Slot Test; Checking Slot Power Voltage - Yamaha M7CL-32 Service Manual

M7CL-32/M7CL-48

1-9 SLOT test

Contents: Checks the SIO4(Slot1), I/O of option SLOT1 to SLOT4, and power voltage.
Preparation: Insert the MY SLOT CHECK Ver.2 check jigs into SLOTs 1 to 3.
Example of executing screen
Test required or not
Total judgment of
inspection slot by slot
Selecting one check box clears
the other one.
Auto is selected in case of
no check box
Slot number being checked
Only Slot 1 is valid

1) Checking SLOT power voltage

Use of the MY SLOT CHECK Ver.2 check jig makes it
possible to check the SLOT power voltage automatically.
Before the SLOT test, the judgment voltage of the MY SLOT
CHECK Ver.2 check jig must be adjusted as specified. It is
possible to take measurement at each voltage terminal of
the MY SLOT CHECK Ver.2 check jig using a tester with
the power check box set to Manual.
• Adjusting judgment voltage of MY SLOT CHECK Ver.2
check jig
Adjust the judgment value following the procedures below so
that voltage supplied from the MY SLOT CHECK (+20 V,
+15 VA, +5 VA, +3.3 VD, -5 VA, -15 VA) can be detected to
be within ±5 %.
1. Preparation
· Power unit capable of outputting DC -15 V (-10 %) — +20 V
(+10 %) (Current capacity should be 300 mA or over for each
voltage)
(Supplies voltage to be adjusted [+20 V, +15 VA, +5 VA, +3.3
VD, -5VA, -15VA] to the CN2)
· Power unit capable of outputting DC +5 V (±10 %) (Current
capacity should be 300 mA or over)
(Supplies ±5 V to the CN1 A-46 B-46 pin.)
2. Procedure
Adjusting +20 V
q Supply +20 V of CN2 (voltage to be adjusted) with +21.2 V.
w Turn the volume VR1 slowly and stop it just after the IC16-
18 pin (adjustment judging pin) output is changed from 5 V
to 0 V.
e Supply +20 V of CN2 with 18.8 V.
r Turn the volume VR2 slowly and stop it just after the IC16-
17 pin (adjustment judging pin) output is changed from 5 V
to 0 V.
132
NG SLOT Total Check SLOT1 POWER SUPPLY
SLOT 1 2 3 NG: +20V HIGHER (LOWER)
Test
Judge NG NG NG NG: SLOT1 WCK MY-WC
NG: [SO:12345678-->SI:1234xxxx]SI/SO 1
Power Auto Manual NG: MUTE_MY
SLOT1 NG: SLOT1 CON
OK WCK NG: SLOT1 COMM
OK SIO(IN=all DSP7)
OK COM NG: FSMY=xxxx
OK FS NG: SYNC=xxxx
OK ADDRESS NG: 64FS=xxxx
OK DATA NG: 128FS=xxxx
OK POWER NG: 256FS=xxxx
OK IRQ NG: SLOT1 ADDR BUS(A10..A1) 000 X000 00X
OK /CON NG: SLOT1 DATA BUS(D15..D0) 0000 0000 00XX XXXX
AutiNext
START PAUSE CLOSE
Display example when power voltage
check result is NG
Given below are other NG display examples
Displays transmitted/received data.
The check result is NG because
the xxxx section (numeric value) is different
Only for Slot 1 (no COMM for the others)
The right end shows LSB, indicating
the bit of 0=OK, X=NG.
Judgment box if POWER=MANUAL is used.
OkData TxData
t Adjust supply voltage to be +21.2 V±0.3 V or over and check
that IC16-18 pin output is 0 V.
y Adjust supply voltage to be +18.8 V±0.3 V or over and check
that IC16-17 pin output is 0 V.
If the result of step t or y is NG, readjust from step q.
* Other voltages can be adjusted in the same manner referring
to the following chart.
Voltage to be adjusted Volume
+20 V VR1
+20 V VR2
+15 VA VR3
+15 VA VR4
+5 VA VR5
+5 VA VR6
DP(+5 D) VR7
DP(+5 D) VR8
+3.3 VD VR9
+3.3 VD VR10
-5 VA VR12
-5 VA VR11
-15 VA VR14
-15 VA VR13
2) Checking SIO (IN=all DSP7)
IN1—4, IN5—8, IN9—12, and IN13—16 from SLOT1 to
3 are connected to SI12 to SI27 of the #1(ICB01)—
#11(ICB11) in DSP7 respectively.
3) The COM test uses 31.25 Kbps and 0x00, 0x55, 0xaa, 0xff
(transmission and reception of total of 4 byte)
POWER VOLT
OK NG
Adjustment judging pin Supply voltage
IC16-18pin 21.2 V
IC16-17pin 18.8 V
IC16-16pin 15.78 V
IC16-15pin 14.23 V
IC16-14pin 5.27 V
IC16-13pin 4.73 V
IC16-12pin 5.27 V
IC16-11pin 4.73 V
IC20-18pin 3.58 V
IC20-17pin 3.24 V
IC20-15pin -5.27 V
IC20-16pin -4.73 V
IC20-13pin -15.78 V
IC20-14pin -14.23 V