MCi JH-110 Series User manual

PROFESSIONAL
RECORDING
JH -110 Series
'•* ■ T-T rM -iiiimiii r ir-ii
User ’ s Gui e
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SERIES
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III
INTRODUCTION
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OPERATING PROCEDURES
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INSTALLATION
ALIGNMENT CHECK 4
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APPENDICES
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4007 N.E. 6th Ave.«Ft. Lau er ale, FL 33334»Phone [phone]Helex: 514362 MCI FTL
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The JH-110 Series inclu es the following systems:
the JH-110B System — 10 1 /2 ” reel — 1, 2 an 4 track — % ” an 1 /z ” tape
the JH-110B-14 System — 14 ” reel — 1, 2 an 4 track — Vi ” an V2 ” tape
the JH-110BC System — 10 1 /2 ” reel — DIN stereo broa cast recor er
the JH-110M System — 14 ” reel — isc mastering repro ucer
PROFESSIONAL
TAPE RECORDERS

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TABLE OF CONTENTS
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SECTION 1 — INTRODUCTION
1.1
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1.3
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1.4
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1.5
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SECTION 2 - OPERATING PROCEDURES
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SECTION 3 — INSTALLATION
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SECTION 4 - ALIGNMENT CHECK
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4.1
4.2
2.2.3
2.2.4
1.2.1
1.2.2
1.2.3
1.2.4
2-1
2-6
2-6
2-8
2-9
2-10
4-1
4-1
4-1
4-1
3-1
3-1
1-1
1-3
1-4
1-4
1-7
1-10
1-13
1-13
1-14
1-15
1-16
1-16
1-16
1-17
1-17
1-19
Intro uction .......................
Equipment Nee e ............
4.3 Transport Alignment Check
4.4 Au io Alignment Check ...
3.1 Unpacking ...........................
3.2 Groun ing Consi erations
2.1 Controlsan In icators .....................
2.2 Operating Proce ures .......................
2.2.1 Transport Motion Controls. ..
2.2.2 Reference an Spee Controls
RTZ III Autolocator Controls .
Au io Controls .........................
General Information ............
1.2 Transports .............................
JH-110B .....................
JH-110B-14 .................
JH-110BC ..................
JH-110M .....................
Au io Electronics .................
1.3.1 Stan ar Electronics.
1.3.2 Broa cast Electronics
1.3.3 Mastering Electronics
RTZ III Autolocator ............
1.4.1 RTZ III ........................
1.4.2 RTZ HIM ....................
Power Supply .......................
1.6 Options .................................
1.7 Accessories .........................

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LIST OF ILLUSTRATIONS
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TITLE
FIGURE NUMBER
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1-2
V.P. Cabinet Dimensions
1-1
1-2
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H.P. Cabinet Dimensions
1-2
1-3
1-3
1-7
1-4
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1-10
1-5
1-13
1-6
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1-15
Broa cast Au io Panel
1-7
1-15
1-8
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1-16
1-9
1-16
RTZ HIM Panel
1-10
1-20
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2-1
2-1
2-2
2-2
2-3
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2-2
2-4
2-3
2-5
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2-3
RTZ HIM Controls
2-6
Au io Controls an In icators
2-4
2-7
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Broa cast Au io Controls an In icators
2-5
2-8
2-6
2-9
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2-7
2-10
2-10
2-11
2-11
2-12
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4-2
4-1
4-2
4-2
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4-3
4-3
4-4
4-4
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JH-110BTransport Deck
JH-110BCTransport ...
JH-110M Transport ....
Au io Panel ..................
Transport Control Panel ...................
JH-110M Fast Motion Limit Control
JH-110B-14Torque Limit switches
Reference an Spee Controls ...
RTZ III Controls ...............................
Mastering Au io Controls an In icators
Transport Motion Controls .......................
RTZ HI Display ............................................
Au io Controls ..........................................
Hea A justments ..........
Repro Car A justments .
Bias Car A justments ...
Recor Car A justments
Mastering Au io Panel
RTZ HI Panel ................

