Studer A 721 Service Manual

Page 1

5' @E La} A721 Em
ENGLISH
CDNTENTs Page CCNTENTS Page
1. CENERAL E 1/2 1. GENERAL E 1/2
1.1 OPERATING coNTRDLs E 1/2 1.1 OPERAIINK. CONTROLS E 1/2
1.2 DONNECTDR PANEL E 1/2 1.2 cDNNECToR PANEL E 1/2
1.2.1 Pin assignmenr E 1/3
1.3 sTARriuP PRucEDuRE E 1/5
1.3 START-LIP PPDCEDNRE E 1/5
1.5 REFWDUEE FUNCHOMS E 1/5
1.5 REPRoDucE EuNcTIuNS E 1/5
1.5 RECCRD EuNCTIDNS E 1m 1.5.1 Inserting the Cassene E 1/5
1.5.2 TAPE YYPE Ha} E 1/5
1.6 SPECIAL ELINCTIaNs E 1/7 1.5.3 PLAV TIME {3) E 1/5
1.5.5 NR SYSYEM [W] E 1/5
1.7 REALAYIHE CouNTER [111 E 1/5 1.5.5 PLAY MI E 1/5
1.5.4: DuTPuT LEVEL [21) E 1/5
1.: AuTDNATIc CALIBRATIDN E 1/9 1.5.7 STcP [31 E 1/5
1.5.3 Fast Fan/era >> [5] E 1/5
1.9 TECHNICAL APPENDIA E 1/10 1.5.9 Rewind << [a] E 1/5
1.5.10 LDCATE [7) E 1/5
2. DISASSEMBLV INSTRUCUDNS E 2/1 1.5.11 MONITOR [DI E 1/5
2.1 GENERAL INFORMATION E 2/1 1.5 RECDRD FUNCTIONS E 1/6
1.5.1 HPx EILTER [231 E Me
2.2 HOUSING E 2/2 1.5.2 INPLJY LEVEL [16] E 1/3
1.5.3 Peak program indicator nuI E 1/5
2.3 DPERATINC. PANEL E 2/3 1.5.5 RECDRC [2] E 1/5
1.5.5 PAusE T1I Fade in/om E 1/6
2.5 TAPE DEEK E 2/¢
1.5 SPECIAL EuNcTIoNS E 1/7
ELECTRICAL Hum/LES E 2/7 1.5 1 CNL/UNCAL 115] E 1/7
1.5.2 PHCNES [15) E 1/7
EuNCTICNAL DESCRIPTIDN E 3/1 1.0.3 PHONES voLuHE 4+ 117/20] E 1/7
1.5.5 LDDP (251 E 1/7
3.1 oPERATINC PANEL E 3/3 1.5.5 sAvE STATUS [2m E 1/7
1.0.5 RECALL [27) E 1/7
3.2 TAPE DECK 1.720.121 E 3/3 1.c.7 CANCEL [28] E 1/7
1.6.8 ADDRESS Lo: 1 / Loc 2 [29/351 E 1/7
3.3 svsTEH coNTRuL A721 1.721.225 E 3/5 1.3 D MIN / SEC [30/311 E 1/7
1.3.111 sToRE I32I E 1/7
3.5 CAPsTAN HDTDR CDNTRDL 1 721.230 E 3/5 1.5.11 FOUER (33] E 1/3
3.5 REHDTE INTERFACE A721 1.721.315 E 3/7 1.7 REA.-T1NE CDDNTER [111 E 1/8
1.7.1 ADJ _/. [131 Adjustment at reaL-time
3.5 BALANCE IN/DuT A721 1.721.285 E 3/3 indvution E 1/3
3.7 NR SYSTEM 1.721.290 E 3/111 1 8 AUTOMATIC CALIPRATICN E 1/7
1.3.1 ALIEN [22] E 1/9
3.5 RECORD CDNTRDL A721 1.721.305 E 3/11 1.3.2 Calibraxion E 1/9
1.3.3 CaLibrmon errors E 1/9
ALIGNMENY INSTRUCTIDNS E 5/1
1.9 TECHNICAL APPENDIX E 1/1u
5.1 CENERAL INFDRMAUGN E 5/1 1.9.1 SERIAL LINK [391 E 1/10
1.9.2 ParaLLeL remore Control sockeC [33: E 1/10
5.2 MEENANICAL ADJUSYMENYS E 5/2 1.9 3 FADER SIARI E 1/11
1.9.5 Timer aperatian E 1/11
5.3 ELECTRICAL ALIGNMENYS E 5/3 1.47.5 care and maintenance 12/ Me cassene
taoe deck E 1/11
5.5 EALIBRAUUN or THE AuDID DATA E 5/R
5 CIRCUIT DIAGRANS 5/1
a, SPARE PARTS 0/1
7. TECHNICAL DATA 7/1

