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SERVICE MANUAL
FM/MW/LW/RDS CD Receiver
TO ALPINE Home Page
11 / 03-A
68E36125S01
CDM-9825RB
The following cautions will prevent accidents in the workplace and will ensure safe products.
*The symbols indicate caution is needed to prevent injuries and damage to property.
The symbols and their meanings follow.
If you ignore this symbol and handle the product incorrectly or unsafely,
Warning serious injury or death may result.
If you ignore this symbol and handle the product incorrectly or unsafely,
Caution injury or only material damage may result.
*The following symbols indicate two levels of cautions.
When you see this symbol, you have to be very careful.
When you see this symbol, you have to follow the instructions there.
Warning
Do not look squarely into the laser light Fuse Caution
coming from the pickup. Always use a designated fuse.
You may loose you sight. Use of an incorrect fuse may result in a fire.
Caution
Do not allow wiring to be caught in the Battery Caution
screw/chassis. Use the designated battery.
If wiring is caught in the screw/chassis, it may Confirm the correct polarity and seat of the
cause a short circuit, resulting in a fire. battery.
An incorrect battery or an improperly connected
or seated battery may result in a fire.
High Temperature Caution Designated Parts Caution
Touching the heat sink may cause severe burns. Look up the part list and ensure that only
designated parts are used to prevent problems or
accidents.
Reverse Power Supply Connections or Wiring Caution
Misconnections Caution Ensure that the wiring is correct when rewiring to
Reverse power supply connections or prevent problems with ignition/breakdown.
misconnections may cause ignition problems and
smoke may result.
Soldering Caution Wear Gloves
Hot solder from solder splash may cause severe Wear gloves to prevent electrical shocks or injury
burns. from the end face of the metal.
-2-
CDM-9825RB
Contents
Packing Assembly Parts List 4
Packing Method View 4
Specifications 5,6
Adjustment Procedures 7 to 9
Extension Cable 10
Block Diagram 11
Parts Layout on P.W.Boards and Wiring Diagram 12 to 15
Schematic Diagram 16 to 22
Terminal Voltage of IC/ TR 23 to 28
Description of IC Terminal 29 to 31
Exploded View (Cabinet) 32
Exploded View (CD Deck Mechanism) (DP23S2AO) 33
NOTE : Due to continuing product improvement, specifications and designs are subject to
change without notice.
-3-
CDM-9825RB
Packing Assembly Parts List
Symbol Part No. Description Symbol Part No. Description
No. No.
101-1 03S60820Y16 SCR,MCH 5X8 ZN A 102 15D00529K02 CASE,INNER
101-2 36A02449K01 CAP,RUBBER(A) 103 15D01798K03 CARRYING,CASE
101-3 01T04296K01 ISO/JASO ANT ADAPTER 104 01T75373Y02 ASSY,ISO CONN 9825R
101-4 03A60836Y01 SCR,CUS 5X7 ZN A 105 68P02294K90 O/M AOEU AODN
Packing Method View
101 -1 101 -2
X4
X1
BO
T
SID TOM
105 E
101 -3 101 -4
104
101
X1 X1
103
102
X1
BO
TT 103
SID OM
E
102
X1
104
X1
TO CONTENTS
-4-
CDM-9825RB
Specifications
Intermediate Frequency ................................................................................................................................ 10.7MHz
Frequency Range ............................................................................................................................ 87.5 to 108.0MHz
Usable Sensitivity (30 S/N, Mono, at 98.1MHz) .............................................................................................. 20.2dBf
-3dB Limiting Sensitivity (at 98.1MHz) ............................................................................................................ 20.2dBf
Residual Noise (Ref. 400Hz(WID), at 98.1MHz) ............................................................................................ 25±10dB
S/N Ratio (at 98.1MHz) ......................................................................................................................... Stereo : 50dB
Mono : 55dB
Image Rejection (at 106.1MHz) .......................................................................................................................... 40dB
IF Rejection (at 90.1MHz) ................................................................................................................................... 60dB
Distortion (Input 60dBu, at 98.1MHz) .................................................................................................................. 1.0%
Frequency Response (Ref. 400Hz, at 98.1MHz) ................................................................................. 100Hz : 0±3dB
10kHz : -12±3dB
Stereo Separation (1kHz, at 98.1MHz) ............................................................................................................... 20dB
PS Sensitivity (at 98.1MHz) ............................................................................................................................ 36.2dBf
Intermediate Frequency ........................................................................................................................ 1st : 10.7MHz
2nd : 450kHz
Frequency Range .............................................................................................................................. 531 to 1,602kHz
Usable Sensitivity (20dB S/N, at 999kHz) ........................................................................................................... 34dB
S/N Ratio (at 999kHz) ......................................................................................................................................... 44dB
Image Rejection (at 603kHz) ............................................................................................................................... 40dB
