Tascam 122MKIII User manual

TASCAM
TEAC Professional Division
(122MKiil)
SERVICE MANUAL
122MKI/112RMKI/112MKI
Stereo Cassette Deck
NOTES
As
regards
the
resistors
and
capacitors,
refer
to
the
circuit
RREAIVS
YUL
CHVES.
GRRE
LUSR
diagrams
and the PCB
assy
drawings
contained
in
this
manual.
BEBRUTKCKEAV
*
PC
boards
shown
viewed
from
parts
side.
LFUYbBREISRRHMRANTIET.
+ Parts marked with * require longer deliver time. 2. KENOMRILMMOSFODVET. SBOMCHCIRIK
x A\ Parts marked with this sign are safety critical components. So
They must always be replaced with identical components — 3. A MSRSRRBEMATH. BURT SCRMIs + Py
refer to the TEAC Parts List and ensure exact replacement. FIEOMMEEBLT< EA.
*
Parts
not
shown
in
the
parts
lists,
or
parts,
though
listed,
having
4.
UZbKANTWRVBRILRAELCH-EAZHKBMAECLT
no parts
numbers, are
not
general
“ready-to-supply*
parts.
RRs Tuk
tA.
INSTRUCTIONS FOR SERVICE PERSONNEL
BEFORE RETURNING APPLIANCE TO THE CUSTOMER, MAKE LEAKAGE- CURRENT
OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE
ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT.
Effective
:
AUGUST,
1993
4A0735
5704066611

T22MKI/TIZRMKU/112MKI |
1. SPECIFICATIONS
Tape : Compact cassette C-30 to C-90
(Normal/Cr02/ Metal)
Track Format : 4- track, 2- channel
Head Configuration
122MKM =: ~«4-track, 2-channel
Record (x1) /repro (xl) combination
head (amorphous)
Half track
Erase head (x1) (ferrite)
: 4-track, 2-channel
Record (x1) /repro (xl) combination
rotary head (permalloy)
Half track
Erase head (x1) (ferrite)
: 4-track, 2- channel
Record/repro head (x1) (permalloy)
Half track
Erase head (x1) (ferrite)
112RMK 0
112MK I
Motor
122MK I =: FG servo direct-drive capstan motor x1
DC servo reel motor xl
DC ancillary motor xl
112RMK 0/112MK I: DC servo capstan motor x1
DC reel motor xl
DC ancillary motor xi
Tape Speed : 4.8 cm/sec.(1-7/8")
Pitch Control : +/-12 % (approx.)
Line Input
-Rear RCA jack/front 1/4" jack
Nominal input Level: -10 dBV (0.3 V)
Minimum Input Level: -18 dBV (126 mV)
Input Impedance: 20k ohms, unbalanced
-XLR-type jack (standard on 122MK I ; optional on
112RMK 0. /112MK I ~ LA-112 required)
Nominal Input Level: +4 dBm (1.23 V)
Input Impedance: 10k ohms, balanced
Line Output
-RCA jack (rear)
Nominal Output Level: -10 dBV (0.3 V)
Maximum Output Level: -2 dBV (0.8 V)
Output Impedance: 100 ohms
Load Impedance: 25k ohms or more
-XLR~type jack (standard on 122MKII ; optional on
112RMK 11/112MK I —- LA-112 required)
Nominal Output Level: +4 dBm (1.23 V)
Minimum Load Impedance: 600 ohms
Headphone Output: 100 mW (8-ohm load)
Bias/Erase Frequency :
122MK I1/112RMK I : 150 kHz
112MK 0: 100 kHz
{Lt
Equalization : 3180 7s+70 us (CrO2/Metal)
3180 7 s+120 us (Normal)
Reference Recording Level :
250 nWb/m=0 VU (315 Hz) (EIAJ) ;x
with Dolby: 200 nWb/m=-1. VU
Remote Connector: 25-pin D-sub
Power Requirements :
USA/Canada: 120 V AC, 60 Hz
U.K./ Australia: 240 V AC, 50 Hz
Europe: 230 V AC, 50 Hz
Japan: 100 V AC, 50-60 Hz
Consumption :
122MK 11/112RMK I: 23 W
112MK I: 20 W
Dimensions (WxHxL) : 482 mm x 132 mm (rubber feet
not included) x 356.3 mm (19"x 5-3/16" x 14”)
Weight :
122MK I1/112MK 1: 8.4 kg (18-8/16 Ibs.)
112RMK I: 8.7 kg (19-3/16 Ibs.)
Typical Performance
Speed Accuracy :
122MK I: +/-0.5 %
112RMK 01/112MK I : +/-1.0 %
Wow & Flutter 1): less than 0.04 % WRMS
Fast Winding Time: 70 sec.(approx.) with C-60
Frequency Response, Overall 2) (EIAJ, without NR)
122MK Mf: 25 Hz to 20 kHz,+/-3 dB (Metal)
25 Hz to 19 kHz, +/-3 dB (CrO2)
25 Hz to 17 kHz, +/-3 dB (Normal)
: 25 Hz to 19 kHz, +/-3 dB (Metal)
25 Hz8to 18 kHz, +/-3 dB (Cr02)
25 Hz to 17 kHz, +/-3 db (Normal)
: 25 Hz to 19 kHz, +/-3 dB (Metal)
25 Hz to 18 kHz, +/-3 dB (CrO2)
25 Hz to 16 kHz, +/-3 dB (Normal)
Distortion 2) : less than 1.0 %, at 1 kHz, 160 nWb/m (Metal)
S/N Ratio 2) (metal tape)
122MK I[/112RMK I: 60 dB (without NR, ref. 3 %
THD, WTD)
: 59 dB (without NR, ref. 3 % THD, WTD)
68 dB (with Dolby-B NR, over 5 kHz)
78 dB (with Dolby-C NR, over 1 kHz)
Channel Separation 2): 45 dB or better (1 kHz)
Erase Ratlo 2): 65 dB or better (1 kHz)
112RMK I
112MK I
112MK I

