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EL Series
(including EL302Tv)
Power Supplies
Service Manual
Manual Part Number 48511-0380 Issue 2
Applicability
This Service Manual covers models EL301, EL302, EL183, EL561, EL302D, EL302T and EL302Tv from
their introduction to the present.
Models EL303 and EL155 are covered by a separate manual 48511-0920.
Table of Contents
Specification 2
Safety 4
EMC 5
Installation 6
General 7
Circuit Descriptions 9
Calibration 11
Parts List 13
Component Layouts & Circuit Diagrams 35
1
Specification
MAIN OUTPUTS
Voltage Range: 0V to 18V minimum (EL183)
0V to 30V minimum (EL301, EL302, EL302D, EL302T, EL302Tv)
0 to 56V minimum (EL561)
Current Range: 0A to 1A minimum (EL301)
0A to 1.1A minimum (EL561)
0A to 2A minimum (EL302, EL302D, EL302T, EL302Tv)
0A to 3.3A minimum (EL183)
Voltage Setting: By coarse and fine controls.
Current Setting: By single logarithmic control.
Operating Mode: Constant voltage or constant current with automatic cross-over.
Output Switch: Electronic. Preset voltage and current displayed when off.
Output Terminals: Universal 4mm safety binding posts on 19mm (0.75") pitch.
Output Impedance: Typically <5m in constant voltage mode.
Typically >50k in constant current mode.
Output Protection: Outputs will withstand forward voltages of up to 20V above the rated
output voltage. Reverse protection by diode clamp for currents up to 3A.
Load Regulation: <0.01% of maximum output for 90% load change.
Line Regulation: <0.01% of maximum output for 10% line change.
Ripple & Noise: Typically <1mVrms (CV mode).
(20MHz bandwidth)
Transient Load Response: <20µs to within 50mV of set level for 90% load change.
Temperature Coefficient: Typically <100ppm/°C.
Status Indication: Output on lamp. Constant current mode lamp.
METER SPECIFICATIONS (Main Outputs)
Meter Types: Dual 3 digit meters with 14mm (0.56") LEDs. Reading rate 4 Hz.
Meter Resolutions: 100mV, 10mA.
Meter Accuracies: Voltage 0.3% of reading ± 1 digit.
Current 0.6% of reading ± 1 digit.
AUXILIARY LOGIC OUTPUT (EL302T only)
Voltage: 5V or 3·3V, selectable by front panel switch.
Voltage Accuracy: ± 3%
Current Limit: 1A minimum.
Output Protection: Output will withstand up to 16V forward voltage. Diode clamp reverse
protection for currents up to 3A.
Ripple & Noise: Typically <1mV rms.
(20MHz bandwidth)
Load & Line Regulation: <0·5% for a 90% load change; <0·1% for a 10% line change.
Status Indication: Current limit lamp.
2
AUXILIARY LOGIC OUTPUT (EL302Tv only)
Voltage: Variable <1.5V to >5V by front panel control.
Meter Voltage Accuracy: 0.3% ± 1 digit.
Current Limit: 2A minimum.
Output Protection: Output will withstand up to 7V forward voltage. Diode clamp reverse
protection for currents up to 3A.
Ripple & Noise Typically <5mVrms, <15mVpk-pk (CV mode).
(20MHz bandwidth):
Load Regulation: <3% for 90% load change.
Line Regulation: <0.2% for 10% line voltage change.
Status Indication: UNREG lamp.
GENERAL
AC Input: 230V AC or 115VAC ± 10%, 50/60Hz. Installation Category II.
Power Consumption: EL301: 85VA max;
EL302/EL183/EL561: 160VA max;
EL302D/EL302T/EL302Tv: 320VA max.
Operating Range: +5ºC to +40ºC, 20% to 80% RH.
Storage Range: -40ºC to + 70ºC.
Environmental: Indoor use at altitudes up to 2000m, Pollution Degree 2.
Safety: Complies with EN61010-1.
EMC: Complies with EN61326.
Size: Singles: 140 x 160 x 295 mm (WxHxD).
Dual & Triple: 260 x 160 x 295 mm (WxHxD).
Weight: EL301: 3.1kg;
EL302/EL183/EL561: 4.1kg;
EL302D/EL302T/EL302Tv: 7.4kg.
3
Safety
This power supply is a Safety Class I instrument according to IEC classification and has been
designed to meet the requirements of EN61010-1 (Safety Requirements for Electrical Equipment
for Measurement, Control and Laboratory Use). It is an Installation Category II instrument
intended for operation from a normal single phase supply.
This instrument has been tested in accordance with EN61010-1 and has been supplied in a safe
condition. This instruction manual contains some information and warnings which have to be
followed by the user to ensure safe operation and to retain the instrument in a safe condition.
This instrument has been designed for indoor use in a Pollution Degree 1 environment (no
pollution, or only dry non-conductive pollution) in the temperature range 5°C to 40°C, 20% - 80%
RH (non-condensing). It may occasionally be subjected to temperatures between +5° and -10°C
without degradation of its safety.
Use of this instrument in a manner not specified by these instructions may impair the safety
protection provided. Do not operate the instrument outside its rated supply voltages or
environmental range. In particular excessive moisture may impair safety.
WARNING! THIS INSTRUMENT MUST BE EARTHED
Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited. The protective action must not be
negated by the use of an extension cord without a protective conductor.
When the instrument is connected to its supply, terminals may be live and opening the covers or
removal of parts (except those to which access can be gained by hand) is likely to expose live
parts. The apparatus shall be disconnected from all voltage sources before it is opened for any
adjustment, replacement, maintenance or repair. Capacitors inside the power supply may still be
charged even if the power supply has been disconnected from all voltage sources but will be
safely discharged about 1 minute after switching off power.
Any adjustment, maintenance and repair of the opened instrument under voltage shall be avoided
as far as possible and, if inevitable, shall be carried out only by a skilled person who is aware of
the hazard involved.
If the instrument is clearly defective, has been subject to mechanical damage, excessive moisture
or chemical corrosion the safety protection may be impaired and the apparatus should be
withdrawn from use and returned for checking and repair.
Make sure that only fuses with the required rated current and of the specified type are used for
replacement. The use of makeshift fuses and the short-circuiting of fuse holders is prohibited.
Do not wet the instrument when cleaning it. The following symbols are used on the instrument:-
Earth (ground) terminal.
mains supply OFF.
l mains supply ON.
alternating current (ac)
direct current (dc)
4
EMC
This instrument has been designed to meet the requirements of the EMC Directive 89/336/EEC.
Compliance was demonstrated by meeting the test limits of the following standards:
Emissions
EN61326 (1998) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use. Test limits used were:
a) Radiated: Class B
b) Conducted: Class B
c) Harmonics: EN61000-3-2 (2000) Class A; the instrument is Class A by product category.
Immunity
EN61326 (1998) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use.
Test methods, limits and performance achieved were:
a) EN61000-4-2 (1995) Electrostatic Discharge : 4kV air, 4kV contact, Performance A.
b) EN61000-4-3 (1997) Electromagnetic Field, 3V/m, 80% AM at 1kHz, Performance B.
c) EN61000-4-11 (1994) Voltage Interrupt, 1 cycle, 100%, Performance B.
d) EN61000-4-4 (1995) Fast Transient, 1kV peak (AC line), 0.5kV peak (DC Outputs),
Performance B.
e) EN61000-4-5 (1995) Surge, 0.5kV (line to line), 1kV (line to ground), Performance B.
f) EN61000-4-6 (1996) Conducted RF, 3V, 80% AM at 1kHz (AC line only; DC Output
connections <3m not tested), Performance A.
According to EN61326 the definitions of performance criteria are:
Performance criterion A: `During test normal performance within the specification limits.'
Performance criterion B: `During test, temporary degradation, or loss of function or
performance which is self-recovering'.
