Grass Valley KDD-PSU - Manual (Page 33)

KDD-PSU Power Supply Unit
7 Service Instructions
7.1 General
WARNING — To reduce the risk of electrical shock, do not remove cover or back.
No user-serviceable parts inside. Refer to qualified service personnel.
7.2 Status LEDs
The status LEDs on the front of the KDD-PSU shows the state of the external and
internal voltages and the operating state of the internal fans:
AC
On = AC Power OK
Ext.Batt On = External battery voltage is OK
Fans On = Both internal fans are OK
Off = One or both internal fans don’t run
48V-1 On = 48 V DC output 1 is OK
48V-2 On = 48 V DC output 2 is OK
12V On = 12V DC power supply for external Hub is OK (for future use)
7V On = 7V DC power for RAM Recorder buffering is OK
7.3 Fuses
• Double pole neutral fusing — Disconnect mains power prior to servicing.
• Use correct fuse — Use only the fuse type and rating specified for this product.
7.3.1 Main Fuses
Fuse type: 2x T 8A / H 250V
Manufacturer: WICKMANN 181, SCHURTER SPT 0001.2513
Order no.: 003 117 300 214
7.3.2 Internal Fuses on Board RY3781
T1, T2 F 7A / 250 V
Manufacturer: LITTLEFUSE 312007 or SCHURTER FSF 0034.5143
Order no.: 003 117 301 010
Instruction Manual 33