Pioneer KEH-3200QRUC User manual

WY) PIONEER’
The Art of Entertainment
Service
ime
c/Manual |" ae
CRT1426
CASSETTE CAR STEREO WITH FM/AM ELECTRONIC TUNER
ahi
OOGR ..
KEH-22000R UC
KER-3250Q0R $=.
KER-2250G0R =:
KEH-1250
Note:
© See the separate manual CX-197 (CRT1328) for the cassette mechanism description.
@ Dolby noise reduction manufactured under license from Dolby Laboratories Licensing
Corporation. “Dolby” and the double-D symbol are trademarks of Dolby Laboratories
Licensing Corporation.
@ Whenever a cord assembly may be used for repairing, do not fail to employ the cord assembly de-
signed for the related part.
Do not apply any cord assembly designed for a different part.
CONTENTS
I. SPECIFICATIONS: ++++-++rcesreececee ern ees 2 14. SCHEMATIC CIRCUIT DIAGRAM (KEH-2250QR) - +44
2. USING THE RADIO: +++ ++ seer ce er eee cee ees 4 15. CONNECTION DIAGRAM (KEH-2250QR)---++++++ 47
3. USING THE TAPE DECK+++++++sseeeeeeeeeees 6 16. CONNECTION DIAGRAM (KEH-1250) --+-++++++- 51
4, CONNECTIONS: + +++ cesses reece cece cee cec ens 7 17. SCHEMATIC CIRCUIT DIAGRAM (KEH-1250)---+-55
Oe DISASSEMBLY: +++s+esereerseeecceees sees 10 18. EXPLODED VIEW (KEH-3200QR, KEH-3250QR, - --58
6. ADJUSTMENT +--+ ++ res seere sees ewevenseses 12 KEH-2200QR, KEH-2250QR)
7. BLOCK DIAGRAM+ ++ +++ ree eer ese eeeeee eens 15 19. EXPLODED VIEW (KEH-1250) +++ +++++eee reer 62
8. CONNECTION DI AGRAM(KEH-3200QR)---++::-> 23 20. CASSETTE MECHANISM ASSY EXPLODED VIEW: -65
9. SCHEMATIC CIRCUIT DIAGRAM (KEH-3200QR) - +27 (KEH-3200QR, KEH-3250QR)
10. SCHEMATIC CIRCUIT DIAGRAM (KEH-3250QR) --30 21. CASSETTE MECHANISM ASSY EXPLODED VIEW--69
11. CONNECTION DI AGRAM(KEH-3250QR) -+---:+>> 33 (KEH-2200QR, KEH-2250QR, KEH-1250)
12. CONNECTION DI AGRAM(KEH-2200QR)-+:-+---+-> 37 = 22. PACKING METHOD--++++++++eseeeee cee seees 73
13, SCHEMATIC CIRCUIT DIAGRAM(KEH-2200QR) --41 23. ELECTRICAL PARTS LIST+++++++-+++eeeeees 75
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760, Long Beach, California 90801 U.S.A.
PIONEER ELECTRONICS OF CANADA, INC. 505 Cochrane Drive, Markham, Oniario L3R 8E3 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia TEL: [03] 580-9911
© PIONEER ELECTRONIC CORPORATION 1991 any ase naaeatas