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LIST OF TABLES
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TITLE
TABLE NUMBER
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Specifications, JH-11 OB an JH-11 OB-1 4 Transports
1-5
1-1
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Specifications, J H-11 OBC Transport
1-8
1-2
Specifications, JH-110M Transport
1-11
1-3
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Specifications, Stan ar Au io Electronics
1-14
1-4
Specifications, Broa cast Au io Electronics
1-14
1-5
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Specifications, Mastering Au io Electronics
1-16
1-6
Specifications, RTZ III
1-17
1-7
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1-8 Input Power Specifications
1-17
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1-18
1-9 Or ering Numbers
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V

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SECTION I
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INTRODUCTION
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1
General Information
1.1
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Page 1-1
The JH-110 series of professional tape recor ers
consist of a wi e range of mo els esigne for a
variety of applications. Mo els are available for
use with 1/4 inch, 1/2 inch, an one inch magnetic
tape, for mono, stereo, 4-track, an 8-track
recor ings. All mo els accommo ate 10-1/2 inch
or smaller metal or plastic reels; some mo els ac 
commo ate up to 14 inch reels. DIN hub a apters
can be use with any mo el.
JH-110B tape recor ers are available in two tape
spee ranges. High spee transports operate at
7-1/2, 15, an 30 inches per secon (19, 38, an 76
cm/s); low spee transports operate at 3-3/4, 7-1/2,
an 15 inches per secon (9-1/2, 19, an 38 cm/s).
Changing the spee of the transport automatically
selects the proper au io equalization for that
spee . Tape spee can also be controlle by an
Both cabinets are mounte on casters for mobil 
ity. The recor /playback au io electronics are
mounte in rawers an the transport base is
hinge , making all components easily accessible.
All mo els can also be or ere unmounte for in 
stallation in stan ar 19 inch equipment cabinets.
Cabinet imensions an weights are given in
figures 1-1 an 1-2.
There are two cabinet styles for the JH-110B, the
variable profile cabinet an the high profile
cabinet. The variable profile cabinet houses from
one to four channels of recor /playback elec 
tronics, the transport, an its power supply. The
high profile cabinet houses from one to eight
channels of recor /playback electronics, the
transport, an its power supply.
external source or by a variable internal source for
operation at non-stan ar spee s.

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IS.
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TW27B-I4
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Variable Profile Cabinet Dimensions
Figure 1-1
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TW27B-I5
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Figure 1-2 High Profile Cabinet Dimensions
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Page 1-2
WEIGHT:
243 lbs. 4 Track
109 kg
WEIGHT:
237 lbs. 2 Track
107 kg
289 lbs. 8 Track
130 kg
21 1/16".
53.58 cm
27 3/4 ” .
70.49 cm
43 I/2"
110.5 cm
260 lbs. 4 Track
117 kg
251/2
64 cm
37"
94 cm
24 7/8"
63.25 cm
24 ”
60.96 cm
29 ”
73.66 cm
13 1M ” __
33.66 cm
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25 3/4"
65.4 cm
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31 1/2 ”
80 cm
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9 1/19"
23 cm
(2 TIERS)
7 11/16 ”
19.53 cm
15 3/4"
40 cm
55 1/4 ”
140.34 cm
(4 TIERS)
16 1/16"
40.8 cm
(4 TIERS)
48 1/4 ”
122.56 cm
(2 TIERS)
35"
68.9 cm
24"
61 cm

