Allen&Heath GR1 SERVICE MANUAL - Manual (Page 29)

ALLEN & HEATH Section C - 2
R1SM1
TECHNICAL BULLETIN
Page: Date: Issue No.
Authorised:
Attention Service Departments
of:
File with GR1 Service Manual
Title:
REF. GR1_01 1 25-11-94
I Mc B ISSUE 3 PCB MODIFICATIONS
The following applies to all GR1 units with Issue 3 PCBs (AG2041 Issue 3).
1) GR1 PCB Issue 3
The issue 3 version of the GR1 PCB (AG2041 Issue 3) has a number of minor modifications.
These are:
i: SYS-LINK OUT L and M are swopped. This is corrected by crossing over two resistors
R643 and R645.
ii: The meter PCB is too far back from the front panel. This is corrected by spacing the
PCB 1.6mm forward on the connector pins.
iii: The MONO and PHONES level controls are too far back from the front panel. This
is corrected by placing washers over the control shafts.
iv: The text legend on link J22 is in the wrong position. The text should be moved one
position to the right.
1 2 3 1 2 3
is should be
All of these errors have been corrected for the issue 4 version of the PCB.
1 1