Epson 200 - Manual (Page 58)

5.2 Unit-Repair - C160 Power Supply Board
This section describes how to repair the C160 power supply board and main board. The table below provides
various symptoms, likely causes, and check points. The checkpoints refer to waveforms, resistances, and
other values to check to evaluate the operation of each component.
T1 is open. Check T1 coils using the tester. Replace T1.
Q1 is broken. Check the wave-form at the drain of Q1. Replace Q1.
Q2 or Q3 is
broken. Check the wave-form at the drain
of Q2 and Q3.
Replace Q2 or Q3.
Check the wave-form at 3-pin of PC1. Replac e PC1. PC 1 is
bro ken.
+5V is dead. L4962 is
broken. Check the oscillation at 5-pin of IC51. Replace IC51.
Check the output wave-form
at 7-pin of IC51.
Replace IC51.
Sympton Condition Cause Checkpoints Solution
Printer does not
operate at all. +35V line is
d e ad . F1 is open. Check the F1. Replace F1.
Table5-3. Repair of the C160 PSB / PSE
Epson Stylus Color 200 /Epson Stylus 200 Troubleshooting
Rev. A 5-3