User's Manual

October 14, 2003 6881094C31-C
4-4 Troubleshooting Procedures: Standard Bias Table
4.4 Standard Bias Table
Table 4-2 outlines some standard supply voltages and system clocks which should be present under
normal operation. These should be checked as a first step to any troubleshooting procedure.
Table 4-2. Standard Operating Bias
Signal Name Nominal Value Tolerance VOCON Board Source
13 MHz 13 MHz ±1000 ppm C303 (NTN9564)
C339 (NNTN4563, NNTN4819 &
NNTN4717)
FLIP_32K 32.768 kHz ±400 ppm U302, pin2
(under shield SH102
on NNTN4563, NNTN4819 &
NNTN4717)
SINE32K 32.768 kHz ±400 ppm C313 (NTN9564)
C306 (NNTN4563, NNTN4819 &
NNTN4717)
CKIH 16.8 MHz R452
(under shield SH101 on NNTN4563,
NNTN4819 & NNTN4717 or
test fixture pin 7 on the
board-to-board connector)
16_8MHz 16.8 MHz C452
(under shield SH101
on NNTN4563, NNTN4819 &
NNTN4717)
POR 3.0 Vdc ±5% POR test point
RESET_OUT 3.0 Vdc ±5% RESET_OUT test point (NTN9564)
D401, pin 3 (NNTN4563, NNTN4819 &
NNTN4717)
VSW1 3.85 Vdc ±5% R502
VSW2 1.85 Vdc ±5% R501
FILT_B+ 7.5 Vdc 6.0-9.0 Vdc C523
V2 3.0 Vdc*
2.9 Vdc**
±5% R560
GCAP_B+ 7.5 Vdc 6.0-9.0 Vdc R581
UNSW_B+ 7.5 Vdc 6.0-9.0 Vdc B104
SW_B+ 7.5 Vdc 6.0-9.0 Vdc R587
VCC5 5.0 Vdc ±5% R503
VSW_1_55 V 1.55 Vdc ±5% R407 (NNTN4717 VOCON kit only)
* = NTN9564, NNTN4563, & NNTN4819 VOCON kits
** = NNTN4717 VOCON kit