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1.2
TRANSPORTS
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QUICKCHANGE HEADSAND TAPE GUIDES
FOR FAST V. INCH TO W INCH CONVERSION.
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r, ’ jg ' , ito. rT~T ' , gi .
w; " 'sifyA ' ec? |
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•CORO
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HEAD SHIELD CONTROL
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Figure 1-3 JH-110B Transport Deck
Page 1-3
There are basically four mo els of the JH-110B
tape transport:
the stan ar JH-110B 10-1/2 inch reel transport
the JH-110B-14 fourteen inch reel transport
There are a variety of options for each mo el to fit
the user ’ s specific nee s.
the JH-110BC broa cast transport
the JH-110M isc mastering transport.
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SOLID STATEPOWER CONTROLCIRCUITS
ANO TTL LOGIC DYNAMIC BRAKING USED EX 
CLUSIVELY EXCEPT FOR FAIL SAFE BAND
BRAKES USED DURING TAPE BREAK OR POWER
FAILURE
?WZ
TAPE LIFTERS
AUTOMATIC WITH MANUAL OVERRIDE.
RUGGED DECK PLATE
MADE FROM 3 LAYERS OF 1<B INCH JIG PLATE
WITH AN EXCLUSIVE EPOXY ADHESIVE. 3 PLY
ASSEMBLY GIVES GREATLY IMPROVED DIMEN 
SIONAL STABILITY.
PHASE LOCKED CAPSTAN MOTOR
PROVIDES THE ULTIMATE IN ACCURATE LONG
TERM TAPE SPEED. TAPE SPEED IS NO LONGER
A FUNCTION OF LINE VOLTAGE OR FREQUEN 
CY CAPSTAN SHAFT MACHINED FROM EX 
TREMELY HARD NON MAGNETIC CERAMIC
MATERIAL.
SERVO CONTROLLED REEL MOTORS
DC TORQUE MOTORS PROVIDE CONSTANT
TAPE TENSION AT ALL SPEEDS AND CONTROLL 
ED TENSION IN FAST MOOES SPACE AND
POWER PROVIDED FOR ANY REEL S'ZE UP TO 14
INCHES.
EDIT BUTTON
HAND SPOOL EDIT FREES UP REEL MOTORS
ALLOWING TAPE TO BE MOVED BY HAND.
TAPE DUMP EDIT DISABLES TAKE UP REEL
SPILLING TAPE OFF RIGHT SIDE OF DECK.
—
a LUULr-Q LjJ
-AIR DAMPED DANCER ARM
HELPS MEET RIGID FLUTTER SPECIFICATIONS
WHILE ALLOWING A RAPID START TIME.
RECORD AND PLAY BUTTONS
PRESSING RECORD BUTTON WHILE IN PLAY
MODE PUTS MACHINE INTO RECORD MODE
PRESSING PLAY BUTTON WHILE IN REC
MODE PUTS MACHINE INTO PLAY MODE.
TORQUE LIMIT SWITCH
THREE SWITCHES ON JH-110B-14 ONLY SELECT
CORRECT MAXIMUM TORQUE FOR REEL SIZE
AND TAPE THICKNESS.
REAL TIME TACHOMETER
PROVIDES LINEAR TAPE TRAVEL INFORMATION
IN REAL TIME FOR THE RTZ 111.
MANUAL VELOCITY CONTROL
MACHINE IN STOP MODE:
HOLDING JOYSTICK CAUSES TAPE TO
SHUTTLE IN EITHER DIRECTION AT ANY
SPEED SELECTED-WITH TAPE ON HEADS.
MACHINE IN FAST MODE
THE FAST WINO SPEED SERVOS TQ WHAT
EVER SPEED THE JOYSTICK COMMANDED
WHEN LAST TOUCHED.
TAPE BREAK SENSOR
SENSES TAPE BREAK OR END OF TAPE OP
TICALLY USES FOCUSED LIGHT EMITTING
DIODE AND INFRARED SENSOR TO INSURE IM 
MUNITY TO ROOM LIGHT
III 1 — RTZ III >
III DISPLAYS TAPE POSITION OR VELOCITY.
Ill RETURNS TAPE TO ZERO OR ANY OF FOUR PRO-
III GRAMMED POSITIONS.
/ / * ------- TAPE SPEED SELECT
II 3 SPEED SWITCH SELECTS CORRECT EQ
I I FOR EACH SPEED.
/ REFERENCE SELECTOR
/ VARIABLE- UPPER KNOB PERMITS VARIATION
/ IN TAPE SPEED.
/ FIXED — CRYSTAL CONTROLLED REFER-
/ ENCE FOR CAPSTAN SERVO.
/ EXTERNAL — WIDE RANGE SPEED CONTROL
/ USES 19.2kHz or t5VDC CONTROL
/ SIGNAL INTERFACE FOR AUDIO-
/ AUDIO. AUDIO-VISUAL & AUDIO-
' FILM EQUIPMENT.
SLAVE - FOR SLAVING DECK To MCls
JH 45 SMPTE AUTOLOCK.
-VARIABLE SPEED CONTROL

