HP 120A - Page 49

Sect. IV Page 9
TABLE 4-1. REPLACEMENT CHART
IF YOU
REPLACE
FUNCTIONS
PERFORM TESTS AS
GIVEN IN SECTION:
Q 301
Regulator Transistor
4-7 a; 4-8 a;
Q 302
Amplifier Transistor
4-7 a; 4-8 a;
S 1
AC-D C Switch
None
S 2
Vertical Sensitivity Switch
4-10 a, b, g, h, i;
S 101
AC-D C Switch
None
S 102
Sweep Expand Switch
None
S 201
Sync Switch
4-9 c, h;
S 202
Trigger Level
4-9 d-g;
S 204 Sweep Time-Horizontal Sensitivity
4-11 a-h; 4-12 a-g;
S 205 Sweep Expand Switch
None
S 301
Intensity-ON Switch
4-8 c;
S 303
Scale Light Control
None
VI Input Amplifier Tube
4-10 a, b, d;
V 2
Amplifier Tube
4-10 a, b, d, e;
V 3
Output Amplifier Tube
4-10 a-f;
V101
Amplifier Tube
4-11 a-h; 4-12 a, b;
V 102 Output Amplifier Tube
4-11 a-h; 4-12 a, b;
V 201
Trigger Generator Tube
4-9 a-h;
V 202 Start-Stop Trigger Tube
4-9 b;
V 203
Gate Inverter Tube
4-12 o;
V 204
Integrator Switch Tube
None
V 205
Sawtooth Integrator Tube
4-12 a, b, k;
V 301 Amplifier Tube
4-8 b;
V 302
Oscillator Tube
4-8 b;
V 303
Rectifier Tube
4-8 b;
V 304 Rectifier Tube
4-8 b;
V 305
Cathode Ray Tube
4-7 c, d; 4-8 b; 4-10 b;
4-11 b; 4-12 a, b;
V 306 Rectifier Tube
4-8 a;
V 307
Regulator Tube
4-8 a;
V 308 Amplifier Tube
4-8 a;
V 309 Rectifier Tube
4-8 a;
V 310
Regulator Tube
4-8 a;
V 311
Amplifier Tube
4-8 a;
V 312
Reference Tube
4-8 a;