KEH-3200QR
SAFETY INFORMATION (UC MODEL)
CAUTION
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment and tools, and have been trained to properly and
safely repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void
the warranty. If you are not qualified to perform the repair of this product properly and safely, you should
not risk trying to do so and refer the repair to a qualified service technician.
WARNING
Lead in solder used in this product is listed by the California Health and Welfare agency as a known
reproductive toxicant which may cause birth defects or other reproductive harm (California Health & Safety
Code, Section 25249.5). When servicing or handling circuit boards and other components which contain
lead in solder, avoid unprotected skin contact with the solder. Also, when soldering do not inhale any
smoke or fumes produced.
1. SPECIFICATIONS
@ KEH-3200QR, KEH-22000R
General
Power source
Grounding system ...
Max, current consump:
. 14.4 V DC (10.8
= ats allowable)
jlegative type
nt ig
Dimensions (chassis) .. W) x 50(H) x wD) mm
1H ‘W) Xx z(t) X 5-1/2(D) in.]
(NOSE). anvedes aevcsncde vege devecesderereteeees i88(W) x Bt x 16( 3} mim
. [7-3/8(W) X 2-1/4(H) X 5/ {f ) in]
{mounting bracket) ...........c2seee eee eee 182(W) X 52(H) X fgg »} mm
7-1/8{W) X 2(H) X 6(D) in.
WEIGH ......cscccscscseveacereveceecsceenseeneesneassessneneeenseneneeeenees 1.4 kg (3.1 Ibs.
Amplifier
Continuous power output is 10 W per channel min. into 4 ohms, both channels
driven 50 to 15,000 Hz with no more than 5% THD.
Maximum power Output ........ccecsree ese eenereeseeeeeee rs 25 W_X 2/15 W X 4 (EIAJ
Load impedance .........c cece ... 4Q (4 — 8 Q allowable
Preout output level/IMpedance ...........eerceeeeeene tenner treats rneenes 500 mV/100
Tone controls (bass) ...........5. +10 dB (100 Hz
UT) £10 dB (10 kHz!
. +8 dB (100 Hz) (volume: —30 dB;
{treble}
Loudness contour ........cseee eee
Compact cassette tape (C-30 — C-90)
76cm/sec. (+ 0.14cm/sec., — 0.05em/sec.)
Approx. 100 sec. for C-60
7 ++. 0.13% ea
Wow & flutter ............
Frequency response (KEH-320 17,000 Hz (+3 dB
; (KEH-22000R) 40 — 14,000 Hz (+3 dB
StereO SCParatiOn ....... ce cceeeceeeesee eee eneneeteeeeneeseneasenseseesnreneenaeeneges 45d
Signal-to-noise ratio
KEH-32000R) .....sececeeeeeseeenees Metal: Dolby B NR IN: 63 dB (IHF-A network,
Dolby NR OUT: 55 dB {IHF-A network
(KEH-22000R) ...... cece ceeeceereesececeeneeeeeesseteeeetnenens 52 dB (IHF-A network
FM tuner
FreQUENCY FANGE ....... eee ce cee ee ese e ee eeee ete nen ecenereeeneeerees 87.9 — 107.9 MHz
Usable sensitivity . ah
V/75 2, mono, S/N: 30 dB)
50 dB quieting sensitivit
16 dBt (12 NS Q, mono
Signal-to-noise ratio .......sccecsesese ee neceeeassscenceetseseeees 70 dB (iHF-A network
Distortion .........04- 0.3% (at 65 dBf, 1 kHz, stereo
Frequency response 30 — 15,000 Hz (+3 dB,
Stereo separation .
Selectivity .........
Three-signal interm
KEH- 300K} es
KEH-22000R) ..
AM tuner
Frequency range
Usable sensitivi
Selectivity ....
th 5,
. 40 dB (at 65 dBf, 1 kHz
ubtevetennns « 70 dB (2ACA) (+400 kHz,
al level)
. 50 dBf (two undesire signal level: 110 dB
. 55 dBf (two undesire signal jevel: 110 dBf
530 — 1,710 kHz
‘5 dB) (S/N: 20 dB
50 dB (+10 kHz
These specifications were determined and are presented in accordance with specifi-
cation standards established by the Ad Hoc Committee of Car Stereo Manufacturers.
Note:
Specifications and the design are subject to possible modification without notice
due to improvements.
@ KEH-32500R, KEH-22500R
General
Power source ............ 14.4 V DC (10.8 — 15.6 V allowable)
Grounding system . Negative type
Max. current consum whats see bowgoeee tances F.0A
Dimensions jones! 1 we x 4
nose) . aegs 188(W) X 58(H) < 16(D) mm
(mounti
Amplifier
Continuous power output is 10 W per channel min. into 4 ohms, both channels
driven 50 to 15,000 Hz with no more than 5% THD.
Maximum power output .............cseee ean serbeeeeddudee 25 W X 2/15 W x 4 (EIAJ)
Continuous power output .. 11 W X 2 (1% dist. at 1 kHz)
Load impedance ............ccctescssesseneneees ... 4Q (4— 8 Q allowable)
Preout output level/Impedance (KEH-3250QR). .............cceeeeeeeeee 500 mV/100 2
Tone controls (bass) ..........cceeseeseeeeeneee . +10 dB (100 Hz)
(treble) ...c. ccc ececeeeeeeeeeenereeeeereetesseneets ees tecees +10 dB (10 kHz)
Loudness CONTOUF .......... ec cee cece eeeene ens eeaeees +8 dB (100 Hz) (volume: —-30 dB)
Tape player
Tape Compact cassette tape (C-30 — C-90)
Tape speed ...... .4.76cm/sec. (+0.14em/sec., — 0.05em/sec.)
Fast forward/rewind time ..........cccececeererenereesaseeee Approx. 100 sec. for C-60
Wow & flutter .......ccccesececrececs eee eeeeneeeeneneneetenseeen ser nacarsees 0.13% (WRMS)
Frequency response (KEH-3250QR) . . Metal: 40 — 17,000 Hz (+3 dB)
(KEH-2250QR) ........ccceceeeeeseeeeeeees 40 — 14,000 Hz (+3 dB)
Stereo Separation ......ccceccvcscececcencnsenceneeeeenseeseneen eee aeeeeeensenenee eee 45 dB
Signal-to-noise ratio
KEH-32500R) .......:2cseseeereenueee Metal: Dolby B NR IN: 63 dB (IEC-A network)
Dolby NR OUT: 55 dB (IEC-A network)
(KEH-22500OR) ............cccceveccacssecvacscosracenencesseasane 52 dB (IEC-A network)
FM tuner
Fr@QUeNCy ANGE ......ceeecce esse eee eetteenseccrectseeeenseneseeescenares 87.5 — 108 MHz
Usable sensitivity
50 dB quieting sensitivi
Signal-to-noise ratio ...
Distortion .........-
Frequency response
Stereo separation ....
AM tuner
. 11.dBf (1.0 nV/75 Q, mono, S/N: 30 dB)
is sionals atta 16 dBf (1.7 uV/75 Q, mono)
daa bauie sis 70 dB {IEC-A network)
. 0.3% {at 65 dBf, 1 kHz, stereo)
30 — 15,000 Hz (+3 dB)
40 dB (at 65 dBf, 1 kHz)
Frequency range ......... cece eeeeeeeecceceeeeneeeenenrereeeeeense 531 — 1,602 kHz (9 kHz)
530 — 1,710 kHz (10 kHz)
Usable sensitivity ...........cccsesecesceuseencnrensenesenees 18 uV (25 dB) (S/N: 20 dB)
SOlACtHVIY ois cciecisesies cones ssenebied occas asedheass aveeuesat ease cees erase 50 dB (+9 kHz)
50 dB (+10 kHz)
Note:
Specifications and the design are subject to possible modification without notice
due to improvements.