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JH-110B
1.2.1
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JH-110B-14 1.2.2
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Page 1-4
The JH-110B, shown in Figure 1-3, is the stan ar
mo el three spee playback an recor tape
transport. Full wi th 1/4 inch, two track 1/4 inch,
an four track 1/2 inch tape versions are available.
All versions can use 3 inch to 10-1/2 inch metal or
plastic reels. A torque limit switch lowers the star 
ting torque of the reel motors for small reels or for
elicate tapes.
Two servo controlle e motors regulate the tape
tension, keeping it constant uring all mo es of
operation. An infare tape loa sensor brakes the
supply an take up reel motors at the en of roll,
when the tape breaks, or when the tape is remov 
e from the sensor slot. An E it switch can
isable the tape tension servo allowing the reels
to be move by han without resistance from the
motors. The manual velocity control (MVC)
joystick gives complete control of the tape ’ s mo 
tion an spee from either the stop mo e or the
forwar /rewin mo es.
To facilitate hea alignment an maintenance, the
hea s are mounte on a precision machine hea
bri ge assembly. Loosening two hex screws
separates the hea bri ge from the transport
eck. Removing the hea bri ge oes not affect
the hea alignment. Swapping hea assemblies
an roller gui es quickly converts 1/2 inch tape
machines to 1/4 inch tape.
The JH-110B mounts in the variable profile
cabinet; its imensions are in icate in Figure
1-1. Specifications for the JH-110B are liste
in Table 1-1.
The JH-110B-14 contains all the features of the
JH-110B plus the capability of mounting 14 inch
reels. Three torque selection switches a just the
reel motor torque for ifferent size an weight
reels. The JH-110B-14 also mounts in the variable
profile cabinet.
Specifications for the JH-110B-14 are liste in
Table 1-1.
Stan ar hea bri ges contain three hea s:
repro uce, recor /cue an erase. A itional
mounting space is provi e for a preview hea
which may be or ere as an option. Tape lifters
move the tape away from the hea s uring the fast
forwar an rewin mo es to re uce hea wear.
During playback an recor mo es, a ceramic
capstan an pinch roller arrangement controls the
tape spee . A phase locke loop servo system
rives the e capstan motor. The servo locks the
capstan spee to a crystal oscillator reference. A
reference switch can alternatively select a voltage
controlle oscillator (VCO) or an external signal as
the reference for the phase locke loop. The VCO
allows variable capstan spee control for
operating at any spee 20% above or below the
stan ar spee s. The transport will accept either
a clock frequency (19.2 kHz) or a variable e level
(-5 to +5 volts) as an external reference input.
Available as optional equipment on all the
JH-110B ecks is the RTZ III autolocator. The
autolocator returns the tape to the zero position,
or positions the tape at any of four programmable
positions. A LED isplay isplays the tape posi 
tion in minutes an secon s of actual playback
time, or the tape spee in inches per secon .

