Sony TRINITRON KV-20S90, RM-Y155 Service Manual

Self Diagnosis

Supported model

SERVICE MANUAL

MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO.

KV-20S90

RM-Y155 US SCC-S27NA

BA-4D

CHASSIS

Trinitron

KV-20S90

RM-Y155

TRINITRON® COLOR TELEVISION

9-965-905-01

SECTION 4: CIRCUIT ADJUSTMENTS

ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER

Use the Remote Commander (RM-Y155) to perform the circuit adjustments in this section.

Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator

KV-20S90 / 21SE43C

4-1. SETTING THE SERVICE ADJUSTMENT
MODE

1. Standby mode (Power off).

2. Press the following buttons on the remote commander within a
second of each other:

Display

Channel 5 Sound Volumne + Power

SERVICE ADJUSTMENT MODE ON

1. The CRT displays the item being adjusted.

Item

Data

0

to write into memory.

2. Press

3. Press

4. Press

then

Display

Item

HSIZ

ENTER

Mode

SERVICE

1

or 4 on the Remote Commander to select the item.

3

or 6 on the Remote Commander to change the data.

MUTING

SERVICE ADJUSTMENT MODE MEMORY

Mode

1. Press

SERVICE

8

then

ENTER

MUTING

WRITE

ENTER

on the Remote Commander to initialize.

Green

Red

4-2. MEMORY WRITE CONFIRMATION
METHOD

1. After adjustment, pull out the plug from the AC outlet, then replace
the plug in the AC outlet again.

2. Turn the power switch ON and set to Service Mode.

3. Call the adjusted items again to confi rm they were adjusted.

4-3. REMOTE ADJUSTMENT BUTTONS AND
INDICATORS

MUTING

(Enter into
memory)

DISPLAY

(Service Mode)

1

Disp. (Item up)

2

(Device Item Up)

4

Disp. (Item down)

8

(Initialize)

VOLUME (+)

(Service Mode)

POWER

(Service Mode)

3

Item (Data up)

6

Item (Data down)

5

(Device item down)

ENTER

(Enter into
memory)

0
(Remove from
memory)

Mode

SERVICE RESET

2. Turn set off then on to exit service adjustment mode.

Carry out Step 1 when adjusting
IDs 0-7 and when replacing and
adjusting IC003

RM-Y155

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