@ KEH-1250
General
POWEr SOULCE 0... cceseeeeeu seen ees 14.4 V DC (10.8 — 15.6 V allowable)
Grounding SYSTEM .......ccsseecseeceeceeececneeaeerersereseeeerens Negative type
Max. Current CONSUMPTION 20.00... cece ceceeeeneeen eee eessseeeseneneas 7.0A
Dimensions (chassis) ...........:0:00000 178(W) X 50(H) X 147.5(D) mm
(nose) .... ... 170(W) X 46(H) X 12(D) mm
WEIGH iscecdete nce duced eveveesscentcn iadeste Deitvadidenesosshadeesestssoasyene 1.3 kg
Amplifier
Continuous power output is 10 W per channel min. into 4 ohms,
both channels driven 50 to 15,000 Hz with no more than 5% THD.
Maximum power Output .......... ec eeeeeee 25 W X 2/15 W X 4 (EIAJ)
Continuous power output ............. 11 W X 2 (1% dist. at 1 kHz)
Load impedance ..........cesssesceseeenssenesereeree 4Q (4—8 Q allowable)
LOUCNESS CONTOUN .......csccecesecteeeeeeneseeveaseeceeeseeeeees +8 dB (100 Hz)
(volume: —30 dB)
Tape player
TA D6 con scvesevesetuievvenbeezocest sane Compact cassette tape (C-30 — C-90)
Tape speed .........0 4.76cm/sec. (+ 0.14cm/sec., — 0.05em/sec.)
Fast forward/rewind time ..........:eeeeeeeeee Approx. 100 sec. for C-60
WOW. SC TUTEr vccsccscocisesccesecsoseecserssncverecnseosceeseeccen 0.13% (WRMS)
Frequency response .. .. 40 — 14,000 Hz (+3 dB)
Stereo SEPArAatiOn .......cccecseeceeeereeecceeceeeeeeeeeeseveessesssaneesneree 45 dB
Signal-to-noise ratio .......ccccccereeeeeeeeeeeeeeree 52 dB (IEC-A network)
@ Features
@ KEH-32000R, KEH-22000R
@ Built-in highly sensitive “Super Tuner” for automatic control of
stereo separation, muting and frequency characteristics to match
the strength of the FM signal.
@ The Best Stations Memory automatically memorizes the six best
(strongest) stations in the six preset buttons in the order of their
strength.
@ Preset scan tuning for sequential recall of preset frequencies.
@ Auto reverse function eliminates the need to turn the cassette
over and allows uninterrupted playback.
@ Built-in Dolby B NR for reduced tape hiss.
(This feature is provided for the KEH-32000R.)
@ Music search function allows automatic playback from the begin-
ning of the selection being played or the beginning of the next
selection.
(This feature is provided for the KEH-3200Q0R.)
@ 25 W X 2 maximum output for sound with power to spare. Com-
bination with separately available power amp unit allows con-
figuration of a powerful 4-speaker system.
@ The “Quick Release Mounting Bracket”, facilitates mounting and
dismounting of the car stereo and serves to protect the unit from
theft.
@ Dolby noise reduction manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol OO are trademarks of Dolby Laboratories
Licensing Corporation.
@ KEH-32500R, KEH-22500R
@ Built-in highly sensitive “Super Tuner” for automatic contro! of
stereo separation, muting and frequency characteristics to match
the strength of the FM signal.
@ The Best Stations Memory automatically memorizes the six best
(strongest) stations in the six preset buttons in the order of their
strength.
@ Preset scan tuning for sequential recall of preset frequencies.
@ Auto reverse function eliminates the need to turn the cassette
over and allows uninterrupted playback.
FM tuner
FreQUENCY TANGE cscscrciesesceseceasdaseceserecccgesacsscenesees 87.5 — 108 MHz
Usable sensitivity ............. 11 dB (1.0 uV/75 Q, mono, S/N: 30 dB)
50 dB quieting sensitivity ...............0 16 dBf (1.7 uV/75 Q, mono}
Signal-to-noise ratio ........ccccceeceeeeeeeeeeneeee ee 70 dB (IEC-A network)
DIStOMtiON®: <6i0d..5) cescedssoescdecceocowadecete 0.3% (at 65 dBf, 1 kHz, stereo)
30 — 15,000 Hz (+3 dB)
40 dB (at 65 dBf, 1 kHz)
Frequency response ..
Stereo separation .......
AM tuner
Frequency range .....cccesscccseecsecceseeeneeeeseses 531 — 1,602 kHz (9 kHz)
530 — 1,710 kHz (10 kHz)
Usable sensitivity ..........ccccecceeceneeeeeeees 18 uv (25 dB) (S/N: 20 dB)
S@lECHIVItY -civecseseccucedebceercacnbaae sexs aidiaassscquevacesenatsss 50 dB (+9 kHz)
50 dB (+10 kHz)
Note:
Specifications and the design are subject to possible modification
without notice due to improvements.
® Built-in Dolby B NR for reduced tape hiss.
(This feature is provided for the KEH-32500R.)
@ Music search function allows automatic playback from the begin-
ning of the selection being played or the beginning of the next
selection.
(This feature is provided for the KEH-32500R.)
@ 25W X 2 maximum output for sound with power to spare. Com-
bination with separately available power amp unit allows con-
figuration of a powerful 4-speaker system.
(This feature is provided for the KEH-32500R.)
@ The “Quick Release Mounting Bracket”, facilitates mounting and
dismounting of the car stereo and serves to protect the unit from
theft.
@ Dolby noise reduction manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol DU are trademarks of Dolby Laboratories
Licensing Corporation.
@ KEH-1250
@ Built-in highly sensitive “Super Tuner” for automatic control of
stereo separation, muting and frequency characteristics to match
the strength of the FM signal.
@ The Best Stations Memory automatically memorizes the six best
(strongest) stations in the six preset buttons in the order of their
strength.
@ Preset scan tuning for sequential recall of preset frequencies.
®@ Auto reverse function eliminates the need to turn the cassette
over and allows uninterrupted playback.
@ Choice of either 4-speaker or 2-speaker system is possible. When
the 4-speaker system (15 W X 4) is used, volume of front and rear
speakers can be adjusted independently, for optimum sound bal-
ance. The 2-speaker system (25 W X 2) provides more than
enough power for clear, high-fidelity playback.