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TABLE 1-1
SPECIFICATIONS
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JH-110B an JH-110B-14
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R l Siz
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Tap Width
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NAB or DIN track separation
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Tap Sp ds
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Variable
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Variable
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Long T rm Sp d Stability better than 0.02%
Start Tim
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R wind Tim
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Wow and Flutt r
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Page 7-5
Tap T nsion
% inch
1 /2 inch
Low Spee (Option)
Fixe
JH-110B
JH-110B-14
High Spee (Stan ar )
Fixe
900 msec @ 30 ips
500 msec @ 15 ips
500 msec @ 7 ’ /2 ips
85 sec for 2500 ft.
140 sec for 4800 ft.
3 to 18 ips
(8 to 46 cm/s)
6 to 36 ips
(15 to 91 cm/s)
3 to 101/2 inches
3 to 14 inches
1 /4 inch full wi th
1 A inch 2 track
1/2 inch 4 track
Measure between
capstan an roller gui e
Phase locke loop e
capstan controlle
reference to fixe crystal
oscillator or variable
VCO output
NAB or EIA, plastic or metal
reels, DIN hubs optional
30 ips < 0.022%
15 ips < 0.035%
71/2 ips < 0.055%
3%, 7 1 /2 & 15 ips
(9 1 /2, 19 & 38 cm/s)
7V2, 15, & 30 ips
(19, 38 & 76 cm/s)
To 0.1% DIN 45507 flutter
with 10 1 /2 inch reels
DIN 45507 weighte
DIN 45507 weighte
DIN 45507 weighte
5 ’ /2 ± 1 /4 oz.
5% ± 1 /4 oz.
at all tape spee s
beginning to en of reel

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TABLE 1-1 SPECIFICATIONS (continu d)
Fr qu ncy Rang
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4 track
2 track
Signal to Nois * mono
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Weighte B(A)
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Harmonic Distortion*
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3r harmonic
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2n harmonic
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better than 80 B at 1 kHz
Bias and Eras Fr qu ncy 120 kHz
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Page 7-6
3r harmonic
3% fluxivity level
D pth of Erasur
reference to 250nWb/m
* Typical values given. Specifications are largely epen ent on tape formulation. Also, the perfor 
mance of any particular type of tape varies from batch to batch.
Recor /Repro uce
(Using Ampex 456 tape)
Recor /Repro uce
reference to 510nWb/m
30 ips, AES
15 ips, NAB
7 1 /2 ips, NAB
30 ips, AES
15 ips, NAB
71/2 ips, NAB
30 ips, AES
15 ips, NAB
71/2 ips, NAB
30 ips, AES
15 ips, NAB
71/2 ips, NAB
30 ips, AES
15 ips, NAB
7 1 /2 ips, NAB
30 ips, AES
15 ips, NAB
7 1 /2 ips, NAB
<0.35%
<0.52%
<1.6%
<0.10%
<0.10%
<0.10%
1040nWb/m
1020nWb/m
1000nWb/m
68
68
67
74
70
70
64
64
63
71
68
67
64
64
63
70
68
67
1kHz fun amental
at 510 nWb/m
50Hz to 28 kHz
30Hz to 24 kHz
30Hz to 20 kHz
+0.75, -2 B
+0.75, -2 B
+0.75, -1.5 B

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1.2.3
JH-110BC
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Figure 1-4 JH-110BC Transport
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Page 1-7
The JH-110BC is a two spee playback an recor
broa cast tape eck. It can be operate in either
DIN stereo or mono mo es. The broa cast eck
uses 1/4 inch recor ing tape an will accom 
mo ate any size reel or platter up to 30 cm in
iameter.
In a ition to the stan ar JH-110B features, the
Broa cast eck inclu es the RTZ III, built-in tape
scissors an a tape marker for e iting.
Specifications for the JH-110BC are liste in Table
1-2.

