--- a/content/hp8904a.rst Thu Nov 05 22:14:33 2020 +0100
+++ b/content/hp8904a.rst Thu Nov 05 22:15:16 2020 +0100
@@ -16,7 +16,7 @@
generating a non-symmetric signal when output level was set above 5V
or something like that.
-.. image:: {static}images/hp8904a/twin_HP8904A.jpg
+.. image:: {static}/images/hp8904a/twin_HP8904A.jpg
:alt: My 2 HP8904A synthetizers.
I knew for a fact that the PSU was the problem (thanks to the fact I
@@ -32,9 +32,9 @@
The PSU Problem
===============
-.. image:: {static}images/hp8904a/hp8904a_top.jpg
+.. image:: {static}/images/hp8904a/hp8904a_top.jpg
:alt: Top view of the HP8904A
-
+
The PSU board is the one at the rear of the unit, on the upper part of
the case (the lower part hold the analogic boards). The PSU is not a
custom HP board, but is a Computer Products switchmode supply (90
@@ -73,15 +73,15 @@
sink and split these two boards apart, since it's not easy to deal
with this:
-.. image:: {static}images/hp8904a/hp8904_psu_followme.jpg
+.. image:: {static}/images/hp8904a/hp8904_psu_followme.jpg
:alt: part of the +16.3V PSU rail
-
+
So I removed the heatsink and disassembled this small board from the
main one (which was quite painful, since I don't have a disoldering
station. Disassembling the 3x 8 pins angle connectors from the double
sided PCB was not a piece of cake...)
-.. image:: {static}images/hp8904a/HP8904A_daughter_board.jpg
+.. image:: {static}/images/hp8904a/HP8904A_daughter_board.jpg
:alt: the small daughter board of the PSU
After that, I noticed a possible leak of a small cap, but this was on
@@ -98,7 +98,7 @@
The part of the schematic involved in the +16.3V rail is the following:
-.. image:: {static}images/hp8904a/psu_schematic.png
+.. image:: {static}/images/hp8904a/psu_schematic.png
:alt: part of the schemtic of the PSU
At first glance (the schematic was then a bunch of poorly made
@@ -164,13 +164,13 @@
f2, F, F, f4, f4
Power-Cycle
-That is: write the value 0xFF at address 0x3FFC.
+That is: write the value 0xFF at address 0x3FFC.
The procedure to restore the serial number can be found in the service
manual of the HP8904.
And in case of failed battery, the memory can be restored following
-`this document <{static}pdfs/HP_8904A_Service_Notes_2.pdf>`_
+`this document <{static}/pdfs/HP_8904A_Service_Notes_2.pdf>`_
.. _`thread pointing to an HP service document`: http://www.eevblog.com/forum/testgear/hp-8904a-options/