In
these
specifications,
0
dBV
is
referenced
to
1
Volt,
and
O
dBm
is
referenced
to
0.775
Volt.
Actual
voltage
levels
are
shown
in
parenthesis.
1)
Measurements
made
with
TEAC
test
tape
MTT-111
2)
Measurements
made
with
TEAC
blank
test
tape
MTT-
5571
(Metal),
MTT-5562
(CrO2)
and
MTT-5512
(Normal).
‘
Dolby
noise
reduction
and
HX
PRO
headroom
extension
manufactured
under
license
from
Dolby
Laboratories
Licensing
Corporation.
HX
PRO
originated
by
Band
and
Olufsen.
"DOLBY",
the
double-D
symbol
"00"
and
"HX
PRO"
are
trademarks
of
Dolby
Laboratories
Licensing
Corporation.
:
MiChanges
in
specifications
and
features
may
be
made
without
notice
or
obligation.
| 122MKIl/112RMKI/112MKII
@
<
OBIS,
OdBV=1V,
0dBm
=
0.775V
CRRLTOEFS
SROBLL () CRLTOES,
Bl) cOBoOeHI. FAh-F-S TEAC MTT-1ILIZE
HET.
2)
LOMO,
FSU
7
-F-7
TEAC
MTT-5571
(METAL),
MTT-5562
(CrO2),
MTT-5512
(NORMAL)
KkOET.
MRE
LUANG,
PEEK
EBT
SBSH
DET,
*
FVE-*/A
RUFF
yY
ayvRUEXFoeAy
FV-bt
DAF
VY
ard
KFVE-SRShY-KS4evy
ya
-RL-YarPoORPMECERIsMAnTWVET,
HX
TONY
ITY
FANI“GYOSREYT,
*
(KVE-],
(00)
RU
CAX
Fo]
EV
E-SH#ShY
-RIFRYY
YF
A-RV-Y
3
LORSRETCT,
llustration
shows
122MK
Ill.
The
measurements
of
the
three
models
are
the
same.
FFAS
IZZ2MKMOSOTH.
112RMK
il,
112MK
1
SHEETS.

122MKI/112RMKIL/112MKI |
2. MECHANICAL CHECKS AND ADJUSTMENTS
PETS EE OTE tS
2-1. Pinch Roller Pressure
(122MK 11,112RMK Il,112MK Il,)
. Attach a spring scale to the pinch arm.
. Push up the cassette switch (transport protection lever),
then while holding the cassette switch up, press the
PLAY button to engage the pinch roller and capstan
shaft.
3. Pull the spring scale in direction indicated in Fig. 2-1
until the pinch roller fully loses contact with the
capstan shaft; then slowly ease the scale so the pinch
roller moves back toward the capstan shaft.
4. Note the reading on the spring scale the moment the
pinch roller again starts rotating. The scale should read
380 to 480 g.
* Check both in FWD/PLAY (right pinch roller) and
in REV/PLAY (left pinch roller) for 112RMK I.
we
2-1. Evy ¥0-sEBH
(122MK IIl,112RMK 11 ,112MK II)
LOY F + T-BAR.
Zmey bh tye RA VFO F-LELAIHHL, PLAY #9
VERALT. FU4+E-KIGTS MER. AL VFO T-
ALA IHLEHITS TL.
BEYF sao -SRe ye ARGV Ye DT hPOoORecensk
SICPBERPOAM (H2-1) 5s, Cv FF -0-F
RHUF ye TAI Ys ve 7 RCERTSEIICRLICRT.
4.CYF > 0-SREYBHSZLEDBERL,
* 112RMK Hit, FWD/PLAY (4b yF+a-5), REV
PLAY (EUY#F+u-F) HBTS,
HHS : 380~480 g
Fig. 2-1
2-2-A. Tape Positioning (122MK Ill)
Adjustment Tools :
* Head adjustment jig ”"A” : Part No. 5736006600
* Head adjustment jig "B” : Part No. 5736006700
«Erase head spacer ; 0.05mm : Part No. 5801357800
O.lmm_ =: Part No. 5800556200
0.2mm _ : Part No. 5801197800
jig B R/P head
Fig. 2-2
2-2-A. F— FHF (122MK Ill)
mBiGR
“Ny FRIES A : dh 5736006600
“Ny FSR B : ae 5736006700
“HEN y Fe AN-—+0.05mm : dB 5801357800
0.lmm_: sa@ 5800556200
0.2mm : gaa 5801197800
jig B R/P head
Fig. 2-3

1. Adjusting the erase head height
1). Set jig A as shown in Fig. 2-2, then set the deck
to PLAY mode.
2). Confirm that jig B smoothly fits into the tape guide
groove on the erase head.
If it doesn’t, add or remove the spacer(s) between
the erase head and head base.
2. Adjusting the R/P head height
8). As with the erase head, confirm using jig B; for
adjustment, use height adjustment screw A (Fig. 2-4).
3. Adjusting the R/P head tilt
4), As shown in Fig. 2-3, place jig B against the head
in order to confirm the tilt. Perform tilt adjustment
with screw B (Fig. 2-4) so that the head is at right
angles with respect to jig B.
5). If tilt adjustment screw B is adjusted, revert to 3),
then confirm again.
4, Adjusting R/P head azimuth
6). As shown in Fig. 2-5, hook up the measuring
instruments.
7). Play back the 10 kHz signal on test tape MTT-256,
then adjust playback azimuth adjustment screw C
(Fig. 2-4) so that the phase difference between L
and R channels is 0° .
8). If azimuth adjustment screw C is turned more 45° ,
revert to 3), then reconfirm.
5. Confirming the tape travel
9). When mirror tape MTT-902 is run in PLAY mode,
see that the tape is free from curl at each guide
portion.
10). If the tape is curled, fine-adjust the R/P head
height using screw A [or adjust the erase head
height using spacer(s)] then revert to 6) and
reconfirm.
REC head REPRO head
REC azimuth
adj. screw screw A
screw B
Fig. 2-4
| 122MKI/112RMKI/112Mk1
LARA y FORSHEE
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AN-PEBMERIRETSCERLOABTS.
2. R/PN\y FOR SRS
3). BEA» FERRIS RB CHL, BRUBSBBRTA
(BI2-4) i kYAS5.
3. R/PX» FOF bE
4). M2-3D04 5RGBBENY FICMSCTCF VE SHBL A
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(RI2-4) CHT.
5). FUbRBAY BEBE LEBER. 3) AiR tHe
_ $SHRRRTS.
4. R/PA»y KOT YT ARS
6). M2-5 O45 CHEB 3.
7). FAh*F-PMTT-2560 10kH2 4B LT, Lohé Reh
ORBEA 0° MAL ICRET YL TAREAIC (M2
-4) CHET.
8). FY VARBALY Ce 45° DEBRA KBSIA. 3) Hic
RO tHURERERRT 4.
5. 7 -FET ORR
9). PLAYS- FCI 5—+-F-PMTIT-92e#F aE
%. BAT FRCF-PSOA-NARMOCLEHBY SZ,
10). A-V L TW SBS, R/PN» FORSEAY ACHE
% (EkMAKNy FORSEAN-VCHE) UR
6) BicROtNHOBEREHERT SZ.
Oscilloscope
DECK
under test
OUTPUT
O°finphase) 45° = 90° —- 135°. 180 “(out of phase)
(LB) (sot)
Fig. 2-5
|
|

