Sony ZS-D50 Operating Instructions (primary... User manual

Ver 1.1 2000.08
MICROFILM
ZS-D50
SERVICE MANUAL
PERSONAL AUDIO SYSTEM
SPECIFICATIONS
AEP Model
UK Model
Tourist Model
TAPE Model Name Using Similar Mechanism NEW
Section Tape Transport Mechanism Type MF-ZSD50
CD Model Name Using Similar Mechanism ZS-M7
Section MD Mechanism Type CDM-2411AAA
Optical Pick-up Type DAX-11A
– Continued on page 2 –
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 +1 / –1 dB
Wow and flutter
Below measurable limit
Radio section
Frequency range
FM 87.5 - 108 MHz
MW 531 - 1,602 kHz
LW 153 - 279 kHz
IF FM : 10.7 MHz
MW / LW : 450 kHz
Aerials FM : Telescopic aerial
MW / LW : Built-in ferrite bar aerial
Cassette-corder Section
Recording System
4-track 2 channel stereo
Fast winding time
Approx. 130 s (sec.) with Sony cassette C-60
Frequency response
TYPE I (normal) : 50 - 15,000 Hz
General
Speaker Full range : 8 cm (3 1/4in.) dia., 3 ohms, cone type x 2
Input LINE IN jack (stereo minijack)
Minimum input level 250 mV
Outputs Headphones jack (stereo minijack)
For 16 - 68 ohms impedance headphones
LINE OUT jack (stereo minijack)
Rated output level 250 mV at load impedance 47 kilohms
OPTICAL DIGITAL OUT (CD) (optical output connector)
Wavelength : 630 - 690 nm
Maximum power outputs
4.5 W + 4.5 W

– 2 –
Specifications ........................................................................... 1
1. SERVICE NOTE........................................................... 3
2. GENERAL ...................................................................... 4
3. DISASSEMBLY
3-1. “Cabinet, Rear”, “Cabinet Sub ASSY, Front” ............ 6
3-2. Inlet Board, Power Board ........................................... 7
3-3. Battery (R) Board, Battery (L) Board......................... 7
3-4. Cabinet (Upper) ASSY ............................................... 7
3-5. Switch (1) Board......................................................... 8
3-6. Mechanism Deck ........................................................ 8
3-7. Line Board .................................................................. 8
3-8. Tuner Board ................................................................ 8
3-9. CD Block ASSY ......................................................... 9
3-10. Headphone Board ..................................................... 9
3-11. Switch (2) Board, LCD Board, Lamp Board .......... 10
3-12. Main Board, CD/System Board.............................. 10
3-13. CD Block Section ....................................................11
3-14. TC RF Board, Head Relay Board,
Belt (FR/BR), Motor (M691)..................................11
3-15. Tray ASSY, CD ....................................................... 12
3-16. Loading Board ........................................................ 12
3-17. Optical Pick-up Block, Pick-up Relay Board ......... 12
4. TEST MODE................................................................ 13
TABLE OF CONTENTS
5. ADJUSTMENTS
5-1. Mechanical Adjustmens............................................ 14
5-2. Electrical Adjustments .............................................. 14
6. DIAGRAMS
6-1. Explanation of IC Terminals..................................... 18
6-2. Block Diagrams (Tape, Main Section) ..................... 20
6-3. Block Diagrams (Tuner, CD Section)....................... 23
6-4. Printed Wiring Boards (Main Section) ..................... 27
6-5. Schematic Diagram (Main Section) ......................... 31
6-6. Printed Wiring Boards (CD/System Section) ........... 36
6-7. Schematic Diagram (CD/System Section) ............... 41
6-8. Printed Wiring Boards (Tuner Section) .................... 46
6-9. Schematic Diagram (Tuner Section) ........................ 48
7. EXPLODED VIEWS
7-1. Rear Cabinet Section ................................................ 56
7-2. Front Cabinet Section ............................................... 57
7-3. CD Block Section ..................................................... 58
7-4. Mechanism Deck Section -1 ..................................... 59
7-5. Mechanism Deck Section -2 ..................................... 60
7-6. CD Section................................................................ 61
7-7. Optical Pick-up Section ............................................ 62
8. ELECTRICAL PARTS LIST................................... 63
Power requirements
For personal audio system :
230VAC, 50 Hz
12 V DC, 8 R20 (size D) batteries
For memory back-up :
6 V DC, 4 R6 (sizeAA) batteries
For remote commander :
3 V DC, 2 R6 (sizeAA) batteries
Power consumption
AC 27 W
Battery life
For personal audio system
FM recording
Sony R20P : approx. 6 h
Sony alkaline LR20 : approx. 12 h
Tape playback
Sony R20P : approx. 3 h
Sony alkaline LR20 : approx. 6 h
CD playback
Sony R20P : approx. 1.5 h
Sony alkaline LR20 : approx. 3h
Dimensions (incl. projecting parts)
Approx. 435 x 223 x 160 mm (w / h / d)
(17 1/4x 8 7/8x 6 1/8inches)
Mass (incl. batteries)
approx. 4.3 kg (9 lb. 7 oz)
Supplied accessories
AC power cord (1)
Remote commander (1)
Plug adaptor (1) (UK)
Design and specifications are subject to change without notice.

