Arcam FMJ P7 Service Manual page 13

Inputs
SK103
PHONO2G
1
TP100
F PL100
1
2
EMC
N
2WVERTJUMPER
C104
R104
1N0 SM
100R SM
TP101
0V_SIG
Z100 Z102 Z106 Z107 Z108 Z109
TRANSISTOR
PCB HEATSINK M3 TAPTITE M3 TAPTITE M3 TAPTITE
INSULATOR
L924PB E915HK E950MC HB3B12A HB3B12A HB3B12A
Z101 Z103 Z104 Z105
SUB PANEL SUB PANEL SUB PANEL SUB PANEL
SCREW SCREW SCREW
E107AY HF4V09B HF4V09B HF4V09B
To microprocessor PCB
SK104
10WAY-H-0.1-F
Microprocessor GND
Microprocessor +24V
NB: Signals THERMPROT, VIPROT, MUTE not used
DCPROT and FAULT are open Output relay control
collector outputs, active low, Not used
referenced to 0V_DIG with no pull up Thermal protection
resistors SOA protection
DC offset protection
Overall fault signal
Not used
L924C2 L924C3
L924C2_1.1.sch L924C3_1.1.sch
INPUT EMITTER1 EMITTER1
EMITTER2 EMITTER2
BASE1 OUTPUT OUTPUT
BASE2
NFB
Amplifier circuit Protection and supplies
Z110
M3 TAPTITE
HB3B12A
NB: Nets +24V_DIG and 0V_DIG are isolated from amplifier circuit
+24V DIG
+24V_DIG
TP102
1
TP103
2 0V_DIG
3 MUTE TP104 C103
4 OUT RLY TP105 100N SM
5
6 THERMPROT TP106 RLY101B
7 VIPROT TP107
RLY G2R-1E-24DC 16A SPDT
8 DCPROT TP108
9 FAULT TP109
10
OUT RLY
VIPROT
VIPROT
DCPROT
DC
THERMPROT
THERM
FAULT
FAULT
BASE1
BASE2
R103
RLY101A
2R2 MF
RLY G2R-1E-24DC 16A SPDT
TP110
L101
2U2 AIR CORED
NB: Feedback around relay not fitted
DRAWING TITLE
A & R Cambridge Ltd.
Pembroke Avenue
Waterbeach
Cambridge CB5 9PB
D101
BAS16W SM
Electrical ground star point
0V_SIG
SP101
STAR_8
0V_HF
0V_ZOB 0V_LS
0V_PSU
TP111
SK105
4MM 2W HOR
TP112
0V_LS
P7 Amplifier Module
Filename: L924C1 1.1.sch
Notes:
02_E055 JR
ECO No. INITIALS
Contact Engineer: Jonny Reckless Contact Tel: (01223) 203200 Printed:
4/3/2002 FIXED DC FAULT AT POWER ON SEQUENCE BY FEEDBACK 1.1
DATE DESCRIPTION OF CHANGE ISSUE
L924CT
7 Mar 2002 Sheet 1 of 3 DRAWING NO.