Performance criterion C: `During test, temporary degradation, or loss of function or
performance which requires operator intervention or system reset occurs.'
Where Performance B is stated it is because DC Output regulation may deviate beyond
Specification limits under the test conditions. However, the possible deviations are still small and
unlikely to be a problem in practice.
Note that if operation in a high RF field is unavoidable it is good practice to connect the PSU to
the target system using screened leads which have been passed (together) through an absorbing
ferrite sleeve fitted close to the PSU terminals.
Cautions
To ensure continued compliance with the EMC directive observe the following precautions:
a) after opening the case for any reason ensure that all signal and ground connections are
remade correctly and that case screws are correctly refitted and tightened.
b) In the event of part replacement becoming necessary, only use components of an identical
type, see the Service Manual.
5
Installation
Mains Operating Voltage
Check that the instrument operating voltage marked on the rear panel is suitable for the local
supply. Should it be necessary to change the operating voltage, proceed as follows:
1. Ensure that the instrument is disconnected from the AC supply.
2. Remove the screws holding the case upper and handle and lift off the case upper.
3. Change the transformer connections following the diagram below:
230V Operation 115V Operation
BLUE BROWN BLUE BROWN
4. Re-assemble in the reverse order.
5. To comply with safety standard requirements the operating voltage marked on the rear panel
must be changed to clearly show the new voltage setting.
Fuse
The AC fuse is located in the fuse drawer in the lower part of the IEC inlet connector. To change
the fuse remove the line cord and open the fuse drawer with a suitable tool.
The correct fuse type is 20 x 5mm 250V HBC time-lag with the following rating:
Model 230V 115V
30V/1A 800mA (T) 1.6A (T)
30V/2A; 18V/3.3A; 56V/1.1A 1.25A (T) 2.5A (T)
Dual and Triple 2A (T) 4A (T)
Make sure that only fuses with the required current rating and of the specified type are used for
replacement. The use of makeshift fuses and the short-circuiting of fuseholders are prohibited.
Mains Lead
When a three core mains lead with bare ends is provided this should be connected as follows:
BROWN - MAINS LIVE
BLUE - MAINS NEUTRAL
GREEN/YELLOW - EARTH Safety Earth Symbol
As the colours of the wires in the mains lead of this apparatus may not correspond with the
coloured markings identifying the terminals in your plug proceed as follows:
The wire which is coloured green-and-yellow must be connected to the terminal in the plug which
is marked by the letter E or by the safety earth symbol shown above or coloured green or green-
and-yellow.
The wire which is coloured blue must be connected to the terminal which is marked with the letter
N or coloured black.
The wire which is coloured brown must be connected to the terminal which is marked with the
letter L or coloured red.
WARNING! THIS INSTRUMENT MUST BE EARTHED.
Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited.
6
General
Service Handling Precautions
Service work or calibration should only be carried out by skilled engineers using high quality test
equipment. If the user is in any doubt as to his competence to carry out the work, the instrument
should be returned to the manufacturer or their agent overseas for the work to be carried out.
The tracks on the printed circuit boards are very fine and may lift if subjected to excessive heat.
Use only a miniature temperature-controlled soldering iron and remove all solder with solder wick
or suction before attempting to remove a component.
Dismantling the instrument
WARNING!
When the instrument is connected to its supply, terminals may be live and opening the covers or
removal of parts (except those to which access can be gained by hand) is likely to expose live
parts. The instrument shall be disconnected from all voltage sources before it is opened for any
adjustment, replacement, maintenance or repair. Capacitors inside the power supply may still be
charged even if the power supply has been disconnected from all voltage sources but will be
safely discharged about 1 minute after switching off power.
Any adjustment, maintenance and repair of the opened instrument under voltage shall be avoided
as far as possible and, if inevitable, shall be carried out only by a skilled person who is aware of
the hazard involved.
1. Remove the 6 side screws and two handle screws to release the top cover.
2. Remove the screws at the front edge of the chassis that secure the front panel assembly to
the chassis (2 on the singles, 4 on the dual/triple); the front panel assembly can now be laid
flat to give better access to its own pcb and the driver pcb in the chassis.
3. To remove the driver pcb first unplug the transformer, power transistor and control
connectors from the pcb, noting their orientation (pin 1 on the socket to corner marker on the
pcb header). Unclip the pcb from the nylon mounting pillars and lift free.
4. The auxiliary output driver pcb on the triple can similarly be removed from the heatsink
bracket.
5. To remove the control pcb from the front panel first pull off the control knobs. Remove the
screws that secure the pcb to the backs of the terminal, the front panel bracket and front
moulding and lift the pcb clear. Note that prior to the introduction of the PSU 'safety'
terminals mid 2006, the fastenings for the terminals were 4BA.
6. To access the power transistors on the large heatsink(s) remove the 2 screws retaining each
heatsink.
7. Reassemble in reverse order taking great care to ensure that all connections are remade
exactly as before dismantling and that no insulation creepage and clearance distances have
been compromised.
7
Model Changes (as at September 2006)
C21 and C22 (C121 and C122) on the Driver pcb are now both 470uF to prevent the output from
occasionally turning on briefly when the mains power switch is turned off.
The Control pcbs for both the singles and dual/triple units have undergone revisions since
introduction; both pcbs have been changed to use surface mount components wherever possible
and the dual/triple Control has had further minor changes for the EL302Tv model. The particular
version can be identified by the part number printed on the Control pcb; each version has its own
Component Layout and Parts List but the circuit descriptions are common because the
component references are unchanged between versions.
The versions are as follows:
Singles
Version 1: All through-hole components, built on pcb part number 35555-2890.
Version 2: Surface-mount version, from mid-2004, built on pcb part number 35555-4240.
Dual/Triple
Version 1: All through-hole components, built on pcb part number 35555-2870.
Version 2: Surface-mount version, from mid-2004, built on pcb part number 35555-4370.
Version 3: Minor further changes necessary for EL302Tv, from August 2006, built on pcb
part number 35555-4710.
The EL302Tv uses a different auxiliary output driver assembly, built on pcb part number
35555-4720, with a variable 1·5V to 5V output controlled by VR11 on the Version 3 Control board.
In mid-2006, revised 'safety' terminals were introduced, as standard, to all models. These
terminals will accept 4mm safety leads with a fixed shroud. The fastener changes associated
with these revised terminals are shown separately at the end of the Parts Lists and apply to all
models.
8
Circuit Descriptions
The driver board contains the main power supply and its driver components plus the auxiliary
supplies for the control board. The control board contains the control, measurement and displays.
The auxiliary output is on a separate pcb.
Component references apply to all the single output supplies and Channel A on dual and triple
models (the left-hand channel when viewed from the front). Channel B components are all
numbered from 100 upwards, e.g. RP3, C9 and R24 on Channel A are RP103, C109 and R124
on Channel B.
The linear regulator is in series with the positive output but, because of the way in which the
control and metering works, it is convenient to consider the regulator output (OP) as 0V and to
regard the negative output as the controlled output voltage (-V).
Supply rail and signal names on the schematics are followed by A or B for Channels A and B
respectively, e.g. OP/A, IOHIA or AuxA/+5V.
Driver Pcb
The main winding is tapped (not EL301) to reduce overhead and therefore dissipation in the
series regulator. The relay selects the appropriate tap which is determined by the voltage on the
output terminals; see relay check in the Calibration section. A full wave bridge rectifier feeds
reservoir capacitor C31.The total secondary winding voltage at full load and the reservoir
capacitor voltage off load/full load are listed below for the different models at nominal mains
(230V):
EL301/302 EL183 EL561
Secondary (Vrms) 35 23 62
Reservoir off-load (VDC) 47 31 84
Reservoir full-load (VDC) 38 25 71
A 21Vrms centre tapped winding and full wave rectification provide the auxiliary supplies for the
different models at nominal mains. IC8 generates +5V for the micro-controller and display.
