Wednesday, January 27, 2016

DENON AVR-2308 - AVR-888 Initialization - Factory Reset - Test mode - Error display - Idle current adjustment - AV Receiver Repair and Service - Manual Tips

                                                Category: AV Receiver Repair and Service 

Contents of this article 
  • Initialization procedure 
  • Accessing Test mode 
  • Idle current adjustment  

DENON AVR-2308 - AVR-888

Initialization (Factory Reset) 
AV SURROUND RECEIVER/AMPLIFIER initialization should be performed when the µcom, peripheral parts of µcom, and Digital P.W.B. are replaced.
1. Switch off the unit.
2. Hold the following SPEAKERS-A button and SPEAKERS-B button, and switch on the unit.
3. Check that the entire display is flashing with an interval of about 1 second, and release your fingers from the 2 buttons and the microprocessor will be initialized.
Note: If step 3 does not work, start over from step 1.
# All user settings will be lost and this factory setting will be recovered when this initialization mode. So make sure to memorize your setting for restoring after the initialization.
JIG to use for servicing
When you repair the printing board, you can use the following JIG (Extention cable kit). Please order to Denon Official Service
Distributor in your region if necessary.
00D SPK- 561 EXTENSION UNIT KIT : 1 Set
00D SPK- 562 TUCP CONN. JOINT KIT : 1 Set
CHECK WITH TEST MODE
ucom/DSP Error Display Mode
1. Operation Spec
µcom version display mode:
When the following conditions are satisfied at its starting state, error information is displayed before version information.
Starting method (same as µcom version display):
E3,JP model
While pressing 2 buttons, "STATUS " and "DIMMER ", turn on on/off button.
Then, press "STATUS" button to display the following information on the FL Display.
E2,E2A model
While pressing 2 buttons, "RT " and "PTY ", turn on on/off button.
Then, press "PTY" button to display the following information on the FL Display.
2. Display Order
Error information > Destination information > Main-µcom version information > Sub-µcom version information > DSP version information
3. Display
Any one of the following list is displayed, in the priority of 1,2,3,4
Condition
State
Display
1.Sub-µcom NG
No response from Sub-µcom
" SUB ERROR 01 "
2. DIR NG
No response from DIR
" DIR ERROR 01 "
3. DSP1 NG








When DSP boot, executing DSP reset makes no change to BUSY port "L".
" DSP1  ERROR 01 "
No change to BUSY port "L" before issuing DSP command.
" DSP1 ERROR02 "
When DSP data read, executing WRITE="L" makes no change to ACK="H".
" DSP1 ERROR03 "
When DSP data read, executing REQ="L" makes no change to ACK="L".
" DSP1 ERROR04 "
When DSP data write, executing WRITE="H" makes no change to ACK="H".
" DSP1 ERROR 05"
When DSP data write, executing REQ="L" makes no change to ACK="L".
" DSP1 ERROR06 "
When DSP special code boot, executing DSP reset makes no change to
BUSY port "L".
" DSP1 ERROR11 "

No change to BUSY port "L" before issuing DSP special read command.
" DSP1 ERROR 12"
No change to BUSY port "L" before DSP version read.
" DSP1 ERROR 13 "

4. Both SUB/DSP OK

(No error display, version display only)

ADJUSTMENT
Audio Section
Idling Current (1U-3854-1)
Required measurement equipment: DC Voltmeter
Preparation
(1) Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room tempereture 15°C > 30°C (59°F > 86°F).
(2) Presetting
POWER (Power sourse switch) OFF
SPEAKER (Speaker terminal) No load
(Do not connect speaker, dummy resistor, etc.)
Adjustment
(1) Remove top cover and set VR401, VR402, VR403,
VR404, VR405, VR406, VR407, on 1U-3854-1 (Power Amp Unit) at fully counterclockwise .
(2) Connect DC Voltmeter to test points (FRONT-Lch: CX063 3,4 pin, FRONT-Rch: CX063 1,2  pin, CENTER ch: CX063 5.6 pin, SURROUND-Lch: TP102
3, 4 pin, SURROUND-Rch: CX082 1,2 pin,
SURROUND BACK-Lch: CX082 7,8 pin, SURROUND BACK-Rch: CX082 5, 6 pin).
(3) Connect power cord to AC Line, and turn power switch "ON".
(4) Presetting.
MASTER VOLUME : "---" counterclockwise ( min.) MODE : 7CH STEREO FUNCTION : CD
(5) Allow 2 minutes, and turn VR401 clockwise to adjust the TEST POINT voltage to 6.5 mV ± 0.5 mV DC.
(6) After 10 minutes from preset, turn VR401 to set the voltage to 8 mV ± 0.5 mV DC.
(7) Adjust the Variable Resistors of other channels in the same way.
(8) After 5 minutes from (6), turn VR401 to set the voltage to 8 mV ± 0.5 mV DC.
(9) Adjust the Variable Resistors of other channels in the same way.
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