color Bar VG91
TV Stereo VG91
Digital VOM SC3100
Frequency Meter SC3100
Hi-Voltage Probe HP200
Accessory Probes TP212
Equipment Sencore No.
Isolation Transformer PR570
Capacitance Analyzer LC102
CRT Analyzer CR7000
AC Leakage Tester PR570
Inductance Analyzer LC102
Flyback Yoke Tester TVA92
Field Strength Meter SL753
Transistor Tester TF46
Horizontal Analyzer HA-2500
Video Analyzer VG91, TVA92