12Z2MK/TIZRMKU/TI2ZMKI
|
2-2-B. Tape Positioning (112RMK Il)
Adjustment Tools :
«Head adjustment jig "A” : Part No. 5736006600
«Head adjustment jig "B” : Part No. 5736006700
*R/P head spacer ;0.05mm : Part No. 5801357700
0.lmm_: Part No. 5800595000
0.2mm =: Part No. 5800595100
Fig. 2-6
1. Adjusting the erase head height
1). Set jig A as shown in Fig. 2-6, then set the deck
to FWD/PLAY mode.
2). Confirm that jig B smoothly fits into the tape guide
groove on the FWD erase head.
If it doesn’t, adjust Allen nut A shown in Fig. 2-6.
3). Set the deck to REV/PLAY mode, and in a similar
way, adjust the REV erase head using Allen nut B.
4). After adjustment is complete, repeat FWD/PLAY,
and REV/PLAY for reconfirmation.
2. Adjusting the R/P head height
5). As in the confirmation of the erase head height,
confirm the R/P head height in FWD/PLAY and
REV/PLAY modes using jig B.
*If the head is both high (or low) in FWD and
REV modes, replace the spacer under screws C and
D (Fig. 2-6) with a thin (or thick) one. (Add
or remove the same number of spacers with the
same thickness for both screws C and D.)
«If jig B smoothly fits into the guide groove in
both FWD and REV modes, or the height is
opposite (example: high in FWD mode and low
in REW mode), it should be deemed acceptable.
2-2-B. F-FHTT (112RMK II)
mtiaR
*\y FBR A : Ga 5736006600
“Ny FHSS B : da 5736006700
°R/PAy Fs AN-—F 0.05mm : doe 5801357700
0.lmm_: gaa 5800595000
0.2mm _: gaa 5800595100
jig A
REV erase head
screw F
1 Hey FORSHEE
1). 2-69 £54 RAStY BLL FWD/PLAY€- Fiz
To
2). BEBAFWDABEA »y FOF -— 7-H PRI AA-K
CASZCEXHBRTS.
ZH CHOBE, M2-6OnBty hAFBET3Z.
3). REV/PLAY €~ FICUT, BRI REV RIBE » FOR
SeKht» bBCABTAZ.
4). S49. FWD/PLAY, REV/PLAY £0358 L CHEER
tZo
2. R/P\y FORSRS
5). BHkN»y FORSHBe Hic. FWD/PLAY, REV/
PLAYS— KI<BU4R/PAy KORSetKREBCHEBT
bo
+ FWD, REV CA » FORSPHECBY BS.
RIC, D (2-6) DFOAN-4-FRBOMWO Bw)
HOKRAS. (C, DEMUCESOAZN-+F —- SAMARAS
BISz2&) ,
* FWD, REV, EBSA FRI AL-XKASEBE
ALFWD, REV CeqSoet (i): FWD, REWER
Eu) OBS OK LETS,