2. USING THE RADIO
@ KEH-32000R, KEH-22000R, KEH-3250QR, KEH-22500R
Pop-up button Preset
KEH-32000R
Fader Bass Treble Display
Preset scan Best stations memory
Local station
Volume/balance/loudness/
power switch (KEH-32000R, KEH-22000R, KEH-32500R)
Volume /balance power switch (KEH-2250Q0R)
Loudness (KEH-3200QR, KEH-22000R, KEH-32500R)
Seek Frequency
Fi toc SEEK
Band Preset number
Stereo
@ KEH-1250
Band Tuning Preset
@ PIONEER
CARBETTE RECEIVER
Balance Tone
Best stations memory
Local station
Volume/power switch
Preset scan
a
Seek * Frequency
Local
Stereo
Band Preset number
®@ Before attempting operation...
@ Set the fader control to the upright position.
1. Turning the power switch to the right causes power to switch ON
and the current frequency to appear on the display.
@ Since the set is designed preferentially for tape play, eject a
cassette tape, if mounted, before operating the radio.
2. Press the band switch to select the band.
3. Press both ends of tuning button and the seek tuning indicator
will appear on the display.
4. Press either the left or right side of the tuning button to tune in
the desired frequency. (Pressing the right side will increase the
frequency.)
5. Adjust the volume and balance. To adjust the balance, first pull
the knob until a click is heard. After setting to the desired level,
push the knob in again to its original position.
6. Adjust the tone.
@ To enter a frequency into the preset memory...
7. Hold down one of the preset buttons (1-6) for approximately two
seconds. The frequency is stored in memory (assigned to the
preset button pressed) once the preset number stops flashing on
the display.
Six FM1 frequencies, six FM2 frequencies, six FM3 frequencies
and six AM frequencies can be entered.
@ Best Stations Memory Button
Automatically tunes strong frequencies and assigns them to preset
buttons 1 through 6 for one-touch automatic tuning. The best sta-
tions memory function is activated by pressing this button for ap-
proximately 2 seconds. The best stations memory function is indi-
cated by ——— flashing on the display, and this function can be
canceled by pressing the band switch. The frequency display re-
turns once the best stations memory function is complete. The fre-
quency displayed at this time is of the strongest station assigned to
preset button 1 by the best stations memory function.
© 6 best (strongest) frequencies are memorized in the 6 preset but-
tons in the order of their strength, the strongest one being as-
signed to preset button 1.
@ The frequencies previously assigned to the preset buttons are re-
tained when 6 frequencies cannot be located.
@ The best stations memory is in operation while ——— is flashing
on the display.
© Local Station Switch
Pressing this switch increases the seek threshold level so that only
relatively strong stations can be tuned in (local indicator will illumi-
nate on the display). Local seek threshold level can be selected
among four levels for FM and two levels for AM.
Holding this switch down for approximately 2 seconds and then
pressing the right side of the tuning button changes the display
from L-1, L-2, L-3 to L-4. Pressing the left side of the tuning button
changes the display from L-4, L-3, L-2 to L-1 (L-1 and L-2 for AM).
The bigger the number, the higher the seek threshold becomes and
only relatively strong stations can be tuned in.

