Rigol DP1308A User manual

RIGOL
Service Guide
DP1308A Programmable
Linear DC Power Supply
Feb. 2012
RIGOL Technologies, Inc.

RIGOL
DP1308A Service Guide
I
Guaranty and Declaration
Copyright
© 2012 RIGOL Technologies, Inc. All Rights Reserved.
Trademark Information
RIGOL is a registered trademark of RIGOL Technologies, Inc.
Publication Number
SGH01100-1110
Notices
RIGOL products are protected by patent law in and outside of P.R.C.
RIGOL reserves the right to modify or change parts of or all the specifications
and pricing policies at company’s sole decision.
Information in this publication replaces all previously corresponding material.
RIGOL shall not be liable for losses caused by either incidental or consequential
in connection with the furnishing, use or performance of this manual as well as
any information contained.
Any part of this document is forbidden to be copied or photocopied or rearranged
without prior written approval of RIGOL.
Product Certification
RIGOL guarantees this product conforms to the national and industrial standards in
China. International standard conformance certification is in progress, e.g. ISO.
Contact Us
If you have any problem or requirement when using our products, please contact
RIGOL Technologies, Inc. or your local distributors, or visit: www.rigol.com.

RIGOL
DP1308A Service Guide
II
Safety Requirement
General Safety Summary
Please review the following safety precautions carefully before putting the instrument
into operation so as to avoid any personal injuries or damages to the instrument and
any product connected to it. To prevent potential hazards, please use the instrument
only specified by this manual.
Use Proper Power Cord.
Only the power cord designed for the instrument and authorized by local country
could be used.
Ground The Instrument.
The instrument is grounded through the Protective Earth lead of the power cord. To
avoid electric shock, it is essential to connect the earth terminal of power cord to the
Protective Earth terminal before any inputs or outputs.
Observe All Terminal Ratings.
To avoid fire or shock hazard, observe all ratings and markers on the instrument and
check your manual for more information about ratings before connecting.
Use Proper Overvoltage Protection.
Make sure that no overvoltage (such as that caused by a thunderstorm) can reach the
product, or else the operator might expose to danger of electrical shock.
Do Not Operate Without Covers.
Do not operate the instrument with covers or panels removed.
Use Proper Fuse.
Please use the specified fuses.
Avoid Circuit or Wire Exposure.
Do not touch exposed junctions and components when the unit is powered.
Do Not Operate With Suspected Failures.
If you suspect damage occurs to the instrument, have it inspected by qualified service
personnel before further operations. Any maintenance, adjustment or replacement
especially to circuits or accessories must be performed by RIGOL authorized
personnel.
Keep Well Ventilation.
Inadequate ventilation may cause increasing of temperature or damages to the device.
So please keep well ventilated and inspect the intake and fan regularly.

RIGOL
DP1308A Service Guide
III
Do Not Operate in Wet Conditions.
In order to avoid short circuiting to the interior of the device or electric shock, please
do not operate in a humid environment.
Do Not Operate in an Explosive Atmosphere.
In order to avoid damages to the device or personal injuries, it is important to operate
the device away from an explosive atmosphere.
Keep Product Surfaces Clean and Dry.
To avoid the influence of dust and/or moisture in air, please keep the surface of device
clean and dry.
Electrostatic Prevention.
Operate in an electrostatic discharge protective area environment to avoid damages
induced by static discharges. Always ground both the internal and external conductors
of the cable to release static before connecting.
Handling Safety
Please handle with care during transportation to avoid damages to buttons, knob
interfaces and other parts on the panels.

