Pioneer DC-111Z User manual

WD) PIONEER
Setvice
PALEY ET
CIRCUIT
DESCRIPTIONS
ORDER NO.
ARP - 814-0
REPAIR & ADJUSTMENTS
STEREO CASSETTE TAPE DECK AMPLIFIER
C-1117
DC-1102
(Silver version of DC-1112Z)
e DC-111Z is the same as the DC-110Z except for the exterior design (color).
e Models DC-111Z and DC-110Z come in seven versions distinguishes as follows:
Applicable model
DC-111Z DC-110Z i
Oo AC 120V only U.S.A
Power requirement Destination
AC 220V (240V)* (Switchable) European continent
a idl
AC 240V (220V)* (Switchable) United Kingdom
AC 110V/120V/240V (Switchable) General market
4
AC 240V only Australia
AC 120V only Canada
AC 220V (240V)* (Switchable) West Gemany
* Change the primary wiring of the power transformer.
This service manual is applicable to the KU, HE, HB, S and YP types.
As to the HE, HB, S and YP types please refer to the page 46.
As to the KC type, please refer to the additional service manual (ARP-813).
As to the HEZ type, please refer to the additional service manual (ARP-815).
Ce manual d’instruction se refer au mode de réglage, en francais. (P36-P40)
Este manual de servicio trata del método adjuste escrito espanol. (P41-P45)
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS [USA] INC. P.O. Box 1760, Long Beach, California 90801 U.S.A.
TEL: [phone], (B00) 237-0424
PIONEER ELECTRONIC [EUROPE] N.V. Keetberglaan 1,2740 Beveren, Belgium TEL: 03/775:28:08
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia
TEL: [phone]
SA: APR. 1985 Printed in Japan

