Sony CFD-Z125 - Cd Radio Cassette-corder User manual

CFD-Z125/Z135
US Model
CFD-Z125/Z135
E Model
CFD-Z135
SERVICE MANUAL
CD RADIO CASSETTE-CORDER
MICROFILM
Model Name Using Similar Mechanism NEW
CD Mechanism Type KSM-213CDM/Z-NP
Optical Pick-up Name KSS-213C/Z-N
Model Name Using Similar Mechanism NEW
TapeTransport Mechanism Type MF-Z125
— Continued on next page —
SPECIFICATIONS
CD
Section
Tape deck
Section
Photo: CFD-Z135
AUDIO POWER SPECIFICATIONS
POWER OUTPUTAND TOTAL HARMONIC DISTORTION
With 3.2 Ωloads, both channel driven from 250 – 6,300 Hz; rated 2W per
channel-minimum RMS power, with no more than 10 % total harmonic
distortion inAC operation.
Other Specifications
CD player section
System Compact disc digital audio system
Laser diode properties Material: GaAlAs
Wave length:780 nm
Emission duration : Continuous
Laser output : Less than 44.6 µW
(This output is the value measured at a distance
of about 200 mm from the objective lens surface
on the optical pick-up block with 7 mm
aperture.)
Spindle speed 200 r/min (rpm) to 500 r/min (rpm) (CLV)
Number of channels 2
Frequency response 20 – 20,000 Hz + 3/-3 dB
Wow and flutter Below measurable limit
Radio section
Frequency range FM : 87.6 – 108 MHz
AM : 530 – 1,710 kHz
Aerials FM : Telescopic aerial
AM : Built-in ferrite bar aerial
Cassette-corder section
Recording system 4 -track 2 channel stereo
Fast winding time Approx. 110 s (sec.) with Sony cassette
C-60
Frequency response TYPE Ι(normal) : 80 – 10,000 Hz
General
Speakers Full range : 10 cm (4 in) dia., 3.2 Ω, cone
type (2)
Outputs Headphones jack (stereo minijack)
For 16 – 68 Ωimpedance headphones
Power output (excluding US model)
2.3 W + 2.3 W (at 3.2 Ω, 10 % harmonic
distortion in DC operation)
Power requirements For CD radio cassette-corder :
120VAC, 60 Hz
9V DC, 6 size D (R20) batteries
For remote (CFD-Z135 only) :
3V DC, 2 size AA (R6) batteries
Power consumption AC 19W

— 2 —
Battery life For CD radio cassette-corder:
FM recording
Sony R20P : approx. 7 h
Sony alkaline LR20 : approx. 14.5 h
Tape playback
Sony R20P : approx. 3.5 h
Sony alkaline LR20 : approx. 8 h
CD playback
Sony R20P : approx. 2 h
Sony alkaline LR20 : approx. 4.5 h
Dimensions Approx. 622 ×275 ×230 mm (w/h/d)
(24 1/2×10 7/8×9 1/8inches) (incl. projecting
parts)
Mass Approx. 6.8 kg (15 lb.) (incl. batteries)
Supplied accessories AC power cord (1)
Remote controller (1) (CFD-Z135 only)
Design and specifications are subject to change without notice.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK!OR DOTTED LINEWITH
MARK !ONTHE SCHEMATIC DIAGRAMS AND INTHE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Checktheantenna terminals, metal trim,“metallized”knobs, screws,
and all other exposed metal parts forAC leakage. Check leakage as
described below.
LEAKAGE
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-operatedAC 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)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µ F1.5 k
Ω
AC
Voltmeter
(0.75 V)
Earth Ground
Fig.A. Using anAC voltmeter to checkAC leakage.
CAUTION
Use of controls or adjustments or performance of procedures
otherthan those specified hereinmayresult in hazardousradiation
exposure.
TABLE OF CONTENTS
1. SERVICE NOTES ···························································· 3
2. GENERAL ·········································································· 4
3. DISASSEMBLY
3-1. Rear Cabinet ······································································· 9
3-2. CD Block ·········································································· 10
3-3. Main Board, SP Terminal Board ······································ 10
3-4. CD Decoder Board, Lamp Board ····································· 11
3-5. Optical Pick-up Section (KSM-213CDM/Z-NP) ············· 11
3-6. Optical Pick-up (KSS-213C/Z-N) ···································· 12
3-7. Motor Board, Sled Motor (M702) ···································· 12
3-8. Front Board, Sensor Board ···············································13
3-9. Mechanism Deck (MF-Z125)··········································· 13
3-10. Belt, Capstan/Reel Motor (M601)···································· 14
3-11. Cassette Door ··································································· 14
4. DIAL POINTER SETTING·········································· 15
5. ADJUSTMENTS
5-1. MechanicalAdjustment ···················································· 16
5-2. ElectricalAdjustment
Tape Deck Section ···························································· 16
Tuner Section···································································· 18
CD Section ······································································· 20
6. DIAGRAMS
6-1. Circuit Boards Location ···················································23
6-2. Block Diagram ································································· 24
6-3. Printed Wiring Board —CD Section — ··························· 29
6-4. Schematic Diagram — CD Section — ····························· 32
6-5. Schematic Diagram — Main Section — ·························35
6-6. Printed Wiring Board —Main Section — ························ 39
6-7. Printed Wiring Board —Front Section — ························ 43
6-8. Schematic Diagram —Front Section —··························· 45
6-9. IC Pin Function Description ············································· 47
7. EXPLODED VIEWS
7-1. Back Cabinet Section ·······················································49
7-2. Front Panel Section ·························································· 50
7-3. CD Block Section ·····························································51
7-4. Optical Pick-up Section (KSM-213CDM/Z-NP) ············· 52
7-5. Mechanism Deck Section-1·············································· 53
7-6. Mechanism Deck Section-2·············································· 54
7-7. Speaker Section ································································ 55
8. ELECTRICAL PARTS LIST ······································· 56