RIGOL
DP1308A Service Guide
IV
Safety Terms and Symbols
Terms in this Manual. These terms may appear in this manual:
WARNING
Warning statements indicate the conditions or practices that could result in
injury or loss of life.
CAUTION
Caution statements indicate the conditions or practices that could result in
damage to this product or other property.
Terms on the Product. These terms may appear on the Product:
DANGER
indicates an injury or hazard may immediately happen.
WARNING
indicates an injury or hazard may be accessible potentially.
CAUTION
indicates a potential damage to the instrument or other property might
occur.
Symbols on the Product. These symbols may appear on the product:
Hazardous
Voltage
Please Refer to
Manuals
Protective
Earth
Terminal
Chassis
Ground
Test
Ground

RIGOL
DP1308A Service Guide
V
DP1308A Overview
DP1308A programmable linear DC power supply is designed with high performance
and 80W triple-output. Configured with clear user interface, excellent specifications
and multiple standard interfaces, DP1308A can fulfill diversified testing demands.
Main Features:
4.3 inch, 16M true color TFT LCD;
Individual and controllable triple-channel output with up to 80 W total power;
Low ripples noise, the output noise and ripples <350μVrms/2mVpp;
Excellent linear regulation rate: <0.01%+2mV (voltage), <0.01%+250μA
(current);
Excellent load regulation rate: <0.01%+2mV (voltage), <0.01%+250μA
(current);
Overvoltage/overcurrent protection function. Implement effective protection for
loads by setting the overvoltage and overcurrent parameters;
Two-level overtemperature protection;
Enable to set the parameters of the store and recall system;
Timing output;
Waveform display: real-time display of output voltage/current waveform, which,
in combination with the digital display of the voltage, current and power, clearly
shows the output state of the instrument;
Standard interfaces: USB Device, USB Host, LAN and GPIB;
Support USB storage device storage;
Support remote control via Web;
Support remote control via commands;
Conform to LXI-C class instrument standard;
One-key help function;
Support Chinese & English interface and input method.

RIGOL
DP1308A Service Guide
VI
Document Overview
Chapter 1 Specifications
List the specifications of DP1308A programmable linear DC power supply.
Chapter 2 Quick Start
Guide you to quickly understand the using method of DP1308A by introducing the
panels, user interface, preparations before use as well as the using method of the rack
mount kit.
Chapter 3 To Acquire Calibration Service
Introduce how to acquire DP1308A calibration service.
Chapter 4 Disassemble and Assemble
Introduce how to disassemble and assemble DP1308A to give you a much clearer
understanding of the structure of the instrument.
Chapter 5 Troubleshooting&Maintenance
List the failures that might occur when using the instrument as well as their solutions.
Besides, maintenance information is also introduced.

RIGOL
DP1308A Service Guide
VII
Contents
Guaranty and Declaration .......................................................................... I
Safety Requirement ..................................................................................II
General Safety Summary............................................................................ II
Safety Terms and Symbols .........................................................................IV
DP1308A Overview ....................................................................................V
Document Overview................................................................................. VI
Chapter 1 Specifications...................................................................... 1-1
Chapter 2 Quick Start .......................................................................... 2-1
General Inspection .................................................................................. 2-2
Front/Rear Panel and User Interface.......................................................... 2-3
Front Panel ...................................................................................... 2-3
Rear Panel ....................................................................................... 2-5
User Interface .................................................................................. 2-6
First Use of DP1308A............................................................................... 2-7
Power Requirement........................................................................... 2-7
Power-on Inspection ......................................................................... 2-7
Output Inspection ............................................................................. 2-8
To Use the Rack Mount Kit ..................................................................... 2-10
Kit Parts List................................................................................... 2-10
Installation Space ........................................................................... 2-11
Installation Tool .............................................................................. 2-12
Installation Procedures .................................................................... 2-13
Installation Notice........................................................................... 2-17
Chapter 3 To Acquire Calibration Service............................................. 3-1
Calibration Interval .................................................................................. 3-1
Calibration Notice .................................................................................... 3-1
How to Acquire Calibration Service............................................................ 3-1
Chapter 4 Disassemble and Assemble ................................................. 4-1
Disassemble/Assemble Notices ................................................................. 4-1
Outside View Drawing of the Instrument ................................................... 4-2
Disassemble/Assemble the Front and Rear Rubber Covers ........................... 4-3
Disassemble/Assemble the Rear Cover ...................................................... 4-4
Disassenble/Assemble the Metal Body ....................................................... 4-5
Disassemble/Assemble the Up Panel of the Analog Circuit ........................... 4-6
Disassemble/Assemble the Bottom Panel of the Analog Circuit ..................... 4-7
Disassemble/Assemble the Front Panel ...................................................... 4-8
Disassemble/Assemble the Keyboard......................................................... 4-9
Disassemble/Assemble the Power Frequency Transformer ......................... 4-10
Disassemble/Assemble the Fuse Seat and Fan.......................................... 4-11
Disassemble/Assemble the GPIB Board.................................................... 4-12

