Roland BK-5 Service Notes page 36

Jan. 2012
OSCILLOSCOPE SETUP:
Volt div. = 5.00V / Time div. = 10.00ms
CH1 = PHONE LEFT
50hz / 15.00 Vpk (±1.50 Vpk)
CH2 = PHONE RIGHT
100hz / 15.00 Vpk (±1.50 Vpk)
2. Keep [VARIATION 4] button pressed and make sure the waveforms are completely nil.
3. Repeat all measures on the second PHONES socket.
4. Press [START/STOP] button to go to next test.
14. Output L/R sockets check
The display shows:
Setting:
Connect the BK-5 OUTPUT L/R to oscilloscope's CH1-CH2 inputs (by means of 2x Mono Audio cables).
1. Press [VARIATION 1] button. Check the following values on the oscilloscope:
OSCILLOSCOPE SETUP:
Volt div. = 5.00V/ Time div. = 1.00ms
OSCILLOSCOPE SETUP:
Volt div. = 5.00V / Time div. = 500us
CH1 = PHONE LEFT
1Khz / 15.00 Vpk (±1.50 Vpk)
CH2 = PHONE RIGHT
2Khz / 15.00 Vpk (±1.50 Vpk)
OSCILLOSCOPE SETUP:
Volt div. = 5.00V / Time div. = 100us
CH1 = PHONE LEFT
5Khz / 15.50 Vpk (±1.50 Vpk)
CH2 = PHONE RIGHT
10Khz / 16.00 Vpk (±1.50 Vpk)
CH1 = OUTPUT LEFT
It must be 1000hz (± 20)
It must be 7.30 Vpk (±1.00 Vpk)
CH2 = OUTPUT RIGHT
It must be 2000hz (± 20)
It must be 7.30 Vpk (±1.00 Vpk)