— 3 —
SECTION 1
SERVICE NOTES
NOTES ON HANDLINGTHE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair,pay attention to electrostatic breakdown and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
•Code number of Chuck Plate Jig : X-4918-255-1
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Turn POWER switchonwithno disc inserted andmake Function
switch to CD position.
2. Open the lid for CD.
3. Turn on S702 as following figure.
4. Press the flbutton.
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 the focus
search.
HOWTO CHANGETHE FM CERAMIC FILTERS
This model uses the two ceramic filters of CF1 and CF4.
You must use the same type of color marked ceramic filters in order
to meet same specifications.
Therefore,the ceramic filter must change two pieces together since
it’s supply two pieces in one package as a spare parts.
Mark 1 Mark 2 Center
frequency
red — 10.70MHz
blue — 10.67MHz
orange — 10.73MHz
black — 10.64MHz
white — 10.76MHz
white white 10.75MHz
yellow — 10.79MHz
mark 1 mark 2
CF1,4
S702

— 4 —
SECTION 2
GENERAL This section is extracted
from instruction manual.

— 5 —

— 6 —

— 7 —

— 8 —

— 9 —
SECTION 3
DISASSEMBLY
REAR CABINET
(Page 9)
CASEETTE DOOR
(Page 14)
SET CD BLOCK
(Page 10)
MECHANISM DECK
(Page 13) BELT, CAPSTAN/REEL MOTOR (M601)
(Page 14)
MAIN BOARD,
SP TERMINAL BOARD
(Page 10)
FRONT BOARD,
SENSOR BOARD
(Page 13)
MOTOR BOARD,
SLED BOARD (M702)
(Page 12)
CD DECODER
BOARD,
LAMP BOARD
(Page 11)
OPTICAL
PICK-UP
SECTION
(Page 11)
OPTICAL
PICK-UP
(Page 12)
Note : Follow the disassembly procedure in the numerical order given.
•This set can be disassembled in the order shown below.
3-1. REAR CABINET
6 CN304
4 Screw 2pcs
(+KTP 3 × 12)
3 Screw
(+BTP 3 × 12)
2 Screws 5pcs
(+BTP 3 × 16)
1 Battery Case li
d
5 Rear Cabinet

— 10 —
4 CD Block
3 Screws 5pcs
(+BTP 3 × 12)
2 CN302
1 CN305
3 Screws 3pcs
(+BTP 3 × 12)
1 CN303
2 CN07
4 MAIN Boar
d
5 SP TERMINAL
Board
3-2. CD BLOCK
3-3. MAIN BOARD, SPTERMINAL BOARD

