Sony MZ-R90 Analog PCLink Service Manual - Page 11

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Sony MZ-R90 Analog PCLink Service Manual

[Outline]

• This set provides the Overall adjustment mode (Assy mode) that

allows CD and MO disc to be automatically adjusted when in

the test mode. In this overall adjustment mode, the protect switch

is detected to judge the disc, CD or MO, and each adjustment is

automatically executed in order. If a fault is found, the system

displays its location. Also, the manual mode allows each indi-

vidual adjustment to be automatically adjusted.

• The keys in the description refer to the keys on both set and

remote commander unless otherwise specified. Though LCD

display shows the LCD of the remote commander, same con-

tents are also displayed on the LCD of the set.

[Setting Method of Test Mode]

There are two different methods to set the test mode:

1 Short BP801 (TEST) on the MAIN board with a solder bridge

(connect pin y; of IC801 to the ground). Then, turn on the

power.

– MAIN BOARD (Conductor Side) –

BP801

Short: Test Mode

(

Open: Normal Mode

SECTION 4

TEST MODE

)

2 In the normal mode, turn on the HOLD switch on the set. While

pressing the

in the following order:

[Operation in Setting the Test Mode]

• When the test mode becomes active, first the display check mode

is selected. (Press

is not active.)

• Other mode can be selected from the display check mode.

• When the test mode is set, the LCD repeats the following dis-

play.

LCD display

xxxxxxxxx

All lit

888

All off

Microprocessor

version

001

display

• When the

key is pressed and hold down, the display at that

time is held so that display can be checked.

[Releasing the Test Mode]

For test mode set with the method 1:

Turn off the power and open the solder bridge on BP801 (TEST)

on the MAIN board.

Note: Remove the solders completely. Remaining could be shorted with

the chassis, etc.

For test mode set with the method 2:

Turn off the power.

Note: If electrical adjustment (see page 18) has not been finished com-

pletely, always start in the test mode. (The set cannot start in nor-

mal mode.)

– 11 –

key on the set, press the following set keys

key once, when the display check mode

V0.000

F1SHUF

REC