DC-1112/1102
CONTENTS
1. SPECIFICATIONS .......... 00.00.00 cues 2
2. FRONT PANEL FACILITIES ................ 3
3. DISASSEMBLY ......... 0.0.0... 0c ee eee 4
4. PARTS LOCATION .............0000 eee uue 9
Bi “PACKING osca esac pectiaees tie Wain accra acne 11
6. EXPLODED VIEW ............ 000 eee eee 12
7. ELECTRICAL PARTS LIST ................. 18
8. P.C. BOARDS CONNECTION DIAGRAM ..... 21
1.
SPECIFICATIONS
AMPLIFIER SECTION
Continuous
Average
Power
Output
is
25
Watts*
per
channel,
min.,
at
8
ohms
from
40
Hertz
to
20,000
Hertz,
with
no
more
than
0.3%
total
harmonic
distortion.
*Measured
pursuant
to
the
Federal
Trade
Commission's
Trade
Regulation
rules
on
Power
Output
Claims
for
Amplifiers.
Continuous Power Output
40
to
20,000HZ
oo.
eceeeseseeeeceeeeeees
25W
+
25W(T.H.D.
0.3%
8
ohms}
TkHz(DIN)
oo...
--.
32
W
+
32
W(T.H.D.
1%
8
ohms}
1
kHz
(DIN
music
power)
...
..
45W
+
45
W(T.H.D.
1%
8
ohms}
Hum
and
Noise
(IHF,
short-circuited,
A
network)
PHONG?
eovescocteas
crattang
ian
Fader
scan
seaseavivl
Realeceoea
delet
72
dB
Hum
and
Noise
(DIN
continuous
Power/50
mV)
PHONO’
essential
Av
aces
adeat
dcbtecehees
sera
ed
ode
dolce
ob
68
dB/60
dB
Total
Harmonic
Distortion
(40
Hz
to
20,000
Hz,
8
ohms),
from
CD/VIDEO
12.5
Watts
per
channel
power
output
..........0000ececcces
No
more
than
0.2%
9. SCHEMATIC DIAGRAM..................0. 25
10. BLOCK DIAGRAM ................0000a ee 29
11. CIRCUIT DESCRIPTIONS ................. 30
12. ADJUSTMENTS ........... 0... cece ee ees 31
REGIAGE ik GaAs costar cde wey eects cima ed 36
BIUSTE” shsctig abe bat eit ile a teatereeehd Bete s 41
13.
FOR
HE,
HB,
S
AND
YP
TYPES...........
46
14. SAFETY INFORMATION .................. 48
Tape Deck Section
PSV
BRGITIS
wedi
sic
rexvhas
srceatn
bos
Cha
acces
cove
andleedca
Shee
4
track,
2-channel
stereo
Heads:
ict
ctcses
tetincesodeseeeaeh
et
“Hard
Permalloy’’
recording/
playback
head
x
1
“Ferrite”
erasing
head
x
1
Rajon ee scar aapnesieeuuic tacstonnes se rauceuepavuauasates feteetmteenees DC servo motor x 1
No more than 0.08% (WRMS)
No more than +0.20% (DIN)
Fast Winding Time ................000cc00eeee Approximately 115 seconds (C-60 tape)
Frequency Response
—20 dB recording:
Norimal tapes. vid ca sansscetge cisbuncsisgesate eho sohedaseatace aadork 35 to 13,000 Hz
Metal tapes: ni .sis caccteiesdcacaveasi ona sader ase cu eset erevel chougeeuee 35 to 15,000Hz
Signal-to-Noise Ratio
Dolby: NR OFB: aces csesaessaeegeseceteusane cdedddeccuse sin shacetasiees More than 55 dB
Noise Reduction Effect
Dolby NR Btype ON uu... eee More than 10 dB (at 5 kHz)
Furnished Parts
Operating Instructions .........0::cccccccccceccessccussecetsssseccesnsnusansesaceveesersinens 1
Miscellaneous
Power requirements
KU and KC models ......... cece cceseseccctsvescceeseessarausaeascees AC 120 V, 60 Hz
HE model ............. AC 220 V, 50/60Hz
HB and YP models AC 240 V, 50/60 Hz
S
and
S/G
models
..........
AC
110
V/120
V/220
V/240
V,
50/60
Hz
(switchable)
Power Consumption
KUO) rset estas eek cal pete eens be nae oi 199 W
KO MOdel: 0. oo: ester dnereadards deck idbaedd cds iantaacaidqevea eg tietaceeacde ees 199 W
HE, HB, and YP models . . 270 W
SANG: S/GiMOdels 35.6035) eevee ates A ettacs Ses WEED douse dais tect hieste 199 W
DMCS:
6
cocse
act
daon
vv
ciserceven
nn
Shasaveesawcdes
420(W)
x
188(H)
x
224
(D)
mm
16-9/16(W) x 7-6/16(H) x 8-13/16(D) in
Weight (without package) ...............cccccceeeeseeseeeecececseeraus 5.5 kg (12 Ib 2 oz)

QUESTIONNAIRE MODEL
One Model per questionnaire
Dear Servicer,
Thank you for your cooperation in the post-sale service of Pioneer products.
This questionnaire is used as a tool to improve the serviceability of our products and service manuals.
Please evaluate this model and service manual by answering the following questions. Your ideas may be
realized in our future products. Your answers will be appreciated. Thank you.
PIONEER ELECTRONIC CORP.
T. Nakagawa, Manager, Service Section, International Division
1. SERVICING EVALUATION Circle applicable number: Good Fair Poor
Disassembly /Re-assembly:
b. Circuit Checks: 1 gS 8 4 8G
c. Replacement of Parts: 1 2 3 *4 *5
d. Adjustment (s): 1 2. 8 ¥4 5
* If (4) or (5) was circled, please be specific.

e. Your advice, opinion or ideas related to servicing this product.
SERVICE MANUAL EVALUATION
Circuit & Mechanism Description
Circuit Diagram
OTHER
Please describe other areas of servicing which you may find difficult.
Completed by :
Company Name :
Address :
City/State/Zip :
Please
send
this
form
filled
to
the
distributor
in
your
country.