– 3 –
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, ob-
serve more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Close the lid for CD.
2.Press CD ^button.
3. 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 once for the focus search.
CAUTION DURINGWHEN MOUNTINGTHE PULLEY
FORTHE LOADING MOTOR
Make the following adjustment when mounting the loading motor
(part number : 1-698-999-11) and motor pulley (part number : 2-
627-174-01) of the CD section.
Specification : A = 0.9 to 1.1mm
SECTION 1
SERVICE NOTE
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH
MARK !ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICALTO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN INTHIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270°C during
repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering or
unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

– 4 –
SECTION 2
GENERAL
LOCATION AND FUNCTION OF CONTROLS
FRONT PANEL : CD/RADIO/TAPE section
1Tape operation buttons
r/P(REC/REC PAUSE)
0, )(FF/REW, AMS)
p(STOP)
9, ((PLAY)
2Cassette lid
36PUSH OPEN/CLOSE
4DIR MODE button
5COUNTER RESET button
6EDIT button
7CANCEL button
86CD OPEN/CLOSE button
9CD tray
!º CD operation buttons
=, +(AMS/SEARCH)
^(PLAY/PAUSE)
p(STOP)
FRONT PANEL:TIMER/COM section
!¡ Radio operation buttons
RADIO BAND
PRESET +, –
!™ AUTO PRESET button
!£ MODE MONO/ST ISS button
!¢ STANDBY button
!∞ SLEEP button
!§ OPR/BATT indicator
!¶ OPERATE button
!• Remote control receiver
!ª Display window
@º DISPLAY button
@¡ VOL +, –
@™ SOUND button
@£ MEGA BASS button
@¢ ENTER/MEMORY CHECK button
@∞ MD(LINE) button
@§ Speaker
@¶ 2(Headphones) jack (stereo mini jack)
@• TUNING TIME SET +, – button
@ª TIMER button
#º CLOCK button

– 5 –
REAR PANEL
1FUNCTION button
Each time you pressed, the function changes in the order
CD – Tape – Radio – Line – CD • • •
26CD OPEN/CLOSE button
3Number buttons
4MODE button
5Radio operation buttons
TUNE +, – button
BAND
6CD operation buttons
=, +(AMS/SEARCH)
((PLAY)
P(PAUSE)
p(STOP)
7Tape operation buttons
p(STOP)
9, ((PLAY)
r/P(REC/REC PAUSE)
0, )(FF/REW, AMS)
8OPERATE button (AC only)
Active only when you use the set with AC power source.
9MEGA BASS button
!º VOL +, – button
!¡ SOUND button
#¡ Battery compartment
#™ FM telescopic antenna
#£ LINE IN jack
#¢ LINE OUT jack
#∞ OPTICAL DIGITAL OUT(CD) jack
#§ AC IN ⁄jack
#¶ OPTICAL DIGITAL OUT(CD) jack cover socket
Remote commander
1
2
3
4
5
6
8
9
!º
!¡
7

