Marantz SD9000 - Page 34

5. Playback Output Adjustment
SETUP
1. Power voltage:— 50 or 60 Hz AC voltage rated for
the unit to be used in a market country.
. Tape selector switch position: - NORMAL.
. Load:— Measuring instrument input impedance.
. Output terminal:— J107, J207.
. Test tape used:— MTT-150.
. Tape speed selector switch: - STANDARD.
PROCEDURES
Play the test tape MTT-150 back. Adjust R176 and
R276 (50 kQ each) for 580 mV playback output
level.
NOTE: Proceed both for the right and left channels
in the same manner.
Mode: Playback
MTT-150
J107, J207
CAUTION
@ This adjustment should be performed after the one
for the playback equalizer. If the playback equa-
lizer is adjusted after the playback output adjust-
ment, the playback output should be readjusted.
6. Recording Current Adjustment
SETUP
1. Power voltage 50/60 Hz AC rated for the unit in
the destination country.
. Input signal:-1 kHz — 60 kB = Mic Input
. Output terminals: ’ LINE OUT
. Tape selector switch position: - NORMAL, SPE-
’ CIAL/CrO2, Fe-Cr, or Metal
. Tape speed selector:- STANDARD or HIGH
. Load:- Measuring instrument input impedance
PROCEDURE
1. In Rec mode, adjust the mic volume to 0 VU.
Line Out output at this time is reference level
O cB.
. Adjust trimmers to provide a O dB output level
when tape is recorded and played back.
STANDARD speed R124 (Lch.) R224 (R ch.)
HIGH speed R123 (Lch.) R223 (R ch.)
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7. Recording Bias Current Adjustment (Temporal)
SETUP
1. Power voltage:— 50 Hz/60 Hz AC voitage rated for
the unit to be used in a market country.
2. Tape speed selector switch: — STANDARD.
3. Output terminal: — J414, L ch, J435, R ch
4. Load:— Measuring instrument input impedance.
PROCEDURES
1. Select Rec-Pause mode.
2. Connecta VTVM J414 (Hot) J444 (GND) Lch.
across J435 (Hot) J445 (GND) R ch.
3. Adjust trimmers to provide the following indica-
tions on the VT VM:
(1) Tape Selector in NORMAL position:
Adjust R410 (L ch.) and R411 (R ch.) to pro-
vide 1 mV. (P400)
(2) Tape Selector in SPECIAL/CrO2 psition:
Adjust R314 (common for L and R) to pro-
vide 1.5 mV. (PK11)
(3) Tape Selector in Fe-Cr position:
Adjust R316 (Common for L and R) to pro-
vide 1.1 mV. (PK11)
(4) Tape Selector in METAL position:
; Adjust R318 (common for L and R) to pro-
vide 2.7 mV. (PK11)
NOTE: 1. Adjust (1) NORMAL position first. If
after adjusting other positions R410 or
R411 are altered so readjust for all the
other positions.
. The above adjustments are tentative.
Finally, adjustments to provide Rec-Play-
back frequency characteristics failling
within specified ranges are necessary.