Q7 and D10 generate +7.5V and D11 5V.
Comparator IC9A compares the voltage on the output terminals to a reference derived from the
5V rail. When the output voltage falls below the relay change voltage Q5 is turned off and Q6
on, the relay selects the low tap on the transformer secondary. R64 is model dependent, see
Parts Lists and Schematics. When the output on/off switch is off, SW1 is high turning the relay
drive off, selecting the high tap on the transformer.
Q1, Q4 and the transistor(s) on the large heatsink form a triple darlington series regulator
controlled by the error amplifiers on the control board.
3.3V/5V Auxiliary Pcb (EL302T only)
The bridge rectifier feeds reservoir capacitor C203. The full load secondary voltage is 7·9Vrms
giving 9·4VDC (off load) and 8·0VDC (with a 1A output load) at the reservoir capacitor.
IC203 is a low drop adjustable negative voltage regulator. The regulator generates an internal
1.22V reference between pins 1 and 4. When the output is set to 5V, the end of R203 is open;
when set to 3.3V R203 is connected across R202 by the front panel switch SW3.
IC202 is a 2.5V reference and IC201A a comparator. When the output is set to 5V the end of
R208 is open; if the output falls below 4.6V IC201A's output goes low turning on the Current Limit
LED. When the output is set to 3.3V R208 is connected across R207 by the front panel switch
SW3; when the output drops below 3.1V the Current Limit LED is again lit.
9
1.5V to 5V Auxiliary Pcb (EL302Tv only)
The bridge rectifier feeds reservoir capacitor C4. The full load secondary voltage is 8.2Vrms with
the output set to 5V and a 2A load.
IC1 is a 300kHz step down (buck) regulator. The feedback voltage is compared against an
internal 0.92V reference. The output voltage is set by the front panel control VR11, which is in the
feedback path.
IC3 is a 2.5V reference and this is divided down to give 0.86V. If the feedback voltage goes below
this level due to excess output current, comparator IC2B lights the Unreg led.
The RH voltmeter measures the output voltage via an isolation circuit. Opto-isolator IC4 has one
led and two matched photo diodes inside. One photo diode is placed in the feedback path of IC2A
to linearise the output from the photo diodes. R64 on the RH side output converts this current
back to a voltage and the ADC reads this when the Show Aux Output switch SW2A is closed.
The preset current limit value is achieved by measuring the voltage on the top end of the RH
output Current control and is selected by SW2B.
Control Board
Voltage Control
IC7C buffers the voltage control potentiometers VR1 and VR2; VR5 sets the maximum output
voltage. D6 provides the reference (VREF) which is nominally 2·45V.
IC7A is a differential amplifier. VR9 trims differential gain to ensure good voltage regulation, see
Calibration section.
The output of IC7C drives the input of IC7A when the ON-OFF switch, SW1B, is in the ON
position. When SW1B is in the OFF position the input of IC7A is grounded via R50, setting the
output volts to zero.
The output of IC7A provides the base drive (BASE) to the regulating transistors Q4 and Q1 on the
driver pcb via D3.
Current Control
IC7D is the error amplifier which compares the voltage on the wiper of VR3, the current limit
control, with the voltage generated across the current sense resistor R21. When the output
current reaches the set limit IC7D takes control via D4, changing the supply from constant voltage
to constant current mode. At the same time Q1 is turned on by IC7D, making ILIMIT go high; this
is read by the microcontroller IC3 which turns on the constant current lamp, LED2.
VR4 sets the maximum output current; VR8 adjusts the output current to be the same as the
preset current at low levels, see Calibration section.
Measurement and Display
The measurement and display is controlled by a microcontroller, IC3. IC5, IC2 and associated
components, together with IC3, form a dual slope A-to-D converter. Multiplexer IC4, under the
control of IC3, selects the signals to be measured. The status line SW1 from the output ON/OFF
switch is read by IC3 to determine which signals are measured, as follows:
Status Voltage Measurement Current Measurement
Output Off Preset Volts (VPRT & ILO) Preset Current (IPHI & ILO)
Output On Output Volts (+SENSE & VOLO) Output Current (IOHI & ILO)
IC3 processes the measurement and drives the two multiplexed 3-digit, 7-segment, LED displays
via digit driver IC1 and segment latch IC6. Individual segment current limit is provided by RP1
and RP2. The constant current lamp, LED2, is part of this multiplexing scheme; the output on
lamp, LED1, is driven directly from the +5V auxiliary rail via R2 when the dc output switch SW1-A
is closed.
10
Calibration
Refer to the General section for dismantling instructions and safety precautions. Component
adjustment references are given as Channel A/ Channel B, e.g. VR5/VR105; Channel A is the
left-hand output. For single output supplies use Channel A references. All adjustments are on the
front panel control board.
Limits given are for 30V units; values in [ ] brackets are for 18V and 56V models respectively.
Allow 5 minute warm-up before commencing calibration.
Control pcb calibration points (viewed from rear)
Equipment Required
A 5½ digit multimeter with better than 0·05% accuracy on dc volts and better than 0·1% accuracy
on dc current (to 5A); alternatively use a precision shunt for current measurement.
Rheostat or other high power load arrangement to provide up to 2A load at 30V [3A/18V,1A/56V].
Voltage Calibration
Connect the DMM (set to volts 0) across the output. Set voltage and current controls to minimum.
Switch output ON (Check LED is on) and check for a reading of 00·0V ± 0·1V on the Volts display
and DMM; check the Amps display reads 0·00 ± 0·01A.
Set voltage and current controls to maximum. Adjust VR5/VR105 (maximum output volts) for a
reading of 30·8 [18·3, 56·4] on the DMM. Adjust VR6/VR106 (measured output volts) until the
Volts display matches the reading on the external DMM.
Switch output OFF. Adjust VR10/110 (preset volts) until the Volts display shows 30·8 [18·3, 56·4].
Current Calibration
Switch output OFF. Set output voltage to nominally 2V. Set current control to minimum. Connect
the DMM (set to Amps) and load in series across the output. Switch output ON.
Adjust VR8/108 (offset compensation of current control error amp) for a reading of 0·003A
± ·001A on the DMM. Check that the CC LED is ON.
Increase voltage controls and current control to maximum. Adjust load until the DMM reads 2·00A
[3·00, 1·00] ± 0·02A. Adjust VR7/107 (measured output current) until the Amps display matches
the DMM reading.
Reduce load until the CC LED is ON. Adjust VR4/104 (maximum output current) until the Amps
display shows 2·05 [3·34, 1·13].
11
Voltage Regulation
Connect the DMM (set to Volts) across the output, no load, output ON.
Adjust voltage controls for a reading of 18.xxxx on the DMM; note exact reading.
Connect load, set current control to maximum and adjust load for 2A [3A, 1A] output current.
Adjust VR9/109 (differential voltage gain) until the external DMM matches the previous reading
exactly.
3·3V/5V Output Check (EL302T only)
Connect the DMM to the output. With switch set to 3·3V position check for a reading of 3·20 to
3·40 Volts.
Switch to the 5V position and check output is between 4·85V and 5·15V.
1.5V to 5V Pcb (EL302Tv only)
Set the output voltage to maximum and connect a DMM to its output. Set the RH output switch to
off. Press the Show Aux Output switch and adjust VR1 on the 5V pcb so the RH voltmeter
matches the DMM reading.
Relay Changeover Voltage Check (not EL301)
With no load connected set the output voltage to approximately 12V. Increase the voltage
gradually and check that the relay changeover occurs (audible click) at between 14·0V and 14·5V
[10·3/10·9V, 25·9/26·7V].
After the relay has changed over reduce the voltage gradually and check that the relay changes
back at between 13·3V and 13·9V [9·7/10·3V, 24·6/25·4V].
