Sony NWZ-A844 / NWZ-A845 / NWZ-A846 / NWZ-A847 Service Manual ▷ View online
NWZ-A844/A845/A846/A847
17
4-5-1. Clock check (CLOCK)
The movement of an internal clock is confi rmed.
The movement of an internal clock is confi rmed.
Checking method:
1. Enter the test mode.
2. Press
1. Enter the test mode.
2. Press
the
[
v
]/[
V
] keys to select the “OTHER”, and press the
[
B
] key to enter the minor item.
3. Press the [
v
]/[
V
] keys to select the “CLOCK”.
4. Press the [
u
] key, date and time are displayed.
“START” changes into “OK” if the movement of an internal
clock is confi rmed.
clock is confi rmed.
Screen display
OTHER CLOCK
XX, XX XX XXXX
##:##:##.######
START
XX, XX XX XXXX : Date
##:##:##.######
##:##:##.######
: Time
5. Press the [BACK] key, return to minor item selection screen.
4-5-2. Key check (KEY)
The operation of the key is confi rmed.
The operation of the key is confi rmed.
Checking method:
1. Enter the test mode.
2. Press
1. Enter the test mode.
2. Press
the
[
v
]/[
V
] keys to select the “OTHER”, and press the
[
B
] key to enter the minor item.
3. Press the [
v
]/[
V
] keys to select the “KEY”.
4. Press the [
u
] key, all keys are displayed.
Screen display
OTHER KEY
UP VOL+
REW PLAY FF VOL–
DOWN OPTION
HOLD BACK
START
5. The character corresponding to the key is selected every time
the key is pressed. “OK” is displayed if all keys are pressed.
6. Slide the [HOLD] key from ON to OFF, return to minor item
selection screen.
4-5-3. Frequency check that presses key (KEYNUM)
The frequency to which the key is pressed, insert/pull out frequen-
cy of cradle and insert/pull out frequency of the headphone are
displayed.
The frequency to which the key is pressed, insert/pull out frequen-
cy of cradle and insert/pull out frequency of the headphone are
displayed.
Note: Not used for the servicing.
4-5-4. Format (FORMAT)
The user’s area is formatted, and ICV for the video and ICV for
audio are initialized.
The user’s area is formatted, and ICV for the video and ICV for
audio are initialized.
Note: Not used for the servicing.
Format the set from “Settings”
→ “Common settings” → “Format”
when it home menu in usually operates when the set should format
it.
it.
4-5-5. Destination setting (DEST)
The destination setting, language information, and sound pressure
regulation information are written in the NAND fl ash memory.
The destination setting, language information, and sound pressure
regulation information are written in the NAND fl ash memory.
Note: Not used for the servicing.
4-5-6. Sound pressure regulation setting (SPSET)
ON/OFF of sound pressure regulation is confi rmed.
ON/OFF of sound pressure regulation is confi rmed.
Note: Not used for the servicing.
4-5-7. Firmware version check (FWVER)
The fi rmware version is displayed.
The fi rmware version is displayed.
Checking method:
1. Enter the test mode.
2. Press
1. Enter the test mode.
2. Press
the
[
v
]/[
V
] keys to select the “OTHER” and press the
[
B
] key to enter the minor item.
3. Press the [
v
]/[
V
] keys to select the “FWVER”.
4. Press the [
u
] key, the fi rmware version is displayed.
Screen display
OTHER FWVER
X.XX.XX
MODEL NAME
NWZ-####
SERIAL NO
@@@@@@@
X.XX.XX
: Firmware version
####
: Model name
@@@@@@@
: Serial No.
5. Press the [BACK] key, return to minor item selection screen.
Note: It is not a malfunction though “NW-ERROR” is displayed by the
NWZ-A844.
“NW-ERROR” shows the NWZ-A844.
Ver. 1.1
NWZ-A844/A845/A846/A847
18
4-5-8. NAND capacity check (NCAPCHK)
Capacity of NAND fl ash memory, present bad block, maximum
bad block, and vender ID are displayed.
Capacity of NAND fl ash memory, present bad block, maximum
bad block, and vender ID are displayed.