3. Adjusting the R/P head azimuth
6). Hook up the measuring instruments as shown in
Fig. 2-5.
7). Play back the 10 kHz signal on test tape MTT-256
in FWD/PLAY mode, then adjust FWD azimuth
adjustment screw E (Fig. 2-6) so that the phase
difference between the L and R channels is 0° .
8). Likewise, adjust REV azimuth adjustment screw F
so that the phase difference in REV/PLAY mode
is O°.
9). If azimuth adjustment screw E or F is turned more
than 45° , revert to 5), then reconfirm.
10). When mirror tape MTT-902 is mm in FWD/PLAY
and REV/PLAY modes, see that the tape is free
from curl at each guide portion. At the same time,
see that the tape comes into contact with the lower
guide of the R/P head during FWD mode and that
the tape comes into contact with the upper guide
of the R/P head during REV mode.
11). If the tape is not traveling as described above, fine
-adjust Allen nuts A and B on the erase head, then
revert to 6) and reconfirm.
2-2-C. Tape Positioning (112MK Il)
Adjustment Tools :
* Head adjustment jig "A” : Part No. 5736006600
¢ Head adjustment jig "B” : Part No. 5736006700
° Erase head spacer ; 0.05mm : Part No. 5801357800
0.lmm :Part No. 5800556200
0.2mm _ : Part No. 5801197800
*R/P head spacer; 0.05mm : Part No. 5801357700
O.lmm =: Part No. 5800595000
0.2mm =: Part No. 5800595100
1. Adjusting the erase head height
1). Set jig A as shown in Fig. 2-7, then set the deck
to PLAY mode.
2). Confirm that jig B smoothly fits into the tape guide
groove on the erase head.
If it doesn’t, add or remove the spacer (s) between
the. erase head and head base.
2. Adjusting the R/P head height
3). As with the erase head, confirm using jig B, and
make adjustment using spacer(s).
3. Adjusting the R/P head azimuth
4). As shown in Fig. 2-5, hook up the measuring
instruments.
5). Play back the 10 kHz signal on test tape MTT-256,
then adjust the azimuth adjustment screw (Fig. 2-7)
so that the phase difference between the L and R
channels is 0° .
6). If the azimuth adjustment screw is turned more than
45° , revert to 3), then reconfirm.
| 122MKI/112RMKI/112MKI
3. R/PN\y FOV Y 7 ARS
6). M2-5O 45 MERLE SZ.
7). FWD/PLAY €—- FGF AheF—-—F MTT-256@ 10kHz
=REULT, Leh ¢ Rch OfBEA 0° KH ZKIIZFWD
FAY YT ARBARLE (2-6) STS.
8). eZ, REV/PLAY © — FECHA 0° KAZ KSI
REVA7 YVAMSBAY FERS 4S,
9). FYTARBRAVESKILZFH45° CEB AtrewBeald.
5) HACK tnNOUBAREHeRS 3.
4.7 -THPFORR
10). FWD/PLAY, REV/PLAY€- F@i53-—°F-7 MTT
~W2SEASHKLE, BAL FRCT-TOA-— WAH
WItSHRTS, Ek. FWDRK, R/PA» FO FOR
4 Fic, REVER R/PN\»y FOLOW4 Fic F—-TOY4re
SLELHRTS.
11). EIDE GIF —- TREAT LTO UOBSI, BEN Y F
OAT» bA, BCRAB LEAK, 6) HicRo tne
EBERT SZ.
2-2-C. F-FH#T (112MK 1)
mesieR
*”\y FSSA : ax 5736006600
*\y FRSEB : GB 5736006700
“BEN y Fe AN-+F 0.05mm : de 5801357800
O.lmm : gaat 5800556200
0.2mm _ : gud 5801197800
°R/PN»y Fe AN—¥F 0.05mm_ : ge 5801357700
O.lmm : gu 5800595000
0.2mm : and 5800595100
lL HeAy FORSRS -
1). M2-7TOLFCHBASLY LY PLAYE— Feo 4,
2). BEBAWEA vy FOF -T°HT FRICZL—-KEASZC
ces 4.
EATIWOBS, FEN FeNy Fe ACIS
AN-FREBMERLRATS CER LORBKTS.
2. R/P\ y FORASBS
3). Bk y FERRIC SBCHBL. BRDMEN: ECR
RI AN-+CHT35.
R/P head
azimuth adj.
jig B screw
erase Feead
Fig. 2-7

122MKI/11Z2RMKU/112MKIl |
4. Confirming the tape travel
7). When mirror tape MTT-902 is run in PLAY mode,
see that the tape is free from curl at each guide
portion.
8). If the tape is curled, adjust the erase head height
using spacer(s), then revert to 4) and reconfirm.
2-3. Reel torque (122MK Ill, 112RMK Il, 112MK II)
1. Take-up torque/back tension
1). Set up the cassette torque meter (MTT-8111), then
set the deck to PLAY mode (FWD/PLAY mode in
the case of the 112RMK I) and read the value on
the torque meter.(If the reading has a deflection
{the pointer swings], use the center value.) The
standard range is as follows:
2). Likewise, put the cassette torque meter (MTT-8121)
to the 112RMK I, then set the deck to REV/PLAY
mode and read the value on the torque meter.
Take-up torque: 25 to 65 g*cm
Back tension: 122MK I, 112RMK 0; 6 to 10 gecm
112MK If; 2 to 6 g*cm
2. F.FWD/REW torque
Set up the cassette torque meter (MTT-8242), then
measure the starting torques in F.FWD and REW
operations, respectively.
F.FWD/REW torque: 80 g*cm or more
2-4. Tape speed (122MK Ill, 112RMK Il, 112MK It)
a
. As shown in Fig. 2-8, connect the frequency counter.
. Load the test tape MTT-111N.
3. Let the capstan motor rotate in PLAY mode, then leave
it as it is for at least one minute to warm it up.
4. Set the PITCH CONT switch to OFF.
5. Play back the middle section of the test tape, then
adjust trimmer resistor Rl (Fig. 2-9) on the P.CONT
PCB so that the frequency counter reads 3000+5 Hz.
6. Set the PITCH CONT switch to ON, then set the PITCH
CONT knob to the center.
7. Play back the middle section of the test tape, then
adjust trimmer resistor R2 (Fig. 2-9) on the P.CONT
PCB so that the frequency counter reads 3000+5 Hz.
8. Upon completion of adjustment, confirm that the following
value is obtained at the beginning and end of the tape.
iS)
Speed variations: 3000+ 45 Hz
Fluctuation range: within 30 Hz
3. R/PNy FOV YTV ARSE
4). M2-5DO £5 CMEREERT S.
5). FAheF-—T MTT-256 0 10kHz4# B+ UT, Leche Rch
OMIM 0° LEAZKIKIYPTARBRY (M2-7) S
wT BS.
6). TYVARBALS 45° OEMS eels, 3) Bice
DtNUEEREERT 3.
4.7 - THETFORD
7). PLAYE— FCI F—--F-F MTT-M2e#TStKE
%. BAT FRCF-FOA-NARMOCLESRATS.
8). A-VLTWSHSIZ, HEN y FOMSEAXN-Y CHE
Lik, 4) RcR0tnNUKREHEHRT AS,
2-3. U-Ibs hIVD
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LFIAFT YT Oh RDF YY ary
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9 OIE 0
FAITFTIS* bNMZ :25~65 ge-cm
NyIFvY say :122MKI, 112RMKI ;6~10 g-cm
112MK I; 2~ 6 g*cm
2. F.FWD/REW hibZ
Atty he bFZ-X-H (MTT-8242) SHIAL. FFWDH
TEE LU REW SEO b V7 EENSCHHET So
F.FWD/REW ha7 :80 g>cmuk
2-4. 7 -TRE
(122MK IIl,112RMK 11,112MK I)
1, B2-8D4 512, ARRAY Y SERS S.
2.7 Ab + F-7T MIT-lLIINERSS SQ
3. PLAYE-—FC++7APY-S-F EBS. VA- lv
TI VTFSERBIZ, DIK EHIFMTOFEKLTS< ©
4. PITCH CONT A4 » FE OFFS.
5. FA bh SF -TOPMREBE L, ARRAY YY fA 3000
£5 Hzit%Sk5tc P.CONT PCBOWBICIE R1 (2-9)
ZBETS.
6. PITCH CONT 24 y F#ONIZL, PITCH CONT 32 HE
Rize 7 bo S. ,
7. FA SF —TOPMMEGA L. ABBA Dv ¥ D182 3000
+5 HzicwSk5lz P.CONT PCBOMEIEIH R2 (W2-9)
2B S.