12
Parts List
PCB ASSEMBLY CONTROL (Version 1) EL301/302/561/183 (COMMON PARTS)
Part No. Description Position
20661-0800 SPACER TRAN MTG TO18 FOR D6
20661-0851 SPACER .56 INCH 7-SEG LED DIS1, 2
22225-0220 SWITCH PUSH/PUSH SW1
22573-0210 HEADER 10 WAY STRAIGHT .156P PJ1
23202-0100 RES 10R0F W25 MF 50PPM R50
23202-0220 RES 22R0F W25 MF 50PPM R25
23202-1100 RES 100RF W25 MF 50PPM R40
23202-1220 RES 220RF W25 MF 50PPM R10
23202-1470 RES 470RF W25 MF 50PPM R45
23202-1330 RES 330RF W25 MF 50PPM R22
23202-1680 RES 680RF W25 MF 50PPM R2
23202-2100 RES 1K00F W25 MF 50PPM 11,12, 23, 46, 48
23202-2180 RES 1K80F W25 MF 50PPM R41
23202-2470 RES 4K7OF W25 MF 50PPM R38,39
23202-2499 RES 4K99F W25 MF 50PPM R34
23202-2820 RES 8K20F W25 MF 50PPM R18
23202-3100 RES 10K0F W25 MF 50PPM R4, 5,14,15,17, 24, 28, 30, 32, 43, 44, 51
23202-3143 RES 14K3F W25 MF 50PPM R35
23202-3240 RES 24K0F W25 MF 50PPM R27
23202-3330 RES 33K0F W25 MF 50PPM R6,7,8
23202-3560 RES 56K0F W25 MF 50PPM R31
23202-4180 RES 180KF W25 MF 50PPM R1
23202-4220 RES 220KF W25 MF 50PPM R42
23202-4470 RES 470KF W25 MF 50PPM R29
23202-5100 RES 1M00F W25 MF 50PPM R19
23202-6100 RES 10M0F W25 MF 50PPM R13, 26
23301-0415 RES NETWK SIL 1K0 X 4S RP3
23301-0464 RES NETWK SIL 56R X 4S RP1,2
23320-0003 RES R10 - FERRYALLOY R21
23347-0330 POT 10K LIN SPLINE SHAFT 25MM VR1,2
23347-0340 POT 10K LOG SPLINE SHAFT 25MM VR3
23377-2220 RES PS/H 2K2 CF 10MM VR6, 9,10
23377-2470 RES PS/H 4K7 CF 10MM VR5
23377-4100 RES PS/H 100K CF 10MM VR8
23379-1100 RES PS/H 100R CERMET 10MM VR7
13
PCB ASSEMBLY CONTROL (Version 1) EL301/302/561/183 (COMMON PARTS)/continued...
Part No. Description Position
23424-0443 CAP 10NZ 1KV CER D10 P5 C30
23427-0323 CAP 22PG 100V CER NPO P5 C4, 5
23427-0329 CAP 47PG 63V CER N150 P5 C15,17, 29, 42
23427-0353 CAP 220PG 100V CER N750 P5T C19
23427-9211 CAP 470PK 100V CER MED K P2.5 C32, 33
23557-0511 CAP 47U 10V ELEC RC2 P2 C7
23557-0612 CAP 1U0 100V ELEC RE2 P2 C18,23,37
23557-0647 CAP 10U 35V ELEC RE2 P2 C25,26
23557-0665 CAP 2U2 50V ELEC RE2 P2 C16
23557-0668 CAP 220U 10V ELEC RE2 P2.5 C21
23620-0246 CAP 100NK 63V P/E P5 C3, 6, 8, 9,12, 27, 28, 31
23620-0247 CAP 220NK 63V P/E P5 C1
23620-0249 CAP 330NK 63V P/E P5 C10,11
23620-9007 CAP 10NK 100V P/E P5 C13,14
23685-0007 CAP 100NK 160V P/P MKP4 P10 C2
25021-0901 DIO 1N4148 B/R D1, 2, 3, 4, 5, 7, 8
25061-0200 LED T1 ROUND (3MM) RED LED1, 2
25061-0519 DISPLAY 3 DIG .56 LED 9MM LEG DIS1, 2
25117-0020 DIO 1N5401 D10
25336-5590 TRAN PNP BC559C Q1
25377-5490 TRAN NPN BC549C Q2
27106-0506 IC LM324N IC7
27106-0646 IC LF347 BI-FET OP AMP IC5
27161-0120 IC V/REF ZRA245(ZR404) 2.45V D6
27164-0507 IC ULN-2003A IC1
27226-0520 IC 4052B IC4
27226-0530 IC 4053B IC2
27231-5740 IC 74HC574 IC6
27250-2000 IC MCU8 PIC16C55XTP IC3
28502-0010 RESONATOR CER 4MHZ XTAL1
35555-2890 PCB CONTROL
14
PCB ASSEMBLY CONTROL (Version 2) EL301/302/561/183 (COMMON SM STAGE)
Part Number Description Position
23105-0000 RES SM0805 ZERO OHM R9, R16, R20
23105-0100 RES SM0805 10R0F W1 R50
23105-0220 RES SM0805 22R0F W1 R25
23105-0560 RES SM0805 56R0F W1 R53-60
23105-1100 RES SM0805 100RF W1 R40
23105-1220 RES SM0805 220RF W1 R10
23105-1470 RES SM0805 470RF W1 R45
23105-1680 RES SM0805 680RF W1 R2
23105-2100 RES SM0805 1K00F W1 R11-12, R23, R48, R70-73
23105-2160 RES SM0805 1K60F W1 R35A
23105-2390 RES SM0805 3K90F W1 R34
23105-2470 RES SM0805 4K70F W1 R38-39
23105-2820 RES SM0805 8K20F W1 R18
23105-3100 RES SM0805 10K0F W1 R24,R41
23105-3110 RES SM0805 11K0F W1 R51
23105-3130 RES SM0805 13K0F W1 R35
23105-3270 RES SM0805 27K0F W1 R27
23105-3330 RES SM0805 33K0F W1 R6-8
23105-3560 RES SM0805 56K0F W1 R31
23105-4470 RES SM0805 470KF W1 R29,42
23105-5100 RES SM0805 1M00F W1 R19
23105-6100 RES SM0805 10M0F W1 R13,R26
23106-3100 RES SM0805 10K0D W1 25PPM R4-5, R14-15, R17, R30, R32, R43
23106-3110 RES SM0805 11K0D W1 25PPM R28
23405-0221 CAP SM0805 220P CER COG C19, C24
23405-0470 CAP SM0805 47P CER COG C15, C17, C29, C42
23461-0020 CAP SM0805 100NZ 50V CER Y5V C27-28
25021-0010 DIO SM LL4148 SWITCHING D1-5,D7-8
25340-1000 TRAN SM PNP BC859C Q1
25377-1000 TRAN SM NPN BC849C Q2
27106-1160 IC SM LM324M OP AMP IC7
27106-1460 IC SM LF347M BIFET OP AMP IC5
27161-2030 IC SM V/REF ZRC250 2.5V 2% D6
27227-0520 IC SM 4052 IC4
27227-0530 IC SM 4053 IC2
27239-5740 NC SM 74HC574 IC6
27250-2150 IC SM PIC16C55A-04/SO IC3
28502-1000 RESONATOR SM CSTCR4M00G53-R0 XTL1
35555-4240 PCB - CONTROL
15
PCB ASSEMBLY CONTROL (Version 2) EL301/302/561/183 (COMMON PARTS)
Part Number Description Location
20661-0851 SPACER .56 INCH 7-SEG LED FOR DISP1-2
22225-0220 SWITCH PUSH/PUSH SPPH11470B SW1
22573-0210 HEADER 10 WAY STRAIGHT .156P PJ1
23202-1330 RES 330RF W60 MF 50PPM R22
23202-2360 RES 3K60F W60 MF 50PPM R46
23202-3100 RES 10K0F W60 MF 50PPM R44
23202-4180 RES 180KF W60 MF 50PPM R1