RIGOL
DP1308A Service Guide
VIII
Disassemble/Assemble the Digital Circiut Board ........................................ 4-13
Chapter 5 Troubleshooting&Maintenance............................................ 5-1
Troubleshooting.......................................................................................5-1
Maintenance............................................................................................5-2
System Maintenance..........................................................................5-2
Warranty ..........................................................................................5-3
General Care and Cleaning .................................................................5-4

Chapter 1 Specifications RIGOL
DP1308A Service Guide
1-1
Chapter 1 Specifications
The following parameters can only be guaranteed when the instrument has been
operating continuously for more than 30 minutes under the specified operation
temperature.
Note: all the parameters are applicable for the outputs of the three channels unless
otherwise noted.
Model
DP1308A
Channel
+6V
+25V
-25V
DC output (0℃to 40℃)
Voltage
0 to +6V
0 to +25V
0 to -25V
Current
0 to 5A
0 to 1A
0 to 1A
Overvoltage Protection
0.1V to 6.5V
0.1V to 27V
-0.1V to -27V
Overcurrent Protection
0.1A to 5.5A
0.1A to 1.2A
0.1A to 1.2A
Load Regulation Rate ± (output percentage + offset)
Voltage
<0.01%+2mV
Current
<0.01%+250μA
Linear Regulation Rate ± (output percentage + offset)
Voltage
<0.01%+2mV
Current
<0.01%+250μA
Ripple and Noise (20 Hz to 20 MHz)
Normal Mode Voltage
<350μVrms/2mVpp
Normal Mode Current
<2mArms
<500μArms
Common Mode Current
<1.5μArms
Annual Accuracy [1] (25℃±5℃)± (output percentage + offset)
Programming
Voltage
0.1%+5mV
0.05%+20mV
Current
0.2%+10mA
0.15%+4mA
Read Back
Voltage
0.1%+5mV
0.05%+10mV
Current
0.2%+10mA
0.15%+4mA
Resolution
Programming
0.5mV/0.5mA
1.5mV/0.1mA
Read Back
0.5mV/0.5mA
1.5mV/0.1mA
Meter
1mV/1mA
10mV/1mA
Transient Response Time
The time needed for the output current to change from full load to half load or from
half to full and for the output voltage to be within 15mV is less than 50μs.
Command Processing Time[2]
<50ms
Temperature Coefficient per ℃(output percentage + offset)
Voltage
0.01%+2mV
0.01%+3mV
Current
0.02%+3mA
0.01%+0.5mA
Stability[3] ± (output percentage + offset)

RIGOL Chapter 1 Specifications
DP1308A Service Guide
1-2
Voltage
0.03%+1mV
0.02%+2mV
Current
0.1%+3mA
0.05%+1mA
Voltage Programming Speed (within 1% of total variation range)
Rising
Full
Load
11ms
50ms
No Load
10ms
45ms
Falling
Full
Load
13ms
20ms
No Load
200ms
400ms
OVP/OCP
Accuracy ± (output
percentage + offset)
0.5%+0.5V/0.5%+0.5A
Activation Time
1.5ms (OVP ≥3V)
<10ms (OVP <3V and OCP)
Machenical
Dimension
235 mm (W) x 155 mm (H) x 384 mm (D)
Weight
8.5 kg
Power Supply
AC Output
(50Hz to 60Hz)
100Vac+10%, 115Vac+10%, 220Vac+10%,
230Vac+10% (250VAC Max)
Environment
Working Temperature
Full rated output: 0℃to 40℃
At higher temperature: the linearity of the output
current falls to 50% at the maximum temperature 55℃
Cooling Method
Fan cooling
Remarks:
[1] Specifications are for one hour warm-up at 25℃.
[2] The maximum time required for regulating corresponding output after receiving the APPLy and
SOURce commands.
[3] The variation of the output within 8 hours after the instrument is warmed up for 30 minutes
and both the load circuit and environment temperatures are constant.

