User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 69
Issue 1 06/01
2.19.4 PHF Speaker faulty
PHF Spealer
Check assembly of HF speaker,
faulty
Connection
Check VAMP at
R201, R204, R205, R221
VAMP
NO
OK
OK
NO
Voltages OK?
Amplifier enabled?
Voltage low?
NO
NO
OK
OK?
about VBATT ?
AMP SHDN at V200 pin 2
springs and connection to flex UL8
Check connections from
speaker pads to C236 and C237
2.8 V during a PHF call ?
Faulty
V200
Check voltage at N201 pin 1
Faulty
D300 (MAD)
OK
Continues next page
Check R201, R204, R205,
Check Flex UL8 and
B–to–B conn X400
pins 43 to 46
(Note: R201, R221 only in BL8_18)
C203, C204, C205, C206
Note:
R204 and R205 havedifferent resistance
values in BL8_17
and BL8_18
*
*
*
R221
Figure 57.