23320-0003 RES R10 - FERRYALLOY R21
23347-0330 POT 10K LIN SPLINE SHAFT 25MM VR1-2
23347-0340 POT 10K LOG SPLINE SHAFT 25MM VR3
23377-2100 RES PS/H 1K0 CF 10MM VR9
23377-2220 RES PS/H 2K2 CF 10MM VR4,6,10
23377-2470 RES PS/H 4K7 CF 10MM VR5
23377-4100 RES PS/H 100K CF 10MM VR8
23379-1100 RES PS/H 100R CERMET 10MM VR7
23424-0443 CAP 10NZ 1KV CER D10 P5 C30
23427-9211 CAP 470PK 100V CER MED K P2.5 C32-33
23557-0500 CAP 1U0 50V ELEC RC2 P1.5 C18
23557-0500 CAP 1U0 50V ELEC RC2 P1.5 C23
23557-0512 CAP 220U 10V ELEC 7MM P2.5 C21
23557-0513 CAP 10U 35V ELEC 7MM P2 C7
23557-0612 CAP 1U0 100V/50V ELEC RE2 P2 C16
23557-0647 CAP 10U 35V ELEC RE2 P2 C25-26
23620-0246 CAP 100NK 63V P/E P5 C3,C6,C8-9,C12,C31
23620-0247 CAP 220NK 63V P/E P5 C1
23620-0249 CAP 330NK 63V P/E P5 C10-11
23620-9007 CAP 10NK 100V P/E P5 C13-14
23685-0007 CAP 100NK 250V P/P MKP4 P10 C2
25061-0200 LED - T1 ROUND (3mm) - RED LED1-2
25061-0519 DISPLAY 3 DIG .56 LED 9MM LEG DISP1-2
25117-0020 DIO 1N5401 D10
27164-0507 IC ULN-2003A IC1
16
PCB ASSEMBLY CONTROL (Versions 1 & 2) EL301/302/561/183 (UNIQUE PARTS)
EL301 EL302 EL561 EL183
C20 100U50V 100U50V 22U100V 100U50V
C22 - - 22U100V -
R3 75K0F 75K0F 75K0F 137KF
R33 15K0F 15K0F 3K60F 15K0F
R36,37 200KF 200KF 200KF 120KF
R47 20K0F 10K5F 20K0F 6K20F
VR4 2K2 1K0 2K2 1K0
On Version 2 Control, VR4 is 2K2 on all models.
Part Numbers of Unique Parts
Part Number Description
23202-2360 RES 3K60F W25 MF 50PPM
23202-2620 RES 6K20F W25 MF 50PPM
23202-3105 RES 10K5F W25 MF 50PPM
23202-3150 RES 15K0F W25 MF 50PPM
23202-3200 RES 20K0F W25 MF 50PPM
23202-3750 RES 75K0F W25 MF 50PPM
23202-4120 RES 120KF W25 MF 50PPM
23202-4137 RES 137KF W25 MF 50PPM
23202-4200 RES 200KF W25 MF 50PPM
23377-2100 RES PS/H 1K0 CF 10MM
23377-2220 RES PS/H 2K2 CF 10MM
23557-0825 CAP 100U 50V LOW ESR
23557-0826 CAP 22U 100V LOW ESR
PCB ASSEMBLY DRIVER EL301/302/561/183 (COMMON PARTS)
Part Number Description Position
20030-0263 WASHER M3 ZPST FOR IC8/Q1
20038-9501 WASHER M3 SPRING FOR IC8/Q1
20210-0101 NUT M3 ZPST FOR IC8/Q1
20234-0011 SCREW M3 X 10 PNHDPZ ZPST FOR IC8/Q1
20611-0003 BUSH POLYESTER TO220 FOR IC8/Q1
20613-0006 SIL-PAD TO220 FOR IC8/Q1
20670-0180 HEATSINK PCB MTG 63MM HIGH FOR IC8/Q1
22240-0120 RELAY 12V SPDT RL1
22315-0454 FUSE 2.0AT SUBMIN PCB MTG FS1, 2
22573-0204 HEADER 4 WAY STRAIGHT .156P PJ7
22573-0206 HEADER 6 WAY STRAIGHT .156P PJ6
22573-0210 HEADER 10 WAY STRAIGHT .156P PJ5
23185-0000 RES ZERO OHM LK1-6
17
PCB ASSEMBLY DRIVER EL301/302/561/183 (COMMON PARTS)/continued...
Part Number Description Position
23202-0470 RES 47R0F W25 MF 50PPM R19, 50, 56
23202-1100 RES 100RF W25 MF 50PPM R2,3
23202-1270 RES 270RF W25 MF 50PPM R59
23202-2100 RES 1K00F W25 MF 50PPM R58
23202-2220 RES 2K20F W25 MF 50PPM R4, 5, 65, 66
23202-3470 RES 47K0F W25 MF 50PPM R62, 63, 68
23202-3820 RES 82K0F W25 MF 50PPM R60
23202-5330 RES 3M30F W25 MF 50PPM R61
23557-0615 CAP 470U 16V C22
23557-0647 CAP 10U 35V ELEC RE2 P2 C23, 24
23557-0655 CAP 470U 35V C21
23557-0658 CAP 100U 25V ELEC RE2 P2.5 C37
23685-0008 CAP 100NK 160V P/P P15 C30
25021-0901 DIO 1N4148 D9,12
25115-0907 DIO 1N4002 D1-4, 8
25130-0231 DIO ZEN 8V2 W4 D10
25130-0903 DIO ZEN 5V1 W4 D11
25383-0505 TRAN NPN BC338 Q5-7
27106-0513 IC LM358N IC9
27160-0009 IC V/REG 7805 IC8
35515-1600 PCB - DRIVER
PCB ASSEMBLY - DRIVER - EL301/302/561/183 (UNIQUE PARTS)
EL301 EL302 EL561 EL183
C31 - 1000U63V 470U100V 2200U50V
C32,34 1000U63V 1000U63V 470U100V 2200U50V
C33 - 1000U63V 470U100V -
C35,36 - 2U2100V 2U2100V 2U2100V
D17,19,21,23 1N5401 1N5401 1N5401 BR1
LK7 0R - - -
Q1 TIP31A TIP31A TIP31C TIP31A
Q4 BC546 BC546 ZTX453 BC546
R20 0R 1R 1R 0R47
R21,22 - 1R - 0R47
R23 - 1R 1R 0R47
R64 - 300K 590K 210K
R67 2K2 2K2 4K7 2K2
18
PART NUMBERS OF UNIQUE PARTS
Part Number Description
23185-0000 RES ZERO OHM
23202-4210 RES 210KF W25 MF 50PPM
23202-4300 RES 300KF W25 MF 50PPM
23202-4590 RES 590KF W25 MF 50PPM
23206-0010 RES 1R00F W6 MF 100PPM
23206-2220 RES 2K20F W6 MF 50PPM
23206-2470 RES 4K70F W6 MF 50PPM
23213-0005 RES 0R47J W25 MF 200PPM
23557-0654 CAP 1000U 63V
23557-0682 CAP 470U 100V
23557-0683 CAP 2200U 50V
23620-0257 CAP 2U2K 100V P/E
25117-0020 DIO 1N5401
25117-0030 DIO 1N5404
25383-0507 TRAN NPN BC546
25386-0030 TRAN NPN TIP31C
25386-9300 TRAN TIP31A
25388-0240 TRAN NPN ZTX453
HEATSINK ASSEMBLY EL301/302/561/183
Part Number Description Position
20030-0240 WASHER 4BA ZPST
20038-9503 WASHER M3.5 SPRING
20100-9201 NUT 4BA FULL STEEL
20134-9007 SCREW 4BA x ½" POZI PAN
20611-0007 TRANSISTOR MOUNT - T03
20613-0014 SIL-PAD T03
20670-9001 HEATSINK KP314
22451-0200 SOLDER TAG 4BA
25386-9201 TRAN 2N3055 EL301/302/154
25389-0020 TRAN 2N3442 EL561
19
CASE PARTS - EL301/302/561/183
Parts marked with change with the introduction of the revised 'safety' terminals, see last Parts List.
