Acom 1500 Manual de substituição

Procurar online ou descarregar pdf Manual de substituição para Amplificador Acom 1500. Acom 1500 9 páginas. Tube replacement

This step-by-step instruction is about the tube replacement and idling currents

re-adjustment of ACOM1500 power amplifier. Please follow all details closely since

the work is difficult, with many details to keep track about, and might be

dangerous too. Do not hesitate to contact your local dealer or nearest ACOM's

service for any advice. Please don't attempt tube replacement by yourself, if you

don't feel comfortable with repairs!

SAFETY FIRST!

W A R N I N G

===========================

The amplifier works with high voltages up to

safety pull the amplifier power plug out of the mains wall outlet and WAIT AT

LEAST 30minutes EACH TIME BEFORE you remove the cover of the amplifier. Disconnect

all cables from the amplifier (grounding last). Do not touch any part inside while

the amplifier is open because some residual voltages may still be present!

Using a Philips-2 screwdriver, unscrew 9 pcs of "eco-fix" flange-button head

screws to release the top cover (2x3 pcs on each bottom-side edge, and three more

on the rear-top edge of the box).

Lift the rear edge of the cover slightly (to 2-3cm) and then pull the cover

backwards, in order to release it from front-panel's chutes. Remove the top cover.

You will see inside:

- the MAINS PCB that is mounted on an aluminum sub-chassis, just above the big HV

transformer;

- the HV rectifier PCB in front of the MAINS PCB (with four big diodes, one wire-

wound resistor, and one disc ceramic capacitor on it);

- the HV filter PCB, located just below the HV rectifier (with 8 electrolytic

capacitors on it).

ACOM1500 TUBE REPLACEMENT

3000V

which

is LETHAL!

For your