Yamaha KX-E100 User manual
COUNTER
RESET
MODE REC/
PAUSE
REC LEVEL DIRECTION
MIN MAX
DOLBY NR
NATURAL SOUND STEREO CASSETTE DECK KX-E100
STANDBY/ON
P.O.Box 1, Hamamatsu, Japan
SERVICE MANUAL
STEREO CASSETTE DECK
KX-E100
100687
■CONTENTS
TO SERVICE PERSONNEL .......................................... 1
SPECIFICATIONS.......................................................... 1
DIMENSIONS ................................................................. 2
INTERNAL VIEW ........................................................... 2
REAR PANELS .............................................................. 3
DISASSEMBLY PROCEDURES ............................... 4~5
ADJUSTMENT ........................................................... 6~9
DISPLAY DATA ........................................................... 10
IC DATA ................................................................. 11~12
BLOCK DIAGRAM ....................................................... 13
PRINTED CIRCUIT BOARD .................................. 14~21
SCHEMATIC DIAGRAM .............................................. 22
PARTS LIST ........................................................... 23~31
IMPORTANT NOTICE
This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users,
and have therefore not been restated.
WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expensive
components, and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any service required
should be performed by an authorized YAMAHA Retailer or the appointed service representative.
IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or recognition of any applicable
technical capabilities, or establish a principle-agent relationship of any form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA are
continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to
retrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.
WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to the
ground buss in the unit (heavy gauge black wires connect to this buss).
IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.
KX-E100
KX-E100
WALL
OUTLET EQUIPMENT
UNDER TEST
AC LEAKAGE
TESTER OR
EQUIVALENT
INSULATING
TABLE
1
■TO SERVICE PERSONNEL
Critical Components Information.
Components having special characteristics are marked
and must be replaced with parts having specifications
equal to those originally installed.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic
(where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency
(and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA-
SON WHATSOEVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose
eyes to solder/flux vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before
handling food.
■SPECIFICATIONS
Type
Auto Reverse
4-Track 2-Channel Playback/Recording
Stereo Cassette Deck
Heads
REC/PB Hard permalloy
Erase Double Gap Ferrite
Motors
Main DC servo motor
Tray Loading DC motor
Wow & Flutter
W.PEAK (EIAJ) ±0.19 %
W.RMS 0.09 %
Fast Winding Time
about 100 seconds (C-60 tape)
Frequency Response
Type I (Normal) 30 – 15,000 Hz ±3 dB
Type II (CrO2) 30 – 16,000 Hz ±3 dB
Type IV (Metal) 30 – 18,000 Hz ±3 dB
S/N Ratio (S : 3rd harmonic distortion 3 %, N : Weighted)
NR off 58 dB
Dolby B NR on 66 dB
Dolby C NR on 74 dB
Harmonic Distortion
1.0 %
Channel Separation
More than 40 dB
Crosstalk (125 Hz)
More than 55 dB
Input Sensitivity/Impedance
Line 100 mV/30 kΩ
Output Level
Line 570 mV/3.0 kΩ
Power Requirements
U, C models AC120 V, 60 Hz
R model AC110-120/220-240 V, 50/60 Hz
A model AC240 V, 50 Hz
B, G models AC230 V, 50 Hz
Power Consumption
12 W (Standby 3W)
Dimensions (W x H x D)
217 x 88 x 293 mm
(8-9/16" x 3-7/16" x 11-9/16")
Weight
3.0 kg (6 lbs 10 oz.)
Accessories
Input & Output cords (RCA type) x 2, System cord x 1
* Specifications are subject to change without notice.
U ........ U.S.A. model
C ........ Canadian model
R ........ General model
A ........ Australian model
B ........ British model
G ........ European model
KX-E100
1
2
3
4
5
217(8-9/16")
80(3-1/8")8(5/16")
88(3-7/16")
275(10-13/16") 7(1/4")
11(7/16")
Unit : mm (inch)
293(11-9/16")
2
■INTERNAL VIEW
1MAIN P.C.B. (4)
2Cassette Mechanism Unit
3MAIN P.C.B. (1)
4MAIN P.C.B. (2)
5MAIN P.C.B. (3)
■DIMENSIONS
KX-E100
3
■REAR PANELS
▼U, C models
▼R model
▼A model
▼B, G models
KX-E100
1
3
4
3
55
1
2
Cassette Mechanism
Unit
Hook
Front Panel
Hook
Top Cover
CB201CB209
4
■DISASSEMBLY PROCEDURES
Remove parts in disassembly order as numbered.
