Loewe 67501 D 00, Руководство по обслуживанию

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67501 T/D 00
2 – 10
The LCD display does not light up.
Check if there is a crack or damage in the LCD unit. Replace LCD1101.
Check the pattern between IC1101 and LCD1101.
Is SEG or COM signal of the position to display input into
LCD1101?
NO
YES
YES
YES
Is signal output from pins (1)-(17) and (33)-(35) of IC1101?
Is 5V input into pin (37), LCD_RST into pin (36), LCD_CS into
pin (42), LCD_CLK into pin (43) and LCD_DATA into pin (44)
of IC1101?
Replace LCD1101.
YES
Check the periphery of IC1101 or replace IC1101.
NO
NO
Is 5V input into pin (8), LCD_CS into pin (11), LCD_DATA into
pin (18), LCD_CLK into pin (9) and LCD_RST into pin (12) of
SC1101?
YES
Check each signal line between CN1101 and IC1101.
NO
Is 5V output from pin (14), LCD_CS from pin (11), LCD_DATA
from pin (13), LCD_CLK from pin (12) and LCD_RST from pin
(10) of CN2502?
YES
Check the contact between CN2502 and CN1101.
NO
Is 5V supplied to pin (14) of CN2502?
NO
Check the ST_5V line.
NO
Is LCD_CS supplied to pin (11), LCD_DATA to pin (13),
LCD_CLK to pin (12), LCD_RST to pin (10) of CN2502?
NO
Check the following supplies:
LCD_DATA from pin (1) of IC2504 to pin (13) of CN2502
LCD_CLK from pin (2) of IC2504 to pin (12) of CN2502
LCD_RST from pin (3) of IC2504 to pin (10) of CN2502
LCD_CS from pin (47) of IC2504 to pin (11) of CN2502
Check the peripheral circuits of IC2504.
YES
FLOW CHART No.2
Key operation does not work.
Are the contact and assembly condition of the key switch
normal?
Check or replace the corresponding switch.
Is control voltage correctly input into pins (74) and (75) of
IC2504?
YES
NO
NO
Check or replace the peripheral circuits of IC2504.
Check the circuits that regulates each control voltage.
YES
FLOW CHART No.3