Part Number Description Position
20030-0240 WASHER 4BA ZPST CONTROL TO SPACER
20030-0263 WASHER M3 ZPST CONTROL PCB TO GROUND
STANDOFFS, BRACKET TO MOULDING
20030-0264 WASHER M2.5 ZPST CONTROL PCB TO MOULDING
20030-0266 WASHER M4 ZPST SAFETY EARTH
20037-0247 WASHER 4BA SHK/PROOF I/T ZPST EARTH TERMINAL,
FRONT PANEL TO CHASSIS
20037-0301 WASHER M3 SHK/PROOF I/T ZPST CONTROL TO GROUND
20037-0305 WASHER 5/16 in. SHK/PROOF I/T ZPST EARTH TERMINAL
20037-0401 SOLDER TAG SHAKEPROOF - 4BA SAFETY EARTH
20038-9502 WASHER M4 SPRING SAFETY EARTH
20038-9503 WASHER M3.5 SPRING TERMINALS
20062-9304 SCREW No.6 x 5/8 in. POZI. PAN HEATSINK MOUNTING
20062-9501 SCREW No.6 x 3/4 in. RAISED CKHDPZ HANDLE TO COVER,
HANDLE TO L BRACKET
20063-0010 SCREW No.6 x 3/8 NIB HDPZ ST/AB COVER TO CHASSIS,
HEATSINK BRACKET,
TRANSFORMER TO CHASSIS
20065-0020 SCREW 2-28 c 5/16 PLAS PNHDPZ CONTROL PCB &
L BRACKET TO MOULDING
20065-1000 SCREW K35 x 8 TORX SPACERS/CHASSIS,
FRONT PANEL TO CHASSIS
20134-9005 SCREW 4BA x ¼ in. POZI PAN TERMINALS
20210-0102 NUT M4 ZPST SAFETY EARTH
20213-0040 CAPTIVE NUT SPIRE No.6 COVER TO CHASSIS,
HANDLE TO COVER,
HANDLE TO L BRACKET,
HEATSINK MOUNTING,
HEATSINK BRACKET,
TRANSFORMER
20234-0024 SCREW M3 x 16 PNHDPZ ZPST CONTROL TO GROUND
20236-0010 SCREW M4 x 12 TAMPERPROOF SAFETY EARTH
20612-0011 WASHER FIBRE M3 CONTROL TO MOULDING
20653-0204 CABLE TIE 75 X 2.5MM MAINS HARNESS TO CHASSIS
20661-0256 SPACER RND 9/64 IDx1/8 L NYL TERMINALS
20661-0278 SPACER HEX 4BA x 9.53 NPBR TERMINALS TO PCB
20661-0605 SPACER, PCB SUPPORT 7/8 NYL DRIVER PCB
20661-0900 SPACER TRANSIBLOCK HEATSINK
20662-9301 SELF-ADHESIVE FEET
22115-0410 TRANSFORMER EL302
20
CASE PARTS - EL301/302/561/183/continued...
Part Number Description Position
22115-0430 TRANSFORMER EL183
22115-0440 TRANSFORMER EL561
22115-0450 TRANSFORMER EL301
22219-0090 SWITCH ROCKER DPST GREY 12
22225-0222 PUSHBUTTON PB10/50/000 BLACK
22315-0312 FUSE 1.25A TL HRC S/F
22315-0316 FUSE 1.6A TL HRC S/F
22315-0311 FUSE 800mA TL HRC S/F
22315-0325 FUSE 2.5A TL HRC S/F
22491-0120 MAINS LD 2M ST IEC/UK PLUG 5A
22491-0120 MAINS LD 2M ST IEC/EURO PLUG
22491-0120 MAINS LD 2M ST IEC/USA PLUG
22520-0200 AC RECEP 10AMP FUSED SNAP-IN
22571-0675 TERMINAL TP/2 RED/GREY
22571-0685 TERMINAL TP/2 BLACK/GREY
22571-0696 TERMINAL TP/2 GREY/GREY
22571-0691 WASHER ALUMINIUM FOR TP2 EARTH TERMINAL
22575-0204 SKT 4W .156 20AWG (YELLOW) IDT HEATSINK
22575-0206 SKT 6W .156 20AWG (YELLOW) IDT TRANSFORMER/DRIVER PCB
22575-0210 SKT 10W .156 20AWG (YELLOW) IDT CONTROL/DRIVER
29211-0110 HANDLE 6in BLACK/NICKEL
25211-0300 BRIDGE RECTIFIER 25 AMP 200V BR1 (EL183 ONLY)
31512-0690 BRACKET F/PANEL EL/EX S
31512-0700 BRACKET - HEATSINK
33111-0280 BRACKET HANDLE SUPPORT
33147-0130 FRONT MOULDING EL
33331-5820 OVERLAY NAME & LOGO - EL302
33331-5920 OVERLAY NAME & LOGO - EL561
33331-5930 OVERLAY NAME & LOGO - EL183
33331-5940 OVERLAY NAME & LOGO - EL301
33331-5910 OVERLAY TERMINAL AREA
33533-0380 OVERLAY DISPL WINDOW
33536-4070 CHASSIS - PRINTED EL
33536-4080 COVER - PAINTED EL
48511-0960 INSTRUCTION MANUAL
21
PCB ASSEMBLY CONTROL (Version 1) EL302D & EL302T
Part Number Description Position
20661-0800 SPACER TRANSISTOR MTG D6,106
20661-0851 SPACER .56 INCH 7-SEG LED DIS1, 2,101,102
22225-0220 SWITCH PUSH/PUSH SW1,101
22573-0210 HEADER 10 WAY STRAIGHT .156P PJ1,101
22574-0122 SKT DIL 28 PIN IC3,103
23202-0100 RES 10R0F W25 MF 50PPM R50,150
23202-0220 RES 22R0F W25 MF 50PPM R25,125
23202-1100 RES 100RF W25 MF 50PPM R40,140
23202-1220 RES 220RF W25 MF 50PPM R10,110
23202-1470 RES 470RF W25 MF 50PPM R45,145
23202-1330 RES 330RF W25 MF 50PPM R22,122
23202-1680 RES 680RF W25 MF 50PPM R2,102
23202-2100 RES 1K00F W25 MF 50PPM R11,12,23, 46, 48,111,112,123,146,148
23202-2180 RES 1K80F W25 MF 50PPM R41,141
23202-2470 RES 4K70F W25 MF 50PPM R38,39,138,139
23202-2499 RES 4K99F W25 MF 50PPM R34,134
23202-2820 RES 8K20F W25 MF 50PPM R18,118
23202-3100 RES 10K0F W25 MF 50PPM R4,5,14,15,17, 24, 28, 30, 32, 43, 44, 49,
51, 104,105, 114,115,117,124,128,130,
132,143, 144, 149,151
23202-3105 RES 10K5F W25 MF 50PPM R47,147
23202-3143 RES 14K3F W25 MF 50PPM R35,135
23202-3150 RES 15K0F W25 MF 50PPM R33,133
23202-3240 RES 24K0F W25 MF 50PPM R27,127
23202-3330 RES 33K0F W25 MF 50PPM R6, 7, 8,106,107,108
23202-3560 RES 56K0F W25 MF 50PPM R31,131
23202-3750 RES 75K0F W25 MF 50PPM R3,103
23202-4180 RES 180KF W25 MF 50PPM R1,101
23202-4200 RES 200KF W25 MF 50PPM R36, 37,136,137
23202-4220 RES 220KF W25 MF 50PPM R42,142
23202-4470 RES 470KF W25 MF 50PPM R29,129
23202-5100 RES 1M00F W25 MF 50PPM R19,119
23202-6100 RES 10M0F W25 MF 50PPM R13, 26,113,126
23301-0415 RES NETWK SIL 1K0 X 4S RP3,103
23301-0464 RES NETWK SIL 56R X 4S RP1,2,101,102
23320-0003 RES R10 - FERRYALLOY R21,121
23347-0330 POT 10K LIN SPLINE SHAFT 25MM VR1, 2,101,102
23347-0340 POT 10K LOG SPLINE SHAFT 25MM VR3,103
23377-2100 RES PS/H 1K0 CF 10MM VR4,104
22
PCB ASSEMBLY CONTROL (Version 1) EL302D & EL302T/continued...
