TRACE ELLIOT GP12 SMX SERIES User manual

TRACE ELLIOT
SERVICE MANUAL
DATE : December 29, 1999
Product Code: N/A
Model Number : GP12 300 WATT SMX SERIES
This unit has used two issues of 300 watt MOSFET power board.
The Bi-polar Bear and the 300 Mosfet Board
Details for both are included in this manual.
You should check which board you have in your unit before
attempting any repair.
The Bi-polar board is marked PC00026
The MOSFET board is marked PC00083
Issued by:
Trace Elliot Limited
Blackwater Trading Estate
The Causeway
Maldon
Essex
England
CM4 4GG

PARTS LIST FOR GP12SM FRONT BOARD
Description Part Code Qty Where Used
RESISTORS
15K ¼ WATT 72-RM15K 2R169 R170
1K ¼ WATT 72-RM1K 2R174 R176
1K3 ¼ WATT 72-RM1K3 1R172
1K5 ½ WATT 72-RM1K5-.5W 1R173
4K7 ¼ WATT 72-RM4K7 1R171
6K8 ¼ WATT 72-RM6K8 1R168
430R 2.5 WATT 72-RWW430R-2.5W 2R175 R177
CAPACITORS
10µF 35V AXIAL 72-C10-35VEA 1C118
SEMI-CONDUCTORS
GREEN LED 72-LED-GRN-REC 1G
RED LED 72-LED-RED-TEG 1O
YELLOW LED 72-LED-YEL-REC 1Y
BC549C TRANSISTOR 72-TBC549C 5TR24-28
OTHERS
BULB 73-FLUOR-TUBE 2A
SLIDER 73-SLIDER-B100KC 12 SL1-12
10 WAY LINK 72-LK-10W150TEG 2 2
PLASTIC SPACER 71-SPA-LED-TEG2 3G,O,Y
Rik Daniels
February 24, 1997

PARTS LIST FOR GP12SM MAIN PCB
Description Part Code Qty Where Used
RESISTORS
3M9 ¼ Watt 72-RM3M9 3R1 R3 R5
47K ¼ Watt 72-RM47K 11 R15 R17 R51 R55 R61
R64 R65 R68 R122
R123 R143
10K ¼ Watt 72-RM10K 23 R4 R8 R12 R20 R32
R33 R40 R41 R43 R48
R49 R53 R57 R60 R63
R67 R116 R124 R125
R126 R129 R133 R138
1K ¼ Watt 72-RM1K 7R6 R7 R26 R34 R141
R145 R153
4K7 ¼ Watt 72-RM4K7 44 R9 R28 R31 R36 R39
R80-115 R146 R163
R165
100K ¼ Watt 72-RM100K 13 R10 R11 R69 R70 R71
R73 R75 R76 R120
R157 R158 R162 R19
220K ¼ Watt 72-RM220K 9R13 R14 R16 R21 R77
R127 R131 R135 R2
22K ¼ Watt 72-RM22K 10 R18 R59 R119 R142
R151 R152 R154 R155
R160 R161
3K3 ¼ Watt 72-RM3K3 1R23
3K8 ¼ Watt 72-RM3K8 8R30 R38 R44 R52 R56
R58 R79 R167
1M ¼ Watt 72-RM1M 5R24 R25 R27 R35 R50
15K ¼ Watt 72-RM15K 2R42 R66
33K ¼ Watt 72-RM33K 14 R45 R46 R117 R121
R128 R132 R139 R144
R148 R149 R150 R164
R166 R147
56K ¼ Watt 72-RM56K 2R72 R74
2M2 ¼ Watt 72-RM2M2 2R118 R140
180K ¼ Watt 72-RM180K 2R156 R159
15R ¼ Watt 72-RM15R 1R22
470R 1 Watt 72-RM470R-1WATT 2R29 R37
220R ¼ Watt 72-RM220R 6R54 R62 R130 R134
R136 R137
560R ¼ Watt 72-RM560R 1R78
3K9 ¼ Watt 72-RM3K9 1R47
LINKS 72-RCZERO 56
CAPACITORS

PARTS LIST FOR PC00021
AH 250 REAR PCB
Description Part Code Qty Where Used
RESISTORS
ZERO OHM LINK 72-RC-ZERO 3
10K ¼ WATT 72-RM10K 6R3 R4 R5 R6 R10 R11
560R ¼ WATT 72-RM560R 2R12 R13
22K ¼ WATT 72-RM22K 1R9
33K ¼ WATT 72-RM33K 1R7
100K ¼ WATT 72-RM100K 3R1 R2 R8
CAPACITORS
10µF 63V RADIAL 72-C10-63VER 2C1 C2
1µF 100V POLY BOX 72-C1-100VP 2C3 C4
SEMI-CONDUCTORS
J112 TRANSISTOR 72-FET-J-112 1TR1
4558 OP-AMP 72-IC-RC4558P 1IC1
SOCKETS
MONO JACK SOCKET 73-SKT-JCKBNBG 3SK2 SK3 SK4
MALE XLR 73-XLR-PCB-M 1SK5
STEREO JACK SOCKET 73-SKT-JCKBBBG 1SK1
3 WAY HEADER 72-HEAD-3W-2 1PL3
10 WAY LINK 72-LK-6W300TEG 1PL4
3 WAY SOCKET 72-SKT-IDC-3W 1PL3
2 WAY HEADER 72-HEAD-2W 1PL2
SWITCHES / POTS
PUSH SWITCH 72-SW-F2UEE 1SW1
B50K POT 73-POT-50KB 1RV1
Rik Daniels
February 21, 1997

Important Notice
To make the bi-polar 300 watt bass board reliable the following guidelines
must be adhered to.
When a board need to be serviced it is advisable to replace both the Output
Transistors and TIP31 and TIP32. Also it is advisable to replace TR11 which
is situated under the rear of the heatsink.
The Output device should only be T2SC4468 and T2SA1695’s
The Drivers should be of the same manufacturer as each other to ensure
stability.
And TR11 is a T2N3904 as listed on the parts list.
TR11 need to be completely covered in Heat Transfer Compound (HTC)
This is to ensure that it keeps the unit biased correctly even when the unit
gets hot. If TR11 is not covered then the fan can cool this component down
and give the board a fault reading of temperature and provide and
inappropriate bias.
When adjusting the bias on the scope, make sure that the crossover distortion
is just not visible. Too far beyond this point will over bias the unit.
Use a Shake-proof washer under the pcb earth point to ensure a permanent
connection and prevent crackling noises in the future.
Paul Mathews
Jan 2000-01-25

cd0086x4.sch-1 - Sat Dec 11 11:04:47 1999