Yamaha MD4S Service Manual page 25

MD4S
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LINE INPUTS
INPUT LEVEL ····················· MINIMUM
MASTER
CUE MIX TO STEREO SWITCH ····· OFF
MASTER FADER ················ MINIMUM
MONITOR
2TR IN SWITCH ················· OFF
STEREO SWITCH ··············· OFF
CUE SWITCH ······················ OFF
MONITOR LEVEL ·············· MINIMUM
2-2.
The standard input signal is made when the sign wave
is 1 kHz, -10 dBm with the Jack opened, and the load
resistance of each output terminal is assumed to be the
following.
TRACK DIRECT OUT ········ 10 k ohm
INSERT OUT ······················· 10 k ohm
AUX SEND ·························· 10 k ohm
STEREO OUT ······················ 10 k ohm
MONITOR OUT ·················· 10 k ohm
PHONES (STEREO) ············ 40 ohm
2-3. Use disk
Disk for recording reproduction:
SONY MD DATA 140 MB
TE
L 13942296513
(MMD-140 or MMD-140 A)
V3025900T
TEST DISC 1: SONY MD AUDIO TEST 1
(TGYS1) TX800720
TEST DISC 2: Record the signal of "1 kHz -20
dBm" from truck1 to truck4 on the
disk for recording reproduction.
TEST DISC 3: MMD-351 (Respect swinging 0.4
mm) TX800730
TEST DISC 4: HTM-103 MO (Eccentric 100
µm) TX800740
2-4. Measurement
Low frequency oscillator
AC voltage meter
Distortion meter
CD filter amplifier (AMP-Z06)
MIDI equipment which corresponds to MTC
MIDI equipment which corresponds to MIDI
CLOCK
MIDI equipment which corresponds to MMC
3. Special Mode
3-1. Method of confirming the ROM version
When the power supply is turned on with the
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[UTILITY] key pressed, the ROM version is
displayed as the following.
"MD4S V1.00"
.
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3-2. Error Message
An error message is displayed on the FL display tube
as follows when the MD mechanism and the main
circuit board operation are abnormal.
Error message
DISC ERROR
00
There is abnormal MD.
01
Recording Re-try Failure
02 Recording Data Overflow
03 Lack of play Data
(to indicate data overflow at Recording)
04 Address Inconsistency at Recording
(to indicate data overflow at Recording)
ERROR
10 Pickup does not move to the inside.
11 Pickup does not move to the outside.
20 The magnetic head does not drop.
21 The magnetic head does not rise.
30
Spindle Error
40
Focus Error
50
Tracking Error
ERROR
F0
MD mechanism communication error (SENSE Signal)
F1
MD mechanism communication error (EEPROM)
F2
MD mechanism EEPROM checks the sum error
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3-3. About the DIAG 3 6 7 1 3 1 5
Foot switch [FC5] is connected to the PUNCH I/O
JACK, and the MIDI cable is connected between the
MIDI IN and MIDI OUT.
The display "D0 : DIAG IN" will appear on the FL
display tube when the power supply switch is turned
on while pressing the [DISPLAY] key and the [SET]
key.
It will then enter the following check modes. The
following check mode: the [FL/LED] display, the
operation key, [JOG/SHUTTLE], and the [MIDI/
I/O] check function.
In this state, the mixer's input signal goes directly
from AD to DA and is output.
Selection of check program
Each check program is selected by pressing the [MARK
SEARCH | <] or the [MARK SEARCH > |] key. Each
program starts when the [ENTER] key is pressed.
Response of OK or NG (Item's which the CPU judges)
[OK] or [NG] is displayed on the fluorescent display
tube.
The following ASCCI code in two bytes is output to
the terminal MIDI OUT.
OK ········· 4F, 4B
NG ········· 4E, 47
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<Check procedure>
Press the [MARK SEARCH > |] key. When "D1 :
.
FL/LED" is displayed, press the [ENTER] key.
Confirm that the fluorescent display and the LED
display light normally.
9 4 2 8
Incorrect
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