CAUTION
RISK OF ELECTRICK SHOCK
DO NOT OPEN
WE RECOMMEND THAT ALL SERVICE OPERATIONS
ARE CARRIED OUT BY A TECHNICIAN IN THE MANNER
DESCRIBED IN THIS GUIDE.
IF NOT EXPLICITLY STATED OTHERWISE, DISCONNECT THE
AMPLIFIER FROM THE MAINS BEFORE OPERATING THE
AMPLIFIER.
WARNING! INTERNAL CAPACITORS BANK COULD BE CHARGED
AND HARMFUL: TAKE CARE OF COMPLETELY DISCHARGE
INTERNAL CAPACITORS BANK BEFORE HANDLING THE DEVICE
This technical document aims to be a support guide in repairing and
low-voltage testing the Ottocanali HGT series power amplifiers.
The troubleshooting approach will help you characterize the kind
of fault you incur. A recovery method and the related assembly
outline detail is thoroughly explained for the most common faults.
The components to be replaced are clearly shown to help their
identification. At the end of this guide you can find a detailed
list with the description and the respective Powersoft internal
reference code of the spare parts.
Always use an anti-static wrist band while servicing the amplifier.
This documentation contains proprietary information which is the
sole property of Powersoft S.p.A.
These documents are confidential and reserved and may not be
disclosed, reproduced and shared with third persons or used
without the express written permission from Powersoft S.p.A.
Should the service centre agreement between the two companies
be interrupted these documents must be returned to Powersoft
S.p.A. Italy or proof of their destruction be provided.
OTTOCANALI HGT | SERVICE MANUAL
Data are subject to change without notice.
For the latest release please refer to the online version available on
www.powersoft-audio.com.
Required Instrumentation
Q.ty Example/Comments
Dual stabilized power supply 30 Vdc 5 A
2
APLHA Electronica mod. AL852D or equivalent
Digital Oscilloscope 50 Mhz
1
TEKTRONIK TBS – 1052B-EDU or equivalent
Signal generator
1
Rigol DG1022, Feeltech FY3200S
Variac
1
Toroidal 3 KW (Mono phase)
Dummy load 1500 W 8 Ohm
1
TE CONNECTIVITY / CGS TE1500B10RJ Resistor
Soldering Station
1
WELLER PU81 + WSP80 or equivalent
SMD rework soldering station
1
GORDAK 952 or equivalent
Digital Multimeter
1
FLUKE 179 or equivalent
Pc with at least 1 eth board
1
INDEX
1. Display LED Configurations and further references
4
2. Opening the amplifier’s cover
6
8
4. Disassembling the DigiMod3004PFC4 Modules
9
5. Disassembling the 8CHHGT/STD/ANALOG
10
6. Disassembling the 8CHHGT/STD/DSPETH
10
7. Disassembling the 8CHHGT/STD/FRONT
12
8. Disassembling the 8CHHGT/STD/CNTRL Board
13
14
10. Output connector color code
15
11. SD Card FW Recovery Procedure
16
12. USB Pen Drive Formatting Procedure
16
13. USB Pen Drive FW Update Procedure
17
14. LOG files Extraction Procedure
17
15. Checking the Digi Board for Faults
18
20
17. Spare Parts/Repair Kits List
21
Index:
Summary of Contents for Ottocanali HGT Series
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