Onwa KR-1338, Service Manual

Page: 53 / 71

From on page 5-10
Check TX pulselength
selection signal.
Check DJ-1 #7,#8
on display unity for
proper operation.
Magnetron usage time
within in 2000 hrs.
Check if AUTOMATIC
TUNE voltage is output from
display unit.
(Switch from ST-BY to TX)
Check level at DJ-1 #6
on display unit changes
normally.
Check TUNE IND. Voltage
input to display unit.
(Switch from ST-BY to TX)
Max. Value
OK OK
OK
OK
OK
Faultu MIC.
NG
NG
Faulty pcb MAIN-0910.
Replace magnetron.
KR-1338/1668: 5 V to 28 V
NG
Faulty pcb MAIN-0910.
All model: 1 to 2.5V
NG
KR-1338//1668: Faulty pcb IF-0711.
Signal 0.25 NM
PL B, DJ-1 #7
PL A, DJ-1 #8
2 NM 12 NM
0 V 0 V 12 V
0 V 12 V 12 V
49