– 6 –
SECTION 3
DISASSEMBLY
Note:Followthedisassemblyprocedureinthenumericalordergiven.
3-1.“CABINET, REAR”,“CABINET SUB ASSY, FRONT”
r
Theequipmentcanberemo vedusingthef ollo wingpr ocedure .
< MAIN BLOCK SECTION >
Headphone board
Cabinet sub
ASSY, Front
Inlet board, Power board Battery (R) board, Battery (L) board
Cabinet, Rear
Set
Main board
CD block section
Cabinet (Upper) ASSY Switch (1) board Mechanism deck
CD/System board
Switch (2) board, LCD board, Lamp board
Line board
Tuner board
CD block ASSY
Mechanism deck TC RF board, Head relay board, Belt (FR/BR), Motor (M691)
< MECHANISM DECK SECTION >
Tray ASSY, CD
Loading board
CD block section Optical pick-up block, Pick-up relay board
< CD BLOCK SECTION >
<MAIN BLOCK SECTION>
Handle
Cabinet sub ASSY, Front
Telescopic antenna
4 Screws (+BV 3X12)
4 Screws (+BV 3X12)
4 Screws (+BV 3X12)
5
1
2
3
Lid, Battery case
Cabinet, Rear

– 7 –
3-3. BATTERY (R) BOARD, BATTERY (L) BOARD
3-4. CABINET (UPPER) ASSY
3-2. INLET BOARD, POWER BOARD
Power board
3 Screws
(+BV 3X10)
4
2
1 Screws (+BV 3X10) Inlet board
Cabinet, Rear
Battery (R) board
3 Bracket (2), Yok
e
1 Claw
4
2
Battery (L) board
Cabinet, Rear
Cabinet sub ASSY, Front
1 Screws (+BV 3X10
)
2
Cabinet (Upper) ASSY

– 8 –
3-5. SWITCH (1) BOARD 3-6. MECHANISM DECK
1 Screws (+BV 3X8)
3
2
Switch (1) board
Claw Cabinet (Upper) ASS
Y
3-8.TUNER BOARD
3-7. LINE BOARD
Cabinet (Upper) ASSY
Damper
Mechanism deck
Stopper, Wiring
Plate, Upper
1 Screws
(+BV 3X10)
1 Screws
(+BV 3X10)
1 Screw
(+BV 3X10
)
2
Cabinet sub ASSY, Fron
t
21
Line board Claw
Cabinet sub ASSY, Front
4 Screws (+BV 3X10
)
2 Screws (+BV 3X10)
1 Wire, Parallel (FFC) (10 core)
(Main board : CN305)
3
5
Bracket, Tuner
Tuner board

– 9 –
3-10. HEADPHONE BOARD
3-9. CD BLOCK ASSY
Cabinet sub ASSY, Front
CD block ASSY
3 Screws (+BV 3X10)
3 Screws (+BV 3X10)
2 Wire, Parallel (FFC) (30 core)
(CD/System board : CN801)
1 Wire, Parallel (FFC) (13 core
)
(CD/System board : CN803)
4
Cabinet sub ASSY, Front
Headphone board
1 Screw (+BV 3X10)
2

– 10 –
3-11. SWITCH (2) BOARD, LCD BOARD, LAMP BOARD
CD/System board
Main board
Bracket, CD
CD block section
3 Screws (+BV 3X10)
4
7
6 Screw (+BV 3X10)
6 Screws (+BV 3X10)
1 Wire, Parallel (FFC) (12 core)
2 Wire, Parallel (FFC) (20 core)
5 Wire, Parallel (FFC) (21 core)
Cabinet sub ASSY, Front
Bracket, CD button
LCD board
Switch (2) board
5
2
Bracket (2), CD
1 Screws (+BV 3X10)
4 Screws (+BVTP 2.6X10
)
3 Screws (+P 2.6X6)
Lamp board
LCD board
7
6
Remove solder
3-12. MAIN BOARD, CD/SYSTEM BOARD

– 11 –
3-13. CD BLOCK SECTION
Bracket, CD
CD block section
3
Main board
CD/System boar
d
2 Screws (+BV 3X10)
1 Wire (Flat type) (21core)
<MECHANISM DECK SECTION>
3-14.TC RF BOARD, HEAD RELAY BOARD, BELT (FR/BR), MOTOR (M691)
6 Belt FR
7 Belt BR
2 Remove solder
9 Motor (M691)
Head relay board
3
5
4 Screw
1 Screws
8 Screws
TC RF board

