Panasonic sa pm 31 pc service manual

Page 2

SA-PM31 P I SA-PM31 PC

CD, CD-R,

Sampling frequency

Decoding

Beam source/wavelength
Number of channels
Frequency response
Wow and flutter

Digital filter

D/A converter

MP3
Bit rate

Sampling frequency

11 General

Power supply

CD-RW, MP3 8 cm/12 cm (3-3/20 / 4-

73/100")

44.1 kHz

16/20/24 bit linear
Semiconductor laser/ 780 nm
Stereo

20 Hz - 20 kHz (+1dB, -2dB)
Below measurable limit

8 fs

MASH (1 bit DAC)

32 kbps - 320 kbps
32kHZ, 44.1kHz, 48kHz

AC 120 V, 60 Hz

Power consumption
Dimensions (W x H x D)

Mass

Power consumption in standby mode:

11 System: SC»PM31P-S

n System: SC-PM31PC»S

Notes:

135 W

175 x 254 x 390.7 mm
(6-89/100" x 10" x 15-19/50")
5.44 kg (11.99 lbs.)

0.4 W

Music Center: SA-PM31P-S
Speaker: SB-PM31P-SJ
Music Center: SA-PM31PC-S
Speaker: SB-PM31P-SJ

1.Specifications are subject to change without notice.
Mass and dimensions are approximate.

2.Total harmonic distortion is measured by the digital spectrum
analyzer.

3. The labels HIGH" and LOW" on the rear of the speakers refer
to High frequency and Low frequency.

A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

CONTENTS

Page
1 Safety Cautions ...................................................................... 4
1.1. GENERAL GUIDELINES ------------------------------------------------ 4

2 Before Repair and Adjustment
3 Protection Circuitry-
4 Handling the Lead-free Solder

4.1. About lead free solder (PbF) .......................................... 5
5 Precaution of Laser Diode ...................................................... 6
6 Handling Precautions For Traverse Deck ............................... 7
7 Accessories ---------------------------------------------------------------------------- 3
8 Operating Procedures ............................................................ 9
9 Assembling and Disassembling ------------------------------------------- 11

9.1. Disassembly flow chart ----------- "11

9.2.
9.3.
9.4.
9.5.
9.6.

9.7.

9.8.

9.9.
9.10.
9.11.
9.12.
9.13.
9.14.
9.15.
9.16.

Disassembly of Side Panel L & R
Disassembly of Top Cabinet Unit
Disassembly of Deck P.C.B. and Tape Eject P.C.B. ----- 12
----- 13
Disassembly of Main Control P.C.B., Function P.C.B. and

Disassembly of Front Panel Assembly ----------

Power-In P.C.B. -------------------------------------------------- 14
Disassembly of Panel P.C.B. ---------------------------------------- 14
Disassembly of Rear Panel ------------------------------------------ 15
Disassembly of Main P.C.B. ----------------------------------------- 15
Disassembly of Transformer P.C.B -- 16

Disassembly of Tuner Pac

Disassembly of Power P.C.B

Disassembly of CR16 Mechanism --------------------------------- 17
Replacement of CD Lid ................................................ 18
Replacement of Cassette Lid ........................................ 19
Replacement of the Power 10 and Transistors. .............. 20

9.17.

9.18.

9.19.

9.20.
9.21.

Page
Procedure for Replacing Pinch Roller and Head Block
(Cassette Mechanism Unit) ------------------------------------------- 21
Procedure for Replacing Motor, Capstan Belt A, Capstan
Belt B, and Winding Belt (Cassette Mechanism Unit)

Procedure for Replacing Parts on Mechanism PCB --
Replacement of CD traverse deck -------------------------------- 23
Replacement of optical pickup unit (CD mechanism) ----- 25

9.22. Replacement of a traverse gear A and a traverse gear B
............... 25

9.23. Procedure for removing CD loading mechanism ------------ 27

9.24. CR16 mechanism disassembly procedure --------------------- 27

9.25. CR16 MECHANISM ASSEMBLY PROCEDURE-

9.26. Disassembly of traverse mechanism

9.27. Handling of Cassette Tape jam -----

10 Service Positions ------------------------------------------------------------------ 48
10.1. Checking procedure ----------------------------------------------------- 48
10.2. Checking the major P.C.B. ------------------------------------------- 48

11 Self-Diagnostic Display Function ------------------------------------------ 49
11.1. Entering into Self-Diagnostic Mode ------------------------------- 49
11.2. Clearing Self-Diagnostic Memory ---------------------------------- 51
11.3. Displaying Self-Diagnostic Results -------------------------------- 51
11.4. Error Code Table ----------------------

11.5. Cassette Mechanism Self-Diagnostic Mode
11.6. Changer Reliability Test Mode ---------------
11.7. Changer Operation Checking ---------------------------------------- 53
11.8. CR16 Mechanism Ageing Mode ------------------------------------ 54
12 Procedure for Checking Operation of Individual Parts of
Cassette Mechanism Unit ----------------------------------------------------- 55
12.1. Operation Check with Cassette Tape ---------------------------- 55