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SPECIFICATIONS TABLE 1-2
JH-110BC
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DIN hubs stan ar 30 cm max DIN
R l Siz
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Reel locks optional 3 to 11% inch EIA or NAB
DIN stereo
1 /4 inch 2-track
Tap Width
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Tap Spee s
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Fixe
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Variable
better than 0.02%
Long T rm Spee Stability
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Tape Tension
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Start Tim
R wind Tim
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Wow and Flutt r
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Fr qu ncy Range
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Signal to Nois * st r o mono
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Unweighte , 20 Hz ■ 20 kHz
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Weighte B(A) RMS
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Weighte , CCIR 468, RMS
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Page 1-8
Recor /Repro uce
(Using Ampex 456 tape)
Recor /Repro uce
reference to 510nWb/m
7Vz an 15 ips
(19 an 38 cm/s)
2 to 22 ips
(5 to 56 cm/s)
500 msec @ 15 ips
500 msec @ 7 1 /2 ips
85 sec for 2500 ft.
140 sec for 4800 ft.
15 ips, IEC
71/2 ips, IEC
15 ips, IEC
7'/2 ips, IEC
15 ips, IEC
7 ’ /2 ips, IEC
15 ips, IEC
71/2 ips, IEC
65
63
72
68
62
58
Phase locke loop
e capstan control
reference to fixe
crystal oscillator
or variable VCO
Measure between capstan
an roller gui e
64
62
69
66
60
56
15 ips < 0.035%
7Vz ips < 0.055%
To 0.1% DIN 45507 flutter
with 1O'/2 inch reels
+0.75, -2 B
+0.75, -1.5 B
DIN 45507 weighte
DIN 45507 weighte
5 1 /2 ± 1 /4 oz .
at all tape spee s
beginning to en of reel
30Hz to 24 kHz
30Hz to 20 kHz

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Harmonic Distortion*
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3r harmonic
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2n harmonic
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better than 80 B at 1 kHz
Bias and Eras Fr qu ncy 120 kHz
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Page 1-9
D pth of Erasur
reference to 250nWb/m
* Typical values given. Specifications are largely epen ent on tape formulation. Also, the perfor 
mance of any particular type of tape varies from batch to batch.
3r harmonic
3% fluxivity level
15 ips, IEC
,7Vz ips, IEC
15 ips, IEC
7Vz ips, IEC
15 ips, IEC
772 ips, IEC
<0.52%
<1.6%
<0.10%
<0.10%
1020nWb/m
1000nWb/m
1kHz fun amental
at 510 nWb/m
TABLE 1-2 SPECIFICATIONS
(continu d)

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JH-110M
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1.2.4
tape spee s.
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Figure 1-5 JH-110M Transport
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Page 7-70
The JH-110M is a three spee isc mastering eck
inten e for use with full an half revolution elay
isc mastering systems. In a ition to the stan 
ar JH-110B features, the mastering eck in 
clu es a tape elay, a fast motion limit control,
an an enhance RTZ HIM autolocator. Several
tape roller gui es provi e time elays between the
two playback hea s. The tape path aroun these
roller gui es can insert a half or full revolution
elay for 33-1/3 or 45 rpm iscs at any of the three
The JH-110M is available in 1/4 inch stereo an
mono versions. Specifications for the JH-110M
are liste in Table 1-3.
The fast motion limit potentiometer limits the
maximum tape spee in the fast forwar an re 
win mo es for gentler spooling. The RTZ HIM,
along with the stan ar locating functions, stores
positions for groove expansion, ban ing, an en
of isc lea -out functions.

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TABLE 1-3
SPECIFICATIONS
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JH-110M
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3 to 14 inch NAB or EIA
R l Siz
Tap Width
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Tape Sp ds
Fixe
1
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Variable
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Long T rm Spee Stability better than 0.02%
Tap T nsion 5 1 /2 ± 1 /4 OZ.
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Start Tim
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R wind Tim
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Wow and Flutt r
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Fr qu ncy Rang
(Using Ampex 456 tape)
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2 track
Signal to Nois * mono
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reference to 510nWb/m
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Weighte B(A)
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Page 1-11
30 ips, AES
15 ips, NAB
71/2 ips, NAB
30 ips, AES
15 ips, NAB
7V2 ips, NAB
30 ips, AES
15 ips, NAB
71/2 ips, NAB
900 msec @ 30 ips
500 msec @ 15 ips
500 msec @ 7 1 /2 ips
30 ips < 0.022%
15 ips < 0.035%
71/2 ips < 0.055%
% inch full wi th
% inch 2 track NAB
1 /4 inch 2 track DIN
DIN 45507 weighte
DIN 45507 weighte
DIN 45507 weighte
68
68
67
74
70
70
64
64
63
70
68
67
variable 85 sec to 11 1 /2 min.
for 2500 ft.
5 to 45 ips
(13 to 114 cm/s)
7V2, 15, & 30 ips
(19, 38 & 76 cm/s)
At all tape spee s
beginning to en of reel
To 0.1% DIN 45507 flutter
with 10 1 /2 inch reels
Phase locke loop e
capstan control
reference to fixe crystal
oscillator or variable
VCO.
+0.75, -2 B
+0.75, -2 B
+0.75, -1.5 B
50Hz to 28 kHz
30Hz to 24 kHz
30Hz to 20 kHz

