2.15 Sound Troubleshooting 2 Troubleshooting Procedures
TECRA 9100 Maintenance Manual (960-347) 2-57
Procedure 2 Connector Check
The sound function wiring diagram is shown below:
Internal
Microphone
Sound Board
PJ1003 PJ1000
PJ1004
PJ103
I/O Board
PJ129
PJ102
Speaker
External
Microphone
IS BoardPJ2 PJ1
IC BoardPJ103 PJ2
PJ1001
Headphone
PJ1005
PJ127
Any of the connections may be disconnected. Disassemble the computer following the steps
described in Chapter 4, Replacement Procedures and perform the following checks:
If the stereo speakers do not work correctly, perform Check 1.
If headphones do not work correctly, perform Check 2.
If sound recording does not work correctly, perform Check 3.
Check 1 If the stereo speakers do not work properly, the speaker cables may be
disconnected. Make sure the speaker cables are firmly connected to PJ127 on the
I/O board. If the stereo speakers are still not functioning properly, go to Procedure
3.
Check 2 If headphones do not work properly, the sound board may be disconnected or
damaged. Make sure connector PJ1000 and 1001 on the sound board is firmly
connected to the I/O board. If the sound function still does not work properly,
replace it with a new one. Go to Procedure 3.
Check 3 If the sound recording function does not work properly, the Internal microphone
cable may be disconnected. Make sure the microphone cable is firmly connected
to PJ1003 on the sound board. If recording is still not functioning properly, go to
Procedure 3.
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