77
edits
PG506/Repairs: Difference between revisions
m
FAILED PG506 and Repairs
m (Diagnosis of Failed Display section of PG506.) |
m (FAILED PG506 and Repairs) |
||
| Line 18: | Line 18: | ||
WAVE FORMS Photographed on TDS460A. See photos for scope settings as these can vary from photo to photo. | WAVE FORMS Photographed on TDS460A. See photos for scope settings as these can vary from photo to photo. | ||
During this repair, I found these parts defective. The repairs were much more than a non-functional display. The display was the last thing to get working. | |||
In the course of the repairs, I found these components bad in the unit. | |||
Q435 151-0223-00 NPN | |||
Q535 151-0223-00 NPN | |||
U460 156-0067-00 OP amp (741CN) | |||
U200 156-0067-00 OP amp (741CN) | |||
U240 156-0067-00 OP amp (741CN) | |||
U610 156-0039-00 Dual J-K Flip-Flop | |||
U480 156-0399-00 Opto Coupler | |||
U255 156-0399-00 Opto Coupler | |||
CR290 152-0141-02 (1N4152R) | |||
CR291 152-0141-02 (1N4152R) | |||