1. Removal of Top Cover
a. Remove 4 screws (1) and 4 screws (2) in Fig. 1.
b. Lift the Top Cover at the rear and move it rear-ward
slantingly.
2. Removal of Front Panel
a. Disconnect 2 connectors (CB201 and CB209) in Fig. 2.
b. Remove 2 screws (3) and 2 screws (4) in Fig. 1.
c. Detach the 2 hooks in Fig. 1 and then pull out the Front
Panel forward.
3. Removal of Cassette Mechanism Unit
a. Remove 4 screws (5) in Fig. 1.
b. Disconnect 3 connectors (CB1, CB2 and CB3) in Fig. 3.
Fig. 2
Fig. 1
KX-E100
899
Hook
Relay P.C.B.
Hook
Pinch Roller (R)
Pinch Roller (L)
Head Ass'y
66
66
77
CB3
CB2 CB1
F/R Belt
Main
Belt
Main
Motor
Hook
5
6. Removal of Pinch Roller
Detach the hook and then remove the Pinch Roller in
Fig. 4.
7. Removal of Head Ass’y
a. Remove 1 screw (8) and then remove the Relay
P.C.B. in Fig. 4.
b. Remove 2 screws (9) and then remove the Head Ass’y
in Fig. 4.
* Perform the adjustment of azimuth after installing the
Head Ass’y.
Fig. 4
4. Removal of Cassette Mechanism
a. Remove 4 screws (6) in Fig. 3.
b. Detach the hook in Fig. 3 and then pull out the Cassette
Mechanism.
5. Removal of Main Motor
Remove 2 screws (7) in Fig. 3.
Fig. 3
KX-E100
6
1. Before adjustment
●Since head magnetization, dust accumulations, etc. are
likely to introduce error in the various characteristics, it
is very important that the heads are properly
demagnetized and cleaned.
●Make adjustments of mechanical system, playback
system and recording system in that order.
●Except for azimuth adjustment, adjust in the forward
direction.
2. Instruments required
●Audio frequency oscillator
●ACVM or dual channel (ACVM)
●DCVM
●Wow/flutter meter
●Oscilloscope
●Frequency counter
●Torque meter
TW-2111A (TX911580) ...Take up/back tension (FWD)
TW-2121A (TX911570) ... Take up/back tension (RVS)
CT-160L (TX911120) ...................................... FF/REW
3. Test tape required
●MTT-111N (TX911650) .......................... Normal speed
●MTT-114N (TX911680) .................................... Azimuth
●MTT-212N (TX911660) .......................... Playback level
●MTT-256 (TX911300) ................... Playback frequency
response (Normal)
●MTT-356 (TX911310) ................... Playback frequency
response (CrO2)
●Reference tape
Type I/Normal (LH) ............... TDK AC225 (VU167200)
Type II/High (CrO2) ............... TDK AC514 (VU167300)
Type IV/METAL ..................... TDK AC713 (VU167400)
■ADJUSTMENTS
TEST MODE (Operation and Display Check)
Enter the TEST MODE by pressing the STANDBY/ON key while pressing the STOP key and FF key when the power is OFF.
NO. KEY FUNCTION ACTION
1 PLAY PLAY Playback mode without the cassette tape. In this mode, cleaning
the REC/PB head.
2 STOP STOP Stop the playback mode.
3 DIRECTION DIRECTION Change the playback direction.
4 FF DIMMER Dimmed display when pressing the FF key. (6 step)
5 REW PHOTO MODE Photograph mode.
6 DOLBY NR All display segments lit.
7 REC/PAUSE Version Display the program version and date when pressing the REC/
PAUSE key.
8 MODE Display grid and segments short/open check. (Fig. A is OK)
9 COUNTER RESET EXIT To escape the TEST MODE.
10 POWER EXIT To escape the TEST MODE and power off.
Fig. A
DISPLAY (Light the all segment) DISPLAY CHECK (Light a segment of each grid)
KX-E100
VR101 VR103
L
LL
R
RR
VR104 VR203VR204
VR201VR202
MAIN (1)
MAIN (2)
TAPE SPEED ADJ. PLAYBACK LEVEL ADJ.
RECORDING LEVEL & BIAS ADJ. RECORDING LEVEL & BIAS ADJ.
