Pickup
Beam source / wavelength Semiconductor laser / 780nm
Number of channels Stereo
Wow and flutter Below measurable limit
Digital filter 8fs
D/A converter MASH (1 bit DAC)
Frequency response 20Hz - 20 kHz (+1dB, -2dB)
n General
Power supply AC 120 V, 60 Hz
Power consumption 57 W
1 Safety Precautions
4
1.1. GENERAL GUIDELINES
4
2 Before Repair and Adjustment
6
3 Protection Circuitry
6
4 Handling the Lead-free Solder
6
4.1. About lead free solder (PbF)
6
5 Precaution of Laser Diode
7
6 Handling Precautions For Traverse Deck
8
7 Accessories
9
8 Operation Procedures
10
9 Information on CD & MP3
11
10 Assembling and Disassembling
12
10.1. Disassembly flow chart
12
10.2. Disassembly of Side Panel L & R
13
10.3. Disassembly of Top Cabinet Unit
13
10.4. Disassembly of Deck Mechanism and Tape Eject P.C.B
13
10.5. Disassembly of Headphone P.C.B
14
10.6. Disassembly of Front Panel Assembly
14
10.7. Disassembly of Panel P.C.B
15
10.8. Disassembly of Rear Cabinet
15
10.9. Disassembly of Tuner Pack
15
10.10 . Disassembly of Main P.C.B
16
10.11 . Disassembly of Powe r P.C.B
16
10.12 . Disassembly of Speak er Termi nal P.C.B
17
10.13 . Disassembly of Trans forme r P.C.B
17
10.14 . Disassembly of CD Mech anism
18
10.15 . Checking Procedure for Each Major P.C.B .
19
10.16 . Procedures of Repla cing Trave rse Base (Unit), Driving
Gear, and Cam Gear (CD Mechanism Unit)
19
10.17 . Procedures for Repla cing Optica l Pickup (CD Mech anism
Unit)
22
10.18 . Procedures for Repla ceme nt Traverse Gear A and
Traverse Gear B (CD Mechanism Unit)
23
Dimensions (W x H x D) 165 x 228 x 315.6 mm
(6 1/2” x 9” x 12 7/16”)
Mass 3.6kg(7.9Ibs)
Power consumption in standby
mode
0.5 W
Notes :
1. Specifications are subject to change without notices. Mass and
dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
n System : SC-PM21PC-S Music center: SA-PM21PC-S
Speaker: SB-PM21E-MJ
10.19 . Procedure for Repla cing Casse tte Holde r
24
10.20 . Procedure for Repla cing Pinch Roller and Head Block
(Deck Mechanism Unit)
24
10.21 . Procedure for Repla cing Motor , Capstan Belt A, Capst an
Belt B, and Winding Belt (Deck Mechanism Unit)
25
10.22 . Procedure for Repla cing Parts on Deck Mechanism PCB
27
10.23 . Handling of casse tte tape jam
27
11 Service Positions
29
11.1. Checking procedure
29
11.2. Checking the major P.C.B.
29
12 Self Diagnostic Function
30
12.1. Self-diagnosis Function
30
12.2. Clearing all error code
32
12.3. Cancelling the Self-Diagnostic mode
32
12.4. Setting of doctor mode
32
13 Procedure for Checking Operation of Individual Parts of Deck
Mechanism Unit
37
13.1. Operation Check with Cassette Tape
37
13.2. Operation Check without Cassette Tape
37
14 Measurement And Adjustments
39
14.1. Cassette Deck Section
39
15 Voltage Measurement and Waveform Chart
41
15.1. Voltage Measurement
41
15.2. Waveform
43
16 Block Diagram
44
16.1. CD Servo Block
44
16.2. Main Block
46
17 Notes of Schematic Diagram
50
18 Schematic Diagram
51
18.1. CD Servo Circuit
51
18.2. Main Circuit and Tuner Extent Circuit
53
18.3. Panel Circuit
57
CONTENTS
Page Page
2
SA-PM21PC
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