®@ Fader Control
This control is used to adjust the balance between the front and rear
speakers when using a 4-speaker system. Turning the control to the
right decreases the volume of the rear speakers, while turning it to
the left decreases the volume of the front speakers. With 2-speaker
systems, set this control to the upright position.
A considerable amount of sound will continue to be produced from speakers of a
4-speaker system which have been cut by setting the fader control either to the
front speakers or rear speakers. This is normal and does not indicate malfunction.
Important (KEH-32000R, KEH-22000R, KEH-32500R)
The output of power amp. (sold separately) is not affected by fader control when
this unit is linked with the power amp.
@ Loudness Switch (KEH-32000R, KEH-2200QR, KEH-3250QR)
When playing back a tape or listening to the radio at low volume,
the low tone is emphasized and more clearly heard by pressing this
switch.
‘@ Auto-Loudness (KEH-22500R, KEH-1250)
When playing back a tape or listening to the radio at low volume,
the low tone is automatically emphasized.
Seek Tuning
Press both ends of tuning button and tuning to the next higher or
lower broadcast on the band can be accomplished automatically by
simply pressing either the right or left side of the tuning button. FM
frequencies change in 0.2 MHz steps while those in the AM band
change in 10 kHz steps. (KEH-3200QR, KEH-2200QR)
FM frequencies change in 50 kHz steps while those in the AM
band change in 9 kHz steps.(KEH-3250QR, KEH-2250QR, KEH-1250)
@ AM frequencies are tuned in 10 kHz steps after the tuning steps are changed.
Preset Scan Tuning
Pressing the preset scan button (CH indicator flashes) causes pre-
viously stored frequencies to be tuned in sequentially for eight sec-
onds each. Press again when the desired frequency is tuned in to
cancel preset scan tuning.
Preset Tuning
Pressing the preset button instantly tunes in the frequency pro-
grammed in the memory for that button.
Manual Tuning
When manual tuning is employed, FM frequencies change in 0.2
MHz steps while AM frequencies change in 10 kHz steps.
(KEH-3200QR, KEH-2200QR)
When manual tuning is employed, FM frequencies change in 50 kHz
steps while AM frequencies change in 9 kHz steps.
(KEH-3250QR, KEH-2250QR, KEH-1250)
© AM frequencies are tuned in 10 kHz steps after the tuning steps are changed.
1, Press both ends of tuning button and the seek tuning indicator
will disappear from the display.
2. Change the frequency by pressing either the left or right side of
the tuning button. Pressing the button once will change the fre-
quency one step (see above). Continuously depressing either
side of the button will successively change the frequency at the
prescribed step.
KEH-3200GR
®@ Pop-up button (KEH-32000R, KEH-2200QR, KEH-32500R,
KEH-2250QR)
When the quickrelease handie is on the bottom, push the button to
move it up slightly. Push it when you remove the unit from the dash-
board.
The button works only when the handle lock is released.
Before removing this unit from your vehicle, be sure to remove cassette tapes and
make sure that radio power is switched OFF.

KEH-3200QR
3. USING THE TAPE DECK
@ KEH-32000R, KEH-22000R, KEH-3250QR, KEH-22500R
Pop-up button Fast forward, rewind/ ® Before attempting operation...
direction change @ Set the fader control to the upright position.
Eject Ce 1. Turning the power switch to the right causes power to switch ON.
2. Loading a cassette tape into the load slot causes playback to
begin automatically.
3. Adjust the volume and balance. To adjust the balance, first pull
the knob until a click is heard. After setting to the desired level,
vote Oraoma (Oe) @) push the knob in again to its original position.
4. Adjust the tone.
Q 5. When tape playback reaches the end of the tape, playback will
or ca a automatically switch from the side being played to the opposite
side (ie. Side A to Side B or vice versa) (Auto-reverse). To eject
Display KEH-32000R the tape during playback, press the eject button.
1
Fader Bass Treble e@ A loose or warped label on a cassette ta i i j Q
7 ; pe may interfece with the eject mechan
Dolby B NR (KEH-32000R, KEH-32500R) ism of the unit or cause the cassette to become jammed in the unit. Avoid using
such tapes or remove such labels from the cassette before attempting use.
©
rey
SES) (H
Tape select (KEH-32000R, KEH-32500R) @ Do not try to eject the cassette immediately after insertion, as it will cause mal-
: function. Wait a few seconds.
Music search (KEH-3200QR, KEH-32500R) @ Loose tapes should be rewound with the aid of a pencil and unevenly wound
Volume/balance/loudness/ tapes rewound with the use of the fast forward function.
power switch (KEH-32000R, KEH-22000R, KEH-3250QR) e@ Be Sure to eject the tape when the vehicle’s ignition is turned OFF. Leaving the
Volume/balance/ power switch (KEH-22500R) ue unit can deform the pinch roller causing wow and flutter during tape
Music search (KEH-32000R, KEH-32500R) @ Fast Forward/Rewind
Loudness (KEH-32000R, Direction Since the transport can be in either direction, both the left and right
high-speed tape transport buttons can be regarded as fast forward/
rewind buttons.
For fast forward, press the high-speed tape transport button that
corresponds to the direction that is shown by the direction indicator.
When the end of the tape is reached, playback will automatically
begin from the opposite side of the tape (Auto-reverse).
Metal (KEH-32000R, KEH:32500R) Dolby B NR (KEH-32000R, KEH-32500R) For rewind, press the button that is opposite that of the direction
shown by the direction indicator. When the end of the tape is
reached, playback will automatically begin from the beginning of
; the same side of the tape (Auto-replay).
@
KEH-1250
Fast
forward
and
rewind
can
be
terminated
by
pressing
the
respec-
tive
opposite
high-speed
tape
transport
button.
@ Direction Change
Push the fast forward and rewind buttons together to switch from
one side of the tape to the other (from Side A to Side B or vice
versa).
@ Dolby B NR Switch (KEH-32000R, KEH-3250QR)
Press when playing a tape recorded with Dolby NR.
@ Tape Select Switch (KEH-32000R, KEH-3250QR)
This switch is used to switch to the proper mode for the tape being
used and should be depressed when using chrome or metal tapes.
Music Search (KEH-3200QR, KEH-3250QR)
@ Returning to the beginning of selection A
KEH-22000R,
KEH-3250QR)
Fast forward, rewind/direction change
Feet Balance «Tong Piepiey Press the music search button and then the high-speed tape trans-
: port button for the direction opposite that is shown by the direction
Molumeipeder sien indicator. Playback will automatically start from the beginning of se-
lection A.
@ Moving from selection A to selection B
Press the music search button and then the high-speed tape trans-
port button that corresponds to the direction shown by the direction
indicator. Playback will automatically start from the beginning of se-
lection B.
To enable regular fast forward/rewind operations, press the music search button
again to turn the function OFF. The following errors will cause the music search
function to operate improperly, even though the unit is not malfunctioning.
@ Unrecorded “blank” portions between selections less than 4 seconds — the
blank portion cannot be detected by the unit.
@ Pauses in recorded conversations longer than 4 seconds — the unit reads these
as blanks between selections.
© Portions recorded at very low volume for more than 4 seconds ~ the unit reads
these as blanks between selections.
Direction