IF Rejection (at 603kHz) ..................................................................................................................................... 50dB
Distortion (at 999kHz) .......................................................................................................................................... 1.5%
Frequency Response (Ref. 400Hz, at 999kHz) .................................................................................. 100Hz : -3±4dB
4kHz : -12+4, -8dB
Intermediate Frequency ........................................................................................................................ 1st : 10.7MHz
2nd : 450kHz
Frequency Range .................................................................................................................................. 153 to 281kHz
Usable Sensitivity (20dB S/N, at 216kHz) ........................................................................................................... 38dB
S/N Ratio (at 216kHz) ......................................................................................................................................... 45dB
Image Rejection (at 270kHz) ............................................................................................................................... 40dB
IF Rejection (at 162kHz) ..................................................................................................................................... 50dB
Distortion (at 216kHz) .......................................................................................................................................... 1.5%
Frequency Response (Ref. 400Hz, at 216kHz) .................................................................................. 100Hz : -3±4dB
4kHz : -12+4, -8dB
Wave Length .................................................................................................................................................... 795nm
Laser Power ................................................................................................................................................... CLASS I
TO CONTENTS
-5-
CDM-9825RB
System ....................................................................................................................... Optical (Compact Disc System)
Channel Balance (1kHz, TCD-782) ................................................................................................................... 0±3dB
Distortion (1kHz, TCD-782) ................................................................................................................................. 0.1%
Frequency Response (Ref. 1kHz, TCD-782) ......................................................................................... 17Hz : 0±3dB
127Hz : 0±2dB
10.007kHz : 0±2dB
19.997kHz : 0±4dB
S/N Ratio (TCD-782) ........................................................................................................................................... 95dB
Separation (1kHz, TCD-782) ............................................................................................................................... 55dB
De-Emphasis (Ref. 1kHz, TCD-782) .................................................................................................. 4kHz : -20±3dB
16kHz : -20±3dB
Power Supply ................................................................................................................................................ DC14.4V
Power Output (Ref. FM Mode, SP-OUT, T.H.D. 10%) /Impedance ...................................................... 16W/ch/4ohm
Pre Output (Ref. TCD-782(1KHz, 0dB), T.H.D. 1%) /Impedance ................ FRONT/REAR : 2V±2.5dBV/ch/10kohm
SUB-W(STEP+15) : 2V±2.5dBV/ch/10kohm
Dimensions (W x H x D) ................................................................................................ Chassis : 178 x 50 x 160mm
Nose : 188 x 58 x 27mm
Weight ................................................................................................................................................................. 1.5kg
NOTE : Due to Continuing product improvement, specifications and designs are subject to change without notice.
TO CONTENTS
-6-
CDM-9825RB
Adjustment Procedures
1. FM/MW/LW SECTION
(1) Dummy Antenna Circuit
(2) Connections
(3) Control Settings
Power Switch .............................................. ON Band Switch .............................. FM/MW/LW
Fader Control ........................... Center Position LOUD .................................................... OFF
Balance Control ....................... Center Position SUB-W .................................................. OFF
Treble Control .......................... Center Position Others ................................................... OFF
Bass Contro ............................. Center Position
TO CONTENTS
-7-
CDM-9825RB
(4) Adjustment Procedures
Test Point/
Step Description Connection SignalGenerator Dial Control P.W.Board Adjustment
Coordinates
TP002 AutoAdjustment:
87.5MHz ,
(3-F) After settingup of SignalGenarator,
(1) 26dBµ 87.5MHz
TP608 short GND andTP608(Pull-Down)
(Mod. OFF)
(5-D) for 2~3 seconds.
Proceedsame AutoAdjustmentof step
(1) understep (2).
TP002 (SPEC) TP002: 1.5±0.1V: OK
87.5MHz ,
(3-F) (SPEC) TP002: others1.5±0.1V: NG
(2) 26dBµ 87.5MHz
SignalMeter TP608
(Mod. OFF)
Auto (5-D) NOTE : NG : Proceedsame Auto
1 Figure 3 Adjustmentof step (1)
Adjustment
(FM) understep (3).
TP002
87.5MHz ,
(3-F) Proceedsame AutoAdjustmentof step
(3) 21~23dBµ 87.5MHz
TP608 (1) understep (3).
(Mod. OFF)
(5-D)
TP002
87.5MHz ,
(3-F) Proceedsame AutoAdjustmentof step
(4) 26dBµ 87.5MHz
TP608 (1) understep (4).
