Onwa KR-1338 Service Manual page 52

From on page 5-10
Check TOTAL ON TIME/
TOTAL TX TIME.
NG
Within rating ?
OK
Check magnetron heater
voltage at ST-BY.
NG
Within rating ?
OK
Faulty magnetron or MIC.
48
KR-1338: 300 to 370 Vdc
KR-1668: 350 to 390 Vdc
KR-1338: 7.4 to 7.6 Vdc
KR-1668: 7.5 to 7.7 Vdc
Check magnetron heater
voltage.
Within rating ?
OK
KR-1338: Faulty pcb MOD-0904A
KR-1668: Faulty pcb MOD-0904B
KR-1338/1668: VR 801 on pcb MOD-0904
NG