– 12 –
<CD BLOCK SECTION>
3-15.TRAY ASSY, CD
3-17. OPTICAL PICK-UP BLOCK, PICK-UP RELAY BOARD
3-16. LOADING BOARD
3 Screws
(+BV 3X10)
1 Screws
(+BV 3X10
)
5 Wire, Parallel (FFC) (21 core)
(CD/System board : CN701)
2
4
6
4
2
3 Screws (+BV 3X10)
Loading chassis
Plate (L), Side
Cover (L), Side
Cover (R), Side
Plate (R), Side
Slider (R)
Slider (L)
Tray ASSY, CD
1 Screws
(+BV 3X10)
Lid, CD
Tray (Top), CD
1 Screws (+B 2.6X8)
4 Wire, Parallel
(FFC) (21 core)
2
36
5
5
Pick-up relay boar
d
Claw
Claw
Optical pick-up block
Tray (Bottom), CD
CD block section
1 Screws (+BV 3X10)
2
Loading board

– 13 –
SECTION 4
TEST MODE
CD SECTION
1. Entering CD test mode
With the OPERATE button OFF, short JW801 and JW802 on
the LCD board. (You need a moment for the short.)
The LCD display changes as in the diagram and the unit goes
into test mode.
When you press the ^key, the CD rotates and when you press
the ^key again, the CD plays (the track servo comes on)(but
no sound is issued).
Pressing the ^key starts automatic adjustment and the value
changes, but this value is not a problem.
[LCD BOARD] (Conductor side)
2. Exiting test mode
With the unit in test mode, when you press the OPERATE but-
ton to OFF, test mode ends.
3. RF LEVEL and jitter check
Test mode PLAY status
ConnectionP oint: CD/System board (Conductor side)
Check to see that the jitter is less than 9.0 nsec. and RF level is
between 0.55 – 0.85Vp-p.
Í
ALL
SOUND
MEGA BASS
cd
RF level:
0.55–0.85 Vp-p
VOLT/DIV : 200mV (using 10:1 probe)
TIME/DIV : 500ns
oscilloscope
(AC range)
TP (RFO)
TP (VC)
CD TEST MODE
SHORT :TEST MODE
OPEN : NORMAL MODE

– 14 –
4.TRAVERSE SIGNAL check
ConnectionP oint: CD/System board(Conductorside)
Press the FF or FR from 3.
Check to see that the traverse signal level is between 200 to
400mVp-p.
5. RELEASETHETEST MODE
After completed with adjustment, press the OPERATE button to
release the test mode.
Note:
Extend the sweep time
for easier view.
200 – 400mVp-p
AA
BB
A = B
0V
0V
5-1. MECHANICAL ADJUSTMENTS
TAPE RECORDER SECTION
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :record/playback/erase head pinch roller
rubber belts capstan
2. Demagnetize the record/playback head with a head demagne-
tizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
Torque Measurement
Torque Torque Meter Meter Reading
Forward CQ-102C 36 to 61 g • cm
(0.5 to 0.84 oz • inch)
Forward CQ-102C 2 to 6 g • cm
Back Tension (0.028 to 0.083 oz • inch)
Reverse CQ-102RC 36 to 61 g • cm
(0.5 to 0.84 oz • inch)
Reverse CQ-102RC 2 to 6 g • cm
Back Tension (0.028 to 0.083 oz • inch)
FF/REW CQ-201B 61 to 143 g • cm
(0.85 to 1.98 oz • inch)
TapeTension Measurement
Mode Tension Meter Meter Reading
FWD CQ-403A more than 100g
(more than 3.53 oz)
REV CQ-403A more than 100g
(more than 3.53 oz)
5-2. ELECTRICAL ADJUSTMENTS
TAPE RECORDER SECTION 0dB = 0.775V
1. The adjustnemts should be performed in the order in the service
manual. (As a general rule playback circuit adjustment should
be completed beforeming recording circuit adjustment.)
2. The adjustments should be performed for bothe L-CH and R-
CH unless otherwise indicated.
Standard Intput Level
Input terminal LINE IN
source impedance 10kΩ
input signal level 0.5V (–3.8dB)
Standard Output Level
Output terminal LINE OUT
load impedance 47kΩ
output signal level 0.5V (–3.8dB)
TestTape
Type Signal Used for
P-4-A100 10kHz, –10dB Azimuth Adjustment
WS-48B 3kHz, 0dB Tape SpeedAdjustment
SECTION 5
ADJUSTMENTS
oscilloscope
(AC range)
TP (TO)
TP (VC)