Checking method:
1. Enter the test mode.
2. Press the [
1. Enter the test mode.
2. Press the [
v
]/[
V
] keys to select the “OTHER”, and press the
[
B
] key to enter the minor item.
3. Press the [
v
]/[
V
] keys to select the “NCAPCHK”.
4. Press the [
u
] key, capacity of NAND fl ash memory, present
bad block, maximum bad block, and vender ID are displayed.
Screen display
OTHER NCAPCHK
X GB
BAD BLOCK
CUR (####)/MAX (@@@@)
VENDOR (XXXXXXXX)
$$$$
X
: Capacity of NAND fl ash memory
@@@@ : Number of present bad block
(It makes an error the acquisition of the number of
bad blocks at “–1”)
####
: Number of maximum bud block
(It makes an error the acquisition of the vender ID
at “–1”)
$$$$
: Vender of NAND fl ash memory
5. Press the [BACK] key, return to minor item selection screen.
4-6. CLESTE
Screen display
MPTAPP (X.XX.XX)
POWER
AUDIO
VIDEO
VIDEO
AUDIO
VIDEO
VIDEO
OUT
OTHER
CLESTE
CLESTE
WCABLE
FM
WOCABLE
NC
SHUTDOWN
EXITTEST
SHUTDOWN
EXITTEST
4-6-1. Clear stereo setting (With cable) (WCABLE)
This mode is according to an original sound playback, for adjust-
ment to right and left sound.
This mode is according to an original sound playback, for adjust-
ment to right and left sound.
Note: Not used for the servicing.
4-6-2. Clear stereo setting (No cable) (WOCABLE)
This mode is according to an original sound playback, for adjust-
ment to right and left sound.
This mode is according to an original sound playback, for adjust-
ment to right and left sound.
Note: Not used for the servicing.
4-7. FM
Screen display
MPTAPP (X.XX.XX)
POWER
AUDIO
VIDEO
VIDEO
AUDIO
VIDEO
VIDEO
OUT
OTHER
CLESTE
CLESTE
FM — RCVCHK
NC
SHUTDOWN
EXITTEST
SHUTDOWN
EXITTEST
4-7-1. Reception output check (RCVCHK)
FM tuning checked.
FM tuning checked.
Checking method:
1. Enter the test mode.
2. Press
1. Enter the test mode.
2. Press
the
[
v
]/[
V
] keys to select the “FM”, and press the [
B
]
key to select the “RCVCHK”.
3. Press the [
u
] key, “90.00 MHz” is displayed.
4. In this state, each time the [
b
] key is pressed, frequency is
changes in the following order.
Screen display
FM RCVCHK
90.00 MHz
[VOL : 30]
[RSSI : XX]
[Sense-H : XX]
[Sense-L : XX]
90.00
MHz
(default)
→ 76.00 MHz → 95.75 MHz → 107.75
MHz
→ 87.50 MHz → 98.00 MHz → 108.00 MHz → 100.00
MHz
5. In this state, each time the [
B
] key is pressed, the LCD back-
light brightness is switched.
6. In this state, each time the [OPTION] key is pressed, color bar
is displayed.
7. In this state, slide the [HOLD] key from OFF to ON. Each time
the [
B
]/[
b
] keys are pressed, frequency changes in 0.05 MHz.
8. Press the [BACK] key, return to minor item selection screen.
NWZ-A844/A845/A846/A847
19
4-8. NC
Screen display
MPTAPP (X.XX.XX)
POWER
AUDIO
VIDEO
VIDEO
AUDIO
VIDEO
VIDEO
OUT
OTHER
CLESTE
FM
CLESTE
FM
NC — GAIN-L
SHUTDOWN GAIN-R
EXITTEST
EXITTEST
4-8-1. Microphone gain (L-ch) adjustment (GAIN-L)
Microphone gain (L-ch) is adjusted.
Microphone gain (L-ch) is adjusted.
Note: Not used for the servicing.
4-8-2. Microphone gain (R-ch) adjustment (GAIN-R)
Microphone gain (R-ch) is adjusted.
Microphone gain (R-ch) is adjusted.
Note: Not used for the servicing.