TABLE 1-3 SPECIFICATIONS (continu d)
Harmonic Distortion*
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3r harmonic
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2n harmonic
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Min elay Time
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30 ips
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15 ips
7 1 / 2 ips
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30 ips
15 ips
71/2 ips
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Page 1-12
* Typical values given. Specifications are largely epen ent on tape formulation. Also, the perfor 
mance of any particular type of tape varies from batch to batch.
Delays
Max elay time
1 R volution
D lay (Capps
or Scully)
1/2 Revolution
Delay (Neumann)
3r harmonic
3% fluxivity level
30 ips, AES
15 ips, NAB
7Vz ips, NAB
30 ips, AES
15 ips, NAB
7Vz ips, NAB
30 ips, AES
15 ips, NAB
7Vz ips, NAB
30 ips
15 ips
772 ips
3% ips
30 ips
15 ips
7 1 /2 ips
3% ips
1.8 sec.
3.6 sec.
7.2 sec.
14.4 sec.
0.21 sec.
0.46 sec.
0.84 sec.
1.68 sec.
<0.35%
<0.52%
<1.6%
<0.10%
<0.10%
<0.10%
1040nWb/m
1020nWb/m
1000nWb/m
54 inch (137cm)
elay Loop
6.3 inch (16 cm)
elay loop
Delay may be set for
several values between
min an max.
1kHz fun amental
at 510 nWb/m
33 1 /a RPM
(1.8 sec)
54 ±.2 in.
137 ±.5cm
27 ±.2 in.
68.6 ±.5cm
13.5 ±.2 in.
34.3 ±.5cm
33 1 /3 RPM
(0.9 sec)
27 ±.2 in.
68.5 ±.5cm
13.5 ±.2 in.
34.3 ±.5cm
6.7 +.2 in.
17.1 ±.5cm
45 RPM
(1.33 sec)
40 +.2 in.
101.6 ±.5cm
20 ±.2 in
50.8 ±.5cm
10 ±.2 in.
25.4 ±.5cm
45 RPM
(0.66 sec)
20 ±.2 in.
50.8 ±.5cm
10 ±.2 in.
25.4 ±.5cm
5 ±.2 in.
12.7 ±.5cm

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S x
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© ©
«
©
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Figure 1-6 Au io Panel
I
1.3
Au io Electronics
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1.3.1
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I
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I
Each channel consists of a front panel, which sup-
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Page 1-13
Specifications for the stan ar au io electronics
are liste in Table 1-4.
Switches on the Repro an Recor Mo ules
select either NAB or IEC stan ar equalization.
When properly aligne to specifications the
equalization stan ar s can be switche without
any realignment necessary.
ports the meter an switches, an a Mother Boar ,
which forms the bottom of the assembly. The I/O,
Recor , Repro uce, an Bias circuit boar s are
plug in mo ules which mount irectly onto the
Mother Boar . The channel electronics can be
easily remove from the rawer by removing two
screws in the front panel an four screws in the
Mother Boar . All connections to the Mother
Boar are ma e via plug in connectors. Since all
the channel electronics are i entical, mo ules
can be swappe from channel to channel for
troubleshooting or maintenance purposes.
Stan ar Au io Electronics
(JH-110B,-14)
S'
CA1 o ©
M>1 FUADt C1A5
The stan ar JH-110B au io electronics are
house insi e a 3-1/2 by 17-3/4 by 12-1/8 inch
rawer (8.9x45.1x30.8 cm). Each rawer hol s two
channels of au io electronics. Single track op 
tions contain one channel mounte in the left si e
an a blank panel covering the right si e of the
rawer. Variable profile cabinets hol one or two
rawers; high profile cabinets hol two or four.
These rawers exten from the cabinets on
latching sli e rails for access to the au io printe
circuit boar s an components. Au io input, out 
put, an power connectors are locate at the rear
of the rawers. The rawers can be exten e on
their sli e rails without isconnecting any cables.
ntnto povt cut
I ' “

