Dynamic Focus Board Transistor Resistance Measurements; Pin Board Transistor Voltage Measurements; Pin Board Ic Voltage Measurements; Video Board Transistor Voltage Measurements - Zenith ZCM-1490 Service Manual

Table
6-7.
Dynamic Focus Board Transistor Table
6-9
(continued).
PIN
Board
IC
Voltage
Resistance Measurements Measurements
DEVICE EMITIER BASE
COLLECTOR PIN IC7001 IC7501
07701 21560 8.01kn 11.78kn 5 -1.37V
-7.02V
07702 19950 11.78kn
51.3kO 6 -1.33V OV
07703
10030 19940 51.3kO 7 -11.9V -16.05V
8 0.041 V -5.65V
NOTE: These measurements were taken with the PIN 9 0.002V -5.65V
board removed and disconnected from the rest of the 10
-1.37V
-7.02V
monitor.
11 -1.36V -7.06V
12 0.003V -5.69V
13 -10.67V OV
Table
6-8. PIN
Board Transistor Voltage
14 8.18V 6.39V
Measurements
DEVICE EMITIER BASE COLLECTOR
Table
6-10.
Video Board Transistor Voltage
Measurements
07001 1.19V 0.61V -10.6V
07007 8.73V 8.13V 0.87V
DEVICE EMITIER BASE COLLECTOR
07008 8.41V 7.81V -1.38V
07009 0.315V 0.93V 16.6V 05201 0.80V 1.S5V 4.50V
07401 16.6V 16.29V 7.81V
05202 4.50V 4.94V 73.0V
07402 0.019V
-1.84V .
13.6V 05203 73.9V 74.4V 88.7V
07411 12.5V 13.13V 16.7V
05204 73.7V OV 73.1V
07502 0.58V. 0.019V -15.0V ·05205 0.805V 1.52V 4.48V
,
07503 -0.64V 0.OS2V -7.65V 05206 4.48V 4.94V 72.9V
07505 ~0.5V 0.114V 15.08V
05207 73.7V 74.2V 88.8V
05208 73.5V 72.8V 0.001V
05209 . 0.80V 1.53V 4.48V
Table
6-9. PIN
Board
IC
Voltage Measurements
Q521 0 4.48V 4.94V 73.1V
05211 73.8V 74.4V 88.9V
PIN IC7001 IC7S01
05212 73.7V 0.01V
73.2V
05301 85.5V 85.SV 0.001V
S.45V 0.019V
05302 85.5V 85.6V 0.001V
2 7.8SV 6.27V
05303 85.5V 85.6V 0.001V
3 -10.63V -14.8V
05304 0.60V 0.814V 72.0V
4 0.03V OV
Troubleshooting .
Page 6-13