Checks and Adjustments

1705A Spectrum Monitor 5-19

2. Adjust CRT Bias

a. Turnthe INTENSITY control fully counterclockwise.

b. ADJUST -- R58 (CRT BIAS) so that the displayis just extinguished.

c. Set INTENSITY control for a useabledisplay.

CAUTIONMAINSVOLTAG E

A1 PWR SPLYBD

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

Figure5 -7: Adjustment locations