\ 9. Confirm that the frequency is 2700 Hz or less when
the PITCH CONT knob is set to minimum with the
PITCH CONT switch ON and 3300 Hz or more when
the PITCH CONT knob is set to maximum.
Frequency Counter
Wow & Flutter Meter
DECK
under test
OUTPUT
2 Fig. 2-8
2-5. Wow and flutter
(122MK Ill, 112RMK HI, 112MK #)
Note : Measurements should be made in PLAY mode at
the beginning, middle and end of the tape, respectively.
(However, avoid the first graduation on the cassette
shell for the beginning and end of the tape.)
J. As shown in Fig. 2-8, connect the wow & flutter meter
to the deck.
2. Play back the test tape MTT-111N.
3. Measure the wow- flutter value. The standard range
is as follows:
within 0.06% (WRMS)
2-6. Adjusting the quick reverse voltage
(112RMK Il)
1. Connect the DC voltmeter between TP2 (Fig. 2-10)
on the CONT S PCB and GND.
2. When blank tape MTT-5512 is played back in the REV
/PLAY mode, adjust R26 (Fig. 2-10) on the CONT S
PCB so that the voltage at TP2 reads 2.5 V.
CONT S PCB
t ES
Fig. 2-10
TEAC-00347 / DRUCK 1
| 122MkK0/112RMKI/112MKI
8. ABR. F-TSORRDLSRD OT, FacOseonser
& EHTS So
TRE Wa : 3000445 Hz
ee :30 HzLA
9, PITCH CONT A4 y FONG. PITCH CONTDESER/
LES 2Z700HZWK, MARLEE 3300HzUETHS
tte
P. CONT PCB
Fig. 2-9
2-5.99 *VIvIF
(122MK Iil,172RMK II ,112MK II)
ER : MEUBERICKLYN, F-TFORBO, PHB. SRD OD
CENENTH TCR SU. GEL, WEY bes - TOAD
teed) O1 BBY itR<)
1. B2-8DE5K, IDTV GV It 2A -PEF v FEET SZ.
2FAh+*F-PMTT-LLINABETS,
399° 75 yFEMET S. BHBIKOW).
0.06 %LLA (WRMS)
2-6.974 997° UN-ABERE (112RMK II)
1. CONT S PCBOTP2 (Mi2-10) & GND DCBHHEE
BEF So
2. REV/PLAY€~- FG, F747 *F-TF MTT-905 SB
LEE, TP2OREM 25ViITMSKIGI CONT S PCBO
R26 (Bj2-10) HET S.
3. AMPLIFIER SECTION CHECKS AND ADJUSTMENTS
FVYPRORRLBES
TAPE : MTT-256
(dB)
+3 +3
) 0
-3 -3
ee er ee
63 315 10k (Hz)
Fig. 3-1 Playback frequency
BE AiR
(4B)
+1 +1
a aaa
-3 -3
(a ee
20 400 20k (Hz)
Fig. 3-2 Monitor frequency response
E=Y — ARSE
—— DOLBY NA: IN
»«- DOLBY NR: OUT
63 400 12.5k 14k vee (Hz)
T12MK 11 | 122K ill
112RMK It
Fig. 3-3 Overall frequency response
SARS
10

122MKI/112RMKI/112MKI |
MAIN PCB
L102 L202
TP1 O O TP2
Ri61 R261
METER AMP PCB
Ri2~ = R11
Fig. 3-4 Adjustment and test point locations
BRETARKIY MEM
11
TEAC-00347 / DRUCK 2
R122
Day
L101 (KZ) L201
SAMY
O
R117
R222
®)
R217
Oscilloscope
Speaker
Amplifier
Fig. 3-6
Oscillator Oscilloscope
Distorion Analyzer
Amplifier | Speaker
Attenuator
DECK
under test

| 122MKI/112RMKI/112MKi
Oscillator
AC voltmeter
Attenuator DECK
under test
TEST LOAD RESISTORS
Fig. 3-8
Frequency Counter
Oscillator
Oscilloscope
O°(inphase) 45° 90° 135° 180°
( 4B) (i048 )
Fig. 3-10
13

