Sangean DPR-25+ User manual

DPR-25
DAB+FM RDS+MW DIGTAL RECEVIER
CONTENTS
Specification ………………………………………………………………………………………………………2-5
Block Diagram ………………………………………………………………………………………………………6
Alignment Instructions…………………………………………………………………………….………………7-11
Test Points Disgram…………………………………………………………………………….……….……………12
Main PCB Top View…………………………………………………………………………….……….……………13
Main PCB Bottom View.………………………………………………………………………….……..………..…..14
LCD PCB Top View……………………………………………………………………………….………….……15
LCD PCB Bottom View……………………………………………………………………………………………16
PCB Top View…………………………………………………………………………….……….……………17
PCB Bottom View…………………………………………………………………………….……….……………18
Wiring Diagram..….………………………………………….………………….….……………..……….19
Troubleshooting Flow Chart..….………………………………………….……………….….……………..……20-21
Electrical Parts List………………………………………………………………………………....……………22-25
Mechanical Parts List……………………………………………………………………….……….…………….26-27
Exploded Views.…………………………………………………………………………….…………….……………28
IC Circuit Block Diagram…………………………………………..…………….………………………………29-38
IC and Transistor Voltage Chart….……………………………..…………………………….…………………39-43
Semiconductor Lead Identifications……………………………………………………………………..……..…44
MAIN Schematic Diagram……………………………………………………………………………………………45
LCD Schematic Diagram………………………………………………………………..……………………..… …46

SPECIFICATION
FM. ELECTRICAL PERFORMANCE
Model: DPR-25 Brand:SANGEN Temp: °C R.H.: % Date: 2005/9/2
Condition Value Test no.
Test Item Input Output freq Nom. Lim 1. 2. Unit
Min 87.5
Tuning Range S/N=6dB Max 108 MHz
Intermediate freq. S/N=6dB 10.7 ±0.05 MHz
Max. Sensitivity S/N=6dB 90MHz 98MHz
106MHz
12
12
12
18
18
18 dBu
Usable Sensitivity S/N=30dB 90MHz
98MHz
106MHz
18
18
18
24
24
24 dBu
Image Rejection S/N=6dB 106MHz 24 18 dB
Stereo Ind Sens. S/N=6dB 106MHz 22 26 dB
I.F. Rejection S/N=6dB 90MHz 60 dB
3db Limiting 80dBu 18 24 dBu
Min. output 1.5 3 mV
Auto Scan 22 28 dBu
S/N (1mV) 46 40 dB
Current Consumption R. O. 160 180 mA
Am. Suppression (1mV) 32 26 dB
Stereo Separation(lkHz) 26 20 dB
100 200 Hz
Audio fidelity
75kHz/or 50kHz
(-3dB W/pre emphasis)
60dBu
10K 8K Hz
Output Power(75KHz dev.) 10%T.H.D. 1000 700 mW
T. H. D. (75KHz dev.) 1 3 %
Over load capacity 10%T. H.D.
98MHz
100 90 dBu
Calibration S/N=6dBu 90MHz 98MHz
106MHz KHz
Lowest Batt. Volt. 60dBu 98MHz 6.3 6.7 V
Supply Voltage: DC 9V R.O.: 50mW Load: 8 Ohm Modulation: 1KHz Mod./22.5KHz Dev.
Remark:
( )首件產品 ( )客戶抽測:
( )成品 ( )例行抽測 ( )業務樣品:
( )半成品( )新機種 ( )工程變更:
Approved by Released/Tested by
2

SPECIFICATION.
MW. ELECTRICAL PERFORMANCE
Model: DPR-25 Brand: SANGEAN Temp: °C R.H.: % Date: 2005/9/2
Condition Value Test no.
Test Item Input Output freq Nom. Lim 1. 2. Unit
Min 522
Tuning Range Max 1710 KHz
Intermediate freq. S/N=6dB Min 450 ±2 KHz
Max. Sensitivity S/N=6dB 603KHz 999KHz
1404KHz
46
42
42
56
54
54
dBu/m
Usable Sensitivity S/N=20dB 603KHz
999KHz
1404KHz
56
54
54
62
60
60
dBu/m
Image Rejection S/N=6dB 1404KHz 36 30 dB
I.F. Rejection S/N=6dB 603KHz 50 40 dB
Selectivity(±10KHz) S/N=6dB 32 26 dB
Bandwidth(-6dB) S/N=6dB 6-11 KHz
T. H. D. 74dBu/m 2 4 %
Lowest Batt. Volt. 74dBu/m 6.3 6.7 V
Hum Modulation 100dBu/m dB
Auto. Scan. Stop. Sens. 56 62 dBu/m
Current Consumption 74dBu/m 160 180 mA
Tone Action (3KHz) 74dBu/m dB
100 200 Hz
Freq. Response
(-6dB) 74dBu/m 2500 1800 Hz
Output Power 80% Mod. 10%T.H.D. 1000 700 mW
Over load capacity 80%mod. 10%T. H.D. 100 90 dBu/m
A. G. C. F. O. M. 100dBu/m
999KHz
46 40 dB
S/N Ration 74dBu/m 40 34 dB
Whistle Modulation 74dBu/m 2IF/3IF 15 %
Supply Voltage: DC 9 V R.O.: 50mW Load: 8 Ohm Modulation: 1KHz/30% Mod
Remark:
( )首件產品 ( )客戶抽測:
( )成品 ( )例行抽測 ( )業務樣品:
( )半成品( )新機種 ( )工程變更:
Approved by Released/Tested by
3

