Test Mode - Sony DPS-V55 Service Manual

[Operation of Test Mode]
• The test mode is executed according to order the following.
• Press N button, and come back the before item.
1 Begin the test mode
[POWER]
1) Press
[SYSTEM] [BYPASS]
,
2) The self-diagnosis is executed and indicated error mes-
sages in case of something wrong a hardware (See [Self-
diagnosis Message]), begin the test mode in case of no
damage.
Display:
* * * * * * * * * * * * * * * *
2 Key switch and rotary encoder check
1) Press any switch button, and display a figure to button.
Button Display
n 0
N
1
BYPASS 2
Fx TYPE 3
2) Right down of display value increases like 1, 2, 3...... if
rotating JOG knob in clockwise, or decreases like 0, 9,
8...... if rotating in counter clockwise.
(Limit of figure: 000 to 255)
Display:
switch button's figure
(state of pressed all)
3 MIDI circuit check
• Preparation:
The MIDI cable (DIN cable) between MIDI IN connec-
tor and MIDI OUT/THRU connector.
(If not available this check with not connect cable)
1) Press n button.
(This check begin with display all figure of switch but-
ton and rotary encoder position.)
2) Begin the MIDI circuit check, and display result.
Display: No problem
Circuit problem or no connecting cable
• If retry of check, Press n button, and Press N button
with begin.
button while Press three buttons
and N simultaneously.
Button Display
ENTER
SAVE
SYSTEM
EXIT
* * * * *
rotary encoder count
(optional value)
SECTION 4

TEST MODE

4 Signal check 1 (Bypass check mode)
1) Press n button.
2) Enter the bypass check mode.
Analog output muting is OFF, and each channel the out-
put signal as intact as input signal.
Display:
5 Signal check 2 (Sine wave output mode)
1) Press n button.
2) Enter the sine wave output mode.
Each channel output jack output a sine wave 1 kHz (about
7.3 Vp-p). (Input have muting)
Display:
6 Ending the test mode
1) Press n button.
4
2) The display change the following.
5
Display:
6
7
• Item 1 or 2 is executed at the work contents.
1 Next item (A) - (E) is press
(A) Change the ROM.
(B) Change the battery.
(C) Change the RAM.
(D) Customer request is initial state.
(E) Besides the above-mentioned. Repair connected
This case display the following few seconds, and come
up power. (Initialize is done.)
Display:
2 Next item (F), (G) is press
(F) Hardware is not change repair.
(G) Only check, such as function check.
This case come up power usual. (No initialize)
– 11 –
[ENTER]
with hardware on the main board.
[EXIT]
button.
button.