Chapter 2 Quick Start RIGOL
DP1308A Service Guide
2-1
Chapter 2 Quick Start
Subjects in this chapter:
General Inspection
Front/Rear Panel and User Interface
Front Panel
Rear Panel
User Interface
First Use of DP1308A
Power Requirement
Power-on Inspection
Output Inspection
To Use the Rack Mount Kit
Kit Parts List
Installation Space
Installation Tool
Installation Procedures
Installation Notice

RIGOL Chapter 2 Quick Start
DP1308A Service Guide
2-2
General Inspection
1．Inspect the shipping container for damage
Keep the damaged shipping container or cushioning material until the contents of
the shipment have been checked for completeness and the instrument has
passed both electrical and mechanical tests.
The consigner or carrier shall be liable for the damage to instrument resulting
from shipment. RIGOL would not be responsible for free maintenance/rework or
replacement of the unit.
2．Inspect the instrument
In case of any damage, or defect, or failure, notify your RIGOL sales
representative.
3．Check the accessories
Please check the accessories according to the packing lists. If the accessories are
incomplete or damaged, please contact your RIGOL sales representative.

Chapter 2 Quick Start RIGOL
DP1308A Service Guide
2-3
Front/Rear Panel and User Interface
Front Panel
Figure 2-1 DP1308A Front Panel
①①
LCD
Display the user interface
②
Parameter Input
Area
Include the numeric keyboard, the unit keys
(direction keys) and the OK key
③
Power Key
The instrument enters (or exits) working state
④
USB Host
Connect the instrument (host device) with external
USB devices
⑤
Menu Softkeys
Different menus represent different functions
⑥
Display Mode
Switch Key
Switch between general and focus display modes
⑦
Channel Setting
Keys
Switch among channels; enable/disable the channel
output
⑧
Output
Terminals
Channel output connectors
⑨
Advanced
Function Area
Wave Disp: display the output signal via waveform
Store/Recall: store and recall the instrument
setting; file management
Timer: enable the timing output
Utility: set the system-related configurations
V
mV
mA A
Programmable DC Power Supply
③④⑤⑥⑦⑧⑨
①②

RIGOL Chapter 2 Quick Start
DP1308A Service Guide
2-4
Track: enable the track function
Help: system online help
1. Key Indicators
The key will be illuminated when you press the power key and the
instrument enters working state.
On/Off The corresponding key will be illuminated when the channel is enabled.
Wave Disp The key will be illuminated when waveform display is enabled.
Timer The key will be illuminated when the timing output function is enabled.
Track The key will be illuminated when the track function is enabled.
Store/Recall The key will be illuminated when the instrument enters the store
and recall menu.
Utility The key will be illuminated when the instrument enters system setting.
Help The key will be illuminated when the online help is enabled.
2. Front Panel Connectors
①②③④
①
USB Host: connect the instrument (host device) with external USB
devices, such as USB storage device
②
Output terminals of +6V channel
③
This terminal is connected with the chassis and ground wire and is
grounded when the instrument is powered on. You can directly connect
other electric devices to this terminal to ground them.
④*
Ouput terminals of ± 25V channel
Remark*: COM is a common terminal.

