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3

......................................................... 4

Location of controls ................................................................. 5

3-1.   Cabinet (Front) Sub Assy .................................................... 6
3-2.   Wires ................................................................................... 7
3-3.   Power (1) Board, Power (2) Board ...................................... 7
3-4.   Cabinet (Upper) Assy .......................................................... 8
3-5.   Main Board ......................................................................... 8
3-6.   CD Mechanism Block ......................................................... 9
3-7.   Tape Mechanism Block ....................................................... 9
3-8.   Holder Assy, Cassette ........................................................ 10
3-9.   PRE Board ......................................................................... 10
3-10. Belt, M801 (Capstan/Reel Moter),

HRP301 (Head, Magnetic) ................................................ 11

3-11. Optical Pick-up ................................................................. 11

............................... 12

Tape Section .......................................................................... 12
Tuner Section ......................................................................... 13
CD Section ............................................................................ 14

6-1.   IC Pin Description ............................................................. 15
6-2.   Circuit Boards Location .................................................... 15
6-3.   Block Diagram – CD Section – ......................................... 16
6-4.   Block Diagram – Main Section – ...................................... 17
6-5.   Printed Wiring Board – CD Section – ............................... 18
6-6.   Schematic Diagram – CD Section – .................................. 19
6-7.   Printed Wiring Boards – Main Section – .......................... 20
6-8.   Schematic Diagram – Main Section (1/4) – ...................... 21
6-9.   Schematic Diagram – Main Section (2/4) – ...................... 22
6-10. Schematic Diagram – Main Section (3/4) – ...................... 23
6-11. Schematic Diagram – Main Section (4/4) – ...................... 24
6-12. Printed Wiring Boards – Control Section – ....................... 25
6-13. Schematic Diagrams – Control Section – ......................... 26
6-14. Printed Wiring Boards – Power Supply Section – ............ 27
6-15. Schematic Diagrams – Power Supply Section – ............... 28

7-1.   Cabinet (Front) Section ..................................................... 32
7-2.   Cabinet (Rear) Section ...................................................... 33
7-3.   Cabinet (Upper) Section .................................................... 34
7-4.   Tape Mechanism Section-1 ............................................... 35
7-5.   Tape Mechanism Section-2 ............................................... 36
7-6.   Optical Pick-up Section .................................................... 37

......................................... 38

To Exposed Metal
Parts on Set

0.15µF

1.5k

Ω

AC
voltmeter
(0.75V)

Earth Ground

After correcting the original service problem, perform the following
safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.

The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA

WT-540A. Follow the manufacturers’ instructions to use these
instruments.

2. A battery-operated AC milliammeter. The Data Precision 245

digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM

or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-voltage scale. The
Simpson 250 and Sanwa SH-63Trd are examples of a passive
VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)

4

On repairing CD section, playing a disc without the lid (CD), use
Chuck Plate Jig.
• Code number of Chuck Plate Jig: X-4918-255-1

LASER  DIODE  AND  FOCUS  SEARCH  OPERATION
CHECK
1. Turn ON the POWER button and press FUNCTION button to

CD position.

2. Open the lid (CD).
3. Turn on S801 with screwdriver, etc. as following figure.
4. Press the CD  N X  button.
5. Confirm the laser diode emission while observing the objecting

lens. When there is no emission, Auto Power Control circuit or
Optical Pick-up is broken.
Objective lens moves up and down three times for focus search.

5

This section is extracted
from instruction manual.

REC     PLAY    REW      FF    STOP/EJECT PAUSE

Z

 PUSH

N X

x

i

TUNE –, +
.

,>

N

x

X

.

,>

Tip
  To listen through headphones, connect the headphones to the i (headphones) jack.

6

• The equipment can be removed using the following procedure.

Note : Follow the disassembly procedure in the numerical order given.

Set

Cabinet (Front) Sub Assy

Wires

Tape Mechanism Block

Main Board

Belt,M801(Capstan/Reel Motor),
HRP301 (Head, Magnetic)

CD Mechanism Block

Holder Assy, Cassette

PRE Board

Optical Pick-up 

Cabinet (Upper) Assy

Power (1) Board, Power (2) Board

1

2

5

4

6

3

7

8

9