Casio PZ-3100 User manual

(without price)
PZ-3100
PORTABLE CD PLAYER
Model-B: USA
Model-C: Europe
INDEX

Disassembly Instructions .............................................................................................................. 1
CD Adjustment ............................................................................................................................... 2
Block Diagram ................................................................................................................................ 3
Troubleshooting ............................................................................................................................. 4
PCB Views..................................................................................................................................... 11
CD Amplifier PCB Top View ..................................................................................................... 11
CD door PCB Top View............................................................................................................11
CD AMP PCB Bottom View ...................................................................................................... 12
Wiring Diagram............................................................................................................................. 13
IC Lead Identification and Internal Diagrams............................................................................. 14
Schematic Diagrams .................................................................................................................... 21
Parts List ....................................................................................................................................... 23
Exploded Views ............................................................................................................................ 29
Cabinet..................................................................................................................................... 29
CD Mechanism......................................................................................................................... 30
CONTENTS

DISASSEMBLY INSTRUCTIONS
1. Remove five screws A holding the case assembly.
2. Remove the CD mechanism unit.
3. Remove screw B holding the CD AMP unit.
4. Remove screw C and pull out the shaft holding the CD door.
5. Remove four screws D holding the display PCB unit.
1
Shaft
CD door
Display PCB unit
Upper case
CD mechanism unit
CD AMP unit
Lower case

CD ADJUSTMENT
Precautions
To prevent damage caused by static electricity, the following procedures for grounding is requir or repairing
the unit.
[Note] Remove the connection after installed.
1. Grounding for the human body
Be sure to put on a wrist-strap for grounding (with impedance lower than 106Ω) whose other end is
grounded. The strap works to drain away the static electricity build-up on the human body.
2. Grounding for the work table
Be sure to lay on the table a conductive sheet (with impedance lower than 106 Ω) such as a sheet of
copper which is grounded.
3. As static electricity build-up on clothes is not drainded away, be careful not to let your clothes touch the
unit.
4. The short-pad on the pick-up PCB of a spare part is short-circuited for protection during shipment. To
open the short circuit, remove the soldering quickly with a soldering iron whose insulation resistance is
larger than 10MΩafter connection to a suitable APC circuit.
Equipment Required
*Multi Meter
*Oscilloscope
*Compact Disc
*Dummy Load 10 kΩ
Pickup
Shorting tab
Desolder here
Pickup
1. Wrist-Strap
for grounding
1MΩ
1MΩ
2. Conductive Sheet
2

3
BLOCK DIAGRAM

RESUME switch off and insert a disc.
Close CD door and press PLAY button.
TROUBLESHOOTING
Is “00” flashing
on LCD ? 1
Is “01” displayed
after “00” flashed ? 2
Is the audio signal
present at the output
terminals ? 3
Press or key.
Can a selected
track number be searched
smoothly ? 4
DSG switch on.
Is there any
aufio signal present at the
output terminals ? 5
OK
No
Yes
No
No
No
No
Yes
Yes
Yes
Yes
4

1
Is +3.2 V lines normal ? No
Yes
*RESUME switch (SW101) off position.
*Q106, Q107 or Q108 is defective.
*Check circuit around IC101 and IC104.
Is the waveform
at IC104 pin 28 like that
shown in fig. 1 ?
No
Yes
*IC101 is defective.
*Check circuit around IC101 and IC104.
Does 5 MHz clock pulse
appear at IC104 pin 29 ? No
Yes
*Crystal (X102) is defective.
*IC104 is defective.
*Check circuit around IC104 and X102.
*IC104 is defective.
*Check circuit around IC104 and
CN102 for loose soldering and heat
seal connecting.
Repair Item 1: At power on, “00” is not displayed.
Repair Item 2: “-- --” is displayed instead of playing first song track.
2
Check how much times it takes until “-- --”
is displayed after PLAY button is pressed.
A B
About
14 sec Over 14 sec
Figure 1
3.2 V
Power on
5

A
Does the LASER emit ? No
Yes
Does the lens moves
up and down ?
Yes
Is the waveform
at testpoint IRF like that
shown in fig. 2 ?
No
Yes
*Check flexible PCB connect.
*Check soldering for IC101, IC102 and
IC103.
*IC101, IC102 or IC103 is defective.
*Pickup is defective.
*IC102 is defective.
*Pickup unit is defective.
Repair Item 2-A
A1
No A2
Load a disc and close the CD door.
Then check the following.
No
Yes
No
Yes
*Check flexible PCB connect.
*IC102 is defective.
*Check circuit around TE line.
Is the waveform
at IC102 pin 1 (FEO) like that
shown in fig. 3 ?
Is the waveform
at IC102 pin 45 (TEO) like that
shown in fig. 4 ?
*Check circuit between IC102 pins1 and
2.
*IC102 is defective.
Note: Connect GND to door switch by removing the
top cabinet. Than open the top cover and check the
radiation power with an optical power meter. If an
optical power meter is not available, watch the
radiation through the lens of the pickup unit at a
minimum distance of 30 cm from the pickup unit.
!
!
!
Figure 2
E = more than 0.9 V
Figure 4
Figure 3
>1.5
6

A1
Is Q107
Base=2.8 V ?
(Play)
Yes
Is the waveform
IC101 pins 26 and 27 like
that shown in fig. 5 ?
No
Yes
*Pickup is defective.
Repair Item 2-A1: Laser does not emit.
No
*Check circuit around IC104 pins 1, 2 and 3.
*Check circuit around IC103 pins 7, 8 and 9.
*Check around IC102 pins 37, 36 and IC101
pin 44.
*IC102, IC103 or IC104 is defective.
*Check circuit around Q107.
*Check flexible PCB connect.
*Q107 is defective.
*Pickup is defective.
Repair Item 2-A2: Object lens of pickup unit does not move up and down.
A2
Is the waveform
at IC102 pin 6 (FOD) like
that shown in fig. 6 ?
No
Yes
*Check soldering of IC102 pin 6.
*IC102 is defective.
*Check circuit and IC101.
*IC101 is defective.
Figure 5
1.8 V
Figure 6
1 V
7

B
Is the waveform
at IC102 pin 35 like that
shown in fig. 7 ?
Yes
Repair Item 2-B
No *Check soldering of C159 and IC103 pins
35 and 21.
*IC103 is defective.
*Check IC103 pins 32, 34, 4, 5, 36,
37, 38, 57, 21 and circuit around
them.
*Check IC103 pins 8, 9 and 77.
*IC104 or IC103 is defective.
When the waveform at IRF with an
osilloscope.
Figure 7
~1.1 V
8