SPECIFICATION.
DAB(BAND
Ⅲ) ELECTRICAL PERFORMANCE
Model: DPR-25 Brand: SANGEAN Temp: °C R.H.: % Date: 2005/9/2
Test no.
Test Item Condition CH Limit Typical 1. 2. Unit
Min 5A CH
RF Freq. Range Max 13F CH
Ad
j
acent Channel
Selectivity
Fc : -70 dBm (Wanted channel)
Fi : ≧-38 dBm
(Unwantedchannel)
(Measurement to EN50248)
10A 30 33 dB
Far-off Selectivity
Fc : -70 dBm (Wanted channel)
Fi : ≧-25 dBm
FM 75Khz/dev. Fc ±5MHz
(Unwantedchannel)
(Measurement to EN50248)
10A 43 53 dB
5A -87 -90 dBm
10A -88 -91 dBm
12B -88 -91 dBm
Sensitivity
Without pop noise
13F -87 -90 dBm
S/N Ratio Without pop noise 10A 50 56 dB
Max. input Signal : Without pop noise 10A -10 0 dBm
5A -90 -92 dBm
10A -92 -94 dBm
12B -92 -94 dBm
Acquisition
Selectivity (Measurement to EN50248)
13F -90 -92 dBm
Output Power
1kHz 10%T.H.D. 1000 700 mW
T. H. D. 1 3 %
Low battery
Indication on 10A 6.7 6.7 V
125H
Z +4 +7 dB
FREQ
RESPONSE AT CHANNEL 10A CHANGE SERVICE AF 8KHZ +4 +7 dB
Supply Voltage：
DC：9V R.O. : 50mW Load: 8 Ohm Modulation :1kHz
Channel Freq.( MHz) Channel Freq.( MHz) Channel Freq.( MHz)
5A 174.928 10A 209.936 12B 225.648
13F 239.200
( )The head of product
( )Finished Product
( )Semi-finished Product
( )New Model
( )Client Spot Check
( )Routine Spot Check
( )Engineering Modify
( )Business Sample
Approved by Released/Tested by
4

SPECIFICTION.
AUX-IN ELECTRICAL PERFORMANCE
Model: DPR-25 Brand: ALL Temp: 25 ℃R. H. : 75 % Date: 2005/9/2
Condition Value Test No.
Test Item Input Output Freq. Nom. Lim. 1. 2. Unit
Output Power AUX IN=0.5V/1KHz
THD=10% 1 0.7 W
AUX IN
Dynamic Range
Output=R.0 (ATT=0)
THD=3%
AUX IN=100Hz 1 05 V
I/S (Input Sensitivity) AUX IX=100Hz，ATT=0
OUT= 0.5W
Volume=MAX 130 ±30 mV
DISTORTION AUX IN =I/S 1KHz
OUT=R.O 0.1 0.4 %
MIN OUTPUT AUX IN =I/S 1KHz
Volume=MIN 0.7 2
mV
S/N RATIO AUX IN =I/S 1KHz&GND
OUT=R.O 65 55 dB
100 10 6
Frequency Response AUX
IN=0.5V/1KHz
OUT=50mW=0dB 10K 8 4
dB
AUX IN =I/S 1KHz 130 ±30
LINE OUT LEVEL
(REC OUT IMPD=47K) FM DEV=22.5K@1KHz 150/ ±30 mV
Supply Voltage: DC 9 V R.O.: 50mW Load: 8 Ohm Modulation:
1KHz/30% Mod
Remark:
( )首件產品 ( )客戶抽測:
( )成品 ( )例行抽測 ( )業務樣品:
( )半成品( )新機種 ( )工程變更:
Approved by Released/Tested by
5

KEY
DC JACK 9-14V
Q22 Q19 9V
REG.
3D PT2386
DAB
Q15 Q17
5V REG.
Q10 Q27
6V REG
Q5 Q6
AUX
SW TC4066
Tuner TA2149
Q4 Q23
Pre-AMP
FLIP-FLIP TC4013
u-COM TMP87EP26F
3DSW LINE
OUT
DC / DC 5V
DC / DC 3.3V
RDS BU1924
DC / DC 15V
Main-AMP AN7142
POWKEY
PLL & LPF TC9257
BLOCK DIAGRAM
6

