Page 7
- MOTOROLA CONFIDENTIAL PROPRIETARY -
GSM Krunch - Level 3 Procedure vers.1.1
03/05/1999
4
Check U704 and NOTE 1.
If there isn' t L275 voltage send
the PCB to HTC
no
yes
Is CE
signalling(one
clk cycle
1/13MHz=77nS)
present at TP11
U702
Falshprom?
(see page 32)
Check U702 and NOTE 1.
If there isn' t L275 voltage send
the PCB to HTC
Micro DCA or U702 problem.
If there isn' t L275 voltage send
the PCB to HTC
Are the signal below present at U705 EEPROM?
1) pin 7 L275 opereting voltage
2)pin 27 CE (active low) see page 33
3) pin 6 WR (active low)
4) pin 1 OE ( active low)
5) Access time 300nS
Is CE
signalling
present at
U703 BIC
pin 19?
yes
yes
no
no
Is DATA BUS
D0:D15 logic
signalling
correct?
( e.i. Quick check
at U705
EEPROM pin 26
D15, see page
33)
You can usually have twice problems:
1) BUS Conflict ( when two peripheral stay in low
impedence in the same time)
2) The wrong Falling Edge transition CMOS level
(See the example in attached on page 21-22)
3) Check the J101display connector for any short circuit.
yes
no
5
Summary of Contents for StarTAC130
Page 1: ...StarTAC130 GSM The World s Leading Cellular Telephone Manufacturer Service Manual ...
Page 2: ...GSM StarTAC130 PERSONAL CELLULAR TELEPHONE Service Manual Ver 1 0 ...
Page 9: ...Service Manual 2 2 3 99 StarTAC130 CELLULAR TELEPHONE PAGE INTENTIONALLY BLANK ...
Page 11: ...Service Manual 4 2 3 99 StarTAC130 CELLULAR TELEPHONE PAGE INTENTIONALLY BLANK ...
Page 13: ...Service Manual 6 2 3 99 StarTAC130 CELLULAR TELEPHONE PAGE INTENTIONALLY BLANK ...
Page 25: ...Service Manual 18 2 3 99 StarTAC130 CELLULAR TELEPHONE 2 1 3 4 5 6 7 8 9 10 11 ...
Page 27: ...Service Manual 20 2 3 99 StarTAC130 CELLULAR TELEPHONE PAGE INTENTIONALLY BLANK ...
Page 60: ...Page 31 MOTOROLA CONFIDENTIAL PROPRIETARY GSM Krunch Level 3 Procedure vers 1 1 03 05 1999 ...
Page 69: ...Page 40 MOTOROLA CONFIDENTIAL PROPRIETARY GSM Krunch Level 3 Procedure vers 1 1 03 05 1999 ...
Page 70: ...Page 41 MOTOROLA CONFIDENTIAL PROPRIETARY GSM Krunch Level 3 Procedure vers 1 1 03 05 1999 ...
Page 71: ...Page 42 MOTOROLA CONFIDENTIAL PROPRIETARY GSM Krunch Level 3 Procedure vers 1 1 03 05 1999 ...
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