(Mod. OFF)
(5-D)
TP002 AutoAdjustment:
999kHz ,
(3-F) After settingup of SignalGenarator,
(1) 34dBµ 999kHz
TP608 short GND andTP608(Pull-Down)
(Mod. OFF)
(5-D) for 2~3 seconds.
Proceedsame AutoAdjustmentof step
(1) understep (2).
TP002 (SPEC) TP002: 1.0±0.1V: OK
999kHz ,
(3-F) (SPEC) TP002: others1.0±0.1V: NG
(2) 34dBµ 999kHz
SignalMeter TP608
(Mod. OFF)
Auto (5-D) NOTE : NG : Proceedsame Auto
2 Figure 4 Adjustmentof step (1)
Adjustment
(MW) understep (3).
TP002
999kHz ,
(3-F) Proceedsame AutoAdjustmentof step
(3) 29~31dBµ 999kHz
TP608 (1) understep (3).
(Mod. OFF)
(5-D)
TP002
999kHz ,
(3-F) Proceedsame AutoAdjustmentof step
(4) 34dBµ 999kHz
TP608 (1) understep (4).
(Mod. OFF)
(5-D)
TO CONTENTS
-8-
CDM-9825RB
Test Point/
Step Description Connection SignalGenerator Dial Control P.W.Board Adjustment
Coordinates
TP002 AutoAdjustment:
216kHz ,
(3-F) After settingup of SignalGenarator,
(1) 34dBµ 216kHz
TP608 short GND andTP608(Pull-Down)
(Mod. OFF)
(5-D) for 2~3 seconds.
Proceedsame AutoAdjustmentof step
(1) understep (2).
TP002 (SPEC) TP002: 1.0±0.1V: OK
216kHz ,
(3-F) (SPEC) TP002: others1.0±0.1V: NG
(2) 34dBµ 216kHz
SignalMeter TP608
(Mod. OFF)
Auto (5-D) NOTE : NG : Proceedsame Auto
3 Figure 4 Adjustmentof step (1)
Adjustment
(LW) understep (3).
TP002
216kHz ,
(3-F) Proceedsame AutoAdjustmentof step
(3) 29~31dBµ 216kHz
TP608 (1) understep (3).
(Mod. OFF)
(5-D)
TP002
216kHz ,
(3-F) Proceedsame AutoAdjustmentof step
(4) 34dBµ 216kHz
TP608 (1) understep (4).
(Mod. OFF)
(5-D)
TO CONTENTS
-9-
CDM-9825RB
Extension Cable
* When repairing or measuring the voltage of this unit, connect with the Extension Cable as shown in below.
TO CONTENTS
- 10 -
Block Diagram CDM-9825RB
ANT001
MINI BUS IN
DIN001
FM EL VOL (TDA7412)
MB4R002Z RCA201
AM MUTE SUB-W
Selector Vol. 1 Tre/Bass Vol. 2
LPF
F
CD
MUTE
I²C
JK201
Tuner unit
RDS MUTE
DECODER R
TUNER+B
Mute
Driver CB801
MINI
BUS I/F FRONT
DP23S2AO
BUFFER POWER
Main u-COM System IC REAR
SERVO Reset
+B
BATT
Det POWER BATT
ON+B
ACC
Det
ST-REMO
ACC
P-ANT
P.ANT/
O.REM O-REM
LCD
Driver
Key Rotary
LCD401 Matrix Encoder
- 11 - TO CONTENTS
100k
N.U.
TH602
47k
N.U.
R610
N.U.
Q601
R658
R877
R635
R648
DTA124EKA
N.U.
R630
D601
22k
R631
C628 0.1
R606 1k
R878
R638 12k 1SS133 22k-1/4
N.U.
Q612
R685
10k
DTC124EKA R632
220-1/4
Q610
C662
1000p
R637 R601 N.U. DTC124EKA
R627
N.U.
TH601
100k
N.U. R602 N.U.
C610
330p
TP605
TP606
C601
R686 2.2k
22k-1/4
N.U.
R883
R641
TP601
TP602 R607 10k
TP603
1k
N.U.
R822
R604
22k Q664
CB802 Q867
53253-0210 DTA143EKA
2SD1994A D662
DAN202k
M802
0.1
C806
MOTOR, F2510CT-12UCV Q866
C805
0.1
R882 FMC2 1k
R642
470-1/4 R664 47k-1/4
10/16
TP604
E812
C609 IC651 TDA3606AT
ZD804
18p
HZS9C2L
IC601
D784216AGF
XL601
12.288MHz
N.U.
C608
R651 56k
18p L600
R663 4.7uH
R656
C651
22k
330k
33/16
R662