Chapter 2 Quick Start RIGOL
DP1308A Service Guide
2-5
Rear Panel
Figure 2-2 DP1308A Rear Panel
①
GPIB Interface
Conform to IEEE 488.2 protocol
②
Fan
Air outlet of the fan
③
Power Hub
AC input interface
④
Power Voltage
Selector
Select the proper scale according to the input
power voltage
⑤
LAN Interface
Connect to the local area network via the RJ45
interface
⑥
USB Device
Connect the instrument (slave device) with
external USB devices
⑦
Fuse
Provide two specifications: 250V, T3A and 250V,
T2A
⑧
Power Switch
Connect or disconnect the instrument to power
⑤⑥⑦⑧
①②③④

RIGOL Chapter 2 Quick Start
DP1308A Service Guide
2-6
User Interface
Figure 2-3 DP1308A User Interface
(1)
Channel Output Status
(13)
Ouput Voltage
(2)
Channel Label
(14)
Output Current
(3)
Current Channel*
(15)
Output Power
(4)
Constant Voltage Output
(16)
O.V.P Input Box
(5)
LAN Connection Label
(17)
O.C.P Input Box
(6)
Keylock Label
(18)
Operation Menu
(7)
Self-test Failed
(19)
Timing Output Label
(8)
O.T.P Label
(20)
Timing Output Time
(9)
Remote Control
Connection
(21)
Voltage Input Box
(10)
USB storage device is
detected
(22)
Current Input Box
(11)
Help Information
(23)
Track Label
(12)
System sound is enabled
(24)
O.V.P/O.C.P Status
Remark*: the current channel is highlighted on the screen.
(18) (19) (20) (21) (22) (23) (24)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)
(13)
(14)
(15)
(16)
(17)

Chapter 2 Quick Start RIGOL
DP1308A Service Guide
2-7
First Use of DP1308A
Make necessary inspections before using DP1308A to make sure that the instrument
can work normally
Power Requirement
DP1308A can accept four kinds of AC power supplies (100 V, 115 V, 220 V and 230 V)
with 50 Hz to 60 Hz frequency. You can select the desired input power using the
“power voltage selector”at the rear panel.
WARNING
Make sure that the power supply has been cut off and the instrument has
been installed with the specified fuse before switching the power.
Power-on Inspection
Please use the power cord supplied in the accessories to connect the instrument to AC
power. Then, follow the step below to perform power-on inspection.
1. Power on the instrument
Turn on the switch under the power hub at the rear panel. At this point, the
instrument is powered on.
WARNING
To avoid electric shock, make sure that the instrument is properly
grounded.
2. Turn on the power key
Press the power key at the front panel. The instrument starts up and
performs self-test. If the instrument passes the self-test, the user interface will be
displayed. Otherwise, “System power-on self-test has a mistake, view the error or
not?”will be displayed; at this point, press OK to get more information about the
self-test, or press Cancel to exit the prompt message.

RIGOL Chapter 2 Quick Start
DP1308A Service Guide
2-8
Output Inspection
The output inspection ensures that the instrument can respond to the front panel
operations properly and output the rated values. The output inspection mainly
consists of the voltage output with no load and the current output at short circuit of
each channel.
1. Channel selection and output switch
Press the channel selection key to select the corresponding output channel. The
channel currently selected is highlighted on the screen.
Figure 2-4 Output Channel Selection
Pressing the On/Off key under the channel selection key can enable or disable
the corresponding channel output no matter whether the channel is currently
selected. The key light turns on when the channel output is enabled and turns off
when the channel output is disabled.
2. Voltage Output Inspection
(1) Set the instrument to no load mode. Press and make sure that the
current setting value of each channel is not 0.
(2) Inspect the channel “All On”and “All Off”.
Press All On and prompt message is displayed to ask you whether to
enable the outputs of all the three channels. If yes, the On/Off key
corresponding to each channel will be illuminated and all the channels
will be in output mode; otherwise, the instrument will return back to the
original state.
Press All Off to disable the outputs of all the three channels and the key
light of the On/Off key corresponding to each channel turns off.
(3) Inspect the voltage function of +6 V channel.
Press +6V and the corresponding On/Off key. The On/Off key is
illuminated and the channel is in constant voltage output state. Inspect
whether the voltage can be adjusted from 0 to the maximum rated value (6.3
V).