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Broadcast Audio El ctronics
1.3.2
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I
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Lin Input
Lin Input
Level
Level
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Impe ance
10 k Q balance
Hea room 30 Bm at clipping
Hea room
30 Bm at clipping
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Lin Output
Lin Output
Level
+4 Bm at 0 VU
Level +6 Bm at 0 VU
100 Q balance
Maximum Output +24 Bm at clipping
Maximum Output +24 Bm at clipping
Equalization Equalization
High Spee
Low Spee Option
15 ips NAB/IEC
I
30 ips AES 15 ips NAB/IEC
7 1 /2 ips NAB/IEC
15 ips NAB/IEC 71/2 ips NAB/IEC
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772 ips NAB/IEC 3% ips NAB
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Page 1-14
Source
Impedance
Source
Impedance
The broa cast au io electronics mount in two
rawers similar to the stan ar au io electronics.
The bottom rawer contains two channels of
au io electronics, similar to the stan ar au io
electronics. The top rawer contains the monitor
amplifier an speaker plus the controls an
meters.
Two track stereo or mono playback/recor mo es
are switch selectable. The monoral mo e recor s
the left line input onto both right an left tracks. In
repro both tracks are summe together an ap 
plie to the left line output.
Input
Impe ance
Specifications for the broa cast au io electronics
are liste in Table 1-5.
10 k Q bri ging line
balance
150 Q balance ,
transformer couple
-15 Bm to +24 Bm
for 0 VU
-15 Bm to +24 Bm
for 0 VU
TABLE 1-4
STANDARD AUDIO SPECIFICATIONS
TABLE 1-5
BROADCAST AUDIO SPECIFICATIONS
The Mother Boar , I/O, an Bias Mo ules of the
broa cast eck are similar to the stan ar au io
mo ules. The Repro an Recor Mo ules
however, are unique to this transport. These
mo ules playback an recor at preset levels
only, there are no repro or recor level controls on
the broa cast front panel. Also, since this is a two
spee transport, the Repro an Recor Mo ules
contain only high an low spee equalization net 
works.

I
1
I
Figure 1-7
Broa cast Au io Panel
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1.3.3 Mastering Au io Electronics
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Figure 1-8 Mastering Au io Panel
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Page 1-15
The Mother Boar an Repro Mo ules of the
mastering eck au io channels are similar to
those of the stan ar au io channels. Mo ules
unique to these au io electronics are the Front
Panel Equalization Boar an an output only ver 
sion of the I/O Amplifier Mo ule. Since this is a
repro uce only machine, there are no Bias or
Recor Mo ules.
Specification for the mastering eck au io elec 
tronics are liste in Table 1-6.
The mastering eck au io electronics are
mounte in exten able rawers similar to the
stan ar au io electronics. Two i entical chan 
nels fit into each rawer. The top rawer contains
the repro circuitry for the preview hea , the bot 
tom rawer contains the repro circuitry for the
repro hea . High frequency an low frequency
equalization controls for each of the three spee s
are provi e on the front panel. Alternatively, a
switch on the front panel can select preset
equalization (NAB or IEC).