Casio EV-500B Service Manual & Parts List page 9

* Desolder the IF pad to open.
Pattern
generator
Input Input
Connection Point
Pattern
generator Color bar
TP2 45.75 MHz
Signal
70 ± 3 dBµ
generator
* Short the IF pad.
Pattern
generator
Pattern
generator Color bar
TP7
65 ± 5 dBµ
TV signal
generator
BCC Adjustment
Signal
generator
Input
TP2
Input Output
Adjust
Signal Connection
VR301 Oscilloscope
AGC Adjustment
Signal
generator
Input
TP7
VR200 IF levelmeter
Vcom Adjustment
EV-500
set
Output
TP8
VR303 Oscilloscope
— 8 —
EV-500
set
Oscilloscope
Output
CP339(VC)
Output
Point
Adjust VR301 so that the
difference
between pulses
TP5
A and B is less
than 0.2 V.
EV-500
set
Output
TP2
Adjust to obtain a 84 ± 2 dBµ
TP2
reading on the IF levelmeter.
Oscilloscope
Adjust VR303 so that the
high level of the square wave
is at -0.5
TP8
± 0.25 V.
Result
Pulse A Pulse B
IF levelmeter
-0.5 ± 0.25 V
5.0 ± 0.5 V