Teac Z-6000 - Page 26

2-6000 _
6-7 DBX PCB ADJUSTMENT
Note: , damage when disconnecting or reconnecting.
Since the DBX PCB assembly has been precisely adjusted at the 2. Make the following initial settings.
factory, this adjustment is not usually needed unless any of the e@ POWER switch: ON {for supplying power via the connector
trimmers have been changed, or any components on the PCB - to the DBX PCB),
have sustained damage. e NRSYSTEM switch: OUT
, « DBX PCB trimmers: Approximate center positioens
6-7-1 PREPARATION All other front panel switches and controls have no effect
1, Disconnect all connectors on the DBX PCB, except for J704/ on this adjustment.
P704 and J705/P705, Turn the deck OFF to prevent accidental
6-7-2 ENCODING ADJUSTMENT
iTEM SETTING
. RMSSYM
ADJUST
(or CHECK} RESULT
INPUT SIGNAL REMARKS
Refer to Figs.
6-15 and 6-16.
) TP.4/TP.2:
Clean 200 Hz sine-wave
P700-1/P700-4
100 H2/-8.2 dB (300 mv) | -R787/R837
P700-1/P700-4 P7G1-1/P701-4: *1 Reference 1
~ Encoding Jevel 400 Hz/-8.2 dB*1 (300 mv) | R727/R827 |” 29 gee (300 mv) *2 Reference 2
P70+-1/P701-4: ;
. VCASYM U700-3/U800-3 R7171/R811 A relatively straight horizontal line on the
‘scope face’. (Level variation: 5 mV or less)
: P701-1/P701-4:
sh al be ee Be +0,2 dB + 0.5 dB against Ref.2
. Encoding single : a ” {290 mV ~ 325 mV}
frequency Fig. 6-17 1
response 7 P701-1/P7014:
stole Ai haecar Check ~3,3 dB + 0.5 dB against Ref.2
10 kH2/-8.2 dB {300 mV} (194 mV ~ 217 mV)
P701-1/P704-4
P700-1/P700-4 2 *3 -60 dB
400 Hz/-68.2 dB*1 (300 wv) | Check ROSA IO [atari atl
5. Encoding ; , :
: : Fig, 6-17 P701-1/P701-4:
Operation tevel P700-1/P700-4 +10 dB + 0.5 dB against Ref.2. | *4 +2008
é 400 Hz/+11.8 dB*4 (3.00 V) | Check (0,896 V ~ 1.01 V) against Ref.1
Distortion: 0.3% or jess
6-7-3 DECODING ADJUSTMENT
7 ADJUST 7
ITEM setting | INPUT SIGNAL lor CHECK) RESULT REMARKS
ae P702-1 /P702-4 TP.3/TP.4: ’ Refer to Figs.
6. RMS SYM Fig.6-19 | “400 H2/-8.2 4B (300mv) = | B777/R877 | Giean 200 Hz sine-wave 6-15 and 6-16.
T
7 : is P702-1/P702-4 P703-1 /P703-4: *1 Reference 1
7. Encoding bevel | Fig. 6-19 400 H2/-8.2 dB*1 (300 mV} R767/R867 ~8.2 dB*2 (300 mV}
P703-1 /P703-4: :
8. VCASYM Fig. 6-20 U703-2/U803-2 R751/R851 A relatively straight horizontal line on the
: ‘scope face’. {Level variation: 5 mV or less}
aon ’ P703-1 /P703-4:
lear hanes Check -C.2 dB + 1 dB against Ref.2
106 Hz/-8.2 dB {300 mv} (261 mV ~ 329 mV}
9. Decoding single
_ Frequency |. Fig. 6-19 Ba Raa ae dcameecee eesaasecae
response : 7 P703-1/P703-4:
F ; Aen ab {300 mV) Check ica dB+7dB erie Ref.2
. - 504 mV ~ 634 mV
P703-1/P703-4:
| Check -60 dB + 1 dB against Ref.2
(267 wV ~ 337 wv)
*3 -30 dB
against Ref,1
P702-1/P702-4
400 Hz/-38.2 dB*3 (9.49 mV)
"| P703-1/P702-4
P702-1/P702-4 : :
400 Kz/+1.8 dB*4 (0,949 V) Check: rp ara tera ene
. Decoding
operation level
*4 +10 dB
against Ref.2
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