Part Number Description Position
23377-2220 RES PS/H 2K2 CF 10MM VR6, 9,10,106,109,110
23377-2470 RES PS/H 4K7 CF 10MM VR5,105
23377-4100 RES PS/H 100K CF 10MM VR8,108
23379-1100 RES PS/H 100R CERMET 10MM VR7,107
23424-0443 CAP 10NZ 1KV CER D10 P5 C30,130
23427-0323 CAP 22PG 100V CER NPO P5 C4,5,104,105
23427-0329 CAP 47PG 63V CER N150 P5 C15,17, 29, 42,115,117,129,142
23427-0353 CAP 220PG 100V CER N750 P5T C19,119
23427-9211 CAP 470PK 100V CER MED K P2.5 C32, 33,132,133
23557-0511 CAP 47U 10V ELEC RC2 P2 C7,107
23557-0612 CAP 1U0 100V ELEC RE2 P2 C18, 23, 37,118,123,137
23557-0647 CAP 10U 35V ELEC RE2 P2 C25, 26,125,126
23557-0665 CAP 2U2 50V ELEC RE2 P2 C16,116
23557-0668 CAP 220U 10V ELEC RE2 P2.5 C21,121
23557-0825 CAP 100U 50V LOW ESR P3.5 C20,120
23620-0246 CAP 100NK 63V P/E P5 C3, 6, 8, 9,12, 27, 28, 31,103,106,108,
109,112,127,128,131
23620-0247 CAP 220NK 63V P/E P5 C1,101
23620-0249 CAP 330NK 63V P/E P5 C10,11,110,111
23620-9007 CAP 10NK 100V P/E P5 C13,14, 35,113,114,135
23685-0007 CAP 100NK 160V P/P P10 C2,102
25021-0901 DIO 1N4148 D1, 2, 3, 4, 5, 7, 8,101,102,103,104,105,
107,108
25061-0200 LED - T1 ROUND (3mm) - RED LED1, 2,101,102
25061-0519 DISPLAY 3 DIG .56 LED 9MM LEG DIS1, 2,101,102
25117-0020 DIO 1N5401 D10,110
25336-5590 TRAN PNP BC559C Q1,101
25377-5490 TRAN NPN BC549C Q2,102
27106-0506 IC LM324N IC7,107
27106-0646 IC LF347 BI-FET OP AMP IC5,105
27161-0120 IC V/REF ZRA245(ZR404) 2.45V D6, 106
27164-0507 IC ULN-2003A IC1,101
27226-0520 IC 4052B IC4,104
27226-0530 IC 4053B PIN IC2,102
27231-5740 IC 74HC574 PIN IC6,106
27250-2000 IC MCU8 PIC16C55XTP IC3,103
28502-0010 RESONATOR CER 4MHZ XTAL1,101
35555-2870 PCB - CONTROL
23
PCB ASSEMBLY CONTROL (Version 1) EL302T (UNIQUE PARTS)
Part Number Description Position
22218-0213 SWITCH SLIDE 2P2W SW3
22573-0207 HEADER 7 WAY STRAIGHT .156P PJ2
23424-0443 CAP 10NZ 1KV CER D10 P5 C34
23557-0823 CAP 100U 16V LOW ESR P2.5 C138
23620-0246 CAP 100NK 63V P/E P5 C33
PCB ASSEMBLY CONTROL (Version 2) EL302D & EL302T (SURFACE MOUNT STAGE)
Part Number Description Position
23105-0000 RES SM0805 ZERO OHM R9,R16,R20,R109,R116,R120
23105-0100 RES SM0805 10R0F W1 R50,R150
23105-0220 RES SM0805 22R0F W1 R25,R125
23105-0560 RES SM0805 56R0F W1 R53-60,R153-160
23105-1100 RES SM0805 100RF W1 R40,R140
23105-1220 RES SM0805 220RF W1 R10,R110
23105-1470 RES SM0805 470RF W1 R45,R145
23105-1680 RES SM0805 680RF W1 R2,R102
23105-2100 RES SM0805 1K00F W1 R11-12,R23,R46,R48,R70-73,
R111-112,R123,R146,R148,R170-173
23105-2160 RES SM0805 1K60F W1 R135A,R35A
23105-2180 RES SM0805 1K80F W1 R41,R141
23105-2390 RES SM0805 3K90F W1 R34,R134
23105-2470 RES SM0805 4K70F W1 R38-39,R138-139
23105-2820 RES SM0805 8K20F W1 R18,R118
23105-3100 RES SM0805 10K0F W1 R24,R44,R124,R144
23105-3105 RES SM0805 10K5F W1 R47,R147
23105-3110 RES SM0805 11K0F W1 R51,R151
23105-3130 RES SM0805 13K0F W1 R35,R135
23105-3150 RES SM0805 15K0F W1 R33,R133
23105-3270 RES SM0805 27K0F W1 R27,R127
23105-3330 RES SM0805 33K0F W1 R6-8,R106-108
23105-3560 RES SM0805 56K0F W1 R31,R131
23105-3750 RES SM0805 75K0F W1 R3,R103
23105-4200 RES SM0805 200KF W1 R36-37,R136-137
23105-4470 RES SM0805 470KF W1 R29,R42,R129,R142
23105-5100 RES SM0805 1M00F W1 R19,R119
23105-6100 RES SM0805 10M0F W1 R13,R26,R113,R126
24
PCB ASSEMBLY CONTROL (Version 2) EL302D & EL302T (SURFACE MOUNT STAGE)/
continued...