Current selection Next selection
ul y
Blank space (over 4 seconds)
Rewind Fast forward
4. CONNECTIONS
Note:
To avoid shorts in the electrical system, be sure to disconnect the
battery © cable before beginning installation.
Replace fuses only with the types stipulated on the fuse holder.
Be sure to properly connect the color coded leads. Failure to do
so can cause malfunctions.
Cover unused terminals with tape to prevent electrical shorts.
Since a unique BPTL circuit is employed, never wire so the
speaker leads are directly grounded or the left and right speaker
© leads are common.
Speakers connected to this unit must be a high-power type pos-
sessing maximum input of at least 25 W and impedance of 4 to 8
ohms. Connecting speakers with output and/or impedance
values other than those noted here can damage the speakers.
Refer to the power amp owner’s manual when connecting a
power amp (sold separately) to the RCA pin jack. (KEH-3200QR,
KEH-2200QR, KEH-3250QR)
When the power amp is being linked with this system, be sure
not to connect the blue lead to the amp’s power terminal. Like-
wise, when linking this system with the auto-antenna, do not
connect to power terminal for the antenna. Such connection can
make overcurrent cause malfunctions.
Black (ground) | To vehicle (metal) body.
If this unit is combined with a power amp,
connect its blue lead to the blue lead (sys-
tem control terminal) of the power amp. If
Blue 3 .
combined with an auto-antenna, connect
its blue lead to the relay control terminal of
the auto-antenna. (MAX. 300 mA, 12 V DC)
To terminal always supplied with power re-
| Orange (KEH-1250) gardiess of ignition switch position.
Red To electric terminal controlled by ignition
switch (12 V DC) ON/OFF.
ees
@ KEH-3200QR, KEH-2200QR
2-speaker system
Antenna jack
C—ID>
Black (ground)
S)
Fuse holder
Red
TG {|
Not connected to anything
for 2-speaker system.
rect tto
Green/red
Bias
Green/black
Left @ Green
oLS
© Connection cords
& wiih RCA pin piugs
4 (sold separately)
Power amp
{sold separately)
Blue , Blue
+)
Fuse holder 4
Gray/red
cc]
t
i
ft
Gray/black '
HD f
Se
Gray © Right
Jano 4
Green/black Gray/black ©
reen/biac! Y = S Am

KEH-3200GR
4-speaker system 1
\e
Antenna jack
Black (ground)
Red Fuse holder
® Green/red
cro LS
4-speaker system 2
Antenna jack
iy
Black (ground)
Sp
Red Fuse holder
=ape
~~ me ee
No connection § Green/red
in this type of C=
system. 7 Green/black
een
Left Bn ne ee
Front @ Green
|]
© Green/black | Gray/black ©
J Ps
ia
© or =
CT] oo
© Green/black | | Gray/black ©
Cc] =
@
¥ Connection cords
White § with RCA pin plugs
= t (sold separately)
ath
Red !
i
Power amp
; (sold separately)
i
Blue y Blue
!
Fuse holder ,
Gray/red @
@ KEH-32500R, KEH-22500R
2-speaker system
Ftd!
1 White
! eth
<qrih
Red
Antenna jack
Cn No connection in this
type of system.
Black (ground) (These leads are included
= with the KEH-32500R.)
Red Fuse holder Blue
om pe [| oe —]
Not connected to anything Fuse holder
for 2-speaker system.
ro pero a
Connection cords
with RCA pin plugs
White (sold separately)
Power.amp
(sold separately)
Blue Blue
cre) ES
Fuse holder
tween,
Gray/red ,
oe
Gray/black #
an 1
Gray © Front
1 Green/red Gray/red :
1 © Red
: Green/biack Gray/black !
—— pb '
he —_— oe mo ~~ om me me
@ Green
co (2
Green/black |
9
J
rere
' White
1 atttih
ag-ih
Red
Antenna jack
CTD
No
connection
in
this
type of system.
Black
(ground)
(These
leads
are
included
4)
=
with
the
KEH-32500R.)
Red
Rlue
a
pe
{|
obo
c]
Fuse
holder
Fuse
holder
Left
Right
Front
®
Green
Gray
@
Front
© Green/black Gray/black O
Cc ) oS a [To
Green/red Gray/red
@ @_
oO oq
Green/black | | Gray/black ©
LJ
98
]