– 15 –
Record/Playback/Erase Head Azimuth Adjustment
Procedure:
1. Mode : FWD 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.
3. Phase Check
Mode : FWD playback
4. Change the reverse playback mode and repeat the step 1 to 3.
5. After the adjustment, lock the adjustment screw with suitable
locking compound.
AdjustmentLocation: –record/playback head –
set
LINE OUT
47k
Ω
level mete
r
test tape
P-4-A100
(10kHz, –10dB)
L-CH
peak R-CH
peak
L-CH
peak
R-CH
peak
Screw
position
output
level within
1 dB within
1 dB
screw positio
n
VH
in phase 90
°
45 °
135 °
180 °
good wrong
set
L-CH
R-CH
screen pattern
test tape
P-4-A100
(10kHz, –10dB) Osilloscope
LINE OUT
47k
Ω
47k Ω
Tape Speed Adjustment
Procedure:
– FWD Playback Mode –
1. Set to FWD playback mode.
2. Adjust RV691 so that the frequency counter reading becomes
3,000Hz.
Standar d value : 2,970 to 3,030Hz
3. Set to REV playback mode.
Confirm the frequency should be within the standard value.
4. Confirm the frequency difference between beginning and the
end of tape should be within 1.5% (45Hz).
AdjustmentLocation: TC RFboard
set
test tape
WS-48B
(3kHz, 0dB) frequency counter
LINE OUT
47k
Ω
FWD side REV side
adjustment screw
Mechanism deck
RV691 :
Tape speed adjustment
TC RF board

– 16 –
TUNER SECTION
AM Section
RADIO BAND button : MW or LW
Volume : MIN
FM Section
RADIO BAND button : FM
Volume : MIN
AdjustmentLocation : Tuner board(See page 17)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
MW/LW IF ADJUSTMENT
Adjust for a maximum reading on level meter.
CFT1 450kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display reading on digital
voltmeter.
L4 531kHz 0.65 – 1.05V
CT2 1,611kHz 5.1 – 6.1V
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3–1 621kHz
CT4 1,404kHz
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display reading on digital
voltmeter
CT3 279kHz 5.1 – 5.5V
Confirmation 153kHz 0.6 – 0.8V
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 – 2 162kHz
CT5 261kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display reading on digital
voltmeter
Confirmation 87.5MHz 1.45 – 1.85V
L2 108MHz 3.6 – 4.6V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 87.5MHz
CT1 108MHz
Frequency Coverage Adjustment
ConnectLocation:
[TUNER BOARD] (SIDE B)
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
FM RF signal
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
telescopi
c
antenna
terminal
0.01
µ F
set
47k
Ω
+
–
LINE OUT
level mete
r
+
–
Digital
voltmeter
100 k
Ω
IC2 !ª pin

