SM1540-D SM7020-D SM3004-D DELTA ELEKTRONIKA BV
1989 rev. May 2008 OPERATING MAINTENANCE TROUBLE SHOOTING CALIBRATING Page 4 - 7
9) NO LEDS on.
• Overheating can be the cause, cooling down will re set the ther mal
pro tec tion.
• Check in put power and in put fuses (on rear panel)
10)
CHECK POINTS IN CASE OF A SE RIOUS FAIL URE
• Check out put di odes. De fective di odes give a short.
SM1540-D Check di odes D400 - D403
SM7020-D Check di odes D400 and D402 on P380
SM3004-D Check di odes D400 - D404, D410 - D414,
D420 - D424, D440 - D434 on P381
Re place de fec tive parts.
• Fuse F300 is blown. Do not re place F300 un til unit is re paired.
Prob a bly de fect on P378. First check out put di odes, see above.
• Re pairing P378.
Check di odes D301 - D308, check tran sistors Q300 - Q303.
When de fective they usu ally give a short. Re place de fective com-
po nents.
• If nec es sary, send P378 for re pair.
Check fuses
on rear panel
No Out put
No LED on
Re place P382
One or more
LED on
Check fuse F300
P377
Pro ceed with
sec tion: Fuse
F300 is blown
Pro ceed with
sec tion: Check
out put di odes
BlownO.K.
The unit is not
over heated
fig. 4 - 20 Lo cation of F300 on P377
F300
fig. 4 - 21 Lo cation of OVP, CV and CC LED's
fig. 4 - 22 P378: in dicated are the po larity of the di odes (K) and the FET's (G/D/S)
To Next Page
Loading...
Need help?
General