Azimuth adjustment
screw. (REVERSE)
Azimuth adjustment
screw. (FORWARD)
OK
Rec out L : ch 1
Rec out R : ch 2
DC input, X-Y (Resurge) mode
NG
Fig. B
0.2V
0.2V
7
KX-E100
8
Item to be
Adjusted
Check each
torque
Check FF, REW
take up time
Azimth
Tape Speed
Wow/ Flutter
Tape
CT-160L (FF, REW)
TW-2111A (FWD)
TW-2121A (RVS)
AC-514 (C-60)
MTT-114N
10kHz, –10dB
MTT-111N
3kHz, –10dB
MTT-111N
3kHz, –10dB
Step
1
2
3
4
5
Mode
FF REW
PLAY
FF REW
PLAY
PLAY
PLAY
Rating
FF, REW torque : within 70 ~ 150g/cm.
Take up torque : 30 ~ 70g/cm.
Back tension : 1.5 ~ 6g/cm.
80 to 120 seconds.
Playback output of L and R is
maximum and phase difference should
be minimum both directions. (Fig. B)
2980 Hz ±15 Hz
Less than 0.19% (WRMS)
Remarks
After the adjustment
make sure to apply screw
lock paint.
Perform adjustment at
the center of the test
tape, if possible.
Confirm at center of the
test tape, if possible.
Instrument
required
Torque meter
ACVM
oscilloscope
Frequency
counter
Wow/Flutter
meter
Adjustment
part
Azimuth
adjustment
screw.
(Fig. B)
VR101
MECHANICAL ADJUSTMENT
Rating
– 5 dBV ±0.3 dBV
Check that the 10kHz playback level
is within 0 ±3 dB of the 1kHz
playback level. (Fig. C)
Item to be
Adjusted
Playback
level
(315Hz)
Confirmation
of playback
frequency
response
Step
1
2
Points of
measurement
LINE OUT
LINE OUT
Mode
PLAY
PLAY
Instrument
required
ACVM
ACVM
oscilloscope
Tape
MTT-212N
315Hz,
250nwb/m
Test tape for frequency check.
3180µs + 120µs (LH) (MTT-256)
3180µs + 70µs (CrO2) (MTT-356)
Adjustment
parts
VR201 (L ch)
VR202 (R ch)
ELECTRICAL ADJUSTMENT
●Use 560 mV (250 nwb/m) for 0 dB as the standard level of the unit.
0 dB = 250 nwb/m (315 Hz) = –7 dBV (Rec out level)
<Playback section>
±4dB ±3.5dB
1k
±3dB
±3dB
3k 10kHz31525050 12.5kHz
Fig. C
● PLAYBACK FREQUENCY RESPONSE
KX-E100
±4dB ±4dB
1k
±3dB
±3dB
3k 10kHz31525050 12.5kHz
Fig. D
9
●TOTAL FREQUENCY RESPONSE ( –20 dBV)
Dolby NR OFF / B on / C on
Type I(Normal) / Type II (High) / Type IV (METAL)
Rating
Adjust for equal record and
playback levels.
(– 25 dBV ±0.3 dBV)
Adjust for equal record and
playback levels.
(– 25 dBV ±0.5 dBV)
Adjust for equal record and
playback levels. (Fig. D)
Perform record bias adjustment
of High (CrO2) tape again, if the
rating was not satisfied.
Confirm recorded level rating as
in step 1 when recorded level
rating is improper, go back to
step 1 and also carry out
adjustments in step 2 again.
Item to be
Adjusted
Recording
level
Recording
bias
(Total
frequency
response)
Confirmation
of recorded
level
Step
1
2
3
Points of
measurement
LINE OUT
LINE OUT
LINE OUT
Mode
REC
PLAY
REC
PLAY
REC
PLAY
Instrument
required
ACVM
Audio
frequency
oscillator
ACVM
Audio
frequency
oscillator
ACVM
Audio
frequency
oscillator
Measurement
conditions
Input 315 Hz Signal to
LINE IN from Audio
Frequency Oscillator.
Adjust output level of
Audio Frequency
Oscillator so that the
voltage of LINE OUT
becomes – 25 dBV.
Input 12.5 kHz Signal to
LINE IN from Audio
Frequency Oscillator.
Adjust output level of
Audio Frequency
Oscillator so that the
voltage of LINE OUT
becomes – 25 dBV.
Tape
AC-514
High
(CrO2)
AC-514
High
(CrO2)
AC-225
Normal
(LH)
AC-514
High
(CrO2)
Adjustment
parts
VR203 (L ch)
VR204 (R ch)
VR103 (L ch)
VR104 (R ch)
<Recording section>
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