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Checks and Adjustments
1705A Spectrum Monitor
5-19
2. Adjust CRT Bias
a. Turn the INTENSITY control fully counterclockwise.
b. ADJUST -- R58 (CRT BIAS) so that the display is just extinguished.
c. Set INTENSITY control for a useable display.
CAUTION
MAINS
VOLTAGE
A1 PWR SPLY BD
R11
R45
R49
R58
W1 +5V
CRT
BIAS
ASTIG
GEOM
FOCUS
W4 --15V
W3 +15V
A3 MAIN BD
FRONT
R99 R111
L4
FL1
C69
J11
FL2
C52
C64
C62
R175
R176
R232
R239
R240
W12
W11
R168
R140
R113
R89
W8
R27
R29
R55
R56
R57
W5
W2
R48
R49
R4
R36
R37
R38
R61
R35
R82
R51
R58
R75
R81
+5V
ADJ
R99
Figure 5-7: Adjustment locations