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MZ-R701/R701DPC

NOTES ON HANDLING THE OPTICAL PICK-UP

BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electro-

static break-down because of the potential difference generated

by the charged electrostatic load, etc. on clothing and the human

body.

During repair, pay attention to electrostatic break-down and also

use the procedure in the printed matter which is included in the

repair parts.

The flexible board is easily damaged and should be handled with

care.

NOTES ON LASER DIODE EMISSION CHECK

Never look into the laser diode emission from right above when

checking it for adjustment. It is feared that you will lose your sight.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK

(LCX-4R)

The laser diode in the optical pick-up block may suffer electro-

static break-down easily. When handling it, perform soldering

bridge to the laser-tap on the flexible board. Also perform mea-

sures against electrostatic break-down sufficiently before the op-

eration. The flexible board is easily damaged and should be handled

with care.

OPTICAL PICK-UP FLEXIBLE BOARD

SECTION 1

SERVICING NOTE

laser-tap

• In performing the repair with the power supplied to the set,

removing the MAIN board causes the set to be disabled.

In such a case, fix a convex part of the open/close detect switch

(S806 on MAIN board) with a tape in advance.

Handle the FLEXIBLE board (over write head) with care, as it

has been soldered directly to the MAIN board.

In repairing the component side of MAIN board, connect the

FLEXIBLE board (over write head) and the MAIN board with

the lead wires in advance. (See page 8)

FLEXIBLE board

(Over write head)

Tape

S806

MAIN board

• Replacement of CXD2674-204GA (IC801) used in this set

requires a special tool.

• On the set having the microcomputer version 1.000, some

adjusted values were set in the manual mode at the shipment,

but these data will be cleared when the NV is reset. Therefore,

on the set having the microcomputer version 1.000, change the

adjusted values following the Change of Adjusted Values

immediately after the NV was reset. (See page 18)

upper panel assy