— 11 —
3-4. CD DECODER BOARD, LAMP BOARD
3-5. OPTICAL PICK-UP SECTION
(KSM-213CDM/Z-NP)
1 CN801
4 Screws 2pcs
(+BTP 3 × 10)
6 CD DECODER
Board
8 CN706
9 LAMP Board (Z135 only)
2 CN701
3 CN802
3 CN703
5 Lag
7 Two claws
Remove
solder
1 Screws 4pcs
(+PTPWH 2.6 × 8)
2 Optical Pick-up
Section
(KSM-213CDM/Z-NP
)

— 12 —
3-6. OPTICAL PICK-UP
(KSS-213C/Z-N)
3-7. MOTOR BOARD, SLED MOTOR (M702)
1 Remove
two solders
2 MOTOR Board
3 Screws 2pcs
(+P 2 × 3)
1 Remove
two solder
s
4 Sled motor (M702)
1 Two claws
2 CD Pick-up Cover
1 Two claws
3 Claw
4 A gea
r
7 Optical Pick-up
(KSS-213C/Z-N)
5 Claw
6 Sled shaft

— 13 —
3-8. FRONT BOARD, SENSOR BOARD
3-9. MECHANISM DECK (MF-Z125)
1 CN305
2 CN302
3 Press the eject ( p 6 ) button
6 Two claws
4 Screws 2pcs
(+BTP 3 × 10
)
7 Mechanism deck
(MF-Z125)
5 lag
1 CN003
2 CN303
3 Two claws
3 Two claws
4 Function button
5 Screws 3pcs
(+BTP 3 × 10)
6 Three
claws
7 Remove solder
8 Earth wire
9 FRONT board
0 Remove solder
!¡ SENSOR board
(Z135 only)

— 14 —
3-10. BELT, CAPSTAN/REEL MOTOR (M601)
3-11. CASSETTE DOOR
1 Press the eject ( p 6 ) button
2 Two claws
3 Remove the Cassette door
to direction of the arrow A
A
2
Two claws
1 Remove solder
2 Screw
(MB)
3 Claw
4 Main belt
5 Screws 2pc
(Motor collar)
6 Motor bracke
t
7 Capstan/reel motor
(M601)

— 15 —
SECTION 4
DIAL POINTER SETTING
Note : Follow the disassembly procedure in the numerical order given.
Claw
Dial pointer
3 Setting the
dial pointer.
2 Two screws
(+BTP3 × 12)
1 Tuning knob holder ass`y
A
5
MAIN board
4 Rotate the dial drum fully
in direction of the arrow A .

— 16 —
SECTION 5
ADJUSTMENTS
5-2. ELECTRICAL ADJUSTMENT
1. The adjustments should be perfomed in the order given in the
service manual. (As a general rule. Playback circuit adjustment
should be completed before performing recording circuit
adjustment.)
2. The adjustment should be performed for both L-ch and R-ch
unless otherwise indicated.
•Switch Location
FUNCTION switch ........................................................ TAPE
VOLUME switch .....................................................maximum
Standard output level
Test tape
Record/Playback Head Azimuth Adjustment
Procedure :
1. Mode : Playback
2. Turn the adjustment screw for the maximum output levels. If
these levels do not match, turn the adjustment screw until both
of output levels match together within 1dB.
PHONES
32 Ω
0.25 V (–10dB)
Load impedance
Output level
Type
P-4-A063 Used for Head azimuth adjustment.
Signal
6.3kHz, –10dB
5-1. MECHANICAL ADJUSTMENT
PRECAUTION
1. Clean the following parts with a denatured-alchool-moistened
swab: record/playback head pinch roller
erase head rubber belts
capstans idlers
2. Demagnetize the record/playback head with a head
demagnetizer. (Do not bring the head demagnetizer close to the
erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustment should beperformed with theratedpowersupply
voltage unless otherwise noted.
Torque Measurement
TapeTension Measurement
Meter Reading
30 – 70 g•cm
(0.42 – 0. 97 oz•inch)
1 – 6 g•cm
(0.014 – 0.084 oz•inch)
more than 55 g•cm
(more than 0.76 oz•inch)
more than 55 g•cm
(more than 0.76 oz•inch)
Mode
FWD
FWD
back tension
FF
REW
Torque Meter
CQ-102C
CQ-201B
TAPE DECK SECTION
Mode
FWD
Meter Reading
more than 80g
(more than 1.12 oz•inch)
Tension Meter
CQ-403A
0 dB = 0.775V
SP OUT
32 Ω
0.775 V (0dB)
3.2 Ω
test tape
P-4-A063
(6.3kHz, –10dB)
set
level meter
SPEAKER terminal (JK302)
+
–
screw angle
L-CH
peak
R-CH
peak
R-CH
peak
L-CH
peak
Screw
position
output
level within
1dB withi
n
1dB