1. ALIGNMENT FOR AM/LW IF
a. Required Instruments:
AM IF Sweep Generator with scope
b. Alignment Procedure
Mode Adjustment Procedure
(1) Press the power button to turn on the radio.
(2) Connect the input terminal of AM IF sweep generator in series with a resistor of 1.2KΩ
to the TP1 and TP2.
(3) Connect the RF output terminal of AM IF sweep generator to another test point TP5.
(4) Connect a 100μF electrolytic capacitor to test point TP2 and TP4.
(5) Adjust T1 to have a max. output with a marker frequency of 450 kHz on the sweep
AM T1
scope.
c. Instrument Connection
T1
TP4 TP2
100uF
IN
TP1 RF TP5
TP2
OUT
450KHz Marker
1.2KΩ2.2KΩ
AM IF Sweep Generator
ALIGNMENT INSTRUCTIONS
7

2. ALIGNMENT FOR AM/LW TUNING VOLTAGE RANGE
a. Required Instruments:
DVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on the radio.
(2) Connect the probe of DVM to the test point TP1 and TP2.
(3) Tune the AM frequency to 522 kHz.
(4) Adjust L3 to have a reading of 1.2 ±0.04V.
(5) Tune the AM frequency to 1629 kHz.
AM
L3
TC1
(6) Adjust TC1 to have a reading of 7.6 ±0.3V.
c. Instrument Connection
TC1 L3
TP2
TP1
DVM
8

3. ALIGNMENT FOR FM TUNING VOLTAGE
a. Required Instruments
DVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on the radio.
(2) Connect the probe of DVM to the TP1 and TP2
(3) Tune the FM frequency to 108MHz.
FM L4
(4) Adjust L4 to have a reading of 8.2V ±0.3V.
c. Instrument Connection
L4
TP2
TP1
DVM
9

4. ALIGNMENT FOR AM/LW SENSITIVITY
a. Required Instruments
AM Signal Generator
SSVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on the radio.
(2) Connect a SSVM to the speaker TP7 and TP8 terminals.
(3) Connect an AM signal generator together with standard loop dummy antenna and
feed 30% modulated signal to the AM ferrite bar antenna L12.
(4) Tune the generator frequency to 1404 kHz.
(5) Tune the AM frequency to 1404 kHz and adjust TC3 to have a max reading on
SSVM.
(6) Return the generator frequency to 603 kHz.
(7) Tune the AM frequency to 603 kHz and adjust L12 to have a max reading on
SSVM.
AM
TC3
L12
(8) Repeat (4) to (7) as necessary to minimize tracking error.
c. Instrument Connection
L12
TC3
60 cm
The radio is located
perpendicularly to
the Loop Antenna
Loop Antenna
AM Signal Generator
TP8
TP7
DVM
10

5. ALIGNMENT FOR FM TUNING SENSITIVITY
a. Required Instruments
FM Signal Generator (frequency range up to 220 MHz)
SSVM
b. Alignment Procedure
Mode Adjustment Procedure
(1) Turn on radio.
(2) Connect a SSVM to speaker TP7 and TP8.
(3) Connect a FM signal generator to TP10 and TP11.
(4) Set the signal generator to 22.5 kHz deviation with 1 kHz modulation.
(5) Always tune the generator frequency to exactly same as the radio band frequency
before adjustment.
(6) Tune the FM frequency to 106MHz and adjust TC2 to have a max audio output.
(7) Tune the FM frequency to 90MHz and adjust L8 to have a max audio output.
FM
TC2
L8
(8) Repeat (6) to (7) as necessary to minimize tracking error.
c. Instrument Connection
L8
TC2
TP11
TP10
SSG
TP8
TP7
DVM
11

TEST POINTS DIAGRAM
12

MAIN PCB TOP VIEW
13

MAIN PCB BOTTOM VIEW
14

LCD PCB TOP VIEW
15

LCD PCB BOTTOM VIEW
16

PCB TOP VIEW
17

PCB BOTTOM VIEW
18

WIRING DIAGRAM
19

( 1 ) DAB can not be turned on
No Check the IC10 and Q14 circuit is
normal.
Check whether the pin 18 of DAB
MODULE
exceeds 3.3V DC. Then replace the abnormal parts.
Yes
No Check the IC13 and Q25 circuit is
normal.
Check whether the pin1 of DAB
MODULE exceeds 5V DC.
Then replace the abnormal parts.
( 2 ) Weak sensitivity in DAB band
No
Check the C134, C135, L10, L11
circuit is normal.
Check the HPF circuit.
Then replace the abnormal parts.
Yes
Check the ANT circuit is normal.
TROUBLESHOOTING FLOW CHART
20