Mitsubishi Electric Diamond Pro 930SB, Service Manual

Page: 112 / 187

6-10
7. POOR FOCUS
POOR FOCUS
YES
CHECK
T301 12PIN H-DYNAMIC
PARBOLA WAVEFORM 470Vp-p
V-DYNAMIC PARABOLA
WAVEFORM 130Vp-p
NO
YES
ADJUST
T301 STATIC FOCUS VR AND
DYNAMIC FOCUS VR
NO
1. CHECK STATIC FOCUS AND DYNAMIC
FOCUS VR LINE TO CRT SOCKET.
2. CRT SOCKET OR CRT POOR.
CHECK
T302 H AND V
PARABOLA
WAVEFORM
NO
H-PARABOLA
TROUBLE IN
T302, D303, D318, T301
NO
H-PARABOLA
CHECK
U501 PIN 32
V-PARABOLA WAVE
0.55Vp-p
TROUBLE IN
Q312, C343, R356, R335,
R331, R332, D307, R337
YES
NO
CHECK
FACTORY MODE
V-FOCUS OUTPUT
50~70%
ADJUST V-FOUCS
OUTPUT 50 ~ 70%.
NO
YES