4-9. Shutdown (SHUTDOWN)
Function that power supply of set can be turned off without ending
static test mode.
Function that power supply of set can be turned off without ending
static test mode.
Procedure:
1. Enter the test mode.
2. Press
1. Enter the test mode.
2. Press
the
[
v
]/[
V
] keys to select the “SHUTDOWN”, and press
the [
B
] key to select the “SURE ?”.
3. Press the [
u
] key, turn the power off while having entered the
test mode.
20
NWZ-A844/A845/A846/A847
SECTION 4
EXPLODED VIEWS
1
9-885-140-61 REAR ASSY (for BLACK) (NWZ-A845: AEP, UK)
1
9-885-140-64 REAR ASSY (for BLACK) (NWZ-A845: EE)
1
9-885-141-31 REAR ASSY (for BLACK) (NWZ-A845: CH)
1
9-885-141-32 REAR ASSY (for BLACK)
(NWZ-A845: E, IND, AUS, JE)
1
9-885-141-33 REAR ASSY (for BLACK) (NWZ-A846: E, AUS, JE)
1
9-885-147-30 REAR ASSY (for BLACK) (NWZ-A844: AEP, UK)
1
9-885-147-31 REAR ASSY (for WHITE) (NWZ-A844: AEP, UK)
1
9-885-147-33 REAR ASSY (for WHITE) (NWZ-A845: AEP, UK)
1
9-885-147-35 REAR ASSY (for BLACK) (NWZ-A846: AEP, UK)
1
9-885-147-36 REAR ASSY (for BLACK) (NWZ-A847)
1
9-885-147-37 REAR ASSY (for BLACK) (NWZ-A844: EE)
1
9-885-147-38 REAR ASSY (for BROWN) (NWZ-A844: EE)
1
9-885-147-39 REAR ASSY (for BLACK) (NWZ-A844: MX)
1
9-885-147-40 REAR ASSY (for WHITE) (NWZ-A844: CH)
1
9-885-147-41 REAR ASSY (for BROWN) (NWZ-A844: CH)
1
9-885-147-42 REAR ASSY (for BLACK) (NWZ-A844: IND)
1
9-885-147-43 REAR ASSY (for WHITE)
(NWZ-A844: E, IND, AUS, JE)
1
9-885-147-44 REAR ASSY (for BROWN) (NWZ-A844: IND)
2
4-154-989-01 SHEET (VOL WIRE)
3
4-154-988-02 SHEET (BATTERY WIRE)
4
4-154-958-01 SUPPORT
(PWB)
5
4-166-265-01 KAPTON SHEET (CN1)
6
3-242-558-11 SPACER (LINE IN)
7
4-164-283-01 ADHESIVE, SHEET (SUPPORT PWB)
8
4-159-411-01 ADHESIVE, SHEET (HOLDER JACK)
9
4-163-141-01 SCREW, 0+P 1.4 X 5 (for WHITE, BROWN)
9
4-163-141-11 SCREW, 0+P 1.4 X 5 (for BLACK)
10
4-158-958-01 SHAFT (GUARD) (for BLACK, BROWN)
10
4-158-958-11 SHAFT (GUARD) (for WHITE)
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
Note:
• -XX and -X mean standardized parts, so
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Items marked “*” are not stocked since
they are seldom required for routine ser-
vice. Some delay should be anticipated
when ordering these items.
vice. Some delay should be anticipated
when ordering these items.
• The mechanical parts with no reference
number in the exploded views are not sup-
plied.
plied.
• Color Indication of Appearance Parts Ex-
ample:
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color Cabinet’s Color
• Refer to “COLOR VARIATION” in the
“SERVICING NOTES” (page 4) about col-
or variation of model and destination.
or variation of model and destination.
4-1. REAR PANEL SECTION
Note 1: This illustration sees the set from rear side.
• Abbreviation
AUS :
AUS :
Australian
model
CH
: Chinese model
EE
: East European model
IND
: Indian model
JE
:
Tourist
model
MX
: Latin American model
1
10
9
8
main section
3
2
4
5
6
7
Ver. 1.1
Note 2: Ref. No. 8 has been deleted in the midway of production.
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