Epson Stylus Color 640 Service Manual page 90

EPSON Stylus Color 440/640/740
Symptom Condition
(Continued) +5V line is dead.
The printer does
not operate at all.
Chapter 3 Troubleshooting
Table 3-5. Repair of the C206/C257 PSB/PSE Board
Cause Checkpoint
IC51 (L4962E/FA3635P) is Stylus Color 440/640:
dead.
• Check the oscillation
Note: (Pin 5) waveform of
IC51.
• L4962 is used for Stylus
Color 440/640.
• FA3635P is used for
Stylus Color 740.
• Check the switching
(Pin 7) waveform of
IC51.
IC51 (L4962E/FA3635P) is Stylus Color 740:
dead.
• Check the switching
Note: (Pin 8) waveform of
IC51.
• L4962 is used for Stylus
Color 440/640.
• FA3635P is used for
Stylus Color 740.
(Pin 5)
(Pin 7)
(Pin 8)
Revision A
Solution
Replace IC51.
Replace IC51.
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