12Z2MKl/ TIZAMKU/TIZMKL |
3-1. Precautions 3-1. EB
l. Before performing adjustments and checks clean and LFV TROBE - HERO. F-VTEARORE LIBRE
demagnetize the entire tape path. 2TH,
2.
Indication,
for
example,
"R122/R222"
means
that
R122
2.
R122/R222
cso
SNTOSMBi,
Loch/Rch*ERLEF.
is
for
Lch,
R222
is
for
Rch.
8.
OdBm
=
0.775V,
OdBV
=
LOV
THRU
THEFT,
3. 0 dBm is referenced to 0.775 V. 0 dBV is referenced A UNITE. ADT YE-FYR IMQUEODOEBALT
to 10 V. < PEAS
4,
The
AC
voltmeter
used
in
the
procedures
must
have
5.
FICHE
RORBA,
FA
PHY
bBELVHREMIIN
an
input
impedance
of
1
MQ
or
more.
38-4EBRMLT<K
HAWS
5. Unless otherwise specified, refer to Fig. 3-4 for location 6. FSICFEROMUEO. F-BLUAT y FHAILOFF ICL THY
of test points and adjustment points. TCKRSU,
6. Unless otherwise specified, leave all keys and switches
in the OFF position.
3-2. Playback System B45
Test Mode : PLAY
MONITOR switch : AUTO
input Signal Adjustment Point | Measurement Method / Vaiue Adjusted For
AES PR WEA - RHE
MTT — 150 R122/R222 122MK II, 112RMK I :
TPS/TP6 : — 6dBm
112MK I :
TP3/TP4 : ~ 6dBm
OUTPUT cont. | OUTPUT (RCA, Lch) : - 11dBV
frass | OUTPUT (RCA, Rch) : ~ 11dBV
After adjusting, do not move the OUTPUT cont.
(Nominal position)
Preliminary
PENG > ERE
Adjustment Item
be 9 =|
Connection (#2) : Fig. 3-5
1. Reproduce
reference level
EBL AI
Connection (#2) : Fig. 3-6
OUTPUT (RCA) :
WBE, OUTPUTSVESSMMSUVIL, HUE)
Same output level at 10 kHz and 315 hz
10kHz DHA LAIVASBISHZOWAL VER
MTT — 256 R117/R217
URES EFC
eo few ownen
3. Level Difference Same as above Same as above Check only within 3 dB
between Channels | faJ_£ cia (within the limits of reproduce frequency
F » RIVALS response) (FE AHHERISAIZ tT)
4.
Level
Fluctuation
|
Same
as
above
Same
as
above
Check
only
63
Hz~6.3
kHz,
within
2
dB
,
UNIVER falE falE 6.3 kHz~10 kHz, within 3 dB
f)
5. Reproduce S/N Same as above Check only Measure output when leader tape is played
ratio jE
FS SN EE
Connection (##2) : Fig. 3-6
2. Repro. Frequency
Response
BERRA
back with the unit set for nominal outme
level, and compare this reading with
nominal output level.
BEER. U-S- - F-TSEBELKE
BDI A K+ VAIVMIBIEWAVAVERATE
FOIE.
S/N (120 us): 46 dB or more
S/N (70 us): 48 dB or more
Deference between channels: 4 dB or les

| 122MKI/112RMKI/112MKI
3-3. Monitor System £=9—-%
Test Mode: STOP (unless otherwise specified ##I<#E7KO iE MEY )
MONITOR switch : INPUT
Measurement Method / Value Adjusted For
NEA +
Preliminary Adjustment Point
em IE
input Signal
ATHES
Adjustment Item
RAB
Pt
OUTPUT (RCA): -10 dBV
L,R
After adjusting, do not move the INPUT controls.
(Nominal position)
MBAs. INPUTOFSSIMSKOIL, GAEL)
INPUT (Rear, RCA) : OUTPUT (RCA): -10 dBV+3 cB
400 Hz/-18 dBV
Connection (#:##) : Fig. 3-7
INPUT cont. : Max.
1. Minimum input
level
BhAAL
INPUT (Rear, RCA) :
400 Hz/-10 dBV
2. Nominal input Connection (###2) : Fig. 3-7
level
BRAD LAI
Same as above VU meter indication: 0 VU
fb
Same as above
ft
3. Meter level
X-F- VAIL
4.
MPX
FILTER
Connection
(#24)
:
Fig.
3-7
|
INPUT
(Rear,
RCA):
OUTPUT
(RCA)
:
MPX
7
4
LZ
~
MPX
FILTER
sw.
:
ON
19
kHz/-10
dBV
Minimum
output
level
(Effect
:
30
dB
or
more)
BALAI SSIS HRS
30dBUED= &)
L103/L203
5.
XLR
output
level
|Connection
(#€%)
:
Fig.
3-7
{INPUT
(Rear,
XLR):
|
Check
only
OUTPUT
(XLR)
:
XLRBAL
AL
INPUT
sw.
:
BAL
400
Hz/+4
dBm
+4
dBm+1
dB
at
100
kQ
load
(122MK
Ill
only)
(+2.5
dBm+1
dB
at
600
Q
load)
6.
Front
input
Connection
(#2#%)
:
Fig.
3-7
|
INPUT
(Front,
1/4”)
:|
Check
only
OUTPUT
(RCA):
-10
dBV+2
dB
FRONT
AD
400
Hz/-10
dBV
7.
PHONES
output
Connection
(#4)
:
Fig.
3-8
|
INPUT
(Rear,
RCA):
|
Check
only
PHONES
OUT:
PHONES
cont.
:
Max.
400
Hz/-10
dBV
100
mW
or
more
(82
load)
100mWELE
(8
OFF)
level
PHONES #7) bul
OUTPUT (RCA, XLR) :
60 dB or more (DIN AUDIO)
60dBUE (DIN AUDIO)
OUTPUT (RCA, XLR) :
Specs (#148) : Fig. 3-2
8. Monitor S/N
€=9-S/N
Connection (#28) : Fig. 3-7
INPUT (Rear, RCA) :
20 ~20 kHz/-10 dB’
9. Monitor frequency | Same as above
While alternating the oscillator signal
between 10 kHz and 400 Hz by pressing
the 10 kHz sw. on and off, adjust for same
output level at TP7.
10 kHz2%4 »y FEON/OFF L.TP7 OWA
NMEAURASZESCMETS,
Connection (#62) : Fig. 3-5
10. Internal osc.
AMHR
(122MK Ill only)
With REC/PLAY mode, press
ADJUST key, then press OSC
key.
REC/PLAY3ARET.. ADJUST =
~®ONIZL. ELTOSC#-#%
ONIZS4,
Set the oscillator to 400 Hz (10 kHz sw.
off) and adjust for -28 dBV at TP7.
10 kHzA4 y FR OFFIZL. TPT OMA AUL
2 -28dBVILASZKACMBIS.

