Sharp Vodafone 802SH, Руководство по обслуживанию

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802SH
2 – 34
CONFIDENTIAL
(From page 2-33)
Does Error occur when the command VERS =
1 is entered? (*1) The file system or SRAM is defective.
Use the wire method for measurement.
In the test mode, can synchronisation be estab-
lished with a simulator, etc.? (ANT terminal
input: -90 dBm)
Use the PUCA command. (*2)
In mandatory reception mode (*3), is MCLK
output sent correctly? VCXO circuit or IC400 is defective.
In mandatory reception mode (*3), is the RSSI
value normal? Are the appropriate signals for SP015, SP016,
SP017, and SP018 displayed on an oscillo-
scope? FL001 and IC400 or
PWB are defective.
IC1400 or PWB is defective. IC1400 or PWB is defective.
*1: The command input procedure will be described later.
*2: Check both “Yes” and “No” items when the PUCA command is not available due to the lack of a simulator (such as MT8820A made by Anritsu)
or other necessary devices.
*3: The command input procedure will be described later.
[Transmission system]
Use the PUCA command. (*2)
Are the appropriate signals for SP001, SP002,
SP003, and SP004 displayed on an oscillo-
scope? IC1400 is defective.
Is the transmission frequency correct? Is the voltage approx. 1 V on both ends of
C710? IC400 is defective.
Is the transmission waveform normal?
(At maximum output, ACLR
±
5 MHz is –34 dBc
or less, occupied bandwidth is 4.3 MHz or less,
and modulation accuracy is 12% or less.)
IC700 is defective.
Is the output level is correct?
(21 to 25 dBm, at maximum output) At maximum output, is the voltage on IC630 pin
1 acceptable (approx. 2.6 V)? IC630 or IC1200 is
defective.
The aerial circuit and parts are defective. At maximum output, is the voltage 3 V or more
on both ends of C627? IC630 or IC620 is
defective.
FL001 and IC700 or PWB are defective.
C
YES
NO
YES
D
NO
NO
YES
NO NO
YES YES
D
NO
YES
NO YES
YES NO
NO
YES
NO NO
YES YES
NO
YES