4-speaker system 2 (Using separately available
amp.) (KEH-32500R)
Connection cords
with RCA pin plugs
White (sold separately)
atin
Red
(sold separately) |
Antenna jack as ee : is
CD
Black (ground) Blue Blue
On Tfr3-—<] =
Red Fuse holder Fuse holder
7 {|
te _-— a oo
No connection ' Green/red Gray/red 5
in this type of Lo ae
system. " Green/black Gray/black 4
-——-— = = = Right
@ KEH-1250
4-speaker system
Antenna jack
Black (ground) Oo
range
® Green/red Gray/red © Rear
ro Oo 5
o> LS C]
© Green/black | Gray/black ©
cc] =
Black (ground)
2-speaker system
Antenna jack
Orange
Not connected to anything Fuse holder
for 2-speaker system.
—<—
Gray/red
Cc]
Green/red
- —

5. DISASSEMBLY
@ Removing the Case
1. Insert and turn a screwdriver to remove the case.
2. Raise the case to remove.
Case
Fig. 1
@ Removing the Handle
1. Remove the two screws, and then remove the handle.
Fig. 2
10
@ Removing the Grille Assy
1. Remove the two knobs.
2. Press the tabs at four locations, and then pull out the
grille assy.
Fig. 3
®@ Removing the Cassette Mechanism Assy
1. Remove the insulator
2. Disconnect the connector.
3. Remove the six screws A and two screws B.
4. Remove the cassette mechanism assy.
A c t
2 pa or
Ge Se
a> e aA
S , SoD ~~ Onl insulator
( Be
@-A
Fig. 4

KEH-3200GR
® Removing the Dolby NR P. C. Board @ Removing the Tuner Amp Unit (KEH-1250/ES)
(KEH-32000R, KEH-3250QR) 1. Remove the screw C and for screws D.
1, Pull out the Dolby NR P. C. Board. 2. Raise up on tuner amp unit to remove it from the chassis
unit.
DOLBY NR
~ P.C. BOARD
a
y
FAX
iN
=)
RR \
LEe72_
[}
ay
o),
Tuner Amp Unit
Fig. 5 Fig. 7
© Removing the Tuner Amp Unit
(KEH-3200QR, KEH-3250QR, KEH-2200QR, KEH-2250QR)
1. Remove the four screws C.
2. Raise up on tuner amp unit to remove it from the chassis ‘
unit.
Tuner Amp Unit
Fig. 6
11

KEH-32000QR
6. ADJUSTMENT
@ Connection Diagram
NOTICE:
Select C1 so that total capacity of 80pF is attained from the
direction of the receiver jack.
Z: Output impedance of SSG.
Dummy Antenna
Antenna Jack
500 7.5m) | a Antenna Piug
= (SP
meee
‘anny Antenna
ereo
Modacror fod FM SSG
Antenne Plug
.8v
DC Regulated
Power Supply
mV Meter
(1)
DOLBY NR P.C. BOARD
VR302C4 36304
VR301 +,
mV Meter
(2)
12
SPF 4
+ pet [Sh
AM SSG 1 800-2 cit OF
sce gy [ saa
= Leh py
ry Q
o>" PE SET RATS
H of]
1 Reh
Sete
!
i)
’
ich
vR301VR302
DOLBY
NR
L ecb P, C, BOARD
S
Rae eg
FM FRONT END
4a SECTION
|_| center meter
T203 T206
(} 72°
T204
=
R56
51
aso3
4 COLLECTOR
TUNER AMP P.C. BOARD
Fig. 8

KEH-32000R
7. BLOCK DIAGRAM
@ KEH-3200QR/UC
T205 CF201
Q202 T203
RF AMP | RF AGC
FM LEVEL
ADJ
1c 4
LA1883M
Leh AF OUT
FRONT
Leh +
VOLUME P.C.BOARD cI_]
BASS TREBLE MUTE [ "7" "TTT Toon oeernr=
Q455 |
REAR
Leh +
Ic951
PD4275
7
=
LAMP +8
a503 as502
LOUDNESS
—-
SWITCH
KEY BOARD UNIT
KEY
MATRIX
Rout
OU
TAPE +B
ags2
CASSETTE MECHANISM ASSY REGULATOR
FWD
Leh HEAD
FWD/REV
SWITCH
aso C iy B. REM
REGULATOR
WTA O-—— ACC
6 8 {7
6 87
r{. TT]
Ic301
CXATIO2P
YY NR
DOLBY 5 pete
NR AMP
Q301
SOLENOID
0 DRIVER
1
Lies}
SOLENOID
O
MOTOR (M)
METAL SWITCHING
DOLBY NR P.C.BOARD
Fig. 9
15
26

DOLBY NR ADJUSTMENT
(KEH-38200QR/UC, KEH-8250QR/ES)
Cassette Tape Adjusting Point
Adjustment Method
(Switch Position)
1 NCT-150 (400Hz, 200nwb/m) VR301 (Loch) VR302(Rch) | mV Meter (2) :-6dBs+ 1dB
(DOLBY NR Switch:0FF)
FM ADJUSTMENT *X 1 Stereo MOD.: Pilot=10%
%* 2Stereo MOD.: 1kHz, L+R=90% , Pilot=10%
FM SSG(400Hz, 100%) Displayed | Adjusting Adjustment Method
Frequency | Point (Switch Position)
Frequency (MHz) | Level (dBf) (MHz)
108. wie! De V Meter: 7. OV
L2, L4 mV Meter (1) ‘Maximum
mV Meter (1) :Maximum
ie Center Meter:0
VR151 mV Meter (1) ‘Minimum
(MPX Filter :OFF)
VR152 mV Meter (1) :Separation
5dB
KEH-S200GR
AM ADJUSTMENT
Displayed | Adjusting Adjustment. Method
AM SSG(400Hz, 30% )
No. Frequency | Point (Switch Position)
Frequency (kHz) | Level (dB uz V)
Tun- T210 DC V Meter: 1. OV
ing
Volt
Tra- 7203, 204, | mV Meter (1) ‘Maximum
205, 206
ng
AM ADJUSTMENT ~ ES model when tuning step at 9kHz.
CKEH-8250QR/ES, KEH-2250QR/ES, KEH-1250/ES)
Adjustment Method
(Switch Position)
Displayed | Adjusting
AM SSG(400Hz, 30% )
Frequency | Point
Frequency (kHz) | Level (dB V) (kHz)
Tun- T210 DC V Meter: 1. OV
ing
Volt
Tra- 7203, 204, | mV Meter (1) :Maximum
cki- 205, 206
ng
14