— 17 —
3. Phase Check
Mode: playback
4. After the adjustment, lock the screws with locking compound.
Adjustment Location :
VH
oscilloscope
SPEAKER terminal (JK302)
test tape
P-4-A063
(6.3kHz, –10dB)
set
L-CH L-CH
32
Ω
32 Ω
R-CH
R-CH
screen pattern
in phase 45
° 90 ° 135 ° 180 °
good wrong
Deck
screwdriver
Tape Speed Adjustment
Procedure :
Mode : Playback
AdjustmentValue : normal tape speed (3,000Hz)
Frequency difference between the beginning and the end of the
tape should be within 3% (90Hz).
Adjustment Location : Motor, M601
Digital frequency counter
2,985 – 3,015Hz
Speed checker
–3.0 to 3.0%
3.2 Ω
test tape
WS-48B
(3kHz, 0dB)
set
speed checker
LFM-30 or
digital frequency
counter
SPEAKER Terminal
(JK302)
+
–
Tape speed adjustment
control inside motor, M601

— 18 —
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455kHz
TUNER SECTION
Put the lead-wire
antenna close to
the set.
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
AM RF SSG
0.01 µ F
FM RF SSG FM telescopic
antenna termina
l
75kHz frequency deviation
by 1 kHz signal.
output level : as low as possible
set
3.2 Ω
set +
–
level meter
SPEAKER terminal (JK302)
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 520kHz
CT4 1,780kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 600kHz
CT3 1,400kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 97.5MHz
CT2 108.5MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 90MHz
CT1 106MHz
Adjustment Locastion: MAIN board (See page 19.)
VCO Adjustment
Procedure:
1. Connect the frequency counter to pin 4of IC1 as shown the
figure below.
2. Tune the set to 98MHz.
3. Adjust RV1 for 75.95kHz to 76.05kHz reading on the frequency
counter.
Adjustment Locastion: MAIN board (See page 19.)
0.01 µ F
FM RF SSG FM telescopic
antenna termina
l
Carrier frequency : 98MHz
Modulation : no modulation
Output level : 0.1V (100dB)
set
IC1 pin 4
MAIN board 1
µ F
frequency counter
[AM]
[FM]

— 19 —
Adjustment Locastion:
L4 CT4 CT3
AM Tracking Adjustment
CT1
L1
T1
AM IF Adjustment
16
15
14
IC1
L2
CT2
FM Frequency Coverage
Adjustment
RV1 VCO Adjustment
FM Tracking
Adjustment
L3
AM Tracking Adjustment
AM Frequency Coverage
Adjustment
[MAIN BOARD] (Component Side)

— 20 —
Notes on Adjustment
1. Perform adjustment in test mode.
After adjustment, be sure to release test mode.
2. Perform adjustments in the order given.
3. Use the disc (YEDS-18, Parts No. 3-702-101-01) only when
so indicated.
How to EnterTest Mode
1. Short-circuit the pin #∞ and GND of IC801 on the CD
DECODER board as shown.
2. Insert the AC plug cord into the power outlet and turned ON
the power switch.
3. The LCD display change in 5 ways, and stop when they all
light up. (The unit sets in the test mode after the above steps.)
4. Remove the short-circuit connected in step 1.
How to Exit theTest Mode
1. Turn OFF the power switch.
2. The set thus becomes available for normal operation.
CD SECTION Before Begining Adjustment
Put the set into test mode and perform the following checks.
Repair if there are any problems.
• Sled Motor Check
Press ±, ≠buttonsand confirm thattheoptical pick-up moves
smoothly from the innermost to outermost circumference and back
smoothly and with no catching or abnormal noises.
±: Optical pick-up moves to the outer circumference.
≠: Optical pick-up moves to the inner circumference.
• Focus Search Check
1. Pressthe CD ±button.(Focussearch operation is performed
continuously.)
2. Look at the optical pick-up objective lens and confirm that it
moves up and down smoothly, with no catching or abnormal
noises.
3. Press πbutton.
Confirm that focus search operation stops. If it does not, press
the πbutton again longer.
[CD DECODER BOARD] (Conductor Side)
GND
Jumper
IC801
pin-35