122MKI/11Z2RMKU/112MKil |
3-4. Recording System 2%
Test Mode: REC/PLAY (unless otherwise specified #I<HE7ROR\ GED )
MONITOR switch: AUTO
Input Signal
AES
Preliminary
Adjustment Item
Eb 3t-4]
1. Bias OSC
frequency
INA FT RFA
112RMK I :
Connection (4%) : Fig. 3-9
Test tape: MTT-5571
Mode : FWD REC/PAUSE
& REV REC/PAUSE
122MK II, 112MK I :
Connection. (6%) : Fig. 3-9
Test tape : MTT-5571
Mode : REC/ PAUSE
2. HX PRO coil
HX7o 34tI
Connection (##%) : Fig. 3-5
Test tape : MTT-5571
Mode : REC/ PAUSE
3. Rec azimuth,
Temporary bias
BET VTA. BN | Test tape: MTT-5512
ATR (NORMAL)
(122MK Ill only)
Connection (##) : Fig. 3-7
. Bias set-1
NAT A+ ty b-1
Test tape: MTT-5512
(NORMAL)
. Rec level- i Same as above
BEVNI-1 fejE
Connection (#28) : Fig. 3-7 | INPUT (Rear, RCA) :
400 Hz, 10 kHz/
-36 dBV
. Bias set-2
INAT Re By b-2
Test tape: MTT-5562
(Cr02)
Same as above
BE
Connection (#4) : Fig. 3-7
Test tape: MTT-5571
(METAL)
Connection (48%) : Fig. 3-7 | INPUT (Rear, RCA):
400 Hz/-14 dBV
. Ree level-2
SEVNAI-2
Test tape: Same item 6.
. Total harmonic Connection (#%) : Fig. 3-7 | Same as above Check only
distortion fk
ReES Test tape: Same item 3 and
6.
16
Adjustment Point
Boks (0
L3 (for FWD)
L207 (for REV)
L3
1102/1202
Connection (##%) : Fig. 3-10 | INPUT (Rear, RCA): | R161/R261
10 kHz/-36 dBV
INPUT (Rear, RCA): | R161/R261
400 Hz,-10 kHz/
-36 dBV
INPUT (Rear, RCA): | R302/R402
400 Hz/-14 dBV
Ril
Measurement Method / Value Adjusted For
WEAR - A
Connector P8 pind: 100+0.1 kHz
122MK II :
Connector P8 pind: 150+0.1 kHz
112MK I:
Connector P8 pind: 100+0.1 kHz
TPL/TP2: Max. DC voltage
DC GERA
OUTPUT (RCA) :
Max. output level WAVCURK
OUTPUT (RCA) :
Phase between Lch/Rch : 0°
Lech & Reh DEBATE VIZ S KD IPE
OUTPUT (RCA) :
Same output level at 400 Hz and 10 kHz.
400Hz & 10kHz DHDL AULA LIKS ED
HS
OUTPUT (RCA): -14 dBV
OUTPUT (RCA) :
Same output level at 400 Hz and 10 kiz.
400Hz ¢ 1OkHz DORAL NIA LIZAS £5
(HS
Same as above
fale
OUTPUT (RCA): -14 dBV+2 dB
OUTPUT (RCA) :
122MK II, 112RMK I: 2.0 % or less
for all tapes.
112MK 1: 2.5 % or less for all tape
BF-TFC2ZO“UF (112MK Tid. 25%
F

122MKI/112RMKI/112MKI
Adjustment
Item
Preliminary
input
Signal
Adjustment
Point
|
Measurement
Method
/
Value
Adjusted
For
RB
Hef
IGE
AMES
ASAT
MEA
ABE
OUTPUT (RCA) :
Specs (#48) : Fig. 3-3
INPUT (Rear, RCA) :
63 Hz ~ 16 kHz/
-36 dBV
9. Overall frequency | Connection ($%) : Fig. 3-7
response
Sehr
10.
Level
difference
|
Connection
(#:¢%)
:
Fig.
3-7
between channels
F te RIVER NILES
DOLBY NR: OUT and IN
Check only
OUTPUT (RCA):
63 Hz ~ 6.3 kHz: within 3 dB
6.3 ~ 10 kHz: within 4 dB
INPUT (Rear, RCA) :
63 Hz ~ 10 kHz/
-36 dBV
OUTPUT (RCA):
400 Hz: within 1 dB
63 Hz ~ 6.3 kHz: within 2 dB
6.3 ~ 14 kHz: 3 dB
OUTPUT (RCA): 40 dB or more
INPUT (Rear, RCA) :
63 Hz ~ 14 kHz/
-36 dBV
Same as above
fat
11. Rec/repro level
fluctuation
BAL AILEH
INPUT (Rear, RCA):
Leh: no signal
Reh: 125 Hz/-10 dB
Record
a
125
Hz
signal
on
Rch
and
note
output
level
Then
invert
tape
and
play
Reh
track.
Check
leakage
level
against
the
output
reference
of
previously
recorded
portion.
Reh
t=
125Hz
OF
SERS
L.
TOHAMHERELNAVLTS,
RIF
-TFEREL,
BELALEORch
OWMHLNIVLOLERETS.
Same as above
fale
12. Track crosstalk
boy 7h7oR
b-2
13.
Channel
Connection
(#8)
:
Fig.
3-7
|
INPUT
(Rear,
RCA):
OUTPUT
(RCA):
30
dB
or
more
separation
1
kHz
B.PF.
connect
Leh:
1
kHz/-10
dBV
FIle
esNL—
|
1
kHz
B.PF.
He
Rch
:
no
signal
Yay
Find
the
difference
between
the
1
kHz
recorded
portion
(Lch)
and
the
“no
signal”
recorded
portion
(Rch).
UkH2
#RASED
(Loh)
EMME
SHB
(Rch)
LOBEMALKVOKEMETS.
Same
as
above
INPUT
(Rear,
RCA):
|
Check
only
OUTPUT
(RCA):
65
dB
or
more
ied
1
kHz/0
dBV
Record
a
1
kHz
signal
and
rewind
tape
to
mid
point
of
recorded
portion.
Erase
the
recorded
portion
with
no
input
signal
and
find
the
difference
between
the
1
kHz
portion
and
the
“no
signal”
portion.
lkHz
OB
SERER.
F-TERARLT-BEBETS.
KBEMS
LEM
COKEMETS.
14, Erasure
BER
OUTPUT (RCA):
MTT-5512 (NORMAL) : 45 dB or more
MTT-5562 (Cr02) : 47 dB or more
MTT-5571 (METAL): 47 dB or more
Reference level HELV: -10 dBV
15, Overall S/N
#®ES/N
No signal Check only
RES
No signal . L101/L201
SHES
Connection ($£:) : Fig. 3-7
Test tape: Same item 8.
OUTPUT (RCA):
Minimum bias leakage
NAT AR
Specs (#148) : -40 dBV or less
16, Bias leakage
NAT ABN
Connection (#¢) : Fig. 3-7
17