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any
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sol @

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49076 HOWS OL
Lingua
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dZ01LLYXO
AndN! = 4N LMdiNO GND 99A indiNo 4N — IndNi
> WOLYINSSY <a
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qOO00ceE-HaA>

NJM2068D
vcc BOUT B-iIN 8 +iN
MUTE
SwitcH
A OUT A-IN A+IN VEE
!C’s marked by * are MOS type.
Be careful in handling them because they are very
*PD4275
liable
to
be
damaged
by
electrostatic
induction.
NR 64 (esen)
MTL
COM2
coM1
LCD8/KSB
to. un: oe LCD1/KS1
www
a a LCD2/KS2
wow
338 LCD3/KS3
ded
193
@ Pin Function (PD4275)
Pin Pin 1/Q]} Output Function and Operation
No, Name Format
ime [noe a ieee!
2|EO1 Quiput}C (3) ]PLL error output pins
3{EO2
4;VDD1 Device power supply pin
8|/VDD2
| sfvcon [ime | fam local oscillator signal input pin
| 6fvcon fim | frm local oscillator signal input pin
TICE Input Chip enable input pin ;
| ofrmam foto] o | FM/AM band select pin ”H"® :FM *L" :AM
| tofuw fast] oc _| Loop filter switching output pin "H" :LW
| iifmuTe foam] c fMute output pin ”*H" :ON
| 12foK [wn | | sx Signal input pin
| i3/sK fr [ [DK signal input pin
Pee.
eh)
Stereo
broadcast
detection
signal
input
pin
"L™ :Stereo
indicator
is
displayed
| is|tare [wn [ Tape power ON/OFF fnput pin *H* :ON
| 1efamir ime | | aM IF signal input pin
|
iz{sp
[ime
|
FM
SD
input
“H"
:During
broadcast
reception
| ielF/REV [ime] [Tape motion signal input pin "H" :Forward
|
19;touD
[ime]
Loudness
ON/OFF
signal
input
pin
”L”
:ON
20}NR | otat Dolby NR ON/OFF output pin ”H”" :ON
22/MSOUT [otat
23/seex — [otat
tee
25] xX! Input
z0| eno
28}/LO0G1 Gut put
29) DKOUT Out put
cfre
Tape METAL ON/OFF output pin ”L” :ON
Tape MS ON/OFF output pin "LL" :ON
"H” level: SEEK, BSM, BSA and PSCAN
Quartz oscillator terminal
GND termina]
Alarm output pin
Output
ny) ~
Halt sensitivity switching pin
"L* ;DX SEEK(P, SCAN) ” H” :LOCG SEEK.
Control by DK(terminal #12) input signal!
"H" :DK input signal is detected as 125Hz
ie

_
20
ee Pees Out put Baath signa! output pins to LOD
55 Lane
59|/K3 Input ieeciontassonciel tase matrix return input pins
| |
62/KO
a Pin 1/O]| output [i Serceareenes and Operation
Name Format
yal Output Key matrix strobe output pins
ss as
56] COM] Out put Common eee output pins to LCD
57 | COM2
| esjsu [ime | AM station level anarog input pin
Peane | [oe [rove SOC~—C—SCSCS
c (3) C~MOS (3 State)
CWW1116
b
=)
a
<
oO
4
©
vec [= |
acc IN [or |
eno [o |
AGC OUT
OUTPUT
21
~ @ LCD(CAW1162)
SEGMENT
KEH-3200QR
coma

|
2
|
3
|
4
|
5
|
6
|
7
8.
CONNECTION
DIAGRAM
(KEH-3200QR)
TUNER
AMP
P.C.BOARD
.
LSS
SSE
SSS
1
ats
Ql
Q202
Q201
C801
Q804
0251
__
2152
|
Q155
Qg52
a3
aQ5s02
ic2
agi2
a9
Q551
Q803
iQ
Q402
1C251_
.
+
IC951
Ici
@2
aQgsi
Q460
0451
Q452
Q503
Q456
Q455
Q522
Q453
0454
aon
Qsol
IC551
‘
ADJ
VRIS1
=
VRI52
L4
L3
T206
T205
T203
TS1 L5 L2 T204
$01: SOLENOID
P.C. BOARD (A)
casa-[JR263, R970. |
-_ «
:
:
e
ae
pho
RaBT—
B
=a
re
25 i ony :
=
fee
oem
7 Mess oS pas7
z re
FL RL FR RR 3x
ot $2
org
HEAD UNIT-EXAt163 85
C
ae
P.C. BOARD (B)
D
25
23