Part Number Description Position
23106-3100 RES SM0805 10K0D W1 25PPM R4-5,R14-15,R17,R30,R32,R43,
R104-105,R114-115,R117,R130,
R132,R143
23106-3110 RES SM0805 11K0D W1 25PPM R28,R128
23405-0221 CAP SM0805 220P CER COG C19,C24,C119,C124
23405-0470 CAP SM0805 47P CER COG C15,C17,C29,C42,C68,C115,C117,C129
23405-0471 CAP SM0805 470P CER COG C32,C43,C132,C143
23461-0020 CAP SM0805 100NZ 50V CER Y5V C6,C27-28,C106,C127-128
25021-0010 DIO SM LL4148 SWITCHING D1-5,D7-8,D101-105,D107-108
25340-1000 TRAN SM PNP BC859C Q1,Q101
25377-1000 TRAN SM NPN BC849C Q2,Q102
27106-1160 IC SM LM324M OP AMP IC7,IC107
27106-1460 IC SM LF347M BIFET OP AMP IC5,IC105
27161-2030 IC SM V/REF ZRC250 2.5V 2% D6,D106
27227-0520 IC SM 4052 IC4,IC104
27227-0530 IC SM 4053 IC2,IC102
27239-5740 IC SM 74HC574 IC6,IC106
27250-2150 IC SM PIC16C55A-04/SO IC3,IC103
28502-1000 RESONATOR SM CSTCR4M00G53-R0 XTL1,XTL101
35555-4370 PCB - CONTROL - EL302D/T
PCB ASSEMBLY CONTROL (Version 2) EL302D & EL302T
Part Number Description Position
20661-0851 SPACER .56 INCH 7-SEG LED FOR DISP1,2,101,102
22225-0220 SWITCH PUSH/PUSH SPPH11470B SW1,SW101
22573-0210 HEADER 10 WAY STRAIGHT .156P PJ1,PJ101
23185-0000 RES ZERO OHM LK1
23202-1200 RES 200RF W60 MF 50PPM R22,R122
23202-4180 RES 180KF W60 MF 50PPM R1,R101
23320-0003 RES R10 - FERRYALLOY R21,R121
23347-0330 POT 10K LIN SPLINE SHAFT 25MM VR1-2,VR101-102
23347-0340 POT 10K LOG SPLINE SHAFT 25MM VR3,VR103
23377-2100 RES PS/H 1K0 CF 10MM VR4,VR9,VR104,VR109
23377-2220 RES PS/H 2K2 CF 10MM VR6,VR10,VR106,VR110
23377-2470 RES PS/H 4K7 CF 10MM VR5,VR105
23377-4100 RES PS/H 100K CF 10MM VR8,VR108
23379-1100 RES PS/H 100R CERMET 10MM VR7,VR107
25
PCB ASSEMBLY CONTROL (Version 2) EL302D & EL302T/continued...
Part Number Description Position
23424-0443 CAP 10NZ 1KV CER D10 P5 C30,C130
23557-0500 CAP 1U0 50V ELEC RC2 P1.5 C18,C23,C118,C123
23557-0512 CAP 220U 10V ELEC 7MM P2.5 C21,C121
23557-0513 CAP 10U 35V ELEC 7MM P2 C7,C107
23557-0612 CAP 1U0 100V/50V ELEC RE2 P2 C16,C37,C116,C137
23557-0647 CAP 10U 35V ELEC RE2 P2 C25-26,C125-126
23557-0825 CAP 100U 50V LOW ESR P3.5 C20,C120
23620-0246 CAP 100NK 63V P/E P5 C3,C8-9,C12,C31,C103,C108-109,
C112,C131
23620-0247 CAP 220NK 63V P/E P5 C1,C101
23620-0249 CAP 330NK 63V P/E P5 C10-11,C110-111
23620-9007 CAP 10NK 100V P/E P5 C13-14,C113-114
23685-0007 CAP 100NK 250V P/P MKP4 P10 C2,C102
25061-0200 LED - T1 ROUND (3mm) - RED LED1-2,LED101-102
25061-0519 DISPLAY 3 DIG .56 LED 9MM LEG DISP1-2,DISP101-102
25117-0020 DIO 1N5401 D10,D110
27164-0507 IC ULN-2003A IC1,IC101
PCB ASSEMBLY CONTROL (Version 3) SM STAGE - EL302D/Tv (44115-3081)
Part Number Description Position
23105-0000 RES SM0805 ZERO OHM R9, R16, R20, R109, R116, R120
23105-0100 RES SM0805 10R0F W1 R50, R150
23105-0220 RES SM0805 22R0F W1 R25, R125
23105-0560 RES SM0805 56R0F W1 R53-60, R153-160
23105-1100 RES SM0805 100RF W1 R40, R140
23105-1220 RES SM0805 220RF W1 R10, R110
23105-1470 RES SM0805 470RF W1 R45, R145
23105-1560 RES SM0805 560RF W1 R64
23105-1680 RES SM0805 680RF W1 R2, R102
23105-2100 RES SM0805 1K00F W1 R11-12, R23, R46, R48, R70-73,
R111-112, R123, R146, R148,
R170-173
23105-2110 RES SM0805 1K10F W1 R62
23105-2160 RES SM0805 1K60F W1 R135A, R35A
23105-2180 RES SM0805 1K80F W1 R41, R141
23105-2220 RES SM0805 2K20F W1 R61
23105-2330 RES SM0805 3K30F W1 R52
23105-2390 RES SM0805 3K90F W1 R34, R134
26
PCB ASSEMBLY CONTROL (Version 3) SM STAGE - EL302D/Tv (44115-3081)/continued..
Part Number Description Position
23105-2470 RES SM0805 4K70F W1 R38-39, R138-139
23105-2820 RES SM0805 8K20F W1 R18, R118
23105-3100 RES SM0805 10K0F W1 R24, R44, R124, R144
23105-3105 RES SM0805 10K5F W1 R47, R147
23105-3110 RES SM0805 11K0F W1 R51, R151
23105-3130 RES SM0805 13K0F W1 R35, R135
23105-3150 RES SM0805 15K0F W1 R33, R133
23105-3270 RES SM0805 27K0F W1 R27, R63, R127
23105-3330 RES SM0805 33K0F W1 R6-8, R106-108
23105-3560 RES SM0805 56K0F W1 R31, R131
23105-3750 RES SM0805 75K0F W1 R3, R103
23105-4200 RES SM0805 200KF W1 R36-37, R136-137
23105-4470 RES SM0805 470KF W1 R29, R42, R129, R142
23105-5100 RES SM0805 1M00F W1 R19, R119
23105-6100 RES SM0805 10M0F W1 R13, R26, R113, R126
23106-3100 RES SM0805 10K0D W1 25PPM R4-5, R14-15, R17, R30, R32, R43,
R104-105, R114-115, R117, R130,
R132, R143
23106-3110 RES SM0805 11K0D W1 25PPM R28, R128
23405-0221 CAP SM0805 220P CER COG C19, C24, C119, C124
23405-0470 CAP SM0805 47P CER COG C15,C17,C29,C42,C68,C115,C117,C129
23405-0471 CAP SM0805 470P CER COG C32, C43, C132, C143
23461-0020 CAP SM0805 100NZ 50V CER Y5V C6, C27-28, C106, C127-128
25021-0010 DIO SM LL4148 SWITCHING D1-5, D7-8, D101-105, D107-108
25340-1000 TRAN SM PNP BC859C Q1, Q101
25377-1000 TRAN SM NPN BC849C Q2, Q102
27106-1160 IC SM LM324M OP AMP IC7, IC107
27106-1460 IC SM LF347M BIFET OP AMP IC5, IC105
27161-2030 IC SM V/REF ZRC250 2.5V 2% D6, D106
27164-1070 IC SM ULN2003AD IC1, IC101
27227-0520 IC SM 4052 IC4, IC104
27227-0530 IC SM 4053 IC2, IC102
27239-5740 NC SM 74HC574 IC6, IC106
27250-2150 IC SM PIC16C55A-04/SO IC3, IC103
28502-1000 RESONATOR SM CSTCR4M00G53-R0 XTL1, XTL101
35555-4710 PCB - CONTROL - EL302D/TV
27
PCB ASSEMBLY CONTROL (Version 3) - EL302D/Tv (44115-3080)
Part Number Description Position
20661-0851 SPACER .56 INCH 7-SEG LED 3.5H FOR DISPLAYS
20661-0871 SPACER TOWER RND 4.8ODx12L BLK LED101-103
22219-0500 SWITCH 2 POLE MOMENTARY SW2
22225-0220 SWITCH PUSH/PUSH SPPH11470B SW1, SW101
22573-0208 HEADER 8 WAY STRAIGHT .156P PJ5
22573-0210 HEADER 10 WAY STRAIGHT .156P PJ1, PJ101
23202-1200 RES 200RF W60 MF 50PPM R22, R122
23202-4180 RES 180KF W60 MF 50PPM R1, R101
23320-0003 RES R10 - FERRYALLOY R21, R121
23347-0330 POT 10K LIN SPLINE SHAFT 25MM VR1-2, VR101-102
23347-0340 POT 10K LOG SPLINE SHAFT 25MM VR3