2. FRONT PANEL FACILITIES
@ POWER indicator
@ POWER switch
@ HEADPHONES jack
@ GRAPHIC EQUALIZER controls
By operating these five controls, equalization effects can be added to program
source or tape playback sounds.
@ BALANCE control
@ FUNCTION switches
TAPE ( 00 ): Push when playing back tapes.
CD/VIDEO ( 0° ): Push when listening to a component connected to the
CD/VIDEO terminals.
DC-1112/110Z
TUNER ( * }: Push when listening to broadcasts on the tuner.
PHONO ( @ ): Push when playing records on the turntable.
VOLUME control
REC switch ( © )
PLAY switch ( > }
REW switch ( < )
FF switch ( > )
e@ee86 0 8
PAUSE switch ( 0 )
@ STOP/ EJECT switch ( ~ )
@ TAPE COUNTER
@ RESET button
Push this button to reset the tape counter display to 000.
@ REC indicator
This lights during the recording mode.
@ *DOLBY NR switch
Push this switch to ON when recording with the built-in Dolby noise reduction
system (B type), and when playing back tapes which have been
recorded using the system.
aia h 1 hhh tha TA AAAS AUT A TATA TATA
*Noise Reduction manufactured under ticense from Dolby Laboratories Licens-
ing Corporation.
“Dolby” and the double-D symbol are trademarks of the Dolby Laboratories
Licensing Corporation.
Iai 1h ih 11h 1A ThA AA TAA AAA AAA ATA ATA AACA TOT

DC-1112/110Z
3. DISASSEMBLY
Cassette Replacement Procedures
1.
2.
3.
4
Remove 7 pieces of screw dd).
Remove Bonnet case.
Remove 2 pieces of screw Q) and | piece of nut Q).
Push the claw at the bottom of chassis, remove the
Front panel assembly, and pull out toward you.
Remove the LED assembly (A) and (B) from the
Front panel assembly.
Remove 6 pieces of screw GB). and enable the Power
amplifier assembly to move upward. (See Fig. 3-2)
Front panel ——____
assembly
Knob {VOLUME}
ge
10.
Fig. 3-1
Remove connectors J7, J11 and J21 of the wiring
coming out of the Tape transport unit. (Separate the
Front panel assembly from the main body.)
Open the Cassette door. (See Fig. 3-3)
Remove 4 pieces of screw (4).
Remove Counter belt from Tape counter, and hook
onto the Tape transport unit.
Remove the Tape transport unit from the Front
panel assembly.
LED assembly (A)

DC-1112/110Z
Power amplifier assembly
Connector J21 SS
ea Connector J11
eae Connector J7
/
Tape transport unit
Fig. 3-2
Cassette door
Front
panel
assem
bly
Tape transport unit
Counter belt
Fig. 3-3

DC-1112/110Z
COMPONENT PARTS REPLACEMENT
PROCEDURES
Replacement of Motor
1. Remove lead wire of motor terminal. 8. While applying a Belt to the flywheel side, attach
2.
Remove
set
screw
(1)
and
detach
Motor
holder.
Motor
plate
to
Tape
transport
unit.
3.
Remove
2
set
screws
(2),
and
detach
the
Motor.
9.
Apply
Belt
to
driving
pulley
and
pulley.
4. Pull out Motor pulley from Motor. 10. Solder lead wire to motor terminal.
5. Attach Motor pulley to new motor. 11. Fasten securely head lead and control lead with
6. Adjust the height of Motor pulley. (see Fig. 3-4-1) binder.
7. Attach Motor to Motor holder. 12. Adjust the tape speed.
Leadwire
Tape transport unit
Motor holder
Motor pulley
Motor
Fig. 3-4

DC-1112/110Z
4. Apply belt to driving pulley and pulley.
Fasten securely head lead and control lead with
binder.
6. Adjust the tape speed.
Replacement of Belt
1.
Remove
set
screw
(1)
and
detach
Motor
holder
the
Tape
transport
unit.
2.
Replace
the
old
belt
with
a
new
one.
3.
While
applying
the
Belt
on
the
flywheel
side,
attach
Motor
holder
to
the
Tape
transport
unit.
my
Motor holder
Tape transport unit
Fig. 3-5

DC-1112/1102Z
Replacement of Head
1. Detach cassette knob. 7. Check the running of tape.
2. Remove head lead from head. 8. Perform azimuth adjustment.
3. Remove set screw qd) of head. 9. Perform bias adjustment.
4. Remove former head and install a new one.
5. Solder the head lead while taking precaution not to
touch the wirings.
6. Attach cassette knob.
Head lead wires
Cassette knob
REC/PB head Erase head
Erase head
\
Agta
te REC/PB head
Fig. 3-6