Epson LX-86TM Especificações descarregar pdf (Página 114)

REV.-A

Table 5-5. ROCX Board Unit Repair (Cent’d)

Problem Symptom

Cause

Checkpoint

Solution

The printer does Buzzer

rigns

Home position

Check the level of

IC3B

Replace Gate

ar-

not operate. (The

times. sensor is

Pin 23.

ray (3 B).

power lamp on the

defective.

Carriage at the home

control panel

position: LOW

lights.)

. The l/F cable is

+24V

line is

Check the

+24V

line.

disconnected.

abnormal.

In self-test mode,

Carriage control Phase switching is

Measure the wave-form

Replace the

re-

printing is is abnormal.

abnormal.

of transistors Q12, 13,

fective transistor

abnormal

16, 17 collector. Refer to

(or

IC3B).

Figure 2-19.

Common voltage Check the voltage of

Replace

Q19 (or

switching is

transistor

Q19 emitter.

IC2B).

defective.

In driving:

+24V

In holding

+5V

.—

Paper feed con-

Phase switching is Measure the wave-form

Replace the

de-

trol is abnormal. abnormal. of transistors Q 10, 11,

fective transistor

14, 15 collector. Refer to

(or

IC3B).

Figure 2-25.

Common voltage Check the voltage of

Replace

Q18 (or

switching is

transistor Q 18 emitter.

IC2B).

defective. In driving:

+24V

In holding:

+5V

A specific dot is

Printhead drive is

Observe the high/low

If there are not

missing.

defective. change at HDn (Pin 55 -

high/low

63) of the

IC4B and at

changes, replace

collector of transistor

Qn.

IC3B. Otherwise,

replace any de-

fective

,..,c%i

transistors.

“n”~

5-13

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 141 142

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