Yamaha PSR-S710 Service Manual page 65

Test No. LCD display
50 050 : USB Storage Device Check
When a fl oppy disk is not inserted:
050 : USB Storage Device Check
NO DISK
OK:
050 : USB Storage Device Check
OK
NG:
050 : USB Storage Device Check
NG
51 051 : LAN Check
OK:
051 : LAN Check
OK
NG:
051 : LAN Check
NG
52 052 : Keyboard Type Check
OK:
052 : KeyboardType Check
OK
(16M)
56 056 : ROM Check2
OK:
056 : ROM Check2
OK
NG:
056 : ROM Check2
MAIN PROG ROM (IC *** , *** ) NG
SUB1 PROG ROM (IC *** ) NG
(Sub: PSR-S910 only)
*** : Location Number of IC
57 057 : RAM Check2
OK:
057 : RAM Check2
OK
NG:
057 : RAM Check2
MAIN SDRAM (IC *** , *** ) NG
SUB1 SDRAM (IC *** ) NG
(Sub1: PSR-S910 only)
*** : Location Number of IC
58 058 : BACKUP ROM Check2
OK:
058 : BACKUP ROM Check2
OK
NG:
058 : BACKUP ROM Check2
(IC *** ) NG
*** : Location Number of IC
Test descriptions, judging conditions, etc.
Testing if USB Storage devices can be used.
Connect a USB storage device (such as a USB fl oppy drive) to the [USB TO DEVICE] connector and
execute the test. (If a USB fl oppy drive is connected, insert a fl oppy disk before executing the test. If no
fl oppy disk is inserted, "NO DISK" will be shown on the LCD.)
1. Conduct sector read/write tests at ten points.
2. Reads every 100 sectors from sector 0.
3. Compares with the data after sector writing to confi rm agreement.
Check that "USB Storage Device Check OK" is displayed on the LCD.
Checking LAN.
Connect a router to the [LAN] connector with LAN cable and then execute the test.
Check that "LAN Check OK" is displayed on LCD.
Checking Keyboard Type.
Check that "Keyboard Type Check OK (16M)" is displayed on the LCD.
Checking the ROM connected to the CPU bus. (Complete check)
Check that "ROM Check2 OK" is displayed on the LCD.
It will take about 9 seconds on PSR-S710 or about 16 seconds on PSR-S910 for the check.
Case PSR-S710
MAIN PROG ROM (IC19) NG
Checking the RAM connected to the CPU bus. (Complete check)
Check that "RAM Check2 OK" is displayed on the LCD.
It will take about 2 seconds for the check.
Case PSR-S710
MAIN SDRAM (IC2, 6) NG
Checking the BACKUP ROM connected to the CPU bus. (Complete check)
Check that "BACKUP ROM Check2 OK" is displayed on the LCD.
It will take about 60 seconds on PSR-S710 or about 100 seconds on PSR-S910 for the check.
Case PSR-S710
IC20 NG
Case PSR-S910
MAIN PROG ROM (IC24, 25) NG
SUB1 PROG ROM (IC204) NG
SUB1 PROG ROM (IC204) No Card
Case PSR-S910
MAIN SDRAM (IC2, 6) NG
SUB1 SDRAM (IC203) NG
SUB1 SDRAM (IC203) No Card
Case PSR-S910
IC26 NG
PSR-S710/PSR-S910
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