122MKIl/112RMKL/T1T2MKI
4. EXPLODED VIEWS AND PARTS LISTS
SHR LN-YURE
EXPLODED VIEW-1
18

EXPLODED VIEW!
I- 2
I+ 3
I= 4
I= 5
l= 6
I- 7
1-9
I-10
f~lI
1-12
f=13
1-14
1-21
1=22
1=23
124
REFNO.
PARTS NO.
*5801350900
*58006 12400
*5801 499600
5801348701
*5801566 100
*580 1568500
*580 1568000
*580 1568100
*580 1568200
*580 | 486600
5801501800
5801500700
5801349300
5504676000
*5801342500
5801568400
*5 783773006
*5 783534008
*5730017600
*5 783034020
INCLUDED ACCESSORIES
LUS]:U.SeA. [E]:EUROPE [UK]:U.K. [C] CANADA [J] : JAPAN
REFNO.
PARTS NO.
*5 700140501
*57001 40600
¥*5 700140701
*57803 15015
*5801512200
*5785225000
LA]:AUSTRALIA
DESCRIPTION
BONNET (B)
SCREW,BONNET M3X8(BLK)
FILTER,BONNET [C]
ANGLE
SCREW, STEP S=TITE 3X6
ESCUTCHEON, METER
PANEL, FRONT [1 12RMK2}
PANEL,FRONT [122MK31
PANEL FRONT [1 12MK2]}
ESCUTCHEON, D P=NI5=A
WINDOW, CASSETTE
LID, CASSETTE
KNOB
FOOT
PLATE, BOTTOM
LENS €112RMK2]
SCREW, BIND BeTITE MSX6(BLK ZN)
SCREW,BIND B=TITE M4X8(BLK NI)
SCREW, BIND BR=TITE M3X6
SCREW,BIND S-TITE M4X20
DESCRIPTION
OWNER'S MANUAL(J) [J}
OWNER'S MANUAL(F$G) IC,E]
OWNER'S MANUALCE) [EXCEPT J]
SCREW, OVAL COUN. M5XI5(N1)
WASHER, 5X1 2X3
WASHER, FIBER 5X1OX0.5T(BLK)
Parts marked with * require longer delivery time.
|
122MKI/112RMKI/112MKi
19
|
|
!
|

122MKI/112RMKI/112MKIL
_ EXPLODED VIEW-2
122mKI ,112MKo

EXPLODED VIEW-2
REF .NO.
PARTS NO.
*5801511300
2-2 *5801501500
2-3 *5801510000
2-4 *5801511200
2-5 ,*5801501900
2- 6 *5801502400
2-7 *5801510100
2- 8 '*5801344601
2-9 *5801502200
2-10 5225025500
2-11 *5801344701
2-|2 *580 1503000
2-13 *5801343600
2-14 *580 1345000
2-15 *5800620500
2-16 5801503700
2-17 *5801515800
2-18 *5801515900
2-19 *5200362100
*5200362110
*5200362120
2-20 5801412800
2-21 5801503600
2=22 *5800472201
2=23 5801503800
2-24 *580 1502500
2=25 *5200362200
2-2 *5801500500
2-27 *580 1598400
2-28 Vacant
2-29 5801502600
2-30 *5801567600
2=31 *5200362800
232 *5200362700
*52003627 10
*5200362720
2-33 3801567700
5801567800
2-34 5801568300
2-35 *520036 1500
¥*520036 1510
#520036 1520
2-36 5801575000
2-37 *580 1599900
2-38 *580 1567400
239 5801583600
2—40 *520036 1400
#520036 1 420
2=4I *5801567500
2~42 *5800933500
2=43 *5800933000
2-4 5800933600
(Continued on page 26)
DESCRIPTION
SPRING,LOCK ARM
ARM, LOCK
SIDE CHASSIS(L) ASSY
SCREW, STEP
ARM, SWITCH
CHASSIS(R) , SIDE
SUB SIDE HOLDER ASSY
HOL DER(L)
PANEL, CASSETTE
LED, SLF601C(ORG)
HOLDER (R)
PADCUL)
SPACER
HOLDER ASSY,CASSETTE
DAMPER
PANEL, TRIM
SPRING(L) ,HOLDER
SPRINGCR) ,HOLDER
P.CONT PCB ASSY [!12RMK2]
P.CONT PCB ASSY [122MK3}
P.CONT PCB ASSY [1 12MK2}
KNOB(BL)
KNOB, PITCH CONTROL
ROD, EJECT
BUTTON, EJECT PeNI5-A
LID, ESCUTCHEON
OP SW PCB ASSY
BRACKET ,PCB (OP)
SHEET, PROTECTION
BUTTON( 1) , OPERATION
HOLDER, COUNTER PCB
JOINT C PCB ASSY
COUNTER PCB ASSY []12RMK2)
COUNTER PCB ASSY [122MK3)
COUNTER PCB ASSY [1!12MK2]
BUTTON, OPERATION [1 12RMK2]
BUTTON, OPERATION [122MK3,1 12MK2]
WINDOW
JACK PCB ASSY [11 2RMK2]
JACK PCB ASSY {£122MK3]
JACK PCB ASSY [1 12MK2)
KNOB, SLIDE
SPRING, EARTH
HOLDER, JACK PCB
KNOB, ROTARY
VR PCB ASSY [122MG,112RMK2}
VR PCB ASSY [112MK2)
HOLDER,R VOL
GEAR B (122MK3]
GEAR A ASSY [122MK3}
BELT, TIMING [122MK3]
Parts marked with * require longer delivery time.
| 122mMKI/112RMK1/112MKI
Refer to
Refer to
Refer to
Refer to
Refer to
Refer to
Reter to
Refer to
Refer to
Reter to
Refer to
Refer to
Refer to
pages 40 & 45
pages 40 & 45
pages 40 & 45
pages 42 & 46
pages 38
pages 38
pages 38 &
9 go
ERG
pages 38 & 44
pages 39 & 45
pages 39 & 45
pages 39 & 45
pages 3!
pages 3
oo 2} Qo & &i
21