19
X-HM81-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
• Check the connection between the BCO Assy and FRONT Assy.
• Check the IC5 and IC13 and its peripheral circuits. (BCO Assy)
Yes
• Replace the LCD MODULE.
Is LCD
power supply normal?
MOD500 Pin 2,29,34
• Check the connection between the BCO Assy and FRONT Assy.
• Check the IC4 and its peripheral circuits. (BCO Assy)
No
No
Yes
Is the
reset signal of LCD normal?
If MOD500-Pin 3 is "H", its
normal.
• Check the connection between the BCO Assy and FRONT Assy.
No
Yes
Are the
other signals of MOD500
normal?
(FRONT Assy)
(FRONT Assy)
• LCD does not lit
• Do not recognize it in Front USB
• Check the connection of Lug wire between the F_USB Assy and F_AUX Assy.
• Replace the CR870 (MODULE on BCO Assy).
No: Both device NG
• Replace the CR870 (MODULE on BCO Assy).
Mass storage
Device is OK, and is only Apple
Device NG?
• Check the connection between the F_USB Assy and BCO Assy.
• Check the IC9 and its peripheral circuits. (BCO Assy)
No
Yes
Yes
Is the 5V
power supply supplied in 5 and
6 Pins of CP500?
• Check the connection between the F_USB Assy and BCO Assy.
• Check the IC12 and its peripheral circuits. (BCO Assy)
• Replace the CR870 (MODULE on BCO Assy).
No
Yes
Is there USB
signal at 3 and 4 Pins of
CP500?
(F_USB Assy)
CD tray does not do working
(OPEN/CLOSE)
• Check connection between each cable.
No
Yes
Are CD Mecha and
CD Assy connected?
(CD Assy)
Yes
(CD Assy)
• Check the IC1601 and its peripheral circuits. (CD Assy)
No
When operating any keys,
does the signals of CD DSP(IC1601)
pin 108, 114 switch to "H" / "L"?
Yes
(CD Assy)
• Check the IC1606 and its peripheral circuits. (CD Assy)
No
When operating any keys,
does the signals of BTL Driver(IC1606)
pin 9, 10 switch to "H" / "L"?
Yes
(CD Assy)
• Check the IC1601 and its peripheral circuits. (CD Assy)
• Replace the CD Deck Motor.
No
When operating any keys,
does the signals of connector (PN1603)
pin 1, 3 switch to H" / "L"?
