![background image](http://html.mh-extra.com/html/nec/diamond-scan-51/diamond-scan-51_service-manual_249520036.webp)
2. NO OPERATION, POWER LED OFF
1. DC P/S O/P VOLTAGE SET AT 17V,CURRENT SET
AT 200MA. POSITIVE CONNECT TO C112”+”.
NEGATIVE CONNECT TO C105”-“.
2. SCOPE SET AT 10V/DIV, 10US/DIV, PROBE
CONNECT TO Q101-GATE AND C105”-“.
POWER SW
TURN OFF
CHECK
F101
CHECK
Q101
CHECK
U101
U101 PIN6
PULSE O/P
POWER SW
TURN ON
FAILURE
R111, ZD101
CHECK
U101 PIN 7 VCC
PIN 4 SAWTOOTH
PIN 8 5V
NO
33
Summary of Contents for Diamond Scan 51
Page 9: ...6 MultiSync MV521 Diamand Scan 51 ...
Page 71: ...11 Monolithic triple 13 5nS CRT driver 68 ...
Page 72: ...69 ...
Page 73: ...70 ...
Page 74: ...71 ...
Page 103: ...95 SCHEMATIC DIAGRAMS 1 Video Board ...
Page 104: ...96 2 Main Board ...