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1. NO OPERATION, POWER LED FLASH
1. DC P/S O/P VOLTAGE SET AT 17V,CURRENT SET
AT 600MA. POSITIVE CONNECT TO C130”+”.
NEGATIVE CONNECT TO U102-pin 5.
2. SCOPE SET AT 10V/DIV, 10US/DIV, PROBE
CONNECT TO Q102-GATE AND U102pin 5.
POWER LED FLASH
CHECK
U102
U102 PIN6
PULSE O/P
POWER SW
TURN OFF
FAILURE
R136, ZD103
CHECK
U102 PIN 7 VCC
PIN 4 SAWTOOTH
PIN 8 5V
NO
POWER SW
TURN OFF
MULTIMETER TEST
Q307, Q102
D110,D111,D112,D113
32
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 ...