Roland PowerStack ST-2 Service Notes page 8

Sep . 2 0 1 0
Ver if y in g th e Ver sio n
1 . Tu rn all controls all the w ay cou nterclockw ise.
2 . H old d ow n the p ed al and insert a 1/ 4-inch stereo p hone p lu g into the
INPUT jack.
The p ow er com es on and the CHECK LED lights u p .
After ap p roxim ately 2 second s, the CHECK LED flashes, and the nu m ber
of flashes ind icates the version.
Exam p les: 1 flash: Version 1.00
2 flashes: Version 1.01
3 flashes: Version 1.02
3 . Release the p ed al.
After the version d isp lay, the u nit au tom atically changes to the Test
Mod e.
Da ta Ba ck u p a n d Resto r e
O p er a tio n s
This p rod u ct cannot save u ser d ata. Backing u p u ser d ata d u ring servicing is
not requ ired .
Per f o r m in g a Fa cto r y Reset
This p rod u ct has no factory-reset featu re.
Up d a tin g th e Sy stem
A system u p d ate cannot be p erform ed for this p rod u ct. If an u p d ate is
requ ired , rep lace w ith an u p d ated circu it board . Up d ates can be accom p lished
only at the factory.
8
O p er a tio n Test
Items Required
AC ad ap tor (PSA-series d evice)
Am p -equ ip p ed m onitor sp eaker x 1
Signal generator x 1
Oscilloscop e x 1
N oise m eter x 1
Stabilized p ow er su p p ly x 1
Am m eter x 1
47-kW d u m m y p lu g (1/ 4-inch m ono p hone typ e) x 1
Inspection Items
1. Measurement of Current Consumption (p . 9)
2. Volume and AD/DA Test (p . 9)
3. Analog Volume Test (p . 9)
4. Noise Test (p . 9)
5. BYPASS Test (p . 10)
6. LED and Battery Operation Test (p . 10)
The tests ju st d escribed can safely be carried ou t in any sequ ence. Also, som e
item s involve testing w hile in the Test Mod e, and others involve testing in the
norm al u sage state. For d etailed inform ation, refer to the p roced u res for the
resp ective test item s d escribed later in this d ocu m ent.
Entering the Test Mode and Verifying the
Version
1 . Tu rn all controls all the w ay cou nterclockw ise.
2 . H old d ow n the p ed al and insert a 1/ 4-inch m ono p hone p lu g into the
INPUT jack.
The p ow er com es on and the CHECK LED lights u p .
After ap p roxim ately 2 second s, the CHECK LED flashes, and the nu m ber
of flashes ind icates the version.
Exam p les: 1 flash: Version 1.00
2 flashes: Version 1.01
3 flashes: Version 1.02
3 . Release the p ed al.
After the version d isp lay, the u nit au tom atically changes to the Test
Mod e.
Quitting the Test Mode
After entering the Test Mod e and d isp laying the version, d ep ress the p ed al.
Alternatively, d isconnect the p lu g from the INPUT jack to sw itch off the
p ow er.
ST-2