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STMIEJELFX A721 E III

GENERAL

Check "15 the Uri: voLtage setenor sening matches
your locaL Line voLta e.
H J [1 1 [9 [a [7 [8 (S 1 JKE ] [Z [1 J X. US is not the cage, adjust the voltage SELECKOP and
check "IE rating of the primary fuse (Secion 2.5.5).
Fuse ratings:
J "UU ... 1] V AC: YT SUD MA I 250 V (SUPER SLOW)
meant we Kcnnnm STUDER I seep zuu 2m v AC: TT 250 ml / 250 v (SUPER sum
«Y [HVORTANTE _
sag-E15 \ i i 1 i i i \ Ii I 1
Men the unit is switched 0H it is not disconnected 2 "new ground
iron the mains. certain components inside me unii 3 Neural
i.» rAiu-ru wax-wt Mimi-u In rte-Kt A! nuts: MA are under Line vultage

o o *él [:1

M W W. 1.1 OPERAYIMG cMrRoLs
U U W 3 Si
® (9 i \ (ih Pause key [20] Neadphanes \iuLume u)
i i [21 Record key ui'ni feedback LED (21: output tevet controL (only enabled in unan mode)
(31* Stop key (221 catipration data memory seLeu as oeu as
mi. Play Key catiptation SKErtt
(51" Fast ioruard XEY [23} Key {or multiptex ViLtel (only acxive if DOLEV E
[61" Remind key Dr C 5 Siiithed DH)
2] 1 no] 2] [22] [2 [2°] 2 3m [32] [m m Locate Key, searsnes tne Last reproduce/record [21.1 cassette tape transport
3] 5] 7' 2 [23 [25] [2" 29] [3 [33"] starting position [251 Key ior LODF mode I headbLock Liit
[my rm m cassette any time; coo, con, con, man Izo) Store operaiing state
[91 Key «or rAPE/souRcE changeavei (27) Retrieve memory content Lac 1 and Lot 2
mm FeaK program and status indicator [231 Erase key it"- me 1 and Lot 2
(m nisptay for run time, Lac 1, LOC 2, and LOOP [291 Memory to: 1
{12] Indicator tor uncaiiorated input and output ieyei (301 Minutes input for memories L06 1 and LDC 2
[13] Adjustment 0' rezL-time indy'catian [31] Seconds input for memories LOC 1 and LDC 2
[1A] Headphones socKet {321 Key lor storing Loc 1 and Lu: 2
[151 Key ior ceiibrated/uncaiiorated input and output :33» Oil/Standby key
ievei :31.) Memory me :i
[15] Inpuk leveL control Lonly enabled in HMCAL modeli
[m Headpnones yoiume (v) s we cassette teoo recorder can be suitcnsd on MreuLy
(151 Tape type aetector (manuaL); ior cassettes coded oy pressing one at mass Keys. The corresponding
according to m: standards the tape type is aui-os function is Executed immediately.
mafically detecxed and Seli For switching Dif, the PEI-DER button [33] musi be OFESE-
(W1 suiten ion noise reduction system: ed ior at teasi. one second (protection against inad-
DDLBY B, DULEV C Dl' 07F VEV'KEVK OH-Sfliflihiflg.

1.2 connector panel

{351 BaLancea inpm (XLR)

M [so] satanced output (XLR)
DW ® [37] Power inlet I line vnltage seiecmr
[3a] o-type connector «or optional parakleL remote con-
(9 w w MW 5: (rel
4 .7 ¥eyeitwm J [391 SERIAL LINK socket (ior operation uitii REVOX 52:03
i m - TIMER EDNYRULLER)

{351 (36] (37] [38] [3?]