– 17 – – 19 –– 18 –
Adjustment Location :
L3 – 2 : LW Tracking Adjustment
CT1 : FM Tracking Adjustment
L1 : FM Tracking Adjustment
L3 – 1 : MW Tracking Adjustment
CT5 : LW Tracking Adjustment
CT4 : MW Tracking Adjustment
L2 : FM Frequency Coverage Adjustment
CT3 : LW Frequency Coverage Adjustmen
t
CT2 : MW Frequency
Coverage Adjustment
L4 : MW Frequency
Coverage Adjustment
CFT1 : MW/LW IF Adjustment
[TUNER BOARD] (SIDE A) Pin No. Pin name I/O Description
1 C-SOR I CD DSP command data input.
2 NC – Not used (“L” level).
3 RMC I Remote control signal input.
4 R-MUTE O Tuner mute signal output.
5 C-XRST O CD system reset output.
6 REG-CHK I Regulator voltage check input.
7 C-SENSE 2 I CD-SENSE input.
8 C-CLK O CD DSP command clock output.
9 C-DATA O CD DSP command data output.
10 C-SENSE 1 I CD SENSE input.
11 C-SQCK O CD SUB-Q read out clock output.
12 C-SQSO I CD-SQSO data input.
13 C-MUTE O Mute signal output for DSP (IC702).
14 NC – Not used (OPEN).
15 R-DATA O PLL IC data output.
16 R-CLK O PLL IC clock output.
17 R-CE O PLL IC chip enable output.
18 R-COUNT I PLL IC data input.
19 P-CONT O POWER ON/OFF control output.
20 PL-CONT O Plunger ON/OFF control output.
––––––––––––––––––––––––
21 HALF (M/D) I Cassette half detect input.
––––––––––––––––––––––––––
22 T-HEAD POS I Head position detect input.
23 REC O REC bias ON/OFF control output.
24 PROOF (A) I Half pawl input at A-side.
25 PROOF (B) I Half pawl input at B-side.
26 AMS/INIT I TC AMS signal input/Initial terminal.
27 R-SHIFT O System clock shift output.
28 INPUT 1 O Loading motor control output.
29 INPUT 2 O Loading motor control output.
30 CD-OP/CL I CD tray open/close detect input.
31 KEY1 I Key input terminal.
32 KEY2 I Key input terminal.
33 KEY3 I Key input terminal.
34 KEY4 I Key input terminal.
35 KEY5 I Key input terminal.
36 MO9V-CHK I Motor power supply voltage check.
37 MODEL ID I Model destination setting input.
–––––––––––––––
38 RESET I System Reset terminal.
39 OSC-OUT O System clock oscillator output (4.21MHz).
40 OSC-IN I System clock oscillator input (4.21MHz).
41 GND – Ground terminal.
42 NC – Not used (OPEN).
43 NC – Not used (Ground).
44 V REF I Reference voltage input.
45 GND – Ground terminal.
SECTION 6
DIAGRAMS
6-1. EXPLANATION OF ICTERMINALS
IC801 CXP83232A-010Q (SYSTEM CONTROL) CD/SYSTEM BOARD Pin No. Pin name I/O Description
46 VDDL O LCD drive bias control output.
47 VDD3 O LCD drive bias power supply.
48 VDD2 O LCD drive bias power supply.
49 VDD1 O LCD drive bias power supply.
50 COM0 O LCD common output.
51 COM1 O LCD common output.
52 COM2 O LCD common output.
53 COM3 O LCD common output.
54 – 79 SEG0–SEG25 O LCD segment output.
80 NC – Not used (OPEN).
81 NC – Not used (OPEN).
82 NC – Not used (OPEN).
–––––––––––––––––––––
83 B/L-CONT O Back-light ON/OFF control output.
84 LINE O Function output for LINE.
85 TAPE O Function output for TAPE
–––––––––––––––
86 RADIO O Function output for RADIO
87 T-MOTOR-CONT O Motor control signal output.
88 X-LAT O CD DSP command lach output.
89 VDD – Power supply.
90 NC – Not used (connect to VDD).
91 GND – Ground.
92 CLK OUT O Sub system clock oscillator (32.768kHz).
93 CLK IN I Sub system clock oscillator (32.768kHz).
94 CD O Function output for CD.
95 A-MUTE O Audio mute signal output.
96 VR-DATA O Volume clock output.
97 VR-CLK O Volume clock output.
98 VR-CE O Volume enable output.
99 WP I Wake-up signal input.
100 TAPE END I Tape end detect input.

– 20 – – 22 –– 21 –
ZS-D50
6-2. BLOCK DIAGRAMS (TAPE, MAIN SECTION)
• Signal path.
F: FM
E: PB (L-CH)
a: REC (L-CH)
J: CD

– 23 – – 24 – – 26 –– 25 –
ZS-D50
6-3. BLOCK DIAGRAMS
(TUNER, CD SECTION)
rCircuit Boards Location
SWITCH (1) board
TC RF board
HEAD RELAY board
MAIN board
LCD board
LAMP board
SWITCH (2) board
LOADING board
CD/SYSTEM board
LINE board POWER board
BATTERY (L) board
BATTERY (R) board
TUNER board
INLET board
HEADPHONE board
PICK-UP RELAY board
• Signal path.
F: FM
J: CD