Section 4: Circuit Adjustments; Electrical Adjustments By Remote Commander; Setting The Service Adjustment Mode; Memory Write Confirmation Method - Sony TRINITRON KV-20S90 Service Manual

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
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
SERVICE ADJUSTMENT MODE ON
1. The CRT displays the item being adjusted.
Display
Mode
Item
HSIZ
SERVICE
2. Press 1 or 4 on the Remote Commander to select the item.
3. Press 3 or 6 on the Remote Commander to change the data.
4. Press MUTING then ENTER to write into memory.
SERVICE ADJUSTMENT MODE MEMORY
Mode
WRITE
SERVICE
1. Press 8 then ENTER on the Remote Commander to initialize.
Mode
SERVICE RESET
2. Turn set off then on to exit service adjustment mode.

SECTION 4: CIRCUIT ADJUSTMENTS

Sound Volumne + Power
Item
Data
0
MUTING
Green
ENTER
Red
Carry out Step 1 when adjusting
IDs 0-7 and when replacing and
adjusting IC003
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)
— 16 —
KV-20S90 / 21SE43C
POWER
(Service Mode)
3
Item (Data up)
6
Item (Data down)
5
(Device item down)
ENTER
(Enter into
memory)
0
(Remove from
memory)
RM-Y155