- Joined
- Oct 19, 2008
- Posts
- 867
hi
so my lovely 1fz from time to time throws me this errors :
or
read 8655 / 8455 / 8255
i've triple checked the RAM 3 / RAM 4 pinout
everything is ok , from the errors the issue should be on the RAM4 (i think), or maybe on the two backup ram IC's ?
this one really is driving me nuts , sometimes the board boots fine without issues
... and sometime like on this whole weekend is always stuck on this backup ram errors.
Funny is that even with the new battery (battery mod, using a new cr one), it never saved nothing, even the date/time
but that never really bothered me...
for reference the board haves the +5v mod only+ stereo mod
Feedback is very welcome.. dunno what should i check next ...
thanks
so my lovely 1fz from time to time throws me this errors :
Code:
backup ram error
Address 00D00000
write 5555
read 8055
or
read 8655 / 8455 / 8255
i've triple checked the RAM 3 / RAM 4 pinout
Code:
RAM3
1 RAM4 (1), RAM1 (1), RAM2 (1), CPU1 (46), GU5 (33), SP1 (36), CN2 (24A)
2 RAM4 (2), RAM1 (2), RAM2 (2), CPU1 (44), GU5 (31), SP1 (34), CN2 (22A)
3 RAM4 (3), RAM1 (3), RAM2 (3), CPU1 (39), GU5 (17), SP1 (28), CN2 (17A)
4 RAM4 (4), RAM1 (4), RAM2 (4), CPU1 (38), GU5 (16), SP1 (27), CN2 (16A)
5 RAM4 (5), RAM1 (5), RAM2 (5), CPU1 (37), GU5 (15), SP1 (26), CN2 (15A)
6 RAM4 (6), RAM1 (6), RAM2 (6), CPU1 (36), GU5 (4), SP1 (25), CN2 (14A)
7 RAM4 (7), RAM1 (7), RAM2 (7), CPU1 (35), GU5 (3), SP1 (24), CN2 (13A)
8 RAM4 (8), RAM1 (8), RAM2 (8), CPU1 (34), GU5 (2), SP1 (23), CN2 (12A)
9 RAM4 (9), RAM1 (9), RAM2 (9), CPU1 (33), GU5 (1), SP1 (22), CN2 (11A)
10 RAM4 (10), RAM1 (10), RAM2 (10), CPU1 (32), GU5 (64), SP1 (21), CN2 (10A)
11 RAM2 (11), SP1 (19), CPU1 (5), U8 (18), GU7 (6)
12 RAM2 (12), SP1 (18), CPU1 (4), U8 (17), GU7 (7)
13 RAM2 (13), SP1 (17), CPU1 (3), U8 (16), GU7 (8)
14 GND
15 RAM2 (15), SP1 (16), CPU1 (2), U8 (15), GU7 (9)
16 RAM2 (16), SP1 (15), CPU1 (1), U8 (14), GU7 (11)
17 RAM2 (17), SP1 (14), CPU1 (68), U8 (13), GU7 (12)
18 RAM2 (18), SP1 (13), CPU1 (67), U8 (12), GU7 (13)
19 RAM2 (19), SP1 (12), CPU1 (66), U8 (11), GU7 (14)
20 U17 (2), Q1 (collector)
21 RAM4 (21), RAM1 (21), RAM2 (21), CPU1 (42), GU5 (20), SP1 (32), CN2 (20A)
22 GU1 (97)
23 RAM4 (23), RAM1 (23), RAM2 (23), CPU1 (43), GU5 (21), SP1 (33), CN2 (21A)
24 RAM4 (24), RAM1 (24), RAM2 (24), CPU1 (41), GU5 (19), SP1 (31), CN2 (19A)
25 RAM4 (25), RAM1 (25), RAM2 (25), CPU1 (40), GU5 (18), SP1 (29), CN2 (18A)
26 RAM4 (26), RAM1 (26), RAM2 (26), CPU1 (45), GU5 (32), SP1 (35), CN2 (23A)
27 U17 (8)
28 VCC
RAM4
1 RAM3 (1), RAM1 (1), RAM2 (1), CPU1 (46), GU5 (33), SP1 (36), CN2 (24A)
2 RAM3 (2), RAM1 (2), RAM2 (2), CPU1 (44), GU5 (31), SP1 (34), CN2 (22A)
3 RAM3 (3), RAM1 (3), RAM2 (3), CPU1 (39), GU5 (17), SP1 (28), CN2 (17A)
4 RAM3 (4), RAM1 (4), RAM2 (4), CPU1 (38), GU5 (16), SP1 (27), CN2 (16A)
5 RAM3 (5), RAM1 (5), RAM2 (5), CPU1 (37), GU5 (15), SP1 (26), CN2 (15A)
6 RAM3 (6), RAM1 (6), RAM2 (6), CPU1 (36), GU5 (4), SP1 (25), CN2 (14A)
7 RAM3 (7), RAM1 (7), RAM2 (7), CPU1 (35), GU5 (3), SP1 (24), CN2 (13A)
8 RAM3 (8), RAM1 (8), RAM2 (8), CPU1 (34), GU5 (2), SP1 (23), CN2 (12A)
9 RAM3 (9), RAM1 (9), RAM2 (9), CPU1 (33), GU5 (1), SP1 (22), CN2 (11A)
10 RAM3 (10), RAM1 (10), RAM2 (10), CPU1 (32), GU5 (64), SP1 (21), CN2 (10A)
11 RAM1 (11), CPU1 (65), SP1 (10), GU2 (13), CN2 (14B)
12 RAM1 (12), CPU1 (64), SP1 (9), GU2 (14), CN2 (15B)
13 RAM1 (13), CPU1 (63), SP1 (8), GU2 (15), CN2 (16B)
14 GND
15 RAM1 (15), CPU1 (62), SP1 (7), GU2 (16), CN2 (17B)
16 RAM1 (16), CPU1 (61), SP1 (6), GU2 (18), CN2 (18B)
17 RAM1 (17), CPU1 (60), SP1 (5), GU2 (19), CN2 (19B)
18 RAM1 (18), CPU1 (59), SP1 (4), GU2 (20), CN2 (20B)
19 RAM1 (19), CPU1 (58), SP1 (3), GU2 (21), CN2 (21B)
20 U17 (2), Q1 (collector)
21 RAM1 (21), RAM3 (21), RAM4 (21), CPU1 (42), GU5 (20), SP1 (32), CN2 (20A)
22 GU1 (13)
23 RAM3 (23), RAM1 (23), RAM2 (23), CPU1 (43), GU5 (21), SP1 (33), CN2 (21A)
24 RAM3 (24), RAM1 (24), RAM2 (24), CPU1 (41), GU5 (19), SP1 (31), CN2 (19A)
25 RAM3 (25), RAM1 (25), RAM2 (25), CPU1 (40), GU5 (18), SP1 (29), CN2 (18A)
26 RAM3 (26), RAM1 (26), RAM2 (26), CPU1 (45), GU5 (32), SP1 (35), CN2 (23A)
27 U17 (6)
28 VCC
everything is ok , from the errors the issue should be on the RAM4 (i think), or maybe on the two backup ram IC's ?
this one really is driving me nuts , sometimes the board boots fine without issues
... and sometime like on this whole weekend is always stuck on this backup ram errors.
Funny is that even with the new battery (battery mod, using a new cr one), it never saved nothing, even the date/time
but that never really bothered me...
for reference the board haves the +5v mod only+ stereo mod
Feedback is very welcome.. dunno what should i check next ...
thanks
Last edited: